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Infrared (IR) Longpass Filters

Infrared (IR) Longpass Filters

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  • Coated on Silicon or Germanium Substrates
  • Ideal for Isolating Broad Spectral Regions
  • Durable, First-Surface Coatings

Common Specifications

Note:
Transmission at cut-on wavelength is 5% of peak transmission.
Thickness (mm):
1.00
Thickness Tolerance (mm):
±0.2
Parallelism (arcmin):
<10
Clear Aperture (%):
90
Optical Density OD (Average):
≥3.0
Coating:
Traditional Coated
Surface Quality:
80-50
Transmission (%):
>85
Surface Flatness (P-V):
3 - 5λ
Operating Temperature (°C):
-62 to +71

Products

Dia. (mm)  Cut-On Wavelength (nm)   Blocking Wavelength Range (nm)   Thickness (mm)   Transmission Wavelength (nm)   Compare   Stock Number   Price  Buy
12.50 1,050.00 200 - 1050 1.00 1100 - 2100
25.00 1,050.00 200 - 1050 1.00 1100 - 2100
50.00 1,050.00 200 - 1050 1.00 1100 - 2100
12.50 1,650.00 200 - 1650 1.00 1730 - 3300
25.00 1,650.00 200 - 1650 1.00 1730 - 3300
50.00 1,650.00 200 - 1650 1.00 1730 - 3300
12.50 2,400.00 200 - 2400 1.00 2520 - 4800
25.00 2,400.00 200 - 2400 1.00 2520 - 4800
50.00 2,400.00 200 - 2400 1.00 2520 - 4800
12.50 3,600.00 200 - 3600 1.00 3780 - 7200
25.00 3,600.00 200 - 3600 1.00 3780 - 7200
50.00 3,600.00 200 - 3600 1.00 3780 - 7200
12.50 4,500.00 200 - 4500 1.00 4730 - 9000
25.00 4,500.00 200 - 4500 1.00 4730 - 9000
50.00 4,500.00 200 - 4500 1.00 4730 - 9000
12.50 6,000.00 200 - 6000 1.00 6300 - 12000
25.00 6,000.00 200 - 6000 1.00 6300 - 12000
50.00 6,000.00 200 - 6000 1.00 6300 - 12000
12.50 7,300.00 200 - 7300 1.00 7670 - 14600
25.00 7,300.00 200 - 7300 1.00 7670 - 14600
50.00 7,300.00 200 - 7300 1.00 7670 - 14600

Product Details

Infrared (IR) Longpass Filters provide a sharp cut-off below a particular wavelength. Often used for order sorting, they isolate broad regions of the spectrum, simultaneously providing high transmission of desired energy, and deep rejection of unwanted energy. These filters are constructed of hard, durable first-surface dielectric coatings on optical-quality IR-transmitting substrates. Infrared (IR) Longpass Filters are able to withstand normal cleaning and handling associated with any high-quality optical component because of their make-up. These filters are particularly useful for FTIR spectroscopy and Thermal Imaging Applications. For custom sizes and coating requirements, please contact our Sales Department.

Technical Information