Rangefinder
US4457621A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 16, 1980 |
| Grant date | Jul 3, 1984 |
| Priority date | — |
| Expiry date | Apr 16, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/42
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A laser rangefinder including a reflector carried by a rotatable support and arranged to repetitively nod in elevation for deflecting the beam from a laser generator at an instant elevational angle dependent on the instant elevational position of the reflector so that the elevational nod of the reflector and rotation of the support produce a helical scan pattern. A deflector positioned between the beam generator and reflector additionally deflects the beam before it impinges on the reflector to direct the beam toward a target regardless of the instantaneous elevational position of the nodding reflector. A beam receiver receives via the reflector any beam reflected back from a target hit by an outgoing beam. The rangefinder is combined with a surveillance scanner to form a surveillance system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.