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Virtual imageReal imageConformal opticsFocal depthPerspectivityLongitudinal aberrationVergenceOptical axisBest form lensFocal lengthFocusOrthopticCatoptricsAplanatAngle of reflectionVertexFocal planeProjectionVisual anglePoint sourceAngle of incidenceMultiplying lensImageHolohedrismAutotopismPenrose triangleProjective geometryHomothetySymptosisTopological propertyCaustic curveIsopticVergencyCornerAxial pointGeorectificationPolyhedronFocalBisectrixSemilensConjugate mirrorProjectivityStereographic projectionIndicatrixIsometryTwo-point perspectiveFresnel numberHomographySuperprojectorSymplectizationZ-orderElliptizationPersymmetryFocaloidProjectorRotoreflectionOsculantSemicoveringLambert's cosine lawIsoclinismHomologyStrophoidStellationShapeIsocurvatureProspectivitySteiner pointCentrosymmetryApertureFresnel's rhombOne-formVanishing pointRectificationIllumination problemSymplectomorphismPoint at infinityRotational symmetryPrismDualityEllipsePrismatoidCollineationEquiconvergenceMultipointTransflectionFixpointPath tracingConformal geometryProjective spacePolysingularityHit pointExceptional spaceSphericsAntipointStereocorrelationShadow volumeCentre of symmetryCoimageSubdivergenceSupercurvature