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337.1/10nm Laser Bandpass Filter For Nitrogen
337.1/10nm laser bandpass filter is an optical filter designed for nitrogen laser (N₂ Laser). Coligh manufactures 254nm to 1550nm laser filters.
- Special design for N₂ Laser
- Center wavelength 337.1nm
- FWHM 10nm
- Blocking depth OD5
337.1/10nm Laer Bandpass Filter For Nitrogen Description
The 337.1/10nm laser bandpass filter is an optical filter designed specifically for nitrogen molecular lasers (N₂ Lasers). It has a central wavelength of 337.1nm±2nm, a bandwidth of 10nm (FWHM), and a peak transmittance of >90%. It accurately matches the 337.1nm characteristic spectrum of the N₂ laser to ensure efficient energy utilization. It achieves OD5 cutoff for 200-330nm and 340-1200nm. In particular, it deeply blocks the second harmonic (~674nm) and fundamental frequency light (such as 1064nm, if mixed with other laser systems) of nitrogen lasers. We use ion-assisted coating technology, combined with UV-grade fused quartz and high-quality optical glass substrates, which can withstand the typical pulse energy of nitrogen lasers.
337.1/10nm Laer Bandpass Filter For Nitrogen Datasheet
| Parameter | Specification |
| Center Wavelength (CWL) | 337.1 nm ± 2 nm |
| Bandwidth (FWHM) | 10 nm ± 2 nm |
| Peak Transmission | ≥ 15% |
| Blocking Range | < 0.001% (OD5) from 200 nm to 1200 nm |
| Suitable laser | N2 |
| Substrate Material | Fused silica / Optical glass |
| Surface Quality | 80-50， 60-40， 40-20 scratch-dig (per MIL-PRF-13830B) |
| Clear Aperture | > 90% of the diameter |
| Filter Diameter | Customizable (e.g.2.0mm, 12.5 mm, 25 mm, 50 mm) |
| Coating Type | Hard-coated, ion-Assisted coating |
| Angle of Incidence (AOI) | 0° (normal incidence) |
| Durability | MIL-STD-810E, Method 507.3 compliant |
| Tempreture | -40℃- +60℃ |
337.1/10nm Laer Bandpass Filter For Nitrogen Applications
- Fluorescence microscopy and flow cytometry
In fluorescence microscopy, nitrogen laser 337.1nm is often used to excite Hoechst dye (DNA binding) or DAPI (nuclear marker), and the 337/10nm laser bandpass filter accurately separates the 337.1nm excitation light, blocks noise in other bands, and improves image contrast and detection sensitivity. In flow cytometry, high-purity ultraviolet light excites multi-color fluorescent markers to avoid cross-interference. - Industrial material processing
337nm ultraviolet light is used for surface modification of polymer materials (such as hydrophilic treatment), and the 337.1/10nm filter can avoid thermal damage caused by infrared stray light. - Environmental monitoring
In the detection of atmospheric pollutants, nitrogen lasers are used to detect gases such as NOx and VOCs by Raman spectroscopy or fluorescence. 317.1/10nm laser bandpass filters can be used to filter out interference from solar background light - Scientific experiments
Ultrafast optical research can be performed when nitrogen lasers pump dye lasers or serve as seed sources. The pure 337nm light source can avoid harmonic interference
