A SECRET WEAPON FOR BIREFRINGENT CRYSTAL

For an optical part with a few birefringence, one can specify the retardance, which is the main difference in period shifts for The 2 polarization directions.The lessen portion with the Michel-Levy chart (x-axis) marks the orders of retardation in multiples of close to 550 nanometers. The world amongst zero and 550 nanometers is recognized as the i