Optical coupling element assembly, optical engine, image display device, xr glasses, and method for manufacturing optical coupling element assembly

An optical coupling element assembly comprising:

• a plurality of laser light sources mounted on a subcarrier;
• a lens unit in which a plurality of lenses are arranged side by side to convert a plurality of laser light rays output from the plurality of laser light sources into mutually parallel collimated rays;
• and
• a prism unit formed by integrally combining a plurality of prisms to which a plurality of laser light rays that have passed through the lens unit are respectively input,
• wherein a bonding surface of the subcarrier and a first bonding surface of the lens unit are bonded to each other,
• a second bonding surface of the lens unit and a bonding surface of the prism unit are bonded to each other, and
• each of the plurality of prisms includes an inclined surface reflecting and/or transmitting the laser light ray, the inclined surfaces are arranged parallel to each other such that the plurality of laser light rays reflected and/or transmitted are coupled into a single laser light ray, and the coupled laser light ray is output from an exit of the prism unit.