Skip to main content
Question

off-axis parabolic mirrors optimization/collimization


yqzhu

My goal at the moment is to set up a model based on existing optics. I’ve copied various surfaces provided by manufacturers and put them together in the zmx file attached. The layout looks like this:

 

In Zemax, I first collimated the input beam by running ‘quick adjust’ twice. As you can see, the spot diagram on the first parabolic mirror (M1) looks reasonable.  Then I did another ‘quick adjust’ to optimize the space between M1 and the second parabolic mirror M2. The beam ended up looking skewed on M2 and IMA. and I expect at least a axially symmetric profile.

spot diagram on first parabolic mirror (Edmund 35-507)
spot diagram on second parabolic

I think My problem has to do with the parabolic mirrors, probably with how I optimized the geometry. While I’m not sure if the beam would focus perfectly to one point as in the original model from Edmund, I think the output beam should look more symmetric at least. What should I optimize to achieve more symmetry?

Also, in the model provided by Edmund optics, both surface thickness of the mirror and tilt about Y in the coordinate break that follows are solved for. When I incorporated them into mine, I made all of them (on M1 and M2) fixed. When I left them as variables in M2, the optimized values turned out quite different. I feel that at least ‘thickness’ should not change because it’s a physical property, yes? 

I’m very new to Zemax. Any suggestions are appreciated. 

0 replies

Be the first to reply!

Reply


Cookie policy

We use cookies to enhance and personalize your experience. If you accept you agree to our full cookie policy. Learn more about our cookies.

 
Cookie settings