Each material in the database has refractive index listed as a function of wavelength over a range typically required for thin film thickness measurement.
Refractive index of acrylic sheet.
To make the most effective and efficient use of edge lighted acrylic shapes fabricators.
Below are files of complete refractive index and extinction coefficients.
When the viewer is looking straight through the acrylic there is no angle shift distortion seen.
Using snell s law it is possible to calculate the exact view angle through the acrylic.
When refractive index surface reflectance and absorbance of the sheet are known the designer can create displays that appear to be self illuminated.
Many 3d applications these days allow you to input actual ior values in order to achieve a more accurate representation of surfaces during rendering of your 3d models.
Nas is a copolymer of 70 polystyrene and 30 acrylic having a refractive index 588nm of 1 564.
Pmma acrylic polymer has a refractive index of 1 49 and a density ranges between 1 17 1 20 g cm 3 which is half less than that of glass.
The optical properties of plexiglas sheet make it ideal for edge lighting applications.
If the file is not available for download you can request our proprietary file by clicking request.
Poly methyl methacrylate is produced by free radical polymerization of methyl methacrylate in mass when it is in sheet form or suspension polymerization.
Many materials have a well characterized refractive index but these indexes depend strongly upon the frequency of light.
Index of refraction values ior for use with 3d modeling rendering and animation applications.
This optics material is less expensive than acrylic.
Standard refractive index measurements are taken at the yellow doublet sodium d line with a wavelength of 589 nanometers.
Over the past few years i have been collecting ior index of refraction values i can find for use in 3d rendering applications.
There are also weaker dependencies on temperature pressure stress etc as well on precise material compositions presence of dopants etc.
For a typical sample of acrylic the refractive index and extinction coefficient at 632 8 nm are 1 48899 and 0.
Both acrylic acid ch 2 chco 2 h and methacrylic acid ch 2 c ch 3 co 2 h have been synthesized since the mid 19th century but the practical potential of materials related to these compounds became apparent only about 1901 when german chemist otto röhm published.
One of our gs plastic optics engineers will work closely with you to learn more about your projects specific technical needs.
The table below contains links to refractive index data for common materials.
.PNG)
