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Optics for Astrometry:a quick introduction
William F. van Altena
Yale UniversityBasic Astrometric Methods
Yale University
July 18-22, 2005
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Filters and windows -1
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Filters and windows - 2
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Filters and focal length
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Filters and focal length
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The Seidel Aberrations
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First-order theory
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S1 - Spherical aberration
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S1 and lens shape
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S1 and the caustic curve
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S1 and the HST
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S1 and astrometry
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S2 - zonal variation
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S2 - minimizing coma
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S2 and astrometry
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S3 - Astigmatism
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S3 and image shape
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S3 and astrometry
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S4 - Field Curvature
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S5 and field stops
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S6 - Chromatic aberration
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Reflecting telescopes
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Conic sections
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Aberrations in reflectors
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The sagittal depth
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Spherical aberration
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Higher-order aberrations - 1
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Higher-order aberrations -2
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Two-mirror telescopes
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Normalized parameters
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Reflector types
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Angular aberrations
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Classical Cass & the R-C
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Optical alignment errors
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Tilt and Decenter
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Alignment error example
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Relative aberrations
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Useful relations
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Tangent point location
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Astrometric correction formulae