Patent Number: 6,252,728

Title: Image display apparatus

Abstract: The invention relates to a slimmed-down, well weight-balanced image display apparatus which, while a wide angle of view is presented, ensures high resolving power and a large pupil diameter, and comprises a viewing optical system for viewing an image displayed on an image display device 3 and having generally positive refracting power. The viewing optical system comprises a relay optical element for forming a relay image 6 and an ocular optical element for forming an exit pupil 2 for guiding relay image 6 to an observer. The relay optical element comprises a prism member 5. The prism member 5 comprises an entrance surface 11, at least one reflecting surface 12 or 13, and an exit surface 14. The reflecting surface is constructed of a rotationally asymmetric surface capable of imparting power to a light beam and making correction for aberrations produced by decentration. The ocular optical element is constructed of a concave mirror 4 having a rotationally asymmetric surface capable of imparting power to a light beam and making correction for aberrations produced by decentration.

Inventors: Togino; Takayoshi (Koganei, JP)

Assignee: Olympus Optical Co., Ltd.

International Classification: G02B 17/08 (20060101); G02B 003/02 (); G02B 005/04 ()

Expiration Date: 06/26/2018