发明公开
EP0934540A1 APPARATUS AND METHOD FOR GENERATING DIFFRACTIVE ELEMENT USING LIQUID CRYSTAL DISPLAY
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基本信息:
- 专利标题： APPARATUS AND METHOD FOR GENERATING DIFFRACTIVE ELEMENT USING LIQUID CRYSTAL DISPLAY
- 专利标题（中）：装置和方法，用于产生衍射元件中使用的液晶显示器
- 申请号：EP97945468.0 申请日：1997-10-01
- 公开(公告)号：EP0934540A1 公开(公告)日：1999-08-11
- 发明人： LONG, Michael, D.
- 申请人： Pacific Holographics, Inc
- 申请人地址： 503 Caledonia Street Santa Cruz, CA 95062 US
- 专利权人： Pacific Holographics, Inc
- 当前专利权人： Pacific Holographics, Inc
- 当前专利权人地址： 503 Caledonia Street Santa Cruz, CA 95062 US
- 代理机构： Sparing - Röhl - Henseler Patentanwälte
- 优先权： US19960738767 19961028
- 国际公布： WO1998014805 19980409
- 主分类号： G03H1
- IPC分类号： G03H1 ; G06K19
摘要：
Apparatus and method for recording diffractive high resolution graphical information is suited to recording information that would be difficult to counterfeit. In one embodiment, light is selectively passed by a shutter (52), and through spatial filter (54) to remove noise. Liquid crystal display (68) or similar display device receives a data stream from computer (20) and displays periodic structure(s), diffracting the incident beam into one or more diffracted beams (59). Lens (78) focuses an image of the macroscopic pattern formed of these periodic structures to a recording material in image plane (80) where diffracting structure(s) caused by the overlap of some or all the diffracting beams and, optionally, the undiffracted beam, is created. Optional mask (76) blocks some or all of the diffracted and undiffracted beams. The recording material is moved and the process repeated with another pattern of periodic structures until the desired macroscopic image is composited.