EISCO High Quality, Standard Spectrometer
An economically priced instrument which is nevertheless capable of much useful quantitative work. The main structural parts including the collimator and telescope bodies are in heavy castings.Scale 170mm diameter, divided 0 to 360deg x 1deg, independently rotatable with locking screw. A spring-loaded vernier scale attached to the telescope mount provides readings to 0.1deg (6 minutes of arc). Collimator mounted on fixed pillar with axis adjustment. Objective lens has 150mm focal length, an aperture of 212mm and is carried in spiral focusing system. Unilaterally adjustable slit 6mm long. Telescope mounted on moveable pillar with adjustment, locking screw, and axis adjustment. Objective lens has 170mm focal length, 21mm aperture and is carried in a spiral focusing system. Ramsden eyepiece with cross wires and locking ring focus adjustment. Prism table is provided with three levelling screws and has lines marked to assist placement of prism. Standard Accessories Includes 1-prism clamp for prisms up to 40mm high,1 diffraction grating holder, aperture 25 x 25mm, 1 small screwdriver, 1 tommy bar for axis adjustment. Supplied in strong thermocole box with working instructions.