Optical: systems and elements – Holographic system or element – For synthetically generating a hologram
Patent
1992-12-22
1995-06-20
Ben, Loha
Optical: systems and elements
Holographic system or element
For synthetically generating a hologram
359 29, 359 32, 359559, G03H 108, G03H 116, G03H 122, G02B 2746
Patent
active
054265215
ABSTRACT:
A method of and apparatus for efficiently correcting an aberration of an optical system used to record a hologram at the stage of reconstructing an image of the hologram. At the stage of reconstructing an image of a hologram (3), which contains the record of interference fringes formed by a reference plane wave and an object wave modulated by a sample, by applying a plane wave for reconstruction to the hologram (3) from a laser (1), an aberration of an optical system used to record the hologram (3) is canceled by the phase distribution on a liquid crystal panel (6) having a spatial phase modulation function, which is disposed on the Fourier transform plane, thereby correcting the aberration. The phase distribution on the liquid crystal panel (6) can be changed flexibly by a computer (9) in accordance with the aberration coefficients or degree of defocusing of the recording optical system.
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Chen Jun
Ishizuka Kazuo
Lai Guanming
Tonomura Akira
Ben Loha
Jr. John Juba
Research Development Corporation of Japan
Tonomura Akira
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