| 摘要 |
PURPOSE:To separate the position of an image sensor from a photographic optical path while holding a distance measurement area in the center of an image plane, by providing a reflecting member so that its one edge perpendicular to the optical axis of an objective of a reflection member on or near the optical axis of the objective. CONSTITUTION:A pupil split type focus detector is provided with a submirror 4 so that the upper edge 4a of the submirror 4 coincides with the photographic optical axis X or is slightly above it at a finder observation position, so the interval (x) between the submirror 4 and a film F on the photographic optical axis becomes longer than that of a conventional device. The image sensor 5 is provided at the position of distance (y) where the interval (x) is equal to the length of the optical path, so that the image sensor 5 is separated sufficiently from the photographic optical axis (x) in order to prevent photographic luminous flux from being vignetted. |
