Title:
HEAD MOUNTED DISPLAY DEVICE
Document Type and Number:
Japanese Patent JP3245585
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a head mounted display device equipped with a compact enlarging optical system capable of compensating the most off-axis distortion aberration to about 5% in spite of such a wide viewing angle that a horizontal viewing angle is ≥30°.
SOLUTION: This head mounted display device includes a display element D displaying the contents of information and an optical system enlarging and projecting the displayed contents as a virtual image to an eyeball without forming them into an image in an optical path. In the device, the optical system is provided with at least a prism member P, and the member P is constituted to include an incident surface arranged on the element D side, a reflection surface R whose concave surface faces to a prism medium side and which gives power to luminous flux, and a transmission and reflection surface used both for the transmitting action and the reflecting action of the luminous flux and arranged at a position where the optical path is folded back in order to realize compaction between the surface R and this surface. The incident surface of the member P is constituted of an aspherical surface.
Inventors:
KONUMA OSAMU
Application Number:
JP2000118017A
Publication Date:
January 15, 2002
Filing Date:
April 27, 1993
Export Citation:
Assignee:
OLYMPUS OPTICAL CO
International Classes:
G02B17/08; G02B27/02; G03B21/28; G09F9/00; H04N5/64; (IPC1-7): G02B27/02; G02B17/08; G03B21/28; G09F9/00; H04N5/64
Domestic Patent References:
| JP3191389A |
Other References:
【文献】米国特許4269476(US,A)
Attorney, Agent or Firm:
Hiroshi Nirazawa (7 outside)