Patent ID: 8917305
Filing Date: 2014-12-23
Classification: G03G

Abstract:
1. A light scanning apparatus including a light source including a plurality of light emitting elements arranged therein such that each of light beams from the plurality of light emitting elements exposes a different position on a rotary-driven photosensitive member in a rotational direction of the photosensitive member, emission timings of the plurality of light beams from the plurality of light emitting elements being controlled on a basis of a synchronization signal, the light scanning apparatus comprising: a deflection unit configured to deflect a plurality of light beams such that the plurality of light beams scans the photosensitive member; a light receiving element that receives the light beam deflected by the deflection unit and generates the synchronization signal based on the reception of the light beam deflected by the deflection unit; a first lens configured to guide the plurality of light beams deflected by the deflection unit onto the photosensitive member; and a second lens made of glass disposed on an optical path of the light beam deflected by the deflection unit and guiding the light beam deflected by the deflection unit onto the light receiving element, wherein the second lens focuses the light beam deflected by the deflection unit in a direction corresponding to a scanning direction of the plurality of the light beams, and wherein the light beam which has passed through the second lens does not expose the photosensitive member.