TW201206856A - Optical glass, preform and optical element - Google Patents

Abstract

This invention provides an optical glass, a preform using the same and an optical element with a refractivity index (nd) and Abbe number (ν d) within an expected range, a less partial dispersion ratio (θ g, F) and an increased visible light transparency. The optical glass of this invention contains SiO2 content, at least one ingredient selected from the group consisting of Ta2O5, Nb2O5, Na2O, and BaO contents, and the relationship of partial dispersion ratio (θ g, F) and Abbe number (ν d) at ν d ≤ 25 satisfies (-0.00160× ν d+0.63460) ≤ (θ g,F) ≤ (-0.00563×ν d+0.75573), while at ν d ≤ 25 satisfies (-0.00250× ν d+0.65710) ≤ ((θ g,F) ≤ (-0.00340×ν d+0.70000).

Description

201206856 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to an optical glass, a preform, and an optical element. [Prior Art] An optical system such as a digital camera or a video camera includes a paste called aberration, but has a different size. The image difference is a monochromatic difference and a chromatic aberration, and in particular, the chromatic aberration closely depends on the material properties of the lens used in the optical system. In general, the chromatic aberration is corrected by combining a low-dispersion convex lens with a high-dispersion concave lens, but this combination can correct only the aberration between the red region and the green region, and the aberration of the blue region remains. The aberration of the blue region which cannot be completely removed is referred to as a secondary spectrum. In order to correct the secondary spectrum, it is necessary to carry out the optical design of the movement of the g-line (435.835 nm) of the reference blue region. At this time, a partial dispersion ratio (0g, F) is used as a reference for the optical characteristics of the optical design. In the above optical system combining a low dispersion lens and a high dispersion lens, the lens on the low dispersion side uses an optical material having a larger partial dispersion ratio (0g, F), and the lens on the high dispersion side uses a partial dispersion ratio (Θ§, 〇 Smaller optical material, whereby the secondary spectrum can be well corrected. The partial dispersion ratio (eg, f) is represented by the following formula (1): 6g » F=(ng-nF)/(nF-nc). .....(1) In optical glass, there is a general linear relationship between the partial dispersion ratio (0g 'F) and the Abbe number (Vd) indicating the partial dispersion of the short-wavelength band. The axis uses a partial dispersion ratio (0g, F), and the horizontal axis uses the orthogonal coordinates of the Abbe number (vd) to link the partial dispersion ratio of the plotted milk B and the punch 2 to the 2 points of the Abbe number. The straight line is called the regular line I56904.doc 201206856 line) (refer to Figure 1). The standard glass that becomes the basis for the regular line varies according to each optical glass manufacturer, but each company is almost always defined by the same slope and intercept. (NSL7 and PBM2 are optical glass manufactured by 〇hara Co., Ltd., the Abbe number (vd) of PBM2 is 36.3, and the partial dispersion ratio (eg, F) is 0.5 828 'The Abbe's number (vd) of NSL7 is 60.5. The partial dispersion ratio (eg, F) is 0.5436. Here, as the glass having high dispersion, for example, optical glasses as disclosed in Patent Documents 1 to 3 are known. [Prior Art Document] [Patent Document 1] [Patent Document 1] Japanese Laid-Open Patent Publication No. 2009-179522 [Patent Document 2] International Publication No. 2004/110942 [Patent Document 3] Japanese Patent Laid-Open No. 2004-161598 [Invention] [Problems to be Solved by the Invention] However, in the glass disclosed in Patent Documents 1 to 3, the partial dispersion ratio is not sufficiently small 'in the case of using the lens for correcting the secondary spectrum'. Further, the glass disclosed in Patent Documents 1 to 3 is not sufficiently transparent to visible light, and is particularly insufficient for use in transmitting visible light. Namely, it is necessary to have a high dispersion 'partial dispersion ratio (0g, F) which is small and has transparency to visible light. The present invention is versatile in the above problems, and its purpose is to obtain a refractive index (nd) and an Abbe number (Vd) within a desired range, and a partial dispersion ratio (Gg 'F) is small and transparent to visible light. In order to solve the above problems, the inventors of the present invention have repeatedly conducted experimental research to solve the above problems, and found that the optical glass of the optical fiber is improved by the use of the 156904.doc 201206856. The Si〇2 component and the group selected from the group consisting of a Dingxin component, a Nb2〇5 component, a Ν&2〇 component, and a Ba〇 component, and the content thereof is set within a specific range. The present invention has been achieved by achieving a high refractive index and high dispersion of glass, and having a desired relationship between the partial dispersion ratio (0g, F) and the Abbe number (vd) of the glass and lowering the color of the glass. Specifically, the present invention provides the following. (1) An optical glass comprising a Si〇2 component and at least one selected from the group consisting of a Ta2〇5 component, a Nb2〇5 component, a Na2〇 component, and a BaO component, and a partial dispersion ratio (9g' F) and Abbe number (Vd) satisfy within the range of Vd^25 (_〇.〇〇16〇~(1+〇.6346〇)$(0§,〇$(-〇.〇〇563&gt ; < vd + 0.75573) The relationship between (_0, 0025 〇 XVd + O.6571O) $ (0g' F) $ (-0.00340xvd + 0.70000) is satisfied within the range of Vd > (1) The optical glass of the above-mentioned (1) is contained in an amount of 60.0% or less of the Si〇2 component and 25.0% or less of the Ta205 component in terms of mol% of the glass composition of the oxide-converted composition. (3) As described above (1) Or the optical glass of (2), which contains 20.0 to 60.0% of Si〇2* minutes and 2-15 to 25.0% of Ta205 components in terms of mol% of the total glass mass of the oxide conversion composition. The optical glass according to any one of the above (1) to (3), which contains 20.0 to 60.0% of the Si〇2 component in mol% with respect to the total mass of the glass in terms of oxide conversion, and is selected from the group consisting of Ta2〇 5 components, Nb2〇5 components, N The a2 〇 component 156904.doc 201206856 is 20.0% or less and the sum of the content of one or more of the group consisting of BaO components is 50.0% or less. (5) The optical glass of the above (4), which is composed with respect to oxide The total mass of the glass is in the range of 0 to 25.0% of the Ta205 component and/or 0 to 30.0% of the Nb205 component and/or 0 to 30.0% of the Na20 component and/or 0 to 30.0%. (6) The optical glass according to any one of the above (1) to (5), which further contains, in terms of % by mole, of the total mass of the glass of the composition of the telluride. <^205 component and/or 0~20.0% of TiO2 component and/or 0~10.0% of Bi203 component and/or 0~10.0% of W03 component. (7) Optical glass as described in (6) above , wherein the oxide ratio conversion composition of the molar ratio (Nb205 + Ta205) / (Ti02 + Bi2 〇 3 + W03) is greater than 2.50. (8) The optical glass of (6) or (7) above, wherein the oxide is composed of an oxide The optical ratio of the optical glass according to any one of the above (1) to (8), which is relative to oxidation, is a molar ratio of Nb 205 + Ta 205 + Na 20 + Ba 0 / (Ti02 + Bi 203 + W03 ). Object conversion group The total mass of the glass, in terms of mole %, further comprises: 0 to 3 0.0% of the Li20 component and/or 0 to 30.0% of the Na20 component and/or 0 to 20.0% of the K20 component and/or 156904.doc - 6- 201206856 0~10·0% of Cs20 ingredients. (10) The optical glass of the above (9), wherein the content of the Rn2〇 component (wherein, the ceramium is one or more selected from the group consisting of Li, Na, K, and Cs) is relative to the oxide (1) The optical glass according to any one of the above (1) to (10), wherein the composition of the oxide is Mo ratio Ta205/(Li20) +Na20) is 0.010 or more and 〇5〇〇 or less. (12) The optical glass according to any one of the above (1) to (11), which further comprises, in mol%, of a total mass of the glass of the oxide-converted composition: 0 to 15.0% of the MgO component and/or Or 0 to 20.0% of the CaO component and/or 0 to 20.0% of the SrO component and/or 0 to 30.0 °/. The 8 & 0 component and / or 0 to 30.0% of the ZnO component. (13) The optical glass according to the above (12), wherein the content of the RO component (wherein R is one or more selected from the group consisting of Mg'Ca, Sr, and Ba'Zn) is relative to the oxide The total mass of the glass of the converted composition is 3 0 ·〇% or less. (14) The optical glass according to the above (1) to (13), which is in the form of a molar mass relative to the total mass of the glass in terms of oxide conversion. Further, it contains: 0 to 20.0% of the P205 component and/or 0 to 30.0% of the B2〇3 component and/or 0 to 20.0% of the GeO^ component. The optical glass of any one of the above (1) to (14), wherein the sum of the total mass of the glass relative to the composition of the oxide (Si02+P2〇5+B2C>3+ Ge02) ) is 20.0% or more and 60.0% or less. (16) The optical glass according to any one of the above (1) to (15), which further comprises, in mol%, of the total mass of the glass in terms of oxide conversion: 0 to 30.0% of 丫2〇3 Composition and / or 0 ~ 3 0.0 ° /. The La203 component and/or the 0 to 30.0% Gd203 component and/or the 0 to 20.0% Yb203 component and/or the 0 to 10.0% Lu2〇3 component. (17) The optical glass according to the above (16), wherein the content of the Ln203 component (wherein Ln is one or more selected from the group consisting of Y, La, Gd, Yb, and Lu) is relative to the oxide The total mass of the glass of the converted composition is 30.0% or less. (18) The optical glass according to any one of the above (1) to (17), which further contains, in mol%, of 0 to 30.0% of the Te02 component and/or Or 0~20.0% of Al2〇3 component and/or 0~20.0% of Ga203 component and/or 0~20.0% of Ιη203 component and/or 0~20.0% of Zr02 component and/or 0~1.0% of Sb203 component And / or 0 ~ 1.0% of Ce02 ingredients. (19) The optical glass of any one of the above (1) to (18) which has a refractive index (nd) of 75.75 156904.doc 201206856 or more and 2.00 or less, and has an Abbe number of 20 or more and 40 or less ( The optical glass according to any one of the above (1) to (19), wherein the spectral transmittance shows a wavelength of 70% (λ7 〇) of 500 nm or less. (21) The optical glass according to any one of (1) to (20) above which does not cause devitrification and opalescence before the reheat test (4), [reheat test (<): test piece 15 Mm><15 mm><30 mm test piece was reheated, and it took 150 minutes to raise the temperature from room temperature to a temperature higher than the transfer temperature (Tg) of each sample by 80 ° C to 150 ° C. The glass transition temperature (Tg) of the glass is kept at a temperature of 80 ° C to 150 ° C for 30 minutes, and then naturally cooled to ten temperatures. After the opposite sides of the test piece are ground to a thickness of 1 〇 mm, the thickness is performed. Visual observation]. (22) A preform for a polishing process and/or a precision press molding, comprising the optical glass according to any one of the above (1) to (21). (23) An optical element which is obtained by grinding and/or grinding an optical glass according to any one of the above (丨) to (2). (24) An optical element which is as described above (丨) The optical glass according to any one of (21) is subjected to precision press molding. [Effects of the Invention] According to the present invention, the Si〇2 component is used in combination with the component selected from the publication 2〇5, and the Nb2〇5 component. One or more of the group consisting of the core 2 〇 component and the Ba 〇 component, and the content of ruthenium or the like is set within a specific range, and the high refractive index and high dispersion of the glass can be achieved, and the partial dispersion ratio of the glass is m. It has a desired relationship with the Abbe number (vd) and can reduce the color of the glass. 156904.doc 201206856 Therefore, the refractive index (nd) and the Abbe number (Vd) can be obtained within a desired range, and An optical glass having a small color difference and improved transparency to visible light, a preform using the same, and an optical element. [Embodiment] The optical glass of the present invention contains a Si 〇 2 component, and is selected from a Ta 205 component, Nt»2 〇 5 One of a group consisting of a component, a NazO component, and a Ba〇 component 'And the partial dispersion ratio (0g 'F) and the Abbe number (Vd) satisfy within the range of vdS25 (-〇.〇〇16〇>^(1+〇.6346〇)$(;0经, ?)$(;-〇.〇〇563>< vd+0.75573) The relationship 'in the range of Vd>25 (-0.00250xvd+ 0.65710) each (0g, F)$(-〇.〇〇34〇 The relationship of xvd+0.70000) is particularly preferably 'the total mass of the glass with respect to the oxide conversion composition, and the content of Si〇2 of 60.0% or less and the Ta205 of 25.0% or less by Mohr/〇" The Si〇2 component and one or more selected from the group consisting of a Ta2〇5 component, a Nb2〇5 component, a NazO component, and a BaO component, and the content is set within a specific range to make the glass more High dispersion, and make the partial dispersion ratio (0g, F) close to the regular line, and reduce the color of the glass. Therefore, 'the Abbe number (vd) with 30 or less can be obtained, and the color difference is small and especially for visible light. Optical glass having improved transparency of light on the short-wavelength side, preforms and optical elements using the same. Hereinafter, the embodiment of the optical glass of the present invention is The present invention is not limited to the following embodiments, and may be appropriately modified and implemented within the scope of the object of the present invention. Further, where the description is repeated, the description will be appropriately omitted. However, the gist of the invention is not limited. 0 156904.doc • 10-201206856 [Glass component] The composition range of each component constituting the optical glass of the present invention is described. In the present specification, the content of each component is not specifically described. The feelings of '(4)' are all set to the total mass of the glass in terms of oxide conversion. <Moer' is not the case. Here, the term "the oxide-converted composition" means a composition in which an oxide, a composite salt, a metal fluoride or the like which is used as a raw material of the glass constituent component of the present invention is decomposed and melted into an oxide. In the case of the barrier, the total mass of the generated oxide is (10) mol%, and the composition of each component contained in the glass is indicated. , <About essential components, arbitrary components>

The Si〇2 component is a glassy-filament compound and is a component useful for forming a skeleton of glass. In particular, by setting the content of the component to be 60.0% or less, it is possible to easily obtain a light which is difficult to reduce the refractive index of the glass and has a desired refractive index. Therefore, the content of the Si 〇 2 component is preferably from 6 〇 % to the upper limit, more preferably from 55.0%, and most preferably from 5 〇〇 %, based on the total mass of the glass of the oxide conversion composition. On the other hand, by setting the content of the Si 2 component to 20 % by weight or more, the network structure of the glass is increased to the extent that stable glass is obtained, so that the glass devitrification property can be improved. Therefore, the content of the SiO 2 component is preferably 20.0% as the lower limit, more preferably 25 〇% as the lower limit, more preferably 30.0% as the lower limit, and most preferably 35 5%. 〇% is the lower limit. The component can be contained in the glass using, for example, SiO 2 , K 2 SiF 6 or Na 2 SiF 6 # as a raw material. The optical glass of the present invention contains a component selected from the group consisting of TkO5, Nb2〇5, 156904.doc •11·201206856

One or more of the group consisting of a Na2〇 component and a BaO component. Thereby, a component which lowers the partial dispersion ratio (eg, F) of the glass is contained, so that a desired lower partial dispersion ratio can be easily obtained. In particular, when the sum of the contents is 20.0% or more, the effect becomes remarkable. Therefore, the sum of the contents (Nb2〇5+Ta2〇5+Na2〇+BaO) is preferably 20.0% as the lower limit, more preferably 25 〇%, as the lower limit, more preferably Preferably, the lower limit is 28.0%, and the lower limit is preferably 3〇〇%, and the best is 33.5%. On the other hand, by setting the sum of the contents to be 60.0% or less, the stability of the glass can be improved, and the devitrification resistance of the glass can be improved. Further, since the content of the glass forming component can be increased, the viscosity of the optical glass can be improved and the pressurization can be easily performed. Therefore, the sum of the contents (Nb2〇5+Ta2〇5+Na2〇+Ba〇) is preferably an upper limit of 50.0%, more preferably an upper limit of 45〇%, based on the oxide-converted composition. The best is the upper limit of 43.0%.

The Ta2〇s component is used to increase the refractive index of the glass and reduce the composition of the glass's devitrified warm shoulder. Further, the Ta2〇5 component imparts a desired lower chromatic dispersion ratio (0g, F) to the glass, and makes it difficult for the glass to produce a colored component. In particular, by setting the content of the Ta2〇5 component to 25 % by weight or less, the devitrification resistance of the glass can be maintained. Therefore, the content of the component of the Ta2〇5 component relative to the oxide-converted glass whole mass is preferably an upper limit of 25. G%, more preferably an upper limit of 2 〇 (10), and most preferably a 〇% of 15. Upper limit. The other party may not make the component 'but by setting the content of the Ta 2 〇 5 component to y% or more, it is possible to impart a desired lower portion to the glass while imparting high refractive index and high dispersion characteristics to the glass. Dispersion ratio (eg, F). Therefore, the 156904.doc -12-201206856 content of the bismuth component is preferably 〇. 1% as the lower limit, more preferably 1.0% as the lower limit, and more preferably 2.15%. For the lower limit, the best is 2.7% as the lower limit. The Ta205 component can be contained in the glass using, for example, Ta205 or the like as a raw material.

The Nb2〇5 component is a component which increases the refractive index and dispersion of the glass and lowers the partial dispersion ratio (eg'f) of the glass, and is an arbitrary component in the optical glass of the present invention. In particular, by reducing the devitrification of the glass by setting the content of the Nb2〇5 component to 30.0% or less, optical light having optical transparency can be easily obtained. Further, the content of the Nb205 component was set to 30.〇〇/. In the following, the coloring caused by the Nb2〇5 component is lowered, so that a glass having high transparency to visible light can be obtained. Therefore, the content of the component of the 'Nb»2〇5 component is preferably an upper limit of 3〇〇%, more preferably an upper limit of 25.0%, and most preferably an upper limit of 20%. . Further, even if the bismuth 5 component is not contained, a glass having desired characteristics can be obtained, but by containing 1.0% or more of Nt>2〇5 component, the refractive index and dispersion can be improved, and the film can be easily obtained. Partial dispersion ratio (0g, F) of the normal line. Therefore, the content of the Nb2〇5 component is preferably 1·〇% as the lower limit, more preferably 5,〇% is the lower limit, and most preferably 8.0% as the lower limit. The Nb2〇5 component can be contained in the glass using the example wNb2〇5 or the like as a raw material.

The Ti〇2 component is a component which reduces the Abbe number while raising the refractive index of the glass, and is an optional component in the optical glass of the present invention. In particular, by setting the content of the Ti〇2 component to 20.0% or less, the coloring to the glass can be lowered, and in particular, the internal transmittance of the short-wavelength region (under 500 nm) of visible light can be made 156904.doc -13 - 201206856 deterioration. Further, the content of the Ti〇2 component was set to 20 0. The partial dispersion ratio (eg, F) becomes difficult to rise, so that a partial dispersion ratio (0g, F) close to the regular line can be easily obtained. Therefore, the amount of the Ti 2 component is preferably 20.0% as the upper limit, more preferably 15% by weight, and most preferably 1% by weight, based on the total mass of the glass. Further, in the present invention, even if the Ti 2 component is not contained, an optical glass having desired optical characteristics can be obtained, but the composition of the refractive index and dispersion of the & The amount of the glass is increased, so that the resistance to devitrification of the glass can be further improved. Therefore, the content of the Ti〇2 component is preferably more than 〇% based on the total mass of the glass in terms of oxide conversion composition, more preferably 0.1% as the lower limit, and most preferably 〇5% as the lower limit. The Ti 2 component can be contained in the glass using, for example, Ti 2 as a raw material.

The Biz〇3 component is a component which increases the refractive index of the glass and lowers the glass transition point (Tg), and is an optional component in the optical glass of the present invention. In particular, by setting the content of the Bi2〇3 component to 1% by weight or less, the color of the glass can be lowered, and the internal transmittance of the glass can be improved. Further, by setting the content of the 2〇3 component to 1 〇.〇% or less, it is difficult to increase the partial dispersion ratio (0g, f) of the glass. Therefore, the content of the Biz 〇 3 component is preferably 10.0% as the upper limit, more preferably 8 〇% as the upper limit, and most preferably 5.0% as the upper limit. Then, the 2〇3 component can be contained in the glass using, for example, 2〇3 or the like as a raw material. The W03 component is a component which increases the refractive index and dispersion of the glass and lowers the devitrification temperature of the glass, and is an optional component in the optical glass bottle of the present invention. In particular, by setting the content of the W〇3 component to 10,0% or less, it is possible to particularly deteriorate the transmittance of the short wavelength region (below 500 nm) of 156904, doc •14·201206856 light. Further, by setting the content of W 〇 3 to 丨〇 or less, it is difficult to increase the partial dispersion ratio (0g F) of the glass. Therefore, the content of the WO3 component is preferably an upper limit of 1% 相对% with respect to the total mass of the glass in terms of an oxide conversion composition, more preferably an upper limit of 8.0%, and most preferably an upper limit of 5.0%. The W〇3 component can be used, for example, WO3 is used as a raw material and is contained in the glass. The optical glass of the present invention preferably has a ratio of the sum of the content of the Nb2〇5 component and the Ta2〇5 component to the sum of the content of the Ti〇2 component, the 2〇3 component and the w〇3 component of more than 2.00. Therefore, in increasing the refractive index and dispersion of the glass, the content of the component which reduces the partial dispersion ratio of the glass is increased, so that the desired refractive index and dispersion can be obtained, and a lower partial dispersion can be easily obtained. The molar ratio (Nb205+Ta205)/(•〇2812〇3憎〇3) of the oxide conversion composition is preferably more than 2〇〇, more preferably more than 25〇, more preferably 2.55 as the lower limit, and the best is Take 2 6 〇 as the lower limit. On the other hand, the upper limit of the molar ratio is not particularly limited, but in most cases, the glass obtained by the present invention is converted into a molar ratio (10).

Bl203+W〇3) is 30.00 or less, more detailed is 28〇〇 or less, and more detailed is 2 7. 〇 〇 below. The optical glass of the present invention preferably has a ratio of the sum of the content of the Nb2〇5 component, the ringing component, the barium component, and the BaO component to the sum of the content of the Ti〇2 component, the component, and the component of 34 () or more. 5 please below. In particular, by increasing the content of the component which lowers the partial dispersion ratio of the glass by the ratio of the β 亥 3.4 to 3.40 or more ′, the desired refractive index and dispersion can be obtained, and a lower partial dispersion ratio can be easily obtained. . Therefore, the oxide conversion group 156904.doc .15 - 201206856 molar ratio (Nb205 + Ta205 + Na20 + Ba0) / (Ti02 + Bi203 + W03) is preferably 3.40 as the lower limit, more preferably 3 5 〇. The lower limit is more preferably 4.00 as the lower limit, and more preferably 4 5 〇 as the lower limit. The molar ratio (Nb205 + Ta205 + Na20 + Ba0) / (Ti02 + Bi203 + W03) of the oxide-converted composition is preferably at a lower limit of 7.00 from the viewpoint of obtaining a glass having a lower partial dispersion ratio. On the other hand, by setting the ratio to 50.00 or less, the amount of the component for increasing the refractive index is increased, so that the desired refractive index can be obtained, and the devitrification resistance of the glass can be improved (for example, the liquidus temperature is lowered). ). Therefore, the molar ratio of the oxide ratio (Nb2〇5+Ta2〇5+Na2〇+

BaO)/(Ti02+Bi2〇3+W03) is preferably an upper limit of 50.00, more preferably an upper limit of 48.00', and the upper limit is 45. Here, 'in particular, in terms of obtaining a glass having less coloration, it is preferable to increase the ratio of the content of the Ta2〇5 component with respect to the sum of the contents of the Nt»2〇5 component and the Ding&2〇5 component. . In this case, the molar ratio (Ta2〇5)/(Nb2〇5 + Ta2〇5) of the oxide-converted composition is preferably 〇·〇ι as the lower limit, and more preferably 〇.〇5 as the lower limit' More preferably, the lower limit is 0.10, and the lower limit is 〇14.

The LizO component is a component which reduces the partial dispersion ratio of the glass, F), lowers the devitrification temperature of the glass, and lowers the glass transition point (D), and is an optional component in the optical glass of the present invention. In particular, by reducing the content of the Li2 bismuth component to 30.0% or less, the devitrification of the glass due to the excessive Li2 bismuth component can be reduced. Further, since the devitrification resistance at the time of reheating is improved, the press formability of the glass can be improved. Therefore, the content of the Li20 component is preferably an upper limit of 3 〇.〇% with respect to the oxide-based composition, and more preferably 156904.doc 16 · 201206856 25·0% is the upper limit. 20.0% is the upper limit. Furthermore, optical glass having desired physical properties can be produced even without the LhO component, but the glass transition point (Tg) is ensured and the partial dispersion ratio (0g, F) of the glass is easily adjusted to From the viewpoint of the desired lower value, the content of the Li 2 〇 component is preferably 0.1% as the lower limit, more preferably 1% by weight, and more preferably the lower limit of the glass composition. Taking 4 〇% as the lower limit 'best is 7.0% as the lower limit. The LhO component can be contained in the glass using, for example, Li2C03, LiN03, LiF or the like as a raw material.

The NazO component is a component which lowers the partial dispersion ratio of the glass, f), improves the chemical stability of the glass, particularly the water resistance component, and is a component which lowers the glass transition point (Tg), and is an optional component in the optical glass of the present invention. In particular, since the molecular weight of the NhO component is larger than that of the LhO component described below, the decrease in the partial dispersion ratio of an average of 1 mole can be increased, and it is difficult to lower the refractive index or stability of the glass compared to the Li2〇 forming. Therefore, it is suitable as a reduction. P is a component of the dispersion ratio (0g, F). On the other hand, by setting the content of the component to be 30.0% or less, the stability of the glass is improved, so that the component containing excess NaaO can be reduced. The glass is destructed. Further, since the devitrification resistance is improved at the time of reheating, the press formability of the glass can be improved. Therefore, the content of the NkO component is preferably 30.0% as the upper limit, more preferably 25 Å ()/, based on the oxide-converted composition. The upper limit is more preferably 22.0%, and the best is 19%. Further, in the present invention, even if the NhO component is not contained, an optical glass having a desired physical property can be produced, but the partial dispersion ratio (eg, F) of the glass is further increased as described above, and the refraction of the glass is further improved. Rate and resistance to devitrification. 156904.doc 17 201206856 Point and §, preferably containing Na2〇 component. In this case, the content of the ν^ο component is preferably 0.1% as the lower limit, more preferably 丨.0% as the lower limit, and more preferably 5% by weight, based on the oxide-converted composition. The lower limit 'best is 8.0% as the lower limit. The Naw component can be contained in the glass using, for example, Na2C03, NaN03, NaF, Na2SiF6 or the like as a raw material. The bismuth component is a component which lowers the glass transition point (Tg) and is an optional component in the optical glass of the present invention. In particular, by setting the content of the K2 bismuth component to 20.0% or less, devitrification of the glass due to the excessive ruthenium component can be reduced. Further, since the devitrification resistance at the time of reheating is improved, the press formability of the glass can be improved. Therefore, the content of the Κ2〇 component is preferably an upper limit of 2 〇 〇%, more preferably 10·0 。, based on the total mass of the glass of the oxide conversion composition. For the upper limit, it is better to be 5.0. /. The upper limit. The component can be contained in the glass by using, for example, K2C〇3, ΚΝ〇3, KF, KHF2, K2SiF6 or the like as a raw material.

The ChO component is a component which lowers the glass transition point (Tg) and is an optional component in the optical glass of the present invention. In particular, by reducing the content of the Cs2 bismuth component to 10.0% or less, the devitrification of the glass caused by the excessive Cs2 strontium component can be reduced. Therefore, the content of the CszO component is preferably an upper limit of 1% by weight, more preferably an upper limit of 8 %, more preferably an upper limit of 5.0%, and a Cs2 composition. For example, Cs2C〇3, CsN〇3 can be used as a raw material and contained in the glass. The optical glass of the present invention preferably has a Rn2 〇 component (wherein the ruler 11 is one or more selected from the group consisting of Li, Na, K, and Cs) and the sum of the contents is 156904.doc -18 - 201206856 10.0 % or more below 55_0%. In particular, it is possible to obtain a glass which is easier to press-form by lowering the glass transition point (Tg) by setting the sum to 1% or more. Therefore, the total content of the RhO component is preferably 1 〇.0% as the lower limit, more preferably 15 〇% as the lower limit, and more preferably 20.0% as the lower limit. Jia is at the lower limit of 22.5%. On the other hand, by setting the mass sum to 55.0% or less, it is possible to suppress the glass from being devitrified and to facilitate the vitrification. Therefore, the mass of the content of the RhO component and the total mass of the glass relative to the oxide-converted composition are preferably an upper limit of 55% by weight, more preferably an upper limit of 50.0%, and even more preferably an upper limit of 43% by weight. More preferably at 40.0 ° /. The upper limit 'best is the upper limit of 35 〇%. Further, in the optical glass of the present invention, the ratio of the content of the Τ & 2 〇 5 component to the sum of the contents of the LisO component and the Na 2 〇 component is preferably 〇 〇 1 〇 or more 〇 5 〇〇 or less. In particular, by setting the ratio to 0 or more, the devitrification resistance of the glass can be improved, and the devitrification and whitening of the glass when reheating can be reduced. On the other hand, by setting the ratio to 0 5 or less, the devitrification caused by the excessive ratio of the ratio can be reduced. Therefore, the molar ratio of the oxide composition is Ta^/CLkO+Na2. Preferably, 〇_〇1〇 is the lower limit, more preferably 〇〇4〇 is the lower limit, and most preferably 0.070 is the lower limit. On the other hand, the molar ratio Ta205/(U20+Na20) is preferably an upper limit of 〇.5〇〇, more preferably an upper limit of 〇48〇, and most preferably an upper limit of 0.470.

The MgO component is a component which lowers the melting temperature of the glass, and is an S component in the optical glass of the present invention. In particular, by setting the content of the Mg bismuth component to 15.0% or less, the chemical stability of the glass can be improved while obtaining a desired high refractive index, and the devitrification resistance of the glass can be improved. Therefore, the content of Mg 156904.doc 201206856 is preferably 15.0 °/ relative to the total mass of the glass in terms of oxide conversion composition. The upper limit is more preferably 10.0%, and most preferably 5 〇%. The MgO component can be contained in the glass using, for example, Mg〇, MgC〇3, Mgr! or the like as a raw material.

The CaO component is a component which lowers the devitrification temperature of the glass and is an optional component in the optical glass of the present invention. In particular, the content of the Ca 〇 component was set to 20.0 ° /. Hereinafter, the chemical stability of the glass can be improved while obtaining a desired high refractive index, and the devitrification resistance of the glass can be improved. Therefore, the content of the Ca 〇 component is preferably 20.0% as the upper limit, more preferably 15. 〇% as the upper limit, and most preferably 1 〇〇% as the upper limit. The CaO component can be contained in the glass by using, for example, CaC〇3, ruthenium or the like as a raw material.

The SrO component is a component which lowers the devitrification temperature of the glass and adjusts the refractive index of the glass, and is an arbitrary component in the optical glass of the present invention. Especially by

The content of the SrO component is set to 20.0% or less, and the devitrification resistance of the glass can be improved while obtaining a desired high refractive index. Therefore, the content of the Sr〇 component is preferably an upper limit of 2% by weight based on the total mass of the glass in terms of an oxide conversion composition, more preferably an upper limit of 15·0°Λ, and most preferably 1% by weight. The upper limit ^ Sr 〇 component can be contained in the glass using, for example, Sr(N〇3) 2, SrF 2 or the like as a raw material.

The BaO component is a component which reduces the partial dispersion ratio (θ §, F) of the glass, improves the devitrification resistance of the glass, and adjusts the optical constant of the glass, and is an arbitrary component in the optical glass of the present invention. In particular, the content of the Ba〇 component was set to 30.0/. In the following, the devitrification resistance of the glass can be mentioned. Further, by setting the content of 156904.doc •20-201206856 to 3〇·〇〇/0 or less, the devitrification resistance of the glass can be improved. Therefore, the content of the BaO component is preferably 30.0% as the upper limit, more preferably 2 〇 〇 % as the upper limit, and most preferably 10.0% as the upper limit. The Ba〇 component can be contained in the glass by using, for example, Bac〇3 or Ba(N03)^ as a raw material, and the β ΖηΟ component is a component for lowering the devitrification temperature of the glass and lowering the glass transition point (Tg) as the optical glass of the present invention. Any component. In particular, by setting the content of the ZnO component to 3 % by weight or less, the desired high refractive index can be obtained while improving the chemical stability of the glass. Therefore, the content of the ZnO component is preferably an upper limit of 3 〇·〇% with respect to the total mass of the glass in terms of an oxide conversion composition, more preferably 20.0% as an upper limit, and most preferably 10.0% as an upper limit. The ZnO component can be contained in the glass by using, for example, Ζη〇, ΖηΙ?2 or the like as a raw material. In the optical glass of the present invention, the R〇 component (wherein the ruler is selected from

As described above, the above-mentioned group of Zn 'Mg, Ca, Sr, and Ba is a component which is useful for improving the devitrification resistance of the glass and adjusting the refractive index. However, if the total content of the RO components is too large, Then, the resistance to devitrification of the glass becomes easy to change, and the refractive index of the glass also becomes easy to decrease. Therefore, the total content of the components is preferably an upper limit of 30.0% with respect to the total mass of the glass in terms of the oxide-converted composition, and more preferably an upper limit of 2 〇%, and most preferably an upper limit. The p2〇5 component is a composition for improving the stability of the glass, and is an optional component in the optical glass of the present invention. In particular, by setting the content of the P2〇5 component to 20.0%, the devitrification tilting 156904.doc-21/201206856 caused by the excessive component is lowered, so that the stability of the glass can be improved. therefore,? The content of the 2〇5 component is preferably an upper limit of 20% by weight based on the oxide-converted composition, more preferably 1%·0%, and most preferably 5%%. For the ρ2〇5 component, for example, a1(p〇3)3, Ca(p〇3)2, Ba(pc>3)2, ΒΡ**, and H3PO4 can be used as a raw material and contained in the glass. The Βζ〇3 component is a glass-forming oxide and is a component useful for forming a skeleton of glass, and is an optional component in the optical glass of the present invention. In particular, it is difficult to reduce the refractive index of the glass by reducing the content of the B2〇3 component to 50.0% or less, and the internal transmittance of the short-wavelength region of visible light is hard to deteriorate. Therefore, the content of the B2〇3 component is preferably 30.0% as the upper limit, more preferably 20.0% as the upper limit, and more preferably 15,0°/%. The upper limit 'best is 1 〇 〇% is the upper limit. In particular, from the viewpoint of lowering the partial dispersion ratio, the content of the cerium component is preferably an upper limit of 3 〇〇% with respect to the total mass of the glass composition of the oxide converter, and more preferably an upper limit of 20.0%. Jia is capped at 14.5%. The component g2〇3 can be contained in the glass using, for example, Η3Β〇3, Na2B407, Na2B407·ι〇η2〇, ΒΡ〇4 or the like as a raw material.

The Ge 〇 2 component is a refractive index of the glass, and stabilizes the glass to lower the devitrified component when it is formed. ’ is an optional component in the optical glass of the present invention. In particular, by setting the content of the Ge 〇 2 component to 20.0% or less, the amount of the expensive Ge 〇 2 component is lowered, so that the material cost of the glass can be reduced. Therefore, the content of the 'Ge〇2 component is preferably 20.0% as the upper limit, more preferably 10.0% as the upper limit, and most preferably 5.0% as the upper limit. The Ge〇2 component can be contained in the glass using, for example, Ge〇2 or the like as a raw material 156904.doc -22-201206856. Further, the optical glass of the present invention preferably has a combination of the content of the Si 〇 2 component ' P 2 〇 5 component, the B 2 〇 3 component, and the Ge 〇 2 component of 2% by mass or more and 6 % by weight or less. The sum of the contents is 20.0% or more, and the increase of the partial dispersion ratio (0g 'F) can be suppressed, so that the low partial dispersion ratio (eg, F) e of the reverse normal line desired by the present invention can be easily obtained. The stability is improved, so that the devitrification resistance of the glass can be improved. Therefore, the quality of the glass and the mass of (SiC^+P^s+ic^+GeO2) relative to the oxide-converted composition is preferably 20.0% as the lower limit, more preferably 3%% as the lower limit, and most preferably The lower limit is 35.0%. On the other hand, the sum of the contents is 60.0 〇 /. In the following, it is difficult to reduce the refractive index and the Abbe number, so that a desired high refractive index and high dispersion can be easily obtained. Therefore, the mass and the total mass of the glass relative to the oxide-converted composition are preferably 60.0%, more preferably 55 〇%, and most preferably 50.0%.

The La2〇3 component and the Gd2〇3 component are arbitrary components which increase the refractive index of the glass while improving the Abbe number of the glass. Further, the γ 2 〇 3 component is an optional component for improving the glass devitrification property while improving the glass = refractive index. In particular, the content of the La203 component, the Gd2〇3 component, and the γ2〇3 component is set to be 30.0% or less, respectively, so that the devitrification resistance of the glass can be improved, and the dispersion of the glass can be hardly lowered. Therefore, the content of each of the La2〇3 component, the Gd2〇3 component, and the γ2〇3 component is more preferably the upper limit and the second upper limit with respect to the glass total limit of the oxide conversion composition. 1^2〇3 component, 〇3 component, and 丫2〇3 component can be used, for example, 56904.doc •23- 201206856

La203, La(N03)3 · XH2〇 (x is an arbitrary integer), Gd2〇3, GdF3, Y2〇3, YF3, etc. as raw materials e

The Yt>2〇3 component is an arbitrary component that achieves a high refractive index and an improvement in hardness or Young's modulus. In particular, by setting the content of the Yt>2〇3 component to 20.0% or less, or by setting the content of the LU2〇3 component to 1% by weight or less, it is possible to suppress the decrease in the dispersion of the glass and to improve the resistance during the formation of the glass. Devitrification. Therefore, the content of the iridium 3 component relative to the total mass of the glass in terms of the oxide-converted composition is preferably 20.0%, and more preferably 1% by weight, and most preferably 5.0%. Further, the content ratio of the LU2〇3 component to the total mass of the glass in terms of oxide conversion is preferably an upper limit of 1% ,%, more preferably an upper limit of 8.0%, and most preferably an upper limit of 5%. For the Yb2〇3 component and the LhO3 component, for example, Yb2〇3, lU2〇3, or the like can be used as a raw material. The optical glass of the present invention preferably has a content of the LhO3 component (in the formula, which is selected from the group consisting of La, Gd, Y, Yb, and Lu), and the sum of the contents is 30.0% or less. Thereby, the devitrification resistance of the glass can be improved while suppressing the decrease in the dispersion of the glass. Therefore, the sum of the contents of the LhO3 component is preferably an upper limit of 3 〇% with respect to the total mass of the glass of the oxide conversion composition, more preferably 20.0%, and most preferably 1 〇%.

The Te〇2 component is a component which increases the refractive index of the glass and lowers the glass transition point (Tg), and is an optional component in the optical glass of the present invention. In particular, by setting the content of the Te〇2 component to 3 〇% or less, the color of the glass can be lowered, and the transmittance of the glass with respect to visible light can be improved. Therefore, the content of the Teh component is preferably an upper limit of 3〇〇% with respect to the oxide-converted composition, more preferably an upper limit of 20.0%, and most preferably an upper limit of 1〇〇% ^ Te 156904 .doc •24· 201206856 The component can be contained in the glass using, for example, Te〇2 as a raw material. 2 3 knives Ga 2 〇 3 components and Ι π 2 〇 3 components are components for improving the chemical stability of the glass, and are the (four) component of the optical glass of the present invention. In particular, it is possible to increase the glass devitrification property by setting the content of these components to 20% or less. Therefore, the total mass of the glass of the composition of the Α12ο3 component, the Ga203 component, and the 203η203 component is preferably 20.0% as the upper limit, and more preferably 1%% as the upper limit, and most preferably 5 For the upper limit Al2〇3 component, Ga2〇3 component, and Ιιΐ2〇3 component, for example, Al2〇3 'Al(〇H)3 ^ A1F3 > Ga2〇3 'Ga(OH)3 ^ Ιη203 > In(〇H) can be used. 3 is used as a raw material and is contained in glass.

The Zr〇2 component is a component for reducing the refractive index of the glass while reducing the partial dispersion ratio (eg 'f) of the glass. The arbitrary forming of the optical glass of the present invention is especially set by the content of the Zr〇2 component. For 20_0. Below / ,, the liquid temperature of the glass can be lowered and the resistance to devitrification can be improved. Therefore, the content of the bismuth 2 component is preferably 〇% as the upper limit, more preferably 15.01 ⁄4 as the upper limit, and most preferably 1 〇 〇% as the upper limit. Furthermore, the optical glass of the present invention may also contain no Zr〇2 component. M. By containing a Zr〇2 component, it is easier to obtain a lower partial dispersion ratio (0 §, 〇 glass). Therefore, the content of Zr02 component The total mass of the glass relative to the oxide-converted composition may preferably be more than 0%, more preferably 〇1% as the lower limit, and most preferably 0.2% as the limit. For the Zr〇2 component, for example, Zr〇 may be used. 2. ZrF4 or the like is contained in the glass as a raw material.

The Sb2〇3 component is a component which promotes defoaming of glass and purifies the glass, and is an optional component in the optical glass of the present invention. By setting the content of Sb203 to less than 1% by weight relative to the content of 156904.doc •25-201206856::, it is difficult to excessively foam when the glass is melted, and the Sb2〇 is divided into melting equipment (especially It is difficult to alloy the main 2 genus. Therefore, the content of the Sb203 component in terms of oxide is preferably 10% as the upper limit, and (4) is the upper limit, and more preferably (4) is the upper limit. However, when: the influence of glass on the environment, it is better not to contain Sb20 Qin.

Sb2°3' Sb2°5' Na2H2Sb2°7 · 5H2° It is included in the glass. (10) The component is a component of the purified glass, and is a component which adjusts the optical constant of the glass ’ is an arbitrary component in the optical glass of the present invention. In particular, it is preferable that the content of the Ce 〇 2 component is preferably m G % with respect to the oxide-converted composition, and the content of the Ce 〇 2 component is less than 丨〇% or less. More preferably, it is limited to 05%, and the best is 〇.3%. However, when the Ce 〇 2 component is contained, J Valley is likely to absorb at a specific wavelength in the visible light region. Therefore, in the case of obtaining a glass having a particularly high transmittance of visible light, it is preferably substantially not a Ce 〇 2 component. The Ce〇2 component can be contained in the glass using, for example, Ce02 or the like as a raw material. Further, the component for purifying the glass and defoaming is not limited to the above Sb2〇3 component and the Ce〇2 component. A cleaning agent or a defoaming agent known in the field of glass production, or a combination thereof may be used. <Components that should not be contained> Next, the components which should not be contained in the optical glass of the present invention and the components which are not preferable if they are contained are described. 156904.doc -26 - 201206856 In the present invention, the optical chain + _, the slate, within the scope of the characteristics of the non-destructive glass, other components may be added as needed. However, in addition to Ti, niobium, and Nb, V, Cr, Mn, Co, Ni, C Ag, and M. When the transition metal components are individually or in combination, the shape of the glass is colored to absorb the specific wavelength of the visible light region, and therefore, the optical glass having a wavelength of the visible light region is preferably substantially Does not contain the above ingredients. Further, in recent years, various components such as Pb〇 and other compounds, and As2〇3, and various components of Th, Cd, Tb, and Be'Se have been used as harmful substances to control their use. Therefore, not only glass but also In the manufacturing step and the processing after the processing step and the production of the product, it is necessary to take measures in the environmental countermeasures. When it is important to pay attention to the influence of the environment, it is preferable that the treatment is not contained except for the inevitable mixing. Thereby, the optical glass is substantially free of substances that pollute the environment. Therefore, the optical glass can be manufactured, processed and discarded without taking special measures for environmental measures. With respect to the glass which is preferably used as the optical glass of the present invention, the composition thereof is expressed by mol% of the total mass of the glass in terms of oxide composition, and therefore is not directly shown in the description of the mass %. The composition expressed by mass% of each component present in the glass composition of each of the required characteristics is approximately the following value by the oxide conversion composition: 10.0 to 40.0% by mass of the component 2: and 0 to 50.0 %% by mass of 32〇5 component and/or 0~55.0% by mass of ^205 component and/or 0~18.0% by mass of butyl quinone 2 component and/or I56904.doc -27- 201206856 0~40.0% by mass a Bi203 component and/or a W03 component of 0 to 25.0 mass%/〇 and/or a Li20 component of 0 to 12.0% by mass and/or a Na20 component of 0 to 20.0% by mass and/or a K20 component of 0 to 20.0% by mass and/or / or 0 ~ 20.0% by mass of iCs20 components and / or 0 ~ 5.0 mass. MgO component and/or 0-10.0% by mass of CaO component and/or 0 to 20.0% by mass of SrO component and/or 0 to 45.0% by mass of BaO component and/or 0 to 25.0% by mass of ZnO component and/or / or 0 to 30.0% by mass of the P205 component and / or 0 to 25.0% by mass of the B2 〇 3 component and / or 0 to 20.0 mass ° /. a Ge02 component and/or a Y203 component of 0 to 40.0% by mass and/or a La203 component of 0 to 40.0% by mass and/or a Gd203 component of 0 to 40.0% by mass and/or a Yb203 component of 0 to 30.0% by mass and/or Or 0 to 20.0% by mass of the Lu203 component and/or 0 to 45.0% by mass of the Te02 component and/or 0 to 20.0% by mass. Al2〇3 component and/or 0-25.0% by mass 2Ga203 component and/or 0~30.0% by mass of Ιη203 component and/or 0~25.0% by mass of Zr02 component and/or 156904.doc -28 · 201206856 〇~3.0 The mass %iSb2〇3 component and/or 〇~3.0% by mass iCe〇2 component. [Manufacturing Method] The optical glass of the present invention is produced, for example, in the following manner. That is, the raw materials are mixed in such a manner that the respective components are within a specific content range, and the produced mixture is placed in a tumbling, quartz-hanging net, or a oxidized metal, and partially melted, and then added to the metal ruthenium and platinum.坩埚, (4) In the temperature range of ―, the second = melting, mixing to homogenize and defoaming, etc., to the deletion. After the temperature of c, finishing and stirring were carried out to remove streaks, and casting was carried out on a mold to be slowly cooled, whereby the optical glass of the present invention was produced. <Physical Properties> The optical glass of the present invention preferably has a specific refractive index and dispersion (Abbe number). The refractive index (nd) of the optical glass of the present invention is preferably 1.77 as a lower limit, more preferably i 79 as a lower ridge, and most preferably a lower limit. On the other hand, the upper limit of the refractive index (nd) of the optical glass of the present invention is not particularly limited, but in most cases it is approximately 2.2 G or less, more specifically 2·1 Å or less, and more specifically 2 Å or less. & The Abbe's number (vd) of the optical glass of the present invention is preferably an upper limit of 3 Torr, more preferably an upper limit of 29, and most preferably an upper limit of 27. In another aspect, the Abbe number of the optical glass of the present invention

The lower limit of Od) is not particularly limited, but in most cases, it is approximately 1 Torr or more, and more specifically, mx is more specifically 15 or more. As a result, the degree of freedom in optical design is increased, and even if the thickness of the element is reduced, a large amount of light can be obtained. 156904.doc -29- 201206856 Further, the optical glass of the present invention has a lower partial dispersion ratio (3), F). More specifically, the partial dispersion ratio (eg and the Abbe number (vd) of the optical glass of the present invention satisfies (_〇vd+0.63460)$(eg,F)$(_0. 00563xVd + 〇75573), X satisfies (_0.0025〇XVd+〇6571〇) each in the range of vd>25 (^, (-0.0034〇xvd+0.70000). An optical glass having a ratio (eg'f) close to a regular line and having a low partial dispersion ratio (0g, F), so that the optical element formed of the optical glass can be used for pre-breaking, which is reduced. Here, vdg25 The partial dispersion ratio of the optical glass (eg, the limit of 〇 is preferably (-0, 00160xVd + 0.63460), more preferably 0.63660 under the 〇〇〇 16^), and the best is (-0 00160xVd + 0 6386 〇). In addition, the partial dispersion ratio (q ρ) of the optical glass at the time of Vd+ vdS 25 is preferably (-0.00563乂乂£1 + 〇.75573), more preferably (-0.〇〇563><々+〇75473),: Jia Wei (-0.00563><%+0.75373). Moreover, the lower limit of the optical rupture ratio (eg, f) of (1>25 is preferably (_0.0025〇XVd+〇657i〇) 〇p is preferably (-0.0025〇xVd+0.65910), The optimum is (, 〇〇〇25〇xVd+〇%(4)). On the other hand, the upper limit of the partial dispersion ratio (θ§, f) of the optical glass at vd>25 is preferably (-0.00340xVd+0.70000). More preferably (_〇〇〇34〇xVd+ 0.69900), the best is (·0.〇〇34〇χν£ΐ+〇698〇〇). In addition, especially in areas with small Abbe number (vd) Partial dispersion ratio of (9), F) is the value of the normal line. The relationship between the partial dispersion ratio (θ§, F) and the Abbe number (vd) of the usual glass is shown by a curve. However, since it is more difficult to approximate the curve, in the present invention, a line having a different slope is used as a boundary with Vd=25 to indicate that the partial dispersion ratio (eg, F) is lower than that of the usual glass. 156904.doc -30- 201206856 Further, the optical glass of the present invention is preferably less colored. In particular, the optical glass of the present invention is expressed by the transmittance of glass, and in the sample having a thickness of 10 mm, the wavelength of the light transmittance of 70% (human 7 ()) is 46 () nm or less, more preferably 440 nm or less, preferably 420 nm or less. Further, the optical glass of the present invention, when expressed by the transmittance of glass, represents 80 in a sample having a thickness of 1 mm. /. The wavelength of the light transmittance (18()) is 56 () or less, more preferably 540 nm or less, and most preferably 520 nm or less. Further, the optical glass of the present invention has a wavelength (λ;) indicating a 5% light transmittance in a sample having a thickness of 10 mm of 420 nm or less, more preferably 4 Å or less, and most preferably 380 nm or less. . Thereby, the transparency of the glass in the visible light region is improved by the absorption end of the glass in the vicinity of the ultraviolet region. Therefore, the optical glass can be preferably used as a material of an optical element such as a lens. Further, the optical glass of the present invention preferably has good press formability. That is, it is preferred that the optical glass of the present invention does not cause devitrification and opalescence even before and after the reheat test (^). Therefore, even if it is assumed that the reheating test of the reheating press process is difficult to cause devitrification and coloring, it becomes difficult to lose the light transmittance of the glass, so that the glass can be easily re-applied. Hot press processing is representative of reheat treatment. Namely, since an optical element having a complicated shape can be produced by press molding, it is possible to manufacture an optical element which is low in manufacturing cost and excellent in productivity. Here, the 'reheat test (4) can be carried out by loading a test piece of 15 mm x 15 mm x 30 mm on a concave refractory and placing it in an electric furnace for reheating. It takes 150 minutes to warm from normal temperature to transfer to each sample. Temperature (Tg) 咼 80C~150C (the temperature falling on the refractory), after holding at the temperature 156904.doc •31 · 201206856 for 30 minutes, cool to room temperature and take it out of the furnace, it will be After the internal observation, the two faces were ground to a thickness (7), and the ground glass sample was visually observed. Furthermore, the presence or absence of devitrification and opalescence before and after the reheat test (4) can be visually confirmed, for example, "no devitrification and opalescence" means, for example, a light having a wavelength of 587.56 nm after the reheat test) The transmittance of (d line) divided by the transmittance of the d line of the test piece before the reheat test is approximately 0·80 or more. [Preform and optical element] A glass molded body can be produced by using, for example, reheat press molding or precision press forming #molding molding using the produced optical glass. In other words, a preform for press molding is formed by using an optical glass, and the preform is subjected to reheat molding, followed by polishing to prepare a glass molded body, or precision-prepared a preform produced by, for example, polishing. The glass molded body was produced by press molding. Further, the method of producing the glass molded body is not limited to these methods. The glass molded body produced in this manner is useful for various optical elements, and particularly preferably used for optical elements such as lenses or iridium. Thereby, the blurring of the color caused by the chromatic aberration of the transmitted light of the optical system provided with the optical element is lowered. Therefore, when the optical element is used in the case of a camera, the object can be more accurately expressed, and the desired image can be projected at a higher resolution when the optical element is used in a projector. [Examples] The composition of the present invention (Ν〇1 to Ν〇119) and the comparative example (Νο. Bu 〇2) 156904.doc -32-201206856, and the refractive index (nd), Abbe The number (Vd), the partial dispersion ratio (0g, F), the result of the reheat test', and the wavelength indicating the spectral transmittance of 5% and 80 / 0 (Μ, λ7〇, λ^ο) are shown in Table 1. ~ Table 16. Further, the following examples are for illustrative purposes only and are not limited to the examples. The glass of the examples (No. 1 to No. 119) and the comparative examples (No. 1 to Νο. 2) of the present invention were produced by the following methods: each selected oxide, hydroxide, carbonate, and the like High-purity raw materials used in ordinary optical glass such as nitrates, fluorides, hydroxides, and partial acid compounds are used as raw materials of the respective components', and are shown in Tables 1 to 16 as Examples and Comparative Examples. The proportion of the composition is weighed and uniformly mixed, and then put into a platinum crucible, melted in the temperature range of UOO^MOO^ in an electric furnace according to the melting difficulty of the glass composition for 3 to 5 hours, stirred and homogenized and defoamed. After that, the temperature was lowered to 1000 to 1300 ° C and stirred and homogenized, and then poured onto a mold to be slowly cooled. Here, the refractive index (nd), Abbe number (Vd) and part of the glass of the examples (1^〇_1~1^〇.119) and the comparative example (]^〇.1~^〇.2) The dispersion ratio (eg, F) was measured in accordance with the Japanese Optical Glass Industry Association specification JOGIS01-2003. Then, based on the obtained Abbe number (heart) and partial dispersion ratio (0g, F), the slope a in the relational expression (eg, F) = -axvd + b is determined to be 0.00160, 0.00250, 〇·〇 Intercept b at 〇340 and 0.00563. Further, the glass used in the measurement was treated by a slow cooling furnace using a slow cooling rate of -25 ° C / hr. Further, the transmittance of the glass of the examples (No. 1 to > 〇. 119) and the comparative example (>1 〇.1~>1 〇.2) was measured in accordance with the Japanese Optical Glass Industry Association specification JOGIS02. 156904.doc •33- 201206856 In addition, in the month of this issue, the transmittance of glass is determined by measuring the transmittance of glass. Specifically, according to JIS Z8722, the optical transmittance of 2 〇〇 to 8 〇〇 nm is measured for the oppositely parallel polished product having a thickness of 10 ± 0.1, and λ 5 (wavelength at a transmittance of 5%) is obtained, and (transmission is obtained). The ratio is the wavelength at 7〇%) and hG (the wavelength at which the transmittance is 8〇%). Further, the glass of the examples (Nol No. uy and the comparative examples (N〇1 to N〇.2) was visually confirmed for the devitrification and the whiteness before and after the reheat test. Here, the devitrification before and after the reheat test and The confirmation of the milky white was carried out by placing a test piece of 15 mm×l5 mm×30 mm on a concave refractory and placing it in an electric furnace for reheating until the reheating temperature, holding at this temperature for 3 minutes, cooling to normal temperature and taking out Outside the furnace, the surface of the polished glass can be visually observed for the devitrification and the presence or absence of milkiness by grinding the two surfaces of the surface to a thickness of 1 〇 claw in a manner of internal observation. At this time, the reheating temperature will be Set to (Tg+8〇 <)c~ 150C) does not produce devitrification and opalescence, and when the reheating temperature is set to a temperature higher than (Tg+8〇C~150C), no devitrification and opalescence of the glass system will occur. The result of the thermal test is set to "〇". Further, when the reheating temperature is set to a specific temperature within the range of (Tg + 80 ° C to 150 ° C), devitrification and opalescence are not generated, but the reheating temperature is set at (Tg + 80 ° C - 150 ° The glass that is devitrified or opalescent at a higher temperature within the range of 〇 is set to "Δ" 〇 156904. Doc -34- 201206856 [Table i] Example 1 2 3 4 5 6 7 8 Si02 40. 796 37. 796 40. 796 40. 796 40. 796 40. 796 40. 796 37. 796 Ta2〇5 3. 000 3. 000 3. 000 3. 000 6. 000 6. 000 6. 000 3. 000 Nb2〇5 16. 341 16. 341 16. 341 16. 341 16. 341 13. 341 16. 341 16. 341 Ti02 6. 962 6. 962 3. 962 6. 962 3. 962 6. 962 6. 962 6. 962 W03 Li20 12. 129 12. 129 12. 129 12. 129 12. 129 12. 129 9. 129 12. 129 Na20 13. 659 16. 659 16. 659 13. 659 13. 659 13. 659 13. 659 13. 659 K20 MgO CaO SrO BaO ZnO 1. 726 1. 726 1. 726 1. 726 1. 726 1. 726 1. 726 4. 726 P2O5 B2〇3 Ge〇2 AI2O3 Zr02 5. 381 5. 381 5. 381 5. 381 5. 381 5. 381 5. 381 卜 5. 381 Sb2〇3 0. 006 0. 006 0. 006 0. 006 0. 006 0. 006 0. 006 P). 006 Total 100. 00 100. 00 100. 00 100. 00 100. 00 100. 00 100. 00 100. 00 Nb2〇5+Ta2〇5+Na20+BaO 33. 000 36. 000 36. 000 33. 000 36. 000 33. 000 36. 000 33. 000 (Nb2〇5+Ta2〇5)/ (TiO?+Bi2O^WO^ 2. 778 2. 778 4. 881 2. 778 5. 638 2. 778 3. 209 2. 778 (Nb2〇5+Ta2〇5+Na20+BaO)/ (Ti02+Bi203+W03) 4. 740 5. 171 9. 086 4. 740 9. 086 4. 740 5. 171 4. 740 Ta2〇5/(Nb2〇5+Ta2〇5) 0. 155 0. 155 0. 155 0. 155 0. 269 0. 310 0. 269 0. 155 Li2〇+Na2〇+K2〇+Cs2〇 25. 788 28. 788 28. 788 25. 788 25. 788 25. 788 22. 788 25. 788 Ta205/(Li20+Na20) 0. 116 0. 104 0. 104 0. 116 0. 233 0. 233 0. 263 0. 116 MgO+CaO+SrO+BaO+ZnO 1. 726 1. 726 1. 726 1. 726 1. 726 1. 726 1. 726 4. 726 Si〇2+P2〇5+B2〇3+Ge〇2 40. 796 37. 796 40. 796 40. 796 40. 796 40. 796 40. 796 37. 796 丫2〇3+[32〇3+(5廿2〇3 +Yb2〇3+Lll2〇3 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 1. 8740 1. 8718 1. 8510 1. 8741 1. 8824 1. 8710 1. 8997 1. 8843 Vd 24. 5 24. 7 25. 7 24. 5 24. 7 25. 0 23. 7 24. 5 eg,f 0. 61208 0. 60992 0*60585 0. 61191 0. 60930 0. 60868 0. 61453 0. 61163 Intercept b a=0. 00160 0. 65128 0. 64944 0. 64697 0. 65111 0. 64882 0. 64868 0. 65245 0. 65083 a=0. 00250 0. 67333 0. 67167 0. 67010 0. 67316 0. 67105 0. 67118 0. 67378 0. 67288 a=0. 00340 0. 69538 0. 69390 0. 69323 0. 69521 0. 69328 0. 69368 0. 69511 0. 69493 a=0. 00563 0. 75001 0. 74898 0. 75054 0. 74984 0. 74837 0. 74943 0. 74796 0. 74957 into 80 473. 5 476. 5 447. 5 465 461 472 511 491 ^70 407 410 396. 5 405. 5 400 403. 5 412. 5 417 358. 5 356. 5 351. 5 358. 5 355 356. 5 361. 5 358. 5 35· 156904. Doc 201206856 [Table 2] Example 9 10 11 12 13 14 15 16 Si02 40. 796 40. 796 40. 796 40. 796 40. 796 40. 796 40. 796 37. 796 Τ&2〇5 3. 000 3. 000 6. 000 6. 000 6. 000 4. 726 3. 000 3. 000 Nb2〇5 16. 341 16. 341 16. 341 13. 341 16. 341 16. 341 16. 341 16. 341 Ti02 6. 962 3. 962 0. 962 3. 962 3. 962 3. 962 0. 962 3. 962 W03 Li20 9. 129 12. 129 12. 129 12. 129 9. 129 12. 129 12. 129 12. 129 Na20 16. 659 16. 659 16. 659 16. 659 16. 659 16. 659 16. 659 16. 659 K20 MgO CaO SrO BaO ZnO 1. 726 1. 726 1. 726 1. 726 1. 726 4. 726 4. 726 p2〇5 B2O3 Ge〇2 AI2O3 Zr02 5. 381 5. 381 5. 381 5. 381 5. 381 5. 381 5. 381 5. 381 Sb2〇3 0. 006 0. 006 0. 006 0. 006 0. 006 0. 006 0. 006 0. 006 Total 100. 00 100. 00 100. 00 100. 00 100. 00 100. 00 100. 00 100. 00 Nb2〇5+Ta2〇5+Na2〇+BaO 36. 000 36. 000 39. 000 36. 000 39. 000 37. 726 36. 000 36. 000 (Nb205+Ta205)/ (Ti02+Bi203+W03) 2. 778 4. 881 23. 218 4. 881 5. 638 5. 317 20. 100 4. 881 (Nb2〇5+Ta2〇5+Na2〇+BaO)/ (Ti02+Bi203+W03) 5. 171 9. 086 40. 532 9. 086 9. 843 9. 521 37. 414 9. 086 Ta2〇5/(Nb2〇5+Ta2〇5) 0. 155 0. 155 0. 269 0. 310 0. 269 0. 224 0. 155 0. 155 Li2〇+Na2〇+K2〇+Cs2〇 25. 788 28. 788 28. 788 28. 788 25. 788 28. 788 28. 788 28. 788 Ta2〇5/(Li20+Na20) 0. 116 0. 104 0. 208 0. 208 0. 233 0. 164 0. 104 0. 104 MgO+CaO+SrO+BaO+ZnO 1. 726 1. 726 1. 726 1. 726 1. 726 0. 000 4. 726 4. 726 Si〇2+P2〇5+B2〇3+Ge〇2 40. 796 40. 796 40. 796 40. 796 40. 796 40. 796 40. 796 37. 796 Y2〇3+La2〇3+Gd2〇3 +Yb2〇3+Lll2〇3 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 nd 1. 8675 1. 8508 1. 8615 1. 8472 1. 8774 1. 8641 1. 8390 1. 8597 Vd 24. 5 25. 7 25. 8 26. 3 24. 7 25. 2 26. 6 25. 6 eg - f 0. 61160 0. 60628 0. 60496 0. 60403 0. 60967 0. 60845 0. 60178 0. 60704 intercept b a=0. 00160 0. 65080 0. 64740 0. 64624 0. 64611 0. 64919 0. 64877 0. 64434 0. 64800 a=0. 00250 0. 67285 0. 67053 0. 66946 0. 66978 0. 67142 0. 67145 0. 66828 0. 67104 a=0. 00340 0. 69490 0. 69366 0. 69268 0. 69345 0. 69365 0. 69413 0. 69222 0. 69408 a=0. 00563 0. 74953 0. 75097 0. 75022 0. 75210 0. 74873 0. 75033 0. 75154 0. 75116 λβ〇 466 464 448 477. 5 467 450. 5 438 464. 5 people 70 406. 5 402. 5 390 393. 5 401 395 390. 5 402. 5 λ5 358 352 346 350 355 352. 5 344 351 36- 156904. Doc 201206856 [Table 3] Example 17 18 19 20 21 22 23 24 Si02 40. 796 43. 796 40. 796 40. 796 40. 796 40. 796 37. 796 40. 796 Ta^Os 3. 000 3. 000 6. 000 9. 000 9. 000 9. 000 9. 000 7. 726 Nb2〇5 16. 341 16. 341 16. 341 16. 341 13. 341 16. 341 16. 341 16. 341 Ti02 3. 962 3. 962 3. 962 0. 962 3. 962 3. 962 3. 962 3. 962 W03 Li20 9. 129 9. 129 12. 129 12. 129 12. 129 9. 129 12. 129 12. 129 Na20 16. 659 16. 659 13. 659 13. 659 13. 659 13. 659 13. 659 13. 659 K20 MfiO CaO SrO BaO ZnO 4. 726 1. 726 1. 726 1. 726 1. 726 1. 726 1. 726 P2〇5 B203 Ge〇2 AI2O3 Zr02 5. 381 5. 381 5. 381 5. 381 5. 381 5. 381 5. 381 5. 381 Sb203 0. 006 0. 006 0. 006 0. 006 0. 006 0. 006 0. 006 0. 006 Total 100. 00 100. 00 100. 00 100. 00 100. 00 100. 00 100. 00 100. 00 Nb2〇5+Ta2〇5+Na2〇+BaO 36. 000 36. 000 36. 000 39. 000 36. 000 39. 000 39. 000 37. 726 (Nb2〇5+Ta205)/ (Ti02+Bi203+W0^ 4. 881 4. 881 5. 638 26. 336 5. 638 6. 396 6. 396 6. 074 (Nb2〇5+Ta2〇5+Na20+BaO)/ (Ti02+Bi2〇3+W03) 9. 086 9. 086 9. 086 40. 532 9. 086 9. 843 9. 843 9. 521 Ta2〇5/(Nb2〇5+Ta2〇5) 0. 155 0. 155 0. 269 0. 355 0. 403 0. 355 0. 355 0. 321 Li2〇+Na2〇+K2〇+Cs2〇 25. 788 25. 788 25. 788 25. 788 25. 788 22. 788 25. 788 25. 788 Ta205/(Li20+Na20) 0. 116 0. 116 0. 233 0. 349 0. 349 0. 395 0. 349 0. 300 MgO+CaO+SrO+BaO+ZnO 4. 726 1. 726 1. 726 1. 726 1. 726 1. 726 1. 726 0. 000 Si〇2+P2〇5+B2〇3+Ge〇2 40. 796 43. 796 40. 796 40. 796 40. 796 40. 796 37. 796 40. 796 Y 2〇3+La2〇3+Gd2〇3 +Yb2〇3+Lu2〇3 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 na 1. 8563 1. 8466 1. 8845 1. 8939 1. 8818 1. 9083 1. 9145 1. 8964 Vd 25. 4 25. 5 24. 7 24. 8 25. 2 23. 9 24. 0 24. 3 eg ’ f 0. 60892 0. 60898 0. 60987 0. 60783 0. 60623 0. 61130 0. 61043 0. 60964 intercept b a=0. 00160 0. 64956 0. 64978 0. 64939 0. 64751 0. 64655 0. 64954 0. 64883 0. 64852 a=0. 00250 0. 67242 0. 67273 0. 67162 0. 66983 0. 66923 0. 67105 0. 67043 0. 67039 a=0. 00340 0. 69528 0. 69568 0. 69385 0. 69215 0. 69191 0. 69256 0. 69203 0. 69226 a=0. 00563 0. 75192 0. 75255 0. 74893 0. 74745 0. 74810 0. 74586 0. 74555 0. 74645 λβ〇 454. 5 447. 5 489 481. 5 508. 5 481 503 480 into 70 399 396. 5 410 399. 5 413 401 415. 5 405. 5 λ5 353 353. 5 355. 5 350 358. 5 353. 5 356. 5 356 37- I56904. Doc 201206856 [Table 4] Example 25 26 27 28 29 30 31 Si02 40. 796 37. 796 40. 796 43. 796 40. 796 40. 796 40. 796 Χ&2〇5 6. 000 6. 000 6. 000 6. 000 9. 000 11. 000 11. 000 Nb2〇s 16. 341 16. 341 16. 341 16. 341 13. 341 13. 341 13. 341 Ti02 0. 962 3. 962 3. 962 3. 962 3. 962 1. 962 3. 962 W03 Li20 12. 129 12. 129 9. 129 9. 129 12. 129 12. 129 10. 129 Na20 13. 659 13. 659 13. 659 13. 659 13. 659 13. 659 13. 659 K20 MgO CaO SrO BaO ZnO 4. 726 4. 726 4. 726 1. 726 1. 726 1. 726 1. 726 p2〇5 B2O3 Ge〇2 A】2〇3 Zr02 5. 381 5. 381 5. 381 5. 381 5. 381 5. 381 5. 381 Sb203 0. 006 0. 006 0. 006 0. 006 0. 006 0. 006 0. 006 Total 100. 00 100. 00 100. 00 100. 00 100. 00 100. 00 100. 00 Nb2〇5+Ta2〇5+Na2〇+BaO 36. 000 36. 000 36. 000 36. 000 36. 000 38. 000 38 Lion (Nb〗 〇5+Τ&2 O5)/ (Ti02+Bi203+W03) 23. 218 5. 638 5. 638 5. 638 5. 638 12. 405 6. 143 (Nb2〇5+Ta2〇5+Na2〇+BaO)/ (Ti02+Bi203+W03) 37. 414 9. 086 9. 086 9. 086 9. 086 19. 366 9. 591 Ta2〇5/(Nb2〇5+Ta2〇5) 0. 269 0. 269 0. 269 0. 269 0. 403 0. 452 0. 452 Li2〇+Na2〇+K2〇+Cs2〇 25. 788 25. 788 22. 788 22. 788 25. 788 25. 788 23. 788 Ta2〇5/(Li20+Na20) 0. 233 0. 233 0. 263 0. 263 0. 349 0. 427 0. 462 MgO+CaO+SrO+BaO+ZnO 4. 726 4. 726 4. 726 1. 726 1. 726 1. 726 1. 726 Si〇2+F*2〇5+B2〇3+Ge〇2 40. 796 37. 796 40. 796 43. 796 40. 796 40. 796 40. 796 Y 2〇3+La2〇3+Gd2〇3 +Yb2〇3+Lu2〇3 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 nd 1. 8742 1. 8951 1. 8912 1. 8796 1. 8819 1. 8870 1. 8967 vd 25. 5 24. 6 24. 4 24. 5 25. 2 25. 3 24. 7 0g, F 0. 60689 0. 60957 0. 61135 0. 61110 0. 60610 0. 60536 0. 60792 intercept b a=0. 00160 0. 64769 0. 64893 0. 65039 0. 65030 0. 64642 0. 64584 0. 64744 a=0. 00250 0. 67064 0. 67107 0. 67235 0. 67235 0. 66910 0. 66861 0. 66967 a=0. 00340 0. 69359 0. 69321 0. 69431 0. 69440 0. 69178 0. 69138 0. 69190 a=0. 00563 0. 75046 0. 74807 0. 74873 0. 74903 0. 74798 0. 74780 0. 74698 464 486. 5 486 482. 5 461. 5 465 474. 5 ^70 399 408 406. 5 405 397. 5 394. 5 401 λ5 348 354. 5 356. 5 357. 5 353 349 355 38- 156904. Doc 201206856 [Table 5] Example 32 33 34 35 36 37 38 39 SiO, 38. 796 40. 796 40. 796 43. 796 40. 796 42. 522 40. 796 42. 796 Ta, 2〇5 11. 000 10. 726 6. 000 6. 000 6. 000 6. 000 11. 000 11. 000 Nb2〇5 13. 341 13. 341 16. 341 16. 341 16. 341 16. 341 13. 341 13. 341 Ti02 3. 962 3. 962 0. 962 0. 962 0. 962 0. 962 1. 962 1. 962 W03 Li20 12. 129 12. 129 12. 129 9. 129 9. 129 12. 129 12. 129 10. 129 Na20 13. 659 13. 659 16. 659 16. 659 16. 659 16. 659 13. 659 13. 659 K20 MgO CaO SrO BaO ZnO 1. 726 1. 726 1. 726 4. 726 1. 726 1. 726 P2〇S B2〇3 Ge02 Al2〇3 ZrO, 5. 381 5. 381 5. 381 5. 381 5. 381 5. 381 5. 381 5. 381 Sb203 0. 006 0. 006 0. 006 0. 006 0. 006 0. 006 0. 006 0. 006 Total 100. 00 100. 00 100. 00 100. 00 100. 00 100. 00 100. 00 100. 00 Nb2〇5+Ta2〇5+Na2〇+BaO 38. 000 37. 726 39. 000 39. 000 ^ 39. 000 39. 000 38. 000 38. 000 (Nb2〇5+Ta2〇5)/ (Ti02+Bi203+W03) 6. 143 6. 074 23. 218 23. 218 23. 218 23. 218 12. 405 12. 405 (Nb2〇5+Ta2〇5+Na20+BaO)/ (Ti02+Bi20,+W03) 9. 591 9. 521 40. 532 40. 532 40. 532 40. 532 19. 366 19. 366 Ta2〇5, (Nb2〇5+Ta2〇5) 0. 452 0. 446 0. 269 0. 269 0. 269 0. 269 0. 452 0. 452 Li2〇+Na2〇+K2〇+Cs2〇 25. 788 25. 788 28. 788 25. 788 25. 788 28. 788 25. 788 23. 788 Ta2〇5/(Li20+Na20) 0. 427 0. 416 0. 208 0. 233 0. 233 0. 208 0. 427 0. 462 MgO+CaO+SrO+BaO+ZnO 1. 726 0. 000 1. 726 1. 726 4. 726 0. 000 1. 726 1. 726 Si〇2+P2〇5+B2〇3+Ge〇2 38. 796 40. 796 40. 796 43. 796 40. 796 42. 522 40. 796 42. 796 V2〇3+La2〇3+Gd2〇3 +Yb2〇3+Lll2〇3 0. 000 0. 000 0. 000 0. 000 0'000 0. 000 0. 000 0. 000 nd 1. 9014 1. 8912 1. 8630 1. 8583 1. 8673 1. 8572 1. 8876 1. 8827 Vd 24. 7 24. 8 25. 7 25. 6 25. 5 25. 8 25. 3 25. 3 0g ’ F 0. 60821 0. 60825 0. 61050 0. 60649 0. 60588 0. 60697 0. 60535 0. 60515 cutting distance b a=0. 00160 0. 64773 0. 64793 0. 65162 0. 64745 0. 64668 0. 64825 0. 64583 0. 64563 a=0. 00250 0. 66996 0. 67025 0. 67475 0. 67049 0. 66963 0. 67147 0. 66860 0. 66840 a=0. 00340 0. 69219 0. 69257 0. 69788 0. 69353 0. 69258 0. 69469 0. 69137 0. 69117 a=0. 00563 0. 74727 0. 74787 0. 75519 0. 75062 0. 74945 0. 75223 0. 74779 0. 74759 ^80 485 475 453 449. 5 463 453. 5 475 468. 5 ^70 403 401 394. 5 393. 5 397. 5 398 398 396 354 354 346 348 347. 5 347 349. 5 350. 5 39- 156904. Doc 201206856 [Table 6] Example 40 41 42 43 44 45 46 SiO, 42. 796 42. 522 42. 796 42. 796 40. 796 43. 796 40. 796 T&2〇5 11. 000 11. 000 11. 000 11. 000 6. 000 6. 000 6. 000 Nb2〇5 13. 341 13. 341 13. 341 11. 341 16. 341 16. 341 16. 341 Ti02 1. 962 1. 962 1. 962 1. 962 0. 962 0. 962 0. 962 WO, Li20 12. 129 12. 129 12. 129 12. 129 12. 129 9. 129 13. 855 Na20 11. 659 13. 659 13. 659 13. 659 16. 659 16. 659 16. 659 k2o ΜβΟ CaO SrO BaO ZnO 1. 726 1. 726 1. 726 1. 726 1. 726 p2〇5 B2O3 Ge〇2 AI2O3 Zr02 5. 381 5. 381 3. 381 5. 381 5. 381 5. 381 5. 381 Sb2〇3 0. 006 0. 006 0. 006 0. 006 0. 006 0. 006 0. 006 Total 100. 00 100. 00 100. 00 100. 00 100. 00 100. 00 100. 00 Nb2〇5+Ta2〇5+Na2〇+BaO 36. 000 38. 000 38. 000 36. 000 39. 000 39. 000 39. 000 (Nb2〇5+Ta2〇5)/ (Ti02+Bi20,+W03) 12. 405 12. 405 12. 405 11. 385 23. 218 23. 218 23. 218 (Nb2〇5+Ta2〇5+Na2〇+BaO)/ (Ti02+Bi203+W03) 18. 347 19. 366 19. 366 18. 347 40. 532 40. 532 40. 532 Ta2〇s/(Nb2〇5+Ta2〇5) 0. 452 0. 452 0. 452 0. 492 0. 269 0. 269 0. 269 Li2〇+Na2〇+K2〇+Cs2〇 23. 788 25. 788 25. 788 25. 788 28. 788 25. 788 30. 514 Ta205/(Li20+Na20) 0. 462 0. 427 0. 427 0. 427 0. 208 0. 233 0. 197 MgO+CaO+SrO+BaO+ZnO 1. 726 0. 000 1. 726 1. 726 1. 726 1. 726 0. 000 Si〇2+P2〇5+B2〇3+Ge〇2 42. 796 42. 522 42. 796 42. 796 40. 796 43. 796 40. 796 Y 2〇3+La2〇3+Gd2〇3 +Yb2〇3+Lu2〇3 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 nd 1. 8879 1. 8798 1. 8787 1. 8647 1. 8627 1. 8574 1. 8597 vd 25. 2 25. 4 25. 3 26. 3 25. 7 25. 6 25. 8 0g ’ F 0. 60614 0. 60456 0. 60651 0. 60383 0. 60609 0. 60561 0. 60337 intercept b a=0. 00160 0. 64646 0. 64520 0. 64699 0. 64591 0. 64721 0. 64657 0. 64465 a=0. 00250 0. 66914 0. 66806 0. 66976 0. 66958 0. 67034 0. 66961 0. 66787 a=0. 00340 0. 69182 0. 69092 0. 69253 0. 69325 0. 69347 0. 69265 0. 69109 a=0. 00563 0. 74801 0. 74756 0. 74894 0. 75189 0. 75078 0. 74974 0. 74862 ^80 474 462 462. 5 454 450 448. 5 468. 5 ^7〇 397 393. 5 395. 5 389. 5 396. 5 393. 5 408 into 5 351 349. 5 349. 5 347 346. 5 348 346. 5 40- 156904. Doc 201206856 [Table 7] Example 47 48 49 50 51 52 53 54 Si02 42. 522 37. 796 40. 796 40. 796 40. 796 42. 522 44. 522 42. 522 T&2〇5 6. 000 6. 000 11. 000 11. 000 11. 000 11. 000 11. 000 11. 000 Nb2〇5 16. 341 16. 341 13. 341 10. 341 10. 341 13. 341 13. 341 13. 341 Ti02 0. 962 0. 962 1. 962 4. 962 1. 962 1. 962 1. 962 1. 962 W03 3. 000 Li20 12. 129 15. 129 12. 129 12. 129 12. 129 12. 129 12. 129 14. 129 Na20 16. 659 16. 659 13. 659 13. 659 13. 659 13. 659 11. 659 11. 659 K20 MgO CaO SrO BaO ZnO 1. 726 1. 726 1. 726 1. 726 p205 B203 Ge〇2 ai2o3 Zr02 5. 381 5. 381 5. 381 5. 381 5. 381 5. 381 5. 381 5. 381 Sb2〇3 0. 006 0. 006 0. 006 0. 006 0. 006 0. 006 0. 006 0. 006 Total 100•(8) 100. 00 100. 00 100. 00 100. 00 100. 00 100. 00 100. 00 Nb2〇5+Ta2〇5+Na20+BaO 39. 000 39. 000 38. 000 35. 000 35. 000 38. 000 36. 000 36. 000 (Nb2〇5+Ta2〇5)/ (Ti02+Bi203+W0,) 23. 218 23. 218 12. 405 4. 301 4. 301 12. 405 12. 405 12. 405 (Nb2〇5+Ta2〇5+Na20+BaO)/ (Ti02+Bi2〇3+WO,) 40. 532 40. 532 19. 366 7. 053 7. 053 19. 366 18. 347 18. 347 Ta2〇5/(Nb2〇5+Ta2〇5) 0. 269 0. 269 0. 452 0. 515 0. 515 0. 452 0. 452 0. 452 Li2〇+Na2〇+K2〇+Cs2〇 28. 788 31. 788 25. 788 25. 788 25. 788 25. 788 23. 788 25. 788 Ta205/(Li20+Na20) 0. 208 0. 189 0. 427 0. 427 0. 427 0. 427 0. 462 0. 427 MgO+CaO+SrO+BaO+ZnO 0. 000 1. 726 1. 726 1. 726 1. 726 0. 000 0. 000 0. 000 Si〇2+P2〇5+B2〇3+Ge〇2 42. 522 37. 796 40. 796 40. 796 40. 796 42. 522 44. 522 42. 522 Y 2〇3+La2〇3+Gd2〇3 +Yb2〇3+LU2〇3 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 nd 1. 8570 1. 8670 1. 8863 1. 8748 1. 8838 1. 8795 1. 8815 1. 8868 vd 25. 8 26. 1 25. 3 25. 7 25. 4 25. 4 25. 3 25. 3 0g ’ F 0. 60602 0. 60970 0. 60543 0. 60517 0. 60426 0. 60595 0. 60637 0. 60559 load distance b a=0. 00160 0. 64730 0. 65146 0. 64591 0. 64629 0. 64490 0. 64659 0. 64685 0. 64607 a=0. 00250 0. 67052 0. 67495 0. 66868 0,66942 0. 66776 0. 66945 0. 66962 0. 66884 a=0. 00340 0. 69374 0. 69844 0. 69145 0. 69255 0. 69062 0. 69231 0. 69239 0. 69161 a=0. 00563 0. 75127 0. 75665 0. 74787 0. 74986 0. 74726 0. 74895 0. 74881 0. 74803 443 492 474 461. 5 459. 5 458. 5 457. 5 450. 5 into 70 392 409. 5 396 395 394 395. 5 396. 5 396 into 5 346. 5 345. 5 349. 5 352 353. 5 349. 5 351 350 -41 - 156904. Doc 201206856 [Table 8] Example 55 56 57 58 59 60 61 62 Si02 42. 522 42. 522 42. 522 42. 522 40. 522 42. 522 42. 522 44. 522 TS2〇5 11. 000 11. 000 6. 000 6. 000 6. 000 6. 000 11. 000 11. 000 Nb205 13. 341 13. 341 16. 341 16. 341 16. 341 16. 341 13. 341 13. 341 Ti02 1. 962 1. 962 0. 962 0. 962 0. 962 0. 962 1. 962 1. 962 W03 2. 000 Li20 12. 129 12. 129 12. 129 10. 129 12. 129 12. 129 12. 129 12. 129 Na20 11. 659 11. 659 16,659 16. 659 16. 659 14. 659 13. 659 11. 659 K20 MgO CaO SrO BaO 2. 000 2. 000 2. 000 ZnO p205 B2〇3 Ge〇2 A]2〇3 Zr02 7. 381 5. 381 5. 381 5. 381 5. 381 5. 381 5. 381 5. 381 Sb203 0. 006 0. 006 0. 006 0. 006 0. 006 0. 006 0. 006 0. 006 Total 100. 00 100. 00 100. 00 100. 00 100. 00 100. 00 100. 00 100. 00 Nb2〇5+Ta2〇5+Na20+BaO 36. 000 36. 000 39. 000 41. 000 4K000 39. 000 38. 000 36. 000 (Nb205+Ta205)/ (Ti02+Bi203+W03) 12. 405 6. 143 23. 218 23. 218 23. 218 23. 218 12. 405 12. 405 (Nb2〇5+Ta2〇5+Na20+BaO)/ (Ti02+Bi20,+W0,) 18. 347 9. 086 40. 532 42. 610 42. 610 40. 532 19. 366 18. 347 Ta;j〇5/(Nb2〇5+Ta2〇5) 0. 452 0. 452 0. 269 0. 269 0. 269 0. 269 0. 452 0. 452 Li2〇+Na2〇+K2〇+Cs2〇 23. 788 23. 788 28. 788 26. 788 28. 788 26. 788 25. 788 23. 788 Ta205/(Li20+Na20) 0. 462 0. 462 0. 208 0. 224 0. 208 0. 224 0. 427 0. 462 MgO+CaO+SrO+BaO+ZnO 0. 000 0. 000 0. 000 2. 000 2. 000 2. 000 0. 000 0. 000 Si〇2+p2〇5+B2〇3+Ge〇2 42. 522 42. 522 42. 522 42. 522 40. 522 42. 522 42. 522 44. 522 Y2〇3+La2〇3+Gd2〇3 +Yb2〇3+Lu2〇3 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 nd 1. 8906 1. 8904 1. 8567 1. 8592 1. 8626 1. 8643 1. 8808 1. 8809 vd 25. 3 24. 9 25. 8 25. 8 25. 9 25. 8 25. 3 25. 3 0g ’ F 0. 60545 0. 60587 0. 60499 0. 60613 0. 60558 0. 60525 0. 60547 0. 60563 cutting distance b a=0. 00160 0. 64593 0. 64571 0. 64627 0. 64741 0. 64702 0. 64653 0. 64595 0. 64611 a=0. 00250 0. 66870 0. 66812 0. 66949 0. 67063 0. 67033 0. 66975 0. 66872 0. 66888 a=0. 00340 0. 69147 0. 69053 0. 69271 0. 69385 0. 69364 0. 69297 0. 69149 0. 69165 a=0. 00563 0. 74789 0. 74605 0. 75025 0. 75139 0. 75140 0. 75050 0. 74791 0. 74807 455. 5 477 519. 5 472 463. 5 461 467. 5 469 λ?〇 395. 5 407. 5 416. 5 404. 5 401 398. 5 394 394 λ5 351 357 348 347. 5 346 347 349. 5 351 42- 156904. Doc 201206856 [Table 9] Example 63 64 65 66 67 68 69 70 Si02 42. 522 42. 522 42,522 42. 522 42. 522 42. 522 42. 522 44. 522 Ta2〇5 11. 000 11. 000 11. 000 6. 000 6. 000 6. 000 6. 000 6. 000 Nb205 13. 341 13. 341 13. 341 16. 341 16. 341 16. 341 18. 341 16. 341 Ti02 1. 962 1. 962 1. 962 0. 962 0. 962 0. 962 0. 962 0. 962 W03 2. 000 Li2〇 14. 129 12. 129 12. 129 12. 129 12. 129 12. 129 10. 129 10. 129 Na20 11. 659 11. 659 11. 659 14. 659 12. 659 12. 659 14. 659 14. 659 K20 MgO CaO SrO BaO 2. 000 2. 000 4. 000 2. 000 2. 000 2. 000 ZnO p2〇5 B2〇3 Ge〇2 AI20. ·, Zr02 5. 381 5. 381 5. 381 5. 381 5. 381 7. 381 5. 381 5. 381 St>2〇3 0. 006 0. 006 0. 006 0. 006 0. 006 0. 006 0. 006 0. 006 Total 100. 00 100. 00 100. 00 100. 00 100. 00 100. 00 100. 00 100. 00 Nb205+Ta2〇5+Na20+BaO 36. 000 36. 000 38. 000 39. 000 39. 000 37. 000 41. 000 39. 000 (Nb2〇5+Ta2〇5)/ (Ti02+Bi203+W03) 12. 405 6. 143 12. 405 23. 218 23. 218 23. 218 25. 297 23. 218 (Nb2〇5+Ta2〇5+Na20+BaO)/ (Ti02+Bi203+W03) 18. 347 9. 086 19. 366 40. 532 40. 532 38. 453 42. 610 40. 532 Ta2〇5/(^Nb2〇5+Ta2〇5) 0. 452 0. 452 0. 452 0. 269 0. 269 0. 269 0. 247 0. 269 Li2〇+Na2〇+K2〇+Cs2〇 25. 788 23. 788 23. 788 26. 788 24. 788 24. 788 24. 788 24. 788 Ta2〇5/(Li20+Na20) 0. 427 0. 462 0. 462 0. 224 0. 242 0. 242 0. 242 0. 242 MgO+CaO+SrO+BaO+ZnO 0. 000 0. 000 2. 000 2. 000 4. 000 2. 000 2. 000 2. 000 Si〇2+P2〇5+B2〇3+GeQ2 42. 522 42. 522 42. 522 42. 522 42. 522 42. 522 42. 522 44. 522 Y2〇3+La2〇3+Gd2〇3 +Yb2〇3+Lu2〇3 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 nd 1. 8854 1. 8919 1. 8861 1. 8636 1. 8697 1. 8740 1. 8823 1. 8598 vd 25. 3 24. 9 25. 4 25. 8 25. 8 25. 7 24. 8 25. 7 0g ’ F 0. 60498 0. 60965 0. 60660 0. 60610 0. 60427 0. 60582 0. 60961 0. 60521 intercept b a=0. 00160 0. 64546 0. 64949 0. 64724 0. 64738 0. 64555 0. 64694 0. 64929 0. 64633 a=0. 00250 0. 66823 0. 67190 0. 67010 0. 67060 0. 66877 0. 67007 0. 67161 0. 66946 a=0. 00340 0. 69100 0. 69431 0. 69296 0. 69382 0. 69199 0. 69320 0. 69393 0. 69259 a=0. 00563 0. 74742 0. 74984 0. 74960 0. 75135 0. 74952 0. 75051 0. 74924 0. 74990 ^80 472. 5 503 477 447 471 454 466 448 into 7〇 393. 5 406 399. 5 396 408 397 403 397 into 5 350 357. 5 350. 5 346 348 348 350 348 43- 156904. Doc 201206856 [Table ίο] Example 71 72 73 74 75 76 77 78 Si02 43. 796 43. 796 43. 796 45. 522 43. 796 42. 522 42. 522 42. 522 Ta2〇5 6. 000 6. 000 6. 000 6. 000 6. 000 11. 000 11. 000 11. 000 Nb205 16. 341 16. 341 16. 341 16. 341 16. 341 13. 341 13. 341 13. 341 Ti02 0. 962 0. 962 0. 962 0. 962 0. 962 1. 962 1. 962 1. 962 W03 Li20 9. 129 10. 856 9. 229 9. 129 9. 129 14. 129 16. 129 14. 129 Na20 16. 659 16. 659 18. 386 16. 659 16. 659 11. 659 9. 659 9. 659 k2o MgO CaO SrO BaO ZnO 1. 726 P2〇5 B2〇3 Ge〇2 ai2o3 Zr02 5. 381 5. 381 5. 381 5. 381 7. 107 5. 381 5. 381 7. 381 Sbj〇3 0. 006 0. 006 0. 006 0. 006 0. 006 0. 006 0. 006 0. 006 Total 100. 00 100. 00 100. 00 100. 00 100. 00 100. 00 100. 00 100. 00 Nb2〇5+Ta2〇5+Na2〇+BaO 39. 000 39. 000 40. 726 39. 000 39. 000 36. 000 34. 000 34. 000 (Nb2〇5+Ta205)/ (Ti02+Bi203+W03) 23. 218 23. 218 23. 218 23. 218 23. 218 12. 405 12. 405 12. 405 (Nb2〇5+Ta2〇5+Na2〇+BaO)/ (Ti02+Bi203+W03) 40. 532 40. 532 42. 326 40. 532 40. 532 18. 347 17. 327 17. 327 Ta2〇5/(Nb205+Ta205) 0. 269 0. 269 0. 269 0. 269 0. 269 0. 452 0. 452 0. 452 Li2〇+Na2〇+K2〇+Cs2〇 25. 788 27. 515 27. 515 25. 788 25. 788 25. 788 25. 788 23. 788 Ta205/(Li20+Na20) 0. 233 0. 218 0. 218 0. 233 0. 233 0. 427 0. 427 0. 462 MgO+CaO+SrO+BaO+ZnO 1. 726 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 Si〇2+p2〇5+B2〇3+Ge〇2 43. 796 43. 796 43. 796 45. 522 43. 796 42. 522 42. 522 42. 522 "V2〇3+La2〇3+Gd2〇3 +Yb2〇3+Lll2〇3 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 nd 1. 8578 1. 8549 1. 8511 1. 8517 1. 8583 1. 8836 1. 8892 1. 8925 vd 25. 6 25. 7 25. 7 25. 6 25. 7 25. 4 25. 4 25. 4 0g ’ F 0. 60758 0. 60553 0. 60580 0. 60596 0. 60658 0. 60581 0. 60616 0. 60643 intercept b a=0. 00160 0. 64854 0. 64665 0. 64692 0. 64692 0. 64770 0. 64645 0. 64680 0. 64707 a=0. 00250 0. 67158 0. 66978 0. 67005 0. 66996 0. 67083 0. 66931 0. 66966 0. 66993 a=0. 00340 0. 69462 0. 69291 0. 69318 0. 69300 0. 69396 0. 69217 0. 69252 0. 69279 a=0. 00563 0. 75171 0. 75022 0. 75049 0. 75009 0. 75127 0. 74881 0. 749ΪΤ1 0. 74943 λ«ο 445. 5 456 450. 5 445 446. 5 464 468 475 λ70 393. 5 399. 5 394. 5 394 394 397 401 401 into 5 348 348 347 348. 5 348. 5 349 350 351 44 · 156904. Doc 201206856 [Table 11] Examples Comparative Example 79 80 1 2 SiO? 42. 522 40. 522 40,000 40. 000 Ta2〇5 11. 000 11. 000 0. 690 Nb2〇5 13. 341 13. 341 14. 480 14. 470 Ti02 1. 962 1. 962 12. 410 12. 410 WO, 2. 760 2. 760 Li20 14. 129 16. 129 1. 380 6. 210 Na20 9. 659 11. 659 7. 590 7. 590 K20 13. 100 7. 590 MgO CaO 1. 380 1. 380 SrO BaO 2. 000 1. 380 1. 380 ZnO p205 B203 1. 380 1. 380 Ge02 ai2〇3 Zr02 5. 381 5. 381 4. 140 4. 140 Sb203 0. 006 0. 006 Total 100. 00 100. 00 100. 00 100. 00 Nb2〇5+Ta2〇5+Na20+BaO 36. 000 36. 000 23. 450 24. 130 (Nb2〇5+Ta2〇5)/ (Ti02+Bi203+W03) 12. 405 12. 405 0. 955 0. 999 (Nb2〇5+Ta2〇5+Na20+BaO) /(Ti02+Bi203+W03) 18. 347 18. 347 1. 546 1. 591 T&2〇5/(Nb2〇5+丁a〗〇5) 0. 452 0. 452 0. 000 0. 046 Li2〇+Na2〇+K2〇+Cs2〇 23. 788 27. 788 22. 070 21. 390 Ta205/(Li20+Na20) 0. 462 0. 396 0. 000 0. 050 MgO+CaO+SrO+BaO+ZnO 2. 000 0. 000 2. 760 2. 760 Si〇2+p2〇5+B2〇3+Ge〇2 42. 522 40. 522 41. 380 41. 380 Y2〇3+La2〇3+Gd2〇3 +Yb2〇3+Lu2〇3 0. 000 0. 000 1. 000 2. 000 nd 1. 8917 1. 8895 1. 8132 1. 8491 vd 25. 4 25. 4 25. 1 24. 0 0g, F 0. 60690 0. 60645 0. 61500 0. 62100 intercept b a=0. 00160 0. 64754 0. 64709 0. 65516 0. 65940 a=0. 00250 0. 67040 0. 66995 0. 67775 0. 68100 a=0. 00340 0. 69326 0. 69281 0. 70034 0. 70260 a=0. 00563 0. 74990 0. 74945 0. 75631 0. 75612 ^80 468 461 ^70 399 397 λ5 350 348 45- 156904. Doc 201206856 [Table 12] Example 81 82 83 84 85 86 87 88 Si02 42. 500 42,500 41. 629 40. 000 40. 004 40. 000 43. 922 39. 608 Ta2〇5 5. 205 5. 205 7. 143 8. 821 8. 821 8. 821 8. 821 8. 735 Nb205 13. 898 12. 856 13. 613 13. 080 12. 101 11. 897 12. 100 12. 952 Ti02 4. 128 4. 128 4. 043 3. 885 3. 886 3. 885 3. 885 3. 847 W03 Li20 12. 641 13. 682 12. 377 11. 897 11. 898 11. 897 12. 877 11. 776 Na20 12. 147 14. 230 13. 938 13. 394 13. 394 13. 393 13. 393 13. 261 k2o MgO 0. 980 CaO SrO BaO 2. 083 0. 980 0. 980 ZnO 1. 795 1. 795 1. 761 1. 689 1. 689 1. 689 1. 689 4. 588 p2〇5 B2O3 1. 961 Ge〇2 1. 961 1. 961 ai2o3 Zr02 5. 602 5. 602 5. 491 5. 273 5. 273 5. 273 2. 331 5. 224 Sb2〇3 0. 006 Total 100 100 100 100 100 100 100 100 Nb2〇5+Ta2〇5+Na20+BaO 33. 334 32. 292 34. 694 35. 295 35. 298 35. 091 34. 314 34. 949 (Nb205+Ta2〇5)/ (Ti02+Bi203+W03) 4. 628 4. 375 5. 134 5. 637 5. 385 5. 332 5. 385 5. 638 (Nb205+Ta2〇5+Na2〇+BaO)/ (Ti02+Bi203+W03) 8. 075 7. 822 8. 582 9. 084 9. 084 9. 032 8. 832 9. 086 Ta2〇5/(Nb2〇5+Ta2〇5) 0. 272 0. 288 0. 344 0. 403 0. 422 0. 426 0. 422 0. 403 Li2〇+Na20+K2〇+Cs2〇 24. 788 27. 913 26. 314 25. 291 25. 293 25. 290 26. 271 25. 037 Ta205/(Li20+Na20) 0. 210 0. 186 0. 271 0. 349 0. 349 0. 349 0. 336 0. 349 Si〇2+P2〇5+B2〇3+Ge〇2 42. 500 42. 500 41. 629 41. 961 41. 965 41. 961 43. 922 39. 608 MgO+CaO+SrO+BaO+ZnO 3. 878 1. 795 1. 761 1. 689 2. 670 2. 670 2. 670 4. 588 Y 2〇3+La2〇3+G d2〇3 +Yb2〇3+Lu203 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 nd 1. 8575 1. 8401 1. 8668 1. 8749 1. 8689 1. 8673 1. 8537 1. 8815 vd 26. 1 26. 6 26. 5 25. 3 25. 8 25. 8 25. 9 25. 4 0g ’ F 0. 60614 0. 60298 0. 60602 0. 60740 0. 60534 0. 60471 0. 60419 0. 60580 intercept b a=0. 00160 0. 64790 0. 64554 0. 64842 0. 64788 0. 64662 0. 64599 0. 64563 0. 64644 a=0. 00250 0. 67139 0. 66948 0. 67227 0. 67065 0. 66984 0. 66921 0. 66894 0. 66930 a=0. 00340 0. 69488 0. 69342 0. 69612 0. 69342 0. 69306 0. 69243 0. 69225 0. 69216 a=0. 00563 0. 75309 0. 75274 0. 75521 0. 74984 0. 75060 0. 74996 0. 75001 0. 74880 449. 5 429. 5 449. 5 450. 5 439. 5 444 429 461 into 70 398 387. 5 392. 5 397 387 386 383. 5 400. 5 long 5 351. 5 348. 5 351. 5 352 350 345 349. 5 352 Styling test Δ Δ Δ Δ Δ Δ 0 Δ • 46- 156904. Doc 201206856 [Table 13] Example 89 90 91 92 93 94 95 96 Si02 43. 922 43. 922 43. 922 44. 522 44. 522 38. 911 42. 522 42. 016 Ta2〇5 8. 821 8. 821 8. 821 11. 000 11. 000 11. 111 7. 500 8. 398 Nb2〇5 11. 120 12. 100 12. 100 9. 341 11. 341 10. 445 13. 341 12. 955 Ti02 4. 866 2. 905 3. 885 3. 962 3. 962 4. 002 3. 362 2. 695 W03 0. 980 Li20 12. 877 12. 877 12. 877 14. 129 17. 129 14. 272 16. 129 15. 938 Na20 13. 393 13. 393 13. 393 11. 659 11. 659 11. 777 11. 659 11. 516 K20 MgO CaO SrO BaO ZnO 1. 689 1. 689 1. 689 P2〇5 B2〇3 Ge02 4. 040 Al2〇3 Zr02 3. 312 3. 312 3. 312 5. 381 0. 381 5. 435 5. 381 6. 803 Sb203 0. 008 Total 100 100 100 100 100 100 100 100 Nb2〇5+Ta2〇5+Na20+BaO 33. 333 34. 314 34. 314 32. 000 34. 000 33. 333 32. 500 32. 869 (Nb2〇5+Ta2〇5)/ (Ti02+Bi20,+W03) 4. 098 5. 385 5. 385 5. 134 5. 639 5. 386 6,199 7. 923 (Nb2〇5-*-Ta2〇5+Na20+BaO)/ (Ti02+Bi203+W03) 6. 851 8. 832 8. 832 8. 077 8. 582 8. 329 9. 667 12. 196 Ta2〇5, (Nb2〇5+Ta2〇5) 0. 442 0. 422 0. 422 0. 541 0. 492 0. 515 0. 360 0. 393 Li2〇+Na2〇+K2〇+Cs2〇 26. 271 26. 271 26. 271 25. 788 28. 788 26. 048 27. 788 27. 455 Ta205/(Li20+Na20) 0. 336 0. 336 0. 336 0. 427 0. 382 0. 427 0. 270 0. 306 Si〇2+p2〇5+B2〇3+Ge〇2 43. 922 43. 922 43. 922 44. 522 44. 522 42. 952 42. 522 42. 016 MgO+CaO+SrO+BaO+ZnO 1. 689 1. 689 1. 689 0. 000 0. 000 0. 000 0. 000 0. 000 Y 2〇3+La2〇3+Gd2〇3 +Yb2〇3+L\l2〇3 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 nd 1. 8511 1. 8586 1. 8552 1. 8609 1. 8587 1. 8749 1. 8620 1. 8708 vd 26. 1 25. 9 25. 9 26. 3 25. 9 25. 9 26 26 eg ’ f 0. 60582 0. 60960 0. 60303 0. 60324 0. 60542 0. 60432 0. 60561 0. 60364 intercept b a=0. 00160 0. 64758 0. 65104 0. 64447 0. 64532 0. 64686 0. 64576 0. 64721 0. 64524 a=0. 00250 0. 67107 0. 67435 0. 66778 0. 66899 0. 67017 0. 66907 0. 67061 0. 66864 a=0. 00340 0. 69456 0. 69766 0. 69109 0. 69266 0. 69348 0. 69238 0. 69401 0. 69204 a=0. 00563 0. 75276 0. 75542 0. 74885 0. 75131 0. 75124 0. 75014 0. 75199 0. 75002 into 80 434. 5 436. 5 434. 5 428 467 470. 5 457. 5 465 into 70 385 385. 5 385. 5 384. 5 403 397 398. 5 400 λ5 351 350. 5 349. 5 351 351 351 350. 5 350. 5 Styling test Δ Δ 0 0 0 Δ 0 ο • 47· 156904. Doc 201206856 [Table 14] Example 97 98 99 100 101 102 103 104 105 Si02 42. 522 44. 522 43. 387 41. 688 42. 822 43. 935 42. 425 40. 345 40. 669 Ta2〇5 11. 000 11. 000 10. 717 8. 333 8. 560 8. 399 8. 480 9. 966 9. 242 Nb2〇5 11. 341 13. 341 11. 575 13. 079 13. 435 13. 171 13. 292 9. 438 9. 514 Ti02 1. 962 1. 962 4,047 1. 924 2. 278 2. 234 2. 704 8. 160 8. 141 WO3 0. 686 Li20 14. 129 14. 129 14. 677 15. 813 16. 243 15. 920 16. 091 17. 564 17. 705 Na20 11. 659 9. 659 12. 154 11. 430 11. 741 11. 510 11. 625 9. 415 9. 491 K20 MgO 1. 000 CaO SrO BaO ZnO p2〇5 b2〇3 Ge〇2 1. 000 Al2〇3 Zr02 5. 381 5. 381 3. 442 6. 746 4. 915 4. 819 5. 372 5. 100 5. 141 Sb2〇3 0. 006 0. 006 0. 008 0. 008 0. 008 0. 008 0. 008 0. 008 0. 008 Total 100 100 100 100 100 100 100 100 100 Nb2〇5+Ta2〇5+Na2〇+BaO 34. 000 34. 000 34. 446 32. 843 33. 736 33. 080 33. 397 28. 819 28. 247 (Nb2〇5+Ta2〇5)/ (Ti02+Bi203+W03) 11. 387 12. 406 5. 508 8. 205 9. 656 9. 655 8. 052 2. 378 2. 304 (Nb2〇5+Ta2〇5+Na2〇+BaO)/ (Ti02+Bi203+W03) 17. 329 17. 329 8. 511 12. 585 14. 810 14. 808 12. 351 3. 532 3. 470 Ta2〇5, (Nb2〇5+Ta2〇5) 0. 492 0. 452 0. 481 0. 389 0. 389 0. 389 0. 389 0. 514 0. 493 Li2〇+Na20+K2〇+Cs2〇 25. 788 23. 788 26. 831 27. 243 27. 984 27. 430 27. 716 26. 979 27. 196 Ta2〇5/(Li2〇+Na20) 0. 427 0. 462 0. 399 0. 306 0. 306 0. 306 0. 306 0. 369 0. 340 Si〇2~Hp2〇5+B2〇3+Ge〇2 43. 522 44. 522 43. 387 41. 688 42. 822 43. 935 42. 425 40. 345 40. 669 MgO+CaO+SrO+BaO+ZnO 1. 000 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 Y2〇3+La2〇3+Gd2〇3 +Yb203+Lu203 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 nd 1. 8664 1. 8881 1. 8703 1. 8628 1. 8704 1. 8614 1. 8673 1. 8810 1. 8758 vd 26. 3 25. 3 25. 6 26. 1 25. 9 26. 1 25. 9 25. 4 25. 6 0g, F 0. 60200 0. 60751 0. 60488 0. 60557 0. 60369 0. 60461 0. 60377 0. 60519 0. 60672 intercept b a=0. 00160 0. 64408 0. 64799 0. 64584 0. 64733 0. 64513 0. 64637 0. 64521 0. 64583 0. 64768 a=0. 00250 0. 66775 0. 67076 0. 66888 0. 67082 0. 66844 0. 66986 0. 66852 0. 66869 0. 67072 a=0. 00340 0. 69142 0. 69353 0. 69192 0. 69431 0. 69175 0. 69335 0. 69183 0. 69155 0. 69376 a=0. 00563 0,75007 0. 74995 0. 74901 0. 75252 0. 74951 0. 75155 0. 74958 0. 74820 0. 75084 into 80 444 478. 5 457 460 459. 5 440. 5 449. 5 470 460 ^70 387. 5 404. 5 394. 5 398 401 390 394 402. 5 399. 5 λ5 346. 5 352 351 349. 5 348. 5 348 349 356. 5 356. 5 stereotype test Δ Δ Δ Δ 0 0 0 0 0 · 48 · 156904. Doc 201206856 [Table 15] Example 106 107 108 109 110 111 112 113 Si02 38. 984 42. 819 40. 454 40. 111 41. 974 42. 205 40. 609 40. 924 Τ&2〇5 7. 792 8. 362 8. 086 8. 015 9. 258 8. 758 12. 110 11. 857 Nb2〇5 12. 121 13. 106 12. 578 12. 513 10. 625 10. 683 9. 716 10. 237 Ti02 4. 659 2. 666 4. 835 3. 875 5. 818 5. 851 4. 428 4. 550 W03 Li20 21. 793 16. 653 15. 333 18. 683 16. 236 16. 325 20. 117 17. 988 Na20 7. 257 11. 086 11. 042 9. 295 10. 771 10. 831 7. 882 9. 262 K20 MgO CaO SrO BaO ZnO P2〇5 B2〇3 Ge02 AI2O3 Zr02 7. 382 5. 297 7. 660 7. 496 5. 306 5. 335 5. 126 5. 170 Sb2〇3 0. 011 0. 012 0. 012 0. 012 0. 012 0. 012 0. 008 0. 008 Total 100. 00 100. 00 100. 00 100. 00 100. 00 100. 00 100. 00 100. 00 Nb2〇5+Ta2〇5+Na2〇+BaO 27. 170 32. 554 31. 706 29. 823 30. 654 30. 272 29. 708 31. 356 (Nb2〇5+Ta2〇5)/ (Ti02+Bi203+W03) 4. 274 8. 053 4. 274 5. 298 3. 417 3. 323 4. 929 4. 856 (Nb2〇5+Ta2〇5+Na20+BaO)/ (Ti02+Bi203+W03) 5. 832 12. 211 6. 558 7. 696 5. 269 5. 174 6. 709 6. 891 Ta2〇5/CNl)2〇5+Ta2〇5) 0. 391 0. 390 0. 391 0. 390 0. 466 0. 450 0. 555 0. 537 Li2〇+Na2〇+K2〇+Cs2〇 29. 050 27. 739 26. 375 27. 978 27. 007 27. 156 27. 999 27. 250 Ta205/(Li20+Na20) 0. 268 0. 301 0. 307 0. 286 0. 343 0. 323 0. 433 0. 435 MgO+CaO+SrO+BaO+ZnO 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 Si〇2+P2〇5+B2〇3+Ge〇2 38. 984 42. 819 40. 454 40. 111 41. 974 42. 205 40. 609 40. 924 Y 2〇3+La2〇3+Gd2〇3 +Yb2〇3+Lu2〇3 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 nd 1. 88235 1. 86498 1. 88038 1. 87758 1. 86735 1. 86329 1. 88339 1. 88416 vd 26. 1 26. 1 25. 6 26. 0 25. 9 26. 0 26. 1 25. 8 0g, F 0. 60319 0. 60400 0. 60570 0. 60451 0. 60448 0. 60506 0. 60506 0. 60260 intercept b a=0. 00160 0. 64487 0. 64568 0. 64660 0. 64613 0. 64590 0. 64671 0. 64674 0. 64386 a=0. 00250 0. 66832 0. 66913 0. 66960 0. 66955 0. 66921 0. 67013 0. 67019 0. 66708 a=0. 00340 0. 69176 0. 69257 0. 69260 0. 69297 0. 69251 0. 69355 0. 69363 0. 69029 a=0_00563 0. 74986 0. 75066 0. 74960 0. 75099 0. 75024 0. 75159 0. 75173 0. 74780 乂80 476. 5 460 501. 5 496 474. 5 476 466 468 ^70 405 399. 5 408. 5 411. 5 408 407. 5 398. 5 395. 5 λ5 353. 5 349. 5 354 353. 5 355. 5 355 351. 5 352. 5 stereotype test 0 -49- 156904. Doc 201206856 [Table 16] Example 114 115 116 117 118 119 Si02 40. 796 40. 796 40. 796 37. 796 37. 796 37. 796 Ti32〇5 Nb2〇5 16. 341 16. 341 16. 341 16. 341 16. 341 16. 341 Na20 16. 659 19. 659 18. 385 19. 659 16. 659 16. 659 BaO Ti02 6. 962 6. 962 6. 962 6. 962 6. 962 6. 962 Bi203 W03 Li20 12. 129 9. 129 12. 129 12. 129 15. 129 12. 129 K20 p2〇5 B2O3 Ge〇2 MgO CaO SrO ZnO 1. 726 1. 726 1. 726 1. 726 4. 726 Te02 ai2o3 Zr02 5. 381 5. 381 5. 381 5. 381 5. 381 5. 381 Sb〗 〇 3 0. 006 0. 006 0. 006 0. 006 0. 006 0. 006 Total 100. 00 100. 00 100. 00 100. 00 100. 00 100. 00 Nb2〇5+Ta2〇5+Na20+BaO 33. 000 36. 000 34. 726 36. 000 33. 000 33. 000 (Nb2〇5+Ta2〇5+Na20+BaO)/ (Ti02+Bi203+W03) 4. 740 5. 171 4. 988 5. 171 4. 740 4. 740 Li20+Na20 +K2O+CS2O 28. 788 28. 788 30. 514 31. 788 31. 788 28. 788 Ta205/(Li20+Na20) 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 Si〇2+P2〇5+B2〇3+Ge〇2 40. 796 40. 796 40. 796 37. 796 37. 796 37. 796 MgO+CaO+SrO +BaO+ZnO 1. 726 1. 726 0. 000 1. 726 1. 726 4. 726 Y2〇3+La2〇3+Gd2〇3 +Yb2〇3+Lu2〇3 0. 000 0. 000 0. 000 0. 000 0. 000 0. 000 nd 1. 8381 1. 8311 1. 8309 1. 8348 1. 8484 1. 8473 vd 25. 7 25. 7 25. 9 25. 9 25. 7 25. 6 0g ’ F 0. 60759 0. 60661 0. 60741 0. 60658 0. 60763 0. 60852 intercept b a=0. 00160 0. 64871 0. 64773 0. 64885 0. 64802 0. 64875 0. 64948 a=0. 00250 0. 67184 0. 67086 0. 67216 0. 67133 0. 67188 0. 67252 a=0. 00340 0. 69497 0. 69399 0. 69547 0. 69464 0. 69501 0. 69556 a=0. 00563 0. 75228 0. 75130 0. 75323 0. 75239 0. 75232 0. 75265 into 80 λ70 408 403. 5 402 411. 5 411. 5 409 λ5 355. 5 355 354 353. 5 353. 5 355 -50- 156904. Doc 201206856 As shown in Table 1 to Table 16, the partial dispersion ratio (0g 'F) of the optical glass system Vd$25 of the embodiment of the present invention is (-〇. 〇〇563xvd+0. 75573) Below, more detailed (-〇. 〇〇563xvd+0. 75001) below. Also, the partial dispersion ratio (eg, F) of Vd > 25 is (-0. 00340xVd+0. 70000) below, more detailed (-0. 00340xvd+0. 69844) Below. On the other hand, the partial dispersion ratio (eg, F) of the optical glass system vd$25 of the embodiment of the present invention is (_0 〇〇 16 〇χ vd + 0. 63460) Above, more detailed is (_〇. 0〇16〇XVd+〇 64571) above. Also, the partial dispersion ratio (0g, F) of 'vd> 25 is (_〇 〇〇25〇XVd+〇 6471〇) or more' in more detail (-0. 00250xvd+0. 66708) Above. Therefore, it can be seen that the partial dispersion ratios (eg, F) are within the desired range. On the other hand, the comparative example of the present invention (No. i) The glass, although Vd>25, has a partial dispersion ratio (9g, F) exceeding (_0. 0034〇XVd+0 70000). Further, a comparative example of the present invention (^〇. 2) Although the glass is ^$25, the partial dispersion ratio (0 each, 〇 exceeds (-0. 0〇563xVd+〇. According to &, it is understood that the optical glass of the embodiment of the present invention has a smaller central dispersion ratio (0g, F) in the relationship of the Abbe number (6) than the glass of the comparative example. Further, an embodiment of the present invention <The refractive index of optical glass (6) is! η or more' is more specifically h83 or more, and the refractive index (nd) is 2.20 or less, and more specifically 1.92 or less, which is within a desired range. Further, the Abbe's number (6) of the optical glass according to the embodiment of the present invention is (4) more than the thickness of 23, and the Abbe number (vd) is 30 or less, and more preferably 27 or less, as expected. Within the scope. The optical glass has a refractive index (nd) and a transmittance to visible light. Therefore, it is understood that the Abbe number (vd) of the embodiment of the present invention is within a desired range, 156904.doc • 51-201206856 high' and The reduction in color difference is effective. Further, the optical glass of the embodiment of the present invention does not cause both devitrification and opalescence before and after the reheat test (^). Therefore, it is understood that the optical glass of the embodiment of the present invention is less likely to cause devitrification or opalescence caused by reheating, and therefore it is presumed to have high press formability. The present invention has been described in detail with reference to the embodiments of the present invention, and it is understood that the present invention is intended to be illustrative only, and various modifications may be made without departing from the spirit and scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a partial dispersion ratio (0g, F) represented by orthogonal coordinates of the vertical axis and an Abbe number (vd) represented by a normal line indicated by orthogonal coordinates of the horizontal axis. Fig. 2 is a graph showing the relationship between the partial dispersion ratio (0g, F) and the Abbe number (Vd) of the glass of the embodiment of the present application. 156904.doc -52·

Claims (1)

201206856 VII. Patent application scope: 1. An optical glass containing a Si〇2 component and one or more selected from the group consisting of Ta205 component, Nb>2〇5 component, Na2〇 component, and BaO component, and The partial dispersion ratio (0g 'F) and the Abbe number (Vd) satisfy (-〇.〇〇16〇xvd+〇.6346〇)$(0g, (-0.005 63xvd+0.75 573) in the range of vdS25. The relationship satisfies the relationship of (-〇.〇〇25〇xvd+〇.6571〇)g(0g 'F)$(-〇.〇〇34〇xvd+0.7〇〇〇〇) within the range of vd>25. (2) The optical glass of claim 1, which contains 60.0% or less of the Si〇2 component and 25.0% or less of the Ta2〇5 component in terms of mol% of the total glass mass of the oxide conversion composition. The optical glass of claim 1 which contains 20,0 to 60.0% of the Si〇2 component and 2.15 to 25.0% of the D&2〇5 component in terms of mol% of the total glass composition of the composition of the telluride. 4. The optical glass of claim 1, which contains 2 〇〇 to 6 〇〇% of the Si 〇 2 component in terms of mol% of the glass composition of the oxide conversion composition, and is selected The sum of the content of one or more of the group consisting of the free Ta205 component and the Nb205 component 'Na2〇 component and the Ba〇 component is 2% by mass or more and 50.0% or less. 5. The optical glass of claim 4 is relative to The total mass of the glass in terms of oxide conversion, in terms of mole %, contains: 0~25.〇%iTa2〇5 component and/or 0~3〇.0%iNb2〇5 component and/or 〇~3〇.〇 %2Na2〇 component and/or 156904.doc 201206856 〇~30.0% of BaO component: 6_ The optical glass of claim 1 which contains the molar mass of the glass in terms of oxide composition, and further contains: 〇30.0% of the Nb205 component and/or 〇20.0% of the Ti〇2 component and/or 〇10.0% of the Bi203 component and/or the 〇10.0% of the W03 component. 7. The optical glass of claim 6 The molar ratio (Nb2〇5+Ta2〇5)/(Ti〇2+Bi2〇3 + w〇3); ^^2.50. 8. The optical glass of claim 6, wherein the oxide The molar ratio (Nb2〇5+Ta2〇5+Na2〇+Ba〇)/(Ti〇2+Bi2〇3+w〇3) of the converted composition is 3% or more and 5 0.0 〇 or less. Optical glass of 1 The total mass of the glass in the oxide-converted composition further includes: 5% to 30.0% of the Li20 component and/or 〇3 to 〇% of the Na20 component and/or 〇20.0% of the K20 component. / or 〇 ~10.0 ° /. The Cs20 ingredient. The optical glass of claim 9, wherein the sum of the contents of the RhO component (wherein Rn is selected from the group consisting of Li, Na, K, and Cs) is equivalent to the oxide conversion composition. The total mass of the glass is 1% or more and 50.0% or less. 11. The optical glass of claim 1, wherein the molar ratio of the molar composition Ta205/(Li2〇+Na20) is 0.010 or more and 〇5〇〇 or less. 156904.doc 201206856 12. 13. 14. 15. 16. The optical glass of claim 1 which, in relation to the oxide-converted composition of the total mass of the glass, further comprises: 0 to 15.0% of the MgO component. And/or 0 to 20.0% of the CaO component and/or 0 to 20.0% of the SrO component and/or 0 to 30.0% of the BaO component and/or 0 to 30.0% of the ZnO component. The optical glass of claim 12, wherein the sum of the contents of the R0 component (wherein Han is selected from the group consisting of Mg, Ca, Sr, Ba, and Zn) is relative to the oxide-converted glass. The whole product quality is below 3〇〇%. The optical glass of claim 1 which further comprises, in mol%, of the total mass of the glass in terms of oxide conversion: 0 to 20.0%! > 2〇5 component and/or 〇~3〇.〇 % of 32 〇 3 components and / or 0 to 20.0% of Ge02 components. The optical glass of the item 1 is obtained by the sum of the total mass of the glass (for 〇2+1>2〇5+32〇3+(^〇2) with respect to the composition of the oxide (2〇% or more) 60% or less. For example, the optical glass of Kiss 1 has a glass mass of the composition of the oxide, and further contains, in terms of mole %, 0:3 〇.〇°/❶之Υ2〇3 component And/or 0 to 30.0% of La2〇3 component and/or 〇30.0% of Gd2〇3 component and/or 156904.doc 201206856 0~20.0% of Yb203 component and/or 0~10.0% of Lu203 component” 17 The optical glass of the item 16, wherein [the composition of the Ο3 component (where & is selected from the group consisting of Y, La, Gd, Yb, and Lu) is relative to the oxide. The quality of the whole glass of the composition is 3% or less. 18. The optical glass of the claim ,, which is based on the total mass of the glass in terms of oxide conversion, further contains: 0 to 30.0% Te02 component and/or 0~20.0% ai2o3 component and/or 〇20.0% Ga203 component and/or 〇20.0% in2〇3 component and/or 〇20.0% Zr02 component and/or 〇 1.0% of the Sb203 component and/or 1.01.0% of the Ce02 component. 19. The optical glass of the claim item has a refractive index (nd) of 175 or more and 2 Å or less and has 2 or more and 4 or less. Abbe number (v〇. 20. The optical glass of claim 1 wherein the wavelength of the spectral transmittance of 7〇% (^>7.) is 500 nm or less. 21. The optical glass of claim 1 It did not produce devitrification and opalescence before and after the reheating test (^), [reheating test (4): reheating the test piece of 15 mm><15 mm x 30 rnm' took 150 minutes to warm up from room temperature to each test The transfer temperature (Tg) is as high as 80. (: ~150. (: The temperature, in the above-mentioned optical glass 156904.doc 201206856 glass transfer temperature (Tg) high 8〇t~15 (temperature at TC 30 After that, it was naturally cooled to normal temperature, and the opposite sides of the test piece were polished to a thickness of 10 mm, and then visually observed. 22. 22. A preform for polishing processing and/or precision press molding, It comprises the optical glass of any one of claims 1 to 21. 23. An optical component that is ground and/or An optical glass as polished request from any one of 1 to 24. 21 - such an optical element 'which is based on the requested item as a pressure to the optical glass for precision molding according to any one of 21 made. 156904.doc