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Anti-halation glass assembly with ultrahigh cathode sensitivity as well as preparation method and application of anti-halation glass assembly

A sensitivity and glass technology, applied in the field of anti-halation glass components and its preparation, to achieve the effect of improving cathode sensitivity, environmental protection cost, and high optical transmittance

Active Publication Date: 2021-08-10
NORTH NIGHT VISION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, limited by the existing technology level, it is difficult to directly prepare a complete diffraction grating on the traditional anti-halation glass without affecting the subsequent preparation of the photocathode.

Method used

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  • Anti-halation glass assembly with ultrahigh cathode sensitivity as well as preparation method and application of anti-halation glass assembly
  • Anti-halation glass assembly with ultrahigh cathode sensitivity as well as preparation method and application of anti-halation glass assembly
  • Anti-halation glass assembly with ultrahigh cathode sensitivity as well as preparation method and application of anti-halation glass assembly

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preparation example Construction

[0042] The present invention also provides a method for preparing an anti-halation glass assembly with ultra-high cathode sensitivity, comprising the following steps:

[0043] S1 Prepare the above-mentioned anti-halation step substrate glass 1 and the second thin glass sheet 2 through the prior art;

[0044] S2 Prepare the first thin glass sheet 3, and then thermally bond the anti-halation step substrate glass 1 and the second thin glass sheet 2 (in a vacuum heating furnace, the bonding temperature is controlled at 600-650°C between) connected as one.

[0045] The preparation method of the first thin glass sheet 3 comprises the following steps:

[0046] 1) Weigh SiO according to mole percentage (mol%) 2 , 55-65%; B 2 o 3 , 20-25%; Na 2 O, 3-5%; K 2 O, 1-2%; Al 2 o 3 , 3-4%; LiF, 3-5%; ZnO, 1-6%, mixed evenly to obtain batch materials;

[0047] 2) At 1400-1480°C, add the batch material to the crucible for melting for several times, and the interval between each additio...

Embodiment 1

[0054] This embodiment provides an anti-halation glass assembly with ultra-high cathode sensitivity, the anti-halation glass assembly is composed of anti-halation stepped substrate glass 1 (with opposite small faces and large faces, the small The surface diameter is 21mm), the first thin glass sheet 3 and the second thin glass sheet 2, the surface of the second thin glass sheet 2 is provided with a micro-nano array structure. The anti-halation step substrate glass 1 and the second thin glass sheet 2 are selected from the prior art, which are the same high borosilicate glass, and the transition temperature T of the high borosilicate glass is g 550℃, softening point temperature T f 658°C, the coefficient of thermal expansion at 20°C-300°C is 52×10 -7 / °C, the optical refractive index is 1.490; the material of the first thin glass sheet 3 is SiO 2 -B 2 o 3 -ZnO glass, the SiO 2 -B 2 o 3 -The softening point temperature T of ZnO glass f is 600°C; the SiO 2 -B 2 o 3 -T...

Embodiment 2

[0069] This embodiment provides an anti-halation glass assembly with ultra-high cathode sensitivity, the anti-halation glass assembly is composed of anti-halation stepped substrate glass 1 (with opposite small faces and large faces, the small The diameter of the surface is 22mm), the first thin glass sheet 3 and the second thin glass sheet 2, and the surface of the second thin glass sheet 2 is provided with a micro-nano array structure. The anti-halation step substrate glass 1 and the second thin glass sheet 2 are selected from the prior art, which are the same high borosilicate glass, and the transition temperature T of the high borosilicate glass is g 560℃, softening point temperature T f 650°C, the coefficient of thermal expansion at 20°C-300°C is 54×10 -7 / °C, the optical refractive index is 1.500; the material of the first thin glass sheet 3 is SiO 2 -B 2 o 3 -ZnO glass, the SiO 2 -B 2 o 3 -The softening point temperature T of ZnO glass f is 592°C; the SiO 2 -B...

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Abstract

The invention relates to an anti-halation glass assembly with ultrahigh cathode sensitivity and a preparation method and application of theanti-halation glass assembly. The anti-halation glass assembly is composed of anti-halation step substrate glass, a first thin glass sheet and a second thin glass sheet which are connected in sequence, and the surface of the second thin glass sheet is provided with a micro-nano array structure. According to the anti-halation glass assembly, the high optical transmission performance and other basic performance of traditional anti-halation glass are kept, meanwhile, the sensitivity performance of the cathode is greatly improved, and the anti-halation glass assembly is more suitable for practical application.

Description

technical field [0001] The invention relates to an optical glass component, in particular to an anti-halation glass component with ultrahigh cathode sensitivity and its preparation method and application. Background technique [0002] As a kind of special optical material, anti-halation glass is usually used in the low-light night vision field. The traditional anti-halation glass input window is made into a stepped glass 1a with different diameters on both sides in the low-light image intensifier ( figure 1 ), the middle is transparent glass, and the periphery is wrapped with a layer of black opaque glass. The surface of the small surface is coated with a photocathode, and the edge of the large surface is sealed with indium of the image intensifier tube. The most important technical index to measure the anti-halation glass is the average cathode sensitivity, that is, the quantum efficiency of photons converted into electrons through the anti-halation glass through the photoc...

Claims

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Application Information

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IPC IPC(8): H01J1/34H01J1/92H01J9/12H01J9/18H01J31/50C03C3/118C03C27/06B82Y20/00B82Y40/00
CPCH01J1/34H01J1/92H01J31/50H01J9/12H01J9/18C03C27/06C03C3/118B82Y20/00B82Y40/00
Inventor 曹振博贾金升郑京明刘辉吕学良李开宇李自金孙勇
Owner NORTH NIGHT VISION TECH
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