Imaging and/or raster-mode scanning system provided with a device for compensating the image degradations resulting from environmental factors
US6884992B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Apr 29, 1998 |
| Grant date | Apr 26, 2005 |
| Priority date | — |
| Expiry date | Apr 29, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2237/28
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An imaging and raster-mode scanning apparatus has a compensation device for compensating for ambient influences that may degrade the imaging, comprising an electrical filter, and at least one sensor for providing a first signal dependent on the ambient influences the first signal passes through the filter directly and drives an internal actuator and a internal control elements of the apparatus, which has an effect on the imaging and on the image display, in a calibrated state of the apparatus, which comprises a setting of a transfer characteristic of the filter, image degradations are greatly reduced or essentially compensated for. The filter for calibrating the apparatus, has a calibration input and a second signal is applied to the calibration input of the filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.