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A multi-purpose optical absolute value transmission system and its application method

A technology of transmission system and optical system, which can be applied in the field of photoelectricity-based measurement, can solve the problems of low test accuracy, high cost, and large instrument space, and achieve the effect of simplifying optical path design, reducing space, and improving accuracy

Active Publication Date: 2017-05-24
BEIJING HAMAMATSU PHOTON TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of light sensitivity, radiation or counting sensitivity and linear range that are tested separately by different test systems in the prior art, resulting in large space occupation of the instrument, low test accuracy and high cost, and to provide a multi-purpose light absolute quantity Value transfer system, to achieve a test system that can measure these indicators absolutely, and the test system design is simple and low cost

Method used

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  • A multi-purpose optical absolute value transmission system and its application method
  • A multi-purpose optical absolute value transmission system and its application method
  • A multi-purpose optical absolute value transmission system and its application method

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Embodiment 1 The optical absolute value transmission system of the present invention

[0023] like figure 1 As shown, the optical absolute value transmission system provided by the present invention includes a light source, a monochromator, a dimming system and a detection system, and the components are optically connected.

[0024] Different light sources need to be used when testing light sensitivity, radiation or counting sensitivity, and linear range. In order to ensure the consistency of the light source position when changing different light sources, a fixed bracket is provided at the light source. Use standard class A light source when testing light sensitivity; use standard light source, or deuterium light source, or xenon light source when testing radiation or counting sensitivity; use any light source when testing linear range, in order to improve test accuracy, it is preferred to use a monochromatic light source or a standard light source. Monochromatic ligh...

Embodiment 2

[0027] Embodiment 2 The test of light sensitivity

[0028] The specific operation steps include: first, use a standard class A light source to adjust the light intensity through a dimming system; then, use an illuminometer to measure the illuminance incident on the detector, denoted as w 1 , then the luminous flux s incident on the detector 1 is the effective illuminated area of ​​the detector under test; finally, replace the illuminometer with the detector under test to obtain the output signal i of the detector under test 1 , then the light sensitivity

[0029] Taking the photomultiplier tube as an example, the effective irradiated area is 1cm 2 , the illuminance measured with an illuminometer is 1*10 3 1m / m 2, the output current of the photomultiplier tube is 10μA, the light sensitivity of the photomultiplier tube is 100A / 1m.

Embodiment 3

[0030] Example 3 Testing of Radiation or Counting Sensitivity

[0031] The specific operation steps include: first, use a monochromator to sort out monochromatic light, adjust the dimming system to make the optical power of the incident light within the working range of the optical power meter, and measure the optical power density at this time, which is recorded as W 2 ; Then, adjust the dimming system to make the optical power of the incident light within the working range of the detector under test, and record the optical attenuation coefficient η at this time; finally, replace the optical power meter with the detector under test, and test the detector under test at this time. output signal of the device, denoted as i 2 , the radiation or counting sensitivity S 2 =i 2 / (w 2 ηs 2 ), where s 2 is the photosensitive area of ​​the detector.

[0032] With a maximum working power of 40pW and a photosensitive area of ​​1cm 2 The photon counting probe, the lower limit of the...

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Abstract

The invention relates to a light absolute magnitude transmission system which can measure a detector based on a photomultiplier. The system comprises a light source, a detection system and a light attenuation system arranged between the light source and the detection system. The light reducing system comprises a polaroid group and a light attenuation sheet group. The light absolute magnitude transmission system of the invention possesses a plurality of purposes and can carry out absolute measurement on indexes of illumination sensitivity, radiation or counting sensitivity and a linearity scope.

Description

technical field [0001] The invention relates to an optical absolute value transmission system, in particular to a [0002] The multiplier tube detector's light sensitivity, radiation or counting sensitivity, and linear range of multi-purpose light absolute value transfer system. Background technique [0003] For photomultiplier tube-based photodetectors, the most important performance indicators are illumination sensitivity, radiation or counting sensitivity, and linear range. Illumination sensitivity refers to the ratio of the detector’s output signal to luminous flux when illuminated by a light source with a color temperature of 2856K; radiation or counting sensitivity refers to the ratio of the detector’s output signal at a specific wavelength to the incident light power. For non-photon counting detection The detector is called radiation sensitivity, and it is called counting sensitivity for photon counting detectors; the linear range refers to the linearity of the outpu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M11/02
Inventor 郭维新杨庆坤李高峰李妙堂袁秀丽
Owner BEIJING HAMAMATSU PHOTON TECH INC