CN103864293A - Optical glass, preformed blank and optical element - Google Patents
Optical glass, preformed blank and optical element Download PDFInfo
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- CN103864293A CN103864293A CN201310662516.8A CN201310662516A CN103864293A CN 103864293 A CN103864293 A CN 103864293A CN 201310662516 A CN201310662516 A CN 201310662516A CN 103864293 A CN103864293 A CN 103864293A
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Abstract
The invention provides optical glass, a preformed blank and an optical element. An object of the invention is to provide a low-cost approach to obtain optical glass which has a refractive index and an Abbe number within an expected range and a small partial chromatic dispersion rate and an optical element. The solution is the optical glass which contains, by mass%, 5.0 to 60.0% of the SiO2 component and 20.0% or less of the Ta2O5 component, and the relationship between the partial chromatic dispersion rate (theta g, F) and the Abbe number (vd) satisfies (-0.00160*vd plus 0.63460)</=(theta g, F)</=(-0.00421*vd plus 0.72070) when vd is no more than 25 and (-0.00250*vd plus 0.65710)</=(theta g, F)</=(-0.00421*vd plus 0.72070) when vd is larger than 25.
Description
Technical field
The present invention relates to opticglass, preform and optical element.
Background technology
Although it varies the optical system of digital camera, pick up camera etc., all with the bleeding that is called as aberration.This aberration is classified as monochromatic aberration and chromatic aberation, and especially chromatic aberation depends on the material behavior of the lens that use in optical system strongly.
Conventionally, chromatic aberation is by combining the convex lens of low dispersion and the concavees lens of high dispersion are proofreaied and correct, but only can proofread and correct the aberration of red area and green area by this combination, aberration that can residual blue region.The aberration of this blue region not eliminating is called to secondary spectrum.For proofreading and correct secondary spectrum, need to consider the optical design of the trend of the g ray (435.835nm) of blue region.Now, as the index of the optical characteristics of having in mind in optical design, use partial dispersion than (θ g, F).In above-mentioned combination in the optical system of the lens of low dispersion and the lens of high dispersion, lens place by low dispersion side is used partial dispersion than large optical material, use partial dispersion than little optical material at the lens place of high dispersion side, can proofread and correct well secondary spectrum.
Partial dispersion is represented by following formula (1) than (θ g, F).
θg，F＝（n
g-nF）/（nF-nC）······（1）
In opticglass, in the partial dispersion of partial dispersion that represents short wavelength territory than (θ g, F) and Abbe number (ν
d) between, there is the relation of substantial linear.The straight line that represents this relation adopt partial dispersion than for the longitudinal axis, adopt on the rectangular coordinates that Abbe number is transverse axis, use by the partial dispersion of NSL7 and PBM2 when the map straight line of 2 connections obtaining of Abbe number represent, be called as reference line (with reference to Fig. 1).Although according to the difference of each opticglass manufacturers and difference, each company defines with almost identical slope and intercept as the reference glass of the benchmark of reference line.(NSL7 and PBM2 are the opticglass that Obara Corporation manufactures, the Abbe number (ν of PBM2
d) be 36.3, partial dispersion is the Abbe number (ν of 0.5828, NSL7 than (θ g, F)
d) be 60.5, partial dispersion is 0.5436 than (θ g, F).）
Herein, as partial dispersion than little glass, such opticglass shown in known for example patent documentation 1～3.
Prior art document
Patent documentation
Patent documentation 1: TOHKEMY 2008-297198 communique
Patent documentation 2: No. 2001/072650 brochure of International Publication
Patent documentation 3: Japanese kokai publication hei 10-265238 communique
Summary of the invention
the problem that invention will solve
But disclosed glass is due to specific refractory power (n in patent documentation 1～3
d) low and Abbe number (ν
d) Gao Yin but low dispersion, be therefore unaccommodated as the lens of proofreading and correct above-mentioned secondary spectrum., seek to have concurrently little partial dispersion ratio, opticglass with the optical characteristics of high refractive index and high dispersion.
In addition, in order to reduce the material cost of opticglass, expect that the raw material cost of the each composition that forms opticglass is cheap as far as possible.In addition, in order to reduce the manufacturing cost of opticglass, expect that the meltability of raw material is high, melt with lower temperature.But the glass composition of recording in patent documentation 1～3 hardly fully should right these requirements.
The present invention puts in view of the above problems and carries out, and its object is, obtain more at an easy rate in specific refractory power and the Abbe number scope in expecting and partial dispersion than little opticglass, the preform that has used it and optical element.
for the scheme of dealing with problems
The inventor etc., in order to address the above problem, have carried out going deep into experimental study repeatedly, found that, by being used in combination SiO
2composition and Ta
2o
5composition, and adjust their content, the partial dispersion of glass is than (θ g, F) and Abbe number (ν thus
d) between there is the relation of expectation, and, by reducing Ta
2o
5the content of composition, thus the material cost of glass is minimized, and has completed thus the present invention.Particularly, the invention provides following content.
(1) opticglass, wherein, by mass%, contains 5.0～60.0% SiO
2composition, Ta
2o
5the content of composition is below 20.0%, and partial dispersion is than (θ g, F) and Abbe number (ν
d) between at ν
d≤ 25 scope meets (0.00160 × ν
d+ 0.63460)≤(θ g, F)≤(0.00421 × ν
d+ 0.72070) relation, at ν
dthe scope of > 25 meets (0.00250 × ν
d+ 0.65710)≤(θ g, F)≤(0.00421 × ν
d+ 0.72070) relation.
(2), according to the opticglass (1) described, wherein, be by mass%:
ZrO
2composition 0～25.0%
Nb
2o
5 composition 0～60.0%.
(3) according to the opticglass (1) or (2) described, wherein, mass ratio ZrO
2/ Nb
2o
5be more than 0.01.
(4) according to the opticglass described in any one in (1)～(3), wherein, quality and ZrO
2+ Nb
2o
5be 25.0～65.0%.
(5) according to the opticglass described in any one in (1)～(4), wherein, mass ratio Nb
2o
5/ (Ta
2o
5+ SiO
2) be more than 0.30 and below 3.00.
(6), according to the opticglass described in any one in (1)～(5), wherein, be by mass%:
TiO
2composition 0～20.0%
Li
2o composition 0～25.0%.
(7) according to the opticglass described in any one in (1)～(6), wherein, mass ratio (Nb
2o
5+ TiO
2)/(Ta
2o
5+ ZrO
2+ Li
2o) be below 10.00.
(8) according to the opticglass described in any one in (1)～(7), wherein, mass ratio ZrO
2/ (Nb
2o
5+ TiO
2) be more than 0.05.
(9) according to the opticglass described in any one in (1)～(8), wherein, mass ratio TiO
2/ (Nb
2o
5+ Ta
2o
5) be more than 0.01.
(10) according to the opticglass described in any one in (1)～(9), wherein, quality and ZrO
2+ Li
2o is more than 5.0% and below 35.0%.
(11), according to the opticglass described in any one in (1)～(10), wherein, be by mass%:
Na
2o composition 0～30.0%
K
2o composition 0～15.0%.
(12) according to the opticglass described in any one in (1)～(11), wherein, Rn
2o composition (in formula, Rn be select in the group of free Li, Na, K composition more than a kind) quality and be below 30.0%.
(13), according to the opticglass described in any one in (1)～(12), wherein, be by mass%:
(14) according to the opticglass described in any one in (1)～(13), wherein, RO composition (in formula, R be select in the group of free Mg, Ca, Sr, Ba, Zn composition more than a kind) quality and be below 20.0%.
(15), according to the opticglass described in any one in (1)～(14), wherein, be by mass%:
Y
2o
3 composition 0～10.0%
La
2o
3 composition 0～10.0%
Gd
2o
3 composition 0～10.0%
Yb
2o
3 composition 0～10.0%.
(16) according to the opticglass described in any one in (1)～(15), wherein, Ln
2o
3composition (in formula, Ln be select in the group of free Y, La, Gd, Yb composition more than a kind) quality and be below 20.0%.
(17), according to the opticglass described in any one in (1)～(16), wherein, be by mass%:
B
2o
3 composition 0～30.0%
P
2o
5 composition 0～10.0%
GeO
2composition 0～10.0%
Al
2o
3 composition 0～15.0%
Ga
2o
3 composition 0～15.0%
WO
3composition 0～20.0%
Bi
2o
3 composition 0～20.0%
TeO
2composition 0～20.0%
Sb
2o
3 composition 0～3.0%.
(18) according to the opticglass described in any one in (1)～(17), wherein, ZrO by mass%
2composition, ZnO composition and Nb
2o
5the content of composition meets ZrO
2+ (ZnO/Nb
2o
5the relation of)>=3.00.
(19) according to the opticglass described in any one in (1)～(18), wherein, mass ratio (Ta
2o
5+ SiO
2+ ZnO)/Nb
2o
5be more than 0.30.
(20) according to the opticglass described in any one in (1)～(19), the specific refractory power (nd) that it has more than 1.75 and below 2.00, (ν is d) to have Abbe number more than 20 and below 40.
(21) according to the opticglass described in any one in (1)～(20), its spectral-transmission favtor is shown as 70% wavelength (λ
70) be below 500nm.
(22) preform that attrition process is used and/or precision press molding is used, it is to be formed by the opticglass described in any one in (1)～(21).
(23) optical element, it is the opticglass described in any one in (1)～(21) to be carried out to grinding and/or grinding forms.
(24) optical element, it is the opticglass described in any one in (1)～(21) to be carried out to precision press molding form.
the effect of invention
According to the present invention, can obtain more at an easy rate specific refractory power and Abbe number in expect scope in and partial dispersion than little opticglass, the preform that has used it and optical element.
Brief description of the drawings
Fig. 1 is for illustrating that partial dispersion is the longitudinal axis and Abbe number (ν than (θ g, F)
d) be the figure of the reference line shown in the rectangular coordinates of transverse axis.
Fig. 2 illustrates that partial dispersion about the glass of the application's embodiment is than (θ g, F) and Abbe number (ν
d) the figure of relation.
Embodiment
Opticglass of the present invention contains 5.0～60.0% SiO by mass%
2composition, Ta
2o
5the content of composition is below 20.0%, and partial dispersion is than (θ g, F) and Abbe number (ν
d) between at ν
d≤ 25 scope meets (0.00160 × ν
d+ 0.63460)≤(θ g, F)≤(0.00421 × ν
d+ 0.72070) relation, at ν
dthe scope of > 25 meets (0.00250 × ν
d+ 0.65710)≤(θ g, F)≤(0.00421 × ν
d+ 0.72070) relation.By being used in combination SiO
2composition and Ta
2o
5composition, and adjust their content, the partial dispersion of glass is than (θ g, F) and Abbe number (ν
d) between there is the relation of expectation.Meanwhile, by reducing Ta
2o
5the content of composition, the material cost of glass is minimized.Therefore, can obtain more at an easy rate specific refractory power and Abbe number in expect scope in and partial dispersion than little opticglass, the preform that has used it and optical element.
Below, the embodiment of opticglass of the present invention is elaborated, the present invention is not subject to any restriction of following embodiment, in target zone of the present invention, can suitably be changed to implement.It should be noted that,, there is the situation that suitably description thereof is omitted in the place of repeating for explanation, but and the purport of non-limiting invention.
[glass ingredient]
Narration below forms the compositing range of each composition of opticglass of the present invention.In this manual, as long as no dated especially, the content of each composition is all the content of using the quality % of the glass total mass forming with respect to oxide compound conversion to represent.Herein, " oxide compound convert composition " all decomposes while referring to the meltings such as the oxide compound that uses as the raw material of glass constituent of the present invention in hypothesis, composite salt, metal fluoride and becomes oxide compound, the total mass of this generation oxide compound is made as to 100 quality % and explains the composition of each composition contained in glass.
< is about essential component, optional member >
SiO
2composition is network former, is to be used to form the skeleton of glass and useful composition., by containing more than 5.0% SiO
2composition, thus the grid structure of glass is increased to the degree that can obtain stable glass, therefore can improve devitrification resistance.Therefore, SiO
2the content of composition preferably establishes 5.0%, more preferably establish 7.0%, further preferably establish 9.0%, further preferably establish 11.0%, further preferably establish 14.0% for lower limit.
On the other hand, by by SiO
2the content of composition is made as below 60.0%, can suppress the reduction of the specific refractory power of glass.Therefore, SiO
2the content of composition preferably establishes 60.0%, more preferably establish 45.0%, further preferably establish 35.0%, further preferably establish 29.5% for the upper limit.
SiO
2composition can use SiO as raw material
2, K
2siF
6, Na
2siF
6deng.
Ta
2o
5composition is to contain the specific refractory power that can improve glass while exceeding 0%, can reduce partial dispersion ratio, can improve transmission of visible light and can reduce the optional member of liquidus temperature.
On the other hand, by by Ta
2o
5the content of composition is made as below 20.0%, can suppress by Ta
2o
5excessive the containing of composition and the rising of the material cost that causes, and can reduce devitrification, vein.Therefore, Ta
2o
5the content of composition is preferably established 20.0%, more preferably establishes 18.0%, is further preferably established 17.0% for the upper limit.
Ta
2o
5composition can use Ta as raw material
2o
5deng.
ZrO
2composition is to contain the specific refractory power that can improve glass while exceeding 0% and the optional member that can reduce partial dispersion ratio.It should be noted that ZrO
2composition also can not contain, but in order easily to obtain the glass with high refractive index and lower part dispersion ratio, for ZrO
2the content of composition, can preferably contain and exceed 0%, more preferably contain and exceed 1.0%, further preferably contain and exceed 2.5%, further preferably contain and exceed 4.0%, further preferably contain and exceed 5.0%, further preferably contain and exceed 6.5%, further preferably contain and exceed 8.0%.
On the other hand, by by ZrO
2the content of composition is made as below 25.0%, can reduce liquidus temperature, the raising devitrification resistance of glass.In addition, can suppress the rising of second-order transition temperature.Therefore, ZrO
2the content of composition preferably establishes 25.0%, more preferably establish 22.0%, further preferably establish 18.0%, further preferably establish 15.0%, further preferably establish 12.0%, further preferably establish 9.3% for the upper limit.
ZrO
2composition can use ZrO as raw material
2, ZrF
4deng.
Nb
2o
5composition is to contain the specific refractory power that can improve glass while exceeding 0%, can reduce Abbe number and can reduce the optional member of partial dispersion ratio.Therefore, for Nb
2o
5composition, can preferably contain and exceed 0%, more preferably contain and exceed 5.0%, further preferably contain and exceed 10.0%, further preferably contain and exceed 21.0%.
On the other hand, by by Nb
2o
5the content of composition is made as below 60.0%, thereby therefore the liquidus temperature step-down of glass can obtain the opticglass that devitrification resistance is high.In addition, thus, can make the transmission of visible light of glass be difficult for worsening, and can reduce overexposure.Therefore, Nb
2o
5the content of composition is preferably established 60.0%, more preferably establishes 55.0%, is further preferably established 52.0% for the upper limit.
Nb
2o
5composition can use Nb as raw material
2o
5deng.
ZrO
2the content of composition is with respect to Nb
2o
5the ratio (mass ratio) of the content of composition is preferably more than 0.01.By increasing this ratio, can reduce partial dispersion ratio and can reduce overexposure.Therefore, mass ratio ZrO
2/ Nb
2o
5preferably establish 0.01, more preferably establish 0.05, further preferably establish 0.09, further preferably establish 0.15 for lower limit.
On the other hand, from can further improving devitrification resistance and improving the viewpoint of meltability of frit, the upper limit of this ratio is preferably established 1.00, more preferably establishes 0.50, is further preferably established 0.30 for the upper limit.
ZrO
2composition and Nb
2o
5the content sum of composition is preferably 25.0～65.0%.
Especially,, by being somebody's turn to do and being made as and be more than 25.0%, can reduce the partial dispersion ratio of glass and can reduce Abbe number.Therefore, quality and (ZrO
2+ Nb
2o
5) preferably establish 25.0%, more preferably establish 30.0%, further preferably establish 35.0%, further preferably establish 40.0%, further preferably establish 46.0% for lower limit.
On the other hand, by being somebody's turn to do and being made as 65.0%, can improve the devitrification resistance of glass and can reduce overexposure.Therefore, quality and (ZrO
2+ Nb
2o
5) preferably establish 65.0%, more preferably establish 62.0%, further preferably establish 60.0% for the upper limit.
Nb
2o
5the content of composition is with respect to Ta
2o
5composition and SiO
2the ratio (mass ratio) of the content sum of composition is preferably more than 0.30 and below 3.00.
Especially, by this ratio is made as more than 0.30, as the Nb of composition that reduces partial dispersion ratio
2o
5the content of composition increases, and therefore can further reduce partial dispersion ratio.Therefore, mass ratio Nb
2o
5/ (Ta
2o
5+ SiO
2) preferably establish 0.30, more preferably establish 0.55, more preferably establish 0.75, further preferably establish 1.00, further preferably establish 1.20 for lower limit.
On the other hand, by this ratio is made as below 3.00, can further improve the devitrification resistance of glass.Therefore, mass ratio Nb
2o
5/ (Ta
2o
5+ SiO
2) preferably establish 3.00, more preferably establish 2.80, further preferably establish 2.50 for the upper limit.
TiO
2composition is to contain the specific refractory power that can improve glass while exceeding 0%, can reduce Abbe number and can improve the optional member of devitrification resistance.Therefore, TiO
2composition can preferably be established and exceed 0%, more preferably establishes 0.5%, further preferably establishes 0.7%, further preferably establishes 1.0% and contain for lower limit.
On the other hand, by by TiO
2the content of composition is made as below 20.0%, can reduce the painted of glass, therefore can make transmission of visible light be difficult for worsening.In addition, thus, can suppress the rising of partial dispersion ratio.Therefore, TiO
2the content of composition preferably establishes 20.0%, more preferably establish 15.0%, further preferably establish 13.0%, further preferably establish 10.0%, further preferably establish 7.5%, further preferably establish 4.5%, further preferably establish 3.3% for the upper limit.
TiO
2composition can use TiO as raw material
2deng.
Li
2o composition is to contain partial dispersion ratio, the reduction liquidus temperature that reduces glass while exceeding 0% and the optional member that can reduce second-order transition temperature.Therefore, Li
2o composition is preferably made as and exceedes 0%, is more preferably made as and exceedes 1.0%, be further preferably made as and exceed 2.5%, be further preferably made as and exceed 3.0% and contain, further preferably establish 5.8% and contain for lower limit.
On the other hand, by by Li
2the content of O composition is made as below 25.0%, can reduce by Li
2excessive the containing of O composition and the devitrification of the glass that causes.In addition, the devitrification resistance while reheating is improved, and therefore can improve the compression moulding of glass.Therefore, Li
2the content of O composition preferably establishes 25.0%, more preferably establish 20.0%, further preferably establish 15.0%, further preferably establish 11.0% for the upper limit.
Li
2o composition can use Li as raw material
2cO
3, LiNO
3, LiF etc.
Nb
2o
5composition and TiO
2the total content of composition is with respect to Ta
2o
5composition, ZrO
2composition and Li
2the ratio (mass ratio) of the total content of O composition is preferably below 10.00.Thus, can reduce partial dispersion ratio.Therefore, mass ratio (Nb
2o
5+ TiO
2)/(Ta
2o
5+ ZrO
2+ Li
2o) preferably establish 10.00, more preferably establish 8.00, further preferably establish 6.00, further preferably establish 4.00, further preferably establish 3.10 for the upper limit.
On the other hand, from can improve glass specific refractory power, reduce the viewpoint of Abbe number, this ratio is preferably established and is exceeded 0, more preferably establishes 0.50, further preferably establishes 0.80 for lower limit.
ZrO
2the content of composition is with respect to TiO
2composition and Nb
2o
5the ratio (mass ratio) of the total content of composition is preferably more than 0.05.Thus, make ZrO
2bring the Nb of high dispersion with respect to meeting
2o
5, TiO
2content ratio in regulation scope in, therefore can take into account low Abbe number and lower part dispersion ratio.Therefore, mass ratio ZrO
2/ (Nb
2o
5+ TiO
2) preferably establish 0.05, more preferably establish 0.08, further preferably establish 0.10, further preferably establish 0.15 for lower limit.
On the other hand, from improving the viewpoint of devitrification resistance of glass, this ratio can preferably be established 0.30, more preferably establishes 0.20, further preferably establish 0.15 for the upper limit.
TiO
2the content of composition is with respect to Nb
2o
5composition and Ta
2o
5the ratio (mass ratio) of the total content of composition is preferably more than 0.01.Especially, comprising a large amount of ZrO
2in the form of composition, by with respect to Nb
2o
5composition and Ta
2o
5composition contains the above TiO of regulation
2composition, can improve the devitrification resistance of glass and can reduce Abbe number.Therefore, mass ratio TiO
2/ (Nb
2o
5+ Ta
2o
5) preferably establish 0.01, more preferably establish 0.05, further preferably establish 0.08, further preferably establish 0.10, further preferably establish 0.13 for lower limit.
On the other hand, from improving the transmission of visible light, the viewpoint of partial dispersion ratio of glass, this ratio is preferably established 0.30, more preferably establishes 0.25, is further preferably established 0.20 for the upper limit.
ZrO
2composition and Li
2the content sum of O composition is preferably more than 5.0% and below 35.0%.
Especially, by being somebody's turn to do and being made as more than 5.0%, even especially at Ta
2o
5in the poor form of composition, also can reduce partial dispersion ratio, therefore, for the glass of little partial dispersion ratio with expectation, can easily seek the reduction of material cost.Therefore, quality and (ZrO
2+ Li
2o) preferably establish 5.0%, more preferably establish 8.0%, further preferably establish 10.0%, further preferably establish 12.0% for lower limit.
On the other hand, by being somebody's turn to do and being made as 35.0%, can improve the devitrification resistance of glass.Therefore, quality and (ZrO
2+ Li
2o) preferably establish 35.0%, more preferably establish 30.0%, further preferably establish 25.0%, further preferably establish 20.0% for the upper limit.
Na
2o composition is to contain the partial dispersion ratio that can reduce glass while exceeding 0%, can improve especially water tolerance and can reduce the optional member of second-order transition temperature of chemical durability.Therefore, Na
2the content of O composition can preferably be established and exceed 0%, more preferably establishes 1.0%, further preferably establishes 2.1% for lower limit.
On the other hand, by by Na
2the content of O composition is made as below 30.0%, can suppress the rising of the partial dispersion ratio of glass.In addition, can reduce by Na
2excessive the containing of O composition and the devitrification of the glass that causes, the compression moulding that can improve glass, and can improve chemical durability.Therefore, Na
2the content of O composition preferably establishes 30.0%, more preferably establish 25.0%, further preferably establish 20.0%, further preferably establish 18.0%, further preferably establish 15.0% for the upper limit.
Na
2o composition can use Na as raw material
2cO
3, NaNO
3, NaF, Na
2siF
6deng.
K
2o composition is to contain the optional member that can reduce second-order transition temperature while exceeding 0%.
On the other hand, by by K
2the content of O composition is made as below 15.0%, can reduce by K
2excessive the containing of O composition and the devitrification of the glass that causes.In addition, the devitrification resistance while reheating is improved, and therefore can improve the compression moulding of glass.Therefore, K
2the content of O composition is preferably established 15.0%, more preferably establishes 10.0%, is further preferably established 5.0% for the upper limit.
K
2o composition can use K as raw material
2cO
3, KNO
3, KF, KHF
2, K
2siF
6deng.
Rn
2o composition (in formula, Rn be select in the group of free Li, Na, K composition more than a kind) total content (quality and) be preferably below 30.0%.Thus, the devitrification resistance of glass can be improved, and hazing under chemical durability, reduction high humidity can be improved.Therefore, Rn
2the total content of O composition is preferably established 30.0%, more preferably establishes 20.0%, is further preferably established 16.0% for the upper limit.
On the other hand, the viewpoint of the devitrification resistance while reheating from further raising, Rn
2the total content of O composition can preferably be established and exceed 0%, more preferably establishes 5.0%, further preferably establishes 8.0% for lower limit.
MgO composition is to contain the optional member that can reduce the melt temperature of glass while exceeding 0%.CaO composition, SrO composition and BaO composition are to contain the liquidus temperature that can reduce glass while exceeding 0%, the optional member that improves devitrification resistance.Wherein, BaO composition still contains the composition of the partial dispersion ratio that can reduce glass while exceeding 0%.
On the other hand, by the content of MgO composition, CaO composition, SrO composition and BaO is made as respectively below 20.0%, can suppresses the reduction of specific refractory power and can improve the devitrification resistance of glass.In addition, by the content of MgO composition and CaO composition is made as respectively below 20.0%, can also improve the chemical durability of glass.
Therefore, the content of MgO composition, CaO composition, SrO composition and BaO is preferably established respectively 20.0%, more preferably establishes 10.0%, is further preferably established 5.0% for the upper limit.
MgO composition, CaO composition, SrO composition and BaO composition can use MgO, MgCO as raw material
3, MgF
2, CaCO
3, CaF
2, Sr(NO
3)
2, SrF
2, BaCO
3, Ba(NO
3)
2deng.
ZnO composition is to contain the liquidus temperature that can reduce glass while exceeding 0% and the optional member that can reduce second-order transition temperature.
On the other hand, by the content of ZnO composition is made as below 30.0%, can obtain the high refractive index of expectation, and can improve the chemical durability of glass.Therefore, the content of ZnO composition is preferably established 30.0%, more preferably establishes 20.0%, is further preferably established 10.0% for the upper limit.
ZnO composition can use ZnO, ZnF as raw material
2deng.
RO composition (R be selected from Mg, Ca, Sr, Ba, Zn more than a kind) total content (quality and) be preferably below 40.0%.Thus, can suppress glass devitrification resistance deterioration and can suppress the reduction of specific refractory power.Therefore, the total content of RO composition preferably establishes 20.0% for the upper limit, and more preferably establishing lower than 10.0%, further preferably establish lower than 5.0%, further preferably establishing lower than 2.0% is the upper limit.
Y
2o
3composition, La
2o
3composition, Gd
2o
3composition and Yb
2o
3composition is to contain the specific refractory power that can improve glass while exceeding 0% and the optional member that can improve devitrification resistance.
On the other hand, by by Y
2o
3composition, La
2o
3composition, Gd
2o
3composition and Yb
2o
3each content of composition is made as below 10.0%, can improve the devitrification resistance of glass, and can make the dispersion of glass be difficult for reducing.Therefore, Y
2o
3composition, La
2o
3composition, Gd
2o
3composition and Yb
2o
3each content of composition is preferably established 10.0%, more preferably establishes 5.0%, is further preferably established 3.0% for the upper limit.
Y
2o
3composition, La
2o
3composition, Gd
2o
3composition and Yb
2o
3composition can use Y as raw material
2o
3, YF
3, La
2o
3, La(NO
3)
3xH
2o(X is integer arbitrarily), Gd
2o
3, GdF
3, Yb
2o
3deng.
Ln
2o
3composition (in formula, Ln be select in the group of free La, Gd, Y, Yb composition more than a kind) total content (quality and) be preferably below 20.0%.Thus, the reduction of the dispersion of glass can be suppressed, the devitrification resistance of glass can be improved simultaneously.Therefore, Ln
2o
3the content sum of composition is preferably established 20.0%, more preferably establishes 10.0%, is further preferably established 4.0% for the upper limit.
B
2o
3composition is to contain the optional member that can form the skeleton of more glass while exceeding 0%.
On the other hand, by by B
2o
3the content of composition is made as below 30.0%, can suppress the reduction of the specific refractory power of glass, and can suppress the deterioration of the transmissivity of visible ray.In addition, can improve the compression moulding of glass.Therefore, B
2o
3the content of composition preferably establishes 30.0%, more preferably establish 15.0%, further preferably establish 8.0%, further preferably establish 4.0% for the upper limit.
B
2o
3composition can use H as raw material
3bO
3, Na
2b
4o
7, Na
2b
4o
710H
2o, BPO
4deng.
P
2o
5composition is to contain the optional member that can improve the stability of glass while exceeding 0%.
On the other hand, by by P
2o
5the content of composition is made as below 10.0%, can reduce by P
2o
5excessive the containing of composition and the devitrification that causes.Therefore, P
2o
5the content of composition is preferably established 10.0%, more preferably establishes 5.0%, is further preferably established 3.0% for the upper limit.
P
2o
5composition can use Al(PO as raw material
3)
3, Ca(PO
3)
2, Ba(PO
3)
2, BPO
4, H
3pO
4deng.
GeO
2composition be contain the specific refractory power that can improve glass while exceeding 0%, the optional member of devitrification can reduce moulding time.
On the other hand, by by GeO
2the content of composition is made as below 10.0%, thereby can reduce expensive GeO
2the usage quantity of composition, therefore can reduce the material cost of glass.Therefore, GeO
2the content of composition is preferably established 10.0%, more preferably establishes 5.0%, is further preferably established 3.0% for the upper limit.
GeO
2composition can use GeO as raw material
2deng.
Al
2o
3composition and Ga
2o
3composition is to contain the optional member that can improve the chemical durability of glass while exceeding 0%.
On the other hand, by the content of these compositions is made as respectively below 15.0%, can improve the devitrification resistance of glass.Therefore, Al
2o
3composition and Ga
2o
3the content of composition is preferably established respectively 15.0%, more preferably establishes 10.0%, is further preferably established 5.0% for the upper limit.
Al
2o
3composition and Ga
2o
3composition can use Al as raw material
2o
3, Al(OH)
3, AlF
3, Ga
2o
3, Ga(OH)
3deng.
WO
3composition is to contain the specific refractory power that can improve glass while exceeding 0%, can reduce Abbe number and can reduce the optional member of liquidus temperature.
On the other hand, by by WO
3the content of composition is made as below 20.0%, can make the partial dispersion of glass rise and can improve transmission of visible light than being difficult for.Therefore, WO
3the content of composition is preferably established 20.0%, more preferably establishes 10.0%, is further preferably established 5.0% for the upper limit.
WO
3composition can use WO as raw material
3deng.
Bi
2o
3composition and TeO
2composition is to contain the specific refractory power that can improve glass while exceeding 0% and the optional member that can reduce second-order transition temperature.
On the other hand, by by Bi
2o
3composition and TeO
2composition content is separately made as below 20.0%, can reduce the painted of glass, can suppress the deterioration of transmission of visible light.Especially, by by Bi
2o
3the content of composition is made as below 20.0%, can make the partial dispersion of glass increase than being difficult for.Therefore, Bi
2o
3composition and TeO
2composition content separately is preferably established 20.0%, more preferably establishes 10.0%, is further preferably established 5.0% for the upper limit.
Bi
2o
3composition and TeO
2composition can use Bi as raw material
2o
3, TeO
2deng.
Sb
2o
3composition is to contain the deaeration that can promote glass while exceeding 0% and the optional member that can make glass clarifying.
On the other hand, by by Sb
2o
3the content of composition is made as below 3.0%, is difficult for producing excessive foaming can make glass melting time, can suppress Sb
2o
3the alloying of composition and fusion apparatus (the especially precious metal such as Pt).Therefore, Sb
2o
3the content of composition is preferably established 3.0%, more preferably establishes 2.0%, is further preferably established 1.0% for the upper limit.Wherein, in the time paying attention to opticglass affecting aspect environment, preferably containing Sb
2o
3composition.
Sb
2o
3composition can use Sb as raw material
2o
3, Sb
2o
5, Na
2h
2sb
2o
75H
2o etc.
It should be noted that, the composition of glass clarifying, deaeration is not limited to above-mentioned Sb
2o
3composition, can use known finings, deaerating agent or their combination in the field of glass manufacture.
The preferred ZrO by mass% of opticglass of the present invention
2composition, ZnO composition and Nb
2o
5the content of composition meets ZrO
2+ (ZnO/Nb
2o
5the relation of)>=3.00.Thus, can further reduce partial dispersion ratio.Therefore, ZrO
2+ (ZnO/Nb
2o
5) value preferably establish 3.00, more preferably establish 5.00, further preferably establish 6.00 for lower limit.
On the other hand, this value is preferably established 15.00, more preferably establishes 12.00, is further preferably established 10.00 for the upper limit.
Ta
2o
5composition, SiO
2the total content of composition and ZnO composition is with respect to Nb
2o
5the ratio (mass ratio) of the content of composition is preferably more than 0.30.Thus, devitrification resistance can be improved, and partial dispersion ratio can be further reduced.Therefore, mass ratio (Ta
2o
5+ SiO
2+ ZnO)/Nb
2o
5preferably establish 0.30, more preferably establish 0.40, further preferably establish 0.50, further preferably establish 0.567 for lower limit.
On the other hand, this mass ratio is preferably established 1.50, more preferably establishes 1.20, is further preferably established 1.00 for the upper limit.
< is about the composition > that should not contain
Then, the composition that should not contain in opticglass of the present invention and the composition that preferably do not contain are described.
Can in the scope of the characteristic of the glass of harmless the present application, add not at above-mentioned other compositions of mentioning as required.Wherein, except Ti, Zr, Nb, W, La, Gd, Y, Yb, Lu, even if each transiting metal components such as V, Cr, Mn, Fe, Co, Ni, Cu, Ag and Mo are independent or compound contain on a small quantity in the situation that respectively, also can make glass coloring, produce and absorb in the certain wave strong point of visibility region, thereby there is the character that transmission of visible light is reduced, therefore especially in the opticglass of wavelength transmission that makes visibility region, preferably substantially do not comprise.
In addition, lead compound and the As such as PbO
2o
3be the composition that environmental pressure is high Deng arsenic compound, therefore expect to be substantially devoid of, except inevitably sneaking into, not contain.
In addition, each composition of Th, Cd, Tl, Os, Be and Se exists and controls the tendency using as harmful chemical goods and materials in recent years, in the situation that using, not only in the manufacturing process of glass, even manufacturing procedure and form in the processing after product and all need the measure in environmental cure.Therefore, on the impact aspect environment, preferably do not basically contain them in the case of paying attention to.
About glass composition of the present invention, its composition is used with respect to the quality % of the glass total mass of oxide compound conversion composition and is represented, therefore not directly with % by mole record represent, the composition based on % by mole expression that meets in the present invention the each composition existing in the glass composition of desired each characteristic is probably got following value by the oxide compound composition that converts.
SiO
210.0～70.0 % by mole of compositions
And
Ta
2o
50～10.0 % by mole of composition
Nb
2o
50～30.0 % by mole of composition
0～50.0 % by mole of MgO composition
0～40.0 % by mole of CaO composition
0～25.0 % by mole of SrO composition
0～20.0 % by mole of BaO composition
0～40.0 % by mole of ZnO composition
Y
2o
30～8.0 % by mole of composition
La
2o
30～5.0 % by mole of composition
Gd
2o
30～5.0 % by mole of composition
Yb
2o
30～5.0 % by mole of composition
B
2o
30～50.0 % by mole of composition
P
2o
50～10.0 % by mole of composition
Al
2o
30～25.0 % by mole of composition
Ga
2o
30～7.0 % by mole of composition
WO
30～15.0 % by mole of composition
Bi
2o
30～7.0 % by mole of composition
Sb
2o
30～2.0 % by mole of composition
[manufacture method]
Opticglass of the present invention can for example be made as shown below.; by above-mentioned raw materials, by each composition, the mode in the scope of the content in regulation is mixed equably; the mixture of making is dropped into platinum crucible, quartz crucible or alumina crucible thick melting; then put into golden crucible, platinum crucible, platinum alloy crucible or iridium crucible and under the temperature range of 1100～1400 DEG C, carry out melting in 3～5 hours; stirring homogenizes and carries out froth breaking etc.; then be down to the temperature of 1000～1300 DEG C; then carry out final stirring and remove vein; be poured into mould slow cooling, make thus.
< physical property >
Opticglass of the present invention has low partial dispersion than (θ g, F).More specifically, the partial dispersion of opticglass of the present invention is than (θ g, F) and Abbe number (ν
d) between at ν
d≤ 25 scope meets (0.00160 × ν
d+ 0.63460)≤(θ g, F)≤(0.00421 × ν
d+ 0.72070) relation, at ν
dthe scope of > 25 meets (0.00250 × ν
d+ 0.65710)≤(θ g, F)≤(0.00421 × ν
d+ 0.72070) relation.Thus, can obtain the opticglass with high dispersion and lower part dispersion ratio, therefore can reduce the chromatic aberation of the optical element being formed by this opticglass.
Herein, ν
dthe partial dispersion of≤25 opticglass is preferably (0.00160 × ν than the lower limit of (θ g, F)
d+ 0.63460), (0.00160 × ν more preferably
d+ 0.63660), (0.00160 × ν more preferably
d+ 0.63860).
In addition, ν
dthe partial dispersion of the opticglass of > 25 is preferably (0.00250 × ν than the lower limit of (θ g, F)
d+ 0.65710), (0.00250 × ν more preferably
d+ 0.65910), (0.00250 × ν more preferably
d+ 0.66110).
On the other hand, about the partial dispersion of opticglass than the upper limit of (θ g, F), ν
d> 25 and ν
dthe two is all preferably (0.00421 × ν≤25 opticglass
d+ 0.72070), (0.00421 × ν more preferably
d+ 0.71970), (0.00421 × ν more preferably
d+ 0.71870).
It should be noted that, especially at Abbe number (ν
d) little region, the partial dispersion of general glass compares in the value higher than reference line, partial dispersion ratio and the Abbe number (ν of general glass
d) relation with curve representation.But, because this curve is difficult to be similar to, therefore in the present invention, use with ν
d=25 straight lines that have a Different Slope for boundary represent with general glassy phase than partial dispersion than low situation.
In addition, opticglass of the present invention preferably has specific refractory power and the dispersion (Abbe number) of regulation.More specifically, the specific refractory power (n of opticglass of the present invention
d) preferably establish 1.75, more preferably establish 1.77, further preferably establish 1.78 for lower limit.On the other hand, the specific refractory power (n of opticglass of the present invention
d) the upper limit can be preferably below 2.00, more preferably below 1.95, more preferably below 1.90.In addition, the Abbe number (ν of opticglass of the present invention
d) preferably establish 40, more preferably establish 35, further preferably establish 30 for the upper limit.On the other hand, the Abbe number (ν of opticglass of the present invention
d) lower limit be not particularly limited, can be preferably more than 20, more preferably more than 23, more preferably more than 25.By these, it is wide that the degree of freedom of optical design becomes, and also can obtain large refraction of light amount even if further seek the slimming of element.
In addition, opticglass of the present invention is preferred painted less, transmission of visible light is high.Especially,, when opticglass of the present invention represents with the transmissivity of glass, in the sample of thickness 10mm, spectral-transmission favtor is shown as 70% wavelength (λ
70) be below 500nm, more preferably below 460nm, more preferably below 420nm.In addition, opticglass of the present invention spectral-transmission favtor in the sample of thickness 10mm is shown as 5% wavelength (λ
5) be below 440nm, more preferably below 400nm, more preferably below 380nm.Thus, the absorption limit of glass is positioned near ultraviolet region, transmissivity for the glass of the light of the wavelength wider than visibility region is improved, therefore painted being minimized, as making visible transmission and proofreading and correct the material of the optical element of secondary spectrum, can preferably use this opticglass thus.
In addition, the overexposure of opticglass of the present invention is preferably below 5.0%.Thus, use for a long time even if group has entered the equipment of opticglass, color balance is also difficult for variation, therefore can carry out for more time the correction of high-precision secondary spectrum.Especially,, because the higher overexposure of use temperature becomes larger, therefore, in the situation that vehicle-mounted purposes etc. is at high temperature used, opticglass of the present invention is effective especially.Therefore, the overexposure of opticglass of the present invention is preferably established 5.0%, more preferably establishes 4.5%, is further preferably established 4.0% for the upper limit.It should be noted that, in this specification sheets, " overexposure " is the deteriorated amount of the spectral-transmission favtor under the 450nm while representing to glass irradiation ultraviolet radiation, particularly, by according to Japanese optics nitre industry meeting standard JOGIS04-1994 " measuring method of the overexposure of opticglass ", measure respectively the spectral-transmission favtor of the front and back of the light that irradiates high voltage mercury lamp and obtain.
[preform and optical element]
The method that can use such as hot repressing to make the compression molding such as type, precision press molding by the opticglass of made is made glass forming body.; can make the preform that compression molding is used by opticglass; this preform is carried out to hot repressing and make type; then carry out attrition process and make glass forming body, or can carry out precision press molding to the preform that carries out preform that attrition process makes, utilizes known float glass process moulding etc. to carry out moulding and make glass forming body.It should be noted that, the method for making glass forming body is not limited to these methods.
The glass forming body operating like this and make is useful in various optical elements and optical design.Especially, opticglass of the present invention preferably uses in the purposes of the optical element such as lens, prism.Thus, can reduce the bleeding of the color being caused by chromatic aberation in the transmitted light of the optical system that is provided with optical element.Therefore, by this optical element for the photographic camera in the situation that, can catch more accurately photography target thing, by this optical element for projector in the situation that, the reflection of can higher honorable ground projection expecting.
[embodiment]
The composition of embodiments of the invention (No.1～No.27) and comparative example (No.A) and specific refractory power (n
d), Abbe number (ν
d), partial dispersion is shown as 5% and 70% wavelength (λ than (θ g, F), overexposure and spectral-transmission favtor
5, λ
70) be shown in table 1～table 4.It should be noted that, following embodiment is only the object of example, and the present invention is not only defined in these embodiment.
In the glass of embodiments of the invention and comparative example, as the raw material of each composition, all selected corresponding oxide compounds separately, oxyhydroxide, carbonate, nitrate, fluorochemical, oxyhydroxide, the highly purified raw material that the common opticglass such as metaphosphoric acid compound use, weigh and evenly mix in the mode of the ratio of the composition of the each embodiment shown in formation table and comparative example, then drop into platinum crucible, correspondingly carry out melting for 3～5 hours the temperature range of 1100～1400 DEG C by electric furnace with the melting difficulty of glass composition, stirring homogenizes and carries out froth breaking etc., then being cooled to 1000～1300 DEG C also stirs and homogenizes, be poured into again mould, glass is made in slow cooling.
Specific refractory power, Abbe number and the partial dispersion of the glass of embodiment and comparative example is than can measuring by standard JOGIS01-2003 based on Japanese optics nitre industry.And, for the value of tried to achieve Abbe number and partial dispersion ratio, obtain relational expression (θ g, F)=-a × ν
dslope a in+b is the intercept b of 0.00160,0.00250,0.00421 o'clock.It should be noted that, the glass using in this mensuration uses slow cooling cooling rate is made as to-25 DEG C/hr, has carried out by leer the glass of processing.
The transmission of visible light of the glass of embodiment and comparative example can be measured by standard JOGIS02-2003 according to Japanese optics nitre industry.It should be noted that, in the present invention, by measuring the transmission of visible light of glass, obtain painted the having or not and degree of glass.Particularly, the spectral-transmission favtor that parallel opposite of thickness 10 ± 0.1mm grinding object is measured to 200～800nm according to JISZ8722, obtains λ
5(wavelength when transmissivity 5%) and λ
70(wavelength when transmissivity 70%).
The overexposure of the glass of embodiment and comparative example, according to Japanese optics nitre industry meeting standard JOGIS04-1994 " measuring method of the overexposure of opticglass ", is measured the variation (%) of the transmittance of the wavelength 450nm of rayed front and back.Herein, the irradiation of light is carried out as follows: opticglass sample is heated to 150 DEG C, uses the light of 3 hours wavelength 450nm of ultra high pressure mercury light irradiation.
[table 1]
[table 2]
[table 3]
[table 4]
It is as shown in the table, the Abbe number (ν of the opticglass of embodiment
d) exceed 25, and partial dispersion is (0.00421 × ν than (θ g, F)
d+ 0.72070), below, more specifically, be (0.00421 × ν
d+ 0.71769) below.
The partial dispersion of the opticglass obtaining in embodiment on the other hand, is than being limited to (0.00250 × ν under (θ g, F)
d+ 0.65710) more than.Therefore known, the partial dispersion of the opticglass of embodiments of the invention than (θ g, F) expect scope in.
On the other hand, comparative example (No.A) although glass ν
d> 25, but partial dispersion has exceeded (0.00421 × ν than (θ g, F)
d+ 0.72070).
Therefore, can be clear and definite: with the glassy phase ratio of comparative example, in the opticglass of embodiment and the relation of Abbe number, partial dispersion is smaller.
In addition, the λ of the opticglass of embodiment
70(wavelength when transmissivity 70%) is below 500nm, more specifically, and below 420nm.In addition, the λ of the opticglass of embodiments of the invention
5(wavelength when transmissivity 5%) is below 440nm, more specifically, and below 360nm.Therefore, can be clear and definite: the opticglass of the embodiments of the invention not transmissivity of easy coloring, visible ray is high.
In addition, the specific refractory power (n of the opticglass of embodiment
d) be more than 1.75, more specifically, be more than 1.79, simultaneously this specific refractory power (n
d) be below 2.00, more specifically, be below 1.90, in the scope of expecting.
In addition, the Abbe number (ν of the opticglass of embodiment
d) be more than 20, more specifically, be more than 25, this Abbe number (ν simultaneously
d) be below 40, more specifically, be below 30, in the scope of expecting.
Therefore, can be clear and definite: the specific refractory power (n of the opticglass of embodiments of the invention
d) and Abbe number (ν
d) in scope in expecting and the transmissivity of visible ray is high, less painted and chromatic aberation is little.
And then, also can be clear and definite: the overexposure of the opticglass of embodiments of the invention is below 5.0%, more specifically, be below 4.5%, the overexposure of the opticglass being caused by ultraviolet long-time irradiation is minimized.
Above, understand in detail the present invention to be exemplified as object, but the present embodiment is only only the object of example, please understand can not depart from thought of the present invention and scope by those skilled in the art and carry out many changes.
Claims (24)
1. an opticglass, wherein, by mass%, contains 5.0～60.0% SiO
2composition, Ta
2o
5the content of composition is below 20.0%, and partial dispersion is than (θ g, F) and Abbe number (ν
d) between at ν
d≤ 25 scope meets (0.00160 × ν
d+ 0.63460)≤(θ g, F)≤(0.00421 × ν
d+ 0.72070) relation, at ν
dthe scope of > 25 meets (0.00250 × ν
d+ 0.65710)≤(θ g, F)≤(0.00421 × ν
d+ 0.72070) relation.
2. opticglass according to claim 1, wherein, is by mass%:
ZrO
2composition 0～25.0%
Nb
2o
5composition 0～60.0%.
3. opticglass according to claim 1, wherein, mass ratio ZrO
2/ Nb
2o
5be more than 0.01.
4. opticglass according to claim 1, wherein, quality and ZrO
2+ Nb
2o
5be 25.0～65.0%.
5. opticglass according to claim 1, wherein, mass ratio Nb
2o
5/ (Ta
2o
5+ SiO
2) be more than 0.30 and below 3.00.
6. opticglass according to claim 1, wherein, is by mass%:
TiO
2composition 0～20.0%
Li
2o composition 0～25.0%.
7. opticglass according to claim 1, wherein, mass ratio (Nb
2o
5+ TiO
2)/(Ta
2o
5+ ZrO
2+ Li
2o) be below 10.00.
8. opticglass according to claim 1, wherein, mass ratio ZrO
2/ (Nb
2o
5+ TiO
2) be more than 0.05.
9. opticglass according to claim 1, wherein, mass ratio TiO
2/ (Nb
2o
5+ Ta
2o
5) be more than 0.01.
10. opticglass according to claim 1, wherein, quality and ZrO
2+ Li
2o is more than 5.0% and below 35.0%.
11. opticglass according to claim 1, wherein, are by mass%:
Na
2o composition 0～30.0%
K
2o composition 0～15.0%.
12. opticglass according to claim 1, wherein, Rn
2the quality of O composition and be below 30.0%, formula Rn
2in O, Rn be select in the group of free Li, Na, K composition more than a kind.
13. opticglass according to claim 1, wherein, are by mass%:
MgO composition 0～20.0%
CaO composition 0～20.0%
SrO composition 0～20.0%
BaO composition 0～20.0%
ZnO composition 0～30.0%.
14. opticglass according to claim 1, wherein, the quality of RO composition and be below 20.0%, in formula RO, R be select in the group of free Mg, Ca, Sr, Ba, Zn composition more than a kind.
15. opticglass according to claim 1, wherein, are by mass%:
Y
2o
3composition 0～10.0%
La
2o
3composition 0～10.0%
Gd
2o
3composition 0～10.0%
Yb
2o
3composition 0～10.0%.
16. opticglass according to claim 1, wherein, Ln
2o
3the quality of composition and be below 20.0%, formula Ln
2o
3in, Ln be select in the group of free Y, La, Gd, Yb composition more than a kind.
17. opticglass according to claim 1, wherein, are by mass%:
B
2o
3composition 0～30.0%
P
2o
5composition 0～10.0%
GeO
2composition 0～10.0%
Al
2o
3composition 0～15.0%
Ga
2o
3composition 0～15.0%
WO
3composition 0～20.0%
Bi
2o
3composition 0～20.0%
TeO
2composition 0～20.0%
Sb
2o
3composition 0～3.0%.
18. opticglass according to claim 1, wherein, ZrO by mass%
2composition, ZnO composition and Nb
2o
5the content of composition meets ZrO
2+ (ZnO/Nb
2o
5the relation of)>=3.00.
19. opticglass according to claim 1, wherein, mass ratio (Ta
2o
5+ SiO
2+ ZnO)/Nb
2o
5be more than 0.30.
20. opticglass according to claim 1, the specific refractory power (nd) that it has more than 1.75 and below 2.00, (ν is d) to have Abbe number more than 20 and below 40.
21. opticglass according to claim 1, its spectral-transmission favtor is shown as 70% wavelength (λ
70) be below 500nm.
22. 1 kinds of attrition process with and/or the preform used of precision press molding, it is to be formed by the opticglass described in any one in claim 1～21.
23. 1 kinds of optical elements, it is the opticglass described in any one in claim 1～21 to be carried out to grinding and/or grinding forms.
24. 1 kinds of optical elements, it is the opticglass described in any one in claim 1～21 to be carried out to precision press molding form.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012268731 | 2012-12-07 | ||
| JP2012-268731 | 2012-12-07 | ||
| JP2013-218628 | 2013-10-21 | ||
| JP2013218628A JP5863745B2 (en) | 2012-12-07 | 2013-10-21 | Optical glass, preform and optical element |
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| Publication Number | Publication Date |
|---|---|
| CN103864293A true CN103864293A (en) | 2014-06-18 |
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ID=50903378
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|---|---|---|---|
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| TW (1) | TWI658021B (en) |
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| CN109896740A (en) * | 2019-04-24 | 2019-06-18 | 成都光明光电股份有限公司 | Optical glass and optical element |
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| TW201233652A (en) * | 2011-02-14 | 2012-08-16 | Schott Glass Technologies Suzhou Co Ltd | Optical glass for precision molding |
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| CN1369448A (en) * | 2001-01-29 | 2002-09-18 | 保谷株式会社 | Optical glass |
| CN101932532A (en) * | 2008-01-31 | 2010-12-29 | Hoya株式会社 | Optical glass |
| JP2011037660A (en) * | 2009-08-07 | 2011-02-24 | Ohara Inc | Optical glass, lens preform and optical element |
| CN102471130A (en) * | 2009-08-07 | 2012-05-23 | 株式会社小原 | Optical glass |
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| CN108290768A (en) * | 2015-11-24 | 2018-07-17 | 旭硝子株式会社 | Optical glass |
| CN110691760A (en) * | 2017-06-02 | 2020-01-14 | Hoya株式会社 | Glass, optical glass and optical element |
| CN111217519A (en) * | 2018-11-27 | 2020-06-02 | 宜城市泳瑞玻璃科技有限公司 | Environment-friendly optical glass |
| CN109867442A (en) * | 2019-04-24 | 2019-06-11 | 成都光明光电股份有限公司 | Optical glass |
| CN109896740A (en) * | 2019-04-24 | 2019-06-18 | 成都光明光电股份有限公司 | Optical glass and optical element |
| CN109867442B (en) * | 2019-04-24 | 2021-11-26 | 成都光明光电股份有限公司 | Optical glass |
| CN109896740B (en) * | 2019-04-24 | 2022-04-22 | 成都光明光电股份有限公司 | Optical glass and optical element |
| CN113666635A (en) * | 2021-09-07 | 2021-11-19 | 成都光明光电股份有限公司 | Optical glass and optical element |
| CN113735436A (en) * | 2021-09-07 | 2021-12-03 | 成都光明光电股份有限公司 | Optical glass, glass preform, optical element and optical instrument |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201422554A (en) | 2014-06-16 |
| TWI658021B (en) | 2019-05-01 |
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