Spectrometer

Accurate but simplified model for student use.

Telescope vernier reads to 1' of arc.A model for student use, with an optical system equivalent to that more advanced models, thus permitting many quantitative experiments.

Graduated disc 127 mm. diameter fixed to table, double ended vernier, to read to l' of arc, attached to telescope. Both telescope and table have fine-adjustment screws and release of clamping screw enables coarse adjustments to be made by hand.

Telescope and Collimator are fitted with 178 mm. focal length, 25 mm. app. aperture achromatic objectives and have rack and pinion focusing: telescope fitted with x15 Ramsden eyepiece and cross-line reticule: collimator with adjustable slit, length 6mm; mounting of telescope and collimator permits accurate levelling of axis and squaring to axis of rotation. telescope fitted with x15 Ramsden eyepiece and cross-line reticule: collimator with adjustable slit, length 6mm; mounting of telescope and collimator permits accurate levelling of axis and squaring to axis of rotation.

The spectrometer table, marked with lines to assist positioning of prism in relation to leveling screws, has interchangeable clamping units for prism and diffraction grating