Optical: systems and elements – Mirror – Plural mirrors or reflecting surfaces
Patent
1991-01-14
1993-05-25
Arnold, Bruce Y.
Optical: systems and elements
Mirror
Plural mirrors or reflecting surfaces
359859, G02B 510
Patent
active
052145409
ABSTRACT:
Optical mirror systems are provided by cooperative arrangements of a plurality of curved mirrors, preferably of approximately elliptical and hyperbolic shapes. In one arrangement, a convex segment of an hyperbolic primary mirror and a concave segment of an hyperbolic secondary mirror form a forward looking magnification system. In another arrangement, a concave segment of an elliptical primary mirror and a convex segment of an hyperbolic secondary mirror form a microscope. In still another arrangement, a convex segment of an hyperbolic primary mirror, a concave segment of an hyperbolic intermediate mirror and a concave segment of an elliptical secondary mirror form a periscope which may be assembled on an automobile for use as a wide angle rearview mirror in which the primary mirror is supported above the vehicle roof, the intermediate mirror is mounted on the dashboard in optical registry with the primary mirror through the windshield, and the secondary mirror also is mounted on the dashboard laterally displaced from the intermediate mirror for viewing by the driver of the vehicle.
REFERENCES:
patent: 1814667 (1931-07-01), Cowdrey
patent: 3203328 (1965-08-01), Brueggemann
patent: 3697154 (1972-10-01), Johnson
patent: 3752559 (1973-08-01), Fletcher et al.
patent: 3827059 (1974-07-01), Rambauske
patent: 4265510 (1981-05-01), Cook
patent: 4722101 (1988-02-01), Blower
patent: 4733955 (1988-03-01), Cook
Jenkins et al., "Fundamental of Optics", 3rd Edition, 1957 by McGraw-Hill Book Company, Inc. pp. 3-10.
Shafer; "Laser Beam Expander-A New Design"; SPIE vol. 190 LASL Optics Conference (1979) pp. 15-20.
Arnold Bruce Y.
Shafer R. D.
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