Patent ID: 11971163
Assignee: USHIO DENKI KABUSHIKI KAISHA
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC F | IPC F

Claim 10:
11. The light source device according to claim 7, wherein the light source device satisfies the following formula:

0.1×D×(θ2/θ1)≤(ϕh−ϕp)/2≤D×(θ2/θ1), where D is a maximum diameter of a light-emitting surface of the LED element, θ1 is a maximum light-acceptance angle of each optical component provided in the first collimating optical system, θ2 is a maximum light-acceptance angle of each optical component provided in the second collimating optical system, and ϕh is the inner diameter of the through-hole, and ϕp is the outer diameter of the shaft section of the fixing member.