OPTICAL DEVICE, OPTICAL MEMBER AND IMAGE FORMING APPARATUS WITH THE SAME

摘要

An optical device includes a laser light source for outputting a laser beam; an optical member including an aspherical lens with an incident surface on which the laser beam is incident and an output surface from which the laser beam is output, and adapted to scan the laser beam output from the output surface across a predetermined target; and a housing for housing the optical member. The optical member further includes a first positioning portion at a side of the incident surface and a second positioning portion at a side of the output surface. The housing includes a first engaging portion to be engaged with the first positioning portion and a second engaging portion to be engaged with the second positioning portion. The first and second positioning portions have mutually different shapes.