Optical Properties dialog
The fields in this dialog describe the optical properties of the material resin and how it behaves.
This dialog provides data for the stress-optical features of a transparent thermoplastic material. These properties are required for birefringence analyses.
| Dialog component | Explanation |
|---|---|
| Refractive index of unoriented material | This field describes the proportional slowing of light transmitted through the material. A higher refractive index is usually associated with a denser material. |
| Stress-Optical coefficient C1 | Enter the Stress Optic coefficient of the material, in Brewsters. The stress optic coefficient measures the susceptibility of a material to photoelasticity, which is used to determine the stress distribution of the material. The unit has dimensions reciprocal to those of stress. |
| Viscoelastic spectrum at Tref | The viscoelastic retardation spectrum at the reference temperature relates the compliance (inverse of stiffness) of a material with its retardation time. |
| Viscoelastic WLF model for temperature shift | Enter the coefficients of the WLF model and the temperature at which they were determined. |
| Spectrum correction factor | Use this option to select a spectrum correction factor that provides a better match between experimental birefringence results and predicted values. |