HOW MUCH YOU NEED TO EXPECT YOU'LL PAY FOR A GOOD BIREFRINGENT CRYSTAL

For an optical part with a few birefringence, you can specify the retardance, which can be the real difference in period shifts for the two polarization Instructions.The lower area with the Michel-Levy chart (x-axis) marks the orders of retardation in multiples of approximately 550 nanometers. The area in between zero and 550 nanometers is called t