Patent ID: 9074877
Filing Date: 2015-07-07
Classification: B60Q,F21S,F21V,G01B,H01S

Abstract:
1. A positional deviation detection unit comprising: detection means for detecting a relative positional relationship between an excitation light source, an optical member, and a light emitting portion in a light emitting device in which excitation light emitted from the excitation light source is collected at the light emitting portion via the optical member so that the light emitting portion is made to emit light; and determination means for comparing a detection result from the detection means with a reference relative positional relationship which is used as a reference for a relative positional relationship between the excitation light source, the optical member, and the light emitting portion, so as to determine whether or not there is a deviation of the relative positional relationship between the excitation light source, the optical member, and the light emitting portion when the detection means performs the detection, from the reference relative positional relationship.