| 摘要 |
PURPOSE: To form a high-efficiency hologram free from an additional adhesive layer by lowering the sensitivity of a first hologram formed on a substrate, forming a second hologram thereon and adhering the second hologram to the first hologram. CONSTITUTION: A light sensing layer 10 of gelatin contg. a bichromate, etc., on the principal plane of a substrate 14 is dried to a specified moisture content to form a first hologram. The first hologram is cleaned, partially developed and so on, and a second hologram is formed in succession. In this case, the sensitivity of the first hologram is lowered to disturb the interaction with the second hologram. The layer is thereafter coated with a light sensing layer 18 identical to the layer 10 to form the the second hologram, the second hologram is developed along with the partially developed first hologram, hence the second hologram is firmly held to the first hologram, and a high-efficiency hologram free from an additional adhesive layer by multilayer holography is formed.
|
