Project Title:
Versatile, Holographic, Optical Element for High-Resolution Spectroscopy
08.10-8442
911471
Versatile, Holographic, Optical Element for High-Resolution Spectroscopy
Applied Research Corporation
8201 Corporate Drive, Suite 1120
Landover
MD
20785
Hemant H.
Dave
301-459-8442
GSFC
NAS5-31918
151
08.10-8442
911471
Abstract:
Versatile, Holographic, Optical Element for High-Resolution Spectroscopy
Fabry-Perot (FP) interferometers are routinely used to measure upper atmospheric
wind velocities, temperature differences, and weak emissions from astronomical objects.
For a given wavelength, etalon plate spacing, and index of refraction of medium between
the plates, the output is an interference pattern of concentric rings. The conventional
method utilizes only the central portion of the Airy-disk pattern. Theoretically
each ring carries the same light intensity; therefore it is obvious that the throughput
of the system will increase dramatically if one utilizes many rings. Conventional
ways of using multiple annular apertures or multiple detectors and thick focusing
lens do not offer any extra benefits. A holographic optical element (HOE) will be
developed to replace the lens, aperture, and filter in a FP interferometer. The new
HOE is expected to enhance performance dramatically.
The successful completion of this project will result in a new generation of imaging
lenses for high resolution spectroscopy. Potential applications exist in plasma research,
monochromators, astronomy, remote sensing, x-ray microscopy, and neutron imaging.