Surplus - IR Bandpass Filters
Surplus - IR Bandpass Filters
Surplus IR Bandpass Filters from Andover Corporation offer exceptional value on premium infrared optical filters at reduced prices. These specialized filters isolate specific regions of the infrared spectrum while providing high transmission of desired energy and deep rejection of unwanted radiation.
Constructed with hard, durable first-surface dielectric coatings on optical-quality IR-transmitting substrates, these surplus filters maintain the same exacting standards as our regular product line. Available in a range of center wavelengths and bandwidths, they're ideal for researchers, educational institutions, and companies seeking cost-effective solutions for environmental monitoring, security systems, thermal imaging, and specialized infrared applications. Despite being offered at discounted prices, these filters deliver excellent optical performance and durability, capable of withstanding normal cleaning and handling required of high-quality optical components. Inventory changes regularly based on availability, so we recommend checking our listings frequently for the best selection.
Showing 145–160 of 167 results
- Wavelength: 9050 ±30
- Emission Line: N/A
- Operating Temperature: 23.0
- Parallelism: Commercial
- Bandwidth (FWHM): 330 ±30 nm
- Minimum Transmission: 65%
- Blocking: 1x10-3 avg. 7,400 - 14,500nm
- Size: 50.0 Ø +0.0 / -0.1
- Thickness: 1.0 ±0.2
- Scratch-Dig: 80/50
- Clear Aperture: 45mm Ø min
- Flatness: Commercial
- Effective Refractive Index: N/A
- Substrate: Germanium
- Gas: N/A
- Wavelength: 9050 ±100
- Emission Line: N/A
- Operating Temperature: 23.0
- Parallelism: Commercial
- Bandwidth (FWHM): 1300 ±100 nm
- Minimum Transmission: 85%
- Blocking: < 0.1% (avg) UV to 14000nm
- Size: 0.984 Ø ±0.010
- Thickness: 0.039 ±0.010
- Scratch-Dig: 80/50
- Clear Aperture: 22mmØ
- Flatness: 3 -5 per inch
- Effective Refractive Index: N/A
- Substrate: Germanium
- Gas: N/A
- Wavelength: 9050 ±75
- Emission Line: N/A
- Operating Temperature: 23.0
- Parallelism: 3 arc minutes or better
- Bandwidth (FWHM): 1500 ±75 nm
- Minimum Transmission: 90%
- Blocking: < 0.1% (avg) UV to 14500nm
- Size: 0.984 Ø ±0.010
- Thickness: 0.039 ±0.010
- Scratch-Dig: 80/50
- Clear Aperture: 22mmØ
- Flatness: 1 per inch or better
- Effective Refractive Index: N/A
- Substrate: Germanium
- Gas: N/A
- Wavelength: 9075 ±50
- Emission Line: N/A
- Operating Temperature: 23.0
- Parallelism: Commercial
- Bandwidth (FWHM): 1300 ±75 nm
- Minimum Transmission: 85%
- Blocking: 1x10-3 avg. X-Ray to 14500nm
- Size: 50.0 Ø +0.0 / -0.1
- Thickness: 1.0 ±0.2
- Scratch-Dig: 80/50
- Clear Aperture: 47mm Ø min
- Flatness: Commercial
- Effective Refractive Index: N/A
- Substrate: Germanium
- Gas: N/A
- Wavelength: 9135 ±50
- Emission Line: N/A
- Operating Temperature: 23.0
- Parallelism: Commercial
- Bandwidth (FWHM): 450 ±50 nm
- Minimum Transmission: 85%
- Blocking: >1 x 10-3 avg. 7400nm to 13800nm
- Size: 50.0 Ø ±0.2
- Thickness: 1.0 ±0.2
- Scratch-Dig: 80/50
- Clear Aperture: 47mm Ø min
- Flatness: Commercial
- Effective Refractive Index: N/A
- Substrate: Germanium
- Gas: N/A
- Wavelength: 9220 ±50
- Emission Line: N/A
- Operating Temperature: 23.0
- Parallelism: < 10 arc minutes
- Bandwidth (FWHM): 2100 ±100 nm
- Minimum Transmission: 90 %
- Blocking: 1x10-3 avg 2800nm to 15000 nm
- Size: 50.0 Ø +0.0 / -0.2
- Thickness: 1.0 ±0.2
- Scratch-Dig: 80/50
- Clear Aperture: 45mm Ø min
- Flatness: 5 or better at of Interest
- Effective Refractive Index: N/A
- Substrate: Ge
- Gas: CO2 Laser
- Wavelength: 9250 ±50
- Emission Line: N/A
- Operating Temperature: 23.0
- Parallelism: Commercial
- Bandwidth (FWHM): 1000 ±75 nm
- Minimum Transmission: 90%
- Blocking: T(AVG) < 0.1 % UV to 14.5µm
- Size: 50.0 Ø +0.0 / -0.1
- Thickness: 1.0 ±0.2
- Scratch-Dig: 80/50
- Clear Aperture: 47mm
- Flatness: Commercial
- Effective Refractive Index: N/A
- Substrate: Ge
- Gas: N/A
- Wavelength: 9300 ±200
- Emission Line: N/A
- Operating Temperature: 23.0
- Parallelism: Commercial
- Bandwidth (FWHM): 1000 ±200 nm
- Minimum Transmission: 70%
- Blocking: 1x10-3 (avg) 7.5 - 13.0 micron
- Size: 25.0 Ø ±0.2
- Thickness: 2.0 ±0.5
- Scratch-Dig: 60/40
- Clear Aperture: 22.0
- Flatness: Commercial
- Effective Refractive Index: N/A
- Substrate: Ge
- Gas: N/A
- Wavelength: 9300 ±150
- Emission Line: N/A
- Operating Temperature: 23
- Parallelism: Commercial
- Bandwidth (FWHM): 3500 ±200 nm
- Minimum Transmission: 85%
- Blocking: <0.1% avg 5100nm to 16000nm
- Size: 25.0 ±0.1
- Thickness: 1.0 ±0.2
- Scratch-Dig: 80/50
- Clear Aperture: 22mm Ø min
- Flatness: 3 - 5 per inch
- Effective Refractive Index: N/A
- Substrate: Germanium
- Gas: N/A
- Wavelength: 9350 ±125
- Emission Line: N/A
- Operating Temperature: 23.0
- Parallelism: Commercial
- Bandwidth (FWHM): 3300 ±150 nm
- Minimum Transmission: 88%
- Blocking: 1x10-3 avg. X-Ray to 16000nm
- Size: 25.0 Ø +0.0 / -0.2
- Thickness: 1.0 ±0.2
- Scratch-Dig: 100/60
- Clear Aperture: 21mm Ø min
- Flatness: < 5 per inch or better
- Effective Refractive Index: N/A
- Substrate: Ge
- Gas: N/A
- Wavelength: 9500 ±60
- Emission Line: N/A
- Operating Temperature: 23.0
- Parallelism: < 10 arc minutes
- Bandwidth (FWHM): 500 ±50 nm
- Minimum Transmission: 85%
- Blocking: 1 x 10-3 avg. 7500nm to 13500nm 1 x 10-2 avg. 13500nm to 14500nm
- Size: 25.0 Ø ±0.2
- Thickness: 1.0 ±0.2
- Scratch-Dig: 80/50
- Clear Aperture: 22mm Ø min
- Flatness: < 10 waves
- Effective Refractive Index: N/A
- Substrate: Germanium
- Gas: N/A
- Wavelength: 9500 ±150
- Emission Line: N/A
- Operating Temperature: 23.0
- Parallelism: Commercial
- Bandwidth (FWHM): 2300 ±200 nm
- Minimum Transmission: > 80 % Ave
- Blocking: < 0.1 % UV to 22 microns
- Size: 25.0 ±0.1
- Thickness: 1.0 ±0.1
- Scratch-Dig: 80/50
- Clear Aperture: 22.0
- Flatness: Commercial
- Effective Refractive Index: N/A
- Substrate: Ge
- Gas: N/A
- Wavelength: 9500 ±100
- Emission Line: N/A
- Operating Temperature: 23.0
- Parallelism: < 10 arc minutes
- Bandwidth (FWHM): 2700 ±50 nm
- Minimum Transmission: > 80 % Ave
- Blocking: < 0.1 % (avg) UV to 15 microns
- Size: 50.0 Ø +0.0 / -0.2
- Thickness: 1.0 ±0.4
- Scratch-Dig: 80/50
- Clear Aperture: 45mm Ø min
- Flatness: 5 or better at of Interest
- Effective Refractive Index: N/A
- Substrate: Ge
- Gas: N/A
- Wavelength: 9510 ±100
- Emission Line: N/A
- Operating Temperature: 23.0
- Parallelism: Commercial
- Bandwidth (FWHM): 440 ±50 nm
- Minimum Transmission: 88 %
- Blocking: 1x10-3 avg. 7,500 to 15,000nm
- Size: 50.0 Ø +0.0 / -0.2
- Thickness: 1.0 ±0.2
- Scratch-Dig: 80/50
- Clear Aperture: 45mm Ø min
- Flatness: Commercial
- Effective Refractive Index: N/A
- Substrate: Ge
- Gas: N/A
- Wavelength: 9560 ±15
- Emission Line: N/A
- Operating Temperature: 23
- Parallelism: Commercial
- Bandwidth (FWHM): 170 ±10 nm
- Minimum Transmission: 84
- Blocking: <0.1% avg UV to 12000nm
- Size: 25.0 ±0.1
- Thickness: 1.0 ±0.2
- Scratch-Dig: 80/50
- Clear Aperture: 22mm Ø min
- Flatness: Commercial
- Effective Refractive Index: N/A
- Substrate: N/A
- Gas: N/A
- Wavelength: 9625 ±100
- Emission Line: N/A
- Operating Temperature: 23.0
- Parallelism: Commercial
- Bandwidth (FWHM): 2650 ±150 nm
- Minimum Transmission: 90
- Blocking: < 0.1% UV to 16400nm
- Size: 25.0 +0.0 / -0.1
- Thickness: 1.0 ±0.1
- Scratch-Dig: 80/50
- Clear Aperture: 22mm Ø min
- Flatness: 3 -5 per inch
- Effective Refractive Index: N/A
- Substrate: Germanium
- Gas: N/A