| 摘要 |
PROBLEM TO BE SOLVED: To propose a compact optical system having a bright f-number, and consisting of only one sheet of an aspherical mirror, and also inheriting technique for mitigating the angle of an incident light beam on a screen by compositing a dioptric lens system and a catoptric system in order to provide an optical system for a thinned large-screen rear projection type monitor. SOLUTION: In this cata-dioptric imaging optical system for a rear projection type monitor, one aspherical reflection mirror in addition to the dioptric lens system and further a spherical reflection mirror are installed just before the screen. |
