Constant Deviation Spectrograph
Collimating Tube : (Material: Brass Pipe) O.D.: 50mm I.D.: 44mm for fitting collimating lens
-It is provided with rack & pinion arrangement and slit.
-Slit is of circular type.
-The jaws of the slit are optically ground.
-It is provided with Holfmann's Diaphragm.