Chrys et al,
Images acquired by a SHG.
This is a combination of the spectroscope and a telescope.
The solar disk is scanned by the spectroscope slit and recorded as an SER video. The software (INTI) then corrects any geometric issues and creates an images of the Sun in the selected wavelength. i.e. Ha, Na, Mg, Hb, CaK etc. etc.
There's a description of the MiniSHG on the astronomicalspectroscopy group:
https://groups.io/g/astronomicalspec.../message/17120
Basically a small spectrograph which fits in one hand (!) and weighs about 1.1Kg.