Sometimes it is useful to visualize an optical design and calculate the optical quality. A free program for doing that is BEAM4 from http://www.stellarsoftware.com/

I had used an earlier test version, but now it is available as a free version and more user friendly, so I gave it a try.

I chose the Czerny spectrograph example and modified it to calculate spot diagrams.

czerny2opt
first result, optimized for resolution
czerny2opt_spot
quick spot diagram, only a few rays calculated, showing nicely the astigmatism of this design (focus optimized for spectral resolution)

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s