Optical glass and optical element

A technology of optical glass and optical components, applied in optical components, optics, instruments, etc., can solve the problems of unfavorable industrial production, easy devitrification of glass, high glass price, etc., and achieve good chemical stability, high transmittance, high The effect of high dispersion of refraction

Active Publication Date: 2017-05-10
CDGM OPTICAL GLASS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The glass disclosed in JP2004-161598 has the problem of easy devitrification, and the composition may also contain GeO 2 This expensive component will make the price of glass high, which is not conducive to industrial production

Method used

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  • Optical glass and optical element
  • Optical glass and optical element
  • Optical glass and optical element

Examples

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Embodiment

[0046] 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.

[0047] The optical glass components (expressed by weight percentage of cations) provided by Examples 1 to 30 of the present invention and their corresponding properties are shown in Tables 1 to 3. By weighing the oxides and carbonates corresponding to the various cations 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, melting them at an appropriate process temperature, After clarification, stirring and homogenization, and cooling to a suitable temperature...

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Abstract

The invention provides optical glass with a high refractive index, high dispersion, small relative partial dispersion Pg,F, high transmittance and good chemical stability, and an optical element. The negative ion of the optical glass is O <2->; and the positive ions of the optical glass comprise, by weight, 12 to 25% of Si<4+>, 58 to 75% of Nb<5+>, W<6+> and Zr<4+>, 8 to 25% of Li<+>, Na<+> and K<+>, and 10% or less Ba<2+>. Through reasonable design of the above components, the optical glass has a refractive index of 1.81 to 1.89 and an Abbe number of 20 to 29, the Pg,F of the optical glass is in a range of 0.5956 to 0.6199, and when the transmittance of the optical glass reaches 70%, a corresponding wavelength lambda70 is below 450 nm; so the optical glass is applicable to high-quality optical elements.

Description

technical field [0001] The invention relates to an optical glass and an optical element. The optical glass has a refractive index (nd) of 1.81 to 1.89 and an Abbe number (νd) of 20 to 29, in particular to a kind of high refraction and high dispersion, relative partial dispersion Pg , Optical glass and optical elements with small F, high transmittance and good chemical stability. Background technique [0002] High-refraction and high-dispersion optical glass is a very important part of optical instruments and optoelectronic products. In recent years, with the widespread popularity of optoelectronic products such as smart phones and SLR cameras, higher requirements have been put forward for the performance of this type of optical glass. That is to reduce its Pg, F, so as to better improve the chromatic aberration, thereby further improving the imaging quality of the optical lens. [0003] Currently known to use SiO 2 -TiO 2 -Nb 2 o 5 -Na 2 Optical glass with high refract...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/062C03C3/064G02B1/00
CPCC03C3/062C03C3/064G02B1/00C03C3/066C03C4/0092C03C4/20C03C2204/00
Inventor 袁伟
Owner CDGM OPTICAL GLASS
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