Light emitting device

A light emitting device comprising:

• a first light-emitting element;
• a second light-emitting element;
• a photodetector having a light-receiving surface at an upper face thereof, the light-receiving surface comprising:
• a first light-receiving region configured to receive a portion of light emitted from the first light-emitting element, and
• a second light-receiving region configured to receive a portion of light emitted from the second light-emitting element;
• and
• at least one lens member having:
• at least one incident surface on which a portion of the light emitted from the first light-emitting element and/or a portion of the light emitted from the second light-emitting element are incident, and
• at least one exiting surface through which the portion of the light incident on the at least one incident surface is emitted;
• wherein, in a top view, the at least one lens member overlaps the upper face of the photodetector in part or in whole, and
• a first optical axis of the light emitted from the first light-emitting element extends parallel to the first light-receiving region and a second optical axis of the light emitted from the second light-emitting element extends parallel to the second light-receiving region.

A light emitting device comprising:

• a first light-emitting element;
• a second light-emitting element;
• a photodetector having a light-receiving surface at an upper face thereof, the light-receiving surface comprising:
• a first light-receiving region configured to receive a portion of light emitted from the first light-emitting element, and
• a second light-receiving region configured to receive a portion of light emitted from the second light-emitting element;
• and
• at least one lens member having:
• at least one incident surface on which a portion of the light emitted from the first light-emitting element and/or a portion of the light emitted from the second light-emitting element are incident, and
• at least one exiting surface through which the portion of the light incident on the at least one incident surface is emitted;
• wherein, in a top view, the at least one lens member overlaps the upper face of the photodetector in part or in whole, and
• the light emitted from the at least one exiting surface includes light that enters neither the first light-receiving region nor the second light-receiving region.