Zoom lens for digital image capturing apparatus
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United States of America Patent
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Apr 18, 2006
Grant Date -
Feb 16, 2006
app pub date -
Nov 23, 2004
filing date -
Aug 13, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A zoom lens for digital image capturing apparatus is a shared lens of digital static cameras and digital video cameras. It contains three lens groups. From the object plane to the image plane, the first lens group has a negative refractive power, the second lens group has a positive refractive power, and the third lens group has a positive refractive power. As the focal length of the zoom lens changes from long (telescope) to short (wide-angle), the second lens group moves from the object plane to the image plane. The third lens group and the first lens group move with the second lens group.
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