发明授权
US06525821B1 Acquisition and replay systems for direct-to-digital holography and holovision
失效
用于直接数字全息和全息的采集和重放系统
- 专利标题: Acquisition and replay systems for direct-to-digital holography and holovision
- 专利标题(中): 用于直接数字全息和全息的采集和重放系统
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申请号: US09477267申请日: 2000-01-04
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公开(公告)号: US06525821B1公开(公告)日: 2003-02-25
- 发明人: Clarence E. Thomas , Gregory R. Hanson
- 申请人: Clarence E. Thomas , Gregory R. Hanson
- 主分类号: G01B9021
- IPC分类号: G01B9021
摘要:
Improvements to the acquisition and replay systems for direct-to-digital holography and holovision are described. A method of recording an off-axis hologram includes: splitting a laser beam into an object beam and a reference beam; reflecting the reference beam from a reference beam mirror; reflecting the object beam from an illumination beamsplitter; passing the object beam through an objective lens; reflecting the object beam from an object; focusing the reference beam and the object beam at a focal plane of a digital recorder to form an off-axis hologram; digitally recording the off-axis hologram; and transforming the off-axis hologram in accordance with a Fourier transform to obtain a set of results. A method of writing an off-axis hologram includes: passing a laser beam through a spatial light modulator; and focusing the laser beam at a focal plane of a photorefractive crystal to impose a holographic diffraction grating pattern on the photorefractive crystal. A method of replaying an off-axis hologram includes: illuminating a photorefractive crystal having a holographic diffraction grating with a replay beam.
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