VariFi Linear Variable Filters

Excelitas VariFi™ linear variable filters provide a unique solution for controlling background noise and higher-order effects in spectrometers. Our proprietary technology enables cost-effective production of linearly variable filters over a wide range of sizes. These filters are available in the visible, near infrared, and mid-infrared spectral ranges and can be delivered on various substrate materials.

Excelitas manufactures spatially variable response coatings in which the center wavelength of operation changes with position in a linear manner over the surface of the optic. VariFi Linear Variable Filters are offered in narrow band pass, long pass, short pass, and order sorting filters.

Typical Specifications
Resolution	1 – 2% FWHM
Linearity	±1.0%
Size	60 mm x 25 mm to 3.0 mm x 1.0 mm
Surface Quality	40-20
Temperature Range	−196 °C to 400 °C
Attenuation	> OD3
Full tunability in your system by using the following Linear Variable Filters:	Short Wavelength Pass filter: Edge to be tuned from 380 – 700 nm	Long Wavelength Pass filter: Edge to be tuned from 300 – 850 nm

SPECIFICATIONS

Typical Specifications
Resolution	1 – 2% FWHM
Linearity	±1.0%
Size	60 mm x 25 mm to 3.0 mm x 1.0 mm
Surface Quality	40-20
Temperature Range	−196 °C to 400 °C
Attenuation	> OD3
Full tunability in your system by using the following Linear Variable Filters:	Short Wavelength Pass filter: Edge to be tuned from 380 – 700 nm	Long Wavelength Pass filter: Edge to be tuned from 300 – 850 nm

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VariFi Linear Variable Filters

SPECIFICATIONS

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