| 摘要 |
PURPOSE:To uniform exposure light through a simple device by providing a disk for exposure adjustment which is larger in opening rate larger at the circumferential part than at the center part at the incidence side of a photosensitive surface for reference light, and performing exposure while rotating the disk. CONSTITUTION:The disk for exposure adjustment applied to the photographing method of a hologram is shown in a figure as an example. A laser beam 9 from a laser light source 8 is split by a beam splitter 10 into two, and a beam 11 facing up reaches the photosensitive material 14 as reference light through a mirror 12 and a lens 13. At this time, the disk 15 for exposure adjustment is rotated by a motor M to uniform the beam reaching the photosensitive material 14. The other beam 16 passed through the beam splitter 10 illuminates a body 19 to be photographed through a mirror 17 and a lens 18, and its reflected light reaches the photosensitive body 14 as object light. |
