Deterministic polishing from theory to practice

Hooper, Abigail R.; Hoffmann, Nathan N.; Sarkas, H. W.; Escolas, John; Hobbs, Zachary

doi:10.1117/12.2196055

Cited by 1 publication

(3 citation statements)

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“…Polishing using the Zeeko polisher has proven very effective on flat optics, and the ability to perform freeform surface machining can provide prescription accuracy [7,9,10]. However, much development is necessary to perform is comparable precision on cylindrically-shaped optics.…”

Section: Premise Of Lateral Deterministic Polishingmentioning

confidence: 99%

“…However, in a deterministic polishing routine, the exact effect of polishing parameters on the shape of the wear pattern is paramount. A single measurement of the wear pattern with a specific set of parameters can be used to create a deterministic fit, but a more thorough knowledge of various combinations of polishing parameters will create an ability to remove more error [7,9,10].…”

Section: Prediction Characteristics: Polishing Parametersmentioning

confidence: 99%

“…As discussed in this paper, deterministic polishing of the mandrel is a viable method to reduce error in the electroformed nickel shells. Investigating improvements to each step of the electrodeposition process, along with other methods of manufacturing, MSFC is moving toward high-resolution, high-collecting area, full-shell, grazing-incidence optics [4,5,7].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Deterministic polishing of replicating grazing-incidence mandrels

Davis

Champey

Kolodziejczak

et al. 2019

Optics for EUV, X-Ray, and Gamma-Ray Astronomy IX

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In an effort to manufacture high-angular-resolution, grazing-incidence, x-ray optics, Marshall Space Flight Center (MSFC) is taking measures to improve its electroformed replicated optics. A key development is the use of computer-numerical control (CNC) polishing to deterministically improve the surface of electroless nickel mandrels used to replicate grazingincidence optics. Metrology, control software and polishing parameters must function together seamlessly to reach the specifications required to replicate sub-arcsecond optics. Each change in polishing parameters effects the wear pattern of the polishing head. Using Richardson-Lucy deconvolution, the controller software fits the wear pattern to metrology data to calculate the changing feedrates across the mandrel. Here we present an overview of our process, and early results showing the effectiveness of deterministic polishing for replicated optics.

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Section: Premise Of Lateral Deterministic Polishingmentioning

confidence: 99%

Section: Prediction Characteristics: Polishing Parametersmentioning

confidence: 99%