Measuring method of mid-infrared light signal intensity in wide temperature environment
A technology of signal strength and measurement method, which is applied in the direction of using electric radiation detectors for photometry, etc., can solve the problems of measurement uncertainty, small amplitude of measurement output signal, insufficient dynamic range, etc., to achieve simple steps and improve output signal. Amplitude, easy to calculate effect
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[0039] The measuring device of the mid-infrared optical signal intensity that the present invention adopts comprises mid-infrared photoconductive detector 3, driving circuit and signal acquisition recorder; Driving circuit is as figure 1 As shown, it includes an instrumentation amplifier unit and a constant current source unit. The constant current source unit is composed of a measuring arm and a trimming arm. The measuring arm includes a constant current source 2 and a mid-infrared photoconductive detector 3. The positive terminal of the constant current source is connected to the bias voltage Source 1, the negative end is connected with one end of the detector 3 and the inverting input end of the instrumentation amplifier 6 at the same time, the other end of the detector 3 is grounded; the trim arm includes a bias resistor 4 and a trim resistor 5, and one end of the bias resistor 4 is connected to the bias Set the voltage source 1, and the other end is connected with one end ...
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