Hacking HiVIS

I went to the summit with Z tasked with turning HiVIS into LoVIS. We wanted to implement a low-resolution mode by bypassing the echelle (high-angle grating). It was pretty simple to implement and align. And there's a ton of light now in a low-resolution spectrum!

First - make a mirror mount out of some metal and drill some holes in it. Then glue on your favorite flat mirror. Use set screws and nuts as a kinematic mount for alignment.


Then pull a slit mirror and rotate it.Put in the flat mirror to bypass the echelle then align everything so that you turn your old cross-dispersed echelle spectrograph.....
into a simple low-resolution spectrograph.

It was a lot of fun getting this to work.....