| 摘要 |
PURPOSE:To deal with even the combination of a focal point detecting device having many ranging views with a high magnification zoom lens and to light a broad range by setting an overlapping part of a light source image on the ranging view ranging on an optical axis of a photographing lens. CONSTITUTION:A light beam emitted from a light emitting diode 37 is projected on an object side through a dome 32 and a floodlight lens 31, and the image of the light emitting diode 37 is formed. The emitting surface of the floodlight lens 31 is divided into four parts, and four optical axes A-D are arranged in a line. A luminous flux is divided into four directions, and the images of four light emitting diodes are projected in a line. The overlapping part of the images of the light emitting diodes is formed by the luminous flux transmitting through the surfaces 31b and 31c of the floodlight lens 31, and the overlapping width is decided by a gap between the optical axes B, C. The overlapping part is projected on the optical axis of the photographing lens. Thus, even when the photographing lens is zoomed, the object whose overlapping part is projected is caught by the ranging view on the optical axis used maximally always. |
