System4f.traceThrough

raytracing.System4f.traceThrough(self, inputRay)

Contrary to trace(), this only returns the last ray. Mutiplying the ray by the transfer matrix will give the correct ray but will not consider apertures. By “tracing” a ray, we do consider all apertures in the system.

Parameters:: inputRay (object of Ray class) – A ray at height y and angle theta
Returns:: rayTrace – The height and angle of the last ray after propagating through the system, including apertures.
Return type:: object of Ray class

Examples

>>> from raytracing import *
>>> # M is an ABCD matrix of a lens (f=10)
>>> M= Matrix(A=1,B=0,C=-1/10,D=1,physicalLength=2,label='Lens')
>>> # R1 is a ray
>>> R1=Ray(y=5,theta=20)
>>> Tr=M.traceThrough(R1)
>>> print('the height of traced ray is' , Tr.y,  'and the angle is', Tr.theta)
the height of traced ray is 5.0 and the angle is 19.5