› Forums › Spectroscopy › LHires experience – and some issues… › zero order star test
7 August 2018 at 11:55 am
#579829
Robin Leadbeater
Participant
>A possible test for this could be to check the zero order image of a star without the slit in place. In this configuration the grating is effectively a mirror so the image should be round. I have not tried this though.
Actually, checking back I see I did run this test. (though only after I had cured the astigmatism.) The test report is attached.
Cheers
Robin