SELF-CALIBRATING SPECTRAL SENSOR MODULES

An example system includes a housing defining a cavity and an aperture, a photodetector disposed within the cavity, a voltage-tunable interferometer disposed within the cavity between the aperture and the photodetector, a first light source disposed within the cavity, and an electronic control device. The electronic control device is operable to vary an input voltage applied to the interferometer, and concurrently, cause the first light source to emit light towards the interferometer and measure light reflected from the interferometer using the photodetector. The electronic control device is also operable to determine a calibrated input voltage based on light reflected from the interferometer and measured by the photodetector. The electronic control device is also operable to apply the calibrated input voltage to the interferometer, and concurrently, obtain one or more spectral measurements using the photodetector. 示例系统包括限定腔和孔的外壳、设置在腔内的光电检测器、设置在孔和光电检测器之间的腔内的电压可调干涉仪、设置在腔内的第一光源和电子控制设备。电子控制设备可操作以改变施加到干涉仪的输入电压，并且