Heterodyne scanning system for hologram transmission专利检索-隔行扫描图形技术专利检索查询-专利查询网

Heterodyne scanning system for hologram transmission

阅读：712发布：2022-09-13

专利汇可以提供Heterodyne scanning system for hologram transmission专利检索，专利查询，专利分析的服务。并且A hologram heterodyne scanner wherein a stationary coherent light beam illuminates the subject and is then optically relayed via a beamsplitter to a photodetector. The other phase-locked optical frequency, needed for the reference beam, is derived from the first-mentioned beam by means of a Doppler technique. The Doppler-shifted reference beam is orthogonally disposed with respect to the stationary beam and it is likewise relayed to the photodetector via the beamsplitter. The reference beam is focused to define a small spot and the latter is raster scanned with respect to the stationary beam. A random interlace scan is utilized, which helps to eliminate the scanning structure from the hologram. The photodetector is purposely placed at an out-offocus location with respect to the locus of the scanning beam waist.，下面是Heterodyne scanning system for hologram transmission专利的具体信息内容。

权利要求

1. A holographic heterodyne scanner comprising means for illuminating a subject with a stationary coherent light beam, photodetector means, a beamsplitter positioned to optically relay the subject illuminating beam toward said photodetector means, means for deriving a reference beam which is doppler-shifted and thereby phase-locked with respect to the subject-illuminating beam, means for focusing said reference beam, the focused reference beam also being optically relayed by said beamsplitter to said photodetector means, said photodetector means being disposed at an out-of-focus location with respect to the waist of the focused reference beam, and means for raster scanning the waist of said reference beam with respect to the optically relayed subject-illuminating beam.

2. A holographic scanner as defined in claim 1 wherein said photodetector means is positioned so as to intercept all of the area common to the two incident beams.

3. A holographic scanner as defined in claim 2 wherein the means for deriving the doppler-shifted reference beam comprises a mirror for reflecting incident light and an electrodynamic movement means for moving said mirror axially with regard to said incident light to thereby doppler-shift the same.

4. A holographic scanner as defined in claim 3 wherein said photodetector means comprises a pair of orthogonally disposed photodetectors connected in a balanced modulator configuration.

5. A holographic scanner as defined in claim 2 wherein said raster scan is of a random interlaced nature.

6. In combination with the holographic scanner as defined in claim 5, a kinescope display means, means for delivering the holographic information output signal of the photodetector means to said kinescope display means to provide a video displAy of said holographic information, and means providing a multifield time exposure of said video display.

7. The combination as defined in claim 6 including means for substantially eliminating position dependent modulations from said exposure.

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Heterodyne scanning system for hologram transmission

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