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Bandpass and Edge Filters

Photonics.com
Dec 2010
Research Electro-Optics Inc. (REO)Request Info
 
BOULDER, Colo., Dec. 23, 2010 — REO has launched a range of linearly variable bandpass and edge filters useful for applications in spectrometry and temperature sensing. In these variable response coatings, the center wavelength of operation changes with position in a linear manner over the surface of the part.

In the past, high manufacturing costs for this class of filters have limited their use to a few specialized applications. The company’s volume-scalable technology enables cost-effective production of linearly variable filters over a wide range of sizes.

Bandpass filters are available for operation in the visible (380 to 760 nm), the near-infrared (600 to 1100 nm) and the mid-infrared (1.3 to 2.6 µm) spectral ranges. Nominal bandwidth is 1% FWHM of the center wavelength, with peak transmission of 60% and linearity of ±0.5%. These can be delivered on a wide array of optical glass, fused silica and other substrate materials in the 3 × 1.5- to 150 × 65-mm size ranges.

Short-wave pass and long-wave pass edge filters are available over the same spectral ranges and substrate sizes. All of the filters are fabricated using ion beam sputtering technology to minimize scatter and absorption, and to make coating response completely insensitive to changes in temperature and humidity.

The company also can supply a wide range of other linearly variable filter configurations on a custom basis.


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Photonics Buyers' Guide
Looking for Variable Filters? There are 5 companies listed in the Photonics Buyers' Guide.
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Americasbandpass filtersBiophotonicscoatingscustom filtersedge filtersFiltersfused silicahumidity-insensitiveIBSindustrialion beam sputteringlinearly variablelong-wave passmid-infrarednear-infraredoptical glassopticsProductsREOshort-wave passspectrometryspectroscopytemperature sensingtemperature-insensitiveTest & Measurementvisiblevolume-scalable

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