Ajax Scientific LI320-0000 Advanced Spectrometer, 10x Ramsden Eyepiece, Achromatic Objectives, 178mm Focal Length, 0.5 Graduations, 30 Arc-Second Vernier Scale

Consists of a heavy cast base and a pillar for collimator support. The telescope arm moves along a fixed circular plate 150mm diameter graduated in degrees. This Advanced Spectrometer has a double ended vernier for better and accurate measurements, with a least count of 30”. Fine adjustment is accomplished by using a knob while the coarse adjustment can be done by hand. Both the collimator and the telescope are mounted with an axis adjustment system. The telescope has a 10X Ramsden eyepiece and is fitted with a cross hair reticle. Both the telescope and the collimator are fitted with coated achromatic objectives of 178mm focal length and 32mm diameter, providing light for a brighter and sharper image. The focussing is done by a concealed rack and pinion. The collimator slit 6mm long, is specially designed for retention of initial accuracy during the life of the instrument. The prism table 75mm diameter is held with the help of a clamping screw enabling the table to be rotated in any direction. It has lines and concentric rings marked to assist positioning of prism in relation to levelling screws. It is fitted with a diffraction grating holder of aperture 25mm x 25mm and a clamp for holding prisms (not included) up to 38mm high.

What's in the Box?

• Spectrometer
• Diffraction grating
• Polystyrene foam case
• Instructions