MRF® Polishing
Precision Where It Matters Most
Magnetorheological Finishing (MRF) delivers consistent, nanometer-level surface correction across a wide range of materials and shapes, helping optics manufacturers meet tight specs, improve yield, and reduce cycle time.
Polishing with MRF (Magnetorheological Finishing)
MRF is a precision optical polishing technology developed by QED Technologies that delivers deterministic, repeatable surface correction for high-performance optical components. By combining computer control with a magnetically responsive polishing fluid, MRF enables manufacturers to achieve predictable results across a wide range of materials and geometries.
Unlike traditional polishing methods, MRF is fully characterizable and controllable, allowing optical surfaces to be finished with nanometer-level accuracy and significantly reduced process variability.
Benefits of MRF Polishing for Precision Optics Manufacturing
MRF provides a unique combination of precision, flexibility, and efficiency that modern optics manufacturing demands. Key benefits include:
- Deterministic polishing with predictable material removal
- Repeatable results that support high-yield production
- Shorter polishing cycles compared to traditional methods
- Flexibility to polish complex freeforms and aspheres without custom tooling
- Improved surface quality and consistency
MRF enables optics manufacturers to broaden design possibilities while improving cost effectiveness and throughput across production workflows.
Optical Materials and Surface Types Supported by MRF
MRF polishing systems can finish a wide range of optical materials, including:
- Optical glasses
- Crystals such as calcium fluoride
- Ceramics and specialty substrates
- Silicon and semiconductor materials
- Non-magnetic metals
The process supports diverse surface types, including flats, spheres, aspheres, freeforms, cylinders, windows, prisms, and other non-traditional optical components.
Unparalleled Accuracy & Repeatability with MRF
MRF delivers deterministic polishing performance that enables surface quality and correction levels once considered impossible in precision optics manufacturing. Using a stable, repeatable polishing spot, MRF achieves exceptional accuracy across a wide range of optical materials and geometries.
Achieves high-precision optical surfaces to λ/50 and better with exceptional repeatability.
Corrects transmitted wavefront errors in windows, phase plates, and full optical systems on a single surface.
Processes optical glasses, single crystals (including calcium fluoride and silicon), and advanced ceramics.
Polishes square and rectangular apertures, including prisms, cylinders, and photoblank substrates.
Accurately finishes mild and extreme aspheres, cylinders, and freeform optics.
Ideal for thin film filters, etalon substrates, and semiconductor wafers, where conventional polishing struggles.
Polishes spherical, aspherical, freeform, cylindrical, and mathematically defined surfaces with precision.
Addresses thickness uniformity and optical thickness, critical for silicon-on-insulator and wafer applications.
Surface Integrity Improvements
In addition to shape and accuracy correction, MRF enhances overall surface integrity.
- Removes micro-cracks and subsurface damage
- Eliminates residual stresses introduced by prior processes
- Improves glass resistance to laser-induced damage
QED Technologies MRF Systems
QED Technologies offers a range of MRF polishing systems designed to support different production requirements and optic sizes.
Q-flex MRF Polishing Systems
The Q-flex MRF-100 and Q-flex MRF-300 systems provide modular, production-ready platforms optimized for difficult spheres, aspheres, and freeform optics. These systems offer flexible tool configurations and robust process control for high-precision applications.
Q-forge MRF Polishing Systems
The Q-forge systems extend MRF capability to large-aperture optics, supporting components up to 600 mm and 1.2 m in diameter. These platforms are designed for demanding applications requiring exceptional accuracy and surface quality.
Learn More About MRF Polishing Technology
To learn how Magnetorheological Finishing can improve surface quality, throughput, and yield in your optics manufacturing process, explore our MRF systems, technical resources, or contact QED Technologies to speak with an applications expert.