Standard IR Long Pass Filters

Long wave pass 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.

Constructed of hard, durable first-surface dielectric coatings on optical-quality IR-transmitting substrates, these filters will withstand normal cleaning and handling associated with any high-quality optical component. 

For your convenience and economy, we offer the filters in two standard sizes: 25mm and 50mm dia. However, we can produce custom sizes and shapes, as well as custom optical characteristics. Contact our technical sales department for a quotation.

We also offer long pass filter in the UV and visible wavelength ranges, including steep-edge long pass filters.

Can't find what you're looking for? Feel free to contact us. Also, check our surplus listings for more options.

 

General Specifications:

Thickness: 1.0±0.2mm
Diameter Tolerance:+0/-0.1mm
Min. Clear Aperture: 90% of outside dimension
Substrate Material: Silicon or Germanium
Flatness: 3-5 waves at cut-on W/L
24-hour humidity:per MIL-C-48497A
Operating Temperature:-62°C to +71°C
Parallelism:<10 arc minutes
Transmission (Ave):>85% from 1.05 x cut-on to 2.0 x cut-on
Rejection (Ave):<0.1%
Slope:<7% (12% for 1.05µm filter)
DESCRIPTION PART NO. 1-5 pcs. >5 pcs. QTY IN STOCK QTY
+ IR Long Pass Filter, 1050.0nm 5% point, 12.5 mm dia. 1.05ILP-12.5 $99 $94 0
5% Wavelength 1050.0+40/-40 nm
Type LWP
Size 12.5 +0/-0.2mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $99
6+ $94
Estimated delivery: approximately 1 week.
Note: Always free ground shipping on all domestic orders.
+ IR Long Pass Filter, 1050.0nm 5% point, 25.0 mm dia. 1.05ILP-25 $215 $204 15
5% Wavelength 1050.0+40/-40 nm
Type LWP
Size 25.0 +0/-0.2mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $215
6+ $204
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
+ IR Long Pass Filter, 1050.0nm 5% point, 50.0 mm dia. 1.05ILP-50 $347 $330 13
5% Wavelength 1050.0+40/-40 nm
Type LWP
Size 50.0 +0/-0.2mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $347
6+ $330
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
+ IR Long Pass Filter, 1650.0nm 5% point, 12.5 mm dia. 1.65ILP-12.5 $103 $98 6
5% Wavelength 1650.0+70/-70 nm
Type LWP
Size 12.5 +0/-0.2mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $103
6+ $98
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
+ IR Long Pass Filter, 1650.0nm 5% point, 25.0 mm dia. 1.65ILP-25 $235 $223 51
5% Wavelength 1650.0+70/-70 nm
Type LWP
Size 25.0 +0/-0.2mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $235
6+ $223
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
+ IR Long Pass Filter, 1650.0nm 5% point, 50.0 mm dia. 1.65ILP-50 $365 $347 4
5% Wavelength 1650.0+70/-70 nm
Type LWP
Size 50.0 +0/-0.2mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $365
6+ $347
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
+ IR Long Pass Filter, 2400.0nm 5% point, 12.5 mm dia. 2.40ILP-12.5 $113 $107 11
5% Wavelength 2400.0+90/-90 nm
Type LWP
Size 12.5 +0/-0.2mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $113
6+ $107
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
+ IR Long Pass Filter, 2400.0nm 5% point, 25.0 mm dia. 2.40ILP-25 $265 $252 42
5% Wavelength 2400.0+90/-90 nm
Type LWP
Size 25.0 +0/-0.2mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $265
6+ $252
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
+ IR Long Pass Filter, 2400.0nm 5% point, 50.0 mm dia. 2.40ILP-50 $407 $387 7
5% Wavelength 2400.0+90/-90 nm
Type LWP
Size 50.0 +0/-0.2mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $407
6+ $387
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
+ IR Long Pass Filter, 3600.0nm 5% point, 12.5 mm dia. 3.60ILP-12.5 $122 $116 5
5% Wavelength 3600.0+140/-140 nm
Type LWP
Size 12.5 +0/-0.2mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $122
6+ $116
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
+ IR Long Pass Filter, 3600.0nm 5% point, 25.0 mm dia. 3.60ILP-25 $278 $264 13
5% Wavelength 3600.0+140/-140 nm
Type LWP
Size 25.0 +0/-0.2mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $278
6+ $264
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
+ IR Long Pass Filter, 3600.0nm 5% point, 50.0 mm dia. 3.60ILP-50 $443 $421 9
5% Wavelength 3600.0+140/-140 nm
Type LWP
Size 50.0 +0/-0.2mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $443
6+ $421
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
+ IR Long Pass Filter, 4500.0nm 5% point, 12.5 mm dia. 4.50ILP-12.5 $132 $125 45
5% Wavelength 4500.0+180/-180 nm
Type LWP
Size 12.5 +0/-0.2mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $132
6+ $125
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
+ IR Long Pass Filter, 4500.0nm 5% point, 25.0 mm dia. 4.50ILP-25 $311 $295 44
5% Wavelength 4500.0+180/-180 nm
Type LWP
Size 25.0 +0/-0.2mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $311
6+ $295
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
+ IR Long Pass Filter, 4500.0nm 5% point, 50.0 mm dia. 4.50ILP-50 $483 $459 13
5% Wavelength 4500.0+180/-180 nm
Type LWP
Size 50.0 +0/-0.2mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $483
6+ $459
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
+ IR Long Pass Filter, 6000.0nm 5% point, 12.5 mm dia. 6.00ILP-12.5 $133 $126 8
5% Wavelength 6000.0+240/-240 nm
Type LWP
Size 12.5 +0/-0.2mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $133
6+ $126
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
+ IR Long Pass Filter, 6000.0nm 5% point, 25.0 mm dia. 6.00ILP-25 $333 $316 12
5% Wavelength 6000.0+240/-240 nm
Type LWP
Size 25.0 +0/-0.2mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $333
6+ $316
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
+ IR Long Pass Filter, 6000.0nm 5% point, 50.0 mm dia. 6.00ILP-50 $489 $465 7
5% Wavelength 6000.0+240/-240 nm
Type LWP
Size 50.0 +0/-0.2mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $489
6+ $465
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
+ IR Long Pass Filter, 7300.0nm 5% point, 12.5 mm dia. 7.30ILP-12.5 $135 $128 44
5% Wavelength 7300.0+290/-290 nm
Type LWP
Size 12.5 +0/-0.2mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $135
6+ $128
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
+ IR Long Pass Filter, 7300.0nm 5% point, 25.0 mm dia. 7.30ILP-25 $365 $347 21
5% Wavelength 7300.0+290/-290 nm
Type LWP
Size 25.0 +0/-0.2mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $365
6+ $347
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
+ IR Long Pass Filter, 7300.0nm 5% point, 50.0 mm dia. 7.30ILP-50 $497 $472 13
5% Wavelength 7300.0+290/-290 nm
Type LWP
Size 50.0 +0/-0.2mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $497
6+ $472
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.