| 摘要 |
PURPOSE:To prevent the incidence of part of the luminous flux from a light source in the form of stray light on a fiber system by providing a notch to the face of a block, which reflects the luminous flux from a light source and projects the same to a subject side, on the side opposite from the face on which the luminous flux is made incident. CONSTITUTION:The notch 31 is provided to the face of the block 12 having the reflection face 13, which reflects mainly IR light and allows the transmission of visible light, on the side opposite from the face on which the luminous flux is made incident in an optical system for automatic focus detection which is disposed with the above-mentioned block 12 in part of the optical system, projects the luminous flux from the light source 15 to the subject side via the reflection face 13 of the block 12 and part of the above-mentioned optical system and measures the distance to the subject by utilizing the luminous flux reflected from the subject. |
