| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an ophthalmologic photographing equipment with which adjustment with proper working distance and focus adjustment are performed by a spacial frequency analysis of an observation image so that a high-contrast image with high diagnostic value is obtained without complicating the structure. <P>SOLUTION: The image is divided into a central part image P1 and four peripheral area images P2-P5, condensed by each condensing circuit respectively and recorded as files with file sizes F1(D), F2(D), F3(D), F4(D) and F5(D) in a RAM based on the position D of a focus lens at the time of photographing. A CPU moves the focus lens in an optical axis to make the file size F1(D) of the central part image P1 larger and starts auto alignment control when the file sizes F2(D)-F5(D) of the other peripheral area images P2-P5 reach approximately 90% of the file size of the average image. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
