Effects of nanodiamond abrasive friability in experimental MR fluids with phosphate laser glass LHG-8 and other optical glasses

DeGroote, Jessica E.; Marino, Anne E.; Wilson, John P.; Spencer, Kathleen E.; Jacobs, Stephen D.

doi:10.1117/12.613959

Cited by 2 publications

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“…Machine tool manufacturers are continually improving tool path algorithms to reduce these errors while tool users make adjustments to reduce residual artifacts, for example by adjusting slurry mechanics and chemistry at the tool/surface interface where possible [2]. Additionally, a final randomized smoothing step may be necessary if a surface does not meet specifications directly after deterministic finishing [3].…”

Section: Surface Ripple Overviewmentioning

confidence: 99%

“…The propagation distance for this surface is approximately equal to the exit pupil distance, or 146mm. Solving equation 1 for the spatial scale length whose L f is 0.1 x the pupil distance yields: a = (L f x λ ) 1/2 = (0.1*146mm x λ ) 1/2 =(0.0096mm 2 ) 1/2 = 0.1mm (2) Hence, with this treatment a MSF error tolerance can be placed on the aspheric surface in the spatial period band from 0.1mm to 6.4mm (spatial frequencies from 0.156mm -1 to 10mm -1 . )…”

Section: Example: Msf Ripple Specification Derivation For An Asphericmentioning

confidence: 99%

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Specification and Control of Mid-Spatial Frequency Wavefront Errors in Optical Systems

Aikens¹,

DeGroote

Youngworth³

2008

Frontiers in Optics 2008/Laser Science XXIV/Plasmonics and Metamaterials/Optical Fabrication and Testing

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This paper is an introduction to the specification and tolerancing of Mid-spatial frequency (MSF) ripple or waviness. We begin with an introduction to the definition of ripple, spatial frequencies, and MSF ripple as a class of surface error (as opposed to figure or form, roughness, and surface imperfections or defects.) We then cover the derivation of spatial frequency bands of interest, specifications methods and notations, and relative amplitudes for typical manufacturing processes.

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Section: Surface Ripple Overviewmentioning

confidence: 99%

Section: Example: Msf Ripple Specification Derivation For An Asphericmentioning

confidence: 99%

Specification and Control of Mid-Spatial Frequency Wavefront Errors in Optical Systems

Aikens¹,

DeGroote

Youngworth³

2008

Frontiers in Optics 2008/Laser Science XXIV/Plasmonics and Metamaterials/Optical Fabrication and Testing

Self Cite

View full text Add to dashboard Cite

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Removal rate model for magnetorheological finishing of glass

et al. 2007

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Magnetorheological finishing (MRF) is a deterministic subaperture polishing process. The process uses a magnetorheological (MR) fluid that consists of micrometer-sized, spherical, magnetic carbonyl iron (CI) particles, nonmagnetic polishing abrasives, water, and stabilizers. Material removal occurs when the CI and nonmagnetic polishing abrasives shear material off the surface being polished. We introduce a new MRF material removal rate model for glass. This model contains terms for the near surface mechanical properties of glass, drag force, polishing abrasive size and concentration, chemical durability of the glass, MR fluid pH, and the glass composition. We introduce quantitative chemical predictors for the first time, to the best of our knowledge, into an MRF removal rate model. We validate individual terms in our model separately and then combine all of the terms to show the whole MRF material removal model compared with experimental data. All of our experimental data were obtained using nanodiamond MR fluids and a set of six optical glasses.

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Effects of nanodiamond abrasive friability in experimental MR fluids with phosphate laser glass LHG-8 and other optical glasses

Cited by 2 publications

References 0 publications

Specification and Control of Mid-Spatial Frequency Wavefront Errors in Optical Systems

Specification and Control of Mid-Spatial Frequency Wavefront Errors in Optical Systems

Removal rate model for magnetorheological finishing of glass

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