i am using Avantes spectrometer with 0.6 nm resolution to analyse spectral lines. but it is not enough. i want to build my own spectrometers which work in a narrow wavelength about 20 nm.
i did it with fabry-perot and monochromator but it they had not enough resolution. i used 1200lines/mm grating, hydrogen lamp and CCD camera as detector.
is there any suggestion?
thank you