Projector

Details Projector Projector

1975-06-23

1976-10-26

Haroian, Harry N.

Optics: image projectors

Miscellaneous

353 99, 353 80, G03B 2100

Patent

active

039880591

ABSTRACT:
A wide angle projector is disclosed for projecting an image having an illuminated and unilluminated region on either side of a straight boundary region which defines a datum plane established by the orientation of the projector. The image is detected at a position removed from the projector by an instrument which establishes the center of the boundary region and indicates its position to indicate the position of the datum plane. The wide angle projection is accomplished by the use of cylindrical reflecting optics bounded by reflecting sidewalls and a reticle in the form of an occluding knife edge or a knife edge at the edge of a reflecting surface, depending on the particular projection system utilized.

REFERENCES:
patent: 2602326 (1952-07-01), Russonberger
patent: 3129335 (1964-04-01), Stewart
patent: 3439988 (1969-04-01), Breske
patent: 3600077 (1971-08-01), Paiva
patent: 3638692 (1972-02-01), Carter
patent: 3706284 (1972-12-01), Plasser
patent: 3807846 (1974-04-01), Swonk

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