Beamsplitter Filter
Beamsplitter Filters are precision optical components designed to divide an incident light beam into a transmitted portion and a reflected portion at a defined ratio. Using dielectric or metallic coating technology, beamsplitter filters provide controlled transmission/reflection splitting with stable spectral performance. Chenyu Optics manufactures beamsplitter filters in BK7 and fused silica with custom split ratios, uncoated substrates or with custom AR coatings on the non-coated face.
Beamsplitter Filter Overview
Beamsplitter Filters are precision optical components designed to divide an incident light beam into a transmitted portion and a reflected portion at a defined ratio.
Using dielectric or metallic coating technology, beamsplitter filters provide controlled transmission/reflection splitting with stable spectral performance. They are widely used in interferometers, laser systems, imaging systems, projection equipment and optical measurement instruments.
Chenyu Optics supports custom beamsplitter filter manufacturing according to customer drawings, including custom substrate material, dimensions, split ratio and coating design for prototype and repeat production.
Key Advantages of Beamsplitter Filter
Interferometer & Laser Systems
Beamsplitter filters are widely used for controlled beam division in interferometers, laser optical systems, imaging systems and measurement instruments.
Typical Specifications of Beamsplitter Filter
| Material Options | BK7, Fused Silica |
|---|---|
| Optical Function | Transmission / Reflection beam division |
| Split Ratio | Customizable (e.g. 50:50, 30:70, 90:10) |
| Coating Type | Dielectric or metallic |
| Wavelength Range | Custom (UV to NIR, design dependent) |
| Wavefront Distortion | Low |
| Surface Accuracy | λ/4 – λ/10 @ 633 nm |
| Surface Quality | 20-10 / 40-20 scratch-dig |
Spectral Transmission Curve (Typical)
Why Choose Chenyu Optics for Beamsplitter Filter
Chenyu Optics focuses on drawing-based precision filter manufacturing for interferometry, laser and imaging systems. We support prototype verification, small-batch production and repeat manufacturing for non-standard beamsplitter filters.
Manufacturing Capability for Beamsplitter Filter
Precision Polishing
High surface quality and flatness processing for stable, low-distortion beam division.
Dielectric & Metallic Coating
Precision-controlled coating deposition to achieve accurate, stable split ratios.
Inspection & Packaging
Strict quality control on split ratio, wavefront distortion and spectral performance, with clean protective packaging before shipment.
Custom Beamsplitter Filter Options
Bandpass Filter Type Comparison
| Filter Type | Typical FWHM | Peak Transmission | Blocking (OD) | Typical Applications |
|---|---|---|---|---|
| Beamsplitter Filter | N/A (transmission/reflection split, not a passband) | Set by split ratio (e.g. 50:50, 30:70) | N/A | Interferometry, laser systems, 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 |
Beamsplitter Type Comparison
| Non-Polarizing Beamsplitter | Polarizing Beamsplitter | Dichroic Beamsplitter | |
|---|---|---|---|
| Splitting Basis | Splits by intensity, independent of polarization | Splits by polarization state (s vs. p) | Splits by wavelength |
| Typical Ratio | Fixed ratio (e.g. 50:50, 30:70) for both polarizations | High transmission for one polarization, high reflection for the other | High transmission above/below a design wavelength |
| Typical Use | General beam sampling, interferometry | Polarization control in laser systems | Combining or separating different wavelength channels |
Applications of Beamsplitter Filter
Interferometers
Precision beam division for interferometric measurement.
Laser Optical Systems
Beam sampling and division for laser system design.
Imaging Systems
Beam combining and splitting for imaging optical paths.
Projection Equipment
Beam division for projection optical systems.
Optical Measurement Instruments
Precision beam sampling for measurement applications.
Scientific Research Equipment
Precision beamsplitters for research and laboratory setups.
Beamsplitter Filter FAQ
What is the function of a beamsplitter filter?
A beamsplitter filter divides an incident beam into a transmitted portion and a reflected portion at a defined ratio.
What split ratios are available?
Common split ratios include 50:50, 30:70, and 90:10, with custom ratios available according to application requirements.
What is the difference between a non-polarizing and polarizing beamsplitter?
A non-polarizing beamsplitter splits light independent of polarization, while a polarizing beamsplitter separates light based on polarization state.
Can beamsplitter filters be customized?
Yes. Custom split ratios, substrate materials, dimensions, and coating designs are available.
What information should I provide for a quotation?
Please provide desired split ratio, wavelength range, substrate material, dimensions, quantity and drawing if available.
Where can I learn more about beamsplitter design?
Additional information on beamsplitter design can be found from Edmund Optics.
Related Products for Beamsplitter Filter
Need Custom Beamsplitter Filters?
Send us your desired split ratio, wavelength range, substrate, dimensions, and quantity. Chenyu Optics will review the optical and mechanical specifications and provide a suitable beamsplitter filter manufacturing suggestion.