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Optical coupling method of photoelectric detector

A photodetector and optical coupling technology, which is applied in the coupling of optical waveguides, etc., can solve problems such as space pollution, affecting the reliability of peripheral electrical devices, and cracking and failure of glass optical windows, so as to improve anti-vibration and ensure photoelectric conversion efficiency , The effect of safe landing performance

Inactive Publication Date: 2015-05-20
NANJING SANLE PHOTOELECTRONICS TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the silicone oil gradually volatilizes, the two glass surfaces are directly squeezed, and in the environment of severe vibration and impact, it will cause the glass light window to burst and fail.
And the volatilized and diffused silicone oil will cause local space pollution and affect the reliability of surrounding electrical devices

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A kind of optical coupling method of photodetector, it comprises the following steps:

[0042] (1) Mix the silicone rubber and the curing agent according to the weight ratio of 10:1, shake it fully to make it evenly distributed, and obtain the mixture of silicone rubber and curing agent, and set aside;

[0043] (2) Place the mixed solution of silicone rubber and curing agent prepared in step (1) in a vacuum container for vacuum treatment, so that the vacuum degree is reduced from normal atmospheric pressure to 10 -3 Pa, extract the air in the mixed solution, then in order to prevent the mixed solution from flowing, the vacuumed mixed solution was left to stand for 120 minutes to obtain a mixed glue with certain viscosity and fluidity;

[0044] (3) Pour 2 ml of the mixed glue solution prepared in step (2) on the light window surface of the pre-cleaned photomultiplier tube at a constant speed, so that the mixed glue solution flows naturally and covers the entire light win...

Embodiment 2

[0049] A kind of optical coupling method of photodetector, it comprises the following steps:

[0050] (1) Mix the silicone rubber and the curing agent according to the weight ratio of 8:1, shake it fully to make it evenly distributed, and obtain the mixture of silicone rubber and curing agent, and set it aside;

[0051] (2) Place the mixed solution of silicone rubber and curing agent prepared in step (1) in a vacuum container for vacuum treatment, so that the vacuum degree is reduced from normal atmospheric pressure to 10 -3 Pa, extract the air in the mixed solution, then in order to prevent the mixed solution from flowing, the vacuumed mixed solution was left to stand for 130 minutes to obtain a mixed glue with certain viscosity and fluidity;

[0052] (3) Pour 3 ml of the mixed glue solution prepared in step (2) on the light window surface of the pre-cleaned photomultiplier tube at a constant speed, so that the mixed glue solution flows naturally and covers the entire light w...

Embodiment 3

[0057] Select the photodetectors obtained by the coupling of Embodiment 1 and Embodiment 2 of the present invention for performance testing, and the test results show that the photodetectors obtained by coupling are firmly bonded, have no vacuum mass loss rate, and have no volatile nuclear diffusion problem; the light transmittance They are 93% and 94% respectively, which can ensure the photoelectric conversion efficiency, improve the sensitivity of detecting the flying height of the aircraft and the reliability of safe landing.

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Abstract

The invention discloses an optical coupling method of a photoelectric detector. According to the method, coupling agents of NaI crystals and photomultipliers are screened through a large number of experiments, then a method for coupling the NaI crystals and the photomultipliers is obtained through a large number of experiments in a screening mode, and the coupled NaI crystals and the photomultipliers are assembled to form the photoelectric detector in the optimized technological method. By means of the method, the volatilization and diffusion problem of optical coupling materials in a low-pressure environment in the prior art can be solved, light rays are prevented from being reflected and affecting the photoelectric conversion efficiency, flexibility of detecting the flight height of an air vehicle is guaranteed, and reliability of safe landing is guaranteed. The obtained photoelectric detector is high in quality, superior in performance, good in stability, strong in practicability, and capable of being widely applied to Chinese space crafts and moon landing detectors.

Description

technical field [0001] The invention designs a preparation method of a photodetector, and in particular relates to an optical coupling method of a photodetector. Background technique [0002] At present, the optical coupling glue used for photodetectors is vacuum silicone oil, which is used to couple the NaI crystal with the glass window of the photomultiplier tube to form a light transmission channel. This coupling method has been used for many years. [0003] Vacuum silicone oil has lubricating and sealing functions. It is composed of inorganic thickener, synthetic oil, viscosity regulator and other substances. It is refined by distillation and degassing in high vacuum. It has a wide temperature range, low saturated vapor pressure, Excellent thermal stability, chemical stability, low volatilization loss, the operating temperature range is -50 ° C ~ 200 ° C, because it has the above-mentioned good operating characteristics, it has been used to couple NaI crystals and photoe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/42
Inventor 王浩东方莉江秋玲吴勇强
Owner NANJING SANLE PHOTOELECTRONICS TECH
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