Abstract
The imaging mechanism of a 3Dsingle-pixel camera based on compressed sensing was explored.A new 3Dsingle-pixel system based on a Field Programmable Gate Array(FPGA)and a FMC plane was design to replace the Avalanche Photo Diode(APD)single photon detector used in exiting 3Dsingle-pixel cameras to collect data and to improve the acquiring speed of imaging.This system was based on a FPGA from Xilinx and the FMC plane from a 4DSP's FMC126daughter card with highspeed photodetectors and could achieve high-speed optical signal acquisition.It could get the reflected light intensity information and the longitudinal distance information of a target object at the same time with a sampling rate of 5GS/s and a solution of 10bit.It used a pulse-sampling mode to minimize the size of data and the computing cost.Experimental results show that the system can get 20cm or more precise longitudinal resolution when a pulse laser(half-width is 800ps)is used as the light source,inwhich the acquisition time of every Digital Micro-mirror Device(DMD)pattern is depend on the longitudinal length of the target object.The system is also can be used in the laser 3Dimaging and pulse laser ranging.
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