The client required the supply of a continuous light source with a tunable wavelength. The wavelength range had to be at least 200-2000 nm.
It had to include a monochromator fitted with at least three diffraction gratings with a spectral efficiency characteristic of more than 40% over the entire 200-2000 nm range.
The monochromator had to be equipped with variable slits and computer-controlled filters to remove higher diffraction orders.
The output of the system had to be efficiently coupled to an optical fibre that guaranteed a transmittance of at least 30% m-1i at 200 nm.