Patent ID: 6687283
Filing Date: 2004-02-03
Classification: B41J,G02B

Abstract:
A multi-beam source unit including a base member, the base member being provided with a multi-beam laser diode capable of emitting multi-laser beams from a plurality of light emitting points, the multi-beam laser diode having a stem formed with a cutout portion, and also provided with a collimator lens for collimating the multi-laser beams, the multi-beam source unit being designed so as to be set to a optical system on the assumption that the plural light emitting points arranged in the direction of a predetermined standard design line when they are present on a virtual straight line defined by said cutout portion,wherein the base member is formed with a mounting seat portion having a through hole to support the multi-beam laser diode rotatably, the stem is formed with an engaging recess for positioning the direction of the virtual straight line to the direction of the standard design line, the mounting seat portion being formed with a positioning groove which cooperates with the engaging recess to align the direction of the virtual straight line with the direction of the standard design line, a tip of jig is inserted through the positioning groove into engagement with the engaging recess, and in this <1> positioned state the multi-beam laser diode is pressed and fixed into the base member by means of a pressing plate which presses a back side of the stem.