CCDを用いたMTF検査装置

抄録

The MRC-1 MTF TESTER in which charge coupled devices (CCD) are used as its photosensor was developed for production testing of facsimile lenses. Since a CCD is capable of selfscanning, the equipment does not require any large and precise mechanical scanning mechanisms giving MTF values for many field positions simultaneously. The MTFs at all 9 field positions for a single spatial frequency are given on the display panel. At the same time, green and red lights indicate whether a lens has passed or failed, having been compared with the acceptance level of MTF which was set by digital switches. The principle of the MRC-1 MTF TESTER is described and its features are discussed in this paper.