抄録
Optical properties of a single hyperboloid lens cut by a lathe were investigated. The lens has a characteristic of focusing the object image to a spherical surface up to an angle of incidence close to 90 degrees. After analyzing the optical properties including spot diagrams in a plane vertical to the principal ray on the surface, the lens was found to be very effective in viewing an object over a very wide angle and is therefore thought to be especially suitable for many fields of application where image and information is transmitted over a very wide field at a time. Practically it is possible to apply this lens as a sensor of robot's eye with a total field angle of almost 180 degrees.
