G - Physics – 03 – H
Patent
G - Physics
03
H
88/0.14
G03H 1/02 (2006.01) G02B 5/32 (2006.01) G03H 1/04 (2006.01) G03H 1/18 (2006.01)
Patent
CA 1159690
TRANSMISSIVE HOLOGRAPHIC OPTICAL ELEMENT ON ABERRATING SUBSTRATE Abstract of the Disclosure An inexpensive, high quality transmissive holographic optical element and method for making are described. The holographic optical element consists of a potentially aber- rating substrate which supports a layer of holographic re- cording material. The material contains a recorded fringe pattern that cancels the aberrations induced in an image wavefront as it passes through the aberrating substrate. This optical element is formed by a method having the fol- lowing steps. A first wavefront from a source, for example a point focus, is passed through the aberrating substrate, becomes distorted, and then passes through the holographic recording material to a wavefront conjugator. The conjugator launches a conjugate of the distorted wavefront back to the holographic recording material. A second wavefront is then passed through the holographic recording material to form a fringe pattern or hologram as a result of the interference of the conjugate waveform and the second waveform. Subse- quently, the developed holographic optical element is illu- minated with a reconstruction wave which is the duplicate of the reference wave. Passage of this reconstruction wave through the holographic layer results in an emerging wave- front identical to the conjugated distorted wavefront which is then converted to the original wavefront as it passes through the aberrating substrate. SA9800277
388846
Bjorklund Gary C.
Sincerbox Glenn T.
International Business Machines Corporation
Rosen Arnold
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