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Optical glass element with light absorption layer and preparation method of optical glass element

A technology of optical glass and light-absorbing layer, applied in optical components, glass manufacturing equipment, optics, etc., can solve problems such as high-temperature reduction process cannot meet, prepare light-absorbing layer, etc., reduce optical crosstalk, prevent interface reflection, reduce equipment the effect of the requirements

Inactive Publication Date: 2020-07-17
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide an optical glass element with a light-absorbing layer and its preparation method. The technical problem to be solved is that the existing high-temperature reduction process cannot meet the requirements for preparing a light-absorbing layer in optical glass with a dense structure.

Method used

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  • Optical glass element with light absorption layer and preparation method of optical glass element

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preparation example Construction

[0034] Such as figure 1 As shown, one embodiment of the present invention proposes a method for preparing an optical glass element with a light-absorbing layer, which specifically includes the following steps:

[0035] Step S1. Perform surface pretreatment on the optical glass to form nano-scale or micron-scale gas diffusion channels on the surface of the optical glass; this step does not specifically limit the method of surface pretreatment, in principle, as long as the surface of the optical glass can be formed into nano-scale or micron-scale gas diffusion channels can be selected, and the surface pretreatment includes but not limited to at least one of sandblasting, acid etching, ion exchange and quenching. When performing surface pretreatment on optical glass, one of the methods can be used, or multiple methods can be used in combination.

[0036] The sand blasting refers to hitting the glass surface with sand particles ejected at high speed from a spray gun, so that the ...

Embodiment 1

[0060] A method for preparing an optical glass element with a light-absorbing layer, specifically comprising the following steps:

[0061] (1) the K9 glass listed in Table 1 is processed to the blank size;

[0062] (2) Sandblasting the surface of K9 glass: choose 1000 mesh Al 2 o 3 Particles, sandblasting the glass surface for 60s under the pressure of 0.6MPa;

[0063] (3) Put the sandblasted K9 glass into the reduction furnace for high-temperature hydrogen reduction, the reduction temperature is 610°C, the hydrogen pressure is 0.2MPa, and the reduction time is 5000min;

[0064] (4) Process the reduced blank to the finished product size.

[0065] After testing, the light absorption efficiency of the light absorption layer is about 99.8%.

Embodiment 2

[0067] A method for preparing an optical glass element with a light-absorbing layer, specifically comprising the following steps:

[0068] (1) the K9 glass listed in Table 1 is processed to the blank size;

[0069] (2) Acid etching treatment for K9 glass: prepare 0.1mol / L nitric acid, heat to 60°C, immerse K9 glass in it for acid etching for 1 hour;

[0070] (3) Put the acid-etched K9 glass into a reduction furnace for high-temperature hydrogen reduction. The reduction temperature is 610° C., the hydrogen pressure is 0.2 MPa, and the reduction time is 5000 min.

[0071] (4) Process the reduced blank to the finished product size.

[0072] After testing, the light absorption efficiency of the light absorption layer is about 99.6%.

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Abstract

The invention relates to an optical glass element with a light absorption layer and a preparation method of the optical glass element, wherein the preparation method comprises the steps: pretreating optical glass to form a nano-scale or micron-scale gas diffusion channel on the surface of the optical glass; carrying out reduction treatment on the pretreated optical glass in a reducing atmosphere;and carrying out post-treatment on the optical glass subjected to reduction treatment to obtain the optical glass element with the light absorption layer. The optical glass element comprises an optical glass substrate and the light absorption layer, the light absorption layer is located on the periphery of the optical glass substrate, and the interface reflectivity between the light absorption layer and the optical glass substrate is smaller than 1%. The light absorption layer is a self-substrate light absorption layer, and the light absorption rate of the light absorption layer is greater than 99%. According to the preparation method, the problem that the light absorption layer is difficult to prepare in the optical glass with a compact structure is solved, and the problem that the lightabsorption layer falls off after being heated or subjected to external acting force does not exist.

Description

technical field [0001] The invention relates to the technical field of optical glass processing, in particular to an optical glass element with a light absorbing layer and a preparation method thereof. Background technique [0002] When optical glass is used in the optical system, in addition to receiving the target signal, it will also generate stray light due to boundary reflection, which affects the imaging accuracy of the optical system. For high-precision optical systems, measures must be taken to eliminate it. Therefore, it is necessary to take some necessary measures to reduce or eliminate the adverse effects of light interference, thereby improving the accuracy of optical instruments. [0003] The traditional stray light elimination technology is to coat the light absorbing layer on the edge of the optical glass device. Although the technology is simple, it also has certain disadvantages, for example: ① There is an interface between the coating layer and the optical...

Claims

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Application Information

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IPC IPC(8): C03C23/00C03C15/00C03C21/00C03B27/00G02B1/00
CPCC03B27/00C03C15/00C03C21/002C03C23/00G02B1/00
Inventor 孙勇贾金升吕学良李自金李开宇曹振博洪升李惠全石钰刘娟张洋孔壮那天一
Owner CHINA BUILDING MATERIALS ACAD
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