an optical glass

A technology of optical glass and ratio meter, applied in the field of optical materials, can solve problems such as loss of high-quality optical glass

Active Publication Date: 2020-10-30
望江县天长光学仪器有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, ZnO is an important component for forming low-melting optical glass, and abandoning the use of ZnO is also a loss for obtaining high-quality optical glass.

Method used

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Effect test

Embodiment

[0033] The optical glass of the present invention can be produced in the following manner: uniformly mix the above-mentioned raw materials so that each component is within a specified content range, put the mixture into a platinum crucible, and heat the glass at a temperature of 1250-1500 ° C according to the melting difficulty of the glass composition. It is melted within the temperature range for 2-5 hours, stirred and homogenized, then lowered to an appropriate temperature, and finally cast into a mold and cooled slowly.

[0034] The optical glasses (Examples 1-18) shown in Table 1-2 were obtained by weighing according to the ratios of the respective examples shown in Table 1-2.

[0035] The results of composition, refractive index (nd), Abbe's number (vd), and glass transition temperature (Tg) of Example 1 of the present invention are shown in Table 1-2 together, refractive index nd, Abbe's number υd: according to GB / T7962.1-2010 standard test method is used for measureme...

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Abstract

The invention discloses optical glass. The optical glass is prepared from the following components in weight by percentage: 20 to 40% of SiO2, 1 to 10% of B2O3, 15 to 35% of La3O2, 5 to 15% of Bi2O3,1 to 8% of TiO2, 5 to 20% of ZrO2, 1 to 10% of Ta2O5, 2 to 15% of Gd2O3, 1 to 10% of Y2O3, 1 to 12% of Na2O, 1 to 12% of Li2O, wherein the Bi2O3 is Bi2O3 doped with Zn<2+>. The optical glass providedby the present invention avoids the use of ZnO which is highly errosive to a smelting apparatus by doping Bi2O3 with Zn<2+>, while at the same time retaining the contribution of ZnO to obtaining highquality optical glass.

Description

technical field [0001] The invention relates to the technical field of optical materials, in particular to an optical glass. Background technique [0002] Optical glass is a glass material used to manufacture lenses, prisms, mirrors and windows in optical instruments or mechanical systems. Optical glass has good light transmission performance and high refractive index, and is widely used in the manufacture of optical instruments such as spectacle lenses, cameras, telescopes, microscopes and lenses. With the advancement of science and technology and the upgrading of digital products, the demand for optical glass is also increasing, and higher requirements are placed on the performance of optical glass. [0003] Chinese patent application CN1772671A discloses an optical glass with a refractive index of 1.65-1.74 and an Abbe number of 36-45. Its components contain 8-30% by weight of ZnO and 5-26% by weight of BaO. Due to the high content of ZnO and BaO, during the melting pr...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C03C3/068C03C4/00C03C1/02
CPCC03C1/02C03C1/026C03C3/068
Inventor欧阳胜明
Owner望江县天长光学仪器有限公司