Illumination system having an aspherical lens

Details Illumination system having an aspherical lens Illumination system having an aspherical lens

1992-06-22

1994-02-08

Arnold, Bruce Y.

Optical: systems and elements

Lens

Including a nonspherical surface

359708, 359869, G02B 302

Patent

active

052853187

ABSTRACT:
A lens system containing an aspherical portion enabling minimization of spherical aberration as well as the lens length. The lens system includes a conical lens portion providing total internal reflection of light within the lens system and an integrally attached aspherical lens portion. For light rays within a defined angular range of less than about .+-.24.degree., the light rays are focused on the exit aperture (for a concentrator) at a minimum lens length, l.

REFERENCES:
patent: 4114592 (1978-09-01), Winston
patent: 5001609 (1991-03-01), Gardner et al.
patent: 5005958 (1991-04-01), Winston et al.

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