Auto-focusing optical system for camera module

Details Auto-focusing optical system for camera module Auto-focusing optical system for camera module

2006-11-28

2006-11-28

Sugarman, Scott J. (Department: 2873)

Optical: systems and elements

Lens

Fluid

C359S716000, C359S753000

Reexamination Certificate

active

07142368

ABSTRACT:
The present invention relates to an auto-focusing optical system, and more particularly, to an auto-focusing optical system for a camera module, capable of obtaining a high resolution in a small size using a liquid lens whose curvature is varied depending on an applied voltage. In the auto-focusing optical system, a first lens group has a liquid lens whose curvature is varied and having a plus optical power, a second lens group has a plus optical power, and a third lens group has a minus optical power. Thanks to an auto-focusing optical system including a liquid lens according to the present invention, not only a manufacturing in a small size is possibly realized but also a high resolution can be obtained, and power consumption is small.

REFERENCES:
patent: 6417972 (2002-07-01), Chung et al.
patent: 2001/0017985 (2001-08-01), Tsuboi et al
patent: 2006/0028734 (2006-02-01), Kuiper et al.
patent: WO 03/069380 (2003-08-01), None
patent: 2004/038480 (2004-05-01), None
patent: 2005/088354 (2005-09-01), None
S. Kuiper & B. J. W. Hendriks, Variable-focus Liquid Lens for Miniature Cameras, Applied Physics Letters, Aug. 16, 2004, vol. 85, No. 7, pp. 1128-1130.
Office Action from the German Patent Office mailed Apr. 26, 2006 with English Translation.

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