PHYWE Spectrometer 2

PHYWE Spectrometer 2

Light from an adjustable entrance slit of 6 mm length and 0…1.5 mm width is parallelised by the ocular telescope. The parallelised beam passes a grating or a prism on a rotating table, which can be adjusted in height and levelled with three spring fitted adjustment screws. The ocular telescope with reticule is fitted on a rotating mechanism. Angle scales allow for angle reading with half an arc minute (0° 0′ 30″) accuracy of both the angle between collimator and ocular telescopes and ocular telescope – which is fixed with the device – and rotating table. The angle scales are two per scale and opposite offset by 180°. The zero point of the scale for the rotating table is arbitrarily selectable and fixable. The telescope entrance lenses have a diameter of 32 mm and the ocular (15 x) has a pupil of 6 mm width. Both rotating table and ocular telescope have a backlash free fine adjustment mechanism that allows reproducible rotation to half arc minute accuracy.