Concentric optical system

Details Concentric optical system Concentric optical system

1994-10-21

1996-05-14

Dzierzynski, Paul M.

Optical: systems and elements

Mirror

Plural mirrors or reflecting surfaces

359364, 359365, 359366, 359497, 359642, 359726, 359727, 359728, 359853, 359858, G02B 1700, G02B 530, G02B 300, G02B 508

Patent

active

055173667

ABSTRACT:
A concentric optical system usable as either an imaging optical system or an ocular optical system, which has an F-number of 1.5 to 3 and enables a flat and clear image to be photographed or observed at a view angle of up to 60.degree. or more with substantially no aberration. The concentric optical system includes at least two semitransparent reflecting surfaces (2) and (3) each having a center of curvature disposed in the vicinity of a pupil (1) and a concave surface directed toward the pupil. The semitransparent reflecting surfaces are disposed so that each semitransparent reflecting surface passes each particular bundle of light rays at least once and reflects them at least once, thereby providing a flat image surface (4).

REFERENCES:
patent: 3065670 (1962-11-01), Becker
patent: 3752559 (1973-08-01), Fletcher et al.
patent: 4226501 (1980-10-01), Shafer
patent: 4235508 (1980-11-01), Kaprelian

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