Patent ID: 7436425
Filing Date: 2008-10-14
Classification: H04N

Abstract:
1. An optical writing apparatus comprising: a deflecting part having a deflection plane for deflecting a plurality of light beams; a synchronization detection mirror for reflecting the plural light beams from the deflecting part; a synchronization detection part for detecting the timing for deflecting the plural light beams reflected from the synchronization detection mirror, the synchronization detection part including wherein the synchronization detection mirror is downwardly inclined at a predetermined angle with respect to a plane perpendicular to a scanning plane of the deflecting part, wherein the synchronization detection mirror reflects the plural light beams to the lens at a diagonally downward acute angle with respect to the scanning plane of the deflecting part, wherein the holding member has a lens holding plane that is inclined in a sub-scanning direction to hold the lens in an upward inclined state, wherein the lens holding plane is inclined substantially perpendicular with respect to the plural light beams incident on the lens, wherein the plural light beams are separated with respect to the sub-scanning direction, wherein the holding member has a box-like shape, wherein one plane of the holding member is the lens holding plane that holds the lens and the other plane of the holding member is a plane that holds the light detection plate, wherein the holding member has an opening and a space that are formed at a substantially center portion thereof between the lens and the light detection plate for inserting a fastening member therethrough, wherein both sides of the holding member are formed by walls for encasing the space therein, and wherein the holding member has a hole at a bottom thereof continuing from the space for fastening the fastening member to the housing.