Product Announcement from Epoxy Technology
Index of Refraction & Spectral Transmission play a critical role in optoelectronic applications involving epoxies.
Index of Refraction is the measurement of the speed of light within a certain substance. Most epoxies have a refractive index range from 1.50 to 1.57.
In order to select the best optical grade adhesive, users need to specify the spectral transmission versus wavelength targets. As an example, it is common for a given epoxy to have a characteristic of being infrared transparent, but visible light opaque. It is important to remember that epoxies will not provide significant optical transmission <400nm, since these are the absorption bands needed to cross-link the epoxy.
For more information on our Tech Tips or interest in our products, please visit our Web site at epotek.com.
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