CN103922582A - Optical glass and optical element - Google Patents

Optical glass and optical element Download PDF

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Publication number
CN103922582A
CN103922582A CN201410187976.4A CN201410187976A CN103922582A CN 103922582 A CN103922582 A CN 103922582A CN 201410187976 A CN201410187976 A CN 201410187976A CN 103922582 A CN103922582 A CN 103922582A
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glass
opticglass
optical glass
optical
content
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CN103922582B (en
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戎俊华
王拓
徐光以
荣幸
徐华峰
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Hubei New Huaguang Information Materials Co Ltd
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Hubei New Huaguang Information Materials Co Ltd
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Abstract

The invention provides optical glass and an optical element. The optical glass comprises following components by weight percent of oxides: 3-16% of SiO2, 2-15% of B2O3, 10-25% of sigma (SiO2 and B2O3), 38-55% of La2O3, 0-10% of Y2O3, 0-10% of Gd2O3, 45-65% of sigma (La2O3 and Y2O3 and Gd2O3), 3-15% of ZnO, 0-5% of Ta2O5, 4-10% of Nb2O5, 0-5% of TiO2, 2-10% of ZrO2, and 0-0.2% of Sb2O3, wherein SiO2 or B2O3 is greater than 1 and less than or equal to 2. The optical glass contains no oxides of alkali metal and alkaline-earth metal, such as Yb2O3, WO3, GeO2, TeO2, thorium, lead, arsenic, cadmium and mercury. The optical glass has the refractive index nd in 1.89-1.92, abbe number upsilon d in 36.5-39, specific gravity less than 5.10g/cm<3>, glass-transition temperature lower than 680DEG C, low devitrification tendency and high transmittance, the transmittance can reach over 70% in 390nm or shorter wave length, the devitrification temperature is lower than 1150DEG C, so that the optical glass is suitable for volume production and is mainly used in digital products, cameras, liquid crystal projection and the like. The optical element is made of the optical glass.

Description

Opticglass and optical element
Technical field
The present invention relates to a kind of opticglass, particularly relate to a kind of specific refractory power (nd) in 1.89～1.92 scope, (υ is d) in 36.5～39 scope, and proportion is lower than 5.10g/cm for Abbe number 3, glass transition temperature Tg is lower than 680 DEG C, and transmitance can reach more than 70% optical glass having high refractive index under 390nm or shorter wavelength, at the coefficient of expansion (α of 20～120 DEG C of temperature ranges 20～120 DEG C) be less than 80 × 10 -7/ DEG C, recrystallization temperature is lower than 1150 DEG C, and relates to optical element.
Background technology
In Optical System Design, conventionally adopt glass of high refractive index or utilize non-spherical lens sheet etc. to promote the realization to miniaturization, ultrathin and wide-angle of digital camera, mobile phone camera.And this class specific refractory power is in the use of the refraction of 1.89～1.92 height, glass that Abbe number is relatively high, can reduce the usage quantity of camera lens in optical design, be conducive to improve image quality, reduce the volume of camera lens simultaneously.Can make up and correcting chromatic aberration, increase substantially resolving power, improve the sensitivity of image sensing device simultaneously.
Chinese patent application CN101337768A discloses a kind of specific refractory power 1.86～1.92, and the opticglass of Abbe number 35～40 wherein contains 6～20 % by weight Ta 2o 5.On the one hand due to Ta 2o 5expensive, be unfavorable for the reduction of cost of goods manifactured, on the other hand more amount Ta 2o 5add, be unfavorable for the reduction of specific gravity of glass.
Chinese patent application CN101239780A discloses a kind of specific refractory power and has been greater than 1.87, the opticglass that Abbe number is greater than 35～40, and it contains 12～36 % by mole of ZnO and 1～20 % by mole of WO 3.ZnO content is higher, is unfavorable for the control of glass melting, WO 3existence be unfavorable for the raising of glass transmitance, be unfavorable for the protection of mould when glass mould part is made simultaneously.
Chinese patent application CN1524815A discloses a kind of specific refractory power in 1.8～2.1 scopes, the optical glass having high refractive index of Abbe number in 20～40 scopes.B in the weight percent content of its composition 2o 3> SiO 2.Due to such optical glass having high refractive index, the viscosity of glass is little, introduces too much B 2o 3the viscosity of glass, the control of striped while being unfavorable for glass ware forming will be reduced.
Chinese patent application CN1445188A discloses a kind of specific refractory power and has been greater than 1.85, the opticglass that Abbe number is greater than 35.Wherein contain 0.5～15 % by mole of Li 2o, owing to using Li 2+the effect of gathering, be unfavorable for the reduction of devitrification of glass ceiling temperature, what increase glass founds difficulty, increases the coefficient of expansion of glass simultaneously, reduces glass thermal shock resistance.
It is 1.84～1.96 that Chinese patent application CN1472154A discloses a kind of specific refractory power, and the opticglass that Abbe number is 27～36 wherein contains 6～14.5%Nb by weight percentage 2o 5, 1～8%SiO 2with 13～19.5%B 2o 3, B 2o 3content is greater than SiO 2content, is unfavorable for the raising of glass high temperature viscosity, increases difficulty to the moulding of glass.
Chinese patent application CN101386469A discloses a kind of specific refractory power 1.85～1.90, and the opticglass of the high-refractivity and low-dispersion of Abbe number 35～45 wherein contains and is greater than 19 and is less than 27 % by weight Ta 2o 5be unfavorable for the reduction of specific gravity of glass.
It is 1.90～1.92 that Chinese patent application CN102674691A discloses a kind of specific refractory power (nd), and (υ is d) 33～36 height refraction low-dispersion lanthanide optical glass to Abbe number.Wherein contain 8～14 % by weight Y 2o 3, 7～13 % by weight Nb 2o 5, cause the recrystallization temperature of glass high, increase the difficulty of founding of glass.
Chinese patent application CN102515516A discloses a kind of specific refractory power 1.90～1.92, and the opticglass of Abbe number 33～36 wherein contains 11～20 % by weight Gd 2o 3, be greater than 2 but be less than or equal to 5 % by weight WO 3, WO 3existence be unfavorable for the raising of glass transmitance, be unfavorable for the protection of mould when glass mould part is made, and Gd simultaneously 2o 3content is high, is unfavorable for reducing the material cost of glass.
Chinese patent application CN102424523A discloses a kind of specific refractory power more than 1.88, and more than 37 opticglass of Ah's multiple contains 5～15 % by weight WO 3with 10～20 % by weight Ta 2o 5.Ta 2o 5a large amount of existence be unfavorable for the reduction of specific gravity of glass, WO simultaneously 3existence be unfavorable for the raising of glass transmitance, be unfavorable for the protection of mould when glass mould part is made.
Chinese patent application CN101279816A discloses a kind of specific refractory power in 1.8～2.2 scopes, and Abbe number is the opticglass in 16～40 scopes, and its glass system is B 2o 3-TeO 2-La 2o 3system, the TeO that contains 0.2～60mol% 2.In process of production due to TeO 2cause volatilization striped, be unfavorable for the control of this kind of glass cord.
Japanese Patent Laid-Open 2005-179142 discloses a kind of specific refractory power 1.8～2.1, the optical glass having high refractive index of Abbe number in 20～40 scopes.Wherein B 2o 3content is greater than SiO 2content, is unfavorable for the raising of glass high temperature viscosity, increases difficulty to the moulding of glass.
Summary of the invention
The object of the invention is to overcome above-mentioned the deficiencies in the prior art part and provide a kind of specific refractory power (nd) in 1.89～1.92 scopes, (υ is the opticglass in 36.5～39 scopes d) for Abbe number.
The invention provides a kind of opticglass, described opticglass contains following component by oxide weight per-cent:
Opticglass provided by the invention, its have specific refractory power (nd) 1.89～1.92, (υ is the optical constant in 36.5～39 scopes d), and does not contain the oxide compound of alkali and alkaline earth metal ions, Yb for Abbe number 2o 3, WO 3, GeO 2and TeO 2, and the objectionable impurities composition such as thorium, lead, arsenic, cadmium, mercury.
The present invention also provides a kind of optical element, and it is made up of opticglass of the present invention.
According to opticglass provided by the invention, in formula, do not contain the TeO that easily causes volatilization striped 2composition, the generation of the striped of avoiding volatilizing; Do not contain the WO that is unfavorable for that glass transmitance improves 3; Control the B in formula 2o 3with SiO 2ratio, effectively controls the viscosity of glass, is convenient to the control of glass ware forming striped; Control the Ta in formula 2o 5content, alleviates the proportion of glass, reduces the production cost of glass; Control the Nb in formula 2o 5content, the material cost of attenuating glass; The content of controlling alkali and alkaline earth metal ions oxide compound in formula is 0, improves the thermostability of glass; Do not contain expensive GeO 2composition and have the Yb of absorption peak at near-infrared band 2o 3.Have low tendency towards devitrification and high transmitance, recrystallization temperature, lower than 1150 DEG C, is suitable for batch production.Be mainly used in digital product, pick up camera, crystal projection etc.
The present invention is mainly to reduce the manufacturing cost of glass, improves the quality product of glass, reduces the coefficient of expansion of glass simultaneously, improves the thermostability of glass.
Embodiment
The inventor is by a large amount of tests, prepare specific refractory power of the present invention (nd) 1.89～1.92, (υ is the opticglass in 36.5～39 scopes d) for Abbe number.
According to opticglass provided by the invention, it contains following component by oxide weight per-cent:
This opticglass does not contain and destroys glass network structure, makes devitrification of glass degradation, increases the alkali and alkaline earth metal ions oxide compound of glass swelling coefficient, does not contain the Yb that has absorption peak at near-infrared band 2o 3, be unfavorable for the WO of the raising of glass transmitance 3, expensive GeO 2easily cause the TeO of volatilization striped 2, and do not contain the objectionable impurities compositions such as thorium, lead, arsenic, cadmium, mercury, its specific refractory power (nd) 1.89～1.92, (υ is d) in 36.5～39 scopes for Abbe number.
According to opticglass provided by the invention, in the preferred case, described opticglass contains following component by oxide weight per-cent:
According to opticglass provided by the invention, in more preferably situation, described opticglass contains following component by oxide weight per-cent:
According to opticglass provided by the invention, its proportion is lower than 5.10g/cm 3, second-order transition temperature is lower than 680 DEG C, and transmitance can reach more than 70% under 390nm or shorter wavelength, and recrystallization temperature is lower than 1150 DEG C.
The present invention also provides a kind of optical element, and it is made up of opticglass of the present invention.
In the optical glass having high refractive index making in the present invention, selected every kind of component of above-mentioned content by reason described below.In as described below, the content of each component represents with weight percent (wt%).
SiO 2composition is network former, is the composition that improves devitrification resistance and chemical stability simultaneously.In order to reach above-mentioned effect, weight content is more than 3%, but weight content is while exceeding 16%, reduces La 2o 3meltbility in glass, increases the melting difficulty of glass, and the specific refractory power of glass is difficult to reach 1.92 simultaneously, and the crystallization ceiling temperature of glass can improve, and increases the moulding difficulty of glass.Due to TiO a small amount of in glass ingredient 2easily cause the painted of glass, too low SiO 2content is by the bridging oxygen content reducing in glass, therefore preferred SiO 2content is in 4%～13% scope, more preferably in 5%～12% scope.
B 2o 3composition is the essential composition as network former in the opticglass of the present invention that contains in a large number rare earth oxide.Its content lower than 2% time, is difficult to form stable glass, and while exceeding 15%, the chemical stability of glass declines, and does not reach needed specific refractory power.Therefore B 2o 3content be controlled at 2%～15%, preferably 3%～12.5%, more preferably 4%～11%.
The present inventor finds by lot of experiments: in specific refractory power (nd) in 1.89～1.92 scopes, (υ is d) in the opticglass in 36.5～39 scopes, SiO for Abbe number 2with B 2o 3weight content sum be not less than 10%, could form stable glass; SiO 2with B 2o 3weight content sum while being greater than 25%, the specific refractory power, the Abbe number that obtain glass are difficult to reach specified range of the present invention.SiO 2with B 2o 3weight content sum be preferably controlled at 11%～23%, be more preferably controlled at 13%～21%.In addition SiO, 2/ B 2o 3it is better that mass ratio is greater than the stability, glass forming at 1 o'clock, and the recrystallization temperature of glass is lower.But, work as SiO 2/ B 2o 3weight ratio is greater than at 2 o'clock, forms the bad stability of glass, and the recrystallization temperature of glass is greater than 1350 DEG C, by form and even can not form glass.
La 2o 3composition is the effective constituent that improves glass refraction and increase Abbe number, is the main component of the high dioptrics glass of this class.When its content is less than 38%, the specific refractory power of glass, Abbe number will be difficult to reach above-mentioned specified range, but the tendency towards devitrification of glass increases while exceeding 55%, and liquidus temperature raises.Its content is preferably controlled at 40%～50%, more preferably in 42%～48% scope.
Y 2o 3with La 2o 3performance is consistent, can make opticglass have higher specific refractory power and lower dispersion, suitably adds the crystallization property that can improve glass in glass composition.But in the time that its content exceedes 10%, devitrification resistance property worsens, the Abbe number of glass declines on the contrary, and its high-content is preferably below 8%, more preferably below 6%.
Gd 2o 3with Y 2o 3, La 2o 3performance is consistent, can make opticglass have higher specific refractory power and lower dispersion, and improve the chemical stability of opticglass, but its price is higher, and content is introduced the cost that can greatly improve glass when too much, so Gd 2o 3content should be controlled at below 10%, be preferably controlled at below 8%, be more preferably controlled at below 6%.
Find by a large amount of tests: La in this glass composition 2o 3, Y 2o 3, Gd 2o 3weight and must be controlled in 65%, otherwise the opticglass crystallization property of making can degenerate, the proportion of glass will be greater than 5.10g/cm simultaneously 3.But La 2o 3, Y 2o 3, Gd 2o 3weight and must be not less than 45%, otherwise the optical constant of glass will be difficult to reach scope of the present invention.Therefore La 2o 3, Y 2o 3, Gd 2o 3weight and be controlled in 45%～65% scope, be preferably controlled in 48%～60% scope, be more preferably controlled at 50%～58%.Find by a large amount of tests: La simultaneously 2o 3, Y 2o 3with Gd 2o 3weight ratio while being 9:1:1, obtain the crystallization ceiling temperature of glass lower than 1100 DEG C.
ZnO improves the requisite composition of devitrification of glass performance, has the effect of fluxing simultaneously.In the present invention, when its content is less than 3%, do not reach obvious effect, and after its content exceedes 15%, be difficult to reach the optical constant of opticglass glass of the present invention, and can increase the erosion to smelting apparatus in fusion process, be difficult to melt out the glass that inner quality is good.So the content of ZnO should be controlled in 3%～15% scope, be preferably controlled in 5%～14% scope, be more preferably controlled in 7%～11% scope.Lay special stress on: find by a large amount of test, in particularly preferred situation, ZnO content 10% time, stability the best of glass.
Ta 2o 5can be used as that the composition that makes opticglass obtain high refractive index and low dispersion introduces.In the present invention, when introducing a small amount of Ta 2o 5time, it has the effect that does not reduce glass refraction and increase glass devitrification resistance stabilizability, because its price is higher, also can significantly improve the cost of glass, therefore Ta when introduction volume is too much 2o 5content should be controlled at below 5%, preferably below 3%.Lay special stress on: find by a large amount of tests, in particularly preferred situation, Ta 2o 5content 2% time, stability the best of glass.
Nb 2o 5there is the effect that improves optical glass refractive index, in the present invention, in the time that its content is less than 4%, do not reach the optical property of the present invention's expection, and in the time that its content exceedes 10%, the crystallization property variation of glass, is preferably controlled in 5%～7.5% scope.Lay special stress on: find by a large amount of tests, in particularly preferred situation, Nb 2o 5content is 6% time, and the crystallization ceiling temperature of the opticglass obtaining is lower than 1100 DEG C.
TiO 2also be the effective constituent that improves glass refraction glass, but TiO 2introducing by causing that glass coloring deepens, reduces the transmitance of glass, particularly outside transmitance is reached 5% wavelength X 5impact large.Find by a large amount of tests: introduce on a small quantity TiO 2not only do not affect outside transmitance λ 5, can also reduce the crystallization upper limit of opticglass of the present invention.For reaching effect of the present invention, TiO 2content should be controlled in 0～5% scope, be preferably controlled in 1%～4.5% scope, be more preferably controlled between 2%～4%.Lay special stress on: find by a large amount of tests, in particularly preferred situation, TiO 2content is 3.5% time, and the crystallization ceiling temperature of the opticglass obtaining is lower than 1100 DEG C, and outside transmitance reaches 5% wavelength X 5be less than 345nm.
ZrO 2having the effect that makes opticglass improve optical constant and improve devitrification resistance and chemical stability, can also play the effect that improves specific refractory power and reduce dispersion in lanthanide glass, is the necessary component of adding in the present invention.But when it contains quantity not sufficient 2%, DeGrain, and in the time that its content is greater than 10%, the melting behaviour of glass and crystallization property all can variation.So, ZrO 2content should be controlled between 2%～10%, be preferably controlled between 3%～8%, be more preferably controlled at 4%～7%.
Sb 2o 3can be used as defrother and add arbitrarily, but its content is just enough in 0.2%, and Sb 2o 3if exceed 0.2%, the degree of staining of glass will become large.Therefore Sb 2o 3component concentration is limited to 0～0.2%.
For ensureing the spectral transmittance of opticglass of the present invention, opticglass provided by the invention is not artificially introduced the element that other except above component can be painted: V, Mo, Cr, Mn, Fe, Co, Ni, Cu and Ag.Meanwhile, artificially do not introduce the compound that contains following harmful element: Th, Cd, Tl, Os, Be, Se, Pb, As, Hg and fluorochemical yet.In addition, object to better implement the present invention, the present invention emphasizes not, containing having erosion action and can destroy glass network structure, make devitrification of glass degradation, increase the alkali and alkaline earth metal ions oxide components of glass swelling coefficient and have absorption peak at near-infrared band smelting apparatus, to affect the Yb of this wave band transmitance of opticglass 2o 3.
The invention still further relates to the production method of this opticglass.When the manufacturing of this opticglass, get after purity that each self-corresponding oxide compound, carbonate, nitrate etc. conventionally use in opticglass is greater than 99% raw material and weighs by fixing weight percent electronic scales, directly enter V-type mixer and mix and join again the full platinum smelting apparatus of general opticglass and carry out being drawn into type after melting and become needed plate.
The invention still further relates to the production method of the optical element blank taking this opticglass as material.Concrete operations are: according to the density of the size of optical element and this opticglass, calculate and prepare the stock volume that optical element blank needs glass, then plate is cut on cutting machine to the blank of optical element blank, again the blank of part blank is heated to softening temperature point by process furnace, then utilizes the shape mould of optical element blank to carry out hot-forming making.
Embodiment
Embodiment 1～30 and comparative example 1～5
By SiO 2, B 2o 3, La 2o 3, Y 2o 3, Gd 2o 3, ZnO, Ta 2o 5, Nb 2o 5, TiO 2, ZrO 2, Sb 2o 3all choose separately the raw material that the purity that uses in the common opticglass such as corresponding oxide compound, carbonate, nitrate is greater than 99% Deng raw material, after weighing proportioning according to the weight content shown in table 1 and continued 1, evenly mix, be added in platinum crucible, the complexity of melting is different with component, general at the temperature of 1250～1350 DEG C, melting in about 2～4 hours, stir after, be poured in mould, through slowly cooling, can make these glass test portions.Then be processed into the opticglass sample of high refractive index according to the normally used method in this area.
Performance test
Adopt the testing method as described below opticglass that test implementation example 1-30 and comparative example 1-5 make respectively specific refractory power (nd), Abbe number (υ d), second-order transition temperature (Tg), the linear expansivity (α of 20 DEG C to 120 DEG C 20～120 DEG C), density (ρ), liquidus temperature (L t), degree of staining (λ 70/ λ 5), water tolerance (Dw), test result is shown in Table 2.
1, degree of staining λ 70/ λ 5:
Making thickness is 10 ± 0.1mm, there is the flat glass sample being parallel to each other through optical grinding, from the direction vertical with above-mentioned plane, inject to this glass specimen the light that intensity is Iin, measure the intensity I out of transmitted ray, strength ratio Iout/Iin is called to the outside transmitance of glass.
In the scope of wavelength 200～700nm, wavelength corresponding when outside transmitance is reached to 70% is denoted as λ 70, outside transmitance while reaching 5% corresponding wavelength be denoted as λ 5.
2, refractive index n d, Abbe number υ d:
Testing method according to GB/T7962.1 standard is measured.
3, liquidus temperature L t:
Adopt the GM-N16P type gradient furnace of day written or printed documents mountain company to carry out liquidus temperature L tmensuration.
4, second-order transition temperature and coefficient of linear expansion:
Adopt the TMA tester of U.S. PE company to carry out the linear expansivity (α of tested glass transition temperature (Tg) and 20～120 DEG C 20～120 DEG C).
5, water tolerance (Dw):
Measure and classification according to the testing method of GB/T17129-1997 standard.
6, density (ρ)
The method specifying according to GB/T7962.20-2010 is measured.
The performance test of table 2: embodiment and comparative example
? nd υd Tg(℃) ρ(g/cm 3) L T(℃) λ 70/λ 5 D w α 20～120℃×10 7/℃
Embodiment 1 1.89815 37.42 669 5.08 1135 380/340 1 68.9
Embodiment 2 1.89998 38.12 668 5.08 1138 382/342 1 69.3
Embodiment 3 1.89670 38.41 662 5.09 1128 382/342 1 71.2
Embodiment 4 1.91028 36.51 673 5.08 1140 385/345 1 65.5
Embodiment 5 1.90890 37.10 673 5.06 1138 385/345 1 64.3
Embodiment 6 1.90029 37.12 653 5.05 1100 385/345 1 77.9
Embodiment 7 1.89913 38.41 660 5.01 1135 378/341 1 78.1
Embodiment 8 1.89932 36.85 657 5.06 1100 380/345 1 76.6
Embodiment 9 1.90519 36.9 663 4.95 1125 382/345 1 78.6
Embodiment 10 1.89413 38.91 640 5.05 1138 375/335 1 79.1
Embodiment 11 1.90132 37.5 668 5.08 1135 379/341 1 67.5
Embodiment 12 1.90335 37.49 669 5.08 1138 378/342 1 68.2
Embodiment 13 1.89769 38.41 672 5.09 1139 378/342 1 72.3
Embodiment 14 1.90973 36.51 673 5.09 1135 385/345 1 66.7
Embodiment 15 1.90593 36.91 674 5.09 1128 385/345 1 63.2
Embodiment 16 1.90099 37.12 653 5.07 1100 388/345 1 76.9
Embodiment 17 1.89996 37.65 672 5.08 1128 381/342 1 66.4
Embodiment 18 1.89915 37.42 658 5.09 1135 382/339 1 68.3
Embodiment 19 1.89595 38.62 656 5.09 1142 383/345 1 73.9
Embodiment 20 1.91253 36.51 672 5.05 1138 385/342 1 69.8
Embodiment 21 1.90995 37.10 679 5.07 1133 387/342 1 63.9
Embodiment 22 1.90100 37.12 662 5.07 1100 388/345 1 76.0
Embodiment 23 1.90576 36.86 661 4.95 1128 382/345 1 74.9
Embodiment 24 1.90649 36.91 661 4.95 1140 382/345 1 76.9
Embodiment 25 1.90432 36.81 662 4.95 1135 382/345 1 75.8
Embodiment 26 1.91035 37.49 668 5.08 1142 379/341 1 69.2
Embodiment 27 1.90999 37.42 669 5.08 1148 378/342 1 70.2
Embodiment 28 1.91372 36.51 673 5.09 1140 385/345 1 68.9
Embodiment 29 1.91158 36.50 673 5.09 1148 385/345 1 71.2
Embodiment 30 1.91653 36.98 672 5.05 1148 385/342 1 70.8
Comparative example 1 1.90169 37.02 707 5.45 1200 395/352 1 65.9
Comparative example 2 1.91105 37.12 695 5.45 1230 382/339 1 69.5
Comparative example 3 1.91132 37.42 689 5.38 1210 378/342 1 64.8
Comparative example 4 1.91532 36.4 715 5.08 1280 410/365 1 67.5
Comparative example 5 1.91896 36.8 675 5.08 1220 425/363 1 93.5
The opticglass of the embodiment of the present invention 1～30 not only has specific refractory power (nd) in institute's claimed range and Abbe number, and (υ d), and glass transmitance under 390nm or shorter wavelength can reach more than 70%, the recrystallization temperature of glass is lower than 1150 DEG C simultaneously, there is low liquidus temperature and good processing performance, be suitable for mass production, its second-order transition temperature, lower than 680 DEG C, is conducive to the making of the optical element blank taking this opticglass as material simultaneously.
The density of the density ratio opticglass of the present invention of the glass of comparative example 1 and 2 is large, and crystallization ceiling temperature is higher more than 50 DEG C than the crystallization ceiling temperature of opticglass of the present invention, is unfavorable for batch production.
The second-order transition temperature point (Tg) of the glass of comparative example 3 approaches with opticglass of the present invention, but obviously 1210 DEG C of and its crystallization ceiling temperatures larger than the density of the present invention opticglass of density, higher more than 60 DEG C than crystallization ceiling temperature of the present invention, be unfavorable for the production of glass.
Approaching of the density of the glass of comparative example 4 and opticglass of the present invention, but 1280 DEG C of its crystallization ceiling temperatures are higher more than 130 DEG C than crystallization ceiling temperature of the present invention, be unfavorable for the production of glass, and its transmitance move to long wave direction.
Approaching of the density of comparative example 5 glass and second-order transition temperature and opticglass of the present invention, but its coefficient of expansion is large, the poor heat stability of glass and transmitance move to long wave direction, and recrystallization temperature is high more than 70 DEG C simultaneously, the crystallization property of glass is poor, is unsuitable for batch production.

Claims (5)

1. an opticglass, is characterized in that, described opticglass contains following component by oxide weight per-cent:
Described opticglass does not contain oxide compound, the Yb of alkali and alkaline earth metal ions 2o 3, WO 3, GeO 2, TeO 2, and thorium, lead, arsenic, cadmium and mercury, and the refractive index n d of described opticglass in 1.89～1.92 scope, Abbe number υ d is in 36.5～39 scope.
2. opticglass according to claim 1, is characterized in that, described opticglass contains following component by oxide weight per-cent:
3. opticglass according to claim 1 and 2, is characterized in that, described opticglass contains following component by oxide weight per-cent:
4. according to the opticglass described in claim 1-3 any one, it is characterized in that, the proportion of described opticglass is lower than 5.10g/cm 3, second-order transition temperature is lower than 680 DEG C, and transmitance can reach more than 70% under 390nm or shorter wavelength, and recrystallization temperature is lower than 1150 DEG C.
5. an optical element, it is made up of the opticglass described in claim 1-4 any one.
CN201410187976.4A 2014-05-06 2014-05-06 Optical glass and optical element Active CN103922582B (en)

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CN106348586A (en) * 2016-08-31 2017-01-25 湖北新华光信息材料有限公司 Optical glass and preparation method thereof
CN106927676A (en) * 2017-02-22 2017-07-07 中国科学院上海光学精密机械研究所 The flint optical glass with heavy lanthanum of high-refractivity and low-dispersion
JP2018525311A (en) * 2015-08-14 2018-09-06 成都光明光▲電▼股▲分▼有限公司 Optical glass
CN110835231A (en) * 2018-08-17 2020-02-25 成都光明光电股份有限公司 Optical glass, glass preform or optical element prepared from optical glass, and optical instrument
CN110835230A (en) * 2018-08-17 2020-02-25 成都光明光电股份有限公司 Optical glass, glass preform, optical element and optical instrument having the same
CN110835232A (en) * 2018-08-17 2020-02-25 成都光明光电股份有限公司 Optical glass, glass preform or optical element prepared from optical glass, and optical instrument
CN110835227A (en) * 2018-08-17 2020-02-25 成都光明光电股份有限公司 Optical glass, glass preform or optical element prepared from optical glass, and optical instrument
CN110835228A (en) * 2018-08-17 2020-02-25 成都光明光电股份有限公司 Optical glass, glass preform or optical element prepared from optical glass, and optical instrument

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JP2018525311A (en) * 2015-08-14 2018-09-06 成都光明光▲電▼股▲分▼有限公司 Optical glass
CN106348586A (en) * 2016-08-31 2017-01-25 湖北新华光信息材料有限公司 Optical glass and preparation method thereof
CN106348586B (en) * 2016-08-31 2019-03-15 湖北新华光信息材料有限公司 A kind of optical glass and preparation method thereof
CN106927676A (en) * 2017-02-22 2017-07-07 中国科学院上海光学精密机械研究所 The flint optical glass with heavy lanthanum of high-refractivity and low-dispersion
CN106927676B (en) * 2017-02-22 2019-03-08 中国科学院上海光学精密机械研究所 The flint optical glass with heavy lanthanum of high-refractivity and low-dispersion
CN110835230A (en) * 2018-08-17 2020-02-25 成都光明光电股份有限公司 Optical glass, glass preform, optical element and optical instrument having the same
CN110835231A (en) * 2018-08-17 2020-02-25 成都光明光电股份有限公司 Optical glass, glass preform or optical element prepared from optical glass, and optical instrument
CN110835232A (en) * 2018-08-17 2020-02-25 成都光明光电股份有限公司 Optical glass, glass preform or optical element prepared from optical glass, and optical instrument
CN110835227A (en) * 2018-08-17 2020-02-25 成都光明光电股份有限公司 Optical glass, glass preform or optical element prepared from optical glass, and optical instrument
CN110835228A (en) * 2018-08-17 2020-02-25 成都光明光电股份有限公司 Optical glass, glass preform or optical element prepared from optical glass, and optical instrument
CN110835230B (en) * 2018-08-17 2022-07-05 成都光明光电股份有限公司 Optical glass, glass preform, optical element and optical instrument having the same
CN110835232B (en) * 2018-08-17 2022-10-14 成都光明光电股份有限公司 Optical glass, glass preform or optical element prepared from optical glass, and optical instrument
CN110835231B (en) * 2018-08-17 2022-10-18 成都光明光电股份有限公司 Optical glass, glass preform or optical element prepared from optical glass, and optical instrument

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