Optical Glass and Optical Components
A technology of optical glass and optical components, applied in the direction of optical components, optics, instruments, etc., can solve the problems of high dispersion, rare "limit" glass, small dispersion, etc., and achieve the effect of reducing dispersion
Active Publication Date: 2019-06-25
CDGM OPTICAL GLASS
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Problems solved by technology
[0003] For glasses with high refraction and low dispersion, the dispersion becomes smaller while maintaining a high refractive index. The above-mentioned glasses are in demand in the market, but such "extreme" glasses are rare
The disclosed optical glass of CN1377847 contains a large amount of Nb 2 o 5 , and its dispersion is still high, which cannot meet the current requirements for high refraction and low dispersion glass
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[0049] In order to further understand the technical solutions of the present invention, preferred embodiments of the present invention will be described in conjunction with the following specific examples. However, it should be noted and understood that these examples are only for better illustrating the features and advantages of the present invention, and do not limit the claims of the present invention.
[0050] The optical glass components provided by Examples 1 to 30 of the present invention (respectively represented by anion and cation weight percentages) and their corresponding properties are shown in Tables 1 to 3. By weighing the oxides, fluorides, carbonates, etc. corresponding to the various cations and anions of the optical glass in the various examples in Tables 1 to 3 according to their ratios, mixing them thoroughly and adding them into the optical glass melting furnace, in an appropriate process After melting, clarification, stirring and homogenizing at high te...
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Abstract
The invention provides an optical glass with a refractive index of 1.78-1.83 and an Abbe number of 48-53. Optical glass, the weight percent composition of its cations contains: Si 4+ : Greater than 0 but less than or equal to 15%; B 3+ : greater than 0 but less than or equal to 20%, where Si 4+ / B 3+ 0.5~1; La 3+ : 42~58%; Gd 3+ : 18~33%; Y 3+ : 1~15%; Ta 5+ : Greater than 0 but less than or equal to 10%; Zr 4+ : 0~10%; its anion contains O 2‑ and F ‑ , where, F ‑ / O 2‑ is greater than 0 but less than or equal to 0.3. The present invention introduces an appropriate amount of rare earth ions La through reasonable component design 3+ 、Gd 3+ , Y 3+ , and a small amount of F ‑ , reduce the dispersion of the glass, and obtain an optical glass with high refraction and low dispersion, which is suitable for high-quality optical components.
Description
technical field [0001] The invention relates to an optical glass, in particular to an optical glass with high refraction and low dispersion, as well as a preform and an optical element formed from the glass. Background technique [0002] The lens formed by the high refraction and low dispersion optical glass can be combined with the high refraction and high dispersion lens to eliminate the chromatic aberration of the optical system, so that the optical system is more compact and has better performance. Therefore, the market demand for high-refraction and low-dispersion glass with a refractive index of 1.78-1.83 and an Abbe number of 48-53 will increase. [0003] For glasses with high refraction and low dispersion, the dispersion becomes smaller while maintaining a high refractive index. The above-mentioned glasses are in demand in the market, but such "extreme" glasses are rare. The disclosed optical glass of CN1377847 contains a large amount of Nb 2 o 5 , and its dispers...
Claims
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IPC IPC(8): C03C3/068G02B1/00
CPCC03C3/068G02B1/00
Inventor 袁伟
Owner CDGM OPTICAL GLASS