Sample plate for supporting bar code scanning
US7931201B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 2007 |
| Grant date | Apr 26, 2011 |
| Priority date | — |
| Expiry date | Jan 14, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2035/00752
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sample plate for supporting bar code scanning is provided, comprising first-circle sample slots distributed along the circumference of the sample plate and clear slots each communicating correspondingly with each of the sample slots, wherein an angle α is formed between the line connecting the center of the circle of each first-circle sample slot to that of the sample plate and the axis of the corresponding clear slot, and the range of α is 4°<α<8°. As an angle is formed between the direction of the axis of the clear slot and that of the diameter of the sample plate, it is able to guarantee a reasonable range of the incident angle when the bar code scanning light is projected on the surface of the bar code.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.