BP565nm Bandpass Filter | FWHM 20nm, Thickness 0.7mm

The BP565-20nm-0.7mm bandpass filter represents the ultimate in compact optical filter design, combining precise spectral selectivity with an exceptionally thin 0.7mm substrate profile. This ultra-thin bandpass filter features a 20nm full width at half maximum (FWHM) centered at 565nm, delivering excellent wavelength discrimination for yellow-orange fluorophore detection in space-constrained applications. With a precisely controlled transmission window spanning 557-568nm and comprehensive blocking from 350-1100nm at transmission less than 1%, this filter enables clean signal isolation while occupying minimal optical path length. The ultra-thin 0.7mm substrate makes it ideal for portable instruments, multi-filter stacks, and weight-sensitive optical assemblies. Manufactured by OPTOStokes using advanced high precision coating technology, this filter delivers exceptional performance for demanding applications where size and weight matter.

Technical Specifications

Key Performance Features

This 565nm filter achieves remarkable spectral performance in an ultra-compact package. The 20nm FWHM provides an optimal balance between wavelength selectivity and light collection efficiency, making it ideal for detecting Cy3, TRITC, and rhodamine derivatives while maintaining adequate separation from green and far-red fluorescence channels. Peak transmission exceeding 90% across the 557-568nm range ensures maximum signal throughput despite the narrow passband.

The revolutionary 0.7mm substrate thickness represents a 30% reduction compared to standard 1.0mm filters and a 65% reduction versus conventional 2.0mm substrates. This ultra-thin profile delivers critical advantages for modern optical instrument design. The minimal thickness reduces optical path length, virtually eliminating focal shift in tightly designed optical systems. Multiple filters can be stacked in filter wheels and motorized changers without exceeding mechanical clearance limits. The dramatically reduced mass enables faster switching speeds in automated filter selection mechanisms and minimizes bearing loads in precision positioning stages.

Despite the ultra-thin substrate, the filter maintains comprehensive blocking performance with transmission below 1% (optical density greater than 2) from 350-1100nm. This effective rejection suppresses green channel crosstalk, blocks excitation light from 530-555nm sources, and eliminates far-red and near-infrared interference. Advanced optical coating technology ensures coating stability and environmental durability even on the thin substrate.

Applications

The BP565-20nm-0.7mm bandpass filter excels in applications demanding both optical precision and minimal size:

Portable and Handheld Fluorescence Instruments: Point-of-care diagnostic devices, field-deployable environmental sensors, and handheld fluorescence readers require compact, lightweight optical components. The 0.7mm thickness enables ultra-compact optical detection modules while maintaining professional-grade spectral performance. This fluorescence detection capability supports applications in medical diagnostics, water quality testing, and on-site chemical analysis.

Multi-Position Filter Wheels: Automated microscopy and spectroscopy systems utilize motorized filter wheels for rapid wavelength selection. The ultra-thin profile allows 8-12 filter positions within the same wheel diameter where conventional 2.0mm filters limit capacity to 5-6 positions. The reduced rotational inertia enables faster switching speeds and lower motor power consumption.

Fluorescence Microscopy: The filter efficiently captures Cy3, TRITC, and rhodamine emissions in immunofluorescence, cellular imaging, and FISH applications. The 20nm bandwidth provides good spectral separation from green GFP/FITC channels and red mCherry/Texas Red channels in multi-color imaging experiments. Microscopy optics benefit from the minimal focal shift this thin substrate provides.

Compact Flow Cytometry Systems: Benchtop and portable flow cytometers require space-efficient optical assemblies. The BP565 filter enables detection of PE-Cy3 and similar tandem conjugates in compact multi-channel detection systems. The thin profile facilitates tight component spacing in miniaturized cytometer designs.

Endoscopic and Medical Imaging: Minimally invasive medical imaging systems demand ultra-compact optical components. The 0.7mm thickness enables integration into small-diameter endoscope heads and catheter-based imaging devices for fluorescence-guided surgery and diagnostic imaging.

Customization and Service

OPTOStokes provides comprehensive customization for ultra-thin filter applications. Spectral parameters including center wavelength (555-575nm range) and FWHM (15-25nm) can be optimized for specific fluorophores. Geometric options include circular formats from 6mm to 50mm diameter, plus square, rectangular, and custom shapes. The 0.7mm thickness can be maintained or adjusted to 0.5mm for extreme miniaturization or 1.0mm for enhanced rigidity.

Mounting solutions range from unmounted filters for direct bonding to pre-mounted configurations in threaded rings and filter cubes. Custom coatings accommodate specific blocking requirements or multi-band designs. Environmental hardening ensures reliable performance in demanding conditions.

Quality and Availability

Every filter undergoes rigorous spectral verification and quality inspection. OPTOStokes maintains inventory of common configurations for rapid delivery, with custom specifications typically shipping within 3-4 weeks. Our ISO 9001:2015 certified processes ensure consistent quality across all production volumes.

Contact Us

The BP565-20nm-0.7mm filter exemplifies OPTOStokes' commitment to innovative optical solutions. Whether you need this exact specification or a customized variant, our team is ready to support your project. Contact sales@optofilters.com to discuss requirements, request technical documentation, or obtain pricing. Visit www.optofilters.com for complete product information and technical resources.