Collimated Light
For collimated light sources such as lasers, the full width at half maximum (FWHM) of the diffusion angle is noted in our datasheets.
Non-collimated Light
The final output angle will vary based on the angular variation of the input source. Diffusion films will incerase the angle of the initial source, but the amount of increase will vary based on the diffusion angle chosed and the output angle of the initial source. An approximation of the final angle can be calculated using the following equation:
 The actual FWHM of the output angle will also be dependent on the output distribution of the light source.
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