LIGHT SCANNING UNIT AND IMAGE FORMING APPARATUS HAVING THE SAME

摘要

PURPOSE: A laser scanning unit and image forming apparatus applying the same are provided to easily distinguish injection direction of light beam using one optical detector. CONSTITUTION: A light source(20) is irradiated using optical beam. A beam deflector(30) make irradiated light beam bias. A beam bias device forms clockwise and counterclockwise scanning lines to a first and second non-image section. A reflective member(40) reflects incident light beam from the beam bias device. A light detector(50) receives the second light beam passing the first light beam and reflective member.