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) |
