Magnetorheological Finishing: A Review

Saraswathamma, K.

doi:10.14741/ijcet/spl.2.2014.30

Cited by 11 publications

(6 citation statements)

References 27 publications

(32 reference statements)

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“…2 Physikalisch-Technische Bundesanstalt (PTB), Abbestrasse 2-12, 10587 Berlin, Germany. 3 Regional Centre for Special Optics and Optoelectronic Systems (TOPTEC) Institute of Plasma Physics of the Czech Academy of Sciences, Za Slovankou 1782/3, 182 00 Praha 8, Czech Republic. 4 Mahr GmbH, Carl-Zeiss-Promenade 10, 07745 Jena, Germany.…”

Section: Fundingmentioning

confidence: 99%

“…These specifications distinguish this class of surfaces from othersfor example, from illumination-forming surfaces whose tolerances are much higher. Several high-accuracy techniques are applied to manufacture these optical surfaces, examples of which include ultra-precise diamond turning [2], magneto-rheological finishing [3], ion beam figuring [4] and other local polishing techniques [5]. Accurate manufacturing is impossible without accurate measurement for form control during the manufacturing process.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Round robin comparison study on the form measurement of optical freeform surfaces

Fortmeier¹,

Schachtschneider²,

Lédl³

et al. 2020

J. Eur. Opt. Soc.-Rapid Publ.

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A round robin comparison of freeform form measurements was carried out by the project partners and stakeholders of a European metrology research project. Altogether six measuring instruments were considered: five different (pointwise and areal) optical devices and one tactile device. Three optical freeform surfaces were used for the comparison measurements, where two specimens were measured by five instruments and one specimen by four instruments. In this paper, the evaluation methods and results of this round robin are presented for the three freeform surfaces made from a temperature-stable material, Super Invar ®. The freeforms had diameters of 40 mm, 50 mm and 100 mm and best-fit radii of 39.75 mm (convex), 40.9 mm (convex) and 423.5 mm (concave). For comparison, the bilateral pointwise differences between the available measurements were calculated. The root-mean-square values of these differences ranged from 15 nm to 110 nm (neglecting spherical contributions) and provided an insight into the status of typical freeform measurement capabilities for optical surfaces.

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Section: Fundingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Round robin comparison study on the form measurement of optical freeform surfaces

Fortmeier¹,

Schachtschneider²,

Lédl³

et al. 2020

J. Eur. Opt. Soc.-Rapid Publ.

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show abstract

“…58 MR fluid is now being used by a number of researchers working in the area of nanofinishing. [59][60][61][62][63] MR fluid basic constituents for the CMMRF method are shown in Figure 8. It is a smart substance that mixes a carrier liquid assist slurry with suitable additives/chemicals, magnetic particles and abrasives to form a versatile finishing brush that can work in a magnetic field.…”

Section: Magnetorheological Fluidmentioning

confidence: 99%

“…58 MR fluid is now being used by a number of researchers working in the area of nanofinishing. 59–63…”

Section: Magnetorheological Fluidmentioning

confidence: 99%

Chemomechanical magnetorheological finishing: Process mechanism, research trends, challenges and opportunities in surface finishing

Kumar

Singh

2021

Journal of Micromanufacturing

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Chemomechanical magnetorheological finishing (CMMRF) has emerged as a nanofinishing method that combines the characteristics of chemical mechanical polishing (CMP) and magneto-rheological finishing (MRF). The CMMRF process was designed to take into account both the chemical and mechanical effects that occur during the finishing process. In the field of material processing science, this article delves into the fundamentals of the CMMRF method. The potential research patterns linked to CMMRF are assessed and their benefits are determined. Furthermore, the challenges of improving CMMRF process capabilities, as well as the wide futuristic opportunities of the research sector, are emphasised, along with meeting all industrial needs. The findings of this analysis paper will also aid researchers in the field of advanced finishing in identifying process realisation for better results.

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“…The full-spatial-frequency surface of optical elements is requested in order to ensure the quality of output beam. There are several main polishing approaches for the optical elements: 1) traditional continuous polishing (CP) [4][5][6], 2) Computer Controlled Optical Surfacing (CCOS) [7,8], magnetorheological finishing (MRF) [9], and ion beam polishing (IBF) [10]. Mid-high frequency residuals and ripples caused by computer control polishing technique, will affect the imaging quality [11,12].…”

Section: Introductionmentioning

confidence: 99%

The real-time monitoring surface figure of optical elements in continuous polishing

Wei

et al. 2014

SPIE Proceedings

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Continuous ring polishing is the key process in large aperture optical elements. The surface figure of polishing pad is inferred by the offline testing surface figure of workpiece. The defects, low processing efficiency and uncertainty processing time in traditional continuous polishing, the real-time monitoring method of polishing is proposed. The realtime monitoring system is set up based on the computer, the dynamic interferometer, a beam expanding system and a beam reflecting system. There are a workpiece and a glass monitoring plate placing in same ring. The surface figure of workpiece, monitored by the monitoring plate, synchronize with the surface of glass monitoring plate in Peak-Valley (PV) and POWER. The new method with simple structure is fast measuring and judgmental directly to the changes of surface figures. The results of real-time monitoring and surface figure converging on the workpiece are valid for continuous polishing through experimental validation.

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Magnetorheological Finishing: A Review

Abstract: Surface quality is one of the most important properties of the precision devices. Poor

Cited by 11 publications

References 27 publications

Round robin comparison study on the form measurement of optical freeform surfaces

Round robin comparison study on the form measurement of optical freeform surfaces

Chemomechanical magnetorheological finishing: Process mechanism, research trends, challenges and opportunities in surface finishing

The real-time monitoring surface figure of optical elements in continuous polishing

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