Tunable optical filter
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United States of America Patent
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N/A
Issued Date -
Feb 12, 2004
app pub date -
Jul 31, 2003
filing date -
Aug 18, 2000
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A tunable optical filter comprises an optical filter plate for filtering an optical radiation beam, the filter plate exhibiting a spatially non-uniform optical filtration characteristic. Optical beam forming components are provided for receiving optical input radiation at the filter and forming the input radiation into the radiation beam, and for receiving the beam after its optical interaction with the filter plate for forming output radiation for output from the filter. Additionally, actuation components are provided for controllably moving the filter plate relative to the radiation beam for selecting preferred filtration characteristics of the filter plate. The actuation components include a threaded drive shaft whose thread has leading and trailing thread faces; and threaded nut regions resiliently engaging the leading and trailing thread faces of the drive shaft for reducing backlash, the threaded nut regions being in communication with the filter plate for moving the filter plate relative to the radiation beam in response to rotation of the drive shaft member relative to the threaded nut regions.
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