BP440nm Bandpass Filter | CWL 440nm±5nm, FWHM 110±5nm, 1.0mm

The OPTOStokes BP440nm is a high-performance bandpass filters optimized for industrial machine vision blue lighting systems. Engineered with advanced thin film coating technology, it provides high transmission greater than 90 percent across the 400–480nm blue spectral range, with a center wavelength of 440nm ±5nm and a full width at half maximum of 110±5nm. This 1.0mm thick filter delivers consistent average optical density greater than 2 across 350–1100nm, effectively suppressing ambient and off-band light interference for reliable machine vision imaging performance at 0 degree angle of incidence.

Technical Specifications

Applications

This wideband blue bandpass filter is specifically engineered for industrial vision systems using blue light illumination, delivering uniform transmission and stable off-band rejection for high-contrast imaging. Its exceptional optical performance makes it ideal for:

• Industrial machine vision and automated inspection systems

• Blue LED lighting and illumination setups for vision systems

• Semiconductor surface defect and appearance inspection

• High-precision dimensional measurement and positioning

• Automated production line quality control systems

• Optical imaging and electro-optical detection devices

Customization & Service

OPTOStokes offers comprehensive custom optical filter solutions to meet your exact machine vision requirements. We manufacture bandpass filters in standard circular, square and custom irregular shapes, with optional precision mounting rings for seamless integration into your optical assemblies. Our extensive in-stock inventory ensures fast shipping for standard specifications, while our advanced manufacturing capabilities deliver custom orders with reliable, predictable lead times. All products are manufactured to world-class quality standards and undergo rigorous 100 percent optical testing before shipment.

Pain Points & CTA

Machine vision engineering teams often face critical challenges: low imaging contrast caused by ambient light interference, inconsistent spectral performance across production batches, and long lead times for custom blue-band optical components. These issues can reduce inspection accuracy, increase false defect rates, and delay production deployment. At OPTOStokes, we solve these problems with our extensive ready-to-ship inventory, precision coating technology, and dedicated technical support team. Whether you need a single prototype for testing or high-volume production runs, we deliver precision optical components on time, every time.

For detailed datasheets, volume pricing, or to discuss your specific filter requirements, contact our expert team at sales@optofilters.com or submit an inquiry through our website today.