Method and apparatus useful for determining an angle between a virtual optical axis and a planar surface
US5207000A · kind A · utility
23Cited by
3References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1991 |
| Grant date | May 4, 1993 |
| Priority date | — |
| Expiry date | Jun 14, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C15/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A line is extended along a virtual optical axis of an objective lens. The line extends between a transparent plate, which is attached to the lens, and another transparent plate which is secured to a planar surface. The objective lens is part of an optical measuring instrument. An angle indicator is secured to the planar surface. The angle indicator is rotatable so that where the line touches the angle indicator, the angle between the planar surface and the virtual optical axis may be read with respect to azimuth and elevation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.