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Method for calibrating absolute spectral response ratio of photoelectric detector

A technology of photodetector and calibration method, which is applied in the field of calibration of absolute spectral responsivity, can solve problems such as weak power and large calibration uncertainty, and achieve the effect of wide applicability

Inactive Publication Date: 2012-03-21
NORTHWEST INST OF NUCLEAR TECH
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a calibration method for the absolute spectral responsivity of a photodetector, which solves the problem of large calibration uncertainty caused by the power of the wide-spectrum light source being too weak after splitting in the existing absolute calibration method

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  • Method for calibrating absolute spectral response ratio of photoelectric detector
  • Method for calibrating absolute spectral response ratio of photoelectric detector
  • Method for calibrating absolute spectral response ratio of photoelectric detector

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Embodiment Construction

[0027] In order to overcome the problem in the existing absolute calibration method that the power of the wide-spectrum light source is too weak after the spectrum is too weak, the idea adopted in the present invention is to use the broad-spectrum light source spectroscopic method to measure the photodetector in a certain spectral band. The relative response coefficient within the spectrum, and the absolute responsivity of the photodetector is obtained by measuring the laser source with stable output in this band, and then the absolute responsivity value of the entire spectral band is obtained according to the previous relative response coefficient, so as to obtain the detector in the The absolute responsivity value for this operating wavelength.

[0028] The specific steps of the wavelength substitution calibration method of the present invention are as follows:

[0029] 1. Use a wide-spectrum light source to split light according to the spectrum and then incident on the phot...

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Abstract

The invention discloses a method for calibrating the absolute spectral response ratio of a photoelectric detector, which comprises the steps of: measuring a relative response coefficient of the photoelectric detector within a certain spectral wave band by a wide-spectrum light source divisionism, measuring a laser source which is stably output within the wave band to obtain the absolute response ratio of the photoelectric detector, obtaining an absolute response ratio value within the whole spectral wave band according to the measured relative response coefficient, and obtaining the absolute response ratio value of working wavelength of the detector. The problem that the existing absolute calibrating method is weak in power after the wide-spectrum light source divisionism is used can be solved, the calibrating uncertainty can be reduced, and the method can be used for ultraviolet wave band, visible light wave band and infrared wave band.

Description

technical field [0001] The invention relates to a calibration method for the responsivity parameter of a photoelectric detector, in particular to a calibration method for realizing the absolute spectral responsivity by utilizing the spectral response characteristic of the detector. Background technique [0002] A photodetector is a sensor that converts optical signals into electrical signals. It is different from traditional thermal detectors. It is widely used in the field of optical measurement because of its fast response time and high sensitivity. Because of its wavelength selectivity, that is, The responsivity varies with the detected spectrum, so the precise measurement of its absolute spectral responsivity, that is, the absolute responsivity parameter at a specific wavelength, has become a technical problem. [0003] The absolute spectral responsivity of the photodetector, R λ Refers to the signal S generated by the detector and the incident optical power P of the wa...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D18/00
Inventor 陈绍武王平宇文璀蕾冯国斌闫燕冯刚马志亮张磊
Owner NORTHWEST INST OF NUCLEAR TECH
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