Invention Grant
US08275014B2 Surface-emitting laser element, surface-emitting laser array, optical scanning device, and image forming apparatus 有权
表面发射激光元件,表面发射激光器阵列,光学扫描装置和成像装置

  • Patent Title: Surface-emitting laser element, surface-emitting laser array, optical scanning device, and image forming apparatus
  • Patent Title (中): 表面发射激光元件,表面发射激光器阵列,光学扫描装置和成像装置
  • Application No.: US12952284
    Application Date: 2010-11-23
  • Publication No.: US08275014B2
    Publication Date: 2012-09-25
  • Inventor: Katsunari Hanaoka
  • Applicant: Katsunari Hanaoka
  • Applicant Address: JP Tokyo
  • Assignee: Ricoh Company, Ltd.
  • Current Assignee: Ricoh Company, Ltd.
  • Current Assignee Address: JP Tokyo
  • Agency: Cooper & Dunham LLP
  • Priority: JP2009-268226 20091126; JP2010-156453 20100709
  • Main IPC: H01S5/00
  • IPC: H01S5/00
Surface-emitting laser element, surface-emitting laser array, optical scanning device, and image forming apparatus
Abstract:
A surface-emitting laser element includes a substrate; a plurality of semiconductor layers laminated on the substrate, the plural semiconductor layers including a resonator structural body including an active layer and semiconductor multilayer film reflection mirrors having the resonator structural body sandwiched therebetween; an electrode provided in such a manner as to surround a emitting region on a surface of the surface-emitting laser element from which light is emitted; and a dielectric film provided in the emitting region such that a reflection ratio of a peripheral part of the emitting region is different from a reflection ratio of a center part of the emitting region. Edge portions that are near edges of the dielectric film are tilted with respect to the surface.
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