Edge Filter
Edge Filters are precision optical filters designed to separate wavelength regions by creating a sharp transition between the transmission band and rejection band. Using multilayer dielectric coatings, edge filters provide high transmission in the passband and effective blocking in the rejection band. Chenyu Optics manufactures edge filters in BK7 and fused silica, available as shortpass or longpass edge coatings with custom edge wavelength.
Edge Filter Overview
Edge Filters are precision optical filters designed to separate wavelength regions by creating a sharp transition between the transmission band and rejection band.
Using multilayer dielectric coatings, edge filters provide high transmission in the passband and effective blocking in the rejection band. They are widely used in fluorescence imaging, spectroscopy, machine vision, optical sensors and laser systems.
Chenyu Optics supports custom edge filter manufacturing according to customer drawings, including custom substrate material, dimensions, edge wavelength and coating design (shortpass or longpass) for prototype and repeat production.
Key Advantages of Edge Filter
Fluorescence Imaging & Spectral Separation Systems
Edge filters are widely used for sharp spectral separation in fluorescence imaging, spectroscopy instruments, machine vision, optical sensors and laser systems.
Typical Specifications of Edge Filter
| Material Options | BK7, Fused Silica |
|---|---|
| Coating Type | Dielectric edge coating |
| Optical Function | Spectral region separation |
| Filter Type | Shortpass / Longpass edge filter |
| Edge Wavelength | Customizable |
| Transition Slope | Precision controlled |
| Surface Quality | High precision optical finish |
| Coating Performance | Stable spectral response |
Spectral Transmission Curve (Typical)
Why Choose Chenyu Optics for Edge Filter
Chenyu Optics focuses on drawing-based precision filter manufacturing for fluorescence, spectroscopy, machine vision and laser optical systems. We support prototype verification, small-batch production and repeat manufacturing for non-standard edge filters.
Manufacturing Capability for Edge Filter
Precision Polishing
High surface quality processing for stable filter performance.
Dielectric Coating
High performance multilayer dielectric coating for sharp spectral edge control.
Inspection & Packaging
Strict quality control on edge wavelength and transition slope, with clean protective packaging before shipment.
Custom Edge Filter Options
Edge Filter Type Comparison
| Filter Type | Passband | Rejection Band | Typical Applications |
|---|---|---|---|
| Shortpass Edge Filter | Below cut-off wavelength | Above cut-off wavelength | Short-wavelength imaging, UV/visible separation |
| Longpass Edge Filter | Above cut-on wavelength | Below cut-on wavelength | Fluorescence imaging, long-wavelength sensing |
Applications of Edge Filter
Fluorescence Imaging Systems
Sharp spectral separation for fluorescence excitation and emission paths.
Spectroscopy Instruments
Precise edge filtering for spectroscopic measurement systems.
Machine Vision Systems
Wavelength separation for machine vision and inspection equipment.
Optical Sensors
Spectral edge filtering for optical sensor design.
Laser Optical Systems
Sharp spectral transition control for laser system beam paths.
Spectral Imaging Equipment
Precision wavelength separation for spectral imaging platforms.
Edge Filter FAQ
What is an edge filter used for?
An edge filter separates wavelength regions by sharply transitioning between transmitted and blocked spectral bands.
What types of edge filters are available?
Common types include longpass edge filters and shortpass edge filters, depending on the required spectral separation.
Can edge wavelength be customized?
Yes. Cut-on wavelength, cut-off wavelength, substrate material, and dimensions can be customized.
Does incident angle affect edge filter performance?
Yes. The spectral edge position may shift with incident angle, so coating design should match the optical system.
What information should I provide for a quotation?
Please provide filter type (shortpass or longpass), edge wavelength, substrate material, dimensions, angle of incidence, quantity and drawing if available.
Where can I learn more about edge filter design?
Additional information on edge filter design can be found from Edmund Optics.
Related Products for Edge Filter
Need Custom Edge Filters?
Send us your filter type (shortpass or longpass), edge wavelength, substrate, dimensions, coating requirements and quantity. Chenyu Optics will review the optical and mechanical specifications and provide a suitable edge filter manufacturing suggestion.