Arrangement for color coding of surfaces
US4249827A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 1978 |
| Grant date | Feb 10, 1981 |
| Priority date | — |
| Expiry date | Apr 17, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2019/06253
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An arrangement in which different surfaces of an object have applied to them transparent layers of different colors. Each layer will transmit one or more colors, while inhibiting the transmission of one or more other colors. By applying different color layers or paints, so that the combination of layers have different transmission characteristics, different surfaces of an object may be uniquely identified. To identify a predetermined surface, the colors applied thereon are noted, and the surface is illuminated. A filtering arrangement used in conjunction with either the illuminating source or a photograph camera, causes unique exposure of the film, for a predetermined combination of color filter and color paints applied in sequence on the surface being examined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.