| 摘要 |
<p>Provided is a light transmitting/receiving device which can accurately detect light entered from external. On a front plane (27a) of a light transmitting member (27) in the light transmitting/receiving device (1), a groove (28) is formed. The groove passes between an opening section (22) and a pin hole (23) when viewed from the front, and opens on the side plane of the light transmitting member (27). A light blocking resin section (3) reaches inside the groove (28). Thus, even when a part of light outputted from an LD (9) is multiply reflected in the light transmitting member (27), the light blocking resin section (3) in the groove (28) prevents the multiply reflected light from reaching a PD (12) as unnecessary light. Therefore, a noise current due to such unnecessary light is prevented from being detected, and the light entered from external can be accurately detected.</p> |
