Optical mark reader head for document markings
US4647766A · kind A · utility
14Cited by
3References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 24, 1985 |
| Grant date | Mar 3, 1987 |
| Priority date | — |
| Expiry date | Apr 24, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10762
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In an optical mark reader head comprising a light source (57) and two photosensors (58, 59) coupled to light transmission means forming a light emitting head (7) bracketed by two receiving heads (8, 9), all facing the document, and further comprising an analog processing circuit board (50) for the photosensor signals, supporting the light source and the photosensors. The invention provides transmission means in the form of rigid, preformed optical conduits (27, 28, 29) individually assembled and arranged relative to one another and together with the other reader head components in a single, flat case (1).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.