Broadband-spectrum optical glass and method of producing the same

Abstract

The invention relates to broad-spectrum optical glass and a preparation method thereof, which is characterized in that: (1) the glass comprises the following components in percentage by mol: 20 to 33 percent of Ga2S3, 5 to 40 percent of GeS2, 38 to 67 percent of CsX, and 2 to 5 percent of YS2; the preparation method comprises the following steps: mixing elementary substances such as Ga, Ge and S and compounds such as CsX and YS2 to obtain a mixture, and putting 0.01 weight percent of magnesium ribbon as deoxidizer into the mixture, wherein X is Cl or I or Br; and Y is Ti or Zr or Hf; (2) filling the mixture into one quartz tube in an H-shaped double-tube quartz ampoule subjected to dehydroxylation pretreatment, vacuumizing the quartz tube, and sealing the quartz ampoule by hydrogen flame when the pressure is less than or equal to 1*10<-3>Pa; (3) putting the sealed quartz ampoule filled with the mixture into a double-tube distilling furnace, distilling and purifying the mixture to obtain extract of Ge, Ga and S in the other quartz tube of the H-shaped double-tube quartz ampoule; and (4) putting the purified quartz ampoule into a rocking furnace, slowly heating the quartz ampoule to between 800 and 950 DEG C, smelting the mixture for 8 to 12 hours by rocking, then taking out and cooling the mixture, preserving heat at a temperature of between 150 and 330 DEG C, and then carrying out related annealing treatment to obtain a broad-spectrum optical glass product.

Description

technical field [0001] The invention relates to an optical glass, in particular to a wide-spectrum optical glass and a preparation method thereof. Background technique [0002] The three bands with the largest light transmittance (minimum reflection and absorption) of the atmosphere: the visible band, 3-5 microns and 8-12 microns, which are customarily called the three windows of the atmosphere. Infrared devices for long-distance detection or transmission must work in the atmospheric window band. However, most of the materials that have light transmission properties in the infrared window, especially in the 8-14 μm band, often do not transmit in the visible band. This makes it difficult to apply commonly used visible light detection methods, and most of the optical instruments working in the infrared band and the optical equipment working in the visible light band are separated, that is, they each have a complete and independent working system, so that the infrared system a...

AI Technical Summary

Problems solved by technology

However, there are few patents and documents on wide-spectrum optical glass materials. Among them, the domestic patent CN200610024707 is a chalcogenide glass material based on Ga, Ge, Se, and CsI systems for all-light windows, although its infrared wavelength transmission can reach 14 μm , but its cut-off wavelength in the visible band is greater than 0.55 μm, and it cannot truly achieve full-band high-transparency in the visible band, which will cause a large number of short-wave information in imaging and affect the imaging quality.

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