Infra Red Linear Variable Filters




A Linear Variable Filter (LVF) is a single filter where the performance profile shifts gradually from one end of the filter to the other in a continuous manner, this is illustrated below for one covering the 2.5-5.0 µm range.



The combination of an LVF and suitable detector can replace a large number of components thus saving vast amounts in space, cost, weight and time. Vortex manufactures three stock LVF filters, they cover the following ranges:

(i) 2.5 - 5.0 µm.

(ii) 1.2 - 2.5 µm.

(iii) 0.9 - 1.70 µm.

We have the capability to manufacture custom LVF'swithin this range to suit your needs and welcome the opportunity to discuss specific applications in confidence.


Full Details


Properties of Vortex LVF’s

  • Stock filters 15 mm long x 3.5 mm wide and 0.5 mm thick (tolerance=+/- 0.1 mm)

  • Durable hard coatings passing Humidity, salt solution, severe abrasion, adhesion as per MIL C 48497

  • T peak, typically >60% across the band

  • Width of filters at 50% peak T (FWHM) = 2% of peak wavelength

  • Surface Quality better than 60-40 scratch dig

  • Blocking - Our LVF's have a blocking of OD3 within the range, however, a supplementary filter in the optical chain may be required. We can advise on this based on the detectior's sensitivity range

downloads Download the datasheet here

Applications

LVF’s can be used in hand held spectrophotometers, multi gas detectors, and any infra red based scanning applications where band-pass filters can be replaced with a single one.

Pricing

0.9 to 1.7 µm type

Product Code LVF 0.9 - 1.7 - 3.5 - 15 - 0.5

What the code means:

LVF (lower wavelength µm) _ (higher wavelength µm) _width in mm_length (mm) _thickness (mm)

All prices are in GB Pounds and are per unit.

  • 5 or less ------ £323.15 each
  • 10 off ------ £292.10 each
  • 50 off ------ £276.00 each
  • 100off ------ £215.05 each

CURRENCY CONVERTER


Please Note that for OEM/high quantity pricing, please contact us direct by telephone +44 1455 613029 or e mail Ian Reilly on ian@vortexopticalcoatings.co.uk.

1.2 to 2.5 µm type

Product Code LVF 1.2_2.5_3.5_15_0.5

What the code means:

LVF (lower wavelength µm) _ (higher wavelength µm) _width in mm_length (mm) _thickness (mm)

All prices are in GB Pounds and are per unit.

  • 5 or less ------ £358.80 each
  • 10 off ------ £324.88 each
  • 50 off ------ £307.05 each
  • 100off ------ £239.20 each

CURRENCY CONVERTER


Please Note that for OEM/high quantity pricing, please contact us direct by telephone +44 1455 613029 or e mail Ian Reilly on ian@vortexopticalcoatings.co.uk.

2.5 to 5 µm type

Product Code LVF 2.5_5.0_3.5_15_0.5

What the code means:

LVF (lower wavelength µm) _ (higher wavelength µm) _width in mm_length (mm) _thickness (mm)

All prices are in GB Pounds and are per unit.

  • 5 or less ------ £409.98 each
  • 10 off ------ £360.53 each
  • 50 off ------ £341.55 each
  • 100 off ------ £266.23 each

CURRENCY CONVERTER


Please Note that for OEM/high quantity pricing, please contact us direct by telephone +44 1455 613029 or e mail Ian Reilly on ian@vortexopticalcoatings.co.uk.