ROTATABLE POLYGON MIRROR, OPTICAL DEFLECTOR, SCANNING OPTICAL DEVICE, AND IMAGE FORMING APPARATUS
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United States of America Patent
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Issued Date -
Apr 4, 2024
app pub date -
Sep 5, 2023
filing date -
Oct 3, 2022
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Abstract
A rotatable polygon mirror includes a plurality of reflecting surfaces provided in parallel to a rotational axis direction, first surface and second surface of polygonal shape perpendicular to the plurality of reflecting surface and of which each side is continued to the plurality of reflecting surfaces. The second surface is opposite to the first surface. A through hole penetrates though the first and second surfaces in parallel to the rotational axis direction and to engage with a rotational shaft of a driving portion. As seen in the rotational axis direction, the through hole has substantially similar shape to the polygonal shape of the first and the second surfaces, and vertexes of the similar shape of the through hole are different in phase from apexes of the polygonal shape of the first and second surfaces with respect to a rotational direction of the polygon mirror.
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