Light source unit

摘要

A light source unit includes a light source, a light source support to hold the light source, a fixing member which is attached to the light source support and includes a through-hole through which beams of light emitted from the light source pass, a lens holder inserted into the through-hole and attached to the fixing member by an adhesive; and a collimating lens to collimate the beams of light from the light source, wherein attachment surfaces of the adhesive for the lens holder has a tilted attachment surface tilted relative to the optical axis of the collimating lens.

主权项

1. A light source unit comprising:
a light source; a light source support to hold the light source; a fixing member attached to the light source support, having a through-hole through which beams of light emitted from the light source pass; a lens holder inserted into the through-hole and attached to the fixing member by an adhesive; and a collimating lens to collimate the beams of light from the light source, wherein attachment surfaces of the adhesive for the lens holder comprise a tilted attachment surface tilted relative to an optical axis of the collimating lens, wherein the fixing member comprises multiple injection portions to inject the adhesive to the tilted attachment surface, wherein the multiple injection portions are formed rotationally symmetric about the optical axis of the collimating lens when viewed from the optical axis, wherein the multiple injection portions are adjacent to the tilted attachment surface about a direction perpendicular to the optical axis direction of the collimating lens, and wherein an emitting surface of the collimating lens is located between an adhesive portion of the fixing member and the lens holder and the light source.