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Electro-optic lenses employing resistive electrodes

A resistive, electrode-based technology, applied in the field of diffracted light, can solve problems such as liquid crystal lenses that have not yet achieved commercial success

Inactive Publication Date: 2009-09-30
JOHNSON & JOHNSON VISION CARE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, liquid crystal lenses have not been commercially successful due to a number of factors, including manufacturing and operational challenges.

Method used

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  • Electro-optic lenses employing resistive electrodes
  • Electro-optic lenses employing resistive electrodes
  • Electro-optic lenses employing resistive electrodes

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Embodiment Construction

[0011] The following description gives non-limiting details of the construction of the electro-optic lens of the present invention. The present invention provides electro-optic lenses filled with liquid crystal material, wherein said liquid crystal material can rearrange in an electric field. The lens functions as a diffractive optical element (DOE). The DOE is the result of applying a voltage across a thin liquid crystal layer that responds by changing the director orientation field and producing a pattern of inhomogeneous refractive index that then results in a cell surface Inhomogeneous phase transfer function (phase-transmission-function, PTF). In the present invention, precise control of the PTF to produce the desired DOE is achieved by applying the desired voltage drop across the resistive patterned electrode set.

[0012] As used herein, a "resistive patterned electrode set" is one or more regions (electrodes) of conductive material that are electrically isolated from...

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Abstract

The present invention provides an electro-optic device comprising: a liquid crystal layer between a pair of opposing transparent substrates; a resistive patterned electrode set positioned between the liquid crystal layer and the inward-facing surface of the first transparent substrate; and a conductive layer between the liquid crystal layer and the inward-facing surface of the second transparent substrate, wherein the conductive layer and resistive patterned electrode set are electrically connected, and wherein said resistive patterned electrode set comprises one or more electrically-separated electrodes, wherein the desired voltage drop is applied across each electrode to provide the desired phase retardation profile.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application No. 60 / 824,325, filed September 1, 2006, which is incorporated herein by reference. Background of the invention [0001] The invention relates to the field of optical lenses. Ophthalmic lenses with fixed focusing properties have been widely used as eyeglasses and contact lenses to correct hyperopia and other conditions. Ophthalmic lenses with adjustable focusing power (ie, the focusing power is not static) are most useful. The adjustable focus capability provides external accommodation for the eye to bring objects of interest at different distances into focus. [0002] Adjustable focusing capabilities are available with mechanical zoom lenses. But the mechanical approach makes the glasses bulky and expensive. Different optical techniques have been explored in bifocal lenses to achieve both near and distance vision. For example, the user can have the l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13G02F1/07
CPCG02C7/083G02F2203/28G02F1/292G02F1/13439G02F1/134309G02B26/00G02F1/133H01L21/00
Inventor G·梅雷迪斯
Owner JOHNSON & JOHNSON VISION CARE INC