Basic lenses come in different shapes which affect how light is bent as it passes through the lens.
|
Shape
|
Term
|
|
curved out
|
convex
|
|
curved in
|
concave
|
|
vertical
|
plane
|
There are 9 combinations.
|
Surface Nearer to the Light Source
|
Surface Nearer to the Viewer's Eye
|
Term
|
|
curved out
|
curved out
|
convex (convex-convex)
|
|
curved out
|
vertical
|
convex-plane
|
|
curved out
|
curved in
|
convex-concave
|
|
vertical
|
curved out
|
plane-convex
|
|
vertical
|
vertical
|
plane (plane-plane)
|
|
vertical
|
curved in
|
plane-concave
|
|
curved in
|
curved out
|
concave-convex
|
|
curved in
|
vertical
|
concave-plane
|
|
curved in
|
curved in
|
concave (concave-concave)
|
