发明授权
- 专利标题: Method of constructing a hologram whose thickness is independent of the thickness of the holographic recording material
- 专利标题(中): 构造厚度与全息记录材料的厚度无关的全息图的方法
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申请号: US788073申请日: 1985-10-16
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公开(公告)号: US4936642A公开(公告)日: 1990-06-26
- 发明人: Jen-Lih Hung , Robert B. Wood
- 申请人: Jen-Lih Hung , Robert B. Wood
- 申请人地址: OR Portland
- 专利权人: Flight Dynamics, Inc.
- 当前专利权人: Flight Dynamics, Inc.
- 当前专利权人地址: OR Portland
- 主分类号: G03H1/04
- IPC分类号: G03H1/04
摘要:
A method of constructing flare-free reflection holograms uses a light scattering mechanism positioned between a first exposure beam and holographic recording material to remove the spatial coherence from all but adjacent rays within a relatively small angular range before the light rays of the first exposure beam strike the hologram surface. A second exposure beam of spatially coherent light rays interferes with mutually spatially coherent light rays of the first exposure beam to form a primary hologram. Light rays reflected off the holographic recording material noncontacting surface of the substrate interfere with the light rays of the first exposure beam but do not form parasitic hologram recordings because the interfering light rays are not mutually spatially coherent. The size of the region on the scattering device illuminated by the first exposure beam can also be selectively adjusted to determine the angular range of spatial coherence of the exposure beam and thereby create a primary hologram whose thickness is independent of and, if desired, may be made less than the thickness of the holographic recording material.
公开/授权文献
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