Patent ID: 7206135

Claim:
An image observing apparatus comprising: two light sources for right and left eyes; a scanning mirror upon which light beams from said two light sources are incident in common; and two optical systems, for the right and left eyes, leading the light beams emitted from said two light sources and deflected by said scanning mirror to the right and left eyes of an observer, wherein the light beams emitted respectively from the two light sources are deflected by said scanning mirror to scan predetermined surfaces with the light beams and thereby respectively form two-dimensional images for the right and left eyes on the predetermined surfaces, central field angle principal rays emitted respectively from said two light sources and reflected by said scanning mirror, exist on the same plane, and the following condition is satisfied: 5°<θ<80°, where θ represents an angle made by said scanning mirror in a reference state and by a surface vertical to the central field angle principal rays emerging from said two optical systems.