Sightline stablisation apparatus
US4643539A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 31, 1984 |
| Grant date | Feb 17, 1987 |
| Priority date | — |
| Expiry date | Oct 31, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/644
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In known sightline stabilizing apparatus 10 (FIG. 1) a gyro-stabilized reflector 25 maintained in orientation in space about two axes 18 and 26 by gyro means in the mechanism 22. The reflector mechanism is contained in housing 17 and is pivotable about elevation axis 18 in relation thereto. The housing also carries a sensor, e.g. a tv camera providing signals to a remote (non-stabilized) image display device, and is itself rotatable in elevation relative to a platform 16 rotatable in azimuth. The apparatus is normally carried by a vehicle and movements thereof cause servo responses of the mechanism 22 to stabilize the mirror and follow-up movements of the housing and pedestal 16 restore the mirror to the center of its limited motion in the housing. However, changes in elevation angle of the reflector cause rotation of the remote image about the center of its field of view and motion induced changes can rapidly lead to motion sickness in an observer of the image. The improvement of the invention consists of introducing an elevation offset between the mirror and the housing so that the sensor is offset about axis 18 and has essentially the same field of view from the mirror but the i…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.