Optical or laser ball target assemblies for precision location measurements
US4964218A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 10, 1989 |
| Grant date | Oct 23, 1990 |
| Priority date | — |
| Expiry date | Jul 10, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C15/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention is directed to targets for use where precise alignment and location measurements on an object is required. Several embodiments of the invention are described. The targets have at least a portion of their outer surface curvilinear. The target is supported on a convex supporting surface on a support body. Various configured single targets and multiple targets are described for use on flat as well as curved surfaces. Some of the targets have either non-reflective or reflective target surfaces. The various embodiments of the ball targets are used in conjunction with either optical or laser theodolites or the like to preform the required location measurements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.