Catoptric lens arrangement

Details Catoptric lens arrangement Catoptric lens arrangement

1976-07-26

1977-09-27

Sacher, Paul A.

350294, 350299, G02B 1706, G02B 510

Patent

active

040507750

ABSTRACT:
A family of catoptric lens arrangements is provided for focusing a maximum mount of light from an omnidirectional source into a parallel or conical beam. A rear spherical-curvature reflector is inserted into a conventional forward spherical plus rear parabolic reflector arrangement, with its center of curvature and the light source both at the focal point of the parabolic reflector. In addition, a forward collimating lens is substituted for the central portion of the forward reflector. The theoretical 100% efficiency achieved by this arrangement is independent of the diameters of the forward and rear reflectors provided, of course, that the positions and curvatures are suitably compensated.

REFERENCES:
patent: 3796886 (1974-03-01), Freeman

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