the optical axes of a refractive index tensor, the directions along which the two refractive indices coincide and the birefringence vanishes; MATLAB’s opticalAxis

Syntax

oA = rI.opticalAxis()

One axis for a uniaxial, two for a biaxial crystal.

oA = opticalAxis(rI, tol=1e-4)

Principal indices closer than 1e-4 taken as equal.

Description

An isotropic tensor, all three principal indices equal, has no optical axis and gives an empty list.

Input

`rI`	refractiveIndexTensor

Keywords

keyword	default	description
`tol`	`1e-08`	the difference below which two principal indices count as equal

Output

`oA`	the optical axes as axes in the frame of rI

Used on

BirefringenceDemo

MATLAB’s refractiveIndexTensor.opticalAxis

source

Citing this page. This page is part of the documentation of MTEX, a free and open source MATLAB toolbox for analyzing and modeling crystallographic textures. It was written by The MTEX Developers and is published at https://mtex-toolbox.github.io/refractiveIndexTensor.opticalAxis_py.html. If you use MTEX, or reuse text or figures from this page, in your research, please cite

F. Bachmann, R. Hielscher, H. Schaeben: Texture Analysis with MTEX - Free and Open Source Software Toolbox, Solid State Phenomena 160 (2010), 63-68. 10.4028/www.scientific.net/SSP.160.63

BibTeX

@article{bachmann2010mtex,
  author  = {F. Bachmann and R. Hielscher and H. Schaeben},
  title   = {Texture Analysis with MTEX - Free and Open Source Software Toolbox},
  journal = {Solid State Phenomena},
  volume  = {160},
  pages   = {63-68},
  year    = {2010},
  doi     = {10.4028/www.scientific.net/SSP.160.63},
  url     = {https://doi.org/10.4028/www.scientific.net/SSP.160.63}
}

Other papers describing specific MTEX methods are listed under Publications — please cite the one that best fits your application. The MTEX source code is licensed under the GNU General Public License v2.0; the text and figures of this documentation are licensed under CC BY 4.0, which permits reuse — including by automated systems — provided The MTEX Developers and this page are credited.

refractiveIndexTensor.opticalAxis