Remote tracking system for moving picture cameras and method
US5268734A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 1990 |
| Grant date | Dec 7, 1993 |
| Priority date | — |
| Expiry date | May 31, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/695
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The system includes a mobile remote unit sensitive to infrared (IR) signals transmitted by a base or stationary unit and an IR transmitter which is placed behind a rotating lens whose position at any time is known with precision resulting in the IR signal being "scanned" across an area. The remote unit detects when the peak strength of the signal occurs and provides this data via an RF signal to the base unit wherein the exact effective angle between the axis of the IR signal and the remote unit creates an error signal used by the base unit to position the camera mounted thereon. Transmitters for TILT and two PAN positions, PAN 1 and PAN 2, are used to include range calculations for ZOOM functions. Command circuitry to override the automatic tracking function is provided in each of the units.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.