Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Reexamination Certificate
2007-08-07
2007-08-07
Phan, James (Department: 2872)
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
C359S216100
Reexamination Certificate
active
10868972
ABSTRACT:
A light scanning apparatus is provided. The light scanning apparatus includes a beam splitter, which is located between a polygonal mirror and an fθ lens and reflects a portion of light incident thereon to the polygonal mirror. A laser beam reflected from the beam splitter is reflected by the polygonal mirror and incident on the fθ lens. The path of a laser beam incident on the polygonal mirror and the path of the laser beam reflected from the polygonal mirror are at the same level with each other. Therefore, by installing a beam splitter in a laser scanning apparatus, it is possible to reduce the length of each reflective surface of the polygonal mirror in a main scanning direction without increasing the length of each reflective surface of the polygonal mirror in a sub scanning direction. In addition, it is possible to perform high-speed scanning while making less noise.
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Phan James
Roylance Abrams Berdo & Goodman L.L.P.
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