Quartz prism type, 0.185 to 1500 mu, w/micrometer type wavelength drive wavelength calibration chart, mtg base, 0 to 2 mm adjustable slit width, 10 mu divisions wavelength scale, f/7.6 effective aperture less than 0.6 pct at 265 mu stray light effects of adjacent radiation, 200 to 1000 manometer lumininous and radiant wavelength calibration
