Optical: systems and elements – Single channel simultaneously to or from plural channels – By partial reflection at beam splitting or combining surface
Reexamination Certificate
2007-12-03
2010-12-28
Dinh, Jack (Department: 2873)
Optical: systems and elements
Single channel simultaneously to or from plural channels
By partial reflection at beam splitting or combining surface
C369S112020
Reexamination Certificate
active
07859762
ABSTRACT:
An aberration correction apparatus comprising a liquid crystal device which includes a first electrode layer that is formed with regions divided concentrically, a second electrode layer that is formed with regions divided concentrically, and a liquid crystal that is sandwiched in between the first electrode layer and the second electrode layer, and which transmits an incident light beam therethrough, an objective lens which condenses the light beam transmitted through the liquid crystal device, and a liquid-crystal-device drive circuit which drives the liquid crystal device, wherein the liquid-crystal-device drive circuit impresses a potential which belongs to a predetermined region included in a liquid crystal characteristic that is a relationship between potentials impressed on the respective electrode layers sandwiching in the liquid crystal therebetween and a phase change magnitude of the light beam transmitted through the liquid crystal, on the concentric regions formed in the first electrode layer, and it impresses a potential which belongs to a region included in the liquid crystal characteristic and exhibiting a smaller phase change magnitude per unit drive voltage than in the predetermined region, on the concentric regions formed in the second electrode layer, whereby an aberration of the light beam is corrected.
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Eiza Tsuyoshi
Shimizu Shinya
Dinh Jack
Funai Electric Co. Ltd.
Morgan & Lewis & Bockius, LLP
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