Optical sensor with planar wall
US6163034A · kind A · utility
1Cited by
4References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 5, 1999 |
| Grant date | Dec 19, 2000 |
| Priority date | — |
| Expiry date | Mar 5, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07D7/121
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An improved optical sensor for a banknote validator uses an aspherical lens having a planar wall as a combination radiation plug for a port in the pathway and a focusing arrangement. Emitters and receivers are closely positioned on a common support and generally located at the focal point of the lens. The radiation reflected by a banknote is focused and received by the receiver. The lens also serves to collimate the produced radiation of the emitters for scanning of the banknote.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.