VariFi Linear Variable Filters

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

 

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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