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The Gaussian Theory of Lenses
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aberration Airy disk angle of incidence angular field autocollimated axial beam splitter bright camera collimator curvature curved diameter diffraction diopters distance distant object distortion emerging ray entrance pupil equal erector example exit pupil eyepiece F-number field lens film flux focal length focal plane focal point focus focused form an image front given glass grating height illumination image magnification image space indicated in Fig infinity inserted instrument intensity lens aperture lens axis lenses light located luminance magnifying power measured meridional ray microscope mounted moved negative numerical aperture object and image object space objective lens oblique beam optical system parallel beam paraxial paraxial ray perpendicular photocell photographic plate polarized principal ray prism projection lens projector ratio ray entering reflected refractive index resolving power rotating screen shown in Fig slit slope spectrum spherical stilb subtense surface telecentric thick thin lens tilted transmitted tube vertical wavelength zoom