Opto-electronic measuring arrangement with electro-optical basic coupling
US8766154B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 22, 2013 |
| Grant date | Jul 1, 2014 |
| Priority date | — |
| Expiry date | Jan 22, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An opto-electronic measuring arrangement being independent from extraneous light includes a transmission light source and a compensation light source which sequentially emit light on a clocked phase basis. The emitted light is respectively phase-shifted. The light sources can be controlled such that the clock-synchronous signal difference between different phases becomes zero. A basic coupling light source transmits light directly to the optical receiver without the light being influenced by the measuring object. The basic coupling control current is so that a desired sensitivity of the measuring arrangement is achieved and/or a desired operating point can be set. The controllable current source for generating a clocked transmission control current and the controllable basic coupling current source for generating a clocked basic coupling control current are phase-synchronously clocked. The controllable compensation current source for generating a clocked compensation control current is clocked with the inverted clock signal of the clock generator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.