Process for fabricating lenses for manufacturing cathode ray tube screen structures
US4030790A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 1976 |
| Grant date | Jun 21, 1977 |
| Priority date | — |
| Expiry date | Sep 15, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S359/90
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A process for fabricating lenses for use in manufacturing cathode ray tube screen structure wherein a matrix of data points is selected on the viewing screen of the cathode ray tube and a light source is positionally located at each of the data points by optical scanning exposure apparatus. The location information for each of the data points is recorded and a cathode ray tube is constructed having the screen structure fabricated in accordance with the recorded light source location information. Error between the light source location information and electron beam landing of the cathode ray tube is measured and the error measurements are utilized to correct the light source location information which is then submitted to a lens design program to furnish lens manufacturing information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.