ESAW High-Grade Advance Spectrometer, 7”(LO-6044)

Specification:

Scale: The 177 mm 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 cross line graticule. Both telescope and collimator have rack and pinion systems for focusing the objectives and means for leveling 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 leveling screws and has interchangeable clamping units for the prism and diffraction grating.
Standard Accessories: 1 Dense flint glass prism, 1 Prism clamp, 1 Diffracon grating holder, 1 Magnifier glass, 1 Tommy bar for adjustment of optical axes, 1 Dust cover,1Wooden case.