Dichroic Filter
Dichroic Filters are precision optical filters designed to selectively transmit specific wavelength ranges while reflecting or blocking unwanted light. Using advanced dielectric coating technology, dichroic filters provide high transmission in the target band and efficient spectral separation for optical systems. Chenyu Optics manufactures dichroic filters in optical glass and fused silica with custom wavelength ranges, coating designs and substrate options.
Dichroic Filter Overview
Dichroic Filters are precision optical filters designed to selectively transmit specific wavelength ranges while reflecting or blocking unwanted spectral regions.
Using advanced dielectric coating technology, dichroic filters provide high transmission in the target wavelength band and efficient spectral separation between transmitted and reflected light. They are widely used in fluorescence imaging, laser systems, optical sensing, microscopy and beam management applications.
Chenyu Optics supports custom dichroic filter manufacturing according to customer drawings, including custom substrate materials, dimensions, wavelength ranges, coating designs and optical specifications for prototype and repeat production.
Key Advantages of Dichroic Filter
Fluorescence Imaging & Laser Systems
Dichroic filters are widely used for wavelength separation and beam management in fluorescence imaging systems, laser systems, microscopy and optical sensing equipment.
Typical Specifications of Dichroic Filter
| Material Options | Optical Glass, BK7, Fused Silica |
|---|---|
| Coating Type | Dielectric dichroic coating |
| Optical Function | Wavelength separation / selective transmission |
| Wavelength Range | Customizable |
| Transmission Band | Customizable |
| Transmission | High transmission within target band |
| Blocking | High optical density outside target band |
| Surface Quality | High precision optical finish |
Spectral Transmission Curve (Typical)
Why Choose Chenyu Optics for Dichroic Filter
Chenyu Optics focuses on drawing-based precision filter manufacturing for fluorescence imaging, laser systems, microscopy and industrial optical systems. We support prototype verification, small-batch production and repeat manufacturing for non-standard dichroic filters.
Manufacturing Capability for Dichroic Filter
Precision Polishing
High surface quality processing for stable filter performance.
Dielectric Coating
High performance dielectric dichroic coating for precise transmission and reflection control.
Inspection & Packaging
Strict quality control on transmission, reflection and blocking, with clean protective packaging before shipment.
Custom Dichroic Filter Options
Spectral Separation Filter Comparison
| Filter Type | Function | Transmission | Reflection | Typical Applications |
|---|---|---|---|---|
| Dichroic Filter | Transmit / reflect separation | >90% (target band) | >90% (reflected band) | Fluorescence, laser beam management |
| Bandpass Filter | Wavelength selection | >90% | N/A | Machine vision, instrumentation |
| Edge Filter | Cut-on / cut-off blocking | >90% | N/A | Fluorescence, spectroscopy |
| Beamsplitter | Fixed-ratio splitting | Variable (design-based) | Variable (design-based) | Laser systems, interferometry |
Applications of Dichroic Filter
Fluorescence Imaging Systems
Wavelength separation for fluorescence excitation and emission paths.
Laser Systems
Beam combining and separation in multi-wavelength laser setups.
Microscopy Equipment
Spectral separation for excitation and emission light in microscopy.
Optical Sensing Systems
Wavelength selection and separation for optical sensor design.
Beam Management Systems
Selective transmission and reflection for beam routing applications.
Projection & Display Systems
Color separation and combination for projection and display optics.
Dichroic Filter FAQ
What is a dichroic filter used for?
A dichroic filter selectively transmits a specific wavelength range while reflecting or blocking unwanted light.
What parameters define a dichroic filter?
Key parameters include transmission band, wavelength range, transmission, reflection and incident angle.
How is a dichroic filter different from a bandpass filter?
A dichroic filter is designed to reflect the blocked wavelengths rather than simply absorbing or scattering them, enabling beam separation and combination.
Can dichroic filters be customized for different wavelength ranges?
Yes. Filters can be customized for UV, visible, and near-infrared wavelength ranges.
Does incident angle affect dichroic filter performance?
Yes. The transmission and reflection bands can shift with incident angle, so coating design should match the optical setup.
What information should I provide for a quotation?
Please provide wavelength range, transmission band, substrate material, dimensions, angle of incidence, quantity and drawing if available.
Where can I learn more about dichroic filter design?
Additional information on dichroic filter design can be found from Edmund Optics.
Related Products for Dichroic Filter
Need Custom Dichroic Filters?
Send us your wavelength range, transmission band, substrate, dimensions, coating requirements and quantity. Chenyu Optics will review the optical and mechanical specifications and provide a suitable dichroic filter manufacturing suggestion.