LIGHT RECEIVER FOR SPATIAL OPTICAL COMMUNICATION

摘要

PROBLEM TO BE SOLVED: To provide a light receiver for spatial optical communication that can improve light receiving and photoelectric conversion efficiency by improving a condensing rate by a condenser lens to a light-receiving element.SOLUTION: In a light receiver for spatial optical communication, a light-receiving element 4 is molded by transparent synthetic resin, and a condenser lens 2 is formed at the tip of the molding transparent synthetic resin. The light receiver receives light by condensing spatial light projected by superposing an information signal by the condenser lens 2. The light-receiving element 4 is placed nearly at the focal position of the condenser lens 2. The focal distance f of the condenser lens 2 is set such that it will be equal to or more than the lens diameter B of the condenser lens 2 and smaller than twice the lens diameter of the condenser lens 2.