MSE PRO IR Interference Filters

MSE PRO™ IR Interference Filters

MSE Supplies offers IR Interference Filters, which are fabricated using a series of thin layers of various dielectric materials sandwiched between glass substrates. When multi-wavelength light passes through the filter, interference occurs due to differences in refractive index, resulting in very high transmittance for certain wavelengths, while other wavelengths are either reflected or absorbed. For a given wavelength, a very narrow bandwidth (3nm-10nm) can be obtained. Optical interference filters are angle-sensitive and should be used with normal or near-normal incident light. If the incident angle exceeds 20 degrees, it is essential to specify s-polarization, p-polarization, or random polarization (the average of s and p polarization) when ordering. Filters for major laser wavelengths are available from stock, while those for other wavelengths and dimensions can be custom designed. The interference filters are extremely durable and can withstand repeated cleaning.

Each filter comes in an anodized aluminum housing for protection against humidity and handling. The highly reflective side of the filter should generally face the light source to minimize the thermal load on the absorptive glass and epoxies.

MSE Supplies can offer a variety of optical elements, with different focal length and coating options. Please contact us for customization or bulk orders. 

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