BP420nm Bandpass Filter | CWL 420nm±2nm, FWHM 20±2nm, 1.0mm

The OPTOStokes BP420nm is a high-precision bandpass filters optimized for small animal medical and preclinical imaging applications. Engineered with advanced ion-assisted thin film coating technology, it provides transmission greater than 70 percent across the 415–425nm range, with a center wavelength of 420nm ±2nm and a full width at half maximum of 20±2nm. This 1.0mm thick filter delivers exceptional high OD blocking across three spectral bands with graded attenuation, ensuring ultra-low background noise for sensitive biomedical imaging and small animal research systems.

Technical Specifications

Applications

This high-OD narrowband bandpass filter is specifically designed for small animal medical and life science research applications requiring precise spectral selection and deep out-of-band rejection at 420nm. Its graded blocking design and stable optical performance make it ideal for:

• Small animal in vivo fluorescence imaging systems

• Preclinical research and biomedical laboratory instruments

• Fluorescence detection and molecular imaging devices

• Laboratory animal disease model research equipment

• Biomedical analysis and life science testing systems

• Optical imaging for pharmacology and toxicology studies

Customization & Service

OPTOStokes offers comprehensive custom optical filter solutions to meet your exact small animal imaging 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 cleanroom 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

Biomedical and preclinical research teams often face critical challenges: insufficient deep-blue blocking leading to high autofluorescence background, inconsistent center wavelength accuracy across production batches, and long lead times for custom high-OD components. These issues can reduce imaging contrast, compromise experimental reproducibility, and delay research timelines. At OPTOStokes, we solve these problems with our extensive ready-to-ship inventory, precision thin-film 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.