Projection lens, image projection apparatus and optical apparatus
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United States of America Patent
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Nov 9, 2010
Issued Date -
N/A
app pub date -
Jun 27, 2008
filing date -
Jul 3, 2007
priority date (Note) -
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status (Latency Note)
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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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