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Liquid-filled variable focus lens with band actuator

  • US 5,999,328 A
  • Filed: 11/08/1994
  • Issued: 12/07/1999
  • Est. Priority Date: 11/08/1994
  • Status: Expired due to Fees
First Claim
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1. In a variable focus lens of the type having a lens assembly comprising a rigid lens, a distensible membrane spaced from said rigid lens, and liquid filling the space between said rigid lens and said distensible membrane, where the focal length of said variable focus lens is varied by changing the spacing between said rigid lens and said distensible membrane, an actuation system which comprises:

  • a finger operated positioner;

    a flexible elongated operating member moveable lengthwise responsive to movement of said finger operated positioner;

    a supporting structure for said flexible elongated operating member for preventing compressive buckling; and

    actuator means responsive to movement of said elongated operating member for causing said spacing between said rigid lens and said distensible membrane to change.

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