Multichannel light detection apparatus

Abstract

The invention relates to a multichannel light detection apparatus. A voltage gain regulator is used for generating a voltage gain adjusting signal. A voltage gain controller is used for receiving the voltage gain adjusting signal and a first electrical signal transmitted by a temperature compensating module, superposing the two signals and outputting a voltage gain control signal to a bias power supply. The temperature compensating module is used for collecting operating temperatures of a plurality of light sensors in real time, converting the operating temperatures into the first electrical signal and feeding the first electrical signal back to the voltage gain controller. One bias power supply is used for receiving the voltage gain control signal and generating a bias voltage according to the size of the voltage gain control signal. The plurality of light sensors are used for receiving bias voltages so as to control sensitivities of the plurality of light sensors and are used for receiving optical signals, converting the optical signals into second electric signals and outputting. Therefore, one bias power supply can be used to provide the bias voltages needed by the plurality of light sensors and detection of multichannel light signals is realized.

Description

technical field [0001] The invention relates to the technical field of light detection, in particular to a multi-channel light detection device. Background technique [0002] In practical applications, signal detection often needs to detect multiple signals at the same time, which requires multiple signal detection channels at the same time. In optical signal detection, especially weak optical signal detection, in order to obtain a relatively high detection sensitivity, the photodiode as an optical sensor needs to work in a bias voltage mode, that is, a bias power supply is required to provide a bias voltage for the photodiode. Because the requirements for this type of bias power supply are relatively high and expensive, and the existing photodetectors are all single-channel light detection devices with a bias power supply corresponding to a photodiode sensor, so when there are multiple optical signal detection requirements Only a plurality of such single-channel light dete...

AI Technical Summary

Problems solved by technology

Because the requirements for this type of bias power supply are relatively high and expensive, and the existing photodetectors are all single-channel light detection devices with a bias power supply corresponding to a photodiode sensor, so when there are multiple optical signal detection requirements Only a plurality of such single-channel optical detection devices can be combined into a multi-channel optical detection device, which is inconvenient to use and very expensive

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