Class ThickLens

source code

ThickLens class.

This class represents thick lenses, specified by curvatures and thickness
instead of focal length.

Actions:
    * T on HR: 0
    * R on HR: + 1
    * T on AR: 0
    * R on AR: + 1

*=== Additional attributes with respect to the Optic class ===*

None

*=== Name ===*

ThickLens

**Note**: the curvature of any surface is positive for a concave surface
(coating inside the sphere).
Thus kurv*HRNorm/|kurv| always points to the center
of the sphere of the surface, as is the convention for the lineSurfInter of
geometry module. Same for AR.

*******     HRK > 0 and ARK > 0     *******           HRK > 0 and ARK < 0
 *****                               ********         and |ARK| > |HRK|
 H***A                               H*********A
 *****                               ********
*******                             *******

**Note**: in the case of thicklenses, the thickness provided to and by the
initializer is the thickness *on the optical axis*, and not the thickness
on the side of the component (like mirrors).

**Note**: in the case of thicklenses, the center provided to the initializer
is the *apex* of the principal face, and not the chord of the HR surface.