Patent ID: 8928721
Filing Date: 2015-01-06
Classification: B41J,G02B

Abstract:
1. A laser beam emission apparatus comprising: a laser light source configured to emit a laser beam, the laser light source is a vertical cavity surface emitting laser; a collimator lens configured to convert the laser beam emitted from the laser light source into parallel laser beam; a holding member configured to support the laser light source and the collimator lens, and including a lens barrel portion through which the laser beam emitted from the laser light source toward the collimator lens passes; a separation unit configured to separate the laser beam passing through into a transmitted laser beam and a reflected laser beam; an optical unit configured to guide the transmitted laser beam to an irradiated member; a light-receiving unit configured to receive the reflected laser beam; a condense lens arranged between the separation unit and the light-receiving unit and configured to condense the laser beam, on the light-receiving unit, reflected by the separation unit; a control unit configured to control a light quantity of a laser beam emitted from the laser light source based on a light quantity of the reflected laser beam received by the light-receiving unit; and a blocking member arranged between the separation unit and the light-receiving unit and configured to block the laser beam so that the laser beam transmitted through the collimator lens by being reflected by an inner surface of the lens barrel portion and being reflected by the separation unit, will not be condensed by the condense lens on the light-receiving unit, and to transmit the laser beam so that the laser beam transmitted through the collimator lens without being reflected by an inner surface of the lens barrel portion and being reflected by the separation unit, will be condensed by the condense lens on the light-receiving unit.