Patent ID: 6937406

Claim:
An optical module comprising: a substrate provided with a groove being formed in a surface thereof to extend from a first end of the substrate toward a second end of the substrate opposite from the first end of the substrate but not to extend to the second end of the substrate, the groove having a first slope surface crossing the surface of the substrate at an obtuse angle and a second slope surface facing to the first slope surface and crossing the surface of the substrate at an obtuse angle; an optical element mounted on the surface of the substrate between the second end of the substrate and an end of the groove; and a lens being put in the groove; wherein an adhesive is applied to a portion of at least the second slope surface but not to the first slope surface of the groove at all so as to fix the lens in the groove in a structure in which the lens is in contact with or in the proximity of the first slope surface and the second slope surface, and wherein the lens is adhered to the portion of at least the second slope surface by the adhesive while the lens is not adhered to the first slope surface at all.