Optical: systems and elements – Lens – With variable magnification
Reexamination Certificate
2007-09-04
2007-09-04
Thompson, Timothy (Department: 2873)
Optical: systems and elements
Lens
With variable magnification
C359S666000
Reexamination Certificate
active
11208577
ABSTRACT:
A multiple group variable focal length lens is provided. The lens has a first lens group including a variable power lens element and is positioned in a stationary manner along an optical axis. The lens also has a second lens group moveably positioned along the optical axis. The variable power lens element can be an electrically controllable liquid lens having a surface with a variable radius of curvature created by two liquids having distinct indices of refraction with one of the liquids having an index of refraction greater than 1.60. Alternatively or additionally, at least one of the liquids used in the liquid lens can include nanoscale particles.
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B. Berge and J. Peseux, “Variable Focal Lens Controlled by an External Voltage: An Application of Electrowetting”, Eur. Phys. J. E. 3, 2000, pp. 159-163.
Border John N.
Goosey, Jr. William T.
Sandford David W.
Eastman Kodak Company
Hasan M.
Thompson Timothy
Zimmerli William R.
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