Patent ID: 8253653

Claim:
An image observation system, comprising: a pair of image observation devices each having a) an image pickup system including i) an image pickup device and ii) an image pickup optical system for directing light rays from an outside world to said image pickup device, and b) a display system including iii) a display device for displaying an outside world image obtained by said image pickup system and iv) a display optical system for directing light from said display device to an observing eye, wherein, where an optical axis of said image pickup system is an axis containing a center of an entrance pupil of said image pickup optical system and a center of said image pickup device, and where an optical axis of said display system is an axis containing a center of an exit pupil of said display optical system and a center of said display device, the optical axis of the image pickup system and the optical axis of said display system are disposed coaxially, wherein the optical axes of said image pickup systems of said pair of image observation devices define a point of intersection, and wherein a focal plane, which is at a position conjugate with a surface of said image pickup device with respect to said image pickup optical systems, is optically disposed in an observing eye side of the intersection point of the optical axes of said image pickup systems.