High-speed form preserving polishing of precision aspheres

Boerret, Rainer; Kelm, Andreas; Thieß, H.

doi:10.1117/12.733746

Cited by 3 publications

(1 citation statement)

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“…[5][6][7][8][9][10] Therefore, new production methods have been developed to satisfy these demands. 9,[11][12][13][14][15][16][17][18] Computer-controlled polishing is one of the latest developments in overcoming the disadvantages of conventional polishing, and not only enables the manufacture of complex surfaces but also achieves high quality results and an increase in production economics. 10, 19-24…”

Section: Introductionmentioning

confidence: 99%

Advanced techniques for computer-controlled polishing

et al. 2008

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Computer-controlled polishing has introduced determinism into the finishing of high-quality surfaces, for example those used as optical interfaces. Computer-controlled polishing may overcome many of the disadvantages of traditional polishing techniques. The polishing procedure is computed in terms of the surface error-profile and the material removal characteristic of the polishing tool, the influence function. Determinism and predictability not only enable more economical manufacture but also facilitate considerably increased processing accuracy. However, there are several disadvantages that serve to limit the capabilities of computer-controlled polishing, many of these are considered to be issues associated with determination of the influence function. Magnetorheological finishing has been investigated and various new techniques and approaches that dramatically enhance the potential as well as the economics of computer-controlled polishing have been developed and verified experimentally. Recent developments and advancements in computer-controlled polishing are discussed. The generic results of this research may be used in a wide variety of alternative applications in which controlled material removal is employed to achieve a desired surface specification, ranging from surface treatment processes in technical disciplines, to manipulation of biological surface textures in medical technologies.

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Section: Introductionmentioning

confidence: 99%

Advanced techniques for computer-controlled polishing

et al. 2008

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Simulation and analysis of the polishing process for aspheres

et al. 2009

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Frequency division combined machining method to improve polishing efficiency of continuous phase plate by bonnet polishing

et al. 2021

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Continuous phase plate (CPP), as a key diffractive optical element, is difficult to manufacture owing to its random and small features. In this paper, a novel frequency division combined machining (FDCM) method was proposed to improve polishing efficiency of CPP by optimizing the tool influence functions (TIFs) over targeted frequency bands. In addition, the convergence rate of power spectral density (CR-PSD) was proposed to evaluate the correct ability of TIF in different frequency bands, and to determine the division frequency for the combined processing. Through simulation verification, the combined processing with optimized TIFs by FDCM enabled high precision in less total time than that with single TIF processing. The experimental results verified that the method could imprint a 300 × 300 mm CPP with residual root-mean-square 24.7 nm after approximately 6-h bonnet polishing. Comparing the focal spots of designed and fabricated CPPs, the deviation of their energy concentration within 500 microns is only 0.22%. Hence, bonnet polishing using the FDCM is a new technical option for the production of large-aperture CPPs. Furthermore, the FDCM method shows a significant increase in efficiency, and it could be a generic method for CPP processing through other technologies, including magnetorheological and ion beam finishing.

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High-speed form preserving polishing of precision aspheres

Cited by 3 publications

References 0 publications

Advanced techniques for computer-controlled polishing

Advanced techniques for computer-controlled polishing

Simulation and analysis of the polishing process for aspheres

Frequency division combined machining method to improve polishing efficiency of continuous phase plate by bonnet polishing

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