QED Technologies MRF Polishing

QED Technologies

MRF Polishing

Polish Smarter. Polish Better.

MRF™ polishing, exclusively available from QED, is flexible and fast, reliable and accurate. With an MRF machine on your shop floor, you can polish optical surfaces to pristine form, figure, and finish, regardless of symmetry, geometry, or slope variation. Our family of MRF systems offers many advantages that eliminate the inherent problems of classical polishing.

MRF Technology

Polish Smarter. Polish Better.

MRF polishing brings more capability and flexibility to precision optics polishing.

Advantages of MRF

MRF brings precision, determinism and repeatability to precision optics manufacturing.

  • Provides a completely deterministic process that can be characterized to very high precision
  • Conforms to complex surfaces, providing the flexibility to polish aspheric and full freeform shapes
  • Reduces cycle times due to its high rate of removal
  • Maintains process stability
  • Provides a system for precision optics manufacturing that broadens design options and enhances cost effectiveness
  • Polishes spherical lenses, aspheric lenses, prisms, freeforms and more.

MRF Polishing

Produce Better Optics Faster.

QED's MRF computer-controlled polishing systems deterministically produce better high-precision optics.

QED Technologies MRF Polishing

Unparalleled Accuracy & Repeatability

  • High-precision surfaces (lambda/50)
  • Correction of transmitted wavefront (windows, phase plates, entire system correction on one surface)
  • Optical glasses, single crystals (calcium fluoride, silicon…) and ceramics
  • Square and rectangular aperture surfaces such as prisms, cylinders, and photoblank substrates
  • Mild & wild aspheres, cylinders and freeforms
  • High-aspect-ratio optics and substrates (thin film filters, etalon substrates, semiconductor wafers etc.)

MRF does what many people in the optics business used to consider impossible.

  • Polishes spherical, aspherical, freeform, cylindrical or any other mathematically defined shape
  • Addresses thickness uniformity (important for silicon-on-insulator semiconductor wafer applications) or optical thickness

MRF can also improve the surface integrity by:

  • Removing micro-cracks and subsurface damage
  • Removing residual stresses
  • Improving glass resistance to laser damage

MRF Polishing

How MRF Works

The MR fluid is a magnetically-sensitive (magnetorheological) “smart fluid” that changes viscosity in milliseconds when exposed to a magnetic field.

QED Technologies MRF Polishing

MRF Polishing

How MRF Works

Watch this animation showing how MRF works.

The magnetic field creates a stiff structure of iron particles that forces water and abrasives to the top in a thin layer. A converging gap is created. Cores are formed, creating a sheared layer of fluid. Pressure gradients result and high-velocity, shear-based removal is created.

A workpiece is installed at a fixed distance from a moving spherical wheel. An electromagnet located below the wheel surface generates a magnetic field in the gap between the wheel and workpiece. When the MR fluid is delivered to the wheel, it is pulled against the wheel surface by the magnetic field and the act of plunging the workpiece into the ribbon of MR fluid creates a subaperture polishing tool otherwise known as a “spot”.  A sophisticated computer program determines a schedule for varying the position of the workpiece as it sweeps through the polishing zone, in either a rotational or raster path.

A computer numerical controlled, precision workstation, and sophisticated computer algorithms help ensure that the MRF polishing system is automated and robust. An easy-to-use touchscreen interface guides the operator through every step of the automated process. Stability, predictability and repeatability characterize every MRF polishing cycle.

INTUITIVE AND EASY-TO-USE

  • Optical surface errors are fully characterized on an interferometer and transferred to the MRF system.
  • User-friendly software calculates the optimal toolpath required to correct the surface errors.
  • Pre-run setup is verified with an integrated simulation.
  • Progress is monitored real time during polishing.
  • Advanced analysis features evaluate final results.

QED Technologies

Featured Products

MRF Polishing

Q-Flex 100

The Q-flex 100 brings more capability and efficiency to any optics shop, from prototypes to volume production.

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QED Technologies Q-Flex 100

MRF Polishing

Q-Flex 300

The Q-flex 300 brings more capability and efficiency to any optics shop, from prototypes to volume production.

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QED Technologies Q-Flex 300

MRF Polishing

Q22-600

The Q22-600 presents more options for polishing large-aperture precision optics.

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QED Technologies Q22-600

MRF Polishing

Q22-750P2

A large-aperture MRF machine, the Q22-750P2 extends MRF figuring capability to large, long radius parts.

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QED Technologies Q22-750P2

MRF Polishing

Q22-1200

Polish and finish ground freeform optics up to 1.2 meters in size to high precision, with one machine!

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QED Technologies Q22-1200

Learning Center

Visit the Learning Center to download product brochures, application case studies, technical papers and more!

Learning Center

Events

QED attends trade fairs and conferences all over the world. Click here to find out where we’ll be in 2022.

News & Events

Elite 100

Meet optics manufacturers who use MRF and SSI technologies to produce world class precision optics.

Elite 100

Contact

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