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Bandpass, Edge Filters

Research Electro-Optics Inc. (REO)Request Info
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REO has launched linearly variable bandpass and edge filters 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 these kinds 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% full width half maximum of the center wavelength, with peak transmission of 60% and linearity of ±0.5%. Short- and long-wave-pass edge filters also are available over the same spectral ranges and substrate sizes.

Photonics Spectra
Feb 2011

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