Compact, folded wide-angle large reflective unobscured...

Details Compact, folded wide-angle large reflective unobscured... Compact, folded wide-angle large reflective unobscured...

G - Physics

02

B

G02B 23/02 (2006.01) G02B 17/06 (2006.01) G02B 23/06 (2006.01) G02B 27/64 (2006.01)

Patent

CA 2134382

A wide-angle optical imaging system (10) employs three mirrors (20, 22, 24) to reflect and propagate beams of electromagnetic energy (16, 17, 18) from four reflecting surfaces. A convex mirror (20) is the primary mirror/reflector. A concave mirror (22) is both the secondary and quaternary mirror/reflector for the system. A folding mirror (24) which is essentially flat mirror is the tertiary mirror/reflector for the system. The optical axis (36) of the system (10) is normal to the center of the folding mirror (24). The vertex of the convex mirror (20) and the vertex of the concave mirror (22) lie along the optical axis (36). A distortion corrector (32) and filter (34) are positioned in front of the image plane (30) of the system (10).

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