| 摘要 |
PURPOSE:To split light for multipurpose use, such as automatic focusing, by providing an optical splitting member behind a rotary mirror for a viewfinder, and splitting luminous flux from an object in plural directions. CONSTITUTION:A submirror 3, ecc., for optical splitting is provided behind a rotary mirror 2 for a viewfinder in a single-lens reflex camera, and luminous flux from an object is reflected by the semitransparent surface 3' and total reflection surface 3'' of the mirror 3 to be split into two, which are photodetected by photosensitive elements 4 and 5, etc. This constitution splits the object luminous flux for multipurpose use, such as automatic focusing. |
