Reading apparatus with separate illumination and detection optical axes
US5362953A · kind A · utility
9Cited by
16References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 18, 1992 |
| Grant date | Nov 8, 1994 |
| Priority date | — |
| Expiry date | Aug 18, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2007/10485
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for reading a bar code symbol with an illumination beam of light. The apparatus includes an integrally formed lens with a first lens surface for transmitting the beam of light toward the bar code symbol along an optical axis and second and third lens surfaces for receiving any of the beam of light that is reflected from the bar code symbol and transmitting the received light along two distinct optical paths to two photodiodes. The two distinct optical paths are separated from each other and not aligned with the optical axis. The configuration of lenses provides an improved depth of field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.