| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem of usage of light being poor because a torus part is present, where no light exits or no incident light reaches a light-receiving element, related to an optical device for an optical element, where with a light reflection member comprising a concave surface, a light-emitting element and a light-receiving element are placed around the center of the light reflection member and the concave part is sealed with a mold resin. SOLUTION: A lens is made to be larger which is provided in a direct outgoing region on the outgoing side of light or in a direct incidence region on the incidence side of light. At the extra part, an interface with an air is provided or a second light reflecting member is provided, thus a torus region where no light exits or it is not received, or is lost from a light-receiving element is eliminated. |
