- Suitable for more advanced work
- Heavy cast aluminium alloy structure
- Independent telescope and table movement
- Double ended verniers reading to 30 seconds of arc
- CNC turned spindle set and other components
Scale : The 177mm diameter circle is fixed and both the telescope and table are fitted with independent double-ended verniers reading to 30 seconds of arc and have independent fine and coarse movements. While coarse adjustment is done by releasing the clamping screw and moving by hand, fine adjustment is made by engaging the clamping screw and moving the tangent screw.
Collimator : Mounted on a fixed pillar. At one end is fitted 32mm dia clear aperture, 175mm focus achromatic objective, and at the other end a 6mm long unilaterally adjustable slit.
Telescope : Mounted on a movable pillar. At one end is fitted 32mm dia clear aperture 175mm focus achromatic objective, and at the other end a 15X Ramsden eyepiece and a glass crossline graticule.
Both telescope and collimator have rack and pinion systems for focusing the objectives and means for levelling their optical axes and squaring them to the axis of rotation.
Prism Table : The 85mm diameter table is marked with lines to assist positioning of the prism with respect to levelling screws, and has interchangeable clamping units for the prism and diffraction grating.
Standard Accessories Supplied : 1 Prism Table, 1 Prism Clamp, 1 Diffraction Grating Holder.
Optional Accessories : Dense flint glass prism, Magnifier glass, Tommy bar for adjustment of optical axes.