1.Product Descriptions – 940nm Narrow Bandpass Filters:
| Characteristics: | 940nm Narrow bandpass filters |
| Central Wavelength (CWL): | 940nm |
| Peak Transmittance: | >90% |
| Full Width at Half Maximum(FWHM): | 10-60nm |
| Cut-off depth: | OD2/OD3 |
| Dimension: | Customized |
| Thickness: | Customized |
| Remark: | Can do customization per requirement |
2. Measured Spectral curve
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Picture 1: BP940-10nm Spectral Curve |
3.What is typical application for 940nm narrow bandpass filters?
The 940nm narrowband filter serves as a key component that enhances the performance of all active sensing systems using 940nm infrared light sources. The main application scenarios include: security surveillance, facial recognition and biosensing, medical detection, gesture recognition and proximity sensing, and industrial process control and sorting.
4.What is key parameter when choose for right Narrow bandpass filters:
When selecting a Narrow bandpass filters, the center wavelength (CWL) will be one of key parameter to be designated, with a tolerance of generally +/-5nm or +/7nm which depend on the user inquiry. Secondly, Full Width at Half Maximum(FWHM) means the transmittance range, for those FWHM is short, normally called narrow bandpass filters which no united definition and typically for lower than 10nm. then, Peak and Average Transmittance, e.g 90%,95%…etc. higher transmittance might need Anti-reflective(AR) coating.
other Bandpass filters in stock from Liyuan Optoelectronics: LP430 LP500 LP560 LP600 LP650 LP800。。。etc.
