Patent Number: 8,879,133

Title: Multi-beam light source device, optical scanning device, and image forming apparatus

Abstract: A multi-beam light source device includes a vertical cavity surface emitting laser device having monolithically fabricated multiple light sources; an optical sensor to monitor an output of beams of light emitted from the vertical cavity surface emitting laser; a printed circuit board on which a driving circuit is formed to drive the vertical cavity surface emitting laser device based on monitoring signals from the optical sensor; a coupling lens to change the beams of light emitted from the vertical cavity surface emitting laser device to a predetermined state; a transparent board on which a wiring pattern is formed to wire an electrode of the vertical cavity surface emitting laser device and a terminal of the driving circuit; and a holding unit to integrally hold the vertical cavity surface emitting laser device, the optical sensor, the printed circuit board, the coupling device, and the transparent board.

Inventors: Nakajima; Tomohiro (Kanagawa, JP)

Assignee: Ricoh Company, Ltd.

International Classification: G02B 26/08 (20060101)

Expiration Date: 2019-11-04 0:00:00