Birch, Stewart, Kolasch & Birch, LLP
Zoom lens for digital image capturing apparatus
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.
Industrial Technology Research Institute
G G
G02B G02B
inventional inventional
Gung-Hsuan Chir-Weei
Ho Chang