Variable focus elastomeric lens system

Details Variable focus elastomeric lens system Variable focus elastomeric lens system

1981-08-17

1985-04-30

Corbin, John K.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

350437, 351168, G02B 310, G02B 1500, G02C 708

Patent

active

045140480

ABSTRACT:
A variable focus lens system comprising an elastomeric lens structured to undergo shape changes and corresponding focal length changes in a continuous manner over a predetermined range in response to variations in a tensile stress uniformly distributed around the peripheral edges of the lens element. The lens element is preferably structured of silicon rubber materials which are molded around an extensible and contractable annular coil spring arrangement which is utilized to apply the required variable tensile stress.

REFERENCES:
patent: 60109 (1866-11-01), Woodward
patent: 504890 (1893-09-01), Ohmart
patent: 708365 (1902-09-01), Kliegl et al.
patent: 1269422 (1918-06-01), Gordon
patent: 1955690 (1934-04-01), Spill
patent: 2165078 (1939-07-01), Toulon
patent: 2269905 (1942-01-01), Graham
patent: 2300251 (1942-10-01), Flint
patent: 3161718 (1964-12-01), DeLuca
Caudell et al., "Active Optics with RTV Silicone Rubber", SPIE, vol. 115, Advances in Replicated & Plastic Optics, pp. 18-24.

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