Projection optical system and projection-type display apparatus

摘要

In a projection optical system that projects an image displayed on an image display device arranged on a reduction-side conjugate plane onto a magnification-side conjugate plane, as a magnified image, the projection optical system includes a refractive optical system and a reflective optical system having negative refractive power in this order from a reduction side. Further, the following conditional formula (1) is satisfied:
L/D+2ωmin/ωmax≦1.01  (1).

主权项

1. A projection optical system that projects an image displayed on an image display device arranged on a reduction-side conjugate plane onto a magnification-side conjugate plane, as a magnified image, the projection optical system comprising:
a refractive optical system; and a reflective optical system having negative refractive power in this order from a reduction side, wherein the following conditional formula (1) is satisfied:
L/D+2ωmin/ωmax≦1.01  (1), where L: a distance on an optical axis between the reflective optical system and the magnification-side conjugate plane, D: a diagonal length of the magnified image, ωmin: a minimum angle of incidence of a chief ray entering the magnification-side conjugate plane, and ωmax: a maximum angle of incidence of the chief ray entering the magnification-side conjugate plane.