Optical sensor protective member
US4818132A · kind A · utility
4Cited by
8References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1988 |
| Grant date | Apr 4, 1989 |
| Priority date | — |
| Expiry date | Feb 12, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V8/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A protective member in the form of an opaque brush operates as a non-reflective shield to an optical sensor while protecting such sensor against ambient light. The brush also provides for removal of contamination from the surface of the optical sensor as a slip or like document is inserted along a guide by causing the brush to swing across such surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.