Mechanism element for optical devices
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.
1. A mechanism element for optical devices comprising:
a light-incident part inside an optical device in which light having wavelength of 700 nm or more enters,
the light-incident part comprising:
aluminum or an alloy of aluminum or magnesium,
at least the light-incident part subjected to an anodizing process treatment to form an anodized coating, and the anodized coating of the surface of the light-incident part being subjected to a secondary electrolytic coloring method treatment,
wherein the mechanism element is a lensbarrel holding a single or multiple lens system.
2. The mechanism element for optical devices according to claim 1 , wherein the anodized coating has a thickness of 4 to 6 μm.
3. The mechanism element for optical devices according to claim 1 , wherein the anodized coating has a thickness of 3 to 7 μm.
4. The mechanism element for optical devices according to claim 1 ,
wherein an electrolyte used in the secondary electrolytic coloring method comprises primarily at least one of Sn salt and Ni salt, and a metal thereof is deposited in pores of the anodized coating.
5. The mechanism element for optical devices according to claim 4 ,
wherein the mechanism element is used in a vacuum.
6. The mechanism element for optical devices according to claim 1 ,
wherein the mechanism element is used in a vacuum.