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Optical glass

A technology of optical glass and scope, applied in the field of low dispersion optical glass and high refraction, it can solve the problems of large chromatic aberration, inability to maintain the precision surface of metal molds, optical quality needs to be improved, etc., to achieve the best optical quality effect

Inactive Publication Date: 2013-01-02
NATIONAL UNITED UNIVERSITY
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, although phosphate-based optical glass can solve the problem that the precision surface of the metal mold cannot be maintained when the optical glass containing lead oxide is produced, the Abbe number is low, that is, the chromatic aberration is large, in other words, the optical quality still needs to be improved

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Embodiment Construction

[0018] Now cite several preferred embodiments of the present invention to be described in further detail as follows:

[0019] The optical glass (strontium niobium phosphate glass) of a preferred embodiment of the present invention is mainly made of phosphorus pentoxide (P 2 o 5 ), niobium pentoxide (Nb 2 o 5 ) and strontium oxide (SrO) and other components, and the mole percentage of each component is as follows:

[0020] Phosphorus pentoxide 30mol%~60mol%

[0021] Niobium pentoxide 0~25mol%

[0022] Strontium oxide 30mol% ~ 50mol%.

[0023] Phosphorus pentoxide is a glass forming agent. As the main component of glass, it can endow glass with high dispersion characteristics and high light transmittance. Compared with silicate glass and borate glass, phosphorus pentoxide can endow glass with excellent melting Properties and resistance to devitrification, especially resistance to devitrification during pressing and excellent light transmittance.

[0024] Niobium pentoxide...

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Abstract

The invention discloses optical glass. The optical glass contains, calculated by mole percentage using oxide as reference, contains phosphorus pentoxide (P2O5) 30-40, columbic anhydride (Nb2O5) 7.5-20 and strontium oxide (SrO) 40-52.5; and has refractive index (nd) ranging between 1.64 and 1.73 and Abbe number (vd) ranging between 32.2 and 46.7. The optical glass has high refractive index, high Abbe number compared with phosphate optical glass, and good optical quality.

Description

technical field [0001] The present invention relates to optical glass, more specifically refers to a kind of optical glass with high refraction and low dispersion (small chromatic aberration), whose refractive index (nd) is in the range of 1.64 to 1.73 and Abbe number (vd) is 32.2 to a range of 46.7. Background technique [0002] At present, two important parameters of optical glass are refractive index and Abbe number (also known as dispersion index). Abbe number is used to measure the degree of light dispersion of the medium. The smaller the Abbe number, the greater the degree of light dispersion. The larger the bei number, the smaller the degree of light dispersion, that is, the smaller the chromatic aberration. It is known that the optical glass with high refractive index is represented by a composition containing a large amount of lead oxide. Due to the good stability of the glass and the glass transition point (T g ) is low, so it is used as precision molding. For ex...

Claims

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Application Information

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IPC IPC(8): C03C3/16
Inventor 杨希文吴政杰
Owner NATIONAL UNITED UNIVERSITY