Surface-curved optical element adapted for emergence and inciden

Details Surface-curved optical element adapted for emergence and inciden Surface-curved optical element adapted for emergence and inciden

1995-04-07

1997-02-04

Epps, Georgia Y.

Optical: systems and elements

Lens

Including a nonspherical surface

359708, 359718, G02B 302, G02B 1318

Patent

active

056004923

ABSTRACT:
The invention relates to an optical element being conveniently useful, for example as an external cover of transmitter and/or receiver for optical communication and more particularly to a surface-curved optical element comprising a transparent body of a refractive index n having a pair of boundary surfaces defined in their cross-section by the corresponding pair of ellipsoidal curves of an eccentricity 1
. The boundary surfaces of this surface-curved optical element are configured so that they should have their focal points aligned with one another on a straight line and their focal points which are remote from vertices of the respective ellipsoidal surfaces corresponding to the apsides of the respective ellipsoidal curves should be coincident with each other, whereby parallel light rays entering the surface-curved optical element should emerge from this in the form of the parallel light rays without any disturbance.

REFERENCES:
patent: 4655555 (1987-04-01), Machler et al.
patent: 5285318 (1994-02-01), Gleckman
patent: 5343325 (1994-08-01), Yamakawa

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