Surplus - Hard-Coated Bandpass Filters

Surplus - Hard-Coated Bandpass Filters
Surplus Hard-Coated Bandpass Filters from Andover Corporation offer exceptional value on premium optical filters at reduced prices. These specialized filters feature plasma-deposited, hard-oxide coatings on borosilicate glass substrates, making them remarkably durable and suitable for high-temperature applications.
Unlike conventional soft-coated filters, these hard-coated variants contain no absorbing filter glasses, allowing them to withstand demanding environmental conditions while maintaining optical performance. Each surplus filter provides a steep transition from high peak transmission to deep OD4 blocking, effectively isolating specific wavelength bands while rejecting unwanted radiation. Available across various wavelengths including major laser lines and atomic absorption bands, these surplus items represent significant savings without compromising on quality. Ideal for machine vision, biotech instrumentation, medical devices, and other precision optical applications, these filters deliver professional performance at a fraction of the standard cost. Inventory changes regularly, so we recommend checking our listings frequently for the best selection.
Showing 1–16 of 52 results
- Center Wavelength: 365 + 2.0/ - 2.0
- Parallelism: Commercial
- Bandwidth: 10.0 +2.0/-2.0 nm
- Transmission: 90%
- Blocking: 1x10-4 avg. 200-1200nm
- Size: 6.0 Ø
- Thickness: 3.1
- Scratch-Dig: 80/50
- Clear Aperture: 4.0
- Flatness: Commercial
- Center Wavelength: 420 + 2.0/ - 2.0
- Parallelism: Commercial
- Bandwidth: 10.0 +2.0/-2.0 nm
- Transmission: 90%
- Blocking: 1x10-4 avg. 200-1200nm
- Size: 6.0 Ø
- Thickness: 3.1
- Scratch-Dig: 80/50
- Clear Aperture: 4.0
- Flatness: Commercial
- Center Wavelength: 440 + 2.0/ - 2.0
- Parallelism: 30 arc seconds or better
- Bandwidth: 10.0 +2.0/-2.0 nm
- Transmission: 90%
- Blocking: 1x10-4 from 200 - 1200nm
- Size: 30.0 Ø
- Thickness: 3.3
- Scratch-Dig: 80/50
- Clear Aperture: 26mm Ø min
- Flatness: Commercial
- Center Wavelength: 469 + 3.0/ - 3.0
- Parallelism: 30 arc seconds or better
- Bandwidth: 35 +3.0/-3.0 nm
- Transmission: 90%
- Blocking: 1x10-5 avg. UV to 1000nm
- Size: 24.0
- Thickness: 2.0
- Scratch-Dig: 60/40
- Clear Aperture: 22.0
- Flatness: 0.25 per inch or better
- Center Wavelength: 492 + 2.0/ - 2.0
- Parallelism: Commercial
- Bandwidth: 10.0 +2.0/-2.0 nm
- Transmission: 90%
- Blocking: 1x10-4 avg. 200-1200nm
- Size: 6.0 Ø
- Thickness: 3.1
- Scratch-Dig: 80/50
- Clear Aperture: 4.0
- Flatness: Commercial
- Center Wavelength: 520 + 2/ - 2
- Parallelism: Commercial
- Bandwidth: 10.0 +2/-2 nm
- Transmission: 90%
- Blocking: 1x10-4 avg. 200-1200nm
- Size: 5.0 Ø
- Thickness: 3.3
- Scratch-Dig: 80/50
- Clear Aperture: 4.5mm Ø min
- Flatness: Commercial
- Center Wavelength: 520 + 2/ - 2
- Parallelism: Commercial
- Bandwidth: 10.0 +2/-2 nm
- Transmission: 90%
- Blocking: 1x10-4 avg. 200-1200nm
- Size: 8.3 Ø
- Thickness: 3.1
- Scratch-Dig: 80/50
- Clear Aperture: 6mm Ø min
- Flatness: Commercial
- Center Wavelength: 1064 + 2/ - 2
- Parallelism: Commercial
- Bandwidth: 10.0 +2/-2 nm
- Transmission: 90%
- Blocking: 1x10-4 avg. 200-1400nm
- Size: 9.0 Ø
- Thickness: 4.0
- Scratch-Dig: 80/50
- Clear Aperture: 21mm Ø min
- Flatness: Commercial
- Center Wavelength: 1200 + 30.0/ - 30.0
- Parallelism: Commercial
- Bandwidth: 200 +25.0/-25.0 nm
- Transmission: 90
- Blocking: T Avg. ≤ 0.1% from 200 to 1800nm
- Size: 12.7 Ø
- Thickness: 2.0
- Scratch-Dig: 60/40
- Clear Aperture: 11.4 mm
- Flatness: λ/4 per inch or better
- Center Wavelength: 1200 + 30.0/ - 30.0
- Parallelism: Commercial
- Bandwidth: 200 +25.0/-25.0 nm
- Transmission: 90%
- Blocking: T(avg) ≤ 0.1% from 200 to 1800nm
- Size: 25.0 Ø
- Thickness: 2.0
- Scratch-Dig: 60/40
- Clear Aperture: 21mm Ø min
- Flatness: 0.25 per inch or better
- Center Wavelength: 1200 + 10/ - 10
- Parallelism: 120 arc seconds or better
- Bandwidth: 815.0 +10/-10 nm
- Transmission: 93%
- Blocking: 1x10-4 avg. X-Ray to 2000
- Size: 50.0 Ø
- Thickness: 2.0
- Scratch-Dig: 60/40
- Clear Aperture: 45mm Ø min
- Flatness: 3.0 pwr, 0.5 irreg per inch
- Center Wavelength: 1550 + 3.0/ - 3.0
- Parallelism: Commercial
- Bandwidth: 25.0 +5.0/-5.0 nm
- Transmission: 90%
- Blocking: 1x10-4 avg. 200-1800nm
- Size: 7.8
- Thickness: 3.3
- Scratch-Dig: 80/50
- Clear Aperture: 90% of CA
- Flatness: Commercial
- Center Wavelength: 1550 + 40.0/ - 40.0
- Parallelism: Commercial
- Bandwidth: 300 +30.0/-30.0 nm
- Transmission: 90
- Blocking: T Avg. ≤ 0.1% from 200 to 2100nm
- Size: 12.70
- Thickness: 2.0
- Scratch-Dig: 60/40
- Clear Aperture: 11.4 mm
- Flatness: λ/4 per inch or better
- Center Wavelength: 1550 + 40.0/ - 40.0
- Parallelism: Commercial
- Bandwidth: 300 +30.0/-30.0 nm
- Transmission: 90
- Blocking: T Avg. ≤ 0.1% from 200 to 2100nm
- Size: 25.0 Ø
- Thickness: 2.0
- Scratch-Dig: 60/40
- Clear Aperture: 11.4 mm
- Flatness: λ/4 per inch or better
- Center Wavelength: 1550 + 40.0/ - 40.0
- Parallelism: Commercial
- Bandwidth: 300 +30.0/-30.0 nm
- Transmission: 90
- Blocking: T Avg. ≤ 0.1% from 200 to 2100nm
- Size: 12.70
- Thickness: 2.0
- Scratch-Dig: 60/40
- Clear Aperture: 11.4 mm
- Flatness: λ/4 per inch or better
- Center Wavelength: 1550 + 40.0/ - 40.0
- Parallelism: Commercial
- Bandwidth: 300 +30.0/-30.0 nm
- Transmission: 90
- Blocking: T Avg. ≤ 0.1% from 200 to 2100nm
- Size: 25.0 Ø
- Thickness: 2.0
- Scratch-Dig: 60/40
- Clear Aperture: 21mm Ø min
- Flatness: Commercial