Device and method for calibrating response characteristic parameters of infrared photodetector under dim light conditions

An electrical detector and response characteristic technology, which is applied in the field of infrared photodetector response characteristic parameter calibration devices under weak light conditions, can solve problems such as inability to effectively eliminate environmental interference, and achieve the effects of avoiding interference and improving calibration accuracy.

Pending Publication Date: 2017-05-31
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0003] In order to solve the technical problem that the existing infrared photodetector calibration device cannot effectively eliminate environmental interference under weak light conditions, the present invention provides an infrared photodetector response characteristic parameter calibration device and method under low light conditions

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  • Device and method for calibrating response characteristic parameters of infrared photodetector under dim light conditions
  • Device and method for calibrating response characteristic parameters of infrared photodetector under dim light conditions
  • Device and method for calibrating response characteristic parameters of infrared photodetector under dim light conditions

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Embodiment Construction

[0027] See figure 1 The present invention provides a calibration device for infrared photodetector response characteristic parameters under low light conditions. The structure of a preferred embodiment includes a calibration light source 1, an optical chopper 2, a collimator 4, and a lock-in amplifier 7. The optical chopper 2 is located between the entrance of the calibration light source 1 and the collimator 4, locked in amplifying, and 7 is respectively connected to the optical chopper 2 and the infrared photodetector 6 to be tested. The target of the infrared photodetector 6 to be tested The surface is located at the exit of the collimator tube 4.

[0028] Preferably, in this embodiment, a black body is used as the calibration light source, and a star point plate is installed at the entrance of the collimator. The receiving power of the target surface of the infrared photodetector can be changed by changing the diameter of the star point plate and changing the black body temp...

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Abstract

The invention belongs to the field of infrared photodetection and relates to a device and a method for calibrating response characteristic parameters of an infrared photodetector under dim light conditions. The device comprises a calibration light source, an optical chopper, a collimator and a phase-locked amplifier, wherein the optical chopper is located between the calibration light source and an entrance of the collimator; the phase-locked amplifier is separately connected with the optical chopper and an infrared photodetector to be detected; a target surface of the infrared photodetector to be detected is located at an exit of the collimator. According to the device and the method, the optical chopper is used for modulating black body emitting light signals, and the phase-locked amplifier is used for extracting the modulated black body emitting light signals, so that the interference to light source signals caused by environmental radiation signals is effectively avoided.

Description

Technical field [0001] The invention belongs to the field of infrared photoelectric detection, and relates to a device and method for calibrating infrared photodetector response characteristic parameters under weak light conditions. Background technique [0002] The infrared photodetector is a photoelectric conversion device that converts the incident infrared radiation signal into an electrical signal for output. Infrared radiation is ubiquitous in the environment. Any object above absolute zero (-273°C) radiates infrared energy. Infrared photodetectors are special devices used to measure this infrared radiation. The response characteristics of infrared photodetectors directly determine the accuracy of infrared radiation measurement. In practical applications, it is necessary to calibrate a series of parameters of the infrared photodetector used in order to grasp the response characteristics of the infrared photodetector. This type of calibration process is mainly to continuou...

Claims

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Application Information

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IPC IPC(8): G01J5/52
CPCG01J5/52G01J5/80
Inventor 郭毅刘峰赵建科徐亮刘锴李朝辉高明星李晓辉
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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