geodesic lens antenna

corneal lens lens

corneal lens（lenses） lens

Lens-to-lens interval

object lens objective lens

objective lens object lens

plane-concave lens (=plano-concave lens)

plane-convex lens (=plano lens)

short focal length lens (=short-focus lens)

variable focus lens vari-focus lens

vari-focus lens variable focus lens

a new fo rm of geodesic coordinate system

abnormal geodesic

absolute geodesic curvature

angle of geodesic contingence

angle of geodesic coutingence

angular excess of a small geodesic triangle

approximate geodesic distance

center of (geodesic) curvature