POLYGON MIRROR, METHOD FOR MANUFACTURING POLYGON MIRROR, AND REFLECTING MIRROR
First Claim
1. A polygon mirror comprising a substrate having a plurality of side surfaces, a first base surface connecting to the plurality of side surfaces, and a second base surface connecting to the plurality of side surfaces, the first base surface and the second base surface facing away from each other, each side surface having a first region, and a second region adjoining the first region and extending between the first region and at least one edge of the side surface,wherein the substrate is made of plastic, and a reflection coating is formed on the first region and the second region, andwherein a surface roughness of the second region of the substrate is greater than a surface roughness of the first region of the substrate.
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Accused Products
Abstract
A polygon mirror includes a substrate having a plurality of side surfaces, a first base surface connecting to the plurality of side surfaces, and a second base surface connecting to the plurality of side surfaces, the first base surface and the second base surface facing away from each other. Each side surface has a first region, and a second region adjoining the first region and extending between the first region and at least one edge of the side surface. The substrate is made of plastic, and a reflection coating is formed on the first region and the second region. A surface roughness of the second region of the substrate is greater than a surface roughness of the first region of the substrate. A method for manufacturing such a polygon mirror and an optical reflecting mirror are also provided.
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Citations
14 Claims
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1. A polygon mirror comprising a substrate having a plurality of side surfaces, a first base surface connecting to the plurality of side surfaces, and a second base surface connecting to the plurality of side surfaces, the first base surface and the second base surface facing away from each other, each side surface having a first region, and a second region adjoining the first region and extending between the first region and at least one edge of the side surface,
wherein the substrate is made of plastic, and a reflection coating is formed on the first region and the second region, and wherein a surface roughness of the second region of the substrate is greater than a surface roughness of the first region of the substrate.
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10. A method for manufacturing a polygon mirror which comprises a substrate having a plurality of side surfaces, a first base surface connecting to the plurality of side surfaces, and a second base surface connecting to the plurality of side surfaces, the first base surface and the second base surface facing away from each other, each side surface having a first region, and a second region adjoining the first region and extending between the first region and at least one edge of the side surface, the method comprising:
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a substrate formation step for forming the substrate by injecting plastic into a mold, and a coating step for forming a reflection coating on the first region and the second region, wherein the mold has a first region forming surface contoured to form the first region of the substrate to be molded, and a second region forming surface contoured to form the second region of the substrate to be molded, and wherein a surface roughness of the second region forming surface is greater than a surface roughness of the first region forming surface. - View Dependent Claims (11, 12, 13)
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14. An optical reflecting mirror comprising a substrate having a first surface, and a second surface connecting to the first surface at an angle made with the first surface, the first surface having a first region, and a second region adjoining the first region and extending between the first region and at least one edge of the first surface,
wherein the substrate is made of plastic, and a reflection coating is formed on the first region and the second region, and wherein a surface roughness of the second region of the substrate is greater than a surface roughness of the first region of the substrate.
Specification