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A photoelectric detector spectral response test system and a measurement method thereof

A photoelectric detector and spectral response technology, applied in the field of optical radiation calibration measurement instruments, can solve the problems of high cost of the test system and difficulty in ensuring measurement accuracy, so as to reduce equipment cost and design difficulty, avoid signal distortion, and improve measurement accuracy Effect

Inactive Publication Date: 2016-01-20
HUAZHONG UNIV OF SCI & TECH +1
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Problems solved by technology

[0005] The present invention provides a photodetector spectral response testing system and a measurement method thereof, which solves the problem that the existing testing system is expensive and difficult to ensure measurement accuracy, so as to realize high-precision measurement of spectral response

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  • A photoelectric detector spectral response test system and a measurement method thereof
  • A photoelectric detector spectral response test system and a measurement method thereof
  • A photoelectric detector spectral response test system and a measurement method thereof

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Embodiment Construction

[0047] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0048] Such as figure 1 As shown, the present invention includes a sinusoidal modulation light source 1, a condenser lens 2, a monochromator 3, a filter wheel 4, a dark box 12, a motor drive circuit 13, a microcontroller control circuit 14, a preamplifier circuit 15, a data acquisition card 17 and computer 18;

[0049] Described obscura 12 is equipped with collimating optical system 5, spectroscope 6, first motorized turntable 10 and second motorized turntable 11, and standard Si photodetector 7 is installed on the first motorized turntable 10, on the second motorized turntable 11 mounted with a reference Si photodetector 9;

[0050] The light emitted by the sinusoidal modulation light source 1 passes through the condenser lens 2, enters the monochromator 3 for light splitting, filters out the high-order spectrum through the filter wheel 4, and output...

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Abstract

A photoelectric detector spectral response test system and a measurement method thereof belong to optical radiation calibration measuring instruments and methods, and solves problems of expensive cost and difficulty in guaranteeing measurement precision of existing test systems to realize high precision measurement of spectral response. The test system of the present invention comprises a sinusoidal modulation light source, a condensing lens, a monochromator, an optical filter wheel, a camera obscura, a motor-drive circuit, a microcontroller control circuit, a preamplifier circuit, a sine phase lock amplification circuit, a data collection card and a computer. The sinusoidal modulation light source is a sine-modulated incandescent lamp, a halogen tungsten lamp and an LED light source. According to the invention, a programmable device is employed to realize a mode of sine phase lock amplification, and photoelectric detector spectral responses in a scope of 300-900nm is measure and drawn. While high-precision measurement is realized, the equipment cost and design difficulty are also reduced.

Description

technical field [0001] The invention belongs to an optical radiation calibration measuring instrument and method, in particular to a photodetector spectral response testing system and a measuring method thereof. Background technique [0002] Spectral response is the main performance parameter of photodetectors. Testing this parameter is of great significance to the actual photoelectric system design and the improvement and improvement of the photodetector device manufacturing process. [0003] The Chinese invention patent with publication (announcement) No. CN102305905A provides a wide-spectrum photoelectric test system, which uses a stable wide-spectrum light source to measure spectral responsivity. It is difficult to eliminate the background noise of the detector and the random noise of the circuit, which will lead to measurement errors. In order to improve the measurement accuracy, a method of coherent detection is proposed. The method of modulating the light source (cho...

Claims

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Application Information

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IPC IPC(8): G01J3/28G01J3/10
Inventor 赵茗汪少锋杨振宇
Owner HUAZHONG UNIV OF SCI & TECH