Patent EP0446949A1 successfully refreshed from Google Patents.
EP0446949A1
Expired / Lapsed
EP
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System for correcting an aberration in an optical system
Assignee: Citizen Watch Co Ltd
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Filing: 1991-03-15
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Granted: —
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Expires: 2011-03-15
Abstract
Abstract An optical system has an image producing element (7), and an aberration detector (13,17) for detecting an aberration in the optical system for producing a correcting signal. A transparent liquid crystal panel (5) is provided in the optical system. The liquid crystal panel has a plurality of pixels arranged in the form of a matrix. The correcting signal is applied to electrodes (9) of the pixels for changing the refractive index in the pixel for correcting the aberration.
Inventors
- 👤 Nobuyuki Gijutsukenkyujo Citizen Hashimoto
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 03:37
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/29; G02B; G02B26/00; G02B26/06; G02B27/00; G02B27/0025; G02F1/01; G02F1/13; G02F1/1313; G02F2203/00; G02F2203/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
114 words
A system for correcting an aberration in an optical system having an image producing element, aberration detecting means for detecting the aberration in the optical system for producing a correcting signal, correcting means responsive to the correcting signal for correcting the aberration, the correcting system comprising: said correcting means including a liquid crystal panel as a spatial light modulator, the liquid crystal panel having a plurality of pixels arranged in the form of a matrix, each of pixels having an individually driven electrode; driving means responsive to the correcting signal for producing a driving signal which is applied to selected electrodes for changing refractive index of each pixel so as to correct the aberration.
Claim 2
Dependent Claim
13 words
The system according to claim 1 wherein the liquid crystal panel is transparent.
Claim 3
Dependent Claim
27 words
The system according to claim 1 wherein the liquid crystal panel is disposed at either of an entrance pupil, exit pupil or stop of the optical system.
Claim 4
Dependent Claim
31 words
The system according to claim 1 further comprising a polarizer disposed in front of the liquid crystal panel, the liquid crystal panel being aligned in the same direction as the polarizer.
References Cited (Backward Citations)
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