Optical: systems and elements – Lens – With variable magnification
Reexamination Certificate
2005-08-16
2005-08-16
Epps, Georgia (Department: 2873)
Optical: systems and elements
Lens
With variable magnification
C359S704000, C359S694000
Reexamination Certificate
active
06930840
ABSTRACT:
A mechanism element for optical devices has a light-incident part on which light having a wavelength of 700 nm or more is incident, and the light-incident part is made of aluminum or an alloy of aluminum or magnesium. An anodizing process treatment to form an anodized coating is performed at least on the light-incident part, and then the surface of the light-incident part is colored to be black by a secondary electrolytic coloring method.
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patent: 6372357 (2002-04-01), Hayakawa et al.
patent: 6633353 (2003-10-01), Seki et al.
patent: 57037652 (1982-03-01), None
patent: 2002212788 (2002-07-01), None
Kobayashi Hiroshi
Konno Shigeo
Tohyama Seiji
Epps Georgia
Fujinon Corporation
Oliff & Berridg,e PLC
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