A - Human Necessities – 61 – F
Patent
A - Human Necessities
61
F
A61F 2/16 (2006.01) G02B 3/14 (2006.01) G02B 26/00 (2006.01) G02C 7/04 (2006.01)
Patent
CA 2072635
2072635 9205750 PCTABS00011 A variable focus lens apparatus (32) includes a transparent, generally circular envelope (34), a transparent gel (36) having a relatively high resistance to flow encased in the envelope, and a plurality of light refractive particles (38) suspended in a predetermined orientation in the gel. When an external force field (44) is applied to the lens apparatus, the selectively focusable particles are responsive for changing to a new orientation with respect to said envelope for selectively adjusting characteristics of the lens apparatus including at least one of the characteristics of power and astigmatism correction, whereby upon removal of the external force, the particles remain in the new orientation within the gel. A control system (80) for controlling at least one of the strength and duration of the force field applied to the particles is connected to coils (58, 60) and a power supply (54) for generating the force field.
Wiley Robert G.
Macrae & Co.
Wiley Robert G.
LandOfFree
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