06965119 is referenced by 13 patents and cites 32 patents.

The present invention relates to a method for calibrating elements in a spatial light modulator (SLM) as a function of an applied element control signal. A plurality of elements are calibrated simultaneously. A beam of electromagnetic radiation is projected onto at least a part of the SLM. An image of said part of said SLM is formed on a device for measuring intensity of electromagnetic radiation. Element calibrating data is generated by using the intensity data as a function of the applied element control signal by either driving a sub-matrix comprising at least two elements out of said part of the SLM to a sequence of applied element control signals or by seeking out the control signal for each element which give the same predetermined intensity value on the device for measuring the intensity of electromagnetic radiation and stepping through N different predetermined intensity values. The invention also relates to an apparatus for patterning a workpiece having such a calibration method. Other aspects of the present invention are reflected in the detailed description.

Title
Method and apparatus of calibrating multi-position SLM elements
Application Number
10/238220
Publication Number
6965119 (B2)
Application Date
September 10, 2002
Publication Date
November 15, 2005
Inventor
Jarek Luberek
Göteborg
SE
Torbjörn Sandström
Pixbo
SE
Agent
Haynes Beffel & Wolfeld
Ernest J Beffel Jr
Assignee
Micronic Laser Systems
CH
IPC
G01N 021/86
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