| 摘要 |
<p>The projection lens (PL) that projects a light flux from an object (IE) onto a projection surface (SN). The projection lens includes a negative lens unit (I) and a correction mechanism (CB) that tilts the negative lens unit with respect to the optical axis (AXL) of the projection lens such that field tilt (FT) is generated in a direction opposite to that of field curvature (FC) generated at the projection surface. The projection lens reduces the generation of field curvature and its variation using a simple configuration.</p> |
