| 摘要 |
PURPOSE:To enable change of a visual field by simple constitution by providing a hologram on which >=2 visual field frames corresponding to object distances are multiplex-recorded to a finder optical system. CONSTITUTION:The optical system of a finder consists of an objective lens 10, an eyepiece lens 12, a hologram 14 which is provided between the lens 10 and the lens 12 and on which three visual field frames 22, 24, 26 are multiplex-recorded and light sources 16, 18, 20 which irradiate reconstructing light to the hologram 14. The frame 22 which corrects parallax with the distance on a long distance side, the frame 24 which corrects the parallax with the distance on a middle distance side and the frame 26 which corrects the parallax with the distance on a short distance side are multiplex-recorded on the hologram 14 in such a way that the respective frames can be reconstructed by the light sources 16, 18, 20. |
