Optical pattern generation technique

Details Optical pattern generation technique Optical pattern generation technique

1987-11-23

1989-07-11

Masinick, Michael A.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

356376, 382 28, H04N 718

Patent

active

RE0329843

ABSTRACT:
A rotatable drum is arranged around a surface lying generally parallel to the axis of rotation, a plurality of bar code patterns, the individual bars making up each pattern extending normal to the rotational axis. A light beam in a plane is projected onto the surface, the plane lying generally parallel to the rotational axis such that light strikes the surface. A light beam also in a plane is reflected from the surface, the beam having relatively light and relatively dark regions corresponding to the particular bar code patterns upon which the projected beam is imaged. The reflected beam is passed through a cylindrical lens which fans the reflected beam into a wedge shaped beam projecting onto an object in the path of the beam successive bar patterns as the drum rotates.

REFERENCES:
patent: 3488102 (1970-01-01), Buck et al.
patent: 3818444 (1974-06-01), Connell
patent: 4480919 (1984-11-01), Asano et al.
patent: 4488172 (1984-12-01), Hutchin
patent: 4499492 (1985-02-01), Hutchin
patent: 4573073 (1986-02-01), Corby
patent: 4593967 (1986-06-01), Haugen
"High-Speed Space Encoding Projector for 3D Imaging," by Rosenfeld et al., U.S. Postal Service Advanced Technology Conference, pp. 229-239.

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