发明名称 |
Focus detector system with a distortion compensation mask |
摘要 |
A focus detection system includes an object lens for focusing an image of an object, a refocusing optical system for refocusing a plurality of component image having parallax from the image of the image, a view field mask arranged between the object lens and the refocusing optical system and having a laterally extending aperture, and a sensing device having a photo-sensor array for sensing the component images. Focus detection error is prevented by determining a sense area of the photo-sensor array in accordance with a distortion created in an aperture image by the refocusing optical system.
|
申请公布号 |
US4698492(A) |
申请公布日期 |
1987.10.06 |
申请号 |
US19850749383 |
申请日期 |
1985.06.27 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
OHTAKA, KEIJI;HIRAMATSU, AKIRA;SUDA, YASUO;AKASHI, AKIRA;ISHIZAKI, AKIRA |
分类号 |
G02B7/34;G02B27/00;G03B3/00;G03B13/36;(IPC1-7):G03B13/28;G01J1/20 |
主分类号 |
G02B7/34 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|