Based on the wide bandgap semiconductor SiC APD ultraviolet single photon detector

a 1×8 linear array photon counting readout circuit is proposed in this paper. According to the condition of the light intensity and through suitable timing control

the unitary fixed mode or complementary gating detection mode can be selected to implement the functions of sensing and counting for the wide dynamic range ultraviolet photon signals. The readout integrated circuit is fabricated by TSMC 0.18μm CMOS process

the test results show that the readout circuit is capable of single photon detection

and the performance is in agreement with the expected prediction by the simulation results. Finally

the two-dimensional turntable of the micro-motion system is utilized to complete the solar blind single-wavelength photon detection and imaging

so as to implement accurate discrimination and target localization on the multiple independent ultraviolet light sources.