SPECTROMETER ADVANCED

Stable Heavy cast-iron base, The main scale (diameter 150 mm ) is divided 0 to 360°and fixed to a table that also holds the telescope. There are two verniers reading up to 1 minute of arc, located 180° apart at opposite sides of the main scale. Both vernier are visible through two protective acrylic windows. Telescope Mounted on a movable pillar, the telescope has a fine adjustment screw, locking screw and axis adjustment. Achromatic objective of focal length 178 mm. Rams den eye-piece 15 X with cross-line graticule. With rack & pinion focusing. Collimator has achromatic objective of focal length 178 mm. Rack & pinion focusing. Adjustable slit, length 6 mm , is made of stainless steel.
Prism Table Marked with grooved lines to assist positioning of prism in relation to leveling screws. Has interchangeable clamping units for prism and diffraction grating. Packed in wooden case.