Measuring research on the optical system's resolution with the radial target

Abstract

With the development of Charge Coupled Device (CCD) technology, the method to measure the optical system’s resolution with the machine sight has been applied widely, which can overcome the factor of subject error that will exist when adapting human being’s eyes to measure the resolution. With the radical target to measure the optical system’s resolution, it has many merits such as the measuring equipment is simple and the operation method is convenient. The measuring process is realized with a collimator and a CCD camera through adopting necessary image processing methods in the paper. The matching problem between the machine sight and the human being’s eyes when judging the optical system’s resolution is analysed firstly in the paper. And the critical contrast is got, which should be adopted when applying the machine sight to measuring the optical system’s resolution. Next step is to find where the resolution is nearest to the critical contrast in the target image. With the method present in the paper, we get it. So the resolution of the tested equipment can be figured out. Through contrastively analyzing the resolution data which is obtain with conventional method and with the method presented in the paper, it shows that the method to measuring the optical system’s resolution with radical target in the paper is viable completely.