Focus-corrected convergent beam scanner

Details Focus-corrected convergent beam scanner Focus-corrected convergent beam scanner

1984-12-20

1987-02-03

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358113, H04N 308, H04N 309

Patent

active

046411925

ABSTRACT:
A focus-corrected convergent beam scanner includes a lens arranged to receive light from a scene and to form an image of the scene in an image plane. A mirror annulus is arranged behind the lens to reflect light from the scene which is passed through the lens. A detector is arranged to receive light from the scene which has been reflected by the mirror annulus. The mirror annulus is rotatable about an axis of rotation in order to scan the image of the scene across the detector. The tilt angle of the reflecting surface of the mirror annulus varies as a function of the position of the reflecting surface along the circumferential axis of the mirror annulus. The circumferential axis is arranged at a varying distance from the lens such that the image plane of the scene is always reflected onto the detector.

REFERENCES:
patent: 1787920 (1931-01-01), Watson
patent: 2089588 (1937-08-01), Von Mihaly
patent: 3626091 (1971-12-01), Casper
patent: 4575632 (1986-03-01), Lange

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