Hi All
I have built a UVEX spectrograph. I purchased a 600l/mm and 1200 l/mm grating but have only installed the 1200 so far.
I had to modify the design somewhat as I did not want to buy a new slit so am using a slit that was designed for my LISA. I had it spare as I had replaced it with a photometric slit.
The slit is larger than the one in the UVEX design so I had to create a mounting block that would still fit the UVEX box. I'm not clever enough to modify the 3D printing file so just made one out of aluminium using a mill. I also wanted a guiding module. I also made this out of aluminium based on the design from the inside of the 3D printed calibrex module. http://spectro-uvex.tech/?p=1365&lang=en
Because of the difference in the thickness of the slit it has been difficult to achieve correct focus with the camera. I did not have enough infocus so had to modify the slit mount to move it further in. I have mostly succeeded in aligning the mirrors but they are not perfect yet. I am using an ASI183MM as the camera. The spectra is very good in the middle 3/4 of the detector but the edges clearly softer.
The test spectra are of the near UV and Ha region.
Terry
First Spectra from my new UVEX
Design, construction, tuning of spectroscopes
Information and discussion about softwares (telescope remote, autoguiding, acquisition, spectral processing ...)
Information and discussion about softwares (telescope remote, autoguiding, acquisition, spectral processing ...)
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