| 摘要 |
PROBLEM TO BE SOLVED: To provide a display device within a finder whose cost is made low. SOLUTION: The finder display device performing display within a finder 4 is equipped with a diffraction optical element 1 (ESHOE: Electrically Switchable Holographic Optical Element) arranged near the scheduled image formed surface of an objective lens and capable of realizing electric switching, a light projecting part 3 projecting illuminating light toward the element 1, and a control part 2 electrically controlling the projecting part 3 and the element 1. The display device is constituted so that illuminating light projected by the projecting part 3 may be directed to the finder 4 as display light through the element 1 in accordance with the control of the control part 2. |
