| 摘要 |
PURPOSE:To obtain a complicated hologram even if an object to be photographed has a relatively simple shape, by modulating preliminarily the light for photography properly into a pattern form and irradiating the object to be photographed with this light. CONSTITUTION:The light emitted from a light source 1 is divided by a beam splitter 2, and one light reaches a dry plate 5 through a mirror 3a and a lens 4a. An object 7 to be photographed is irradiated with the other light through a mirror 3b, a lens 4b, and a filter 6, and the reflected light reaches the dry plate. Beams of light which reach the dry plate from two directions interfere each other to give a latent image of the hologram onto the dry plate, and a proper development is performed to obtain the hologram. A laser light source having a high coherent property is normally used as the light source 1, and a dry plate where a sensitizer layer 5b consisting of a silver salt, a photoresist, or the like is provided on a substrate 5a is used as the dry plate 5. A silver salt photographic film, a dry plate, a liquid crystal pattern, a printed matter, or a material having a transmission pattern may be used as the filter 6, and either one or plural of them may be used. |
