摘要
According to the requirements, an active infrared system is designed, which is composed of the emitting and receiving parts. The emitting part consists of a GaAs semiconductor laser device and binoculars optical system. A Si photodiode is selected as the receiving device, and a preamplifier circuit is designed to match the detector and further improve the signal to noise ratio. The laser encoding mode is utilized to enhance the anti disturbance. The theoretical analysis of this system is presented and a system prototype is made according to the requirement. The experimental results agree well with the theoretical prediction.
According to the requirements, and active infrared system isdesigned, which is composed of the emitting and receiving parts. Theemitting part consists of a GaAs semiconductor laser device andbinoculars optical system. a Si photodiode is selected as thereceiving device, and a preamplifier circuit is designed to match thedetector and further improve the signal to noise ratio. thelaser-encoding mode is utilized to enhance the anti- disturbance. Thetheoretical analysis of this system is presented and a systemprototype is made according to the requirement. The experimentalresults agree well with the theoretical prediction.
