(19) United States
(12) Patent Application Publication (io) Pub. No.: US 2004/0140949 Al
Takagi (43) Pub. Date: Jul. 22,2004
(54) IMAGE OBSERVATION SYSTEM
(75) Inventor: Akinari Takagi, Utsunomiya-shi (JP) Correspondence Address:
FITZPATRICK CELLA HARPER & SCINTO
30 ROCKEFELLER PLAZA
NEW YORK, NY 10112 (US)
(73) Assignee: CANON KABUSHIKI KAISHA, Tokyo (JP)
(21) Appl. No.: 10/722,444
(22) Filed: Nov. 28, 2003
(30) Foreign Application Priority Data
Nov. 29, 2002 (JP) 347914/2002(PAT.
(51) Int. CI.7 G09G 5/00
(52) U.S. C I 345/8
Disclosed is an image observation system including a pair ol image observation devices each having i) an image pickup device, ii) an image pickup optical system for directing light rays from an outside world to the image pickup device, iii) a display device for displaying an outside world image obtained by the image pickup system, and iv) a display optical system for directing light from the display device to an observing eye, wherein the optical axis of the image pickup system and the optical axis of the display system are disposed coaxially, wherein the optical axes of the image pickup systems of the pair of image observation devices define a point of intersection, and wherein a focal plane being at a position conjugate with a surface of the image pickup device with respect to the image pickup optical system is disposed at a side of the intersection point of the optical axes of the image pickup systems, which side faces an observer, such that an outside world image obtained by the image pickup system can be displayed on the display device as a clear image without distortion, and an improved head-mount type image observation system can be accomplished.