Optical scanning apparatus and image forming apparatus
AssigneeSharp Kabushiki Kaisha
InventorsAyumu ODA, Nobuhiro SHIRAI
Life of this patent
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Abstract
In one embodiment of an optical scanning apparatus, a light blocking member is provided that is disposed facing a reflective face of a polygon mirror near the reflective face, and blocks stray light without blocking light in an effective scanning range of a laser beam. The light blocking member includes a light blocking plate having an opposing face that faces the reflective face of the polygon mirror, a support plate that supports the light blocking plate, and a fixing plate that fixes the lower edge portion of the support plate to a support member. The opposing face of the light blocking plate is inclined relative to the reflective face of the polygon mirror, and a space below the light blocking plate is open.
Claims17
An optical scanning apparatus, comprising:
- a light source that irradiates a laser beam;
- a rotating polygon mirror that deflects and scans a laser beam from the light source;
- and
- a light blocking member that is disposed facing a reflective face of the rotating polygon mirror, and blocks other light without blocking light in an effective scanning range of the laser beam;
- wherein an opposing face of the light blocking member that faces the reflective face of the rotating polygon mirror is inclined.
Dependencies are inferred from the claim text.