Patent ID: 8525865
Filing Date: 2013-09-03
Classification: B41J,G02B,G03G,H04N

Abstract:
1. An optical scanning apparatus, comprising: a housing having a plate configured to partition an inner space of the housing into an upper portion and a lower portion; a light source housed in the housing; a deflector housed in the housing and configured to deflect a light beam emitted from the light source; an imaging lens housed in the housing and configured to convert the light beam deflected by the deflector into a constant speed scanning light beam; a plurality of reflective mirrors housed in the housing and configured to reflect the constant speed scanning light beam to be guided to a photoreceptor; a synchronization detector housed in the housing and configured to detect timing at which scanning of the photoreceptor by the light beam is started; and a synchronization detection mirror housed in the housing and configured to reflect the light beam to be guided to the synchronization detector, wherein at least one of the plurality of reflective mirrors is disposed midway in a synchronization detection light path extending from the deflector to the synchronization detection mirror, wherein the light beam reflected by the synchronization detection mirror is reflected again by at least one of the plurality of reflective mirrors, such that the light beam is guided to the synchronization detector, wherein the synchronization detector and the synchronization detection mirror are disposed on the plate, and wherein the synchronization detector is disposed on one side of the plate closer to the deflector, and the synchronization detection mirror is disposed on the other side opposite to the one side of the plate.