Patent ID: 7529031

Claim:
An image pickup system comprising an image pickup device, an image display device including a display screen for displaying an image, a controller for converting image information obtained from said image pickup device into a signal that enables said image information to be formed on said image display device, and a viewing optical system for guiding an image displayed on said display device to a viewer's eye, wherein: said viewing optical system consists of, in order from said image pickup device side, a negative single-lens component composed of one negative lens element and a positive single-lens component composed of one positive lens element, said negative lens element is a double-concave lens element, said positive lens element is a double-convex lens element, of said negative lens element and said positive lens element, only said positive lens element has an aspheric surface, a light beam from said image display device is guided by refraction alone to said viewer's eye, and the following condition (2) is satisfied: 1.0 <a/c (2) where a is a the distance from the display screen of said image display device to the surface, nearest to the image display device side, of said viewing optical system, and c is a length of a short side of the display screen of said image display device.