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AplanatConformal opticsVirtual imageReal imageFocal planeStigmatismLongitudinal aberrationFocal depthFocal lengthVergenceVertexSemilensGabor waveletPolyhedronCatoptricsFocusMinimal surfaceOptical axisCaustic curveMultiplying lensFresnel numberOrthopticVergencyAngle of reflectionFresnel's rhombClosed formFormBisectrixConjugate mirrorAxial pointSpheroformVisual angleLeast squaresSpherical coneSpheropolyhedronCusp formPerspectivitySphericsFocalConformal geometryCausticNormal formObjective functionLinear perspectiveIsopticSpherical angleFocaloidCuspformSpheriumGeodesicPrismPrismoidRectangular hyperbolaGenomathematicsSpheroconicCircle of the gorgeOsculantForm factorMinimizationProjectorOne-formGloboidSymplectizationApertureConvex hullUnit hyperbolaGabor filterAngle of incidenceSpherical geometryKilling formSuperellipsoidOrthosliceAbsolute formAngular defectHyperspheroidElliptizationOptimization problemModular formBonne projectionHalfway modelToroidalizationNullconeConicsSegmentRationalificationIndicatrixHyperellipsoidSmall circleQuadratic formSuperquadricKlein bottleTrisectrixHolohedrismParabolaQuadricRiemannian geometrySymplecticSupercircleFull angleFixpoint