Title:
IMPROVED INCOHERENT LIGHT HOLOGRAPHIC DEVICE AND METHOD
Document Type and Number:
WIPO Patent Application WO/1993/011445
Kind Code:
A1
Abstract:
The present invention relates to a holographic method including the step consisting in forming the hologram of a point by means of an optical system comprising a crystal (131) and two polarizers (132, 135) placed respectively upstream and downstream of the crystal (131), characterized in that it is further comprised of the following steps: i) separating the responses of the optical system corresponding to two different polarizations, and ii) combining said two responses in order to obtain a signal which does not depend on the distance from the point P to the optical system. The invention also relates to a device for implementing such method.
Inventors:
CHARLOT DIDIER (FR)
MALET YANN (FR)
MALET YANN (FR)
Application Number:
PCT/FR1992/001095
Publication Date:
June 10, 1993
Filing Date:
November 25, 1992
Export Citation:
Assignee:
LE CONOSCOPE S A (FR)
International Classes:
G01S11/12; G02B7/28; G03H1/06; (IPC1-7): G01S11/12; G02B7/28; G03B13/36; G03H1/06
Domestic Patent References:
| WO1988005525A1 | 1988-07-28 |
Foreign References:
| EP0376837A1 | 1990-07-04 | |||
| EP0394137A1 | 1990-10-24 | |||
| US3199400A | 1965-08-10 | |||
| EP0394138A1 | 1990-10-24 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 14, no. 128 (P-1019)9 Mars 1990
OPTICS COMMUNICATIONS. vol. 65, no. 4, 15 Février 1988, AMSTERDAM NL pages 243 - 249 G.Y. SIRAT ET AL 'CONOSCOPIC HOLOGRAMS'
OPTICS COMMUNICATIONS. vol. 65, no. 4, 15 Février 1988, AMSTERDAM NL pages 243 - 249 G.Y. SIRAT ET AL 'CONOSCOPIC HOLOGRAMS'
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