Automatic leveling system and a method of leveling a workpiece based on focus detection
US4978841A · kind A · utility
9Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 24, 1989 |
| Grant date | Dec 18, 1990 |
| Priority date | — |
| Expiry date | Aug 24, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F9/7034
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An automatic leveling system and a method of use of the leveling system that is suited for use with electronic components. The system uses an automatic laser focus system to focus on three separate locations on a workpiece, and the information about the focus positions is sent to a control computer. In the control computer the focus information is transformed into information concerning how far the workpiece is from being level. The computer sends signals to pitch and roll goniometers that move in response to the signals, thus leveling the workpiece.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.