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Variable-focus lens and method of manufacturing the same

A lens and focal length technology, applied in the direction of lens, instrument, installation, etc., can solve the problems of complicated lens manufacturing

Inactive Publication Date: 2006-12-27
VARIOPTIC SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Furthermore, the manufacture of the "S" shaped corrugations 23, 36 requires a dedicated stamping step which complicates the manufacture of the lens

Method used

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  • Variable-focus lens and method of manufacturing the same
  • Variable-focus lens and method of manufacturing the same
  • Variable-focus lens and method of manufacturing the same

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Embodiment Construction

[0024] For the sake of clarity, the same reference numerals are used to designate the same elements in the various figures.

[0025] The invention involves the intentional introduction of a volume of gas into contact with one of the liquids contained in the lens, but taking care to prevent said volume of gas from being present in the area through which light passes. Restricting means are used to prevent the volume of gas from moving into the light path. When the temperature changes, the liquid contained in the lens expands, and this expansion is compensated by said volume of gas, which is very compressible in nature, thereby limiting the variation of the internal pressure of the lens. The gas may be, for example, air, an inert gas or a mixture of several inert gases, or, alternatively or in combination, the vapor of one of the liquids contained in the lens.

[0026] According to the invention, said volume of gas may comprise, for example, one or more gas bubbles contained in ...

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Abstract

The invention relates to a variable-focus lens (60) for focussing light rays in light paths passing through the lens along an optical axis (Delta). The lens comprises an arrangement of first and second immiscible liquids (67, 68) that have different refractive indices and are in contact over a moveable refractive optical interface (69), a volume of gas (72) in contact with one of said liquids, and a retention measure (70, 74) for keeping the volume of gas away from the light paths of the light rays passing through the lens for focussing.

Description

technical field [0001] The present invention relates to a variable focal length lens, in particular to a lens which utilizes electrowetting (electrowetting) to deform a certain amount of liquid (droplet). Background technique [0002] A variable focal length lens generally includes an enclosure defined by two transparent windows containing at least two immiscible liquids with different refractive indices. The two liquids are in contact at a movable refractive interface through which light rays received by the lens pass. Liquid lenses include systems that use electrowetting to deform a movable refractive interface, thereby changing the optical power of the lens. [0003] The housing of such lenses is usually constructed as a rigid structure. The pressure of the liquid in the housing may increase significantly, for example during assembly operations of the housing constituent elements, or when the temperature of the lens liquid, which has a higher expansion coefficient than ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B3/14
CPCG02B7/008G02B26/005G02B26/004G02B3/14G02B3/12
Inventor 布鲁诺·贝尔热耶罗迈·珀瑟马蒂尔·马亚尔皮埃尔·克雷恩
Owner VARIOPTIC SA
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