This page shows the results of measuring the refractive index with three wavelengths d line c line f line of acrylic resin pmma molded aspheric lens.
Acrylic sheet refractive index.
With using refractometer kpr 300 we can know the relation between refractive index and wavelength δn δλ by multi wavelength measurement.
Poly methyl methacrylate is produced by free radical polymerization of methyl methacrylate in mass when it is in sheet form or suspension polymerization.
There are also weaker dependencies on temperature pressure stress etc as well on precise material compositions presence of dopants etc.
Many materials have a well characterized refractive index but these indexes depend strongly upon the frequency of light.
For a typical sample of acrylic the refractive index and extinction coefficient at 632 8 nm are 1 48899 and 0.
These plastic materials can easily be thermoformed without any loss in optical clarity.
For edge lighting applications.
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.
Over the past few years i have been collecting ior index of refraction values i can find for use in 3d rendering applications.
Standard refractive index measurements are taken at the yellow doublet sodium d line with a wavelength of 589 nanometers.
It s what we deliver.
Refractive index database the table below contains links to refractive index data for common materials.
Each material in the database has refractive index listed as a function of wavelength over a range typically required for thin film thickness measurement.
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.
When refractive index surface reflectance and absorbance of the sheet are known the designer can create displays that appear to be self illuminated.
Below are files of complete refractive index and extinction coefficients.
Kpr 300 can also measure resin samples that cannot be processed and be measured.
Pmma grades allow 92 of light to pass through it which is more than glass or other plastics.
To make the most effective and efficient use of edge lighted acrylic shapes fabricators must consider the following basic design factors.
Index of refraction values ior for use with 3d modeling rendering and animation applications.
If the file is not available for download you can request our proprietary file by clicking request.
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