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 $94 $89 4
5% Wavelength 1050.0+40/-40 nm
Type LWP
Size 12.5 +0/-0.1mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $94
6+ $89
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
+ IR Long Pass Filter, 1050.0nm 5% point, 25.0 mm dia. 1.05ILP-25 $205 $195 21
5% Wavelength 1050.0+40/-40 nm
Type LWP
Size 25.0 +0/-0.1mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $205
6+ $195
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 $330 $314 12
5% Wavelength 1050.0+40/-40 nm
Type LWP
Size 50.0 +0/-0.1mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $330
6+ $314
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 $98 $93 7
5% Wavelength 1650.0+70/-70 nm
Type LWP
Size 12.5 +0/-0.1mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $98
6+ $93
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 $224 $213 13
5% Wavelength 1650.0+70/-70 nm
Type LWP
Size 25.0 +0/-0.1mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $224
6+ $213
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 $348 $331 0
5% Wavelength 1650.0+70/-70 nm
Type LWP
Size 50.0 +0/-0.1mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $348
6+ $331
Estimated delivery: approximately 1 week.
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 $108 $103 8
5% Wavelength 2400.0+90/-90 nm
Type LWP
Size 12.5 +0/-0.1mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $108
6+ $103
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 $252 $239 18
5% Wavelength 2400.0+90/-90 nm
Type LWP
Size 25.0 +0/-0.1mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $252
6+ $239
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 $388 $369 8
5% Wavelength 2400.0+90/-90 nm
Type LWP
Size 50.0 +0/-0.1mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $388
6+ $369
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 $116 $110 9
5% Wavelength 3600.0+140/-140 nm
Type LWP
Size 12.5 +0/-0.1mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $116
6+ $110
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 $265 $252 33
5% Wavelength 3600.0+140/-140 nm
Type LWP
Size 25.0 +0/-0.1mm
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, 3600.0nm 5% point, 50.0 mm dia. 3.60ILP-50 $422 $401 15
5% Wavelength 3600.0+140/-140 nm
Type LWP
Size 50.0 +0/-0.1mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $422
6+ $401
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 $126 $120 0
5% Wavelength 4500.0+180/-180 nm
Type LWP
Size 12.5 +0/-0.1mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $126
6+ $120
Estimated delivery: approximately 1 week.
Note: Always free ground shipping on all domestic orders.
+ IR Long Pass Filter, 4500.0nm 5% point, 25.0 mm dia. 4.50ILP-25 $296 $281 22
5% Wavelength 4500.0+180/-180 nm
Type LWP
Size 25.0 +0/-0.1mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $296
6+ $281
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 $460 $437 6
5% Wavelength 4500.0+180/-180 nm
Type LWP
Size 50.0 +0/-0.1mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $460
6+ $437
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 $127 $121 10
5% Wavelength 6000.0+240/-240 nm
Type LWP
Size 12.5 +0/-0.1mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $127
6+ $121
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 $317 $301 36
5% Wavelength 6000.0+240/-240 nm
Type LWP
Size 25.0 +0/-0.1mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $317
6+ $301
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 $466 $443 9
5% Wavelength 6000.0+240/-240 nm
Type LWP
Size 50.0 +0/-0.1mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $466
6+ $443
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 $129 $123 49
5% Wavelength 7300.0+290/-290 nm
Type LWP
Size 12.5 +0/-0.1mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $129
6+ $123
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 $348 $331 23
5% Wavelength 7300.0+290/-290 nm
Type LWP
Size 25.0 +0/-0.1mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $348
6+ $331
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 $473 $449 7
5% Wavelength 7300.0+290/-290 nm
Type LWP
Size 50.0 +0/-0.1mm
Thickness 1.0 +0.2/-0.2 mm
QtyPrice
1-5 $473
6+ $449
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.