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Coating
Tempotec can provide a wide variety of coatings from simple single layer AR coatings using Mg F2 and mirror coatings to complex multilayer dielectric stacks. Typical types of dielectric coatings are BBAR, V-coatings, Dual wavelength AR coatings and HR coatings. Sharp cut-on and cut-off filters are also available.          Please contact us, if our standard coatings described in this chapter can not meet your requirements. Our engineers can design a special coating for you.
Coating Type Properties and Application Antireflection Single Layer MgF2 Applied to materials with refractive indices from 1.45 to 2.4. The most popular antireflection coating for visible. They are insensitive to change in incidence angles. Multilayer "V" Used to provide low reflectance with in a narrow durable wavelength band for most laser application. Minimum reflection can be less than 0.1% Broadband Multilayer These coatings have excellent performance over a broad spectral range broadband. Coating performance is sensitive to angle of incidence. Dual Wavelength Band Offer very low reflectance at two widely spaced wavelengths, such as Nd:YAG Laser (1064) and its second harmonic (532) . Tempotec makes this a double wavelength waveplate. Partial Reflection Narrow Band Provide 50% reflection and transmission at an angle of 45° incidence for a single wavelength. Perfect for beamsplitters application. Transmission/reflection (T/R) ratio of 20/80, or others for Beamsplitter is available upon request. Broadband Over a wide bandwidth provides 50% reflection and transmission. Tempotec can also provide coatings with different R/T ratios at and specific angle of incident. Beamsplitter Laser Line Polarization Beamsplitter High reflection for s-polarized and antireflection for p-polarized for laser application. Broadband Polarization Beamsplitter Wide wavelength bandwidth provide high reflection to s-polarized and antiflection to p-polarized Dichroic Beamsplitters Mirrors These coatings can separate the laser fundamental and the pump wavelength, or the fundamental and the second harmonic. They are specific applied to laser mirror. High Reflection Dielectric High Reflective Coatings Provide high reflectance over a broad bandwidth, and is ideal for a tunable laser or in white light applications. Metallic High Reflective Coatings Metallic coatings have low peak reflectance, mechanical durability and damage threshold, but they have extremely broadband and low cost. They are insensitivity to angle of incident light and polarization.