OD6 Notch Filters

Hard dielectric thin film notch filters  
Industry-leading OD6+ blocking, up to 95% average transmission, and bandwidths as narrow as 2.5% of CWL.
Two mounted 532 nm OD6 notch filters in black anodized housings on a reflective surface. One filter lies flat showing the engraved label "532 OD6 NOTCH" with a directional arrow, while the second stands upright behind it showing the deep blue interference coating and Alio Labs logo on the mount edge.

Key Features

OD6+ blocking
At laser wavelength
Fully custom designs
Made to order
Hard dielectric thin film coatings
Durable Quadrode™ plasma PVD technology
Bandwidth (FWHM) 2.5% of CWL or greater
Up to 95% average transmission
Available mounted or unmounted
Spectral transmission chart for a 532 nm OD6 notch filter, showing approximately 96% transmission across 300 to 800 nm with a sharp notch at 532 nm dropping to zero. An inset optical density chart details the blocking region from 522 to 541 nm, confirming greater than OD6 attenuation at the laser wavelength.

Technical Specifications

SPECIFICATION
PARAMETER
Center Wavelength (CWL)
355–1064 nm standard; custom available
Blocking
OD6+
Transmission
Up to 95% average
Blocking Bandwidth (FWHM)
2.5% of CWL or greater
Coating Type
Hard dielectric coatings utilizing Quadrode™ plasma PVD technology
Substrate Materials
Borofloat, Fused Silica, BK7, Custom
Surface Quality
60-40 scratch-dig
Clear Aperture
>85% of diameter on mounted parts
Configuration
Mounted or unmounted
Custom CWL / Sizing
Available on request
Environmental
Please contact for full environmental specifications
Full Specifications

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