Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1985-04-15
1987-04-28
LaRoche, Eugene R.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250237G, 235488, G01D 534
Patent
active
046616977
ABSTRACT:
Herein disclosed is an optically reflecting code plate having a number of reflective and unreflective portions formed alternately on the surface of its substrate. This substrate is made of aluminum of high purity, for example, and has its surface anodized with a colorless, transparent and porous aluminum oxide film. At predetermined positions of the oxide film, which are to be formed with the aforementioned unreflective portions, moreover, metal such as nickel, tin, copper, iron, cobalt, silver, manganese or selenium is deposited by electrodeposition in the bottoms of the pores of the oxide film thereby to form a metal-deposited layer. Moreover, the vicinities of the openings of the aforementioned pores are impregnated with a dye such as a black metallized complex salt dye or a Nigrosine dye to form a dye-impregnated layer. The aforementioned metal-deposited layer and the dye-impregnated layer are overlaid the later over the former thereby to form the unreflective portions. The remaining portion shaving neither the metal-deposited layer nor the dye-impregnated layer so that it is exposed directly to the outside is left as the reflective portions.
REFERENCES:
patent: 4074798 (1978-02-01), Berger
patent: 4141780 (1979-02-01), Kleinknecht et al.
patent: 4230939 (1980-10-01), de Bont et al.
patent: 4286871 (1981-09-01), Erickson
Abe Hiraku
Hayasaka Kourou
Takahashi Yoshihiro
Alps Electric Co. ,Ltd.
LaRoche Eugene R.
Mottola Steven J.
Shoup Guy W.
LandOfFree
Optically reflecting code plate does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optically reflecting code plate, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optically reflecting code plate will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-478799