Patent ID: 8731019

Claim:
A laser module comprising: a laser light source that emits a laser light; and a lens that is bonded to a surface of a substrate by a resin adhesive, the lens collimating or focusing the laser light emitted from the laser light source, wherein the resin adhesive includes a filler whose main component is an inorganic material, and a height h of the filler in a direction normal to the surface of the substrate satisfies h ≤ d 2 ⁢ sin ⁢ ⁢ θ max , where d is width of a bonding surface of the lens in a direction of an optical axis of the laser light and θ max is tolerable inclination angle of the lens, the inclination angle of the lens being defined as an angle formed between the surface of the substrate and the bonding surface of the lens.