Optical system for TTL automatic focusing video camera

摘要

An optical system for a TTL automatic focusing video camera in which a beam splitter employed in the optical system is formed of at least two totally reflecting surfaces disposed on opposite sides of an optical axis of a main image pickup lens forming an angle with respect thereto of 90 DEG in the lateral direction and 45 DEG in the longitudinal direction., An abberation correction lens is arranged on opposite sides of the optical axis form the main image pickup lens. A light beam reflected and converged by a totally reflecting surface provided at a rear of the aberration correction lens is allowed to pass by the totally reflecting surfaces of the beam splitter to reach the automatic focusing sensor.