Computer Science – Performance
Scientific paper
Jan 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987spie..805...66s&link_type=abstract
IN: Optical components and systems; Proceedings of the Meeting, The Hague, Netherlands, Mar. 31-Apr. 1, 1987 (A88-51443 22-35).
Computer Science
Performance
Advanced Very High Resolution Radiometer, Lens Design, Telescopes, Tolerances (Mechanics), Concavity, Design Analysis, Hyperbolas, Zoom Lenses
Scientific paper
A null lens is described to test the hyperboloid primary mirror of Very High Resolution Radiometer (VHRR) telescope. It can be used to test a variety of optical systems or components. Conics and higher order aspheric mirrors can be tested with the same null lens if it can zoom the amount of spherical aberration introduced. It is a triplet lens with all spherical surfaces. The output F/No. and image position remains fixed during the zoom. The performance of this device has been analyzed for hyperboloid mirror of diameter of 208 mm which works at F/2.0. The performance has been characterized by RMS wave front deformations. Test set up has been analyzed for centered and decentered tolerances, irregularity in surfaces, single surface decenter and displacements and a group decentering tolerances. Final tolerance parameters for null lens have been tabulated.
Alex T. K.
Babu N. J.
Rao V. Bhaskar D.
Saxena Kanak
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