| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical element that can be surely mounted in a package by irradiating ultraviolet light in the optical axis direction of a solid-state image pickup device although it has a cutoff layer capable of surely blocking the optical path of light causing ghost or the like.SOLUTION: An optical element used for an imaging device containing a solid-state image pickup device has a transparent board having, at both the front and back surfaces thereof, an incidence face to which light directing to the solid-state image pickup device is incident, an emission face through which light is transmitted and emitted to the solid-state image pickup device, a first light transmissible portion which is formed at the center portion of the transparent board and transmits a part of light therethrough, a light blocking portion which is formed on at least one face of the incidence face and the emission face so as to surround the outer periphery of the first light transmissible portion in a frame-shape, and blocks a part of the light, and a second light transmissible portion which is formed at the edge portion of the transparent board so as to surround the outer periphery of the light blocking portion and transmits a part of light therethrough. |
