FKBV10

• 10 mounted hard-coated bandpass filters in one kit.
• 10 nm FWHM for each filter.
• Covers 351–800 nm center wavelengths.
• Includes filters optimized for wavelengths across the UV/visible/NIR boundary and visible spectrum.
• Filters use durable hard-coated dielectric coatings.
• Ø25 mm (Ø1") mounted format.
• Ø21 mm clear aperture.
• Filters are approximately 3.5 mm thick.
• Individual filter mounts are labeled with center wavelength and FWHM.
• Each filter is supplied in a foam-lined storage box for protection and organization.
• Filters can be installed into compatible Ø1" lens tubes and filter mounts using retaining rings.
• Provides a convenient selection of commonly used wavelengths for spectroscopy, imaging, photonics, and optical measurements.

The Thorlabs FKBV10 is a set of 10 mounted hard-coated VIS/NIR bandpass filters, designed to transmit a well-defined wavelength band while rejecting unwanted radiation outside the passband.

Each filter has a 10 nm full width at half maximum (FWHM) and is designed around a different center wavelength, providing a convenient collection of narrowband filters for optical experiments. The kit covers center wavelengths from 351 nm to 800 nm.

The filters use hard-coated dielectric coatings on UV fused silica substrates. This coating technology provides high transmission in the passband, steep transitions at the edges of the passband, and strong suppression outside the transmission region. The hard-coated construction also provides greater durability than many conventional soft-coated interference filters.

Each filter is mounted in an unthreaded Ø25.0 mm black-anodized aluminum ring. The mounted filters can be installed into compatible Ø1" lens tubes and filter mounts using retaining rings, making them easy to incorporate into existing optical setups.

The filters are also engraved with the center wavelength, FWHM, lot number, and transmission direction, making individual filters easy to identify during experiments. Thorlabs notes that the indicated transmission direction primarily affects backscatter and reflection rather than the filter's filtering performance.

Product Type: Hard-Coated Bandpass Filter Kit
Part Number: FKBV10
Number of Filters: 10
Filter Type: Bandpass
Spectral Region: VIS/NIR
Center Wavelengths: 351–800 nm
FWHM: 10 nm
Optic Diameter: Ø25.0 mm (Ø1")
Clear Aperture: Ø21 mm
Substrate: UV Fused Silica
Coating Type: Hard-Coated Dielectric
Filter Thickness: 3.5 mm
Mount Material: Black-Anodized Aluminum
Mount Type: Unthreaded Ø25 mm Ring
Storage: Foam-Lined Storage Box
Mounting: Compatible with Ø1" Lens Tubes / Filter Mounts
Typical AOI: 0°

The FKBV10 is suitable for a wide range of optical and photonics applications, including:

• Spectral Selection
• Laser Line Selection
• Optical Spectroscopy
• Fluorescence Detection
• Raman Spectroscopy
• Photoluminescence
• Microscopy
• Fluorescence Imaging
• Machine Vision
• Scientific Imaging
• Optical Sensors
• Photodiode Measurements
• Laser Beam Analysis
• Optical Instrumentation
• Photonics Research
• Quantum Optics
• University Teaching Laboratories
• Laboratory Optical Setups

The FKBV10 is particularly useful when researchers need to quickly switch between several narrow spectral bands during an experiment. The collection of 351, 400, 450, 500, 550, 600, 650, 700, 750, and 800 nm filters provides broad coverage across the UV/visible/NIR region while maintaining a consistent 10 nm FWHM bandwidth.