Polygon mirror and polygon mirror molding die

Details Polygon mirror and polygon mirror molding die Polygon mirror and polygon mirror molding die

2008-07-15

2008-07-15

Phan, James (Department: 2872)

Optical: systems and elements

Mirror

Plural mirrors or reflecting surfaces

C359S216100, C359S850000, C425S573000

Reexamination Certificate

active

11242112

ABSTRACT:
A polygon mirror includes a reflective surface group having n number of reflective surfaces (M(1), . . . , M(n)) formed individually as outer peripheral side faces, a flat portion which shuts one end portion of the reflective surface group, and n number of pin gate traces (L(1), . . . , L(n)) which are provided on the flat portion, correspond to the n number of reflective surfaces, individually, and are kept individually at distances from edge portions at which the reflective surfaces cross the flat portion. There are conditions DM(1)>DL(1)/2, . . . , DM(n)>DL(n)/2and DM(1)>DL(n)/2, . . . , DM(n)>DL(n−1)/2, where DM(n) is a shortest distance from an edge portion at which the reflective surface M(n) and the flat portion cross each other to the pin gate trace L(n) and DL(n) is a shortest distance between the pin gate trace L(n) and the pin gate trace L(1).

REFERENCES:
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Notification of Transmittal of Copies of Translation of the International Preliminary Report on Patentability, Chapter I or Chapter II of the Patent Cooperation Treaty, and Written Opinion of the International Searching Authority, for PCT/JP2005/001141, 6 sheets, Aug. 22, 2006.

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