Specifications:

• Least Count : 1 minute of Arc.
• Collimator : adjustable to infinity, including one achromatic lens, Φ32 mm & one source slot, adjustable in width by knurled screw.
• Micrograduated slot : enabling the measurement of the
• slot opening, accuracy : 0.01 mm. Maximum opening: 1mm on 6.3mm height.
• Autocollimating view-finder : constituted of one achromatic lens & one sliding lens. Including one reticle & semi reflective device with 6V lighting enabling autocollimation experiments.
• Micrometric view-finder: enabling the projection of one divided & numbered micrometer used for the wavelength calibration & measurement.