Products Description
BP405nm Bandpass Filter | CWL 405nm, FWHM 30nm, High Transmission
The BP405nm bandpass filter is a precision dielectric-coated optical component optimized for 405nm violet laser and detection systems. It features a center wavelength of 405nm with a 30nm full-width at half-maximum passband, delivering average transmission greater than 85% across the 395–410nm spectral range. Out-of-band light from 350nm to 1100nm is suppressed with strong blocking performance, ensuring clean signal isolation for sensitive measurements. As part of OPTOStokes’ extensive portfolio of bandpass filters, this product is manufactured with advanced thin-film coating technology for consistent performance and long-term durability in industrial operating environments.
Technical Specifications
| Parameter | Specification |
|---|---|
| Center Wavelength (CWL) | 405 ± 2 nm @ Transmission > 90% |
| Full Width at Half Maximum (FWHM) | 30 ± 3 nm |
| Average Passband Transmission | > 85% @ 395 – 410 nm |
| Blocking Optical Density | OD> 2 across 350 – 1100 nm |
Applications
This 405nm bandpass filter is engineered for integration into violet and near-UV optical systems, with primary use cases including:
UV laser module assembly and alignment
Industrial inspection and defect detection systems
Spectroscopic measurement and calibration equipment
Biomedical detection and fluorescence excitation setups
Its balanced passband width and strong blocking performance make it a reliable choice for laser systems requiring precise wavelength control and low stray light.
Customization & Service
OPTOStokes provides both standard in-stock units and full custom engineering support for the BP405nm bandpass filter. We fabricate filters in circular, square, and custom irregular geometries, with optional precision mounting rings to simplify integration into your optical assembly. Our extensive in-stock inventory enables fast turnaround for standard specifications, while our in-house coating team can adjust passband parameters, substrate materials, and dimensions to match your unique project requirements. Every filter undergoes rigorous quality testing to verify optical density, transmission, and spectral uniformity, ensuring world-class precision and reliable long-term performance with transparent, dependable lead times for every order.
Support & Inquiry
Engineering and procurement teams sourcing optical filters often face persistent challenges: unpredictable lead times that delay product launch schedules, limited technical support for custom spectral adjustments, and inconsistent coating quality that degrades system performance over time. OPTOStokes addresses these pain points with clear production timelines, direct access to experienced optical engineers, and strict quality control protocols throughout the entire manufacturing process.
To discuss your BP405nm bandpass filter requirements, request a full technical datasheet, or receive a custom quotation, contact our technical sales team at sales@optofilters.com or submit your inquiry directly through our website.
Tags: bandpass filter laser filter high transmission UV filter optical density 405nm filter
