Long-pass infrared filters, unlike semiconductor filters, are constructed from stacks of thin layers. OD 3 rejection in the suppression range is not as high as it is with semiconductor filters, but it has the advantage of free choice of slope position.
- Edge position:
Each wavelength between 1 µm and 20 µm (at a transmission of 5%) - Transmission:
60% – 80% in the passband, 0.1% or less in the cut-off region. The cut-off region extends to the x-ray range. The passband extends to at least double the edge wavelength. - Size:
Standard filters have a diameter of 25.4 mm and an aperture of >21 mm. Other sizes are available upon request. Square designs starting at 2 mm x 2 mm and round IR long-pass filters with a diameter of up to 100 mm can also be produced.
Online Filter Selection
Now you can check online which optical filters are in stock at our partner NOC - Northumbria Optical Coatings Ltd. You can directly place an order which, as usual, will be handled through us.
*direct link to https://www.noc-ltd.com/catalogue/
