CN109956666B - Optical glass and optical element - Google Patents

Optical glass and optical element Download PDF

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CN109956666B
CN109956666B CN201811480139.5A CN201811480139A CN109956666B CN 109956666 B CN109956666 B CN 109956666B CN 201811480139 A CN201811480139 A CN 201811480139A CN 109956666 B CN109956666 B CN 109956666B
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content
optical glass
mass
cao
total content
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CN109956666A (en
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庄司昂浩
金子将士
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Hoya Corp
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Hoya Corp
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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/062—Glass compositions containing silica with less than 40% silica by weight
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C4/00—Compositions for glass with special properties
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements

Abstract

The invention relates to an optical glass and an optical element. The optical glass has a refractive index nd of 1.69 to 1.87 and an Abbe number vd of 24 to 36, and contains 10 to 50 mass% of SiO 2 40 mass% or less of TiO 2 5 to 60 mass% of Nb 2 O 5 10 mass% or less of BaO, la 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 And Lu 2 O 3 The total content of [ B ] is 13.5 mass% or less, [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Is 0.6 or less, contains Li 2 O、Na 2 O and K 2 1 or more glass components of O including 1 or more glass components selected from MgO, caO, srO and BaO, the total content of MgO, caO, srO and BaO being R' O, li 2 O、Na 2 O and K 2 The total content of O is R 2 O，[(CaO/R'O)+(Na 2 O/R 2 O)]Greater than 1.1, [ (MgO + CaO)/R' O]Is 0.44 to 1.0.

Description

Optical glass and optical element
Technical Field
The present invention relates to an optical glass and an optical element.
Background
Patent document 1 discloses an optical glass having a refractive index nd of 1.79 or more and an abbe number ν d of 27 or more. The optical glass described in patent document 1 is characterized in that the inside of the glass does not devitrify in a reheating test. In addition, the glass described in patent document 1 contains La in order to obtain the above optical characteristics 2 O 3 And the like.
Documents of the prior art
Patent literature
Patent document 1: japanese patent laid-open publication No. 2006-219365.
Problems to be solved by the invention
However, since the rare earth oxide is more likely to change the raw material price and has a limited supply amount than other glass components, it is desirable to reduce the amount of the rare earth oxide used from the viewpoint of stable supply of glass.
Further, the rare earth oxide component has an effect of increasing the specific gravity of the glass as compared with other glass components, and cannot be said to be a component preferable for the low specific gravity of the glass.
For an optical element mounted on an optical system of an autofocus system, a reduction in weight is required to reduce power consumption when driving an autofocus function. If the specific gravity of glass can be reduced, the weight of an optical element such as a lens can be reduced.
Disclosure of Invention
Accordingly, an object of the present invention is to provide an optical glass having a desired optical constant, capable of being stably supplied, and having a small specific gravity, and an optical element formed of the optical glass.
Means for solving the problems
The gist of the present invention is as follows.
(1) An optical glass having a refractive index nd of 1.69 to 1.87 and an Abbe's number vd of 24 to 36,
SiO 2 the content of (B) is 10 to 50 mass%,
TiO 2 the content of (B) is 40 mass% or less,
Nb 2 O 5 the content of (B) is 5 to 60 mass%,
the content of BaO is 10 mass% or less,
La 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 and Lu 2 O 3 The total content of (B) is 13.5 mass% or less,
Nb 2 O 5 content of (2) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]The content of the acid-resistant acrylic resin is less than 0.6,
comprising Li 2 O、Na 2 O and K 2 At least 1 glass component in O,
comprises 1 or more glass components selected from MgO, caO, srO and BaO,
the mass ratio of the content of CaO to the total content R 'O of MgO, caO, srO and BaO (CaO/R' O), and Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O (Na) 2 O/R 2 O) total of [ (CaO/R' O) + (Na) 2 O/R 2 O)]Is greater than 1.1 of the total weight of the rubber,
the mass ratio of the total content of MgO and CaO to the total content R 'O [ (MgO + CaO)/R' O ] is 0.44 to 1.0.
(2) An optical glass having a refractive index nd of 1.69 to 1.87 and an Abbe number vd of 24 to 36,
SiO 2 the content of (B) is 10 to 50 mass%,
TiO 2 the content of (B) is 40 mass% or less,
Nb 2 O 5 the content of (B) is 5 to 60 mass%,
the content of BaO is 10 mass% or less,
La 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 and Lu 2 O 3 The total content of (B) is 13.5 mass% or less,
Nb 2 O 5 content of (2) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]The content of the acid-resistant acrylic resin is less than 0.6,
Na 2 content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] 2 O/(R 2 O+R'O)]Is greater than 0 and the content of the active ingredient,
the content of CaO and the total content R 2 The mass ratio of the total content of O and the total content R' O [ CaO/(R) 2 O+R'O)]Is a content of at least 0.1,
the mass ratio of the total content of MgO and CaO to the total content R 'O [ (MgO + CaO)/R' O ] is 0.44 to 1.0.
(3) An optical glass having a refractive index nd of 1.69 to 1.87 and an Abbe's number vd of 24 to 36,
SiO 2 the content of (B) is 10 to 50 mass%,
TiO 2 the content of (B) is 40 mass% or less,
Nb 2 O 5 the content of (B) is 5 to 60 mass%,
the content of BaO is 10 mass% or less,
La 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 and Lu 2 O 3 The total content of (B) is 13.5 mass% or less,
Nb 2 O 5 and TiO 2 The total content of (B) is 30% by mass or more,
Nb 2 O 5 content of (2) and Nb 2 O 5 And TiO 2 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]The content of the organic acid is below 0.7,
total content of MgO, caO, srO and BaO, R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 A mass ratio of the total content of O and the total content R 'O [ R' O/(R) 2 O+R'O)]Is 0.7 to 1.0 percent,
the mass ratio of the total content of MgO and CaO to the total content R 'O [ (MgO + CaO)/R' O ] is 0.26 to 1.0.
(4) An optical glass having a refractive index nd of 1.69 to 1.87 and an Abbe's number vd of 24 to 36,
SiO 2 the content of (B) is 10 to 50 mass%,
TiO 2 the content of (B) is 40 mass% or less,
Nb 2 O 5 the content of (B) is 5 to 60 mass%,
B 2 O 3 the content of (B) is 5% by mass or less,
the content of BaO is 10 mass% or less,
La 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 and Lu 2 O 3 The total content of (B) is 13.5 mass% or less,
Nb 2 O 5 content of (2) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]The content of the organic acid is below 0.5,
total content of MgO, caO, srO and BaO, R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 The mass ratio of the total content of O and the total content R 'O [ R' O/(R) 2 O+R'O)]Is in the range of 0.71 to 1.0,
the mass ratio of the total content of MgO and CaO to the total content R 'O [ (MgO + CaO)/R' O ] is 0.26 to 1.0.
(5) An optical element comprising the optical glass according to any one of the above (1) to (4).
Effects of the invention
According to the present invention, it is possible to provide an optical glass having a desired optical constant and a small specific gravity, and an optical element formed of the optical glass.
Detailed Description
Hereinafter, embodiments of the present invention will be described. In the present invention and the present specification, the glass composition of the optical glass is expressed on an oxide basis unless otherwise specified. The "oxide-based glass composition" is a glass composition obtained by converting all glass raw materials into substances which are decomposed during melting and exist as oxides in the optical glass, and the expression of each glass component is described as SiO 2 、TiO 2 And the like. Unless otherwise specified, "percent" means "mass%" with the content and the total content of the glass component being based on mass.
The content of the glass component can be determined by a known method, for example, inductively coupled plasma atomic emission spectrometry (ICP-AES), inductively coupled plasma mass spectrometry (ICP-MS), or the like. In the present specification and the present invention, the content of 0% of a constituent means that the constituent is not substantially contained, and the constituent is allowed to be contained at an inevitable impurity level.
In the present specification, unless otherwise specified, the refractive index refers to a refractive index nd at the d-line (wavelength 587.56 nm) of helium.
The abbe number ν d is used as a value representing a dispersion-related property, and is represented by the following formula. Here, nF is the refractive index at the F line (wavelength 486.13 nm) of blue hydrogen, and nC is the refractive index at the C line (656.27 nm) of red hydrogen.
νd＝(nd-1)/(nF-nC)
The partial dispersion ratios Pg and F are expressed as follows using refractive indices ng, nF, and nc at g, F, and c lines.
Pg,F＝(ng-nF)/(nF-nC)
In a plane where the horizontal axis represents the abbe number ν d and the vertical axis represents the partial dispersion ratio Pg, F, the normal line is expressed by the following equation.
Pg,F(0)＝0.6483-(0.0018×νd)
Further, the dispersion of the partial dispersion ratio Pg, F from the normal line is expressed as follows.
ΔPg,F＝Pg,F-Pg,F(0)
The optical glass of the present invention will be described below as embodiment 1, embodiment 2, embodiment 3, and embodiment 4. The action and effect of each glass component in embodiments 2, 3, and 4 are the same as those of each glass component in embodiment 1. Therefore, in embodiments 2, 3, and 4, the overlapping description with respect to embodiment 1 is appropriately omitted.
Embodiment 1
With the optical glass of embodiment 1,
the refractive index nd is 1.69-1.87, the Abbe number vd is 24-36,
SiO 2 the content of (B) is 10 to 50 mass%,
TiO 2 the content of (B) is 40 mass% or less,
Nb 2 O 5 the content of (B) is 5 to 60 mass%,
the content of BaO is 10 mass% or less,
La 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 and Lu 2 O 3 The total content of (B) is 13.5 mass% or less,
Nb 2 O 5 content of (2) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]The content of the organic acid is below 0.6,
comprising Li 2 O、Na 2 O and K 2 At least 1 glass component in O,
comprises 1 or more glass components selected from MgO, caO, srO and BaO,
the mass ratio of the content of CaO to the total content R 'O of MgO, caO, srO and BaO (CaO/R' O), and Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O (Na) 2 O/R 2 O) total of [ (CaO/R' O) + (Na) 2 O/R 2 O)]Is greater than 1.1 of the total weight of the rubber,
the mass ratio of the total content of MgO and CaO to the total content R 'O [ (MgO + CaO)/R' O ] is 0.44 to 1.0.
In the optical glass of embodiment 1, siO 2 The content of (A) is 10-50%. SiO 2 2 The lower limit of the content of (b) is preferably 12%, and more preferably 15%, 17%, and 20% in this order. Furthermore, siO 2 The upper limit of the content of (b) is preferably 45%, and more preferably 40%, 37%, and 35% in this order.
When SiO 2 If the content of (b) is too small, the thermal stability may be lowered. In addition, when SiO 2 If the content of (3) is too large, the refractive index may decrease. By mixing SiO 2 The content of (b) is in the above range, whereby an optical glass having excellent thermal stability can be obtained.
In the optical glass of embodiment 1, tiO 2 The content of (B) is 40% or less. TiO 2 2 The upper limit of the content of (b) is preferably 35%, and more preferably 30%, 28%, and 25% in this order. TiO 2 2 The lower limit of the content of (B) is preferably 0%, furtherLess preferably 5%, 8% or 10%. TiO 2 2 The content of (B) may be 0%.
When TiO is added 2 If the content of (3) is too large, the partial dispersion ratio Pg, F may increase. In addition, when TiO 2 When the content of (b) is too small, desired optical constants may not be obtained. By mixing TiO with 2 The content of (b) is within the above range, whereby the specific gravity can be reduced and the increase in the raw material cost of the glass can be suppressed.
In the optical glass of embodiment 1, nb 2 O 5 The content of (A) is 5-60%. Nb 2 O 5 The lower limit of the content of (b) is preferably 7%, and more preferably 8%, 9%, and 10% in this order. Nb 2 O 5 The upper limit of the content of (b) is preferably 45%, and more preferably 40%, 35%, and 30% in this order.
When Nb 2 O 5 If the content of (b) is too small, desired refractive index nd, abbe number vd and partial dispersion ratio Pg, F may not be obtained. In addition, when Nb 2 O 5 When the content of (b) is too large, thermal stability is lowered and high dispersion is likely to occur. By mixing Nb 2 O 5 The content of (b) is in the above range, so that the partial dispersion ratio Pg, F can be reduced, and the increase in the raw material cost of the glass can be suppressed.
In the optical glass of embodiment 1, the content of BaO is 10% or less. The upper limit of the content of BaO is preferably 9%, and more preferably 8% and 7% in this order. The lower limit of the BaO content is preferably 0%, and more preferably 1%, 2%, 3%, and 3.5% in this order. The content of BaO may be 0%.
When the content of BaO is too large, the specific gravity may increase. When the content of BaO is too small, thermal stability may be lowered. By setting the content of BaO in the above range, an optical glass having excellent thermal stability can be obtained.
In the optical glass of embodiment 1, la 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 And Lu 2 O 3 Total content of [ La ] 2 O 3 +Y 2 O 3 +Gd 2 O 3 +Yb 2 O 3 +Lu 2 O 3 ]Is 13.5% or less. Total content [ La ] 2 O 3 +Y 2 O 3 +Gd 2 O 3 +Yb 2 O 3 +Lu 2 O 3 ]The upper limit of (b) is preferably 12%, and more preferably 11%, 10%, and 9% in this order. Total content [ La ] 2 O 3 +Y 2 O 3 +Gd 2 O 3 +Yb 2 O 3 +Lu 2 O 3 ]The lower limit of (b) is preferably 0%, and more preferably 0.5%, 1%, and 1.5% in this order.
When the total content is [ La ] 2 O 3 +Y 2 O 3 +Gd 2 O 3 +Yb 2 O 3 +Lu 2 O 3 ]If the specific gravity is too large, the specific gravity may increase. Further, when the total content [ La ] is 2 O 3 +Y 2 O 3 +Gd 2 O 3 +Yb 2 O 3 +Lu 2 O 3 ]If the ratio is too small, desired optical constants may not be obtained. By adding the total content [ La ] 2 O 3 +Y 2 O 3 +Gd 2 O 3 +Yb 2 O 3 +Lu 2 O 3 ]By setting the above range, an optical glass having desired optical constants can be obtained.
In the optical glass of embodiment 1, nb 2 O 5 Content of (2) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Is 0.6 or less. Mass ratio [ Nb 2 O 5 /(Nb 2 O 5 +TiO 2 )]The upper limit of (d) is preferably 0.60, and more preferably 0.55, 0.52, and 0.50 in this order. Further, mass ratio [ Nb 2 O 5 /(Nb 2 O 5 +TiO 2 )]Preferably greater than 0, and the lower limits thereof are preferably 0.10, 0.20, 0.30 in this order.
When mass ratio [ Nb 2 O 5 /(Nb 2 O 5 +TiO 2 )]If the specific gravity is too large, the specific gravity may increase. When mass ratio [ Nb 2 O 5 /(Nb 2 O 5 +TiO 2 )]Too smallIn this case, the partial dispersion ratio Pg, F may increase. By mixing the mass ratio [ Nb 2 O 5 /(Nb 2 O 5 +TiO 2 )]By setting the specific gravity within the above range, the increase in the raw material cost of the glass can be suppressed while reducing the specific gravity.
The optical glass of embodiment 1 contains Li 2 O、Na 2 O and K 2 The glass component of 1 or more of O preferably contains Na 2 O, more preferably Na 2 O and K 2 O。
By the optical glass containing Li 2 O、Na 2 O and K 2 1 or more glass components in O, thereby improving the meltability of the glass.
The optical glass of embodiment 1 contains 1 or more glass components selected from MgO, caO, srO, and BaO, preferably contains CaO, and more preferably contains CaO and BaO.
By containing 1 or more glass components selected from MgO, caO, srO, and BaO, the decrease in refractive index nd can be suppressed.
In the optical glass of embodiment 1, the mass ratio of the content of CaO to the total content R 'O of MgO, caO, srO and BaO (CaO/R' O) and Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O (Na) 2 O/R 2 O) total of [ (CaO/R' O) + (Na) 2 O/R 2 O)]Greater than 1.1.[ (CaO/R' O) + (Na) 2 O/R 2 O)]The lower limit of (b) is preferably 1.2, and more preferably 1.3, 1.35, and 1.4 in this order. [ (CaO/R' O) + (Na) 2 O/R 2 O)]The upper limit of (d) is preferably 1.9, and more preferably 1.85 and 1.8 in this order.
When [ (CaO/R' O) + (Na) 2 O/R 2 O)]If the specific gravity is too small, the specific gravity may be lowered, and the desired optical constant may not be obtained. By adding [ (CaO/R' O) + (Na) 2 O/R 2 O)]By setting the above range, an optical glass having a low specific gravity and a desired optical constant can be obtained.
In the optical glass of embodiment 1, the mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO and BaO [ (MgO + CaO)/R' O ] is 0.44 to 1.0. The lower limit of the mass ratio [ (MgO + CaO)/R' O ] is preferably 0.5, and more preferably 0.55 and 0.6 in this order. The upper limit of the mass ratio [ (MgO + CaO)/R' O ] is preferably 0.9, and more preferably 0.85, 0.8, and 0.78 in this order.
When the mass ratio [ (MgO + CaO)/R' O ] is too small, the specific gravity may increase. If the mass ratio [ (MgO + CaO)/R' O ] is too large, the thermal stability may be lowered. By setting the mass ratio [ (MgO + CaO)/R' O ] in the above range, an optical glass having a reduced specific gravity can be obtained.
Next, preferred embodiments of the content and ratio of the glass component in the optical glass of embodiment 1 will be described in detail below.
In the optical glass of embodiment 1, na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] 2 O/(R 2 O+R'O)]Preferably greater than 0, and the lower limits thereof are more preferably 0.1, 0.13, 0.15 in this order. Mass ratio [ Na ] 2 O/(R 2 O+R'O)]The upper limit of (b) is preferably 0.8, and more preferably 0.7, 0.6, and 0.5 in this order.
When mass ratio is [ Na ] 2 O/(R 2 O+R'O)]If the amount is too small, the meltability of the glass may decrease. When mass ratio is [ Na ] 2 O/(R 2 O+R'O)]If too large, the thermal stability may be lowered.
In the optical glass of embodiment 1, the content of CaO and the total content R are 2 The mass ratio of the total content of O and the total content R' O [ CaO/(R) 2 O+R'O)]Preferably 0.1 or more, and the lower limits thereof are, in order, more preferably 0.15, 0.18, 0.2. Mass ratio [ CaO/(R) ] 2 O+R'O)]The upper limit of (d) is preferably 0.95, and more preferably 0.90, 0.87, and 0.85 in this order.
When the mass ratio is [ CaO/(R) ] 2 O+R'O)]If the average molecular weight is too small, the refractive index may decrease and the specific gravity may increase. When the mass ratio is [ CaO/(R) ] 2 O+R'O)]If too large, the thermal stability may be lowered.
In the optical glass of embodiment 1, nb 2 O 5 And TiO 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]The lower limit of (b) is preferably 5%, and more preferably 10%, 15%, 20%, and 22% in this order. Further, the total content [ Nb ] 2 O 5 +TiO 2 ]The upper limit of (b) is preferably 60%, and more preferably 50%, 45%, and 40% in this order.
By adding the total content of [ Nb ] 2 O 5 +TiO 2 ]By setting the above range, an optical glass having desired optical constants can be obtained.
In the optical glass of embodiment 1, the total content R 'O of MgO, caO, srO and BaO, the total content R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 The mass ratio of the total content of O [ R 'O/(R' O + R) 2 O)]The lower limit of (b) is preferably 0.50, and more preferably 0.55, 0.60, and 0.65 in this order. Mass ratio of [ R 'O/(R' O + R) 2 O)]The upper limit of (b) is preferably 0.99, and more preferably 0.98 and 0.97 in this order.
When the mass ratio is [ R 'O/(R' O + R) 2 O)]If too small, the refractive index nd may decrease. When the mass ratio is [ R 'O/(R' O + R) 2 O)]If too large, the thermal stability may be lowered. By mixing the mass ratio of [ R 'O/(R' O + R) 2 O)]By setting the above range, an optical glass having a high refractive index can be obtained.
In the optical glass of embodiment 1, B 2 O 3 The upper limit of the content of (b) is preferably 5%, and more preferably 4.5%, 4.2%, and 4% in this order. Furthermore, B 2 O 3 The lower limit of the content of (b) is preferably 0%, and more preferably 0.5%, 0.7%, and 1% in this order. B is 2 O 3 The content of (B) may be 0%.
In addition, when B 2 O 3 If the content of (b) is too large, the refractive index nd may decrease. By mixing B 2 O 3 The content of (b) is in the above range, whereby the thermal stability of the glass can be improved.
Preferred embodiments of the content and ratio of the glass components other than those described above in the optical glass of embodiment 1 will be described in detail below.
In the optical glass of embodiment 1, P 2 O 5 The upper limit of the content of (b) is preferably 5%, and more preferably 4.5%, 4%, and 3.5% in this order. Furthermore, P 2 O 5 The lower limit of the content of (b) is preferably 0%, and more preferably 0.5%, 1%, and 1.5% in this order. P 2 O 5 The content of (b) may be 0%. By mixing P with 2 O 5 The content of (b) is in the above range, so that the increase of the partial dispersion ratio Pg, F can be suppressed and the thermal stability of the glass can be maintained.
In the glass of embodiment 1, al 2 O 3 The upper limit of the content of (b) is preferably 3%, and more preferably 2%, 1.5%, and 1% in this order. Al (Al) 2 O 3 The content of (B) may be 0%. By mixing Al 2 O 3 The content of (b) is in the above range, whereby devitrification resistance and thermal stability of the glass can be maintained.
In the glass of embodiment 1, zrO 2 The lower limit of the content of (b) is preferably 3%, and more preferably 4%, 5%, and 6% in this order. Furthermore, zrO 2 The upper limit of the content of (b) is preferably 15%, and more preferably 13%, 11%, and 10% in this order. By reacting ZrO 2 The content of (b) is in the above range, whereby the desired optical constants can be realized and the partial dispersion ratios Pg, F can be reduced.
In the glass of embodiment 1, WO 3 The upper limit of the content of (b) is preferably 5%, and more preferably 3%, 1%, and 0% in this order. By mixing WO 3 The content of (b) is in the above range, whereby the transmittance can be improved and the partial dispersion ratios Pg, F and specific gravity can be reduced.
In embodiment 1, bi 2 O 3 The upper limit of the content of (b) is preferably 5%, and more preferably 3%, 1%, and 0% in this order. By adding Bi 2 O 3 The content of (b) is in the above range, whereby the thermal stability of the glass can be improved and the partial dispersion ratios Pg, F and specific gravity can be reduced.
In the glass of embodiment 1, li 2 The upper limit of the content of O is preferably 10%, and more preferably 8%, 6%, and 5% in this order. Li 2 The content of O is preferably small, and the lower limit thereof is preferably 0%.
In the glass of embodiment 1, na 2 The upper limit of the content of O is preferably 15%, and more preferably 12%, 10%, and 8% in this order. Na (Na) 2 The lower limit of the content of O is preferably 1%, and more preferably 2%, 3%, and 4% in this order.
In the glass of embodiment 1, K 2 The upper limit of the content of O is preferably 15%, and more preferably 12%, 10%, and 8% in this order. K is 2 The lower limit of the content of O is preferably 0.05%, and more preferably 0.1% and 0.15% in this order.
Li 2 O、Na 2 O and K 2 O is a component that reduces the partial dispersion ratio Pg, F, and has the effect of lowering the liquidus temperature and improving the thermal stability of the glass, but if the content of these is too large, the chemical durability and weather resistance are reduced. Thus, li 2 O、Na 2 O and K 2 The respective contents of O are preferably within the above ranges.
In the optical glass of embodiment 1, li 2 O、Na 2 O and K 2 Total content R of O 2 The lower limit of O is preferably 1.05%, and more preferably 1.5%, 2%, and 2.5% in this order. Further, the total content R 2 The upper limit of O is preferably 15%, and more preferably 13%, 11%, and 10% in this order. By adding the total content R 2 By setting O in the above range, the specific gravity of the glass can be reduced and the thermal stability of the glass can be maintained.
In the glass of embodiment 1, cs 2 The upper limit of the content of O is preferably 10%, and more preferably 5%, 3%, and 1% in this order. Cs 2 The lower limit of the content of O is preferably 0%.
Cs 2 O has an effect of improving the thermal stability of the glass, but when the content of these is too large, the chemical durability and weather resistance are reduced. Thus, cs 2 The respective contents of O are preferably in the above ranges.
In the glass of embodiment 1, the upper limit of the content of MgO is preferably 25%, and more preferably 23%, 21%, and 20% in this order. The lower limit of the content of MgO is preferably 0%.
In the glass of embodiment 1, the upper limit of the content of CaO is preferably 25%, and more preferably 23%, 21%, and 20% in this order. The lower limit of the CaO content is preferably 0%.
In the glass of embodiment 1, the upper limit of the SrO content is preferably 20%, and more preferably 10%, 5%, and 3% in this order. The lower limit of the SrO content is preferably 0%.
MgO, caO, srO, and BaO all have the effect of improving the thermal stability and devitrification resistance of the glass, and are glass components that make it easy to increase the refractive index and achieve a desired constant. However, when the content of these glass components is too large, the specific gravity increases, the high dispersion property is impaired, and the thermal stability and devitrification resistance of the glass decrease. Therefore, the content of each of these glass components is preferably within the above range.
In the glass of embodiment 1, the lower limit of the total content [ MgO + CaO ] of MgO and CaO is preferably 0%, and more preferably 5%, 8%, and 10% in this order. The upper limit of the total content [ MgO + CaO ] is preferably 30%, and more preferably 28%, 25%, and 22% in this order. The total content [ MgO + CaO ] is preferably in the above range from the viewpoint of suppressing an increase in specific gravity and a decrease in thermal stability.
In the glass of embodiment 1, the upper limit of the total content R' O of MgO, caO, srO and BaO is preferably 30%, and more preferably 28%, 25% and 22% in this order. The lower limit of the total content R' O is preferably 0%, and more preferably 5%, 8%, and 10% in this order. The total content R' O may be 0%. By setting the total content R' O in the above range, it is possible to suppress an increase in specific gravity, achieve a desired refractive index, and maintain thermal stability without hindering high dispersion.
In the glass of embodiment 1, the upper limit of the content of ZnO is preferably 20%, and more preferably 10%, 5%, and 3% in this order. The lower limit of the content of ZnO is preferably 0%.
ZnO is a component having an effect of improving the thermal stability of the glass. However, when the content of ZnO is too large, the specific gravity increases. Therefore, the content of ZnO is preferably in the above range from the viewpoint of improving the thermal stability of the glass and maintaining desired optical constants.
In the optical glass of embodiment 1, la 2 O 3 The upper limit of the content of (b) is preferably 15%, and more preferably 14.5%, 14%, and 13.5% in this order. Further, la 2 O 3 The lower limit of the content of (b) is preferably 0%, and more preferably 1%, 1.5%, and 2% in this order. La 2 O 3 The content of (B) may be 0%. By mixing La 2 O 3 The content of (b) is in the above range, whereby a desired optical constant can be realized, an increase in specific gravity can be suppressed, and the partial dispersion ratios Pg, F can be reduced.
In the glass of embodiment 1, Y 2 O 3 The upper limit of the content of (b) is preferably 20%, and more preferably 10%, 5%, and 3% in this order. Furthermore, Y 2 O 3 The lower limit of the content of (b) is preferably 0%.
When Y is 2 O 3 When the content (b) is too large, the thermal stability of the glass is lowered, and the glass is easily devitrified during production. Therefore, from the viewpoint of suppressing the decrease in thermal stability of the glass, Y 2 O 3 The content of (b) is preferably in the above range.
In the glass of embodiment 1, ta 2 O 5 The upper limit of the content of (b) is preferably 20%, and more preferably 10%, 5%, and 3% in this order. Further, ta 2 O 5 The lower limit of the content of (b) is preferably 0%.
Ta 2 O 5 The glass component has an effect of improving the thermal stability of the glass and is a component that lowers the partial dispersion ratio Pg, F. On the other hand, when Ta 2 O 5 When the content of (b) is too large, the thermal stability of the glass is lowered, and a molten residue of the glass raw material is likely to be generated when the glass is molten. In addition, the specific gravity increases. Thus, ta 2 O 5 The content of (b) is preferably in the above range.
In the glass of embodiment 1, sc 2 O 3 The content of (b) is preferably 2% or less. Further, sc 2 O 3 The lower limit of the content of (b) is preferably 0%.
In the glass of embodiment 1, hfO 2 The content of (b) is preferably 2% or less. Further, hfO 2 The lower limit of the content of (b) is preferably 0%.
Sc 2 O 3 、HfO 2 Has the effect of improving the dispersion of glass, but is also an expensive component. Thus, sc 2 O 3 、HfO 2 The respective contents of (b) are preferably in the above ranges.
In the glass of embodiment 1, lu 2 O 3 The content of (b) is preferably 2% or less. Furthermore, lu 2 O 3 The lower limit of the content of (b) is preferably 0%.
Lu 2 O 3 The glass component has an effect of improving the high dispersion property of the glass, but is also a glass component that increases the specific gravity of the glass because of its large molecular weight. Thus, lu 2 O 3 The content of (b) is preferably in the above range.
In the glass of embodiment 1, geO 2 The content of (b) is preferably 2% or less. Furthermore, geO 2 The lower limit of the content of (b) is preferably 0%.
GeO 2 This is a very expensive component among glass components generally used, although it has a function of increasing the refractive index nd. Therefore, geO is considered to suppress an increase in the production cost of glass 2 The content of (b) is preferably in the above range.
In the glass of embodiment 1, gd 2 O 3 The content of (b) is preferably 2% or less. In addition, gd 2 O 3 The lower limit of the content of (b) is preferably 0%.
When Gd is present 2 O 3 When the content of (b) is too large, thermal stability is lowered. In addition, when Gd 2 O 3 When the content of (b) is too large, the specific gravity of the glass increases. Therefore, gd is effective in maintaining the thermal stability of the glass well and suppressing the increase in specific gravity 2 O 3 The content of (b) is preferably in the above range.
In the glass of embodiment 1, yb 2 O 3 The content of (b) is preferably 2% or less. In addition, yb 2 O 3 The lower limit of the content of (b) is preferably 0%.
Yb 2 O 3 Because of the ratio of La 2 O 3 、Gd 2 O 3 、Y 2 O 3 The molecular weight is large, and therefore, the specific gravity of the glass is increased. When the specific gravity of the glass increases, the mass of the optical element increases. For example, when a lens having a large mass is incorporated in an auto-focus type image pickup lens, power required for driving the lens at the time of auto-focus increases, and the consumption of a battery becomes severe. Therefore, it is desirable to make Yb 2 O 3 The content of (b) is reduced, and the increase in specific gravity of the glass is suppressed.
In addition, when Yb is 2 O 3 When the content of (A) is too large, the thermal stability of the glass is lowered. Yb from the viewpoint of preventing the thermal stability of the glass from lowering and suppressing the increase in specific gravity 2 O 3 The content of (b) is preferably in the above range.
The glass of embodiment 1 is preferably composed mainly of the above-described glass component, i.e., siO as an essential component 2 And Nb 2 O 5 And TiO as an optional component 2 、BaO、B 2 O 3 、P 2 O 5 、Al 2 O 3 、ZrO 2 、WO 3 、Bi 2 O 3 、Li 2 O、Na 2 O、K 2 O、Cs 2 O、MgO、CaO、SrO、ZnO、La 2 O 3 、Y 2 O 3 、Ta 2 O 5 、Sc 2 O 3 、HfO 2 、Lu 2 O 3 、GeO 2 、Gd 2 O 3 And Yb 2 O 3 The total content of the glass components is preferably more than 95%, more preferably more than 98%, still more preferably more than 99%, and still more preferably more than 99.5%.
The glass of the present embodiment is preferably composed of substantially the above glass components, but may contain other components within a range not to impair the action and effect of the present invention. In the present invention, the inclusion of inevitable impurities is not excluded.
(other Components)
The optical glass may contain a small amount of Sb as a refining agent in addition to the above components 2 O 3 、CeO 2 And so on. Total amount of clarifying agent (additional addition)Added amount) is 0% or more, preferably less than 1%, more preferably 0% or more and 0.5% or less.
The added amount is an amount of the refining agent expressed by weight percentage, where the total content of all glass components except the refining agent is defined as 100%.
Pb, cd, as, th and the like are components which may cause environmental load. Thus, pbO, cdO, thO 2 The content of (b) is preferably 0 to 0.1%, more preferably 0 to 0.05%, still more preferably 0 to 0.01%, and particularly preferably substantially not containing PbO, cdO, or ThO 2 。
As 2 O 3 The content of (A) is preferably 0 to 0.1%, more preferably 0 to 0.05%, still more preferably 0 to 0.01%, and particularly preferably substantially not containing As 2 O 3 。
Further, the optical glass can obtain a high transmittance over a wide range of the visible region. In order to effectively utilize such a characteristic, it is preferable that the optical glass contains no coloring element. Examples of the coloring element include Cu, co, ni, fe, cr, eu, nd, er, and V. Any element is preferably less than 100 mass ppm, more preferably 0 to 80 mass ppm, further preferably 0 to 50 mass ppm or less, and particularly preferably substantially not contained.
Ga, te, tb, and the like are components that do not need to be introduced, and are expensive components. Therefore, ga in mass% 2 O 3 、TeO 2 、TbO 2 The content ranges of (b) are each preferably 0 to 0.1%, more preferably 0 to 0.05%, further preferably 0 to 0.01%, further preferably 0 to 0.005%, further preferably 0 to 0.001%, and particularly preferably substantially none.
(glass characteristics)
< refractive index nd >
In the optical glass of embodiment 1, the refractive index nd is 1.69 to 1.87. The refractive index nd can also be set to 1.70 to 1.865, or 1.75 to 1.860. The refractive index nd can be adjusted by adjusting SiO 2 、TiO 2 、Nb 2 O 5 Etc. are controlled accordingly.
< Abbe number ν d >
In the optical glass of embodiment 1, abbe number ν d is 24 to 36. The abbe number ν d can be set to 25 to 35, or 26 to 34. Abbe number vd can be adjusted by adjusting SiO 2 、TiO 2 、Nb 2 O 5 Etc. are controlled accordingly.
< specific gravity of glass >
The optical glass of embodiment 1 preferably has a specific gravity of 3.95 or less, and more preferably 3.80 or less, 3.70 or less, 3.67 or less, and 3.65 or less in this order. The lower limit is preferably 2.60, as the specific gravity is smaller, the better. The specific gravity can be adjusted by SiO 2 、B 2 O 3 、Li 2 O、Na 2 O、K 2 O、MgO、CaO、SrO、BaO、ZrO 2 、La 2 O 3 、Gd 2 O 3 、Nb 2 O 5 、TiO 2 The content of (b) is thereby controlled.
< partial Dispersion ratio Pg, F >
The upper limit of the partial dispersion ratio Pg, F of the optical glass of embodiment 1 is preferably 0.6095, and more preferably 0.6050, 0.6030, 0.6025, and 0.6020 in this order. Further, the lower limit of the partial dispersion ratio Pg, F is preferably 0.5800 as small as possible. By setting the partial dispersion ratios Pg, F to the above ranges, optical glass suitable for correction of high-order chromatic aberration can be obtained.
The optical glass of embodiment 1 has a partial dispersion ratio Pg, a variation Δ Pg of F, and an upper limit of F of preferably 0.0150, and more preferably 0.0100, 0.0070, and 0.0065 in this order. Further, the lower the deviation Δ Pg, F, the better, the lower limit thereof is preferably-0.0050.
< glass transition temperature Tg >
The upper limit of the glass transition temperature Tg of the optical glass of embodiment 1 is preferably 740 ℃, and more preferably 700 ℃, 690 ℃, 685 ℃ and 680 ℃. The lower limit of the glass transition temperature Tg is preferably 430 ℃ and more preferably 460 ℃, 490 ℃ and 520 ℃ in this order. The glass transition temperature Tg can be adjusted by adjusting Li 2 O、Na 2 O、K 2 O or the like containingThe amount is controlled accordingly.
< light transmittance of glass >
The light transmittance of the optical glass of embodiment 1 can be evaluated by the coloring degrees λ 80, λ 70, and λ 5.
A spectral transmittance was measured in a wavelength range of 200 to 700nm for a glass sample having a thickness of 10.0 mm. + -. 0.1mm, and a wavelength at which the external transmittance becomes 80% was represented by λ 80, a wavelength at which the external transmittance becomes 70% was represented by λ 70, and a wavelength at which the external transmittance becomes 5% was represented by λ 5.
The λ 80 of the optical glass of embodiment 1 is preferably 520nm or less, more preferably 500nm or less, further preferably 475nm or less, and further preferably 455nm or less. The λ 70 is preferably 500nm or less, more preferably 480nm or less, still more preferably 465nm or less, and yet more preferably 450nm or less. Further, λ 5 is preferably 390nm or less, more preferably 380nm or less, and further preferably 370nm or less.
(production of optical glass)
The optical glass according to embodiment 1 may be produced by a known glass production method using glass raw materials prepared so as to have the above-described predetermined composition. For example, a plurality of compounds are prepared and mixed well to prepare a batch, and the batch is put into a quartz crucible or a platinum crucible to be roughly melted (rough melt). The melt obtained by the rough melting is quenched and pulverized to produce cullet. Further, the cullet is put into a platinum crucible and heated and remelted (remelt) to produce molten glass, and the molten glass is further clarified and homogenized, formed, and slowly cooled to obtain optical glass. The molten glass may be formed and slowly cooled by a known method.
Further, if a desired glass component can be introduced into the glass so as to have a desired content, the compound used in preparing the batch is not particularly limited, and examples of such a compound include oxides, carbonates, nitrates, hydroxides, fluorides, and the like.
(production of optical element, etc.)
A known method may be applied to manufacture an optical element using the optical glass of embodiment 1. For example, in the production of the above optical glass, a molten glass is poured into a mold and molded into a plate shape to produce a glass material made of the optical glass of the present invention. The obtained glass material is cut, ground and polished as appropriate to produce a cut piece having a size and a shape suitable for press forming. The cut piece is heated and softened, and press-molded (secondary hot press) by a known method to produce an optical element blank having a shape similar to that of the optical element. The optical element blank is annealed, and polished by a known method to produce an optical element.
The optically functional surface of the optical element thus produced may be coated with an antireflection film, a total reflection film, or the like depending on the purpose of use.
According to one embodiment of the present invention, an optical element formed of the above optical glass can be provided. Examples of the type of the optical element include: lenses such as spherical lenses and aspherical lenses, prisms, diffraction gratings, and the like. Examples of the shape of the lens include: various shapes such as a biconvex lens, a plano-convex lens, a biconcave lens, a plano-concave lens, a convex-mirror concave-convex lens, and a concave-mirror concave-convex lens. The optical element can be produced by a method including a step of processing a glass molded body made of the above optical glass. Examples of the processing include: cutting, rough grinding, finish grinding, polishing, and the like. When such processing is performed, the use of the glass can reduce breakage, and a high-quality optical element can be stably supplied.
Embodiment 2
With the optical glass of embodiment 2,
the refractive index nd is 1.69-1.87, the Abbe number vd is 24-36,
SiO 2 the content of (B) is 10 to 50 mass%,
TiO 2 the content of (B) is 40% by mass or less,
Nb 2 O 5 the content of (B) is 5 to 60 mass%,
the content of BaO is 10 mass% or less,
La 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 and Lu 2 O 3 The total content of (B) is 13.5 mass% or less,
Nb 2 O 5 content of (2) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]The content of the acid-resistant acrylic resin is less than 0.6,
Na 2 content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] 2 O/(R 2 O+R'O)]Is greater than 0 and the content of the active ingredient,
the content of CaO and the total content R 2 The mass ratio of the total content of O and the total content R' O [ CaO/(R) ] 2 O+R'O)]Is a content of at least 0.1,
the mass ratio of the total content of MgO and CaO to the total content R 'O [ (MgO + CaO)/R' O ] is 0.44 to 1.0.
In the optical glass of embodiment 2, siO 2 The content of (A) is 10-50%. SiO 2 2 The lower limit of the content of (b) is preferably 12%, and more preferably 15%, 17%, and 20% in this order. Further, siO 2 The upper limit of the content of (b) is preferably 45%, and more preferably 40%, 37%, and 35% in this order.
In the optical glass of embodiment 2, tiO 2 The content of (B) is 40% or less. TiO 2 2 The upper limit of the content of (b) is preferably 35%, and more preferably 30%, 28%, and 25% in this order. TiO 2 2 The lower limit of the content of (b) is preferably 0%, and more preferably 5%, 8%, and 10% in this order. TiO 2 2 The content of (B) may be 0%.
In the optical glass of embodiment 2, nb 2 O 5 The content of (A) is 5-60%. Nb 2 O 5 The lower limit of the content of (b) is preferably 7%, and more preferably 8%, 9%, and 10% in this order. Nb 2 O 5 The upper limit of the content of (b) is preferably 45%,further, 40%, 35%, and 30% are more preferable in this order.
In the optical glass of embodiment 2, the content of BaO is 10% or less. The upper limit of the content of BaO is preferably 9%, and more preferably 8% and 7% in this order. The lower limit of the BaO content is preferably 0%, and more preferably 1%, 2%, 3%, and 3.5% in this order. The content of BaO may be 0%.
In the optical glass of embodiment 2, la 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 And Lu 2 O 3 Total content of [ La ] 2 O 3 +Y 2 O 3 +Gd 2 O 3 +Yb 2 O 3 +Lu 2 O 3 ]Is 13.5% or less. Total content [ La ] 2 O 3 +Y 2 O 3 +Gd 2 O 3 +Yb 2 O 3 +Lu 2 O 3 ]The upper limit of (b) is preferably 12%, and more preferably 11%, 10%, and 9% in this order. Total content [ La ] 2 O 3 +Y 2 O 3 +Gd 2 O 3 +Yb 2 O 3 +Lu 2 O 3 ]The lower limit of (b) is preferably 0%, and more preferably 0.5%, 1%, and 1.5% in this order.
In the optical glass of embodiment 2, nb 2 O 5 Content of (2) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Is 0.6 or less. Mass ratio [ Nb 2 O 5 /(Nb 2 O 5 +TiO 2 )]The upper limit of (b) is preferably 0.60, and more preferably 0.55, 0.52, and 0.50 in this order. Further, mass ratio [ Nb 2 O 5 /(Nb 2 O 5 +TiO 2 )]Preferably greater than 0, and the lower limits thereof are more preferably 0.10, 0.20, 0.30 in this order.
In the optical glass of embodiment 2, na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] 2 O/(R 2 O+R'O)]Greater than 0. Mass ratio [ Na ] 2 O/(R 2 O+R'O)]The lower limit of (b) is preferably 0.1, and more preferably 0.13 and 0.15 in this order. Mass ratio [ Na ] 2 O/(R 2 O+R'O)]The upper limit of (b) is preferably 0.8, and more preferably 0.7, 0.6, and 0.5 in this order.
When mass ratio is [ Na ] 2 O/(R 2 O+R'O)]If the amount is too small, the meltability of the glass may be reduced. When mass ratio is [ Na ] 2 O/(R 2 O+R'O)]If too large, the thermal stability may be lowered.
In the optical glass of embodiment 2, the content of CaO is equal to the total content R 2 The mass ratio of the total content of O and the total content R' O [ CaO/(R) 2 O+R'O)]Is 0.1 or more. Mass ratio [ CaO/(R) 2 O+R'O)]The lower limit of (b) is preferably 0.15, and more preferably 0.18 and 0.2 in this order. Mass ratio [ CaO/(R) 2 O+R'O)]The upper limit of (d) is preferably 0.95, and more preferably 0.90, 0.87, and 0.85 in this order.
When the mass ratio is [ CaO/(R) ] 2 O+R'O)]If the amount is too small, the refractive index may decrease and the specific gravity may increase. When the mass ratio is [ CaO/(R) ] 2 O+R'O)]If too large, the thermal stability may be lowered.
In the optical glass of embodiment 2, the mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO and BaO [ (MgO + CaO)/R' O ] is 0.44 to 1.0. The lower limit of the mass ratio [ (MgO + CaO)/R' O ] is preferably 0.5, and more preferably 0.55 and 0.6 in this order. The upper limit of the mass ratio [ (MgO + CaO)/R' O ] is preferably 0.9, and more preferably 0.85, 0.8, and 0.78 in this order.
Next, preferred embodiments of the content and ratio of the glass component in the optical glass of embodiment 2 will be described in detail below.
The optical glass of embodiment 2 preferably contains Li 2 O、Na 2 O and K 2 More preferably, the glass component of 1 or more of O contains Na 2 O, further preferably contains Li 2 O、Na 2 O and K 2 O。
By the optical glass containing Li 2 O、Na 2 O and K 2 1 or more glass atoms in OAccordingly, the meltability of the glass can be improved.
The optical glass of embodiment 2 preferably contains 1 or more glass components selected from MgO, caO, srO, and BaO, more preferably contains CaO, and still more preferably contains CaO and BaO.
By containing 1 or more glass components selected from MgO, caO, srO, and BaO, the decrease in refractive index nd can be suppressed.
In the optical glass of embodiment 2, the mass ratio (CaO/R 'O) of the CaO content to the total content R' O of MgO, caO, srO and BaO and Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O (Na) 2 O/R 2 O) total of [ (CaO/R' O) + (Na) 2 O/R 2 O)]Preferably greater than 1.1, and the lower limits thereof are preferably 1.2, 1.3, 1.35, 1.4 in that order. [ (CaO/R' O) + (Na) 2 O/R 2 O)]The upper limit of (d) is preferably 1.9, and more preferably 1.85 and 1.8 in this order.
In the optical glass of embodiment 2, the total content R 'O of MgO, caO, srO and BaO, the total content R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 The mass ratio of the total content of O [ R 'O/(R' O + R) 2 O)]The lower limit of (b) is preferably 0.50, and more preferably 0.55, 0.60, and 0.65 in this order. Mass ratio of [ R 'O/(R' O + R) 2 O)]The upper limit of (b) is preferably 0.99, and more preferably 0.98 and 0.97 in this order.
In the optical glass of embodiment 2, nb 2 O 5 And TiO 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]The lower limit of (b) is preferably 5%, and more preferably 20%, 22%, 24%, and 25% in this order. Further, the total content [ Nb ] 2 O 5 +TiO 2 ]The upper limit of (b) is preferably 60%, and more preferably 50%, 45%, and 40% in this order.
In the optical glass of embodiment 2, B 2 O 3 The upper limit of the content of (b) is preferably 5%, and more preferably 4.5%, 4.2%, and 4% in this order. In addition, B 2 O 3 The lower limit of the content of (b) is preferably 0%, and more preferably 0 in this order.5％、0.7％、1％。B 2 O 3 The content of (B) may be 0%.
In the optical glass of embodiment 2, the content and ratio of the glass components other than those described above can be set to the same values as those of embodiment 1. The glass characteristics, the production of optical glass, the production of optical elements, and the like in embodiment 2 can be the same as those in embodiment 1.
Embodiment 3
With the optical glass of embodiment 3,
the refractive index nd is 1.69-1.87, the Abbe number vd is 24-36,
SiO 2 the content of (B) is 10 to 50 mass%,
TiO 2 the content of (B) is 40 mass% or less,
Nb 2 O 5 the content of (B) is 5 to 60 mass%,
the content of BaO is 10 mass% or less,
La 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 and Lu 2 O 3 The total content of (B) is 13.5 mass% or less,
Nb 2 O 5 and TiO 2 The total content of (B) is 30% by mass or more,
Nb 2 O 5 content of (2) and Nb 2 O 5 And TiO 2 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]The content of the organic acid is below 0.7,
total content of MgO, caO, srO and BaO R' O in combination with Li 2 O、Na 2 O and K 2 Total content R of O 2 The mass ratio of O to the total content R 'O [ R' O/(R) 2 O+R'O)]Is 0.7 to 1.0 percent,
the mass ratio of the total content of MgO and CaO to the total content R 'O [ (MgO + CaO)/R' O ] is 0.26 to 1.0.
In the optical glass of embodiment 3, siO 2 The content of (A) is 10-50%. SiO 2 The lower limit of the content of (b) is preferably 12%, and more preferably 15%, 17%, and 20% in this order. Furthermore, siO 2 The upper limit of the content of (b) is preferably 45%, and more preferably 40%, 37%, and 35% in this order.
In the optical glass of embodiment 3, tiO 2 The content of (B) is 40% or less. TiO 2 2 The upper limit of the content of (b) is preferably 35%, and more preferably 30%, 28%, and 25% in this order. TiO 2 2 The lower limit of the content of (b) is preferably 0%, and more preferably 5%, 8%, and 10% in this order. TiO 2 2 The content of (B) may be 0%.
In the optical glass of embodiment 3, nb 2 O 5 The content of (A) is 5-60%. Nb 2 O 5 The lower limit of the content of (b) is preferably 7%, and more preferably 8%, 9%, and 10% in this order. Nb 2 O 5 The upper limit of the content of (b) is preferably 45%, and more preferably 40%, 35%, and 30% in this order.
In the optical glass of embodiment 3, the content of BaO is 10% or less. The upper limit of the content of BaO is preferably 9%, and more preferably 8% and 7% in this order. The lower limit of the BaO content is preferably 0%, and more preferably 1%, 2%, 3%, and 3.5% in this order. The content of BaO may be 0%.
In the optical glass of embodiment 3, la 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 And Lu 2 O 3 Total content of [ La ] 2 O 3 +Y 2 O 3 +Gd 2 O 3 +Yb 2 O 3 +Lu 2 O 3 ]Is 13.5% or less. Total content [ La ] 2 O 3 +Y 2 O 3 +Gd 2 O 3 +Yb 2 O 3 +Lu 2 O 3 ]The upper limit of (3) is selected to be 12%, and more preferably 11%, 10%, and 9% in this order. Total content [ La ] 2 O 3 +Y 2 O 3 +Gd 2 O 3 +Yb 2 O 3 +Lu 2 O 3 ]The lower limit of (b) is preferably 0%, and more preferably 0.5%, 1%, and 1.5% in this order.
In the optical glass of embodiment 3, nb 2 O 5 And TiO 2 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is more than 30 percent. Further, the total content [ Nb ] 2 O 5 +TiO 2 ]The lower limit of (b) is preferably 30.05%, and more preferably 30.1%, 30.15%, and 30.2% in this order. Further, the total content [ Nb ] 2 O 5 +TiO 2 ]The upper limit of (b) is preferably 60%, and more preferably 50%, 45%, and 40% in this order.
By adding the total content of [ Nb ] 2 O 5 +TiO 2 ]By setting the above range, an optical glass having desired optical constants can be obtained.
In the optical glass of embodiment 3, nb 2 O 5 Content of (b) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Is 0.7 or less. Mass ratio [ Nb 2 O 5 /(Nb 2 O 5 +TiO 2 )]The upper limit of (b) is preferably 0.70, and more preferably 0.65, 0.60, 0.55, and 0.50 in this order. Further, mass ratio [ Nb 2 O 5 /(Nb 2 O 5 +TiO 2 )]Preferably greater than 0, and the lower limits thereof are preferably 0.10, 0.20, 0.30 in this order.
In the optical glass of embodiment 3, the total content R 'O of MgO, caO, srO and BaO, the total content R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 The mass ratio of the total content of O [ R 'O/(R' O + R) 2 O)]0.7 to 1.0. Mass ratio of [ R 'O/(R' O + R) 2 O)]The lower limit of (b) is preferably 0.71, and more preferably 0.72, 0.73, and 0.74 in this order. Mass ratio of [ R 'O/(R' O + R) 2 O)]The upper limit of (b) is preferably 0.99, and more preferably 0.98 and 0.97 in this order.
When the mass ratio is [ R 'O/(R' O + R) 2 O)]If too small, the refractive index nd may decrease. When the mass ratio of [ R 'O/(R' O + R) 2 O)]If too large, the thermal stability and meltability may be lowered, the dispersion may be lowered, and the specific gravity may be increased. By mixing the mass ratio of [ R 'O/(R' O + R) 2 O)]The above-mentioned range is set as the range,thereby obtaining the optical glass with high refractive index.
In the optical glass of embodiment 3, the mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO and BaO, [ (MgO + CaO)/R' O ], is 0.26 to 1.0. The lower limit of the mass ratio [ (MgO + CaO)/R' O ] is preferably 0.35, and more preferably 0.4, 0.45, and 0.5 in this order. The upper limit of the mass ratio [ (MgO + CaO)/R' O ] is preferably 0.98, and more preferably 0.96, 0.94, and 0.92 in this order.
When the mass ratio [ (MgO + CaO)/R' O ] is too small, the specific gravity may increase. When the mass ratio [ (MgO + CaO)/R' O ] is too large, thermal stability may be lowered. By setting the mass ratio [ (MgO + CaO)/R' O ] in the above range, an optical glass having a reduced specific gravity can be obtained.
Next, preferred embodiments of the content and ratio of the glass component in the optical glass of embodiment 3 will be described in detail below.
The optical glass of embodiment 3 preferably contains Li 2 O、Na 2 O and K 2 More preferably, the glass component of 1 or more of O contains Na 2 O, further preferably contains Li 2 O、Na 2 O and K 2 O。
By the optical glass containing Li 2 O、Na 2 O and K 2 1 or more glass components in O, thereby improving the meltability of the glass.
The optical glass of embodiment 3 preferably contains 1 or more glass components selected from MgO, caO, srO, and BaO, more preferably contains CaO, and still more preferably contains CaO and BaO.
By containing 1 or more glass components selected from MgO, caO, srO, and BaO, the decrease in refractive index nd can be suppressed.
In the optical glass of embodiment 3, the mass ratio of the content of CaO to the total content R 'O of MgO, caO, srO and BaO (CaO/R' O) and Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O (Na) 2 O/R 2 O) total of [ (CaO/R' O) + (Na) 2 O/R 2 O)]Is preferably largeThe lower limits of 1.1 are preferably 1.2, 1.3, 1.35 and 1.4 in this order. [ (CaO/R' O) + (Na) 2 O/R 2 O)]The upper limit of (d) is preferably 1.9, and more preferably 1.85 and 1.8 in this order.
In the optical glass of embodiment 3, na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] 2 O/(R 2 O+R'O)]Preferably greater than 0, and the lower limits thereof are more preferably 0.1, 0.13, 0.15 in this order. Mass ratio [ Na ] 2 O/(R 2 O+R'O)]The upper limit of (b) is preferably 0.8, and more preferably 0.7, 0.6, and 0.5 in this order.
In the optical glass of embodiment 3, the content of CaO is equal to the total content R 2 The mass ratio of the total content of O and the total content R' O [ CaO/(R) 2 O+R'O)]Preferably 0.1 or more, and the lower limits thereof are more preferably 0.15, 0.18, 0.2 in this order. Mass ratio [ CaO/(R) ] 2 O+R'O)]The upper limit of (b) is preferably 0.95, and more preferably 0.90, 0.87, and 0.85 in this order.
In the optical glass of embodiment 3, B 2 O 3 The upper limit of the content of (b) is preferably 5%, and more preferably 4.5%, 4.2%, and 4% in this order. In addition, B 2 O 3 The lower limit of the content of (b) is preferably 0%, and more preferably 0.5%, 0.7%, and 1% in this order. B is 2 O 3 The content of (B) may be 0%.
In the optical glass of embodiment 3, the content and ratio of the glass components other than those described above can be set to the same values as those of embodiment 1.
Therefore, the optical glass of embodiment 3 may be:
the refractive index nd is 1.69 to 1.87,
the Abbe number is 24-36,
SiO 2 the content of (A) is 10-50%,
TiO 2 the content of (A) is less than 40%,
Nb 2 O 5 the content of (A) is 5-60%,
the content of BaO is less than 10 percent,
La 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 and Lu 2 O 3 The total content of (B) is 13.5% or less,
Nb 2 O 5 and TiO 2 The total content of (A) is 30% or more,
Nb 2 O 5 content of (2) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]The content of the compound is less than 0.7,
total content of MgO, caO, srO and BaO R' O in combination with Li 2 O、Na 2 O and K 2 Total content R of O 2 The mass ratio of O to the total content R 'O [ R' O/(R) 2 O+R'O)]Is 0.7 to 1.0 percent,
the mass ratio of the total content of MgO and CaO to the total content R 'O [ (MgO + CaO)/R' O ] is 0.26 to 1.0,
Na 2 content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] 2 O/(R 2 O+R'O)]Is 0.1 or more.
Further, the optical glass of embodiment 3 may be:
the refractive index nd is 1.69 to 1.87,
the Abbe number is 24-36,
SiO 2 the content of (A) is 10-50%,
TiO 2 the content of (A) is less than 40%,
Nb 2 O 5 the content of (A) is 5-60%,
a BaO content of 3.5% to 10%,
La 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 and Lu 2 O 3 The total content of (B) is 13.5% or less,
Nb 2 O 5 and TiO 2 Has a total content of 30More than percent of the total weight of the composition,
Nb 2 O 5 content of (2) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]The content of the organic acid is below 0.60,
total content of MgO, caO, srO and BaO, R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 The mass ratio of the total content of O and the total content R 'O [ R' O/(R) 2 O+R'O)]Is 0.7 to 0.97 percent,
the mass ratio of the total content of MgO and CaO to the total content R 'O [ (MgO + CaO)/R' O ] is 0.26 to 1.0.
The glass characteristics, the production of optical glass, the production of optical elements, and the like in embodiment 3 can be the same as those in embodiment 1.
Embodiment 4
In the case of the optical glass of embodiment 4,
the refractive index nd is 1.69-1.87, the Abbe number vd is 24-36,
SiO 2 the content of (B) is 10 to 50 mass%,
TiO 2 the content of (B) is 40 mass% or less,
Nb 2 O 5 the content of (B) is 5 to 60 mass%,
B 2 O 3 the content of (B) is 5% by mass or less,
the content of BaO is 10 mass% or less,
La 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 and Lu 2 O 3 The total content of (B) is 13.5 mass% or less,
Nb 2 O 5 content of (2) and Nb 2 O 5 And TiO 2 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]The content of the organic acid is below 0.5,
total content of MgO, caO, srO and BaO, R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 The mass ratio of the total content of O and the total content R 'O [ R' O/(R) 2 O+R'O)]Is in the range of 0.71 to 1.0,
the mass ratio of the total content of MgO and CaO to the total content R 'O [ (MgO + CaO)/R' O ] is 0.26 to 1.0.
In the optical glass of embodiment 4, siO 2 The content of (A) is 10-50%. SiO 2 2 The lower limit of the content of (b) is preferably 12%, and more preferably 15%, 17%, and 20% in this order. Furthermore, siO 2 The upper limit of the content of (b) is preferably 45%, and more preferably 40%, 37%, and 35% in this order.
In the optical glass of embodiment 4, tiO 2 The content of (B) is 40% or less. TiO 2 2 The upper limit of the content of (b) is preferably 35%, and more preferably 30%, 28%, and 25% in this order. TiO 2 2 The lower limit of the content of (b) is preferably 0%, and more preferably 5%, 8%, and 10% in this order. TiO 2 2 The content of (B) may be 0%.
In the optical glass of embodiment 4, nb 2 O 5 The content of (A) is 5-60%. Nb 2 O 5 The lower limit of the content of (b) is preferably 7%, and more preferably 8%, 9%, and 10% in this order. Nb 2 O 5 The upper limit of the content of (b) is preferably 45%, and more preferably 40%, 35%, and 30% in this order.
In the optical glass of embodiment 4, B 2 O 3 The content of (B) is 5% or less. B is 2 O 3 The upper limit of the content of (b) is preferably 4.5%, and more preferably 4.2% and 4% in this order. Furthermore, B 2 O 3 The lower limit of the content of (b) is preferably 0%, and more preferably 0.5%, 0.7%, and 1% in this order. B 2 O 3 The content of (b) may be 0%.
When B is present 2 O 3 If the content of (d) is too large, the refractive index nd may decrease. By mixing B 2 O 3 The content of (b) is in the above range, whereby the thermal stability of the glass can be improved.
In the optical glass of embodiment 4, the content of BaO is 10% or less. The upper limit of the content of BaO is preferably 9%, and more preferably 8% and 7% in this order. The lower limit of the BaO content is preferably 0%, and more preferably 1%, 2%, 3%, and 3.5% in this order. The content of BaO may be 0%.
In the optical glass of embodiment 4, la 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 And Lu 2 O 3 Total content of [ La ] 2 O 3 +Y 2 O 3 +Gd 2 O 3 +Yb 2 O 3 +Lu 2 O 3 ]Is 13.5% or less. Total content [ La ] 2 O 3 +Y 2 O 3 +Gd 2 O 3 +Yb 2 O 3 +Lu 2 O 3 ]The upper limit of (b) is preferably 12%, and more preferably 11%, 10%, and 9% in this order. Total content [ La ] 2 O 3 +Y 2 O 3 +Gd 2 O 3 +Yb 2 O 3 +Lu 2 O 3 ]The lower limit of (b) is preferably 0%, and more preferably 0.5%, 1%, and 1.5% in this order.
In the optical glass of embodiment 4, nb 2 O 5 Content of (2) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Is 0.5 or less. Mass ratio [ Nb 2 O 5 /(Nb 2 O 5 +TiO 2 )]The upper limit of (b) is preferably 0.50, and more preferably 0.48, 0.47, 0.46, 0.45, and 0.44 in this order. Further, mass ratio [ Nb 2 O 5 /(Nb 2 O 5 +TiO 2 )]Preferably greater than 0, and the lower limits thereof are preferably 0.10, 0.20, 0.30 in this order.
When mass ratio [ Nb 2 O 5 /(Nb 2 O 5 +TiO 2 )]If too large, the specific gravity may increase. When mass ratio [ Nb 2 O 5 /(Nb 2 O 5 +TiO 2 )]If the dispersion is too small, the partial dispersion ratio Pg, F may increase. By mixing the mass ratio [ Nb 2 O 5 /(Nb 2 O 5 +TiO 2 )]Within the above range, the specific gravity can be reduced and the glass can be suppressedIncrease in raw material cost of glass.
In the optical glass of embodiment 4, the total content R 'O of MgO, caO, srO and BaO, the total content R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 The mass ratio of the total content of O [ R 'O/(R' O + R) 2 O)]0.71 to 1.0. Further, the mass ratio [ R 'O/(R' O + R) 2 O)]The lower limit of (b) is preferably 0.72, and more preferably 0.73 and 0.74 in this order. Mass ratio of [ R 'O/(R' O + R) 2 O)]The upper limit of (b) is preferably 0.99, and more preferably 0.98 and 0.97 in this order.
When the mass ratio is [ R 'O/(R' O + R) 2 O)]If too small, the refractive index nd may decrease. When the mass ratio is [ R 'O/(R' O + R) 2 O)]If it is too large, the thermal stability and meltability may be lowered, the dispersion may be lowered, and the specific gravity may be increased. By mixing the mass ratio of [ R 'O/(R' O + R) 2 O)]By setting the above range, an optical glass having a high refractive index can be obtained.
In the optical glass of embodiment 4, the mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO and BaO, [ (MgO + CaO)/R' O ], is 0.26 to 1.0. The lower limit of the mass ratio [ (MgO + CaO)/R' O ] is preferably 0.35, and more preferably 0.4, 0.45, and 0.5 in this order. The upper limit of the mass ratio [ (MgO + CaO)/R' O ] is preferably 0.98, and more preferably 0.96, 0.94, and 0.92 in this order.
Next, preferred embodiments of the content and ratio of the glass component in the optical glass of embodiment 4 will be described in detail below.
The optical glass of the 4 th embodiment preferably contains Li 2 O、Na 2 O and K 2 More preferably, the glass component contains 1 or more of Na in O 2 O, further preferably contains Li 2 O、Na 2 O and K 2 O。
By the optical glass containing Li 2 O、Na 2 O and K 2 1 or more glass components in O, thereby improving the meltability of the glass.
The optical glass of embodiment 4 preferably contains 1 or more glass components selected from MgO, caO, srO, and BaO, more preferably contains CaO, and still more preferably contains CaO and BaO.
By containing 1 or more glass components selected from MgO, caO, srO, and BaO, the optical glass can suppress a decrease in refractive index nd.
In the optical glass of embodiment 4, the mass ratio (CaO/R 'O) of the CaO content to the total content R' O of MgO, caO, srO and BaO and Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O (Na) 2 O/R 2 O) total of [ (CaO/R' O) + (Na) 2 O/R 2 O)]Preferably greater than 1.1, and the lower limits thereof are preferably 1.2, 1.3, 1.35, 1.4 in that order. [ (CaO/R' O) + (Na) 2 O/R 2 O)]The upper limit of (d) is preferably 1.9, and more preferably 1.85 and 1.8 in this order.
In the optical glass of embodiment 4, na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] 2 O/(R 2 O+R'O)]Preferably greater than 0, and the lower limits thereof are more preferably 0.1, 0.13, 0.15 in this order. Mass ratio [ Na 2 O/(R 2 O+R'O)]The upper limit of (b) is preferably 0.8, and more preferably 0.7, 0.6, and 0.5 in this order.
In the optical glass of embodiment 4, the content of CaO is equal to the total content R 2 The mass ratio of the total content of O and the total content R' O [ CaO/(R) 2 O+R'O)]Preferably 0.1 or more, and the lower limits thereof are, in order, more preferably 0.15, 0.18, 0.2. Mass ratio [ CaO/(R) 2 O+R'O)]The upper limit of (d) is preferably 0.95, and more preferably 0.90, 0.87, and 0.85 in this order.
In the optical glass of embodiment 4, nb 2 O 5 And TiO 2 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]The lower limit of (b) is preferably 5%, and more preferably 20%, 22%, 24%, and 25% in this order. Further, the total content [ Nb ] 2 O 5 +TiO 2 ]The upper limit of (b) is preferably 60%, and more preferably 50%, 45%, and 40% in this order.
In the optical glass of embodiment 4, the content and ratio of the glass components other than those described above can be set to the same values as those in embodiment 1.
Therefore, the optical glass of embodiment 4 may be:
the refractive index nd is 1.69 to 1.87,
the Abbe number is 24-36,
SiO 2 the content of (A) is 10-50%,
TiO 2 the content of (A) is less than 40%,
Nb 2 O 5 the content of (A) is 5-60%,
B 2 O 3 the content of (A) is less than 5%,
the content of BaO is less than 10 percent,
La 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 and Lu 2 O 3 The total content of (B) is 13.5% or less,
Nb 2 O 5 content of (b) and Nb 2 O 5 And TiO 2 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]The content of the acid-resistant acrylic resin is less than 0.5,
total content of MgO, caO, srO and BaO, R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 The mass ratio of the total content of O and the total content R 'O [ R' O/(R) 2 O+R'O)]Is in the range of 0.71 to 1.0,
the mass ratio of the total content of MgO and CaO to the total content R 'O [ (MgO + CaO)/R' O ] is 0.26 to 1.0,
Na 2 content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] 2 O/(R 2 O+R'O)]Is 0.1 or more.
The glass characteristics, the production of optical glass, the production of optical elements, and the like in embodiment 4 can be the same as those in embodiment 1.
[ examples ]
The present invention will be described in more detail below with reference to examples. However, the present invention is not limited to the embodiment shown in the examples.
(example 1)
Glass samples having glass compositions shown in tables 1-1 to 1-10 and tables 2-1 to 2-10 were prepared according to the following procedures, and various evaluations were performed.
[ production of optical glass ]
First, oxides, hydroxides, carbonates, and nitrates corresponding to the constituent components of the glass were prepared as raw materials, and the raw materials were weighed and blended so that the glass compositions of the obtained optical glasses were each as shown in tables 1-1 to 1-10, and the raw materials were sufficiently mixed. The prepared raw materials (batch) thus obtained are put into a platinum crucible, heated at 1350 to 1450 ℃ for 2 to 5 hours to prepare molten glass, homogenized by stirring, clarified, and then cast into a mold preheated to an appropriate temperature. The cast glass was heat-treated between the glass transition temperature Tg and a temperature 100 ℃ lower than Tg for 30 minutes, and left to cool to room temperature in a furnace to obtain a glass sample.
[ confirmation of glass composition ]
The contents of the respective glass components of the obtained glass samples were measured by inductively coupled plasma emission spectroscopy, and the glass samples were confirmed to have the respective compositions shown in tables 1-1 to 1-10.
[ measurement of optical Properties ]
The obtained glass sample was further annealed at around the glass transition temperature Tg for about 30 minutes to about 2 hours, and then cooled to room temperature in a furnace at a cooling rate of-30 ℃/hour to obtain an annealed sample. For the obtained annealed samples, refractive indices nd, ng, nF and nC, abbe number vd, partial dispersion ratio Pg, F, specific gravity, glass transition temperature Tg, λ 80, λ 70 and λ 5 were measured. The results are shown in tables 3-1 to 3-10.
(i) Refractive indices nd, ng, nF, nC and Abbe number vd
The refractive indices nd, ng, nF and nC of the above annealed samples were measured by a refractive index measuring method according to JIS specification JIS B7071-1, and Abbe number ν d was calculated according to the following formula.
νd＝(nd-1)/(nF-nC)
(ii) Partial dispersion ratio Pg, F
The partial dispersion ratios Pg, F were calculated from the following equation using the refractive indices ng, nF, nC at the g, F, and c lines.
Pg,F＝(ng-nF)/(nF-nC)
(iii) Deviation Δ Pg, F of partial dispersion ratio Pg, F
The partial dispersion ratios Pg, F and abbe number ν d were used, and calculated from the following equation.
ΔPg,F＝Pg,F+(0.0018×νd)-0.6483
(iv) Specific gravity of
Specific gravity was measured by the archimedes method.
(v) Glass transition temperature Tg
The glass transition temperature Tg was measured at a temperature increase rate of 10 ℃ per minute using a differential scanning calorimetry analyzer (DSC 3300 SA) manufactured by NETZSCH JAPAN.
(vi)λ80、λ70、λ5
The above annealed sample was processed to a thickness of 10mm, to have planes parallel to each other and optically polished, and the spectral transmittance in a wavelength range from 280nm to 700nm was measured. The spectral transmittance B/a was calculated by taking the intensity of light perpendicularly incident on one optically polished plane as intensity a and the intensity of light emitted from the other plane as intensity B. The spectral transmittance B/a was calculated by setting the wavelength at which the spectral transmittance became 80% to λ 80. The wavelength at which the spectral transmittance becomes 70% is λ 70, and the wavelength at which the spectral transmittance becomes 5% is λ 5. The spectral transmittance also includes reflection loss of light on the sample surface.
[ tables 1-1]
Figure BDA0001893169360000321
[ tables 1-2]
Figure BDA0001893169360000331
[ tables 1 to 3]
Figure BDA0001893169360000341
[ tables 1 to 4]
Figure BDA0001893169360000351
[ tables 1 to 5]
Figure BDA0001893169360000361
[ tables 1 to 6]
Figure BDA0001893169360000371
[ tables 1 to 7]
Figure BDA0001893169360000381
[ tables 1 to 8]
Figure BDA0001893169360000391
[ tables 1 to 9]
Figure BDA0001893169360000401
[ tables 1 to 10]
Figure BDA0001893169360000411
[ Table 2-1]
Figure BDA0001893169360000421
[ tables 2-2]
Figure BDA0001893169360000431
[ tables 2 to 3]
Figure BDA0001893169360000441
[ tables 2 to 4]
Figure BDA0001893169360000451
[ tables 2 to 5]
Figure BDA0001893169360000461
[ tables 2 to 6]
Figure BDA0001893169360000471
[ tables 2 to 7]
Figure BDA0001893169360000481
[ tables 2 to 8]
Figure BDA0001893169360000491
[ tables 2 to 9]
Figure BDA0001893169360000501
[ tables 2 to 10]
Figure BDA0001893169360000511
[ Table 3-1]
Figure BDA0001893169360000521
[ tables 3-2]
Figure BDA0001893169360000531
[ tables 3 to 3]
Figure BDA0001893169360000541
[ tables 3 to 4]
Figure BDA0001893169360000551
[ tables 3 to 5]
Figure BDA0001893169360000561
[ tables 3 to 6]
Figure BDA0001893169360000571
[ tables 3 to 7]
Figure BDA0001893169360000581
[ tables 3 to 8]
Figure BDA0001893169360000591
[ tables 3 to 9]
Figure BDA0001893169360000601
[ tables 3 to 10]
Figure BDA0001893169360000611
(example 2)
Using each optical glass produced in example 1, a lens blank was produced by a known method, and the lens blank was processed by a known method such as polishing to produce various lenses.
The optical lenses to be produced are various lenses such as a biconvex lens, a biconcave lens, a plano-convex lens, a plano-concave lens, a concave-convex lens, and a convex-concave lens.
The various lenses can be combined with lenses made of other types of optical glass, thereby correcting secondary chromatic aberration favorably.
Further, since glass has a low specific gravity, each lens has a smaller weight than a lens having the same optical characteristics and size, and is suitable for various image pickup apparatuses, particularly for an autofocus type image pickup apparatus because energy can be saved. In the same manner, prisms were produced using the various optical glasses produced in example 1.
The embodiments disclosed herein are illustrative and not restrictive in all respects. The scope of the present invention is indicated by the scope of the claims rather than the description above, and is intended to include all modifications within the scope and meaning equivalent to the scope of the claims.
For example, the optical glass according to one embodiment of the present invention can be produced by adjusting the composition described in the specification with respect to the above-mentioned exemplified glass composition.
It is to be understood that 2 or more items described as examples or preferred ranges in the specification can be arbitrarily combined.

Claims (603)

1. An optical glass having a refractive index nd of 1.69 to 1.87 and an Abbe's number vd of 24 to 36,
SiO 2 the content of (B) is 10 to 50 mass%,
TiO 2 the content of (B) is 40 mass% or less,
Nb 2 O 5 the content of (B) is 5 to 60 mass%,
the content of BaO is 10 mass% or less,
La 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 and Lu 2 O 3 The total content of (B) is 6.30% by mass or less,
Nb 2 O 5 content of (2) and Nb 2 O 5 And TiO 2 Mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Is a content of not more than 0.55,
comprising Li 2 O、Na 2 O and K 2 At least 1 glass component in O,
comprises 1 or more glass components selected from MgO, caO, srO and BaO,
the mass ratio of the content of CaO to the total content R 'O of MgO, caO, srO and BaO (CaO/R' O), and Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O (Na) 2 O/R 2 O) total of [ (CaO/R' O) + (Na) 2 O/R 2 O)]The content of the organic acid is more than 1.673,
the mass ratio of the total content of MgO and CaO to the total content R 'O [ (MgO + CaO)/R' O ] is 0.44 to 1.0.
2. The optical glass according to claim 1, wherein SiO is 2 The content of (B) is 12 mass% or more.
3. The optical glass according to claim 1, wherein SiO 2 The content of (b) is 15 mass% or more.
4. Root of herbaceous plantThe optical glass according to claim 1, wherein SiO is 2 The content of (b) is 17 mass% or more.
5. The optical glass according to claim 1, wherein SiO 2 The content of (b) is 20% by mass or more.
6. The optical glass according to claim 1, wherein SiO 2 The content of (b) is 45 mass% or less.
7. The optical glass according to claim 1, wherein SiO 2 The content of (B) is 40 mass% or less.
8. The optical glass according to claim 1, wherein SiO 2 The content of (b) is 37 mass% or less.
9. The optical glass according to claim 1, wherein SiO 2 The content of (b) is 35% by mass or less.
10. The optical glass according to claim 1, wherein TiO 2 The content of (b) is 35% by mass or less.
11. The optical glass according to claim 1, wherein TiO 2 The content of (b) is 30 mass% or less.
12. The optical glass according to claim 1, wherein TiO 2 The content of (B) is 28 mass% or less.
13. The optical glass according to claim 1, wherein TiO 2 The content of (b) is 25 mass% or less.
14. The optical glass according to claim 1, wherein TiO 2 The content of (b) is 0 mass% or more.
15. The optical glass according to claim 1, wherein TiO 2 The content of (b) is 5 mass% or more.
16. The optical glass according to claim 1, wherein TiO 2 The content of (b) is 8 mass% or more.
17. The optical glass according to claim 1, wherein TiO 2 The content of (b) is 10 mass% or more.
18. The optical glass according to claim 1, wherein TiO 2 The content of (B) is 0 mass%.
19. The optical glass of claim 1, wherein Nb 2 O 5 The content of (b) is 7 mass% or more.
20. The optical glass of claim 1, wherein Nb 2 O 5 The content of (b) is 8% by mass or more.
21. The optical glass of claim 1, wherein Nb 2 O 5 The content of (b) is 9 mass% or more.
22. The optical glass of claim 1, wherein Nb 2 O 5 The content of (b) is 10 mass% or more.
23. The optical glass of claim 1, wherein Nb 2 O 5 The content of (b) is 45 mass% or less.
24. The optical glass of claim 1, wherein Nb 2 O 5 The content of (B) is 40 mass% or less.
25. The optical glass of claim 1, wherein Nb 2 O 5 Is 35 substanceThe amount is less than% by weight.
26. The optical glass of claim 1, wherein Nb 2 O 5 The content of (b) is 30 mass% or less.
27. The optical glass according to claim 1, wherein the content of BaO is 9% by mass or less.
28. The optical glass according to claim 1, wherein the content of BaO is 8% by mass or less.
29. The optical glass according to claim 1, wherein the content of BaO is 7% by mass or less.
30. The optical glass according to claim 1, wherein the content of BaO is 0% by mass or more.
31. The optical glass according to claim 1, wherein the content of BaO is 1% by mass or more.
32. The optical glass according to claim 1, wherein the content of BaO is 2% by mass or more.
33. The optical glass according to claim 1, wherein the content of BaO is 3% by mass or more.
34. The optical glass according to claim 1, wherein the content of BaO is 3.5% by mass or more.
35. The optical glass according to claim 1, wherein the content of BaO is 0 mass%.
36. The optical glass according to claim 1, wherein La 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 And Lu 2 O 3 Total content of [ La ] 2 O 3 +Y 2 O 3 +Gd 2 O 3 +Yb 2 O 3 +Lu 2 O 3 ]Is 0 mass% or more.
37. The optical glass according to claim 1, wherein La 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 And Lu 2 O 3 Total content of [ La ] 2 O 3 +Y 2 O 3 +Gd 2 O 3 +Yb 2 O 3 +Lu 2 O 3 ]Is 0.5% by mass or more.
38. The optical glass according to claim 1, wherein La 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 And Lu 2 O 3 Total content of [ La ] 2 O 3 +Y 2 O 3 +Gd 2 O 3 +Yb 2 O 3 +Lu 2 O 3 ]Is 1% by mass or more.
39. The optical glass according to claim 1, wherein La 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 And Lu 2 O 3 Total content of [ La ] 2 O 3 +Y 2 O 3 +Gd 2 O 3 +Yb 2 O 3 +Lu 2 O 3 ]Is 1.5% by mass or more.
40. The optical glass of claim 1, wherein Nb 2 O 5 Content of (2) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Is 0.52 or less.
41. According to claim1 the optical glass of wherein Nb 2 O 5 Content of (2) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Is 0.50 or less.
42. The optical glass of claim 1, wherein Nb 2 O 5 Content of (2) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Greater than 0.
43. The optical glass of claim 1, wherein Nb 2 O 5 Content of (2) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Is 0.10 or more.
44. The optical glass of claim 1, wherein Nb 2 O 5 Content of (2) and Nb 2 O 5 And TiO 2 Mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Is 0.20 or more.
45. The optical glass of claim 1, wherein Nb 2 O 5 Content of (2) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Is 0.30 or more.
46. The optical glass according to claim 1, wherein Na is contained as a glass component 2 O。
47. The optical glass according to claim 1, wherein Na is contained as a glass component 2 O and K 2 O。
48. The optical glass according to claim 1, wherein CaO is contained as a glass component.
49. The optical glass according to claim 1, wherein CaO and BaO are contained as glass components.
50. The optical glass according to claim 1, wherein the mass ratio of the content of CaO to the total content R 'O of MgO, caO, srO, baO and ZnO (CaO/R' O) and Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O (Na) 2 O/R 2 O) total of [ (CaO/R' O) + (Na) 2 O/R 2 O)]Is 1.9 or less.
51. The optical glass according to claim 1, wherein the mass ratio of the content of CaO to the total content R 'O of MgO, caO, srO, baO and ZnO (CaO/R' O) and Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O (Na) 2 O/R 2 O) total of [ (CaO/R' O) + (Na) 2 O/R 2 O)]Is 1.85 or less.
52. The optical glass according to claim 1, wherein the mass ratio of the content of CaO to the total content R 'O of MgO, caO, srO, baO and ZnO (CaO/R' O) and Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O (Na) 2 O/R 2 O) total of [ (CaO/R' O) + (Na) 2 O/R 2 O)]Is 1.8 or less.
53. The optical glass according to claim 1, wherein the mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO, baO and ZnO [ (MgO + CaO)/R' O ] is 0.5 or more.
54. The optical glass according to claim 1, wherein the mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO, baO and ZnO [ (MgO + CaO)/R' O ] is 0.55 or more.
55. The optical glass according to claim 1, wherein the mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO, baO and ZnO [ (MgO + CaO)/R' O ] is 0.6 or more.
56. The optical glass according to claim 1, wherein the mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO, baO and ZnO [ (MgO + CaO)/R' O ] is 0.9 or less.
57. The optical glass according to claim 1, wherein the mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO, baO and ZnO [ (MgO + CaO)/R' O ] is 0.85 or less.
58. The optical glass according to claim 1, wherein the mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO, baO and ZnO [ (MgO + CaO)/R' O ] is 0.8 or less.
59. The optical glass according to claim 1, wherein a mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO, baO and ZnO [ (MgO + CaO)/R' O ] is 0.78 or less.
60. The optical glass according to claim 1, wherein Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] 2 O/(R 2 O+R'O)]Greater than 0.
61. The optical glass according to claim 1, wherein Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 O and the total content R' O of MgO, caO, srO and BaOMass ratio of amounts [ Na ] 2 O/(R 2 O+R'O)]Is 0.1 or more.
62. The optical glass according to claim 1, wherein Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] 2 O/(R 2 O+R'O)]Is 0.13 or more.
63. The optical glass according to claim 1, wherein Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] 2 O/(R 2 O+R'O)]Is 0.15 or more.
64. The optical glass according to claim 1, wherein Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] 2 O/(R 2 O+R'O)]Is 0.8 or less.
65. The optical glass according to claim 1, wherein Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] 2 O/(R 2 O+R'O)]Is 0.7 or less.
66. The optical glass according to claim 1, wherein Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] 2 O/(R 2 O+R'O)]Is 0.6 or less.
67. The light of claim 1Chemical glass, wherein, na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] 2 O/(R 2 O+R'O)]Is 0.5 or less.
68. The optical glass according to claim 1, wherein the content of CaO is in combination with Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ CaO/(R) 2 O+R'O)]Is 0.1 or more.
69. The optical glass according to claim 1, wherein the content of CaO is in combination with Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ CaO/(R) 2 O+R'O)]Is 0.15 or more.
70. The optical glass according to claim 1, wherein the content of CaO is in combination with Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ CaO/(R) 2 O+R'O)]Is 0.18 or more.
71. The optical glass according to claim 1, wherein the content of CaO is in combination with Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ CaO/(R) 2 O+R'O)]Is 0.2 or more.
72. The optical glass according to claim 1, wherein the content of CaO is in combination with Li 2 O、Na 2 O and K 2 Total content R of O 2 O and the total content R' O of MgO, caO, srO and BaO [ CaO/(R) ] 2 O+R'O)]Is 0.95 or less.
73. The optical glass according to claim 1, wherein the content of CaO is in combination with Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ CaO/(R) 2 O+R'O)]Is 0.90 or less.
74. The optical glass according to claim 1, wherein the content of CaO is in combination with Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ CaO/(R) 2 O+R'O)]Is 0.87 or less.
75. The optical glass according to claim 1, wherein the content of CaO is in combination with Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ CaO/(R) 2 O+R'O)]Is 0.85 or less.
76. The optical glass of claim 1, wherein Nb 2 O 5 And TiO 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 5% by mass or more.
77. The optical glass of claim 1, wherein Nb 2 O 5 And TiO 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 10% by mass or more.
78. The optical glass of claim 1, wherein Nb 2 O 5 And TiO 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 15% by mass or more.
79. The optical glass of claim 1, wherein Nb 2 O 5 And TiO 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 20% by mass or more.
80. The optical glass of claim 1, wherein Nb 2 O 5 And TiO 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 22% by mass or more.
81. The optical glass of claim 1, wherein Nb 2 O 5 And TiO 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 60% by mass or less.
82. The optical glass of claim 1, wherein Nb 2 O 5 And TiO 2 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 50% by mass or less.
83. The optical glass of claim 1, wherein Nb 2 O 5 And TiO 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 45% by mass or less.
84. The optical glass of claim 1, wherein Nb 2 O 5 And TiO 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 40% by mass or less.
85. The optical glass according to claim 1, wherein a total content R 'O of MgO, caO, srO and BaO and the total content R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Total content of O [ R 'O/(R' O + R) 2 O)]Is 0.50 or more.
86. The optical glass according to claim 1, wherein a total content R 'O of MgO, caO, srO and BaO and the total content R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Total content of O [ R 'O/(R' O + R) 2 O)]Is 0.55 or more.
87. The optical glass according to claim 1, wherein a total content R 'O of MgO, caO, srO and BaO and the total content R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Total content of O [ R 'O/(R' O + R) 2 O)]Is 0.60 or more.
88. The optical glass according to claim 1, wherein a total content R 'O of MgO, caO, srO and BaO and the total content R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Total content of O [ R 'O/(R' O + R) 2 O)]Is 0.65 or more.
89. The optical glass according to claim 1, wherein a total content R 'O of MgO, caO, srO and BaO and the total content R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Total content of O [ R 'O/(R' O + R) 2 O)]Is 0.99 or less.
90. The optical glass according to claim 1, wherein a total content R 'O of MgO, caO, srO and BaO and the total content R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Total content of O [ R 'O/(R' O + R) 2 O)]Is 0.98 or less.
91. The optical glass according to claim 1, wherein a total content R 'O of MgO, caO, srO and BaO and the total content R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Total content of O [ R 'O/(R' O + R) 2 O)]Is 0.97 or less.
92. The optical glass according to claim 1, wherein B is 2 O 3 The content of (b) is 5 mass% or less.
93. According to claim 1The optical glass described above, wherein B 2 O 3 The content of (B) is 4.5 mass% or less.
94. The optical glass according to claim 1, wherein B is 2 O 3 The content of (B) is 4.2 mass% or less.
95. The optical glass according to claim 1, wherein B is 2 O 3 The content of (B) is 4 mass% or less.
96. The optical glass according to claim 1, wherein B 2 O 3 The content of (b) is 0 mass% or more.
97. The optical glass according to claim 1, wherein B is 2 O 3 The content of (b) is 0.5% by mass or more.
98. The optical glass according to claim 1, wherein B is 2 O 3 The content of (b) is 0.7 mass% or more.
99. The optical glass according to claim 1, wherein B is 2 O 3 The content of (b) is 1 mass% or more.
100. The optical glass according to claim 1, wherein B is 2 O 3 The content of (B) is 0 mass%.
101. An optical glass, the refractive index nd is 1.69-1.87, the Abbe number vd is 24-36,
SiO 2 the content of (B) is 10 to 50 mass%,
TiO 2 the content of (B) is 40 mass% or less,
Nb 2 O 5 the content of (B) is 5 to 60 mass%,
the content of BaO is 10 mass% or less,
La 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 and Lu 2 O 3 The total content of (B) is 6.30 mass% or less, nb 2 O 5 Content of (2) and Nb 2 O 5 And TiO 2 Mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Is a content of not more than 0.55,
Na 2 content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] 2 O/(R 2 O+R'O)]Is greater than 0 and the content of the active ingredient,
the content of CaO and the total content R 2 A mass ratio of the total content of O and the total content R' O [ CaO/(R) 2 O+R'O)]Is a content of at least 0.1,
the mass ratio of the CaO content to the total content R 'O of MgO, caO, srO and BaO (CaO/R' O) and Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O (Na) 2 O/R 2 O) total of [ (CaO/R' O) + (Na) 2 O/R 2 O)]The content of the organic acid is more than 1.673,
the mass ratio of the total content of MgO and CaO to the total content R 'O [ (MgO + CaO)/R' O ] is 0.44 to 1.0.
102. The optical glass of claim 101 wherein SiO 2 The content of (B) is 12 mass% or more.
103. The optical glass of claim 101 wherein SiO 2 The content of (b) is 15 mass% or more.
104. The optical glass of claim 101 wherein SiO 2 The content of (b) is 17 mass% or more.
105. The optical glass of claim 101 wherein SiO 2 The content of (B) is 20 mass% or more.
106. The optical glass of claim 101 wherein SiO 2 The content of (b) is 45 mass% or less.
107. The optical glass of claim 101 wherein SiO 2 The content of (b) is 40 mass% or less.
108. The optical glass of claim 101 wherein SiO 2 The content of (b) is 37 mass% or less.
109. The optical glass of claim 101 wherein SiO 2 The content of (b) is 35% by mass or less.
110. The optical glass of claim 101 wherein the TiO is 2 The content of (b) is 35% by mass or less.
111. The optical glass of claim 101 wherein the TiO is 2 The content of (b) is 30% by mass or less.
112. The optical glass of claim 101 wherein the TiO is 2 The content of (B) is 28 mass% or less.
113. The optical glass of claim 101 wherein the TiO is 2 The content of (B) is 25 mass% or less.
114. The optical glass of claim 101 wherein the TiO is 2 The content of (b) is 0 mass% or more.
115. The optical glass of claim 101 wherein the TiO is 2 The content of (b) is 5 mass% or more.
116. The optical glass of claim 101 wherein the TiO is 2 The content of (b) is 8 mass% or more.
117. The optical glass of claim 101 wherein the TiO is 2 The content of (b) is 10 mass% or more.
118. The optical glass of claim 101 wherein the TiO is 2 The content of (B) is 0 mass%.
119. The optical glass of claim 101, wherein Nb 2 O 5 The content of (b) is 7 mass% or more.
120. The optical glass of claim 101, wherein Nb 2 O 5 The content of (b) is 8 mass% or more.
121. The optical glass of claim 101, wherein Nb 2 O 5 The content of (b) is 9 mass% or more.
122. The optical glass of claim 101, wherein Nb 2 O 5 The content of (b) is 10 mass% or more.
123. The optical glass of claim 101, wherein Nb 2 O 5 The content of (b) is 45 mass% or less.
124. The optical glass of claim 101, wherein Nb 2 O 5 The content of (b) is 40 mass% or less.
125. The optical glass of claim 101, wherein Nb 2 O 5 The content of (b) is 35% by mass or less.
126. The optical glass of claim 101, wherein Nb 2 O 5 The content of (b) is 30 mass% or less.
127. The optical glass according to claim 101, wherein a content of BaO is 9% by mass or less.
128. The optical glass according to claim 101, wherein a content of BaO is 8% by mass or less.
129. The optical glass according to claim 101, wherein a content of BaO is 7% by mass or less.
130. The optical glass according to claim 101, wherein a content of BaO is 0% by mass or more.
131. The optical glass according to claim 101, wherein a content of BaO is 1% by mass or more.
132. The optical glass according to claim 101, wherein a content of BaO is 2% by mass or more.
133. The optical glass according to claim 101, wherein a content of BaO is 3% by mass or more.
134. The optical glass according to claim 101, wherein a content of BaO is 3.5% by mass or more.
135. The optical glass according to claim 101, wherein a content of BaO is 0 mass%.
136. The optical glass of claim 101, wherein La 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 And Lu 2 O 3 Total content of [ La ] 2 O 3 +Y 2 O 3 +Gd 2 O 3 +Yb 2 O 3 +Lu 2 O 3 ]Is 0 mass% or more.
137. The optical glass of claim 101, wherein La 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 And Lu 2 O 3 Total content of [ La ] 2 O 3 +Y 2 O 3 +Gd 2 O 3 +Yb 2 O 3 +Lu 2 O 3 ]Is 0.5% by mass or more.
138. The optical glass of claim 101, wherein La 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 And Lu 2 O 3 Total content of [ La ] 2 O 3 +Y 2 O 3 +Gd 2 O 3 +Yb 2 O 3 +Lu 2 O 3 ]Is 1% by mass or more.
139. The optical glass of claim 101, wherein La 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 And Lu 2 O 3 Total content of [ La ] 2 O 3 +Y 2 O 3 +Gd 2 O 3 +Yb 2 O 3 +Lu 2 O 3 ]Is 1.5% by mass or more.
140. The optical glass of claim 101, wherein Nb 2 O 5 Content of (2) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Is 0.52 or less.
141. The optical glass of claim 101, wherein Nb 2 O 5 Content of (b) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Is 0.50 or less.
142. The optical glass of claim 101, wherein Nb 2 O 5 Content of (b) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Is greater than 0.
143. The optical glass of claim 101, wherein Nb 2 O 5 Content of (b) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Is 0.10 or more.
144. The optical glass of claim 101, wherein Nb 2 O 5 Content of (2) and Nb 2 O 5 And TiO 2 Mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Is 0.20 or more.
145. The optical glass of claim 101, wherein Nb 2 O 5 Content of (2) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Is 0.30 or more.
146. The optical glass of claim 101, wherein Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] 2 O/(R 2 O+R'O)]Is 0.1 or more.
147. The optical glass of claim 101, wherein Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 O and the combination of MgO, caO, srO and BaOThe mass ratio of the total content of the R' O [ Na ] 2 O/(R 2 O+R'O)]Is 0.13 or more.
148. The optical glass of claim 101, wherein Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] 2 O/(R 2 O+R'O)]Is 0.15 or more.
149. The optical glass of claim 101, wherein Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] 2 O/(R 2 O+R'O)]Is 0.8 or less.
150. The optical glass of claim 101, wherein Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] 2 O/(R 2 O+R'O)]Is 0.7 or less.
151. The optical glass of claim 101, wherein Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] O 2 O/(R 2 O+R'O)]Is 0.6 or less.
152. The optical glass of claim 101, wherein Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] O 2 O/(R 2 O+R'O)]Is 0.5 or less.
153. The optical glass of claim 101 wherein the content of CaO and Li is 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ CaO/(R) 2 O+R'O)]Is 0.15 or more.
154. The optical glass of claim 101 wherein the content of CaO is in combination with Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ CaO/(R) 2 O+R'O)]Is 0.18 or more.
155. The optical glass of claim 101 wherein the content of CaO is in combination with Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ CaO/(R) 2 O+R'O)]Is 0.2 or more.
156. The optical glass of claim 101 wherein the content of CaO is in combination with Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ CaO/(R) 2 O+R'O)]Is 0.95 or less.
157. The optical glass of claim 101 wherein the content of CaO is in combination with Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ CaO/(R) 2 O+R'O)]Is 0.90 or less.
158. The optical glass of claim 101 wherein the content of CaO is in combination with Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ CaO/(R) 2 O+R'O)]Is 0.87 or less.
159. The optical glass of claim 101 wherein the content of CaO is in combination with Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ CaO/(R) 2 O+R'O)]Is 0.85 or less.
160. The optical glass of claim 101, wherein the mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO and BaO, [ (MgO + CaO)/R' O ], is 0.5 or more.
161. The optical glass of claim 101, wherein the mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO and BaO, [ (MgO + CaO)/R' O ], is 0.55 or more.
162. The optical glass according to claim 101, wherein a mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO and BaO [ (MgO + CaO)/R' O ] is 0.6 or more.
163. The optical glass according to claim 101, wherein a mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO and BaO [ (MgO + CaO)/R' O ] is 0.9 or less.
164. The optical glass of claim 101, wherein the mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO and BaO, [ (MgO + CaO)/R' O ], is 0.85 or less.
165. The optical glass according to claim 101, wherein a mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO and BaO [ (MgO + CaO)/R' O ] is 0.8 or less.
166. The optical glass according to claim 101, wherein a mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO and BaO [ (MgO + CaO)/R' O ] is 0.78 or less.
167. The optical glass of claim 101 comprising Li 2 O、Na 2 O and K 2 1 or more glass components in O.
168. The optical glass of claim 101, wherein Na is contained as a glass component 2 O。
169. The optical glass of claim 101 wherein Li is contained as the glass component 2 O、Na 2 O and K 2 O。
170. The optical glass of claim 101 comprising 1 or more glass components selected from MgO, caO, srO, and BaO.
171. The optical glass of claim 101, wherein CaO is contained as the glass component.
172. The optical glass of claim 101 wherein CaO and BaO are contained as glass components.
173. The optical glass of claim 101, wherein the mass ratio of the content of CaO to the total content R 'O of MgO, caO, srO and BaO (CaO/R' O) and Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O (Na) 2 O/R 2 O) total of [ (CaO/R' O) + (Na) 2 O/R 2 O)]Is 1.9 or less.
174. The optical glass of claim 101, wherein the mass ratio of the content of CaO to the total content R 'O of MgO, caO, srO and BaO (CaO/R' O) and Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Quality of OQuantitative ratio (Na) 2 O/R 2 O) total of [ (CaO/R' O) + (Na) 2 O/R 2 O)]Is 1.85 or less.
175. The optical glass of claim 101, wherein the mass ratio of the content of CaO to the total content R 'O of MgO, caO, srO and BaO (CaO/R' O) and Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O (Na) 2 O/R 2 O) total of [ (CaO/R' O) + (Na) 2 O/R 2 O)]Is 1.8 or less.
176. The optical glass of claim 101 wherein the total content R 'O of MgO, caO, srO and BaO and the total content R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Total content of O [ R 'O/(R' O + R) 2 O)]Is 0.50 or more.
177. The optical glass of claim 101 wherein the total content R 'O of MgO, caO, srO and BaO and the total content R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Total content of O [ R 'O/(R' O + R) 2 O)]Is 0.55 or more.
178. The optical glass of claim 101 wherein the total content R 'O of MgO, caO, srO and BaO and the total content R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Total content of O [ R 'O/(R' O + R) 2 O)]Is 0.60 or more.
179. The optical glass of claim 101 wherein the total content R 'O of MgO, caO, srO and BaO and the total content R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Total content of O [ R 'O/(R' O + R) 2 O)]Is 0.65 or more.
180. According to claimThe optical glass according to claim 101, wherein a total content R 'O of MgO, caO, srO and BaO, the total content R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Total content of O [ R 'O/(R' O + R) 2 O)]Is 0.99 or less.
181. The optical glass of claim 101 wherein the total content R 'O of MgO, caO, srO and BaO and the total content R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Total content of O [ R 'O/(R' O + R) 2 O)]Is 0.98 or less.
182. The optical glass of claim 101 wherein the total content R 'O of MgO, caO, srO and BaO and the total content R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Total content of O [ R 'O/(R' O + R) 2 O)]Is 0.97 or less.
183. The optical glass of claim 101, wherein Nb 2 O 5 And TiO 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 5% by mass or more.
184. The optical glass of claim 101, wherein Nb 2 O 5 And TiO 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 20% by mass or more.
185. The optical glass of claim 101, wherein Nb 2 O 5 And TiO 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 22% by mass or more.
186. The optical glass of claim 101, wherein Nb 2 O 5 And TiO 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 24% by mass or more.
187. The optical glass of claim 101, wherein Nb 2 O 5 And TiO 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 25% by mass or more.
188. The optical glass of claim 101, wherein Nb 2 O 5 And TiO 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 60% by mass or less.
189. The optical glass of claim 101, wherein Nb 2 O 5 And TiO 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 50% by mass or less.
190. The optical glass of claim 101, wherein Nb 2 O 5 And TiO 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 45% by mass or less.
191. The optical glass of claim 101, wherein Nb 2 O 5 And TiO 2 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 40% by mass or less.
192. The optical glass of claim 101, wherein B is 2 O 3 The content of (b) is 5 mass% or less.
193. The optical glass of claim 101, wherein B is 2 O 3 The content of (b) is 4.5% by mass or less.
194. The optical glass of claim 101, wherein B is 2 O 3 The content of (b) is 4.2% by mass or less.
195. According to the rightThe optical glass of claim 101, wherein B 2 O 3 The content of (b) is 4% by mass or less.
196. The optical glass of claim 101, wherein B is 2 O 3 The content of (b) is 0 mass% or more.
197. The optical glass of claim 101, wherein B is 2 O 3 The content of (b) is 0.5% by mass or more.
198. The optical glass of claim 101, wherein B is 2 O 3 The content of (b) is 0.7 mass% or more.
199. The optical glass of claim 101, wherein B is 2 O 3 The content of (b) is 1 mass% or more.
200. The optical glass of claim 101, wherein B is 2 O 3 The content of (B) is 0 mass%.
201. An optical glass having a refractive index nd of 1.69 to 1.87 and an Abbe's number vd of 24 to 36,
SiO 2 the content of (B) is 10 to 50 mass%,
TiO 2 the content of (B) is 40 mass% or less,
Nb 2 O 5 the content of (B) is 5 to 60 mass%,
the content of BaO is 10 mass% or less,
La 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 and Lu 2 O 3 Has a total content of 6.30 mass% or less, and Nb 2 O 5 And TiO 2 The total content of (B) is 30% by mass or more,
Nb 2 O 5 content of (2) and Nb 2 O 5 And TiO 2 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Is a content of not more than 0.55,
total content of MgO, caO, srO and BaO, R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 A mass ratio of the total content of O and the total content R 'O [ R' O/(R) 2 O+R'O)]Is 0.7 to 1.0 percent,
the mass ratio of the content of CaO to the total content R 'O of MgO, caO, srO and BaO (CaO/R' O), and Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O (Na) 2 O/R 2 O) total of [ (CaO/R' O) + (Na) 2 O/R 2 O)]Is more than 1.673 of the total weight of the composition,
the mass ratio of the total content of MgO and CaO to the total content R 'O [ (MgO + CaO)/R' O ] is 0.26 to 1.0.
202. The optical glass of claim 201, wherein the SiO is 2 The content of (B) is 12 mass% or more.
203. The optical glass of claim 201, wherein the SiO is 2 The content of (b) is 15 mass% or more.
204. The optical glass of claim 201, wherein the SiO is 2 The content of (b) is 17 mass% or more.
205. The optical glass of claim 201 wherein SiO 2 The content of (B) is 20 mass% or more.
206. The optical glass of claim 201, wherein the SiO is 2 The content of (b) is 45 mass% or less.
207. The optical glass of claim 201, wherein the SiO is 2 The content of (B) is 40 mass% or less.
208. According to claim 201The optical glass, wherein SiO 2 The content of (b) is 37 mass% or less.
209. The optical glass of claim 201, wherein the SiO is 2 The content of (b) is 35% by mass or less.
210. The optical glass of claim 201 wherein the TiO is 2 The content of (b) is 35% by mass or less.
211. The optical glass of claim 201 wherein the TiO is 2 The content of (b) is 30% by mass or less.
212. The optical glass of claim 201 wherein the TiO is 2 The content of (B) is 28 mass% or less.
213. The optical glass of claim 201 wherein the TiO is 2 The content of (b) is 25 mass% or less.
214. The optical glass of claim 201 wherein the TiO is 2 The content of (b) is 0 mass% or more.
215. The optical glass of claim 201 wherein the TiO is 2 The content of (b) is 5 mass% or more.
216. The optical glass of claim 201 wherein the TiO is 2 The content of (b) is 8 mass% or more.
217. The optical glass of claim 201 wherein the TiO is 2 The content of (b) is 10 mass% or more.
218. The optical glass of claim 201 wherein the TiO is 2 The content of (B) is 0 mass%.
219. The optical glass of claim 201 wherein Nb 2 O 5 The content of (b) is 7 mass% or more.
220. The optical glass of claim 201, wherein Nb 2 O 5 The content of (b) is 8 mass% or more.
221. The optical glass of claim 201, wherein Nb 2 O 5 The content of (b) is 9 mass% or more.
222. The optical glass of claim 201, wherein Nb 2 O 5 The content of (b) is 10 mass% or more.
223. The optical glass of claim 201, wherein Nb 2 O 5 The content of (b) is 45 mass% or less.
224. The optical glass of claim 201, wherein Nb 2 O 5 The content of (B) is 40 mass% or less.
225. The optical glass of claim 201 wherein Nb 2 O 5 The content of (b) is 35% by mass or less.
226. The optical glass of claim 201, wherein Nb 2 O 5 The content of (b) is 30 mass% or less.
227. The optical glass of claim 201 wherein the content of BaO is 9% by mass or less.
228. The optical glass of claim 201 wherein the content of BaO is 8% by mass or less.
229. The optical glass of claim 201 wherein the content of BaO is 7% by mass or less.
230. The optical glass according to claim 201, wherein a content of BaO is 0% by mass or more.
231. The optical glass according to claim 201, wherein a content of BaO is 1% by mass or more.
232. The optical glass according to claim 201, wherein a content of BaO is 2% by mass or more.
233. The optical glass according to claim 201, wherein a content of BaO is 3% by mass or more.
234. The optical glass according to claim 201, wherein a content of BaO is 3.5% by mass or more.
235. The optical glass of claim 201, wherein the content of BaO is 0 mass%.
236. The optical glass of claim 201, wherein the La 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 And Lu 2 O 3 Total content of [ La ] 2 O 3 +Y 2 O 3 +Gd 2 O 3 +Yb 2 O 3 +Lu 2 O 3 ]Is 0 mass% or more.
237. The optical glass of claim 201, wherein the La 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 And Lu 2 O 3 Total content of [ La ] 2 O 3 +Y 2 O 3 +Gd 2 O 3 +Yb 2 O 3 +Lu 2 O 3 ]Is 0.5% by mass or more.
238. The optical glass of claim 201 wherein La 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 And Lu 2 O 3 Total content of [ La ] 2 O 3 +Y 2 O 3 +Gd 2 O 3 +Yb 2 O 3 +Lu 2 O 3 ]Is 1% by mass or more.
239. The optical glass of claim 201, wherein the La 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 And Lu 2 O 3 Total content of [ La ] 2 O 3 +Y 2 O 3 +Gd 2 O 3 +Yb 2 O 3 +Lu 2 O 3 ]Is 1.5% by mass or more.
240. The optical glass of claim 201, wherein Nb 2 O 5 And TiO 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 30.05% by mass or more.
241. The optical glass of claim 201, wherein Nb 2 O 5 And TiO 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 30.1% by mass or more.
242. The optical glass of claim 201, wherein Nb 2 O 5 And TiO 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 30.15% by mass or more.
243. The optical glass of claim 201 wherein Nb 2 O 5 And TiO 2 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 30.2% by mass or more.
244. The optical glass of claim 201 wherein Nb 2 O 5 And TiO 2 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 60% by mass or less.
245. The optical glass of claim 201, wherein Nb 2 O 5 And TiO 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 50% by mass or less.
246. The optical glass of claim 201, wherein Nb 2 O 5 And TiO 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 45 mass% or less.
247. The optical glass of claim 201 wherein Nb 2 O 5 And TiO 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 40% by mass or less.
248. The optical glass of claim 201, wherein Nb 2 O 5 Content of (b) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Is 0.50 or less.
249. The optical glass of claim 201, wherein Nb 2 O 5 Content of (2) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Greater than 0.
250. The optical glass of claim 201 wherein Nb 2 O 5 Content of (b) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Is 0.10 or more.
251. The optical glass of claim 201, wherein Nb 2 O 5 Content of (2) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Is 0.20 or more.
252. The optical glass of claim 201, wherein Nb 2 O 5 Content of (2) and Nb 2 O 5 And TiO 2 Mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Is 0.30 or more.
253. The optical glass of claim 201, wherein the total content R 'O of MgO, caO, srO and BaO, and the total content R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 The mass ratio of the total content of O [ R 'O/(R' O + R) 2 O)]Is 0.71 or more.
254. The optical glass of claim 201, wherein the total content R 'O of MgO, caO, srO and BaO, and the total content R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 The mass ratio of the total content of O [ R 'O/(R' O + R) 2 O)]Is 0.72 or more.
255. The optical glass of claim 201, wherein the total content R 'O of MgO, caO, srO and BaO, and the total content R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 The mass ratio of the total content of O [ R 'O/(R' O + R) 2 O)]Is 0.73 or more.
256. The optical glass of claim 201, wherein the total content R 'O of MgO, caO, srO and BaO, and the total content R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of total content of O [ R 'O/(R' O + R ] 2 O)]Is 0.74 or more.
257. The optical glass of claim 201, wherein the total content R 'O of MgO, caO, srO and BaO and the total content R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 The mass ratio of the total content of O [ R 'O/(R' O + R) 2 O)]Is 0.99 or less.
258. The optical glass of claim 201, wherein the total content R 'O of MgO, caO, srO and BaO, and the total content R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 The mass ratio of the total content of O [ R 'O/(R' O + R) 2 O)]Is 0.98 or less.
259. The optical glass of claim 201, wherein the total content R 'O of MgO, caO, srO and BaO, and the total content R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 The mass ratio of the total content of O [ R 'O/(R' O + R) 2 O)]Is 0.97 or less.
260. The optical glass of claim 201, wherein the mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO and BaO [ (MgO + CaO)/R' O ] is 0.35 or more.
261. The optical glass of claim 201, wherein the mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO and BaO [ (MgO + CaO)/R' O ] is 0.4 or more.
262. The optical glass of claim 201, wherein the mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO and BaO [ (MgO + CaO)/R' O ] is 0.45 or more.
263. The optical glass of claim 201, wherein the mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO and BaO [ (MgO + CaO)/R' O ] is 0.5 or more.
264. The optical glass of claim 201, wherein the mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO and BaO [ (MgO + CaO)/R' O ] is 0.98 or less.
265. The optical glass of claim 201, wherein the mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO and BaO [ (MgO + CaO)/R' O ] is 0.96 or less.
266. The optical glass of claim 201, wherein the mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO and BaO [ (MgO + CaO)/R' O ] is 0.94 or less.
267. The optical glass of claim 201, wherein the mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO and BaO [ (MgO + CaO)/R' O ] is 0.92 or less.
268. The optical glass of claim 201, comprising Li 2 O、Na 2 O and K 2 1 or more glass components in O.
269. The optical glass of claim 201, wherein Na is contained as a glass component 2 O。
270. The optical glass of claim 201, wherein Li is included as a glass component 2 O、Na 2 O and K 2 O。
271. An optical glass as defined in claim 201 comprising 1 or more glass components selected from MgO, caO, srO and BaO.
272. The optical glass of claim 201 wherein CaO is included as a glass component.
273. The optical glass of claim 201, wherein CaO and BaO are contained as glass components.
274. The optical glass of claim 201, wherein the mass ratio of the content of CaO to the total content R 'O of MgO, caO, srO and BaO (CaO/R' O) and Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O (Na) 2 O/R 2 O) total of [ (CaO/R' O) + (Na) 2 O/R 2 O)]Is 1.9 or less.
275. The optical glass of claim 201, wherein the mass ratio of the content of CaO to the total content R 'O of MgO, caO, srO and BaO (CaO/R' O) and Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O (Na) 2 O/R 2 O) total of [ (CaO/R' O) + (Na) 2 O/R 2 O)]Is 1.85 or less.
276. The optical glass of claim 201, wherein the mass ratio of the content of CaO to the total content R 'O of MgO, caO, srO and BaO (CaO/R' O) and Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O (Na) 2 O/R 2 O) total of [ (CaO/R' O) + (Na) 2 O/R 2 O)]Is 1.8 or less.
277. The optical glass of claim 201, wherein Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] 2 O/(R 2 O+R'O)]Greater than 0.
278. The optical glass of claim 201, wherein Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] O 2 O/(R 2 O+R'O)]Is 0.1 or more.
279. The optical glass of claim 201, wherein Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] 2 O/(R 2 O+R'O)]Is 0.13 or more.
280. The optical glass of claim 201, wherein Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] O 2 O/(R 2 O+R'O)]Is 0.15 or more.
281. The optical glass of claim 201, wherein Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] 2 O/(R 2 O+R'O)]Is 0.8 or less.
282. The optical glass of claim 201, wherein Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] O 2 O/(R 2 O+R'O)]Is 0.7 or less.
283. The optical glass of claim 201, wherein Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] 2 O/(R 2 O+R'O)]Is 0.6 or less.
284. The optical glass of claim 201, wherein Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] 2 O/(R 2 O+R'O)]Is 0.5 or less.
285. The optical glass of claim 201 wherein the content of CaO is in combination with Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ CaO/(R) 2 O+R'O)]Is 0.1 or more.
286. The optical glass of claim 201 wherein the content of CaO is in combination with Li 2 O、Na 2 O and K 2 Total content R of O 2 O and the total content R' O of MgO, caO, srO and BaO [ CaO/(R) ] 2 O+R'O)]Is 0.15 or more.
287. The optical glass of claim 201 wherein the content of CaO is in combination with Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ CaO/(R) 2 O+R'O)]Is 0.18 or more.
288. The optical glass of claim 201 wherein the content of CaO is in combination with Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ CaO/(R) 2 O+R'O)]Is 0.2 or more.
289. The optical glass of claim 201 wherein the content of CaO is in combination with Li 2 O、Na 2 O and K 2 Total content R of O 2 O and the total content R' O of MgO, caO, srO and BaO [ CaO/(R) ] 2 O+R'O)]Is 0.95 or less.
290. The optical glass of claim 201 wherein the content of CaO is in combination with Li 2 O、Na 2 O and K 2 Total content R of O 2 O and the total content R' O of MgO, caO, srO and BaO [ CaO/(R) ] 2 O+R'O)]Is 0.90 or less.
291. The optical glass of claim 201 wherein the content of CaO is in combination with Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ CaO/(R) 2 O+R'O)]Is 0.87 or less.
292. The optical glass of claim 201 wherein the content of CaO is in combination with Li 2 O、Na 2 O and K 2 Total content R of O 2 O and the total content R' O of MgO, caO, srO and BaO [ CaO/(R) ] 2 O+R'O)]Is 0.85 or less.
293. The optical glass of claim 201, wherein B is 2 O 3 The content of (b) is 5 mass% or less.
294. The optical glass of claim 201, wherein B is 2 O 3 The content of (B) is 4.5 mass% or less.
295. The optical glass of claim 201, wherein B is 2 O 3 The content of (B) is 4.2 mass% or less.
296. The optical glass of claim 201, wherein B is 2 O 3 The content of (B) is 4 mass% or less.
297. The optical glass of claim 201, wherein B is 2 O 3 The content of (b) is 0 mass% or more.
298. The optical glass of claim 201, wherein B is 2 O 3 The content of (b) is 0.5 mass% or more.
299. The optical glass of claim 201, wherein B is 2 O 3 The content of (b) is 0.7 mass% or more.
300. The optical glass of claim 201, wherein B is 2 O 3 The content of (b) is 1 mass% or more.
301. The optical glass of claim 201, wherein B is 2 O 3 The content of (B) is 0 mass%.
302. An optical glass, the refractive index nd is 1.69-1.87, the Abbe number vd is 24-36,
SiO 2 the content of (B) is 10 to 50 mass%,
TiO 2 the content of (B) is 40 mass% or less,
Nb 2 O 5 the content of (B) is 5 to 60 mass%,
B 2 O 3 the content of (B) is 5% by mass or less,
the content of BaO is 10 mass% or less,
La 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 and Lu 2 O 3 Has a total content of 6.30 mass% or less, and Nb 2 O 5 Content of (2) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]The content of the acid-resistant acrylic resin is less than 0.5,
total content of MgO, caO, srO and BaO, R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 A mass ratio of the total content of O and the total content R 'O [ R' O/(R) 2 O+R'O)]Is in the range of 0.71 to 1.0,
the mass ratio of the content of CaO to the total content R 'O of MgO, caO, srO and BaO (CaO/R' O), and Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O (Na) 2 O/R 2 O) total of [ (CaO/R' O) + (Na) 2 O/R 2 O)]The content of the organic acid is more than 1.673,
the mass ratio of the total content of MgO and CaO to the total content R 'O [ (MgO + CaO)/R' O ] is 0.26 to 1.0.
303. The optical glass of claim 302 wherein the SiO is 2 The content of (B) is 12 mass% or more.
304. The optical glass of claim 302 wherein SiO 2 The content of (b) is 15 mass% or more.
305. The optical glass of claim 302 wherein the SiO is 2 The content of (b) is 17 mass% or more.
306. The optical glass of claim 302 wherein the SiO is 2 The content of (B) is 20 mass% or more.
307. The optical glass of claim 302 wherein the SiO is 2 The content of (b) is 45 mass% or less.
308. The optical glass of claim 302 wherein the SiO is 2 The content of (B) is 40 mass% or less.
309. According to the claimsThe optical glass of claim 302, wherein SiO 2 The content of (b) is 37 mass% or less.
310. The optical glass of claim 302 wherein the SiO is 2 The content of (b) is 35% by mass or less.
311. The optical glass of claim 302 wherein the TiO is 2 The content of (b) is 35% by mass or less.
312. The optical glass of claim 302 wherein the TiO is 2 The content of (b) is 30 mass% or less.
313. The optical glass of claim 302 wherein the TiO is 2 The content of (B) is 28 mass% or less.
314. The optical glass of claim 302 wherein the TiO is 2 The content of (B) is 25 mass% or less.
315. The optical glass of claim 302 wherein the TiO is 2 The content of (b) is 0 mass% or more.
316. The optical glass of claim 302 wherein the TiO is 2 The content of (b) is 5% by mass or more.
317. The optical glass of claim 302 wherein the TiO is 2 The content of (b) is 8 mass% or more.
318. The optical glass of claim 302 wherein the TiO is 2 The content of (b) is 10 mass% or more.
319. The optical glass of claim 302 wherein the TiO is 2 The content of (B) is 0 mass%.
320. The optical glass of claim 302, wherein Nb 2 O 5 The content of (b) is 7 mass% or more.
321. The optical glass of claim 302, wherein Nb 2 O 5 The content of (b) is 8 mass% or more.
322. The optical glass of claim 302, wherein Nb 2 O 5 The content of (b) is 9 mass% or more.
323. The optical glass of claim 302, wherein Nb 2 O 5 The content of (b) is 10 mass% or more.
324. The optical glass of claim 302, wherein Nb 2 O 5 The content of (b) is 45 mass% or less.
325. The optical glass of claim 302 wherein Nb 2 O 5 The content of (B) is 40 mass% or less.
326. The optical glass of claim 302, wherein Nb 2 O 5 The content of (b) is 35% by mass or less.
327. The optical glass of claim 302, wherein Nb 2 O 5 The content of (b) is 30 mass% or less.
328. The optical glass of claim 302, wherein B is 2 O 3 The content of (B) is 4.5 mass% or less.
329. The optical glass of claim 302, wherein B is 2 O 3 The content of (b) is 4.2% by mass or less.
330. The optical glass of claim 302, wherein B is 2 O 3 The content of (B) is 4 mass% or less.
331. The optical glass of claim 302, wherein B is 2 O 3 The content of (b) is 0 mass% or more.
332. The optical glass of claim 302, wherein B is 2 O 3 The content of (b) is 0.5 mass% or more.
333. The optical glass of claim 302, wherein B is 2 O 3 The content of (b) is 0.7 mass% or more.
334. The optical glass of claim 302, wherein B is 2 O 3 The content of (b) is 1 mass% or more.
335. The optical glass of claim 302, wherein B is 2 O 3 The content of (B) is 0 mass%.
336. The optical glass as defined in claim 302, wherein the content of BaO is 9% by mass or less.
337. The optical glass of claim 302 wherein the content of BaO is 8% by mass or less.
338. The optical glass of claim 302 wherein the content of BaO is 7% by mass or less.
339. The optical glass as claimed in claim 302, wherein the content of BaO is 0% by mass or more.
340. The optical glass as claimed in claim 302, wherein the content of BaO is 1% by mass or more.
341. The optical glass as defined in claim 302, wherein the content of BaO is 2% by mass or more.
342. The optical glass as claimed in claim 302, wherein the content of BaO is 3% by mass or more.
343. The optical glass as defined in claim 302, wherein the content of BaO is 3.5% by mass or more.
344. The optical glass of claim 302 wherein the content of BaO is 0 mass%.
345. The optical glass of claim 302, wherein La 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 And Lu 2 O 3 Total content of [ La ] 2 O 3 +Y 2 O 3 +Gd 2 O 3 +Yb 2 O 3 +Lu 2 O 3 ]Is 0 mass% or more.
346. The optical glass of claim 302, wherein the La 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 And Lu 2 O 3 Total content of [ La ] 2 O 3 +Y 2 O 3 +Gd 2 O 3 +Yb 2 O 3 +Lu 2 O 3 ]Is 0.5% by mass or more.
347. The optical glass of claim 302, wherein the La 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 And Lu 2 O 3 Total content of [ La ] 2 O 3 +Y 2 O 3 +Gd 2 O 3 +Yb 2 O 3 +Lu 2 O 3 ]Is 1% by mass or more.
348. The optical glass of claim 302, wherein the La 2 O 3 、Y 2 O 3 、Gd 2 O 3 、Yb 2 O 3 And Lu 2 O 3 Total content of [ La ] 2 O 3 +Y 2 O 3 +Gd 2 O 3 +Yb 2 O 3 +Lu 2 O 3 ]Is 1.5% by mass or more.
349. The optical glass of claim 302, wherein Nb 2 O 5 Content of (2) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Is 0.50 or less.
350. The optical glass of claim 302, wherein Nb 2 O 5 Content of (2) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Is 0.48 or less.
351. The optical glass of claim 302, wherein Nb 2 O 5 Content of (2) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Is 0.47 or less.
352. The optical glass of claim 302, wherein Nb 2 O 5 Content of (2) and Nb 2 O 5 And TiO 2 Mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Is 0.46 or less.
353. The optical glass of claim 302 wherein Nb 2 O 5 Content of (b) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Is 0.45 or less.
354. The optical glass of claim 302, wherein Nb 2 O 5 Content of (2) and Nb 2 O 5 And TiO 2 Mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Is 0.44 or less.
355. The optical glass of claim 302 wherein Nb 2 O 5 Content of (2) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Greater than 0.
356. The optical glass of claim 302, wherein Nb 2 O 5 Content of (2) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Is 0.10 or more.
357. The optical glass of claim 302, wherein Nb 2 O 5 Content of (2) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Is 0.20 or more.
358. The optical glass of claim 302, wherein Nb 2 O 5 Content of (2) and Nb 2 O 5 And TiO 2 The mass ratio of the total content of [ Nb ] 2 O 5 /(Nb 2 O 5 +TiO 2 )]Is 0.30 or more.
359. The optical glass of claim 302, which isWherein the total content R 'O of MgO, caO, srO and BaO, the total content R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of total content of O [ R 'O/(R' O + R ] 2 O)]Is 0.72 or more.
360. The optical glass of claim 302 wherein the combined content R 'O of MgO, caO, srO and BaO and the combined content R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 The mass ratio of the total content of O [ R 'O/(R' O + R) 2 O)]Is 0.73 or more.
361. The optical glass of claim 302 wherein the combined content R 'O of MgO, caO, srO and BaO and the combined content R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 The mass ratio of the total content of O [ R 'O/(R' O + R) 2 O)]Is 0.74 or more.
362. The optical glass of claim 302 wherein the combined content R 'O of MgO, caO, srO and BaO and the combined content R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 The mass ratio of the total content of O [ R 'O/(R' O + R) 2 O)]Is 0.99 or less.
363. The optical glass of claim 302 wherein the combined content R 'O of MgO, caO, srO and BaO and the combined content R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 The mass ratio of the total content of O [ R 'O/(R' O + R) 2 O)]Is 0.98 or less.
364. The optical glass of claim 302, wherein the combined content R 'O of MgO, caO, srO and BaO and the combined content R' O and Li 2 O、Na 2 O and K 2 Total content R of O 2 The mass ratio of the total content of O [ R 'O/(R' O + R) 2 O)]Is 0.97 or less.
365. The optical glass of claim 302, wherein the mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO and BaO [ (MgO + CaO)/R' O ] is 0.35 or more.
366. The optical glass of claim 302, wherein the mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO and BaO [ (MgO + CaO)/R' O ] is 0.4 or more.
367. The optical glass of claim 302, wherein the mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO and BaO [ (MgO + CaO)/R' O ] is 0.45 or more.
368. The optical glass of claim 302, wherein the mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO and BaO [ (MgO + CaO)/R' O ] is 0.5 or more.
369. The optical glass of claim 302 wherein the mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO and BaO [ (MgO + CaO)/R' O ] is 0.98 or less.
370. The optical glass of claim 302 wherein the mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO and BaO [ (MgO + CaO)/R' O ] is 0.96 or less.
371. The optical glass of claim 302 wherein the mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO and BaO [ (MgO + CaO)/R' O ] is 0.94 or less.
372. The optical glass of claim 302 wherein the mass ratio of the total content of MgO and CaO to the total content R 'O of MgO, caO, srO and BaO [ (MgO + CaO)/R' O ] is 0.92 or less.
373. The optical glass of claim 302, comprising Li 2 O、Na 2 O and K 2 1 or more glass components in O.
374. The optical glass of claim 302, wherein Na is included as a glass component 2 O。
375. The optical glass of claim 302 wherein, as a glass component, li is contained 2 O、Na 2 O and K 2 O。
376. The optical glass of claim 302 comprising 1 or more glass components selected from MgO, caO, srO, and BaO.
377. The optical glass of claim 302 wherein CaO is included as a glass component.
378. The optical glass of claim 302 wherein CaO and BaO are included as glass components.
379. The optical glass of claim 302 wherein the mass ratio of the content of CaO to the total content R 'O of MgO, caO, srO, baO, and ZnO (CaO/R' O) and Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O (Na) 2 O/R 2 O) total of [ (CaO/R' O) + (Na) 2 O/R 2 O)]Is 1.9 or less.
380. The optical glass of claim 302 wherein the mass ratio of the content of CaO to the total content R 'O of MgO, caO, srO, baO and ZnO (CaO/R' O) and Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O (Na) 2 O/R 2 O) total of [ (CaO/R' O) + (Na) 2 O/R 2 O)]Is 1.85 or less.
381. The optical glass of claim 302 wherein the mass ratio of the content of CaO to the total content R 'O of MgO, caO, srO, baO and ZnO (CaO/R' O) and Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O (Na) 2 O/R 2 O) total of [ (CaO/R' O) + (Na) 2 O/R 2 O)]Is 1.8 or less.
382. The optical glass of claim 302, wherein Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] 2 O/(R 2 O+R'O)]Greater than 0.
383. The optical glass of claim 302, wherein Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] O 2 O/(R 2 O+R'O)]Is 0.1 or more.
384. The optical glass of claim 302, wherein Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] 2 O/(R 2 O+R'O)]Is 0.13 or more.
385. The optical glass of claim 302, wherein Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] 2 O/(R 2 O+R'O)]Is 0.15 or more.
386. The optical glass of claim 302, wherein Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] 2 O/(R 2 O+R'O)]Is 0.8 or less.
387. The optical glass of claim 302, wherein Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] 2 O/(R 2 O+R'O)]Is 0.7 or less.
388. The optical glass of claim 302, wherein Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] 2 O/(R 2 O+R'O)]Is 0.6 or less.
389. The optical glass of claim 302, wherein Na 2 Content of O and Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ Na ] 2 O/(R 2 O+R'O)]Is 0.5 or less.
390. The optical glass of claim 302 wherein the content of CaO is in combination with Li 2 O、Na 2 O and K 2 Total content R of O 2 O and the total content R' O of MgO, caO, srO and BaO [ CaO/(R) ] 2 O+R'O)]Is 0.1 or more.
391. The optical glass of claim 302 wherein the content of CaO and Li is 2 O、Na 2 O and K 2 Total content R of O 2 O and the combination of MgO, caO, srO and BaOThe mass ratio of the total content of the R' O content [ CaO/(R) 2 O+R'O)]Is 0.15 or more.
392. The optical glass of claim 302 wherein the content of CaO is in combination with Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ CaO/(R) 2 O+R'O)]Is 0.18 or more.
393. The optical glass of claim 302 wherein the content of CaO is in combination with Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ CaO/(R) 2 O+R'O)]Is 0.2 or more.
394. The optical glass of claim 302 wherein the content of CaO is in combination with Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ CaO/(R) 2 O+R'O)]Is 0.95 or less.
395. The optical glass of claim 302 wherein the content of CaO is in combination with Li 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ CaO/(R) 2 O+R'O)]Is 0.90 or less.
396. The optical glass of claim 302 wherein the content of CaO and Li is 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ CaO/(R) 2 O+R'O)]Is 0.87 or less.
397. The optical glass of claim 302 wherein the content of CaO and Li is 2 O、Na 2 O and K 2 Total content R of O 2 Mass ratio of O to the total content R' O of MgO, caO, srO and BaO [ CaO/(R) 2 O+R'O)]Is 0.85 or less.
398. The optical glass of claim 302 wherein Nb 2 O 5 And TiO 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 5% by mass or more.
399. The optical glass of claim 302, wherein Nb 2 O 5 And TiO 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 20% by mass or more.
400. The optical glass of claim 302, wherein Nb 2 O 5 And TiO 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 22% by mass or more.
401. The optical glass of claim 302, wherein Nb 2 O 5 And TiO 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 24% by mass or more.
402. The optical glass of claim 302, wherein Nb 2 O 5 And TiO 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 25% by mass or more.
403. The optical glass of claim 302, wherein Nb 2 O 5 And TiO 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 60% by mass or less.
404. The optical glass of claim 302, wherein Nb 2 O 5 And TiO 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 50% by mass or less.
405. The optical glass of claim 302, wherein Nb 2 O 5 And TiO 2 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 45% by mass or less.
406. The optical glass of claim 302, wherein Nb 2 O 5 And TiO 2 2 Total content of [ Nb ] 2 O 5 +TiO 2 ]Is 40% by mass or less.
407. The optical glass of any of claims 1, 101, 201, and 302, wherein P is 2 O 5 The content of (b) is 5 mass% or less.
408. The optical glass of any of claims 1, 101, 201, and 302, wherein P is 2 O 5 The content of (B) is 4.5 mass% or less.
409. The optical glass of any of claims 1, 101, 201, and 302, wherein P is 2 O 5 The content of (b) is 4% by mass or less.
410. The optical glass of any of claims 1, 101, 201, and 302, wherein P is 2 O 5 The content of (B) is 3.5 mass% or less.
411. The optical glass of any of claims 1, 101, 201, and 302, wherein P is 2 O 5 The content of (b) is 0 mass% or more.
412. The optical glass of any of claims 1, 101, 201, and 302, wherein P is 2 O 5 The content of (b) is 0.5% by mass or more.
413. Claims 1, 101, 201 and 302, wherein P is 2 O 5 The content of (b) is 1% by mass or more.
414. The optical glass of any of claims 1, 101, 201, and 302, wherein P is 2 O 5 The content of (B) is 1.5 mass% or more.
415. The optical glass of any of claims 1, 101, 201, and 302, wherein P is 2 O 5 The content of (B) is 0 mass%.
416. The optical glass of any of claims 1, 101, 201, and 302, wherein Al is 2 O 3 The content of (B) is 3 mass% or less.
417. The optical glass of any of claims 1, 101, 201, and 302, wherein Al is 2 O 3 The content of (B) is 2 mass% or less.
418. The optical glass of any of claims 1, 101, 201, and 302, wherein Al is 2 O 3 The content of (B) is 1.5 mass% or less.
419. The optical glass of any of claims 1, 101, 201, and 302, wherein Al is 2 O 3 The content of (b) is 1 mass% or less.
420. The optical glass of any of claims 1, 101, 201, and 302, wherein Al is 2 O 3 The content of (B) is 0 mass%.
421. The optical glass of any of claims 1, 101, 201, and 302, wherein ZrO 2 The content of (b) is 3 mass% or more.
422. Claims 1, 101, 201 and 302 wherein ZrO 2 The content of (b) is 4 mass% or more.
423. The optical glass of any of claims 1, 101, 201, and 302, wherein ZrO 2 The content of (b) is 5 mass% or more.
424. The optical glass of any of claims 1, 101, 201, and 302, wherein ZrO 2 The content of (b) is 6 mass% or more.
425. The optical glass of any of claims 1, 101, 201, and 302, wherein ZrO 2 The content of (b) is 15 mass% or less.
426. The optical glass of any of claims 1, 101, 201, and 302, wherein ZrO 2 The content of (b) is 13 mass% or less.
427. The optical glass of any of claims 1, 101, 201, and 302, wherein ZrO 2 The content of (b) is 11 mass% or less.
428. The optical glass of any of claims 1, 101, 201, and 302, wherein ZrO 2 The content of (B) is 10 mass% or less.
429. The optical glass of any of claims 1, 101, 201, and 302, wherein WO 3 The content of (b) is 5 mass% or less.
430. The optical glass of any of claims 1, 101, 201, and 302, wherein WO 3 The content of (b) is 3% by mass or less.
431. The optical glass of any of claims 1, 101, 201, and 302, wherein WO 3 Is contained in an amount of 1 mass% or moreAnd (5) the following.
432. The optical glass of any of claims 1, 101, 201, and 302, wherein WO 3 The content of (B) is 0 mass%.
433. The optical glass of any of claims 1, 101, 201, and 302, wherein Bi 2 O 3 The content of (b) is 5 mass% or less.
434. The optical glass of any of claims 1, 101, 201, and 302, wherein Bi 2 O 3 The content of (B) is 3 mass% or less.
435. The optical glass of any of claims 1, 101, 201, and 302, wherein Bi 2 O 3 The content of (b) is 1 mass% or less.
436. The optical glass of any of claims 1, 101, 201, and 302, wherein Bi 2 O 3 The content of (B) is 0 mass%.
437. The optical glass of any of claims 1, 101, 201, and 302, wherein Li 2 The content of O is 10 mass% or less.
438. The optical glass of any of claims 1, 101, 201, and 302, wherein Li 2 The content of O is 8 mass% or less.
439. The optical glass of any of claims 1, 101, 201, and 302, wherein Li 2 The content of O is 6 mass% or less.
440. The optical glass of any of claims 1, 101, 201, and 302, wherein Li 2 The content of O is 5 mass% or less.
441. The optical glass of any of claims 1, 101, 201, and 302, wherein Li 2 The content of O is 0 mass% or more.
442. The optical glass of any of claims 1, 101, 201, and 302 wherein Na 2 The content of O is 15 mass% or less.
443. The optical glass of any of claims 1, 101, 201, and 302, wherein Na 2 The content of O is 12 mass% or less.
444. The optical glass of any of claims 1, 101, 201, and 302 wherein Na 2 The content of O is 10 mass% or less.
445. The optical glass of any of claims 1, 101, 201, and 302, wherein Na 2 The content of O is 8 mass% or less.
446. The optical glass of any of claims 1, 101, 201, and 302 wherein Na 2 The content of O is 1 mass% or more.
447. The optical glass of any of claims 1, 101, 201, and 302 wherein Na 2 The content of O is 2 mass% or more.
448. The optical glass of any of claims 1, 101, 201, and 302, wherein Na 2 The content of O is 3 mass% or more.
449. The optical glass of any of claims 1, 101, 201, and 302 wherein Na 2 The content of O is 4 mass% or more.
450. Claims 1, 101, 201 and 302, wherein K is 2 The content of O is 15 mass% or less.
451. The optical glass of any of claims 1, 101, 201, and 302, wherein K is 2 The content of O is 12 mass% or less.
452. The optical glass of any of claims 1, 101, 201, and 302, wherein K is 2 The content of O is 10 mass% or less.
453. The optical glass of any of claims 1, 101, 201, and 302, wherein K is 2 The content of O is 8 mass% or less.
454. The optical glass of any of claims 1, 101, 201, and 302, wherein K is 2 The content of O is 0.05 mass% or more.
455. The optical glass of any of claims 1, 101, 201, and 302, wherein K is 2 The content of O is 0.1 mass% or more.
456. The optical glass of any of claims 1, 101, 201, and 302, wherein K is 2 The content of O is 0.15 mass% or more.
457. The optical glass of any of claims 1, 101, 201, and 302, wherein Li 2 O、Na 2 O and K 2 Total content R of O 2 O is 1.05 mass% or more.
458. The optical glass of any of claims 1, 101, 201, and 302, wherein Li 2 O、Na 2 O and K 2 Total content R of O 2 O is 1.5 mass% or more.
459. Root of herbaceous plantThe optical glass of any of claims 1, 101, 201, and 302, wherein Li 2 O、Na 2 O and K 2 Total content R of O 2 O is 2 mass% or more.
460. The optical glass of any of claims 1, 101, 201, and 302, wherein Li 2 O、Na 2 O and K 2 Total content R of O 2 O is 2.5 mass% or more.
461. The optical glass of any of claims 1, 101, 201, and 302, wherein Li 2 O、Na 2 O and K 2 Total content R of O 2 O is 15 mass% or less.
462. The optical glass of any of claims 1, 101, 201, and 302, wherein Li 2 O、Na 2 O and K 2 Total content R of O 2 O is 13 mass% or less.
463. The optical glass of any of claims 1, 101, 201, and 302, wherein Li 2 O、Na 2 O and K 2 Total content R of O 2 O is 11 mass% or less.
464. The optical glass of any of claims 1, 101, 201, and 302, wherein Li 2 O、Na 2 O and K 2 Total content R of O 2 O is 10 mass% or less.
465. The optical glass of any of claims 1, 101, 201, and 302, wherein Cs 2 The content of O is 10 mass% or less.
466. The optical glass of any of claims 1, 101, 201, and 302, wherein Cs 2 The content of O is 5 mass% or less.
467. The optical glass of any of claims 1, 101, 201, and 302, wherein Cs 2 The content of O is 3 mass% or less.
468. The optical glass of any of claims 1, 101, 201, and 302, wherein Cs 2 The content of O is 1 mass% or less.
469. The optical glass of any of claims 1, 101, 201, and 302, wherein Cs 2 The content of O is 0 mass% or more.
470. The optical glass of any one of claims 1, 101, 201, and 302, wherein the MgO content is 25 mass% or less.
471. The optical glass of any one of claims 1, 101, 201, and 302, wherein the MgO content is 23 mass% or less.
472. The optical glass of any one of claims 1, 101, 201, and 302, wherein the MgO content is 21 mass% or less.
473. The optical glass of any one of claims 1, 101, 201, and 302, wherein the content of MgO is 20 mass% or less.
474. The optical glass according to any one of claims 1, 101, 201 and 302, wherein a content of MgO is 0 mass% or more.
475. The optical glass of any one of claims 1, 101, 201, and 302, wherein the content of CaO is 25 mass% or less.
476. The optical glass of any one of claims 1, 101, 201, and 302, wherein the content of CaO is 23 mass% or less.
477. The optical glass of any one of claims 1, 101, 201, and 302, wherein the content of CaO is 21 mass% or less.
478. The optical glass of any one of claims 1, 101, 201, and 302, wherein the content of CaO is 20 mass% or less.
479. The optical glass according to any one of claims 1, 101, 201 and 302, wherein a content of CaO is 0 mass% or more.
480. The optical glass of any one of claims 1, 101, 201, and 302 wherein the SrO content is 20 mass% or less.
481. The optical glass according to any one of claims 1, 101, 201 and 302, wherein a content of SrO is 10% by mass or less.
482. The optical glass of any one of claims 1, 101, 201, and 302 wherein the SrO content is 5% by mass or less.
483. The optical glass of any one of claims 1, 101, 201, and 302 wherein the SrO content is 3% or less by mass.
484. The optical glass according to any one of claims 1, 101, 201 and 302, wherein a content of SrO is 0% by mass or more.
485. The optical glass according to any one of claims 1, 101, 201 and 302, wherein a total content of MgO and CaO [ MgO + CaO ] is 0 mass% or more.
486. The optical glass of any one of claims 1, 101, 201 and 302 wherein the total content of MgO and CaO [ MgO + CaO ] is 5 mass% or more.
487. The optical glass of any one of claims 1, 101, 201 and 302 wherein the total content of MgO and CaO [ MgO + CaO ] is 8 mass% or more.
488. The optical glass according to any one of claims 1, 101, 201 and 302, wherein a total content of MgO and CaO [ MgO + CaO ] is 10 mass% or more.
489. The optical glass of any one of claims 1, 101, 201, and 302, wherein the total content of MgO and CaO [ MgO + CaO ] is 30 mass% or less.
490. The optical glass according to any one of claims 1, 101, 201 and 302, wherein a total content [ MgO + CaO ] of MgO and CaO is 28 mass% or less.
491. The optical glass of any of claims 1, 101, 201, and 302, wherein the total content of MgO and CaO [ MgO + CaO ] is 25% by mass or less.
492. The optical glass of any one of claims 1, 101, 201, and 302, wherein the total content of MgO and CaO [ MgO + CaO ] is 22 mass% or less.
493. The optical glass according to any one of claims 1, 101, 201 and 302, wherein a total content R' O of MgO, caO, srO and BaO is 30% by mass or less.
494. The optical glass of any one of claims 1, 101, 201, and 302 wherein a total content R' O of MgO, caO, srO, and BaO is 28% by mass or less.
495. The optical glass according to any one of claims 1, 101, 201 and 302, wherein a total content R' O of MgO, caO, srO and BaO is 25% by mass or less.
496. The optical glass of any one of claims 1, 101, 201, and 302 wherein a total content R' O of MgO, caO, srO, and BaO is 22% by mass or less.
497. The optical glass according to any one of claims 1, 101, 201 and 302, wherein a total content R' O of MgO, caO, srO and BaO is 0% by mass or more.
498. The optical glass according to any one of claims 1, 101, 201 and 302, wherein a total content R' O of MgO, caO, srO and BaO is 5% by mass or more.
499. The optical glass according to any one of claims 1, 101, 201 and 302, wherein a total content R' O of MgO, caO, srO and BaO is 8% by mass or more.
500. The optical glass according to any one of claims 1, 101, 201 and 302, wherein a total content R' O of MgO, caO, srO and BaO is 10% by mass or more.
501. The optical glass of any one of claims 1, 101, 201, and 302 wherein the combined content R' O of MgO, caO, srO, and BaO is 0 mass%.
502. The optical glass according to any one of claims 1, 101, 201 and 302, wherein the content of ZnO is 20% by mass or less.
503. The optical glass according to any one of claims 1, 101, 201 and 302, wherein a content of ZnO is 10% by mass or less.
504. The optical glass of any of claims 1, 101, 201, and 302 wherein the ZnO content is 5% by mass or less.
505. The optical glass of any of claims 1, 101, 201, and 302 wherein the content of ZnO is 3 mass% or less.
506. The optical glass according to any one of claims 1, 101, 201 and 302, wherein a content of ZnO is 0% by mass or more.
507. The optical glass of any of claims 1, 101, 201, and 302, wherein La 2 O 3 The content of (b) is 15 mass% or less.
508. The optical glass of any of claims 1, 101, 201, and 302, wherein La 2 O 3 The content of (B) is 14.5 mass% or less.
509. The optical glass of any of claims 1, 101, 201, and 302, wherein La 2 O 3 The content of (B) is 14 mass% or less.
510. The optical glass of any of claims 1, 101, 201, and 302, wherein La 2 O 3 The content of (B) is 13.5 mass% or less.
511. The optical glass of any of claims 1, 101, 201, and 302, wherein La 2 O 3 The content of (b) is 0 mass% or more.
512. The optical glass of any of claims 1, 101, 201, and 302, wherein La 2 O 3 The content of (b) is 1 mass% or more.
513. The optical glass of any of claims 1, 101, 201, and 302, wherein La 2 O 3 In an amount ofIs 1.5% by mass or more.
514. The optical glass of any of claims 1, 101, 201, and 302, wherein La 2 O 3 The content of (B) is 2 mass%.
515. The optical glass of any of claims 1, 101, 201, and 302, wherein La 2 O 3 The content of (B) is 0 mass%.
516. The optical glass of any of claims 1, 101, 201, and 302, wherein Y is 2 O 3 The content of (B) is 20 mass% or less.
517. The optical glass of any of claims 1, 101, 201, and 302, wherein Y is 2 O 3 The content of (B) is 10 mass% or less.
518. The optical glass of any of claims 1, 101, 201, and 302, wherein Y is 2 O 3 The content of (b) is 5 mass% or less.
519. The optical glass of any of claims 1, 101, 201, and 302, wherein Y is 2 O 3 The content of (B) is 3 mass% or less.
520. The optical glass of any of claims 1, 101, 201, and 302, wherein Y is 2 O 3 The content of (b) is 0 mass% or more.
521. The optical glass of any of claims 1, 101, 201, and 302, wherein Ta 2 O 5 The content of (B) is 20 mass% or less.
522. The optical glass of any of claims 1, 101, 201, and 302, wherein Ta 2 O 5 The content of (b) is 10 mass% or less.
523. The optical glass of any of claims 1, 101, 201, and 302, wherein Ta 2 O 5 The content of (b) is 5% by mass or less.
524. The optical glass of any of claims 1, 101, 201, and 302, wherein Ta 2 O 5 The content of (B) is 3 mass% or less.
525. The optical glass of any of claims 1, 101, 201, and 302, wherein Ta 2 O 5 The content of (b) is 0 mass% or more.
526. The optical glass of any of claims 1, 101, 201, and 302, wherein Sc 2 O 3 The content of (B) is 2 mass% or less.
527. The optical glass of any of claims 1, 101, 201, and 302, wherein Sc 2 O 3 The content of (b) is 0 mass% or more.
528. The optical glass of any of claims 1, 101, 201, and 302 wherein HfO 2 The content of (B) is 2 mass% or less.
529. The optical glass of any of claims 1, 101, 201, and 302 wherein HfO 2 The content of (b) is 0 mass% or more.
530. The optical glass of any one of claims 1, 101, 201, and 302, wherein Lu 2 O 3 The content of (B) is 2 mass% or less.
531. The optical glass of any of claims 1, 101, 201, and 302, wherein Lu 2 O 3 The content of (b) is 0 mass% or more.
532. The optical glass of any of claims 1, 101, 201, and 302, wherein GeO 2 The content of (B) is 2 mass% or less.
533. The optical glass of any of claims 1, 101, 201, and 302, wherein GeO 2 The content of (b) is 0 mass% or more.
534. The optical glass of any of claims 1, 101, 201, and 302, wherein Gd is 2 O 3 The content of (B) is 2 mass% or less.
535. The optical glass of any of claims 1, 101, 201, and 302, wherein Gd is 2 O 3 The content of (b) is 0 mass% or more.
536. The optical glass of any of claims 1, 101, 201, and 302, wherein Yb 2 O 3 The content of (b) is 2 mass% or less.
537. The optical glass of any of claims 1, 101, 201, and 302, wherein Yb 2 O 3 The content of (b) is 0 mass% or more.
538. The optical glass of any of claims 1, 101, 201, and 302, wherein SiO 2 、Nb 2 O 5 、TiO 2 、BaO、B 2 O 3 、P 2 O 5 、Al 2 O 3 、ZrO 2 、WO 3 、Bi 2 O 3 、Li 2 O、Na 2 O、K 2 O、Cs2O、MgO、CaO、SrO、ZnO、La 2 O 3 、Y 2 O 3 、Ta 2 O 5 、Sc 2 O 3 、HfO 2 、Lu 2 O 3 、GeO 2 、Gd 2 O 3 And Yb 2 O 3 The total content of (b) is more than 95 mass%.
539. The optical glass of any of claims 1, 101, 201, and 302, wherein SiO 2 、Nb 2 O 5 、TiO 2 、BaO、B 2 O 3 、P 2 O 5 、Al 2 O 3 、ZrO 2 、WO 3 、Bi 2 O 3 、Li 2 O、Na 2 O、K 2 O、Cs2O、MgO、CaO、SrO、ZnO、La 2 O 3 、Y 2 O 3 、Ta 2 O 5 、Sc 2 O 3 、HfO 2 、Lu 2 O 3 、GeO 2 、Gd 2 O 3 And Yb 2 O 3 The total content of (B) is more than 98 mass%.
540. The optical glass of any of claims 1, 101, 201, and 302, wherein SiO 2 、Nb 2 O 5 、TiO 2 、BaO、B 2 O 3 、P 2 O 5 、Al 2 O 3 、ZrO 2 、WO 3 、Bi 2 O 3 、Li 2 O、Na 2 O、K 2 O、Cs2O、MgO、CaO、SrO、ZnO、La 2 O 3 、Y 2 O 3 、Ta 2 O 5 、Sc 2 O 3 、HfO 2 、Lu 2 O 3 、GeO 2 、Gd 2 O 3 And Yb 2 O 3 The total content of (B) is more than 99 mass%.
541. The optical glass of any of claims 1, 101, 201, and 302, wherein SiO 2 、Nb 2 O 5 、TiO 2 、BaO、B 2 O 3 、P 2 O 5 、Al 2 O 3 、ZrO 2 、WO 3 、Bi 2 O 3 、Li 2 O、Na 2 O、K 2 O、Cs2O、MgO、CaO、SrO、ZnO、La 2 O 3 、Y 2 O 3 、Ta 2 O 5 、Sc 2 O 3 、HfO 2 、Lu 2 O 3 、GeO 2 、Gd 2 O 3 And Yb 2 O 3 The total content of (B) is more than 99.5 mass%.
542. The optical glass of any of claims 1, 101, 201, and 302, wherein Sb 2 O 3 And CeO 2 The total amount of (a), i.e., the external addition amount, is 0 mass% or more and less than 1 mass%.
543. The optical glass of any of claims 1, 101, 201, and 302, wherein Sb 2 O 3 And CeO 2 The total amount of (3), i.e., the external addition amount, is 0 mass% or more and 0.5 mass% or less.
544. An optical glass as in any one of claims 1, 101, 201, and 302 wherein PbO, cdO, thO 2 The content of (B) is 0-0.1% by mass.
545. An optical glass as in any one of claims 1, 101, 201, and 302 wherein PbO, cdO, thO 2 The content of (B) is 0-0.05 mass%.
546. An optical glass as in any one of claims 1, 101, 201, and 302 wherein PbO, cdO, thO 2 The content of (B) is 0-0.01% by mass.
547. An optical glass as in any one of claims 1, 101, 201, and 302 that is substantially free of PbO, cdO, and ThO 2 。
548. The optical glass of any of claims 1, 101, 201, and 302, wherein As 2 O 3 The content of (B) is 0 to 0.1 mass%.
549. The optical glass of any of claims 1, 101, 201, and 302, wherein As 2 O 3 The content of (B) is 0 to 0.05 mass%.
550. The optical glass of any of claims 1, 101, 201, and 302, wherein As 2 O 3 The content of (B) is 0 to 0.01 mass%.
551. The optical glass of any one of claims 1, 101, 201, and 302 that is substantially free of As 2 O 3 。
552. The optical glass of any of claims 1, 101, 201, and 302 wherein the contents of Cu, co, ni, fe, cr, eu, nd, er, V are each less than 100 mass ppm.
553. The optical glass of any of claims 1, 101, 201, and 302 wherein the contents of Cu, co, ni, fe, cr, eu, nd, er, V are each 0-80 mass ppm.
554. The optical glass of any of claims 1, 101, 201, and 302 wherein the contents of Cu, co, ni, fe, cr, eu, nd, er, V are each 0 to 50 mass ppm.
555. The optical glass of any one of claims 1, 101, 201, and 302, which comprises substantially no Cu, co, ni, fe, cr, eu, nd, er, and V.
556. The optical glass of any of claims 1, 101, 201, and 302, wherein Ga 2 O 3 、TeO 2 、TbO 2 The content of (B) is 0-0.1% by mass.
557. The optical glass of any one of claims 1, 101, 201, and 302,wherein Ga 2 O 3 、TeO 2 、TbO 2 The content of (A) is 0 to 0.05 mass%.
558. The optical glass of any of claims 1, 101, 201, and 302, wherein Ga 2 O 3 、TeO 2 、TbO 2 The content of (B) is 0-0.01% by mass.
559. The optical glass of any of claims 1, 101, 201, and 302, wherein Ga 2 O 3 、TeO 2 、TbO 2 The content of (B) is 0-0.005% by mass.
560. The optical glass of any of claims 1, 101, 201, and 302, wherein Ga 2 O 3 、TeO 2 、TbO 2 The content of (B) is 0-0.001 wt%.
561. The optical glass of any one of claims 1, 101, 201, and 302, which comprises substantially no Ga 2 O 3 、TeO 2 And TbO 2 。
562. An optical glass as defined in any one of claims 1, 101, 201 and 302 having a refractive index nd in the range of from 1.70 to 1.865.
563. The optical glass of any of claims 1, 101, 201, and 302 having a refractive index nd from 1.75 to 1.860.
564. The optical glass of any one of claims 1, 101, 201, and 302 having an abbe number vd in the range of from 25 to 35.
565. The optical glass of any one of claims 1, 101, 201, and 302 having an abbe number vd ranging from 26 to 34.
566. The optical glass of any one of claims 1, 101, 201, and 302 having a specific gravity of 3.95 or less.
567. The optical glass of any one of claims 1, 101, 201, and 302 having a specific gravity of 3.80 or less.
568. The optical glass of any of claims 1, 101, 201, and 302 having a specific gravity of 3.70 or less.
569. The optical glass of any one of claims 1, 101, 201, and 302 having a specific gravity of 3.67 or less.
570. The optical glass of any one of claims 1, 101, 201, and 302 having a specific gravity of 3.65 or less.
571. The optical glass of any one of claims 1, 101, 201, and 302 which has a specific gravity of 2.60 or greater.
572. The optical glass of any one of claims 1, 101, 201, and 302 having a partial dispersion ratio Pg, F of 0.6095 or less.
573. The optical glass of any one of claims 1, 101, 201, and 302 having a partial dispersion ratio Pg, F of 0.6050 or less.
574. The optical glass of any one of claims 1, 101, 201, and 302 having a partial dispersion ratio Pg, F of 0.6030 or less.
575. The optical glass of any of claims 1, 101, 201, and 302 having a partial dispersion ratio Pg, F of 0.6025 or less.
576. The optical glass of any one of claims 1, 101, 201, and 302 having a partial dispersion ratio Pg, F of 0.6020 or less.
577. The optical glass of any one of claims 1, 101, 201, and 302 having a partial dispersion ratio Pg, F of 0.5800 or greater.
578. The optical glass of any one of claims 1, 101, 201, and 302 having a deviation Δ Pg, F of 0.0150 or less.
579. The optical glass of any one of claims 1, 101, 201, and 302 having a deviation Δ Pg, F of 0.0100 or less.
580. The optical glass of any one of claims 1, 101, 201, and 302 having a deviation Δ Pg, F of 0.0070 or less.
581. The optical glass of any of claims 1, 101, 201, and 302 having a deviation Δ Pg, F of 0.0065 or less.
582. The optical glass of any of claims 1, 101, 201, and 302, which has a deviation Δ Pg, F of-0.0050 or greater.
583. The optical glass of any one of claims 1, 101, 201, and 302 having a glass transition temperature of 740 ℃ or less.
584. The optical glass of any one of claims 1, 101, 201, and 302 having a glass transition temperature of 700 ℃ or less.
585. The optical glass of any one of claims 1, 101, 201, and 302 having a glass transition temperature of 690 ℃ or less.
586. The optical glass of any one of claims 1, 101, 201, and 302, having a glass transition temperature of 685 ℃ or less.
587. The optical glass of any one of claims 1, 101, 201, and 302 having a glass transition temperature of 680 ℃ or less.
588. The optical glass of any one of claims 1, 101, 201, and 302 having a glass transition temperature of 430 ℃ or greater.
589. The optical glass of any one of claims 1, 101, 201, and 302 having a glass transition temperature of 460 ℃ or greater.
590. The optical glass of any one of claims 1, 101, 201, and 302 having a glass transition temperature of 490 ℃ or greater.
591. The optical glass of any one of claims 1, 101, 201, and 302 having a glass transition temperature of 520 ℃ or greater.
592. The optical glass of any of claims 1, 101, 201, and 302 wherein a glass sample having a thickness of 10.0mm ± 0.1mm has a λ 80 of 520nm or less over the wavelength range of 200-700 nm.
593. The optical glass of any of claims 1, 101, 201, and 302, wherein a glass sample having a thickness of 10.0mm ± 0.1mm has a λ 80 of 500nm or less over the wavelength range of 200-700 nm.
594. The optical glass of any of claims 1, 101, 201, and 302 wherein a glass sample having a thickness of 10.0mm ± 0.1mm has a λ 80 of 475nm or less over the wavelength range of 200-700 nm.
595. The optical glass of any one of claims 1, 101, 201, and 302 wherein a glass sample having a thickness of 10.0mm ± 0.1mm has a λ 80 of 455nm or less over the wavelength range of 200-700 nm.
596. The optical glass of any of claims 1, 101, 201, and 302 wherein a glass sample having a thickness of 10.0mm ± 0.1mm has a λ 70 of 500nm or less over the wavelength range of 200-700 nm.
597. The optical glass of any of claims 1, 101, 201, and 302 wherein a glass sample having a thickness of 10.0mm ± 0.1mm has a λ 70 of 480nm or less over the wavelength range of 200-700 nm.
598. The optical glass of any of claims 1, 101, 201, and 302, wherein a λ 70 of a glass sample having a thickness of 10.0mm ± 0.1mm at a wavelength in the range of 200-700nm is 465nm or less.
599. The optical glass of any of claims 1, 101, 201, and 302 wherein a glass sample having a thickness of 10.0mm ± 0.1mm has a λ 70 of 450nm or less over the wavelength range of 200-700 nm.
600. The optical glass of any of claims 1, 101, 201, and 302 wherein a glass sample having a thickness of 10.0mm ± 0.1mm has a λ 5 of 390nm or less over the wavelength range of 200-700 nm.
601. The optical glass of any of claims 1, 101, 201, and 302 wherein a glass sample having a thickness of 10.0mm ± 0.1mm has a λ 5 of 380nm or less at a wavelength in the range of 200-700 nm.
602. The optical glass of any of claims 1, 101, 201, and 302, wherein a λ 5 of a glass sample having a thickness of 10.0mm ± 0.1mm is 370nm or less at a wavelength in the range of 200-700 nm.
603. An optical element formed from the optical glass of any one of claims 1 to 602.
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