The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 28, 2000
Filed:
Jun. 19, 1998
Ying-Tsung Lu, Hsinchu, TW;
Pai-Ping Huang, Hsinchu Hsien, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
An apparatus for producing a dot matrix hologram is provided, which can fabricate a hologram of high quality, simplify the construction, and reduce the cost. This apparatus includes a laser source for providing a laser beam to form interference fringes, in which the laser beam is split and then overlapped to form interference fringes in a 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; an interference spot-revolving system for changing the direction of the interference fringes in the small region; a two-dimensionally movable platform, on which a recording substrate that is used to form a dot matrix hologram can be placed, for adjusting the position of the recording substrate; a shutter for controlling the exposure intensity by controlling the time that the laser beam passes through the shutter; a computer, for controlling the shutter to pass a 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, to thereby form 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 the production of a dot matrix hologram for the predetermined image.