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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

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
Note:
Transmission at cut-on wavelength is 5% of peak transmission.
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 #33-967 €147,00 Qty 10+ €132,00   Request Quote  
  • 3-4 days
    ×
 
25.00 1,050.00 200 - 1050 1.00 1100 - 2100 #68-651 €311,00 Qty 10+ €280,00   Request Quote  
  • 3-4 days
    ×
 
50.00 1,050.00 200 - 1050 1.00 1100 - 2100 #68-657 €452,00 Qty 10+ €407,00   Request Quote  
  • 3-4 days
    ×
 
12.50 1,650.00 200 - 1650 1.00 1730 - 3300 #33-968 €165,00 Qty 10+ €149,00   Request Quote  
  • 3-4 days
    ×
 
25.00 1,650.00 200 - 1650 1.00 1730 - 3300 #68-652 €335,00 Qty 10+ €302,00   Request Quote  
  • In Stock
    ×
 
50.00 1,650.00 200 - 1650 1.00 1730 - 3300 #68-658 €488,00 Qty 10+ €439,00   Request Quote  
  • 3-4 days
    ×
 
12.50 2,400.00 200 - 2400 1.00 2520 - 4800 #33-969 €177,00 Qty 10+ €159,00   Request Quote  
  • 3-4 days
    ×
 
25.00 2,400.00 200 - 2400 1.00 2520 - 4800 #68-653 €347,00 Qty 10+ €312,00   Request Quote  
  • In Stock
    ×
 
50.00 2,400.00 200 - 2400 1.00 2520 - 4800 #68-659 €525,00 Qty 10+ €473,00   Request Quote  
  • 3-4 days
    ×
 
12.50 3,600.00 200 - 3600 1.00 3780 - 7200 #33-970 €188,00 Qty 10+ €169,00   Request Quote  
  • 3-4 days
    ×
 
25.00 3,600.00 200 - 3600 1.00 3780 - 7200 #68-654 €364,00 Qty 10+ €328,00   Request Quote  
  • In Stock
    ×
 
50.00 3,600.00 200 - 3600 1.00 3780 - 7200 #68-660 €580,00 Qty 10+ €520,00   Request Quote  
  • 3-4 days
    ×
 
12.50 4,500.00 200 - 4500 1.00 4730 - 9000 #33-971 €189,00 Qty 10+ €170,00   Request Quote  
  • 3-4 days
    ×
 
25.00 4,500.00 200 - 4500 1.00 4730 - 9000 #68-655 €394,00 Qty 10+ €355,00   Request Quote  
  • In Stock
    ×
 
50.00 4,500.00 200 - 4500 1.00 4730 - 9000 #68-661 €515,00 Qty 10+ €464,00   Request Quote  
  • 3-4 days
    ×
 
12.50 6,000.00 200 - 6000 1.00 6300 - 12000 #36-150 €241,00 Qty 10+ €217,00   Request Quote  
  • 3-4 days
    ×
 
25.00 6,000.00 200 - 6000 1.00 6300 - 12000 #36-151 €464,00 Qty 10+ €418,00   Request Quote  
  • 3-4 days
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50.00 6,000.00 200 - 6000 1.00 6300 - 12000 #36-152 €655,00 Qty 10+ €590,00   Request Quote  
  • 3-4 days
    ×
 
12.50 7,300.00 200 - 7300 1.00 7670 - 14600 #33-972 €241,00 Qty 10+ €217,00   Request Quote  
  • In Stock
    ×
 
25.00 7,300.00 200 - 7300 1.00 7670 - 14600 #68-656 €464,00 Qty 10+ €418,00   Request Quote  
  • 3-4 days
    ×
 
50.00 7,300.00 200 - 7300 1.00 7670 - 14600 #68-662 €655,00 Qty 10+ €590,00   Request Quote  
  • 3-4 days
    ×
 

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.

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