Short Pass Filters

Ultra-steep edge thin film filters
High transmission with OD6+ blocking and ultra-steep slopes across a wide spectral range (310–1800 nm).
Request a QuoteContact Engineering
Two circular short pass optical filters overlapping at an angle, one with a dark olive-green coating and one with a vivid red-orange edge, illustrating the filter's spectral cutoff characteristics.

Key Features

Up to OD6+ blocking
Fully custom designs
Made to order
Hard dielectric thin film coatings
Durable Quadrode™ plasma PVD technology
Available mounted or unmounted
Up to 95% average transmission
Ultra steep slopes
Spectral transmission chart for a 700 nm short pass filter, showing approximately 97% transmission from 400 to 700 nm with an ultra-steep cutoff edge at 700 nm, dropping to near zero and maintaining OD6+ blocking through 1100 nm.

Technical Specifications

PARAMETER
SPECIFICATION
Spectral edge
310–1800 nm standard
Blocking
Up to OD6+
Transmission
Up to 95% average
Slope (Transition Region)
typically < 1%
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
Download data sheet

Request a Quote

Contact our team for pricing, custom specifications, and lead times.

Request a QuoteContact Engineering
Accessibility Statement
Alio Labs is committed to ensuring digital accessibility. We are continually improving the user experience and applying the relevant accessibility standards. Please contact us if we can make the website more accessible and inclusive for you.
Alio Labs Logo
Advanced thin film optics.
Legal
Terms & Conditions →
Privacy Policy →
Get in touch
info@aliolabs.com
Email Alio LabsAlio Labs on LinkedIn
© 2026 Alio Labs, Inc. All rights reserved.
Santa Rosa, CA