Spectrometer

Spectrometers are made of heavy cast metal with bright plated fittings. Scale : The 150mm diameter circle with protective plastic shield is fixed to the telescope movement and the table is attached to the double ended vernier, which reads to 1 minute of arc. Collimator : Mounted on fixed and fitted with 178mm focus achromatic objectives, 25mm clear aperture. Also fitted is a unilaterally adjustable slit 7mm long. Telescope : Mounted on moveable pillar and fitted with 178mm Focus achromatic objective, 25mm clear aperture. Also fitted is a 8x Ramsden eyepiece and a glass cross line graticule. Both the telescope and collimator have rack and pinion focusing. Prism Table : The table is marked with lines to assist placing the prism with respect to the table leveling screws.