Patent ID: 7170687
Filing Date: 2007-01-30
Classification: G02B

Abstract:
1. A projection lens system that projects projection light from a light modulator side onto to a screen side, comprising: a first lens group disposed closest to the screen side, the first lens group including a first meniscus lens with negative refractive power that is positioned closest to the screen side and is convex on the screen side, a cemented lens that is positioned on the light modulator side, and a means for bending an optical path between the first meniscus lens and the cemented lens, the first lens group having an overall negative refractive power; and a second lens group with positive refractive power that is disposed on the light modulator side of the first lens group, the second lens group including a cemented lens that is closest to the screen side and at least two sets of cemented lens in addition to the cemented lens positioned closest to the screen side.