OPTOStokes ultra-narrow bandpass filters are engineered for applications that demand extreme wavelength selectivity. With full-width at half-maximum (FWHM) of 1-2 nm, peak transmission ≥85% (typically >90%), and blocking ≥OD4 across the rejection band, these filters provide the precision required in laser systems, Raman spectroscopy, fluorescence microscopy, and LiDAR.
Key Performance Advantages
These filters combine exceptionally narrow bandwidth with deep blocking and high transmission—performance that is difficult to achieve simultaneously in thin-film coatings. Center wavelength accuracy reaches ±0.3 nm for most visible/NIR lines, ensuring perfect alignment with common laser sources (405 nm, 532 nm, 785 nm, 1064 nm, etc.).
In-Stock Ultra-Narrow Series (Immediate Delivery)
We maintain ready inventory of the most requested laser wavelengths in standard ∅12.7 mm and ∅25.4 mm mounted sizes.
| Product | CWL | FWHM | Peak Transmission | Blocking Range | Blocking Depth | Mounted Sizes |
|---|---|---|---|---|---|---|
| UNBP-420 | 420 ± 0.3 nm | 1 ± 0.3 nm | >85% | 400-1100nm (customizable) | ≥OD4 | ∅12.7 mm & ∅25.4 mm |
| UNBP-558 | 558 ± 0.3 nm | 1 ± 0.3 nm | >85% | 400-1100nm (customizable) | ≥OD4 | |
| UNBP-582 | 582 ± 0.3 nm | 1 ± 0.3 nm | >85% | 400-1100nm (customizable) | ≥OD4 | |
| UNBP-777 | 777.2 ± 0.3 nm | 1.2 ± 0.3 nm | >85% | 400-1100nm (customizable) | ≥OD4 | |
| UNBP-785 | 785 ± 0.3 nm | 1 ± 0.3 nm | >85% | 400-1100nm (customizable) | ≥OD4 | |
| UNBP-795 | 795 ± 0.3 nm | 2 ± 0.3 nm | >85% | 400-1100nm (customizable) | ≥OD4 | |
| UNBP-926 | 926.3 ± 0.5 nm | 1.5 ± 0.5 nm | >85% | 400-1100nm (customizable) | ≥OD4 | |
| UNBP-1064 | 1064 ± 0.5 nm | 1.7 ± 0.5 nm | >80% | 400-1100nm (customizable) | ≥OD4 | |
| UNBP-1570 | 1570 ± 1 nm | 5 ± 1 nm | >90% | 400-1100nm (customizable) | ≥OD4 |
Full Customization Capability
Need a different center wavelength, narrower/sharper FWHM, extended blocking to OD6, or unmounted substrates? Our ion-assisted deposition lines routinely achieve FWHM down to 0.5 nm and blocking beyond OD6 when required. Substrate size, shape, and AOI requirements are fully supported.
Typical Applications
• Laser line cleanup and fluorescence emission isolation
• Low-wavenumber Raman spectroscopy
• LiDAR transmitter/receiver filtering
• Hyperspectral imaging
• Biomedical instrumentation and flow cytometry
Get the Exact Filter You Need – Fast
Most in-stock items ship within 48 hours. Custom designs typically deliver in 3-5 weeks with guaranteed specifications and full traceability.
Contact our technical team at sales@optofilters.com for datasheets, transmission curves, pricing, or to discuss your specific wavelength requirements. OPTOStokes delivers world-class ultra-narrow bandpass performance you can rely on.
