NIR, SWIR, MWIR, and LWIR are different design spaces
IR filters should be matched to detector material, substrate transmission, and working temperature. Do not treat all IR bands as interchangeable.
IR Optical Filters for NIR and SWIR Applications
Review infrared filters for NIR, SWIR, MWIR, and LWIR systems. Compare wavelength band, substrate, coating behavior, blocking, and application fit for sensing and imaging instruments.
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Selected Models
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How to Choose
Choose by infrared region first, then confirm detector sensitivity, substrate transmission, coating band, environmental exposure, and mounting requirements. IR filters often need material choices that differ from visible filters.
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IR Filters
OPTOStokes IR filters cover near-infrared (750-1100nm), short-wavelength infrared (SWIR 1.1-2.5µm), mid-wavelength infrared (MWIR 3-5µm), and long-wavelength infrared (LWIR 8-14µm) applications. The IR bandpass and longpass filters in this section serve thermal imaging cameras, IR spectroscopy, gas sensing, and IR communication systems.
IR Bandpass Filters
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| Model | CWL (nm) | Transmittance | FWHM (nm) | Optical Density |
|---|---|---|---|---|
| STO-BP680 | 680±2 | T≥90% | 10-20 | OD≥3@300-1100 |
| STO-BP1120 | 1120±2 | T≥90% | 10-20 | OD≥3@300-1200 |
| STO-BP1150 | 1150±2 | T≥90% | 10-20 | OD≥3@300-1200 |
| STO-BP1173 | 1173±2 | T≥90% | 10-20 | OD≥3@300-1200 |
| STO-BP1250 | 1250±2 | T≥70% | 10-20 | OD≥3@700-1800 |
| STO-BP1285 | 1285±2 | T≥70% | 10-20 | OD≥3@1000-1700 |
| STO-BP1455 | 1455±2 | T≥50% | 10-20 | OD≥3@1200-1800 |
| STO-BP1535 | 1535±2 | T≥90% | 10-20 | OD≥3@600-2000 |
| STO-BP1545 | 1545±2 | T≥90% | 10-20 | OD≥3@600-2000 |
| STO-BP1550 | 1550±2 | T≥90% | 10-20 | OD≥3@600-2000 |
| STO-BP1555 | 1555±2 | T≥90% | 10-20 | OD≥3@600-2000 |
| STO-BP1570 | 1570±2 | T≥90% | 10-20 | OD≥3@1250-1700 |
| STO-BP1615 | 1615±2 | T≥90% | 10-20 | OD≥3@1450-1900 |
| STO-BP1620 | 1620±2 | T≥70% | 10-20 | OD≥3@1450-1900 |
| STO-BP1625 | 1625±2 | T≥70% | 10-20 | OD≥3@1450-1900 |
| STO-BP1655 | 1655±5 | T≥70% | 10-20 | OD≥3@1350-2200 |
| STO-BP1660 | 1660±5 | T≥70% | 10-20 | OD≥3@1350-2200 |
| STO-BP1680 | 1680±10 | T≥90% | 10-20 | OD≥3@800-3000 |
| STO-BP1685 | 1685±2 | T≥80% | 10-20 | OD≥3@1550-2000 |
| STO-BP1695 | 1695±2 | T≥80% | 10-20 | OD≥3@1550-2000 |
| STO-BP1935 | 1935±2 | T≥60% | 10-20 | OD≥3@800-2000 |
| STO-BP1940 | 1940±2 | T≥60% | 10-20 | OD≥3@800-2000 |
| STO-BP2050 | 2050±2 | T≥80% | 10-20 | OD≥3@800-2000 |
| STO-BP2180 | 2180±2 | T≥80% | 10-20 | OD≥3@800-2000 |
| STO-BP2230 | 2230±2 | T≥80% | 10-20 | OD≥3@800-2000 |
| STO-BP2270 | 2270±2 | T≥80% | 10-20 | OD≥3@800-2000 |
| STO-BP2340 | 2340±2 | T≥80% | 10-20 | OD≥3@800-2000 |
| STO-BP1100 | 1100±5 | T≥90% | 20-60 | OD≥3@350-1700 |
| STO-BP1120 | 1120±5 | T≥90% | 20-60 | OD≥3@350-1700 |
| STO-BP1125 | 1125±5 | T≥90% | 20-60 | OD≥3@350-1700 |
| STO-BP1150 | 1150±5 | T≥90% | 20-60 | OD≥3@350-1700 |
| STO-BP1173 | 1173±5 | T≥90% | 20-60 | OD≥3@350-1700 |
| STO-BP1200 | 1200±5 | T≥90% | 20-60 | OD≥3@350-1700 |
| STO-BP1235 | 1235±5 | T≥90% | 20-60 | OD≥3@350-1700 |
| STO-BP1245 | 1245±5 | T≥90% | 20-60 | OD≥3@350-1700 |
| STO-BP1250 | 1250±5 | T≥90% | 20-60 | OD≥3@350-1700 |
| STO-BP1290 | 1290±5 | T≥90% | 20-60 | OD≥3@350-1700 |
| STO-BP1300 | 1300±5 | T≥90% | 20-60 | OD≥3@350-1700 |
| STO-BP1320 | 1320±5 | T≥90% | 20-60 | OD≥3@350-1700 |
| STO-BP1340 | 1340±5 | T≥90% | 20-60 | OD≥3@350-1700 |
| STO-BP1380 | 1380±5 | T≥90% | 20-60 | OD≥3@350-1700 |
| STO-BP1430 | 1430±5 | T≥90% | 20-60 | OD≥3@350-1700 |
| STO-BP1445 | 1445±5 | T≥90% | 20-60 | OD≥3@350-1700 |
| STO-BP1450 | 1450±5 | T≥90% | 20-60 | OD≥3@350-1700 |
| STO-BP1530 | 1530±5 | T≥90% | 20-60 | OD≥3@350-1700 |
| STO-BP1535 | 1535±5 | T≥90% | 20-60 | OD≥3@350-1700 |
| STO-BP1540 | 1540±5 | T≥90% | 20-60 | OD≥3@350-1700 |
| STO-BP1550 | 1550±5 | T≥90% | 20-60 | OD≥3@350-1700 |
| STO-BP1570 | 1570±5 | T≥90% | 20-60 | OD≥3@350-1700 |
| STO-BP1575 | 1575±5 | T≥90% | 20-60 | OD≥3@350-1700 |
| STO-BP1600 | 1600±5 | T≥90% | 90-100 | OD≥3@350-1700 |
| STO-BP1610 | 1610±5 | T≥90% | 90-100 | OD≥3@350-1700 |
| STO-BP1630 | 1630±5 | T≥90% | 90-100 | OD≥3@350-1700 |
| STO-BP1650 | 1650±5 | T≥90% | 20-60 | OD≥3@350-1700 |
| STO-BP1654 | 1654±5 | T≥90% | 20-60 | OD≥3@350-1700 |
| STO-BP1660 | 1660±5 | T≥90% | 20-60 | OD≥3@800-3000 |
| STO-BP1680 | 1680±5 | T≥90% | 20-60 | OD≥3@800-3000 |
| STO-BP1700 | 1700±5 | T≥90% | 90-100 | OD≥3@800-2000 |
| STO-BP1714 | 1714±5 | T≥90% | 90-100 | OD≥3@800-2000 |
| STO-BP1716 | 1716±5 | T≥90% | 90-100 | OD≥3@800-2000 |
| STO-BP1780 | 1780±5 | T≥90% | 40-70 | OD≥3@200-3000 |
| STO-BP1800 | 1800±5 | T≥90% | 40-70 | OD≥3@200-3000 |
| STO-BP1810 | 1810±5 | T≥90% | 40-70 | OD≥3@200-3000 |
| STO-BP1818 | 1818±5 | T≥90% | 40-70 | OD≥3@200-3000 |
| STO-BP1830 | 1830±5 | T≥90% | 40-70 | OD≥3@200-3000 |
| STO-BP1920 | 1920±5 | T≥90% | 40-70 | OD≥3@200-3000 |
| STO-BP1930 | 1930±5 | T≥90% | 40-70 | OD≥3@200-3000 |
| STO-BP1935 | 1935±5 | T≥90% | 40-70 | OD≥3@200-3000 |
| STO-BP1940 | 1940±5 | T≥90% | 40-70 | OD≥3@200-3000 |
| STO-BP1945 | 1945±5 | T≥90% | 40-70 | OD≥3@200-3000 |
| STO-BP1950 | 1950±5 | T≥90% | 40-70 | OD≥3@200-3000 |
IR Longpass Filters
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| Model | Cut-On (nm) | Transmittance | Transmission Range (nm) | Optical Density |
|---|---|---|---|---|
| STO-LP900 | 900±5 | T≥90% | 910-1100 | OD≥3@350-880 |
| STO-LP910 | 910±5 | T≥90% | 920-1100 | OD≥3@350-890 |
| STO-LP920 | 920±5 | T≥90% | 930-1100 | OD≥3@350-900 |
| STO-LP920 | 920±10 | T≥90% | 940-1700 | OD≥3@350-890 |
| STO-LP930 | 930±5 | T≥90% | 940-1100 | OD≥3@350-910 |
| STO-LP940 | 940±5 | T≥90% | 950-1100 | OD≥3@350-920 |
| STO-LP950 | 950±5 | T≥90% | 970-1100 | OD≥3@350-930 |
| STO-LP970 | 970±5 | T≥90% | 980-1100 | OD≥3@350-940 |
| STO-LP1000 | 1000±10 | T≥90% | 1020-2000 | OD≥3@350-970 |
| STO-LP1010 | 1010±10 | T≥90% | 1030-1200 | OD≥3@350-990 |
| STO-LP1060 | 1060±10 | T≥88% | 1085-1100 | OD≥3@350-1035 |
| STO-LP1150 | 1150±10 | T≥90% | 1180-1700 | OD≥3@700-1120 |
| STO-LP1170 | 1170±10 | T≥90% | 1200-1700 | OD≥3@700-1135 |
| STO-LP1200 | 1200±10 | T≥90% | 1230-1800 | OD≥3@350-1175 |
| STO-LP1250 | 1250±10 | T≥90% | 1260-1750 | OD≥3@350-1215 |
| STO-LP1270 | 1270±10 | T≥90% | 1300-1800 | OD≥3@350-1240 |
| STO-LP1380 | 1380±10 | T≥90% | 1400-2150 | OD≥3@700-1360 |
| STO-LP1400 | 1400±10 | T≥90% | 1420-1100 | OD≥3@350-1380 |
| STO-LP1450 | 1450±10 | T≥90% | 1480-1800 | OD≥3@350-1420 |
| STO-LP1470 | 1470±10 | T≥90% | 1500-1800 | OD≥3@350-1400 |
| STO-LP1600 | 1600±10 | T≥90% | 1625-2300 | OD≥3@350-1540 |
Related Engineering Notes
Substrate and coating constraints
Material choice can limit usable wavelength range before coating performance is considered. Confirm substrate first for IR applications.
Thermal imaging and sensing
For thermal or gas-sensing work, specify the target absorption band, blocking range, and operating environment.
FAQ
Which IR regions are covered?
The page covers near infrared, short-wave infrared, mid-wave infrared, and long-wave infrared filter needs where data is available.
Why does substrate matter for IR filters?
Substrate materials have different transmission ranges, so the material must support the target infrared wavelength band.
Can IR filters be customized?
Yes. Custom wavelength bands, sizes, substrate choices, and coating targets can be discussed for infrared systems.
Quality & Compliance
Documentation-ready optical filter supply
For OEM programs, laboratory instruments, and industrial systems, OPTOStokes keeps quality, material compliance, and engineering support visible from the start of supplier evaluation.
Quality system
ISO 9001 managed production
Process control, inspection records, and repeatable coating workflows for production optical components.
Material compliance
RoHS / REACH support
Compliance documentation can be prepared for qualified projects and regulated supply chains.
Factory-direct
Custom coating and dimensions
Wavelength, FWHM, substrate, AOI, size, and mounting requirements can be reviewed with engineering.
Procurement ready
Quote and data review
Share target wavelength, blocking level, transmittance, and drawing requirements for a focused quote.
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