How can we improve the performance of PARISS when it is already pumping light like a spectrometer on steroids?
curved prism in the PARISS system – click here Compare this to the average diffraction grating that delivers a maximum efficiency of about 60 to 65%, at only one wavelength (the “Blaze” wavelength). At other wavelengths efficiency typically decreases rapidly. OK, I know you sometimes hear claims of higher diffraction efficiency, and it sometimes happens – but mostly it does not. Unless each grating is selected, and supplied with its own efficiency curve certificate, for both perpendicular and parallel polarized light, and also shows the serial number of the part that you received, you have a right to be doubtful. Grating efficiency is analogous to the noise and QE of a PMT– typical values vary widely, unless selected, tested and certified. The efficiency of a diffraction grating varies with polarization…the only debate is how much. Prisms never loose light due to polarization issues or higher order diffraction! Back to top • Amazing spectral range: 365 to 920 nm, simultaneously, with
