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Collimation of Astronimical Telescopes
Evaluation of the Seidel Aberration
Optical Quality of the McCormick 26inch
3 other sections not shown
aberration coefficients alignment catalog angular diameter astigmatism astronomical telescopes Cassegrain telescope coincident collimated coma coefficient converging wave front decollimation determined direction of shear distance dividing plane earth's atmosphere effects evaluate eyepiece focal length FRINGES WHEN SECONDARY Hartmann test image point interference fringes Kosters prism lens in plate light source lower row McCormick 26-inch refractor McCormick Observatory measuring stellar diameters minutes of arc mirror is tilted off-axis images off-axis tests off-axis wave on-axis wave front optical axis optical elements optical quality plot point source radial zone reference circle rotated sagittal rays secondary mirror axis Seidel aberrations Seidel coefficients shear angle shear direction shear unit sheared images shearing interferometer shearing prism shown in figure spherical aberration spherical wave front system axis tangential and sagittal tele telescopic system tilting the secondary transverse aberration true wave front upper rows wave front produced wave front shearing WSI FRINGES WSI test zonal focal curve