Patent
1988-10-27
1991-01-08
Arnold, Bruce Y.
350 366, 350 37, G03H 102, G03H 108
Patent
active
049830031
ABSTRACT:
High side lobes shown in a hologram efficiency curve are suppressed by reducing the effective sensitivity of a holographic recording medium by a plurality of film layers of gelatin such that there is a continuous increase in sensitivity toward the center of the layers. This makes the recording medium more spectrally selective and increases the "see-through" characteristic. A holographic fringe pattern with a normally uniform modulation recorded in such holographic medium layers will produce a hologram having a modulation in refractive index which is virtually zero at the surfaces and which increases toward the center of the medium. The layers in the recording medium can have varying degrees of photosensitivity. However, when combined, the layers provide an overall sensitivity which can be depicted as a generally sinusoidal curve. The generally smooth transition in sensitivity from one layer to the next is largely achieved by the mixing of layers at their interfaces.
REFERENCES:
patent: 4329409 (1982-05-01), Wreede et al.
patent: 4687720 (1987-08-01), Wreede et al.
patent: 4799746 (1989-01-01), Wreede
patent: 4815800 (1989-03-01), Chern et al.
patent: 4818045 (1989-04-01), Chang
patent: 4826290 (1989-05-01), Wreede et al.
patent: 4854674 (1989-08-01), Wreede et al.
Arns James A.
Wreede John E.
Alkov Leonard A.
Arnold Bruce Y.
Denson-Low Wanda K.
Hughes Aircraft Company
Nguyen Thong
LandOfFree
Alternate methods of side lobe reduction in holograms does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Alternate methods of side lobe reduction in holograms, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Alternate methods of side lobe reduction in holograms will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-930237