Zoom lens and image projection apparatus
AssigneeCanon Kabushiki Kaisha
InventorMakoto Takahashi
Life of this patent
Estimating the term…
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AssigneeCanon Kabushiki Kaisha
InventorMakoto Takahashi
Estimating the term…
The zoom lens (1) includes an aperture stop (ST1), at least three front side movable lens units (B2 to B4) disposed on an enlargement conjugate side further than the aperture stop and movable for zooming, and a front side fixed lens unit (B1) disposed on the enlargement conjugate side further than the at least three front side movable lens units and fixed for the zooming. The at least three front side movable lens units include two first front side movable lens units (B2 and B3) movable to the enlargement conjugate side for zooming from a wide-angle end to a telephoto end, and a second front side movable lens unit (B4) disposed on the reduction conjugate side further than the first front side movable lens units and movable to the reduction conjugate side for the zooming from the wide-angle end to the telephoto end.
A zoom lens comprising:
An image projection apparatus comprising:
Dependencies are inferred from the claim text.