The determination of the direction of the optic axis of uniaxial crystalline materials
Abstract
The birefringence of crystalline substances in general, and of sapphire in particular, is described. A test is described whose purpose is to determine the direction of the optic axis of a cylindrically machined single crystal of sapphire. This test was performed on the NASA Lewis sapphire cylinder and it was found that the optic axis made an angle of 18 deg with the axis of symmetry of the cylinder.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- April 1986
- Bibcode:
- 1986STIN...8622915L
- Keywords:
-
- Birefringence;
- Crystal Optics;
- Optical Measurement;
- Sapphire;
- Axisymmetric Bodies;
- Cylindrical Bodies;
- Machining;
- Single Crystals;
- Instrumentation and Photography