In hybrid optical power spectrum analysis systems, the wedge-ring array deteclor functions as an optical to electrical interface device for sampling the optical spatial frequency information for further processing by digit computer. The detector designed and fabricated in our laboratory consists of 32 semi-circular rings for detecting the radial information and with 32 wedge-shaped sections for the directional information in the spectrum. The detector is made on a silicon wafer diameter is about 32 mm with carefully controlled diffusion process in order to obtain uniformity in response and sensitivity. The average responsibility is about 0.5mA/mW for "the wedges and annular rings of ihe corresponding areas, the time constant is about 150 μθ. The spatial bandwid-fch could be up io 100 cycles with an optical transform lens of 240 mm fooal length irradiaied by ihe He-Ne radiation of 632.8 nm.