Patent Number: 6,528,825

Title: Semiconductor emission apparatus

Abstract: Disclosed is a semiconductor emission apparatus capable of emitting only a unimodal beam by a simple configuration without designing materials. The size of a light-leading window provided in a shielding cover is set so as to shield Cherenkov, light generated in a semiconductor laser using a GaN substrate and hold it inside the apparatus. The optical path of Cherenkov light is represented by the conical face with the apex angle having the emitting direction of the beam from the semiconductor laser as an axis. The apex angle at this time is about from 20.degree. to 23.degree.. The light-leading window is to have the cross sectional form in the shielding cover of a conical face with the apex angle defined in the same manner, and the apex angle is to be 20.degree. or less. As a result, the beam pattern emitted from the light-leading window becomes unimodal.

Inventors: Yoshida; Hiroshi (Kanagawa, JP)

Assignee: Sony Corporation

International Classification: H01S 5/022 (20060101); H01S 5/00 (20060101); H01S 5/343 (20060101); H01S 5/323 (20060101); H01S 5/02 (20060101); H01L 033/00 ()

Expiration Date: 03/04/2020