Patent ID: 6043913
Filing Date: 2000-03-28
Classification: G03H

Abstract:
An apparatus for producing a dot matrix hologram, comprising:a laser source for providing a laser beam to form interference fringes, the laser beam being split and then overlapped to form interference fringes in a small region;a single lens for collimating the laser beam;an interference spot-revolving system for changing the direction of the interference fringes in the small region;an interference spot-adjusting system for adjusting the area of the small region by controlling the diameter of the cross section of the laser beam, the controlled diameter laser beam being input to the interference spot revolving system;a two dimensionally movable platform for supporting a recording substrate that is used to form a dot matrix hologram, the movable platform adjusting the position of the recording substrate;a shutter for controlling the exposure of the recording substrate to the laser by controlling the time that the laser beam passes through the shutter;a computer for forming a predetermined image on the recording substrate, the computer controlling the shutter to pass the laser beam of a predetermined intensity, and then controlling the interference spot-adjusting system to change the diameter of the cross section of the laser beam that is split and interfered in the interference spot-revolving system, thereby forming an interference spot on the recording substrate, thereafter sequentially forming other interference spots on different positions of the recording substrate by adjusting the direction of the interference fringe in the interference spot and moving the movable platform to accomplish production of a dot matrix hologram for the predetermined image.