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US 5,064,257 AGranted
Optical heterodyne scanning type holography device
AssigneesHamamatsu Photonics K.K., Ting-Chung Poon
InventorsKazunori Shinoda, Ming H. Wu, Yoshiji Suzuki, Ting-Chung Poon
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Abstract
There is disclosed an optical heterodyne scanning holography device capable of recording and reconstructing a holographic image of an object in real time by optical heterodyne-scanning the object, capturing a scattered wave from the object by a photodetector, and converting a heterodyne output current from the photodetector to a spatial light modulator for coherent processing optically.
Claims5
An optical heterodyne scanning holography device comprising:
- a light source for emitting an optical beam;
- a frequency shifter for converting the optical beam to two optical beams each having temporally different frequencies;
- an interferometer for superimposing one of the two optical beams as a spherical wave and the other as a plane wave;
- a scanner for scanning an object with the superimposed optical beams;
- a photodetector for capturing scattered waves of the optical beams from the object;
- and
- a spatial light modulator for coherently converting a signal from the photodetector.
4 more elements
Dependencies are inferred from the claim text.