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 $104 $78 6
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 $104
6+ $78
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 $226 $170 45
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 $226
6+ $170
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 $364 $273 11
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 $364
6+ $273
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 $108 $81 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 $108
6+ $81
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 $247 $185 52
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 $247
6+ $185
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 $383 $287 11
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 $383
6+ $287
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 $119 $89 22
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 $119
6+ $89
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 $278 $209 34
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 $278
6+ $209
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 $427 $320 13
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 $427
6+ $320
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 $128 $96 17
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 $128
6+ $96
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 $292 $219 53
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 $292
6+ $219
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 $465 $349 4
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 $465
6+ $349
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 $139 $104 75
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 $139
6+ $104
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 $327 $245 19
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 $327
6+ $245
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 $507 $380 7
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 $507
6+ $380
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 $140 $105 4
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 $140
6+ $105
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 $350 $263 15
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 $350
6+ $263
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 $513 $385 12
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 $513
6+ $385
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 $142 $107 59
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 $142
6+ $107
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 $383 $287 40
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 $383
6+ $287
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 $522 $392 10
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 $522
6+ $392
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.