Projection lens, image projection apparatus and optical...

Details Projection lens, image projection apparatus and optical... Projection lens, image projection apparatus and optical...

2008-06-27

2010-11-09

Lester, Evelyn A. (Department: 2873)

Optical: systems and elements

Image stabilization

By movable refractive structure

C359S683000, C359S813000

Reexamination Certificate

active

07830604

ABSTRACT:
The projection lens that projects a light flux from an object onto a projection surface. The projection lens includes a negative lens unit having a negative optical power, and a correction mechanism that tilts the negative lens unit with respect to an optical axis of the projection lens such that field tilt is generated in a direction opposite to a direction of field curvature generated at the projection surface. The projection lens reduces the generation of field curvature and its variation using a simple configuration.

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European Patent Office Communication with partial European search report concerning application 08011507-2217.4, Sep. 23, 2008.
European Search Report issued on Jan. 29, 2009 for corresponding European Patent Application No. 08011507.4.

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