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PRODUCT OVERVIEW
Introduction
Longpass filters are optical filters designed to transmit wavelengths above a specified cut-on wavelength while blocking shorter wavelengths. By controlling the spectral transition between blocked and transmitted regions, these filters provide precise management of long-wavelength optical signals.
The performance of longpass filters is determined by key spectral characteristics such as cut-on wavelength, transition region, and out-of-band blocking. By optimizing these parameters, longpass filters can provide reliable wavelength separation for optical systems requiring precise control of transmitted and rejected light.
Applications
- Fluorescence emission detection systems
- Infrared imaging systems
- Laser protection systems
Features & advantages
- Precise cut-on wavelength control for targeted spectral transmission
- Effective blocking of shorter wavelength interference
- High transmission efficiency in the pass region
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TECHNICAL DATA
Product specifications
ENGINEERING & OPTIONS
Technical capabilities & processing options
- Optical Filter Coating:
Multilayer coating processes enable precise cut-on wavelength control and customized spectral performance for different applications. - Spectral Edge Control:
Advanced coating design allows optimization of transition steepness between blocked and transmitted wavelength regions. - Substrate and Surface Processing:
Precision substrate preparation and surface finishing ensure reliable optical quality and long-term filter performance. - Spectral Performance Verification:
Testing procedures verify transmission curves, blocking characteristics, and wavelength accuracy for consistent product quality.
CUSTOM OPTICS
Need a Custom Longpass Filter?
Share your cut-on wavelength, transmission requirements, blocking range, and filter dimensions. Our team can review optical specifications, coating design, and customization requirements for your application.
Looking for standard sizes? View stock longpass filters