| 摘要 |
<p>A disclosed projection optical system for projecting and forming an enlarged image of an image displayed in a planar manner as an object (1) includes: a lens system (I-IV,4) including, from an object side, at least a lens group providing telecentricity to an object space side, a lens group controlling divergence of angles of view, a diaphragm (3), a lens group converging the angles of view, and a lens group converging and subsequently enlarging the angles of view; and a catoptric system disposed on an image side relative to the lens system and including a mirror (4) having negative power. Each lens group (I-IV) of the lens system and the mirror having negative power share an optical axis and the optical axis is shifted relative to a center of an object surface.</p> |
