Variable optical element, optical unit, and image capturing...

Details Variable optical element, optical unit, and image capturing... Variable optical element, optical unit, and image capturing...

2005-08-23

2005-08-23

Mack, Ricky (Department: 2873)

Optical: systems and elements

Lens

Fluid

C359S819000

Reexamination Certificate

active

06934090

ABSTRACT:
A variable optical element is formed by a first liquid member, a second liquid member which is unsoluble in the first liquid member, a container which contains the first liquid member and the second liquid member, an index for positioning the variable optical element according to a predetermined reference. In the variable optical element, an interfacial shape between the first liquid and the second liquid surface varies according to a voltage which is applied to the liquid members, and the index is disposed such that a wave front aberration in the variable optical element should be minimum or fewer than a predetermined value under condition that the variable optical element is positioned according to the predetermined reference. By doing this, it is possible to restrict the wave front aberration which is caused by a gravity in the variable optical element, the optical unit, and the image capturing device.

REFERENCES:
patent: 5071229 (1991-12-01), Oaki et al.
patent: 5150234 (1992-09-01), Takahashi et al.
patent: 2002/0176148 (2002-11-01), Onuki et al.
patent: 2004/0228003 (2004-11-01), Takeyama et al.
patent: 2001-249203 (2001-09-01), None
patent: 2001-249261 (2001-09-01), None
Claude Gabay et al.:Dynamic study of a Varioptic variable focal lens, Current Developments in Lens Design and Optical Engineering III, Proceedings of SPIE vol. 4767, 2002.

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