Arrangement for determining visibility in the glide path of an aircraft
US3985452A · kind A · utility
4Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1975 |
| Grant date | Oct 12, 1976 |
| Priority date | — |
| Expiry date | Mar 17, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A90/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
For determining oblique visibility, for example on an airport, a light emitter emits a light beam and is coupled with a light receiver. A plurality of devices are located at different, known distances from the light receiver, which launch measuring bodies substantially vertically with a predetermined height for each of the units. The measuring bodies are arranged to reflect the light emitted from the light emitter back to the light receiver where the visibility is sufficient. The devices are operated sequentially.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.