Spectrometer, Intermediate

An intermediate spectrometer for scoool and college use. The scale comprises a150mm diameter circle with protective plastic shield is fixed to the telescope movement and the table is attached to the double ended vernier which reads 1 minute of the arc. Both telescope and table rotations have fine adjustment screws, and release of a clamping screw enables adjustments of both movements to be made by hand. The collimator is mounted on fixed pillar and fitted with 178mm focus achromatic objective, 25mm clear aperture. Also fitted is a unilaterally adjustable slit 7mm long. The prism table is marked with lines to assist placing the prism with respect to the table levelling screws. the telescope is mounted on moveable pillar and fitted with 178mm focus achromatic objective, 25mm clear aperture. Also fitted is a x8 Ramsden eyepiece and a glass cross line graticule. Both the telescope and the collimator have rack and pinion focusing. Standard accessories supplied: 1 prism clamp, 1 diffraction grating holder, 1 watchmaker