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Method for detecting subsurface defects of optical glass

A subsurface defect, optical glass technology, applied in the direction of optical testing flaws/defects, etc., can solve the problems of complex operation, high cost, special requirements for sample morphology, etc., and achieve simple experimental steps, low cost, and fast detection speed. Effect

Active Publication Date: 2015-05-13
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing non-destructive testing methods have problems such as special requirements on the shape of the sample, high cost, and complicated operation.

Method used

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  • Method for detecting subsurface defects of optical glass
  • Method for detecting subsurface defects of optical glass
  • Method for detecting subsurface defects of optical glass

Examples

Experimental program
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Effect test

Embodiment 1

[0036] The implementation steps of the inventive method are as follows:

[0037] 1) Evenly mix glycerol and deionized water with a volume ratio of 1:4 to form a mixed solution.

[0038] 2) Add rhodamine 6G to the mixture of glycerol and water to obtain a buffer solution. The concentration of rhodamine 6G in the buffer is 1 × 10 -3 moL.

[0039] 3) Take 100ml of the prepared buffer solution, add 10g of granular abrasives to obtain an abrasive, set the rotation speed of the grinding disc at 50r / min, and use this abrasive to grind N3135 neodymium-doped phosphate laser glass for 30s;

[0040] 4) Take 100ml of the prepared buffer solution, add 1g of polishing powder to obtain a polishing solution, set the rotation speed of the grinding disc at 220r / min, and use the polishing solution to polish N3135 neodymium-doped phosphate glass for 10 minutes.

[0041] 5) Clean the polished N3135 neodymium-doped phosphate glass with ultrasonic alcohol for 5 minutes, and wipe the sample dry wi...

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Abstract

The invention provides a method for detecting the subsurface defects of optical glass. The method comprises the following steps of: (1) evenly mixing an auxiliary solvent with water in a ratio of 20%-50%, thereby forming a mixed liquid; (2) adding a fluorescein to the mixed liquid to obtain a buffer solution, wherein the concentration of the fluorescein in the mixed liquid ranges from 1*10<-5> mol / L to 5*10<-3> mol / L; (3) adding the buffer solution to a grinding material as a grinding agent, and grinding the optical glass by using the grinding agent; (4) adding the buffer solution to polishing powder as a polishing liquid and polishing the optical glass by using the polishing liquid; and (5) cleaning the polished optical glass by using ultrasonic wave and alcohol; and observing the polished optical glass through a fluorescent microscope under irradiation of 355 nm monochromatic light. The method carrying out undamaged detection on the subsurface defects of the optical glass has the characteristics of display, positioning, no damage and markup.

Description

technical field [0001] The present invention relates to optical processing, in particular to a method for detecting subsurface defects of optical glass, in particular to a method for nondestructive detection of subsurface defects generated during the optical processing of optical glass, which is suitable for studying the distribution and distribution of subsurface defects. Morphological features. Background technique [0002] Driven by the demand for laser nuclear fusion, China, the United States, Russia and other countries have successively established multiple large-scale laser drive devices. Taking my country as an example, the Shenguang III laser device requires a large number of high-precision, large-aperture optical components, including neodymium-doped phosphate laser glass. Flat glass, KDP crystal, fused silica, etc. These devices feature high-precision topography, ultra-smooth surfaces, large apertures, and high-volume quantities for high-power laser applications....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/91
Inventor 王威冯素雅陈伟胡丽丽
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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