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Optical glass containing 68-85% of Bi2O3

An optical glass, B2O35 technology, applied in the field of optical glass, can solve the problem of high softening temperature

Inactive Publication Date: 2010-11-24
CHANGCHUN UNIV OF SCI & TECH
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Problems solved by technology

[0004] In order to overcome the deficiency of high softening temperature of the existing high refractive index optical glass, we invented a 2 o 3 High-quality optical glass not only has good thermal stability, chemical stability and high refractive index, but also has a softening temperature lower than 400°C. It is suitable for manufacturing optical parts such as spherical lenses, aspheric lenses, and prisms by precision pressing technology.

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  • Optical glass containing 68-85% of Bi2O3

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Embodiment Construction

[0012] The present invention contains 68-85% Bi 2 o 3 The composition and weight percentage of the optical glass are:

[0013] B 2 o 3 5~20%; Bi 2 o 3 68~85%; Sb 2 o 3 0.5-3%.

[0014] Introduce:

[0015] GeO 2 0~18%; 2 o 3 0~18%; La 2 o 3 0~10%; BaO 0~10%; SrO 0~10%; Nb 2 o 5 0-10%.

[0016] GeO 2 , Ga 2 o 3 Can improve the thermal stability and optical quality of the glass. GeO 2 , Ga 2 o 3 It is also a glass network generator, which can improve the crystallization performance of glass and increase the refractive index of optical glass, but its introduction also increases the cost of optical glass.

[0017] La 2 o 3 The introduction of can increase the refractive index of the glass, however, if the introduction amount exceeds 10%, it will lead to severe devitrification of the optical glass, preferably 2-7%.

[0018] BaO and SrO are introduced in the form of nitrate, which can strengthen the oxidizing atmosphere of the glass liquid and prevent...

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Abstract

The invention relates to an optical glass containing 68-85% of Bi2O3, belonging to the optical glass technical field. Although the refractive index of the existing high refractive index optical glass is more than 2.1, softening temperature is higher than 400 DEG C. The optical glass of the invention comprises the following components by weight percent: 5-20% of B2O3, 68-85% of Bi2O3 and 0.5-3% of Sb2O3. The refractive index nd of the optical glass of the invention is 2.1-2.35, and the softening temperature is lower than 400 DEG C. The invention is applicable to manufacturing minitype optical parts by adopting precision profiling technology.

Description

technical field [0001] The present invention relates to a kind of containing 68~85% Bi 2 o 3 High-quality optical glass has the characteristics of low softening temperature and high refractive index, which is suitable for precision pressing and makes the optical parts made small in size. It belongs to the technical field of optical glass. Background technique [0002] With the development of digital optical instruments, improving the imaging quality of optical instruments is an urgent problem to be solved. Generally speaking, the higher the refractive index of the optical lens material, the smaller the volume of the optical lens, and the more compact the optical instrument can be designed. For example, optical parts made of high refractive index optical glass are used in digital cameras and camera phones. While increasing the angle of view of the lens, the thickness of the body is reduced. In the coupling of laser and optical fiber, a lens with extremely short focal leng...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/14C03C3/15
Inventor 吕景文
Owner CHANGCHUN UNIV OF SCI & TECH