Spectrometer By Sigma Instruments Co.

It has all the good qualities which a functional spectrometer should have. SIGMA spectrometers are exclusively provided with built in light system to read the vernier scale in the dark room without any difficulty (no outside lamp is required.)

Technical specification :
1. Best quality achromatic objectives of 7a focal length and 1a diameter and 10x eye piece with sharp cross lines are used.
2. Sharp adjustable brass slit is provided on the collimator tube.
3. Collimator and telescope tubes are provided with smooth rack and pinion motions.
4. Central cone bearing system gives smooth round motion to the moving body on which scale and telescope are fixed.
5. The central brass axle on which the verniers are mounted is tapered in shape ensuring accuracy for all times.
6. A spring loaded prism table is very accurately placed in the center of the scale.
7. Sigma spectrometers are checked tested and aligned in such a way that optic axis of collimator and telescopes pass through the vertical line in the center of the prism table through the same point at all positions of the telescope.