Process for standardising the intensity of optical sensors used for measuring periodically oscillating electric or magnetic field intensities
US6265862A · kind A · utility
3Cited by
9References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 8, 1999 |
| Grant date | Jul 24, 2001 |
| Priority date | — |
| Expiry date | Jan 8, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R15/246
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The inventive method employs the -/+ division for intensity norming but forms the quotient from the signal difference and the signal sum not from component signals (L1, L2) generated by the sensor but--inventively --with signals (L1', L2') derived therefrom that exhibit periodically fluctuating intensity parts (I1'AC, I2'AC) of the same amplitude amount (.vertline.A.vertline.). The invention largely unites the advantages of -/+ division with those of AC/DC division.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.