Spatial light modulator calibration
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United States of America Patent
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Issued Date -
May 25, 2006
app pub date -
Nov 23, 2004
filing date -
Nov 23, 2004
priority date (Note) -
Abandoned
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Abstract
A method and system for calibrating a spatial light modulator, such as a GLV in a printing system detects intensity levels of light provided by elements of the spatial light modulator. It determines control levels for the elements of the spatial light modulator that will compensate for spatial variation in the intensity of light across the spatial light modulator. These changes in intensity can be a result of the changes in properties of the GLV across its length. It can also be the result of changes in the intensity of light provided by the LIM across the spatial light modulator. The compensation comprehends the pulse width changes of the elements of the spatial light modulator, due to changes in the control levels due to the spatial variation compensation. This second level of compensation ensures that changes to the spot size that may result from conventional compensation are comprehended in generating a total compensation scheme that accounts for the dynamics in the operation of the spatial light modulator. Specifically, in one implementation, control levels for the elements of the spatial light modulator are selected to under compensate for the spatial variations to account for changes in the control levels due to the spatial variation compensation.
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