Zoom lens

Disclosed is a zoom lens which is formed in a small size and adaptable to a thin and portable device. The zoom lens has three lens groups arranged from the object plane to the image forming plane including: a first lens group with a negative power, a second lens group with a positive power, and a th...

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Bibliographic Details
Main Authors CHANG, CHIR-WEEI, WU, CHINGIN
Format Patent
LanguageEnglish
Published 21.03.2006
Edition7
Subjects
ACCESSORIES THEREFOR
APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES
APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM
CINEMATOGRAPHY
ELECTROGRAPHY
HOLOGRAPHY
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHOTOGRAPHY
PHYSICS
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Summary:Disclosed is a zoom lens which is formed in a small size and adaptable to a thin and portable device. The zoom lens has three lens groups arranged from the object plane to the image forming plane including: a first lens group with a negative power, a second lens group with a positive power, and a third lens group with a positive power. By controlling the ratio of the focal length of the second lens group and the focal length of the far end, image distortion may be controlled, and the total length of the lens may be reduced to shrink the size of the lens. Hence production costs can be reduced, which is important to mass production.
Bibliography:Application Number: TW20040138025