Light source having a variable focal length

Details Light source having a variable focal length Light source having a variable focal length

2008-06-03

2008-06-03

Perkey, W. B. (Department: 2862)

Photography

Flash system responsive to focal length or distance

Illumination angle responds to focal length or distance

C396S175000, C359S666000, C257S100000

Reexamination Certificate

active

07382976

ABSTRACT:
A variable focal length light source is constructed using a tunable focus length lens which can be adjusted in synchronization to the focal length of a camera lens. In one embodiment, a deformable lens is used in conjunction with an LED light source to provide the tunable focal length required for a camera flash device.

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patent: 2004/0227838 (2004-11-01), Atarashi et al.
patent: 2006/0045501 (2006-03-01), Liang et al.
L. G. Commander, et al., Electrode Designs for Tunable Microlenses, Dept. of Electronic and Electrical Engineering, University College London, Torrington Place, London WC1E 7JE, World Wide Web:http://www.ee.uel.ac.us/˜odevices, pp. 1-6.
Opto & Laser Europe, Liquid Lenses Eye Commercial Breakthrough, Nov. 2003, pp. 1-4.

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