Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2005-04-26
2005-04-26
Luu, Thanh X. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C248S550000
Reexamination Certificate
active
06884992
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.
REFERENCES:
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patent: 01052369 (1989-02-01), None
patent: 01286244 (1989-11-01), None
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patent: 05079811 (1993-03-01), None
patent: 08321274 (1996-12-01), None
PCT/DE98/01186 International Search Report dated Nov. 16, 1998.
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