Optical glass

A technology of optical glass and optical components, applied in the field of germanium gallate optical glass, can solve the problems of low dispersion, low refraction of fluoride glass, crystallization performance, mechanical strength, chemical stability, poor process performance, etc., and achieve glass performance Good, high transmittance, low glass price effect

Active Publication Date: 2015-03-25
HUBEI NEW HUAGUANG NEW INFORMATION MATERIALS CO LTD
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Problems solved by technology

Both heavy metal oxide glass and fluoride glass have good transmission properties in the ultraviolet, near-infrared, and mid-infrared bands, but fluoride glass has low refraction and low dispersion, and its crystallization performance, mechanical strength, chemical stability, and process performance Other aspects are worse than heavy metal oxide glass

Method used

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Embodiment

[0026] Examples 1 to 12 in Table 1 are used to illustrate that the present invention obtains high refraction, high dispersion infrared germanium gallium acid with a refractive index (nd) between 1.94 and 1.96 and an Abbe number (υd) between 21 and 23 Typical experiments on salt optical glass. These examples are illustrative only, and the present invention is not limited to these examples.

[0027]Calculate, weigh and mix these raw materials according to the ratio provided in the following table 1, and put the batch material made into the smelting device (in view of the application requirements of the present invention, the smelting device needs to adopt a platinum crucible, a platinum stirrer, and a water removal device) , and then smelted at 1300°C to 1350°C by appropriate stirring, clarification, water removal, and cooling processes, and then poured or leaked into the forming mold. Finally, post-treatments such as annealing and processing, or compression molding by secondar...

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Abstract

The invention relates to optical glass, and provides infrared-transmitted germanium-gallate optical glass which is suitable for volume production and secondary profiling, and is high in refraction and high in dispersion. The glass contains GeO2, Ga2O3, BaO, ZrO2, TiO2 and PbO as necessary components, and does not contain thorium, cadmium or arsenic; the refractive index (nd) is 1.94-1.96; and the abbe number (upsilon d) is 21-23. The optical glass disclosed by the invention has good physical and chemical properties and infrared spectrum transmitting performance, and is mainly applied to infrared-transmitted windows and optical path lenses; the infrared cutoff wavelength is greater than 5.5 microns; and the ultraviolet cutoff wavelength is smaller than 400nm.

Description

technical field [0001] The invention relates to a high refraction, high dispersion infrared germanium gallate optical glass. Specifically, it relates to a germanium gallate with a refractive index (nd) between 1.94 and 1.96, an Abbe number (υd) between 21 and 23, and good transmission properties in the visible and mid-infrared spectral ranges. Optical glass. Background technique [0002] Commonly used transparent visible and mid-infrared band materials mainly include crystal, glass, etc., and the crystal material mainly includes MgF 2 , ZnS, spinel, sapphire and other crystals. Although these crystal materials have high infrared transmittance, they are difficult to process, especially spinel and sapphire. Due to their high hardness, grinding and polishing are even more difficult, resulting in high processing costs. , and it is not easy to obtain large-size component products. In addition, due to its single composition, the optical indicators (such as refractive index, dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/12
CPCC03C3/253
Inventor 赵仲勋张小东何蓉沈义梅胡向平
Owner HUBEI NEW HUAGUANG NEW INFORMATION MATERIALS CO LTD
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