Phase modulation holographic device for generating two different

Details Phase modulation holographic device for generating two different Phase modulation holographic device for generating two different

1993-09-15

1996-12-24

Gonzalez, Frank

Optical: systems and elements

Holographic system or element

Using modulated or plural reference beams

359 15, 359 19, 359569, G03H 112

Patent

active

055878156

ABSTRACT:
A phase modulating device for spatially modulating a phase of an incident light beam is of a binary type having a plurality of rectangular protrusions on a cross section thereof. A distribution is provided to a diffraction efficiency at each point of the phase modulating device by varying a width of each protrusion.

REFERENCES:
patent: 4881805 (1989-11-01), Cohen
patent: 4936666 (1990-06-01), Futhey
patent: 5218471 (1993-06-01), Swanson et al.
patent: 5227915 (1993-07-01), Grossinger et al.
patent: 5276551 (1994-01-01), Nakagawa

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