Patent ID: 11867919
Assignee: PANASONIC HOLDINGS CORPORATION
Field: Optics (Instruments)
Classification: CPC G  B  H | IPC G  H

Claim 3:
4. A beam coupling device comprising:
a light source that includes a plurality of light emitters capable of resonating at different wavelengths from each other, to emit a plurality of light beams from the light emitters respectively;
the optical unit according to claim 1, to guide each of the light beams from the light source; and
a diffraction element arranged to diffract each of the light beams incident from the light source via the optical unit for coupling the plurality of light beams that resonate at different wavelengths, wherein
the optical unit is arranged with the diffraction element facing the end face in which the pitch of the lens portion is smaller among pitches in the both end faces.