| 摘要 |
PROBLEM TO BE SOLVED: To provide a catadioptric lens system with a small size, a light weight, and a long focal length, and an image pickup unit including such a catadioptric lens system.SOLUTION: A catadioptric lens system includes: a first lens group GR1 having positive refractive power; a second lens group GR2 having positive refractive power; and a third lens group GR3 having negative refractive power, the first to third lens groups being provided in order in a direction of light entering. The first lens group GR1 includes a concave mirror L12A and a convex mirror L13. |
