Detector for use for measuring dimensions of an object
US4663588A · kind A · utility
8Cited by
2References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 26, 1984 |
| Grant date | May 5, 1987 |
| Priority date | — |
| Expiry date | Jul 26, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/243
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A detector head for use in a measuring device includes a plurality of constituent measuring elements arranged in at least two blocks, each block producing an output signal of equal amplitude, and a phase shifter provided to shift the relative phases of the output signals of the blocks to have a predetermined relative phase difference, whereby selected higher-order harmonic components are cancelled from the resultant signal formed by summing the signals produced by the separate blocks of constituent elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.