Patent ID: 8072667

Claim:
An optical scanning device comprising: a light source that emits a laser beam, the light source including a plurality of light-emitting units that are two-dimensionally arranged; an optical element that splits the laser beam emitted from the light source into first and second split light beams; a deflecting unit that deflects the split light beams in a main-scanning direction, and wherein the optical element is arranged on an optical path from the light source to the deflecting unit; a scanning imaging unit that focuses the split light beams deflected by the deflecting unit on respective first and second scanning surfaces and scans the scanning surfaces with respective focused laser beams; and first and second integrated circuit packages that each include a light receiving unit that detects optical intensity of the respective laser beam and a synchronous timing in the main-scanning direction, and wherein the light receiving units each include photodetecting elements and a substrate on which the photodetecting elements are arranged in the main-scanning direction, and wherein the first and second light receiving units detect the first and second split light beams, respectively; and wherein the light receiving units further detect sub-scanning positions of the respective laser beams; and wherein the photodetecting elements include a common photodetecting element that functions as a first photodetecting element for detecting the optical intensity of the respective laser beam, a second photodetecting element for detecting the synchronous timing, and a part of a third photodetecting element for detecting the sub-scanning position.