Suitable for more advanced work High Grade Research
Heavt cast aluminium alloy structure
Independent telescope & table movement
Double ended verniers reading to 30 seconds of arc
CNC turned spindle set and other components.
Scale 177mm diameter circle is fixed. The table and telescopic movements are completely independent of each other. Both movements can be read to 30sec. of arc by means of double ended verniers. Both rotations have independent fine adjustment screws. Release of a clamping screw enables coarse adjustment to be made manually and fine adjustment is made by engaging the clamping clamping screw and moving the tangent screw.
Collimator Mounted on a fixed pillar and fitted with 175mm focus achromatic objective with 32mm clear aperture.
Telescope Mounted on a movable pillar and fitted with 175mm focus achromatic objective with a 32mm clear aperture and at the other end a 6mm long unilaterally. Also fitted is 15x Ramsden eyepiece and a glass cross line graticule. Both telescope and collimator have rack and pinion systems for focusing the objectives and means for levelling their optical axes and squaring
Prism Table with 85 mm diameter is marked with lines to assist placing the prism with respect to the table levelling screws and has interchangeable clamping units for the prism and a diffraction grating.
Standard Accessories Include 1 Prism clamp, Diffraction grating holder, 1 Magnifier glass, 1 Tommy bar for adjustment of optical axes, 1 Dust cove, 1 Wooden case.