Invention Grant
US08896929B2 Projection zoom lens and projection type display device 有权
投影变焦镜头和投影型显示装置

Projection zoom lens and projection type display device
Abstract:
A negative first lens group, a positive second lens group, a negative third lens group, a positive fourth lens group, a negative fifth lens group, and a positive sixth lens group are disposed in this order from the magnification side. The reduction side is made telecentric. While changing magnification, the second lens group through the fifth lens group are moved, and the first lens group and the sixth lens group are fixed. Predetermined conditional expressions are satisfied.
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