Abrading – Abrading process – Combined abrading
Reexamination Certificate
2007-10-16
2007-10-16
Nguyen, Dung Van (Department: 3723)
Abrading
Abrading process
Combined abrading
C451S028000, C451S051000
Reexamination Certificate
active
10957632
ABSTRACT:
Aspects of the invention can provide a manufacturing method of a sub-mirror that can readily enhance manufacturing yield. The manufacturing method of a sub-mirror used for a light source lamp provided with an arc tube, an ellipsoidal reflector to reflect lights emitted from the arc tube to be emitted toward an illuminated region, and a sub-mirror having a reflection concave surface to reflect the lights emitted from the arc tube to the ellipsoidal reflector and a through-hole used for attachment to the arc tube. The manufacturing method of a sub-mirror can include a tube-like member preparing step of preparing a tube-like member having an inside diameter dimension matching with an inside diameter dimension of the through-hole, a grinding step of forming a concave surface, though grinding applied from one end face side of the tube-like member, a polishing step of polishing the concave surface formed in the grinding step, and a reflection layer forming step of forming the reflection concave surface by forming a reflection layer within a concave surface polished in the polishing step.
REFERENCES:
patent: 2583726 (1952-01-01), Chalom
patent: 6491396 (2002-12-01), Karasawa et al.
patent: A 01-293313 (1989-11-01), None
patent: U 06-015001 (1994-02-01), None
patent: A 9-120067 (1997-05-01), None
Nguyen Dung Van
Oliff & Berridg,e PLC
Seiko Epson Corporation
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