| GENERAL CHARACTERISTICS ITEM DESCRIPTION | 16 IN. H,18 IN. W,24 IN. L; 110 VAC,1 KW; PASCHEN MTG OF CONCAVE DIFFRACTION GRATING; FOCAL LENGTH 42.5 CM,15000 LINES/IN.,SIZE OF RULED SURFACE 20 X 25 MM; DISPERTION 40.5 ANGSTROMS/MM; WAVELENGTH REGION 4000-7000 ANGSTROMS |