1974-08-21
1976-10-05
Corbin, John K.
350293, G02B 2717
Patent
active
039841715
ABSTRACT:
A system for providing a vertically and horizontally defined continuous linear scan of predetermined length of an incident light source output, such as from a coherent light source, such as a laser, in a predetermined focal plane, wherein the incident light source is initially focused to form a scanning spot before deflection with the inherently curved scan locus associated with this deflected scanning spot being straightened to provide the continuous linear scan by means of a non-planar reflecting compensator, such as a spherical reflecting surface chordal segment. The focused scan spot is initially deflected, such as by a conventional oscillating single plane member or a conventional rotating multifaceted reflector which has been tilted at a predetermined offset angle from the optical axis between the incident light source output and the initial deflector to cause the focused light spot to inpinge upon the spherical chordal segment at an intercept point offset below the virtual center of the spherical surface capable of providing the spherical chordal segment, this intercepted spot being reflected to provide the continuous linear scan of predetermined length in the focal plane, such as on a record medium located therein. The oscillating mirror or rotating multifaceted reflector causes the focused spot to traverse the record medium to provide the linear scan and, movement of the record medium perpendicular to the focused spot traversing linear scan provides an area scan of the record medium. The system may be employed, by way of example, in a straight line galvo recorder in which the scanning plane mirror and folding mirror optics may be utilized or in a straight line spinner scanner in which a multifaceted reflector and folding mirror optics may be utilized. An optical reader may be utilized in conjunction with the system for reading the linear scan.
REFERENCES:
patent: 3790246 (1974-02-01), Pickering
patent: 3881801 (1975-05-01), Bechtold
Corbin John K.
Image Information Inc.
Rosenberger Richard A.
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