Title:
【発明の名称】可変焦点距離眼鏡用作動機構
Document Type and Number:
Japanese Patent JPH09509755
Kind Code:
A
Abstract:
Variable power eyeglasses of many shapes can be manufactured having a frame, a pair of lens assemblies and a linear actuation mechanism. Each lens assembly includes: a rigid substrate; a membrane support spaced from the rigid substrate; a flexible seal extending between the rigid substrate and the membrane support, where the flexible seal acts as a hinge at a first section and acts as a spring by allowing relative motion between the rigid substrate and the membrane support at a second section; a transparent elastomeric membrane sealed around a periphery to the membrane support; and a transparent liquid filling the space between the rigid substrate and the membrane forming a liquid lens. The linear actuation mechanism causes relative motion between the membrane and the rigid substrate so that both optical and prismatic power of the liquid lens changes by varying a force applied to the flexible sealing means at the second section. The linear actuation mechanism is positioned within a plane of the lens assemblies and includes: a pair of sliders connected via a wire passing through a tube mounted onto the frame; a pair of cams with one of the cams attached to each end of the pair of sliders; and a pair of cam followers responsive to the cams causing relative motion in response to movement of the sliders.
Inventors:
Cronin, David Buoy.
Donald, Williamson
Donald, Williamson
Application Number:
JP51255796A
Publication Date:
September 30, 1997
Filing Date:
July 28, 1995
Export Citation:
Assignee:
Polaroid Corporation
International Classes:
G02C7/06; G02C7/08; (IPC1-7): G02C7/08; G02C7/06
Attorney, Agent or Firm:
Akira Asamura (3 outside)