rayoptics.parax.idealimager module
module to setup an ideal imager
- class IdealImager(m, s, sp, tt, f)
Bases:
tuple
- f
focal length
- m
(lateral) magnification
- s
object distance from first principal plane, P1->Obj
- sp
image distance from second principal plane, P2->Img
- tt
total track length, tt = sp - s
- ideal_imager_setup(**inputs)[source]
Calculate the ideal imaging properties given two independent parameters
Given 2 system parameters from the following list, this function calculates the remaining parameters.
Note that if specifying
tt
andf
, their ratio, tt/f, must be greater than or equal to 4. A ValueError is raised otherwise.For a typical system, the value of
s
is negative, i.e. the object is to the left of the first principal plane.Example:
In [3]: m1s1 = ideal_imager_setup(m=-0.5, s=-10.0); m1s1 Out[3]: IdealImager(m=-0.5, s=-10.0, sp=5.0, tt=15.0, f=3.333333333333) In [4]: s_inf_efl = ideal_imager_setup(s=-math.inf, f=25.0); s_inf_efl Out[4]: IdealImager(m=-0.0, s=-inf, sp=25.0, tt=inf, f=25.0)
- Parameters:
m – (lateral) magnification
s – object distance from first principal plane, P1->Obj
sp – image distance from second principal plane, P2->Img
tt – total track length, tt = sp - s
f – focal length
- Returns:
IdealImager
namedtuple- Raises:
ValueError – if tt/f < 4