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Optical glass, glass perform thereof, optical element and optical instrument

A glass preform, optical glass technology, applied in optical components, optics, instruments, etc., can solve the problems of insignificant improvement effect and unsatisfactory optical crown glass hardness, and achieve high mechanical strength of glass, high resistance to punching, The effect of high hardness

Inactive Publication Date: 2019-09-13
CDGM OPTICAL GLASS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, in CN 108975687 A, namely SiO 2 In the system with increased content, under the premise of ensuring the refractive index and dispersion, although the weather resistance and chemical stability of the optical glass have been improved to a certain extent, the effect of the improvement is not obvious, and the hardness of the optical crown glass in the prior art not ideal

Method used

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  • Optical glass, glass perform thereof, optical element and optical instrument
  • Optical glass, glass perform thereof, optical element and optical instrument
  • Optical glass, glass perform thereof, optical element and optical instrument

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0081] An optical glass, the composition and performance of which are shown in Table 2-Table 4 in terms of wt%.

[0082] Table 2

[0083]

[0084]

[0085] table 3

[0086]

[0087]

[0088] Table 4

[0089]

[0090]

[0091] The optical elements formed by the optical glass of the present invention can be used to make optical instruments such as photographic equipment, imaging equipment, display equipment and monitoring equipment. By using the above-mentioned optical element with excellent performance on the optical instrument, the customer experience of the optical instrument can be improved. It should be noted that the features and advantages described above for the optical element are also applicable to the optical instrument, and will not be repeated here.

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Abstract

The invention discloses an optical glass, a preform thereof, an optical element and an optical instrument. The optical glass includes 40-60 wt% of SiO2, 1-15 wt% of B2O3, 0-20 wt% of Rn2O, 5-35 wt% ofRO and 0-8 wt% of ZnO; and Rn2O is one or more of Na2O, K2O and Li2O, and RO is one or more of CaO, BaO, SrO and MgO, wherein the value of ZnO / (B2O3+SiO2) is 0.17 or less, and the value of B2O3 / SiO2is 0.14 or less. The chemical elements are optically combined, so the ZnO content is still reduced after the SiO2 content is increased to 50 wt% or more; and the ratio of other elements is optimized to obtain high weatherability, high transmittance, high hardness, high chemical stability and light weight.

Description

technical field [0001] The invention relates to the field of glass, in particular to an optical glass and its prefabricated parts, components and instruments. Background technique [0002] From the perspective of optical properties, glasses with a refractive index of 1.54-1.62 and an Abbe number of 50-65 usually belong to the traditional crown glass, which is usually made of SiO 2 -B 2 o 3 -RO-Rn 2 The composition of the O component system, where RO refers to alkaline earth metal oxides, Rn 2 O refers to an alkali metal oxide. [0003] In the comparative document CN1450010A (2002), a kind of optical glass mainly based on silicic acid group is disclosed, and its SiO 2 The content of SiO is 36-66 mol%, and it can be known by the conversion of the examples of this comparative document: in this document, SiO 2 The content is 39.41-48.32wt%. This type of glass has excellent environmental resistance test ability, high transmittance, high expansion coefficient and Young's mod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/089C03C3/093G02B1/00
CPCC03C3/089C03C3/093G02B1/00
Inventor 孙伟
Owner CDGM OPTICAL GLASS
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