Magnetorheological polishing (MRF)
What is magnetorheological polishing?
Magnetorheological polishing (MRF) is a high-precision optical surface processing technology that uses a polishing fluid containing magnetic particles to form a flexible and fluid polishing tool under the action of a magnetic field to achieve material removal and complete the precision polishing and correction of the optical surface. Magnetorheological fluid contains micron-sized magnetic particles. The viscosity and pressure of the liquid are controlled by a computer. MRF can accurately polish the surface of optical components to achieve nano-level smoothness. It is suitable for optical components with complex shapes and achieves high-precision and flexible optical surface processing. It is widely used in the field of high-end optical manufacturing, mainly for the final polishing of optical glass and high-hardness materials, and well meets the ultra-precision processing needs of optical components in aerospace, aviation, and defense.
Advantages of MRF Polishing:
–Highly flexible polishing tools can precisely adapt to complex surface shapes.
–No thermal stress is introduced during the polishing process, suitable for the processing of high-precision optical components.
–Can achieve nanometer-level surface finish and shape accuracy.
MRF Polishing at Yudi
At Yudi, we leverage this state-of-the-art MRF polishing technology to enhance quality and efficiency in optical processing, ensuring superior results and optimized processes for all your optical needs.
As the most advanced polishing technology, magnetorheological polishing offers numerous advantages and exceptional processing strengths. However, this technology requires significant capital investment in advanced equipment and expertise. Only top-tier manufacturers like Yudi Optics boast such capabilities, enabling better cost control and project management for our clients.
Processing Case: Before & After Checked by Zygo Interferometer
High-Precision Shape Correction with MRF Polishing (1/32 RMS to 1/902 RMS, Microcrystalline)
—Initial Condition: The surface is an optical surface with a form error of 1/3 wave RMS.
—Final Condition: Form error reduced to 1/90 wave RMS.
—Process: Magnetorheological polishing.
—Processing Duration: For a 400mm diameter optical element, the process takes between 20 to 50 hours.
—Case Study: This typical case involves a microcrystalline material with a diameter of 422mm, shaped as a coaxial paraboloid. The initial surface accuracy was 0.3332 wave RMS, which was improved to 0.011 wave RMS. The total processing time was 25 hours, divided into three stages: the first stage took 15 hours, the second stage 5 hours, and the third stage 5 hours.
How to Benefit From MRF Polishing at Yudi
As the most advanced polishing technology available, magnetorheological polishing offers numerous advantages and exceptional processing strengths. However, this technology requires significant capital investment in advanced equipment and expertise. Only top-tier manufacturers can afford such capabilities. At YuDi, we leverage this cutting-edge technology to enhance quality and efficiency in optical processing, enabling better cost control and project management. By investing in state-of-the-art technology, YuDi ensures superior results and optimized processes for all your optical needs.
Precision polishing
It offers nanometer-level surface quality and high-precision surface shape.
Large aperture
no matter how large the blank is, MRF polishing will not affect its original size.
Many applicable materials
It can polish many optical materials to cover specific applications of clients.
Many applicable shapes
It can polish products with various surface shapes to achieve precise effect.
Cases of MRF Polishing in Precision Optics Processing
MRF Polishing on Aspheric optics
MRF Polishing on sapphire optics
MRF Polishing on freeform optics
MRF Polishing on Plane optics
Explore Our Other Polishing Technologies
To meet the diverse optical requirements, Yudi takes advantage of each polishing technology to offer a real all-in-one custom optic solution to clients whether it is simple or challenging.
We have a large range of continuous single-sided polishing rings available in different sizes to accommodate the polishing of substrates from 3mm to 1000mm. Moreover, skilled technicians with 30 years of experience can handle the most intricate optical design.
Leveraging CNC polishing technology, Yudi excels in rapid mass production while seamlessly integrating intricate designs, superior precision, and cost-effectiveness.It has been the most widely used in common optic production.
Yudi Intelligent Robotic Polisher is equipped with an intelligent system to automatically achieve high-precision polishing, significantly improving efficiency and achieving sub-micron-level surface accuracy for manufacturing more complex optics.
With non-contact Ion Beam polishing technology, Yudi can polish custom optics up to thousands of millimeters in diameter with high precision, low error, and no subsurface or edge defects. We reliably deliver high-end surface quality with nanoscale precision.