Metal working – Method of mechanical manufacture – Shaping one-piece blank by removing material
Patent
1995-09-29
1997-12-02
Bryant, David P.
Metal working
Method of mechanical manufacture
Shaping one-piece blank by removing material
359217, 359850, B23P 1304
Patent
active
056922876
ABSTRACT:
A metal mirror manufacturing method effectively uses the precision of a polygon mirror blank obtained by press working by omitting a peeling step, thereby improving the productivity. In order to achieve this object, there is provided a method of manufacturing a polygon mirror by finishing each surface of a metal mirror blank having undergone press working into a mirror surface by a cutting process, including the steps of cutting intersecting portions between the respective surfaces of the mirror blank by a cutting process by a predetermined amount, and flattening each of the surfaces by causing a mirror-working cutting tool to enter the mirror blank from a cut mark of each cut intersecting portion.
REFERENCES:
patent: 4768861 (1988-09-01), Epner
patent: 4842354 (1989-06-01), Takahashi et al.
patent: 5463503 (1995-10-01), Kawada et al.
IBM Technical Disclosure Bulletin, "Diamond Flycut Multifaceted Mirror", vol. 26, No. 2, pp. 559-560 (Jul. 1983).
Atsugi Takao
Nakamura Koichi
Ohyoshi Koichi
Bryant David P.
Canon Kabushiki Kaisha
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