Claims
- 1. A fringe direct writing system comprising:a light source for projecting and transmitting light; an LCD display positioned to receive said transmitted light to alter said transmitted light to produce and project an image; an imaging lens disposed downstream of said LCD display, said imaging lens manipulating said image for further processing: an objective lens positioned to receive said image from said imaging lens and project a reduced image onto a photo-material plate, whereby said photo-material plate reacts to said image to form a corresponding image thereon; a moveable stage capable of selectively moving throughout a two dimensional plane, wherein said photo-material plate is disposed on said moveable stage such that said moveable stage is moved to selectively expose a portion of said photo-material plate to said reduced image; and a computer to control an operation of said direct writing system, whereby said computer generates a fringe pattern to be displayed by said LCD display, selectively operates a high speed shutter disposed upstream of said LCD display to control an exposure timing; and selectively controls said moveable stage to facilitate the generation of a predetermined image on said photo-material plate.
- 2. A fringe direct writing system comprising:a light source for projecting and transmitting light; an LCD display positioned to receive said transmitted light to alter said transmitted light to produce and project an image; an imaging lens disposed downstream of said LCD display, said imaging lens manipulating said image for further processing; an objective lens positioned to receive said image from said imaging lens and project a reduced image onto a photo-material plate, whereby said photo-material plate reacts to said image to form a corresponding image thereon; and a rotation diffuser disposed between said light source and said LCD display, wherein said light source comprises a laser light source producing coherent light, said rotation diffuser serving to modulate said coherent light into incoherent light to avoid speckle noise.
Parent Case Info
The present invention is directed to a system previously disclosed in U.S. provisional application Ser. No. 60/013,155 filed Mar. 11, 1996 entitled “Security Optical Variable Device Using Direct Fringe Laser Writing” and is incorporated herein by reference.
US Referenced Citations (6)
Provisional Applications (1)
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Number |
Date |
Country |
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60/013155 |
Mar 1996 |
US |