Projection lens and projection type display device

A projection lens that:

• projects image information displayed at a reduction-side conjugate position onto a magnification-side conjugate position;
• satisfies conditional expressions (1) and (2);
• and
• satisfies conditional expressions (3) and (4) when a single lens which includes a surface having the smallest effective beam diameter or a cemented lens is designated as a reference lens, a system substantially consisting of lenses disposed closer to a magnification-side than the reference lens is designated as a front group, and a system substantially consisting of lenses disposed closer to a reduction side than the reference lens is designated as a rear group:
• 75<2ω (1)
• βP<10 (2)
• |fM/fF|<2.0 (3), and
• |fM/fR|<2.0 (4),
• where
• ω:
• a half angle of view of the projection lens,
• βP:
• a pupil magnification (a reduction-side pupil diameter/a magnification-side pupil diameter),
• fM:
• the focal length of the reference lens,
• fF is the focal length of the front group, and
• fR is the focal length of the rear group.