Spectroscope for direct reading of gem absorption lines from red to blue colours (700-400nm).
- AMICI Prism spectroscope optical system with 7° prism dispersion C-F
- Directly readable wavelength scale 700 - 400nm. Spectral colour distribution: red left side, blue right side. Deliniation intervals 10nm.
- Precision slit, fine adjustable.
- Dust protection by front glass.
- Dial ring for stepless adjustment from 2 - 0.01mm.
- Slide the eyepiece draw tube to focus lines and bands.
- Slide the scale draw tube for a focused scale.
- Adjustment screw to calibrate the scale to the 589nm wavelength of sodium light.