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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Main Authors | , |
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Format | Patent |
Language | English |
Published |
21.03.2006
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Edition | 7 |
Subjects | |
Online Access | Get full text |
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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. |
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Bibliography: | Application Number: TW20040138025 |