While you can use various light sources to calibrate your Alpy spectroscope, the Shelyak Alpy calibration unit makes life much simpler. It features a low cost argon-neon lamp whose spectrum is well understood. The unit is inserted within the Alpy and features a small mirror allowing you to calibrate simply and easily without trying to place light sources outside of the telescope.
For further simplicity, the Calibration unit may be combined with the SPOX which permits automation via a PC when using Shelyaks excellent Demetra software.
