| 摘要 |
A focus detection device for an image forming optical system comprises a micro-lens array constituted with a plurality of two-dimensionally arrayed micro-lenses, a light-receiving element array that includes a plurality of light-receiving elements receiving a light flux from the image forming optical system via the micro-lenses, the plurality of light-receiving elements being disposed in correspondence to each micro-lens, and a focus detection means that generates image data representing an image formed by the image forming optical system and a focus detection signal, which corresponds to a focus adjustment state at the image forming optical system, based upon signals output from the light-receiving elements at the light-receiving element array, and that detects the focus adjustment state at the image forming optical system based upon the image data and the focus detection signal. |
