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BN940 Narrow Near-IR Bandpass Filter
BN940 Narrow Near-IR Bandpass filters feature a narrow band design with improved blocking of unwanted light and greater insensitivity to short shifting, making them particularly essential when 940nm lighting is used together with a short focal length camera lens.
940nm LEDs are commonly used in remote control devices and in security/surveillance lighting. 940nm illumination is often considered “covert,” as little if any faint red glow is produced from these LEDs, even in complete darkness. Unfortunately CMOS and CCD cameras have greatly reduced sensitivity at these wavelengths, and strong ambient light can often make imaging in this range very difficult.
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Technical Specifications:
| CWL | 940nm |
| Dimension | customized, from 2x2mm to Dia. 110mm, +/-0.1mm |
| Clear Aperture | >90% |
| Center Wavelength Tolerance |
+/-2nm,+/-5nm |
| Surface Quality | 60/40 |
| FWHM | 6nm, 10nm, 20nm, 30nm, 40nm,55nm 60nm |
| Thickness | 0.3-3mm |
| Transmission | >85%@940nm |
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2.Fast Response:2 hours within our worktime,12 hours get off work.
3. Good Service:We can supply you from design,measure to coating one stop service
4.MOQ: No MOQ requirement, you can sent your order at any time
5. After-sales Service:If bad quality,we will refund.
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Step 2. We will response or quote you within 24 hours.
Step 3.Place order through email,Skype,MSN,QQ directly.
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