G - Physics – 03 – H
Patent
G - Physics
03
H
88/0.14, 88/0.15
G03H 1/28 (2006.01) G02B 1/04 (2006.01) G03H 1/02 (2006.01) G03H 1/04 (2006.01) G03H 1/26 (2006.01)
Patent
CA 2022017
A recording medium has a first fringe pattern which is described by a first spectral bandwidth and a first image blur factor. The recording medium also has a second fringe pattern which is described by a second spectral bandwidth and a second image blur factor, the first spectral bandwidth being different from the second spectral bandwidth, and the first image blur factor being substantially equal to the second image blur factor. By providing multiple holograms in the single recording medium, the spectral bandwidths of each hologram are combined to provide an overall spectral bandwidth. Since the image blur factors of each hologram are substantially the same, i.e., overlap, when the two holograms are combined, the overall image blur factor is not increased. Indeed, it decreases at the same time the thickness of the recording medium is increased by a factor which is equivalent to the number of exposures in the single recording medium. The result is increased bandwidth without a concomitant increase in image blur.
Hughes Aircraft Company
Sim & Mcburney
LandOfFree
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