Variable focal length lens

Details Variable focal length lens Variable focal length lens

1986-05-16

1988-07-19

Punter, William H.

350387, 350393, G02F 103, G02F 129

Patent

active

047580704

ABSTRACT:
A variable focal length lens has a lens system having optical anisotropy, a polarization plane control device for changing the direction of polarization of a light beam on the lens system. A detector is provided for detecting the direction of polarization of the light beam emergent from the lens or the polarization plane control device which, by a signal, controls the polarization plane control device so that only a light beam of desired direction of polarization emerges from the lens.

REFERENCES:
patent: 3520592 (1970-07-01), Leib et al.
patent: 3532891 (1970-10-01), Simmons et al.
patent: 3658409 (1972-04-01), Shimbo et al.
patent: 3819939 (1974-06-01), Rahiff
Feldman, A., "Bistable Optical Systems Based on a Pockels Cell", Optics Letters, 4-1979, pp. 115-117.
Kubota et al., "Electro-Optical Polarisation Control on Single-Mode Optical Fibres" Electronics Letts. 7-1980, p. 573.

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