An Optical Synthetic Aperture Radar Prccessor(OSARP)is different from the conventional imaging system. It warks after Synthetic Aperture Radar(SAR)and processes image from SAR data film. Thus we inspect not only the imaging quality of the OSARP

but also the function of it. In this paper we provide a method of inspection of an OSARP. The function of the OSARP is obtained through testing the adjustable quantities of each assembly of the OSARP. The imaging quality of the OSARP is inspected with the general testing targets and a shift lens. We use simulated SAR data films to demonstrate the capability of the OSARP to handle radar phase histories. Finaly the true SAR data film is processed to show the comprehensive imaging quality of the SAR and the OSARP. We inspect the OSARP made in Changchun Institute of Osptics and Fine Mechanics

Academia Sinica with this method. The experimental results show that the method is practical.