Physics – Optics
Scientific paper
Oct 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992pasp..104..931w&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 104, no. 680, p. 931-938.
Physics
Optics
1
Focal Plane Devices, Liquid Crystals, Spectrophotometers, Fiber Optics, Light Scattering, Optical Polarization, Pixels
Scientific paper
The use of liquid-crystal (LC) technology to build an easily reconfigurable focal-plane slit system from MOS is examined. Several kinds of LC screens were analyzed in a spectrophotometer and at the focus of the spectrograph on the 24-in. telescope at the Sommers-Bausch Observatory. Depending on the crystal material used, transmission can be as high as greater than or approximately equal to 80 percent in the clear state across the visible spectrum, and contrast ratios of greater than 100:1 can be obtained, but high contrast and high transmission are not both present in the same LCs. Based on the present tests, by stacking two screens of the best LCs currently available, an LC MOS slit assembly could be configured to provide a clear-state transmission of 50-70 percent across the optical band with off-state opacities approaching 10 mag in that same range. The major drawback of an LC MOS at this juncture is obtaining sufficient opacity between slits to achieve accurate sky subtraction.
Stocke John T.
Wurtz Ron
No associations
LandOfFree
Tests of liquid-crystal screens for use in multiobject slit spectroscopy does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Tests of liquid-crystal screens for use in multiobject slit spectroscopy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tests of liquid-crystal screens for use in multiobject slit spectroscopy will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1871006