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LFDI



The Lyot Filter Demonstration Instrument (LFDI)






The Lyot Filter Demonstration Instrument is a technology advancement effort. Completed in 2026, it is a validation of a temperature-compensated, electro-optically tuned, birefringent optical filter. This technology will enable high-resolution spectroscopy within imaging system payloads for both balloon and space-borne missions studying solar physics.

LFDI Documents

Thermal FEA demonstrating stress free bonding and mounting approach

Mechanical FEA demonstrating survivability from vibration GEVS standard launch conditions

Printed Circuit Board design for the temperature compensated liquid crystal variable retarder drive circuit

Laboratory data showing the PCB control board meets its functional and performance requirements

Software Algorithms and embedded microprocessor code coupling the Lyot Filter control board to the opto-mechanical assembly

Optical filter transmission data taken before and after thermal vacuum testing demonstrating profile characteristics (FWHH linewidth, free spectral range and tuning range)

+/-15V Boost Converter Board (BCB) Design and Performance









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This material is based upon work supported by the NSF National Center for Atmospheric Research, a major facility sponsored by the U.S. National Science Foundation and managed by the University Corporation for Atmospheric Research. Any opinions, findings and conclusions or recommendations expressed in this material do not necessarily reflect the views of the U.S. National Science Foundation.







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