System4f.principalPlanePositions

raytracing.System4f.principalPlanePositions(self, z)

Positions of the input and output principal planes.

Parameters:

z (float) – Position from where the positions are calculated

Returns:

principalPlanePositions – An array of front principal plane position and the back principal plane position.

Return type:

array

Examples

>>> from raytracing import *
>>> # M1 is an ABCD matrix of a lens (f=5)
>>> M1= Matrix(A=1,B=0,C=-1/5,D=1,physicalLength=3,frontVertex=-1,backVertex=5,label='Lens')
>>> Position0=M1.principalPlanePositions(z=0)
>>> print('PP positions (F,B):' , Position0)
PP positions (F,B): PrincipalPlanes(z1=0.0, z2=3.0)

See also

raytracing.Matrix.effectiveFocalLengths, raytracing.Matrix.focusPositions