IR Bandpass Filters
Infrared (IR) bandpass filters come in two types, narrow bandpass (up to 250nm bandwidth) and wide bandpass (more than 500nm bandwidth). The IR bandpass filters are used in applications like digital imaging, IR gas analysis, security systems, and high-temperature detection.
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Products
Specifications
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| Part Number | Dimension (mm) | Center λ (nm) | FWHM (nm) | T (%) | Cut-off region (nm) |
|---|---|---|---|---|---|
| BFIR-900-70 | Ø25 x 3.5 | 900 | 70 | ≥90 | 650-1250 |
| BFIR-1.38-70 | Ø25 x 3.5 | 1380 | 70 | ≥85 | 500-2000 |
| BFIR-1.64-190 | Ø25.4 x 1 | 1640 | 190 | ≥ 80 | 400-8000 |
| BFIR-1.79-45 | Ø25 x 2 | 1790 | 45 | ≥80 | 400-3000 |
| BFIR-1.81-50 | Ø25 x 2 | 1810 | 50 | ≥80 | 400-3000 |
| BFIR-1.97-45 | Ø25 x 2 | 1970 | 45 | ≥80 | 400-3000 |
| BFIR-2-50 | Ø12 x 1 | 2000 | 50 | ≥50 | 400-15000 |
| BFIR-2.1-50 | Ø16 x 1 | 2100 | 50 | ≥90 | 400-3000 |
| BFIR-2.25-30 | Ø25.4 x 1 | 2250 | 30 | ≥85 | 400-3000 |
| BFIR-2.29-30 | Ø25.4 x 1 | 2290 | 30 | ≥85 | 400-3000 |
| BFIR-2.4-70 | Ø25 x 3.5 | 2400 | 70 | ≥75 | 500-3000 |
| BFIR-2.45-74 | Ø25 x 0.5 | 2450 | 74 | ≥70 | 1500-5500 |
| BFIR-2.47-74 | Ø25 x 0.5 | 2470 | 74 | ≥70 | 1550-5500 |
| BFIR-2.5-70 | Ø25.4 x 1 | 2500 | 70 | ≥80 | 500-3000 |
| BFIR-2.7-210 | Ø25.4 x 1 | 2700 | 210 | ≥80 | 400-6000 |
| BFIR-2.7-100 | Ø25.4 x 1 | 2700 | 100 | ≥80 | 1500-6500 |
| BFIR-2.73-210 | Ø25.4 x 1 | 2730 | 210 | ≥80 | 400-6000 |
| BFIR-2.85-86 | Ø25 x 0.5 | 2850 | 86 | ≥80 | 1500-5500 |
| BFIR-3.03-100 | Ø25.4 x 1 | 3030 | 100 | ≥80 | 300-30000 |
| BFIR-3.05-100 | Ø25.4 x 1 | 3050 | 100 | ≥80 | 300-20000 |
| BFIR-3.085-100 | Ø25.4 x 1 | 3085 | 100 | ≥80 | 300-30000 |
| BFIR-3.12-100 | Ø25.4 x 1 | 3120 | 100 | ≥80 | 300-30000 |
| BFIR-3.2-60 | Ø25.4 x 1 | 3200 | 60 | ≥80 | 300-20000 |
| BFIR-3.23-60 | Ø25.4 x 1 | 3230 | 60 | ≥80 | 300-20000 |
| BFIR-3.32-180 | Ø25 x 0.5 | 3320 | 180 | ≥80 | 400-10000 |
| BFIR-3.32-190 | Ø25 x 0.5 | 3320 | 190 | ≥80 | 800-6000 |
| BFIR-3.35-180 | Ø25 x 0.5 | 3350 | 180 | ≥80 | 800-6000 |
| BFIR-3.37-400 | Ø25 x 0.5 | 3370 | 400 | ≥80 | 1000-6000 |
| BFIR-3.375-190 | Ø25 x 0.5 | 3375 | 190 | ≥80 | 400-11000 |
| BFIR-3.4-140 | Ø25 x 0.5 | 3400 | 140 | ≥80 | 400-11000 |
| BFIR-3.4-60 | Ø25.4 x 1 | 3400 | 60 | ≥80 | 400-20000 |
| BFIR-3.4-200 | Ø25.4 x 1 | 3400 | 200 | ≥80 | 400-20000 |
| BFIR-3.41-190 | Ø25 x 0.5 | 3410 | 190 | ≥80 | 400-11000 |
| BFIR-3.5-190 | Ø25 x 0.5 | 3500 | 190 | ≥80 | 400-11000 |
| BFIR-3.55-145 | Ø25.4 x 1 | 3550 | 145 | ≥75 | 400-15000 |
| BFIR-3.65-160 | Ø25.4x 1 | 3650 | 160 | ≥80 | 400-20000 |
| BFIR-3.7-200 | Ø25 x 0.5 | 3700 | 200 | ≥80 | 400-8000 |
| BFIR-3.75-200 | Ø25 x 0.5 | 3750 | 200 | ≥80 | 400-8000 |
| BFIR-3.8-400 | Ø25 x 0.5 | 3800 | 400 | ≥80 | 400-7000 |
| BFIR-3.8-200 | Ø25 x 0.5 | 3800 | 200 | ≥80 | 400-15000 |
| BFIR-3.8-190 | Ø25 x 0.5 | 3800 | 190 | ≥80 | 400-20000 |
| BFIR-3.84-180 | Ø25 x 0.5 | 3840 | 180 | ≥85 | 400-11000 |
| BFIR-3.85-200 | Ø25.4 x 1 | 3850 | 200 | ≥80 | 300-20000 |
| BFIR-3.9-90 | Ø25 x 0.5 | 3900 | 90 | ≥80 | 400-11000 |
| BFIR-3.9-180 | Ø25 x 0.5 | 3900 | 180 | ≥80 | 400-11000 |
| BFIR-3.9-200 | Ø25 x 0.5 | 3900 | 200 | ≥85 | 400-8000 |
| BFIR-3.95-200 | Ø25 x 0.5 | 3950 | 200 | ≥85 | 400-8000 |
| BFIR-4.1-200 | Ø25 x 0.5 | 4100 | 200 | ≥80 | 400-8000 |
| BFIR-4.15-600 | Ø25 x 0.5 | 4150 | 600 | ≥80 | 400-11000 |
| BFIR-4.19-160 | Ø25 x 0.5 | 4190 | 160 | ≥70 | 1000-9000 |
| BFIR-4.2-380 | Ø25 x 0.5 | 4200 | 380 | ≥80 | 400-11000 |
| BFIR-4.25-50 | Ø25 x 0.5 | 4250 | 50 | ≥70 | 400-11000 |
| BFIR-4.26-90 | Ø25 x 0.5 | 4260 | 90 | ≥80 | 400-20000 |
| BFIR-4.26-150 | Ø25 x 0.5 | 4260 | 150 | ≥80 | 400-11000 |
| BFIR-4.26-160 | Ø25 x 0.5 | 4260 | 160 | ≥80 | 400-11000 |
| BFIR-4.26-600 | Ø25 x 0.5 | 4260 | 600 | ≥80 | 400-11000 |
| BFIR-4.27-600 | Ø25 x 0.5 | 4270 | 600 | ≥85 | 400-11000 |
| BFIR-4.29-270 | Ø25 x 0.5 | 4290 | 270 | ≥80 | 1000-8000 |
| BFIR-4.29-530 | Ø25 x 0.5 | 4290 | 530 | ≥85 | 400-11000 |
| BFIR-4.3-120 | Ø25.4 x 0.5 | 4300 | 120 | ≥85 | 400-20000 |
| BFIR-4.3-160 | Ø25 x 0.5 | 4300 | 160 | ≥80 | 1000-9000 |
| BFIR-4.3-220 | Ø25 x 0.5 | 4300 | 220 | ≥80 | 400-11000 |
| BFIR-4.3-250 | Ø25 x 0.5 | 4300 | 250 | ≥70 | 400-11000 |
| BFIR-4.3-410 | Ø25 x 0.5 | 4300 | 410 | ≥80 | 2000-13000 |
| BFIR-4.3-420 | Ø25 x 0.5 | 4300 | 420 | ≥80 | 400-7000 |
| BFIR-4.32-600 | Ø25 x 0.5 | 4320 | 600 | ≥80 | 400-11000 |
| BFIR-4.4-30 | Ø25 x 0.5 | 4400 | 30 | ≥70 | 400-11000 |
| BFIR-4.4-420 | Ø25 x 0.5 | 4400 | 420 | ≥80 | 400-11000 |
| BFIR-4.5-130 | Ø25 x 0.5 | 4500 | 130 | ≥80 | 400-11000 |
| BFIR-4.5-200 | Ø25 x 0.5 | 4500 | 200 | ≥80 | 400-8000 |
| BFIR-4.6-180 | Ø25 x 0.5 | 4600 | 180 | ≥70 | 400-11000 |
| BFIR-4.7-140 | Ø25 x 0.5 | 4700 | 140 | ≥75 | 400-10000 |
| BFIR-4.7-200 | Ø25 x 0.5 | 4700 | 200 | ≥80 | 1500-5500 |
| BFIR-4.7-80 | Ø25.4 x 1 | 4700 | 80 | ≥80 | 400-15000 |
| BFIR-4.8-230 | Ø18 x 0.3 | 4800 | 230 | ≥85 | 400-6500 |
| BFIR-4.8-180 | Ø20 x 1 | 4800 | 180 | ≥85 | 400-11000 |
| BFIR-4.9-230 | Ø18 x 0.3 | 4900 | 230 | ≥85 | 400-6500 |
| BFIR-5.02-240 | Ø25 x 0.5 | 5020 | 240 | ≥80 | 400-7000 |
| BFIR-5.1-100 | Ø25 x 1 | 5100 | 100 | ≥70 | 400-20000 |
| BFIR-5.2-610 | Ø25 x 0.5 | 5200 | 610 | ≥80 | 400-11000 |
| BFIR-5.2-90 | Ø25 x 0.5 | 5200 | 90 | ≥80 | 400-11000 |
| BFIR-5.3-610 | Ø25 x 0.5 | 5300 | 610 | ≥80 | 400-10600 |
| BFIR-5.4-610 | Ø25 x 0.5 | 5400 | 610 | ≥80 | 400-10600 |
| BFIR-5.75-160 | Ø25 x 0.5 | 5750 | 160 | ≥75 | 1000-10000 |
| BFIR-6.2-125 | Ø25.4 x 1 | 6200 | 125 | ≥70 | 400-15000 |
| BFIR-6.3-110 | Ø18 x 0.9 | 6300 | 110 | ≥70 | 400-11000 |
| BFIR-6.43-170 | Ø25 x 0.5 | 6430 | 170 | ≥80 | 400-11000 |
| BFIR-6.557-190 | Ø25 x 0.5 | 6557 | 190 | ≥80 | 1000-8000 |
| BFIR-6.68-170 | Ø25 x 0.5 | 6680 | 170 | ≥80 | 400-8000 |
| BFIR-6.74-90 | Ø20 x 1 | 6740 | 90 | ≥70 | 400-10600 |
| BFIR-7.1-360 | Ø25 x 0.5 | 7100 | 360 | ≥70 | 400-10600 |
| BFIR-7.2-310 | Ø20 x 1 | 7200 | 310 | ≥80 | 1000-10600 |
| BFIR-7.3-120 | Ø12 x 1 | 7300 | 120 | ≥80 | 400-11000 |
| BFIR-7.4-360 | Ø25 x 0.5 | 7400 | 360 | ≥80 | 400-10600 |
| BFIR-7.5-2500 | Ø18 x 0.6 | 7500 | 2500 | ≥90 | 400-17100 |
| BFIR-7.62-180 | Ø25 x 0.5 | 7620 | 180 | ≥80 | 400-10600 |
| BFIR-7.7-450 | Ø25.4 x 1 | 7700 | 450 | ≥80 | 200-16000 |
| BFIR-7.8-450 | Ø25.4 x 1 | 7800 | 450 | ≥80 | 200-16000 |
| BFIR-7.9-450 | Ø25 x 1 | 7900 | 450 | ≥90 | 400-14000 |
| BFIR-8-450 | Ø25 x 1 | 8000 | 450 | ≥90 | 400-14000 |
| BFIR-8.1-250 | Ø100 x 0.5 | 8100 | 250 | >65 | 400-11000 |
| BFIR-8.25-250 | Ø100 x 0.5 | 8250 | 250 | >90 | 400-11000 |
| BFIR-8.5-50 | Ø12 x 0.5 | 8500 | 50 | >70 | 400-13600 |
| BFIR-9.5-55 | Ø12 x 0.5 | 9500 | 55 | >70 | 400-13600 |
| BFIR-9.6-55 | Ø18 x 0.8 | 9600 | 55 | >70 | 400-13600 |
| BFIR-9.7-55 | Ø12 x 0.5 | 9700 | 55 | >70 | 400-13600 |
| BFIR-9.9-640 | Ø25 x 1 | 9900 | 640 | ≥85 | 400-14000 |
| BFIR-10.1-660 | Ø25 x 1 | 10100 | 660 | ≥85 | 400-14000 |
| BFIR-10.2-190 | Ø15 x 1 | 10200 | 190 | ≥70 | 400-13600 |
| BFIR-10.4-660 | Ø25 x 1 | 10400 | 660 | ≥85 | 400-14000 |
| BFIR-10.5-700 | Ø25.4 x 0.5 | 10500 | 700 | ≥85 | 400-18000 |
| BFIR-10.6-120 | Ø25 x 0.5 | 10600 | 120 | ≥60 | 400-13600 |
| BFIR-10.8-190 | Ø25.4 x 0.5 | 10800 | 190 | ≥85 | 400-14000 |
| BFIR-11.5-550 | Ø50 x 0.5 | 11500 | 550 | ≥65 | 400-18000 |
| BFIR-12.6-800 | Ø25 x 1 | 12600 | 800 | ≥85 | 400-15000 |
| BFIR-12.9-800 | Ø25 x 1 | 12900 | 800 | ≥85 | 400-15000 |
| BFIR-13-4000 | Ø18 x 0.9 | 13000 | 4000 | ≥85 | 1200-20000 |
| BFIR-13.1-800 | Ø25 x 1 | 13100 | 800 | ≥85 | 400-15000 |
| BFIR-15-2200 | Ø21 x 2.2 | 15000 | 2200 | ≥65 | 2000-25000 |
| BFIR-16-2400 | Ø12.5 x 1 | 16000 | 2400 | ≥70 | 2000-25000 |
| BFIR-16.2-2400 | Ø12.5 x 1 | 16200 | 2400 | ≥70 | 2000-25000 |
Dimensional Tolerance: +0/-0.2mm
Clear Aperture: >90%
Thickness: <1mm
CWL Tolerance: ±2nm
FWHM Tolerance: ±2%
Average Transmission: >90%
Peak Transmission: >93%
Block: <1%@200nm-11µm
FAQ
What is a bandpass filter?
A bandpass filter transmits a certain range of wavelengths and restricts unwanted wavelengths. These are angle-sensitive filters, so be careful while integrating them into a system. The transmission percentage of a filter can be improved by correctly coating the surface.