| http://www.w3.org/ns/prov#value | - The spectrometer according to claim 13, further including a first collimating lens for directing said radiant energy onto said blazed echelon and a second collimating lens for directing said spectrum of overlapping spectra onto said blazed grating disperser, said first collimating lens and said second collimating lens having minimal spherical aberrations, thereby achieving a steep bandpass profile
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