G - Physics – 03 – H
Patent
G - Physics
03
H
88/0.14
G03H 1/14 (2006.01) G03H 1/10 (2006.01)
Patent
CA 1121626
ABSTRACT OF THE DISCLOSURE A packageable system employs principles of Doppler holography on near-field objects to produce images from which photographs, transparencies or video reproductions can be made with simultaneous improvements in depth of field, foreground-backregion exposure ratio, and resolution (where degraded by the object medium ). The apparatus includes a laser and associated optics for illuminating an object on A rotating/oscillating platform from which reflected light is collected and imaged on or near a hologram plane along with a Doppler- shifted reference beam: a beam splitter splits a laser beam into two parts. For one beam an expander provides a diverging beam which reflects through a mirror or beam/splitter onto the object. Reflected light passes from the object through an aperture in an object lens where it is focused and projected to a new focus on or near the hologram plane. Another part of the beam split off by the first beam splitter is directed to A mirror, through a beam expander and a collimator, to strike a rotating oscillating reference mirror. A pair of reference beam focus lenses conjugates the plane of the reference morror onto or near the hologram plane. With proper adjustments of ? and ? (instantaneous reference mirror angular velocity and focus position of the object lens), Doppler- resolved holographic images appear at the holographic plane.
360693
Christensen Charles R.
Smith James L.
Aspila Kalevi P.
The Government Of The United States As Represented By The Secret
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