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The Optical Technician
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aloxide aluminized Amici prism aperture aspheric assembly astigmatism autocollimation setup beam splitter bevels block cemented checked collimator concave contour convex surface correction corrector plate crystals curve cutoff diameter edge elements eyepiece face facets fine-grinding Fizeau interferometer focograms fringes glass angle glass blank glass disk glass runners glass-angle errors grinding and polishing grinding tool grit holder horizontal interferogram interferometer internal autocollimation laser lens system lenses light source method observed off-axis optical contacting optical figuring optical flat optical surfaces optician parabola paraboloid parallel light pattern penta prism pitch lap pitch polisher placed plane planointerferometer planoparallel polished surface polishing pressing plate primary mirror radii radius of curvature reflecting angle refractive removed right-angle prism Ronchi test Ronchigrams roof rotating Schmidt camera Schmidt-Cassegrain secondary mirror semipolished Shellac shown in Fig side angle slope spherical aberration spherical surface spheroid spherometer spindle surface quality test plates Vany wedge zonal zone