Head-mounted display apparatus comprising a rotationally asymmet

Details Head-mounted display apparatus comprising a rotationally asymmet Head-mounted display apparatus comprising a rotationally asymmet

1996-04-23

1999-09-28

Epps, Georgia

Optical: systems and elements

Single channel simultaneously to or from plural channels

By partial reflection at beam splitting or combining surface

359633, 359631, G02B 2714

Patent

active

059597801

ABSTRACT:
A head-mounted image display apparatus capable of providing an observation image which is clear and has minimal distortion even at a wide field angle. The apparatus has an image display device (6), and an ocular optical system (7) for leading an image formed by the image display device (6) to an observer's eyeball position without forming an intermediate image so that the image can be observed as a virtual image. The ocular optical system (7) has at least one reflecting surface (4) having reflecting action. The at least one reflecting surface (4) has a surface configuration defined by a plane-symmetry three-dimensional surface which has no axis of rotational symmetry in the surface nor out of the surface, and which has only one plane of symmetry.

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Patent Abstracts of Japan vol. 096, No. 004, 30 Apr. 1996 & JP 07 325266 A (Olympus Optical Co Ltd), 12 Dec. 1995.
Droessler J G et al: "Titled Cat Helmet-Mounted Display" Optical Engineering, vol. 29, No. 8, 1 Aug. 1990, pp. 849-854, XP000141198.

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