Spectrum analysers
US4295093A · kind A · utility
18Cited by
3References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 16, 1979 |
| Grant date | Oct 13, 1981 |
| Priority date | — |
| Expiry date | Nov 16, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R23/173
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A spectrum analyser uses a monochrome cathode ray tube to display frequency information. A color swtich incorporating a layer of liquid crystal material and colored polarized dichroic plates is positioned in front of the display screen of the cathode ray tube and by operating the color switch in an appropriate manner a colored display is produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.