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Optical fiber panel cathode light window and preparation method thereof

An optical fiber panel and photocathode technology, which is applied in the field of glass surface treatment, can solve the problems of inability to meet the requirements of cathode sensitivity, difficult to achieve interface reflection, and narrow selection of photocathode substrate materials, so as to improve the photoelectron conversion efficiency and reduce the photon flux. Quantity loss, the effect of reducing the impact

Pending Publication Date: 2022-04-22
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As far as the combination of optical fiber panels and photocathode materials determined in the prior art is concerned, the adjustment of the glass material not only needs to comprehensively consider the matching of the thermal expansion coefficient of the glass, but also needs to consider avoiding the impact of the adjustment of the glass material on the entire optical system that has been finalized , resulting in a relatively narrow selection of photocathode substrate materials, so it is not easy to reduce the reflection of the interface by adjusting the refractive index of the glass material
[0005] With the combination of materials in the prior art and the current technological level, the quantum efficiency of the existing photocathode can only reach about 15%, and the average level of cathode sensitivity can only reach 600-700mA / lm, which cannot meet the requirements of the industry for cathodes. Sensitivity needs

Method used

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  • Optical fiber panel cathode light window and preparation method thereof
  • Optical fiber panel cathode light window and preparation method thereof
  • Optical fiber panel cathode light window and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] The optical fiber panel used in this embodiment is an array of light transmission and image transmission formed by regular arrangement of tens of millions, or even hundreds of millions of unit optical fibers, which are then melted and pressed. The fiber optic panel used in this embodiment has an outer diameter of 31 mm, a thickness of 5.6 mm, and both ends are flat. One side surface of the photocathode), the cross-section of the unit optical fiber is circular, and its silk diameter is 6 microns, and the cross-sectional ratio of the core layer and the cortex is 65 / 35. The cross-sectional ratio of the filament is 1.3%, the refractive index of the fiber core glass is 1.81, and the refractive index of the fiber skin glass is 1.51.

[0068] The outer surface of the fiber optic panel is coated with a second functional layer (double-layer anti-reflection coating), and the film adjacent to the fiber optic panel is Al 2 o 3 film, the other film away from the fiber optic panel ...

Embodiment 2

[0076] The fiber optic panel is the same as in Embodiment 1.

[0077] The micro-nano pits are formed by chemical etching, the etching solution is nitric acid solution, the pH value is preferably 3, the treatment time is 3 hours, and the treatment temperature is 50°C.

[0078] The second functional layer is the same as in Embodiment 1.

[0079] The first functional layer is a titanium dioxide layer, and the ion barrier layer is an aluminum oxide layer; the order of plating, the refractive index of the film layer, and the thickness of the film are shown in Table 2 below. The preparation method of the first functional layer and the ion barrier layer is atomic layer deposition technology.

[0080] Table 2

[0081] Layer order Membrane Refractive index nD Film thickness (nm) second functional layer -2 MgF 2

1.3849 83 second functional layer -1 Al 2 o 3

1.7643 30 Fiber optic panel 0 ---- ---- ---- ion barrier 1 al 2 ...

Embodiment 3

[0085] The fiber optic faceplate is the same as in Embodiment 1.

[0086] The micro-nano pits are formed by chemical etching. The corrosion solution is alkali solution, and KOH solution can be selected. The pH value is preferably 12.5. The processing time can be set according to the depth of the prepared pits. The processing temperature is 55°C and the processing time is 3 hours. .

[0087] The second functional layer is the same as in Embodiment 1.

[0088] The first functional layer is a titanium dioxide layer, and the ion barrier layer is an aluminum oxide layer; the order of plating, the refractive index of the film layer, and the thickness of the film are shown in Table 3 below. The preparation method of the first functional layer and the ion barrier layer is atomic layer deposition technology.

[0089] table 3

[0090] Layer order Membrane Refractive index nD Film thickness (nm) second functional layer -2 MgF 2

1.3849 83 second fun...

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Abstract

The invention relates to an optical fiber panel cathode light window and a preparation method thereof. The optical fiber panel cathode light window comprises an optical fiber panel and a photoelectric cathode, an ion barrier layer is arranged between the optical fiber panel and the photoelectric cathode, and the optical fiber panel cathode light window further comprises a first functional layer used for improving the photoelectron conversion efficiency of the photoelectric cathode; the first functional layer is arranged between the optical fiber panel and the photoelectric cathode; an ion barrier layer is arranged between the first functional layer and the optical fiber panel and / or between the first functional layer and the photoelectric cathode; the technical problem to be solved is how to improve the quantum efficiency of the photoelectric cathode, so that the cathode sensitivity of the photoelectric cathode is greater than or equal to 850 [mu] A / lm when the anode voltage is 6000V, the MCP voltage is 800V and the cathode voltage is 200V in a test light path with the color temperature of 2856K, and thus the photoelectric cathode is more practical.

Description

technical field [0001] The invention belongs to glass surface treatment technology, in particular to an optical fiber panel cathode light window and a preparation method thereof. Background technique [0002] Optical fiber panels are mainly composed of more than three types of optical glass. It is generally composed of a core glass with a high refractive index, a skin glass with a low refractive index, and a black glass that absorbs stray light. As the supporting material of the photocathode material (multi-alkali cathode, gallium arsenide, etc.) in the image intensifier, the fiber optic panel is also called the cathode window material. The photoelectron conversion efficiency of the cathode. [0003] The structure of the fiber optic panel cathodic light window includes the fiber optic panel and the Na 2 KS b 、Na 2 C s S b and C s S b composed of multi-alkali photocathodes. According to the difference in the refractive index of the above materials, the refractive in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J29/04H01J31/50H01J9/12
CPCH01J29/04H01J31/50H01J9/12
Inventor 黄永刚李开宇周游张洋吕学良贾金升
Owner CHINA BUILDING MATERIALS ACAD
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