IR Longpass Filters
Infrared (IR) longpass filters transmit light higher than the cut-on wavelengths and attenuate the shorter wavelengths. The IR longpass filters are popularly used in spectroscopy, thermography, and metrology & device Engineering.
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Specifications
Diagram
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| Part Number | Dia (mm) | Cut-on λ (nm) | Blocking λ (nm) | Transmitting λ (nm) | T (%) |
|---|---|---|---|---|---|
| LFIR-1.05-1 | 25.4 | 1050 | 200-1050 | 1060-12000 | > 80 |
| LFIR-1.5-1 | 25.4 | 1500 | 200-1500 | 1510-12000 | > 80 |
| LFIR-1.75-1 | 25.4 | 1750 | 200-1750 | 1760-12000 | > 80 |
| LFIR-2-1 | 25.4 | 2000 | 200-2000 | 2010-12000 | > 80 |
| LFIR-2.5-1 | 25.4 | 2500 | 200-2500 | 2510-12000 | > 80 |
| LFIR-3-1 | 25.4 | 3000 | 200-3000 | 3010-12000 | > 80 |
| LFIR-3.5-1 | 25.4 | 3500 | 200-3500 | 3510-12000 | > 80 |
| LFIR-4-1 | 25.4 | 4000 | 200-4000 | 4010-12000 | > 80 |
| LFIR-4.5-1 | 25.4 | 4500 | 200-4500 | 4510-12000 | > 80 |
| LFIR-5-1 | 25.4 | 5000 | 200-5000 | 5010-12000 | > 80 |
| LFIR-5.5-1 | 25.4 | 5500 | 200-5500 | 5550-12000 | > 80 |
| LFIR-6-1 | 25.4 | 6000 | 200-6000 | 6020-12000 | > 80 |
| LFIR-6.5-1 | 25.4 | 6500 | 200-6500 | 6520-12000 | > 80 |
| LFIR-7-1 | 25.4 | 7000 | 200-7000 | 7050-12000 | > 80 |
| LFIR-7.5-1 | 25.4 | 7500 | 200-7500 | 7550-12000 | > 80 |
| LFIR-8-1 | 25.4 | 8000 | 200-8000 | 8030-12000 | > 80 |
| LFIR-8.5-1 | 25.4 | 8500 | 200-8500 | 8520-12000 | > 80 |
| LFIR-9-1 | 25.4 | 9000 | 200-9000 | 9050-12000 | > 80 |
| LFIR-9.5-1 | 25.4 | 9500 | 200-9500 | 9550-12000 | > 80 |
| LFIR-10-1 | 25.4 | 10000 | 200-10000 | 10000-12000 | > 80 |
| LFIR-10.5-1 | 25.4 | 10500 | 200-10500 | 10550-12000 | > 80 |
| LFIR-11-1 | 25.4 | 11000 | 200-11000 | 11050-12000 | > 80 |
| LFIR-11.5-1 | 25.4 | 11500 | 200-11500 | 11520-12000 | > 80 |
Diameter Tolerance: +0/-0.2mm
Clear Aperture: >80%
Thickness: <10mm
Cut-on Tolerance: ±2nm
Cut-off Tolerance: ±2nm
Peak Transmission: >70-80%
Block: <0.1%
CWL Shift: <0.02nm/℃
