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Optical glass with low refraction and chromatic dispersion

A technology of optical glass and low dispersion, applied in the field of new materials, can solve the problems of glass devitrification resistance and chemical stability are not good enough, and the liquidus temperature is high

Active Publication Date: 2011-01-12
HUBEI NEW HUAGUANG NEW INFORMATION MATERIALS CO LTD
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since GdF is not introduced in CN 1854100A 3 Composition, so that the liquidus temperature (Lt) of the glass is higher than that of this patent, resulting in insufficient devitrification resistance and chemical stability of the glass

Method used

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  • Optical glass with low refraction and chromatic dispersion
  • Optical glass with low refraction and chromatic dispersion

Examples

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Embodiment Construction

[0043] The content of each component in Table 1 is represented by weight percentage (Wt%).

[0044] Examples 1-9 in Table 1 are typical experiments for obtaining fluoride phosphate optical glass with a refractive index (nd) between 1.39-1.51 and an Abbe number (vd) between 74-99 according to the present invention. Comparative examples A, B, and C in Table 1 are examples of the prior art.

[0045] Table 1:

[0046]

[0047]

[0048] Note: 1. The chemical stability data in the table (D A 、DW ) is the result of testing according to the GB / T17129 standard using the powder method.

[0049] 2. Lt in the table is the liquidus temperature, and its test is carried out by DTA (differential thermal analysis) method. The temperature corresponding to the heat absorption peak with the highest temperature in the curve is Lt.

[0050] As can be seen from Examples 1 to 9: the present invention preferably uses P 2 o 5 The advantage of introducing phosphorus in the form of fluoride is...

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Abstract

The invention relates to optical glass with low refraction and chromatic dispersion, belonging to the technical field of new materials. The invention mainly provides phosphate fluoride optical glass capable of substituting a fluoride crystal material. The optical glass with low refraction and chromatic dispersion comprises phosphorus pentoxide and fluoride as main components and is characterized by being prepared from the following compounds in percentage by weight: 4-38 percent of P2O5, 5-32 percent of AlF3, 0.5-28 percent of BaF2, 0.5-30 percent of SrF2, 0.5-28 percent of CaF2, 0-12 percent of MgF2, 0.1-6 percent of SnF4, 0-20 percent of Na3AlF6, 0-12 percent of YF3, 0-12 percent of LaF3, 0-6 percent of GdF3, 0-20 percent of LiF and 0-8 percent of KF which are total 100 percent. The optical glass with low refraction and chromatic dispersion has the friction rate of 1.39-1.51, an Abbe number (vd) of 74-99, has the advantages of low conversion temperature and melting temperature, good stability and suitable production and is manly suitable for manufacturing lens and prisms of optical instruments which have high-accuracy chromatic aberration and are represented by cameras and projectors.

Description

technical field [0001] The invention belongs to the technical field of new materials. Specifically relates to a low refraction, low dispersion fluoride phosphate optical glass. technical background [0002] Fluorophosphorus glass is an optical material that combines the advantages of fluoride glass and phosphate glass. The most prominent feature is the tunability of optical properties brought about by its wide range of compositional tunability. It has ultra-low refractive index, ultra-low dispersion and high special relative partial dispersion value, and has superior achromatic performance, especially for long focal length apochromatic lenses, it is indispensable, so it has become the relevant optical design Indispensable component materials. In addition, it is also a good UV-transparent optical material, which can be used as a substitute for oxide glass and fluoride crystal. [0003] Glass materials with low refractive index and low dispersion have the characteristics of...

Claims

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Application Information

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IPC IPC(8): C03C3/247C03C4/00
Inventor 霍金龙张卫
Owner HUBEI NEW HUAGUANG NEW INFORMATION MATERIALS CO LTD
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