Infrared Linear Variable Filters (LVF)

AMS item number: SW11881

0.9-5.0 µm; Transmission 50%-75%; FWHM 1%, 2% * Center λ; Dimensions 15x3.5 mm; Thickness 0.5... more

Product information "Infrared Linear Variable Filters (LVF)"

0.9-5.0 µm; Transmission 50%-75%; FWHM 1%, 2% * Center λ; Dimensions 15x3.5 mm; Thickness 0.5 mm; Surface Quality <60-40 Scratch-Dig

Infrared linear variable filters (LVF) are narrow band filters where the center or peak wavelength changes continuously along its length from one side to the other – and across the device’s full wavelength range. Vortex’s linear variable filters feature a narrow band profile with a “full width half maximum” (FWHM) bandwidth of 1% or 2% of peak wavelength.

All of the Vortex infrared linear filters exhibit high angular tolerance, extremely low change with temperature and very high resistance to thermal shock. Our range of standard infrared linear variable filters allows customers to explore the technology but at a relatively low cost:

Standard Infrared Linear Variable Filters (LVF)
Part Number	Wavelength Range	Bandwidth (as a % of Center Wavelength)	Basic Blocking Range	Gradient of Change	Dimensions (L x W x T)
LVF 0.9-1.7-3.5-15-0.5-2%	0.9-1.7 µm	2% (Generation 1)	UV-1.8 µm, OD>2.5 Ave. Outside the Transmission Band	60 nm/mm	15 x 3.5 x 0.5 mm
LVF 1.3-2.6-3.5-15-0.5-2%	1.3-2.6 µm	2% (Generation 1)	1.2-2.6 µm, OD>2.5 Ave. Outside the Transmission Band	85 nm/mm	15 x 3.5 x 0.5 mm
LVF 2.5-5.0-3.5-15-0.5-2%	2.5-5.0 µm	2% (Generation 1)	1.8-5.5 µm, OD>2.5 Ave. Outside the Transmission Band	165 nm/mm	15 x 3.5 x 0.5 mm
LVF 0.9-1.7-3.5-15-0.5-1%	0.9-1.7 µm	1% (Generation 2)	UV-1.8 µm, OD>3.5 Ave. Outside the Transmission Band	60 nm/mm	15 x 3.5 x 0.5 mm
LVF 1.3-2.6-3.5-15-0.5-1%	1.3-2.6 µm	1% (Generation 2)	1.2-2.6 µm, OD>3.5 Ave. Outside the Transmission Band	85 nm/mm	15 x 3.5 x 0.5 mm

Vortex also designs and manufactures custom infrared LVFs, featuring different bandwidths, sizes (e.g. to suit the user’s detector window dimensions), etc. to meet your needs. Contact the AMS Technologies filter experts today to discuss a unique customized linear variable filter, designed, specified and manufactured to your application’s requirements.

Key Features:

Peak Wavelength Changes Continuously With Distance Across the LVF’s Length
Transmission: 50% to 75% Across the Band
To Extend the LVF’s Blocking Range, a Suitable Bandpass Filter Can Be Added
Substrate Dimensions (LxW): 15 mmx 3.5 mm
Substrate Thickness: 0.5 mm
Surface Quality: <60-40 Scratch-Dig

Key Features of Generation 2 Infrared Linear Variable Filters:

2 Ranges Covered, 0.9-1.7 µm and 1.3-2.5 µm
Bandwidth (FWHM): 1% x Center Wavelength
Blocking Greater Than OD 3.5 Average Outside Passband
Specifically for Systems Where Higher Signal-to-noise Ratio is Critical

Key Features of Generation 1 Infrared Linear Variable Filters:

3 Ranges Covered, 0.9-1.7 µm, 1.3-2.5 µm and 2.5-5.0 µm
Bandwidth (FWHM): 2% x Center Wavelength
Blocking Greater Than OD 2.5 Average Outside Passband

Applications: Mini-spectrometers; Multi-gas Analysis; Industrial Process Monitoring; Other

Product Group:

Infrared Linear Variable Filters (LVF)

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Infrared Linear Variable Filters (LVF) Vortex Datasheet

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