Products Description
BP430-10nm Bandpass Filter | 430nm CWL, 10nm FWHM, OD5+ Blocking
The BP430-10nm is a high-precision narrow bandpass filter manufactured by OPTOStokes, engineered for demanding optical systems that require accurate wavelength selection. With a center wavelength of 430nm and a 10nm full width at half maximum (FWHM), this filter achieves transmission greater than 90 percent at the central wavelength, maximizing signal throughput for target spectral bands. It provides deep blocking across the 350nm to 1100nm range with optical density greater than 5, effectively suppressing unwanted background radiation and improving system signal-to-noise ratio. As part of our comprehensive Bandpass Filters portfolio, this component is fabricated with advanced thin-film coating technology for consistent performance and long-term durability in industrial and laboratory environments.

Technical Specifications
| Parameter | Specification |
|---|---|
| Center Wavelength (CWL) | 430nm ±2nm |
| Full Width at Half Maximum (FWHM) | 10nm ±2nm |
| Peak Transmission (at 430nm) | Greater than 90% |
| Blocking Range | 350nm – 1100nm, Optical Density Greater than 5 |
Applications
This 430nm bandpass filter is optimized for a broad range of precision optical applications. It is widely deployed in Machine Vision systems for high-accuracy object inspection and defect detection, where precise spectral filtering enhances image contrast and reduces ambient light interference. It also serves as a critical component in Fluorescence Detection setups, analytical instruments, biomedical imaging devices, and laser alignment systems. Its high optical density blocking performance makes it particularly suitable for low-light detection scenarios where background noise must be minimized to ensure reliable measurement results.
Customization & Service
OPTOStokes offers flexible customization options for the BP430-10nm filter to align with specific application requirements. We support custom geometries including round, square, and irregular shapes, as well as mounting ring options for seamless integration into your optical assemblies. With an extensive in-stock selection of standard optical filters, we deliver fast lead times for off-the-shelf components, while our in-house coating capabilities enable high-level custom specifications with reliable, predictable delivery schedules. All our products are manufactured to world-class quality and precision standards, with strict multi-stage quality control to ensure consistent performance across every production batch.
Pain Points & Inquiry Support
Many engineering and procurement teams face recurring challenges when sourcing optical filters: unpredictable lead times that delay project timelines, limited technical support for custom specifications, and inconsistent product quality that compromises overall system performance.
At OPTOStokes, we directly address these pain points with reliable lead times, dedicated technical support from experienced optical engineering experts, and flexible customization capabilities backed by decades of thin-film coating expertise. Whether you require standard in-stock filters or fully custom optical components, our team delivers tailored solutions matched to your exact requirements.
For product quotations, technical consultation, or custom design requests, contact our optical filter specialists at sales@optofilters.com, and we will respond with detailed information and pricing promptly.
Tags: optical filters fluorescence detection 430nm bandpass filter OD5 blocking 10nm FWHM machine vision