Automatic angle compensator
US5847824A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 3, 1995 |
| Grant date | Dec 8, 1998 |
| Priority date | — |
| Expiry date | Apr 3, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/64
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An automatic angle compensator comprising a liquid sealing container 4 having transparent liquid to form a free liquid surface 1 sealed therein, light projecting systems 21 and 22 for projecting light at a given angle to the free liquid surface, and an optical system for guiding the light beam, which is reflected by the free liquid surface and irradiated from the liquid sealing container, whereby optical axis of the light beam reflected by the free liquid surface is aligned with optical axis of the optical system regardless of whether the free liquid surface is turned by 0.degree. or 90.degree., and automatic compensation can be achieved regardless of whether the system is positioned in horizontal or vertical directions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.