Patent ID: 6195207
Filing Date: 2001-02-27
Classification: G02B

Abstract:
An optical apparatus comprising;an image-forming member that forms an image to be observed, andan ocular optical system provided to lead said image to an eyeball of an observer, whereinsaid ocular optical system includes, in order from an image side thereof, a third surface that forms an entrance surface, a first surface that forms both a reflecting surface and an exit surface, and a second surface that forms a reflecting surface, said first, second and third surfaces being integrally formed to face each other across a medium having a refractive index larger than 1,at least one of said first, second and third surfaces is formed from a rotationally asymmetric curved surface that corrects aberration produced by a decentered surface, anda chromatic aberration correcting member located between said image-forming member and the eyeball of said observer to correct chromatic aberration produced by said ocular optical system.