Laser beam scanning device

A laser beam scanning device comprising mounting means for securely holding at fixed locations along an optical path of a laser beam, at least

• means for generating laser beams,
• means for collimating laser beams generated by said laser beam generating means,
• means for deflecting said laser beams and for scanning a predetermined region with said deflected laser beams,
• means for regulating the scanning speed of said laser beams so that said scanning speed will be substantially uniform in said predetermined region, and
• a photo-sensor for generating sync-signals and a reflective mirror for directing said laser beam toward said photo-sensor,
• wherein said mounting means comprises a unit base which is substantially rectangular and has four corners, one of said corners including an extension projecting outwardly from said one corner, said deflecting means being positioned on a central position of said unit base and said beam generating means being positioned on said extension, said regulating means being located along one side edge of said unit base adjacent said extension, said unit base being provided with a side wall extending from one of said corners adjacent said side edge to fixedly hold said photo-sensor thereon, said photo-sensor therefore being arranged outside said predetermined region, and a second extension projected from said side edge to fixedly hold said reflective mirror at the end of said predetermined region, so that said reflective mirror reflects said laser beam past said regulating means toward said photo-sensor,
• and, wherein said beam generating means, said collimating means, said deflecting means, said photo-sensor, said reflective mirror and said regulating means comprise an integrally connected unit.