| 摘要 |
PURPOSE:To make exposing in a short period and to form a bright hologram with less noise by inserting an aperture between an original hologram and photosensitive material and changing illuminating light to two luminous fluxes. CONSTITUTION:The original hologram 12 and the aperture 13, etc. are provided. The two luminous fluxes 20, 21 are made incident to the hologram 12 and the aperture 13 which allows the passage of only the 1st order diffracted light 16 from the luminous flux 20 and the zero order diffracted light from the luminous flux 21 to permit the control of luminous intensity is used. The optimum intensity ratio of the zero order and 1st order diffracted light is realized by manufacturing an optical system for recording the interference fringe by two beams of such light, by which the other diffracted light is cut. Exposing over the entire surface is executed by moving simultaneously the two luminous fluxes 20, 21 and the aperture 13. The exposing is thus executed in the shorter period and the bright hologram with less noise is obtd. |
