Fluorescence Filter
A fluorescence filter set is a coordinated optical system that includes an excitation filter, an emission filter, and a dichroic beamsplitter. Together, these components select the excitation wavelength, separate the illumination and detection paths, block unwanted background light, and transmit the fluorescence signal to the detector.
Fluorescence Filter Overview
Fluorescence Filters are precision optical filters designed for fluorescence excitation and emission separation. They selectively transmit required excitation or emission wavelengths while blocking unwanted spectral components.
Using advanced dielectric coating technology, fluorescence filters provide high transmission at target wavelengths, excellent blocking performance and low autofluorescence. They are widely used in fluorescence microscopy, biomedical imaging, spectroscopy and optical detection systems.
Chenyu Optics supports custom fluorescence filter manufacturing according to customer drawings, including custom substrate material, dimensions, wavelength range and coating design (excitation, emission or dichroic) for prototype and repeat production.
Key Advantages of Fluorescence Filter
Fluorescence Microscopy & Biomedical Imaging
Fluorescence filters are widely used for excitation/emission separation in fluorescence microscopy systems, biomedical imaging equipment and life science instruments.
Components of a Fluorescence Filter Set
A complete fluorescence filter set coordinates three wavelength-selective components so the illumination and detection channels work together. Each component is designed around the fluorophore, light source, detector and system geometry.
| Component | Position | Function |
|---|---|---|
| Excitation Filter | Illumination path | Selects excitation wavelength |
| Dichroic Beamsplitter | Between source and detector | Reflects excitation and transmits emission |
| Emission Filter | Detection path | Blocks excitation and transmits fluorescence |
Information Required for Filter-Set Design
To design a matched fluorescence filter set, please provide the following optical, spectral and mechanical information:
Typical Specifications of Fluorescence Filter
| Material Options | BK7, Fused Silica |
|---|---|
| Coating Type | Excitation / Emission / Dichroic coatings |
| Optical Function | Fluorescence excitation and emission separation |
| Transmission Range | Custom wavelength range |
| Blocking Performance | High optical density outside passband |
| Autofluorescence | Low |
| Surface Quality | High precision optical finish |
| Coating Performance | Precision controlled |
Spectral Transmission Curve (Typical)
Why Choose Chenyu Optics for Fluorescence Filter
Chenyu Optics focuses on drawing-based precision filter manufacturing for microscopy, biomedical imaging, spectroscopy and life science optical systems. We support prototype verification, small-batch production and repeat manufacturing for non-standard fluorescence filters.
Manufacturing Capability for Fluorescence Filter
Precision Polishing
High surface quality processing for stable filter performance.
Dielectric Coating
High performance excitation, emission and dichroic coatings for precise fluorescence separation.
Inspection & Packaging
Strict quality control on wavelength, bandwidth and blocking performance, with clean protective packaging before shipment.
Custom Fluorescence Filter Options
Bandpass Filter Type Comparison
| Filter Type | Typical FWHM | Peak Transmission | Blocking (OD) | Typical Applications |
|---|---|---|---|---|
| Fluorescence Filter | 10 – 40 nm (excitation/emission) | >90% | OD4 – OD6+ | Fluorescence microscopy, biomedical imaging |
| Narrow Bandpass Filter | 1 – 10 nm | >90% | OD4 – OD6+ | Laser line selection, fluorescence |
| Standard Bandpass Filter | 10 – 50 nm | >90% | OD4 – OD6+ | Machine vision, instrumentation |
| Wide Bandpass Filter | 50 – 200 nm | >90% | OD4 – OD6 | Imaging, spectroscopy |
Applications of Fluorescence Filter
Fluorescence Microscopy Systems
Excitation and emission separation for microscopy imaging.
Biomedical Imaging Equipment
Precision spectral filtering for biomedical imaging applications.
Life Science Instruments
Fluorescence filtering for life science research equipment.
Spectroscopy Systems
Wavelength separation for spectroscopic measurement systems.
Optical Detection Systems
High signal-to-background filtering for detection instruments.
Molecular Analysis Equipment
Precision fluorescence filtering for molecular analysis platforms.
Fluorescence Filter FAQ
What is the function of a fluorescence filter?
A fluorescence filter separates excitation light from emitted fluorescence signals to improve detection performance.
What types of fluorescence filters are available?
Common types include excitation filters, emission filters, and dichroic filters used together in fluorescence systems.
Can fluorescence filters be customized for different fluorophores?
Yes. Center wavelength, bandwidth, blocking range, and coating design can be customized.
Why is blocking performance important for fluorescence filters?
High blocking performance reduces unwanted excitation light and improves signal contrast.
What information should I provide for a quotation?
Please provide excitation/emission wavelength, bandwidth, substrate material, dimensions, quantity and drawing if available.
Where can I learn more about fluorescence filter design?
Additional information on fluorescence filter design can be found from Edmund Optics.
Related Products for Fluorescence Filter
Need Custom Fluorescence Filters?
Send us your excitation/emission wavelength, bandwidth, substrate, dimensions, coating requirements and quantity. Chenyu Optics will review the optical and mechanical specifications and provide a suitable fluorescence filter manufacturing suggestion.