Optical: systems and elements – Deflection using a moving element – Pivotal or rotational element
Patent
1994-12-19
1995-10-03
Dzierzynski, Paul M.
Optical: systems and elements
Deflection using a moving element
Pivotal or rotational element
359196, 359205, 359212, 359223, 359570, 359572, G02B 2608, G02B 518
Patent
active
054557089
ABSTRACT:
A scan angle doubling system using a rotating cylindrical drum with reflective binary diffractive optical element facets, a cylindrical mirror, and a lens to increase the scanning angle available from a rotating mirror polygon of a given size. The properties of the passive components are such that the output light beam from the reflective binary diffractive optical element facets of the rotating cylindrical drum is collimated and normal to the rotating cylindrical drum. The cylindrical drum, cylindrical mirror, and lens are arranged such that the rotating cylindrical drum and the cylindrical mirror are opposed to each other and separated by a distance greater than the sum of the radius of curvature of the cylindrical mirror plus the focal length of the lens, and the lens is interposed between the rotating cylindrical drum and the cylindrical mirror so that the center of the radius of curvature of the cylindrical mirror and the focal point of the lens means are coincident.
REFERENCES:
patent: 3973826 (1976-08-01), Lobb
patent: 4846552 (1989-07-01), Veldkamp et al.
patent: 4895790 (1990-01-01), Swanson et al.
patent: 5266796 (1993-11-01), Leviton
W. Veldkamp & T. McHugh, "Binary Optics", Scientific American, vol. 266, No. 5, May 1992, pp. 92-97.
G. J. Swanson, "Binary Optics Technology:The Theory and Design of Multi-Level Diffractive Optical Elements", Lincoln Laboratory, Massachusetts Institute of Technology, Technical Report 854, 14 Aug. 1989.
Harris Ellis D.
Wilson James M.
Dzierzynski Paul M.
Propp William
Schuberg Darren
Xerox Corporation
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