Reflection holograms formed by scanning

Details Reflection holograms formed by scanning Reflection holograms formed by scanning

1987-03-19

1989-09-05

Arnold, Bruce Y.

350 37, 350 371, G03H 104

Patent

active

048632252

ABSTRACT:
A method of producing a reflection hologram wherein light from a source (29) is directed onto the hologram recording medium (23) via a lens (21) which causes light reaching the medium (23) to pass through a construction point (33). The light beam is arranged where it is incident on the lens (21) to be of small cross-sectional area compared with the lens aperture and is arranged to scan over the lens aperture so that the beam scans the medium (23) in a regular pattern of overlapping narrow bands. In this way the hologram may be made to have uniform spectral properties despite a non-uniform energy distribution in the beam.

REFERENCES:
patent: 3698010 (1972-10-01), Lee
patent: 3706080 (1972-12-01), Lee
patent: 3720453 (1973-03-01), Lee et al.
patent: 3883216 (1975-05-01), Lee
patent: 4128297 (1978-12-01), Bourne
patent: 4293864 (1981-10-01), Scott
patent: 4395088 (1983-07-01), Firth et al.

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