Patent ID: 9726835
Date: 2017-08-08
CPC Classifications: G02B

Claim:
1. An optical receptacle disposed between a photoelectric conversion device and an optical transmission member, the photoelectric conversion device including a light emitting element and a detection device configured to detect monitor light for monitoring light emitted from the light emitting element, the light emitting element and the detection device being mounted on a substrate, the optical receptacle being configured to optically couple the light emitting element and an end surface of the optical transmission member, the optical receptacle comprising: a first surface including a first optical surface on which light emitted from the light emitting element is incident, and a third optical surface configured to emit the monitor light toward the detection device; a reflecting surface configured to reflect light incident on the first optical surface in a direction along the substrate; a light separation part composed of a part of an internal surface of a recess disposed on a light path of light reflected by the reflecting surface, the light separation part being configured to separate the light reflected by the reflecting surface into the monitor light directed toward the third optical surface and signal light directed toward the end surface of the optical transmission member; a transmission surface composed of a part of the internal surface of the recess, and configured to allow the signal light separated by the light separation part to pass therethrough through an internal space of the recess; a third surface including a second optical surface configured to emit the signal light passed through the transmission surface toward the end surface of the optical transmission member; and a reflection monitor light avoiding part disposed on a light path between the light separation part and the detection device, and configured to guide reflection monitor light such that the reflection monitor light does not return to the light emitting element, the reflection monitor light being the monitor light which reaches the detection device and is reflected by a detection surface of the detection device, wherein: the light separation part includes: