simulation of paraboloid mirror about shadow3 HOT 1 CLOSED

1- I wonder whether two symmetrical mirrors have actually been set in the paraboloid module?
Actually yes. Shadow calculates the intercept with the infinite surface. Then, from the two posible solutions of the conic equation, it takes the closer one.

2 > Here comes the question: If I choose a gaussian source, the center light of the source is the ray that initiated from the center of gaussian spot to the point “A” which firstly defines the parabolic mirror that I construct, In the design of a spectrometer. It is hoped that the center light coincides with the parabolic mirrors symmetrical axis, the situation above makes the gaussian source plot somewhat asymmetric for parabolic symmetry axis.
What could I attempt to make the center light coincide with the parabolic symmetry axis?

This is difficult. I have no answer.
I tried the parabola with the beam in normal incidence (0 degrees with the normal) and placing the source at the parabola focus. You get something collimated, but the footprint on the mirror is not good (shadow takes the closer solution and we want the farther one).

3 - The application of the movements has a sequential order (I do not remember, I should look to the code). I suggest not to move source and OE at the same time.
Note that the source and OE movements are set to see the beam displacement therefore the origins (optical axis) still corresponds to the non-deviated beam.

What I suggest is to simulate only one reflection (not the two reflections at the same time) and rotate the element (and translate it) to see the effect of misalignment.

Sorry for not being more helpful!

from shadow3.