Tian Cheng Optics Co., Ltd.

TC OpticsInterference Filter

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An Interference Filter reflects one or more spectral bands or lines and transmits others, while maintaining a nearly zero coefficient of absorption for all wavelengths of interest. It consists of multiple thin layers of dielectric material having different refractive indices. There also may be metallic layers.

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  • Material Fused Silica
  • Diameter Tolerance +0.0,-0.2 mm
  • Ring Diameter (φ) 25.4±0.2 mm
  • Ring Thickness (T) 6 mm
  • Surface Quality 60-40 scratch and dig
  • FWHM 10 nm
  • Clear Aperture >φ20 mm
  • Wavelength Tolerance ±2nm
  • Mounting Material Black anodized aluminum

Note: Central wavelength from 200 nm to 1000 nm are available upon your request. FWHM 15nm, 20nm and 30nm are also available upon your request.