Optical Application

The clarity of a material can be evaluated using different properties: percentage of light transmission, refractive index, percentage of haze ,Abbe number, and yellowness index. In assessing the optical quality of Liquid Silicone Rubber (LSR) vs. glass based on these metrics, optical LSRs are superior in all except haze and yellowness index, where glass has better values. Overall, the optical properties of a modified optical LSR, are generally better than PC and PMMA polymers, and glass as well.

Silicones offers an array of potential solutions for a variety of applications, including:

  • LED
  • Displays and projectors
  • Optics and Lighting
  • Solar Energy
Category Property Opitcal LSR PC PMMA Glass
Properties of optical clarity, 2mm Transmission (%) 94 86-94 89-92 92
Index of refraction (RI) 1.41 1.59 1.49 1.5 ~ 1.6
Haze(%) <1 1-3 2-4  
Abbe number 50 34 57 39 ~ 59
Yellowness index <1 1.0 ~ 3.0 1.0 ~ 3.0 -
Durability Heat Resistance Excellent Poor Poor Excellent
UV Resistance Excellent Poor Good Excellent
Design Freedom Complex/micro design Excellent Good Good Poor
Material Flexibility Excellent Poor Poor Poor
Light weight design Excellent Good Good Poor
Flexible Lighting
Optical Application
Optical Application