Control of Mid-spatial-frequency Errors for Large Steep Aspheric Surfaces

Kim, Dae Wook; Martin, Hubert M.; Burge, James H.

doi:10.1364/oft.2012.om4d.1

Cited by 10 publications

(5 citation statements)

References 9 publications

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“…This resembles a big challenge for the manufacturing process of precision optics. The demand for tools, techniques and strategies to avoid the MSFE is increasing [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Mid-spatial frequency error generation mechanisms and prevention strategies for the grinding process

Pohl

Kukso

Boerret

et al. 2020

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

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The research presented in this paper is focused on the link between manufacturing parameters and the resulting mid-spatial frequency error in the manufacturing process of precision optics. The goal is to understand the generation mechanisms of mid-spatial frequency errors and avoid their appearance in the manufacturing process. Also, a simulation which is able to predict the resulting mid-spatial frequency error from a manufacturing process is developed and verified.

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“…This resembles a big challenge for the manufacturing process of precision optics. The demand for tools, techniques and strategies to avoid the MSFE is increasing [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Mid-spatial frequency error generation mechanisms and prevention strategies for the grinding process

Pohl

Kukso

Boerret

et al. 2020

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

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“…Because the intrinsic tool motion induces this on the unit under fabrication, all traditional large optics suffer from those errors. Many research groups, including our group, have been investigating those errors [10][11][12][13]. In order to control mid-to-high frequency, recognition of the error is an essential step, but this is a challenging metrology goal due to the large required measurable range of the testing instrument.…”

Section: The Mid-to-high Frequency Error In the Optical Systemmentioning

confidence: 99%

Mid-to-high frequency characterization of inflatable membrane optics

Choi

Palisoc

Pandde

et al. 2021

Astronomical Optics: Design, Manufacture, and Test of Space and Ground Systems III

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Inflatable membrane primary optics for space telescopes are a smart approach in the context of saving flight payload weight and volume. The Orbiting Astronomical Satellite for Investigating Stellar systems (OASIS) adopted the membrane architecture for primary optics (primary antenna, A1) to have 20 meter diameter collection area with operation bands at the terahertz frequency. The membrane is made of Kapton or Mylar film with an aluminized surface, and the balloon (transparent surface + aluminized surface) is inflated to work as the convex mirror. In order to leverage the carrying volume advantage of inflatable optics, it must be folded during launch and deployed in orbit. The thin membrane film can crumple easily when it is folded, and it should be ironed out when the telescope is deployed for observation.We studied the microroughness and mid-to-high spatial frequency characteristics of the membrane via optical metrology to evaluate the surface properties. Because it is not of traditional shape and material, it is impossible to test with an offthe-shelf interferometer and profilometer. Moreover, the defect spatial frequency of interest is a few hundred microns to millimeters range, so the measurable field and dynamic range need to be in range of a few centimeters with microns resolution. To meet those requirements for metrology, we developed a flexible optics testbed utilizing deflectometry. The microroughness and mid-to-high frequency properties are measured with a white light interferometer and proposed methodology. The test results show that the candidate membrane is suitable for OASIS and this reliable test will guide the further design study of A1 assembly and optical system error budget.

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“…Stressed-lap polishing with a diameter of 1 m was developed. After polishing, full surface roughness and form accuracy reached 20 nm Ra and less than 1 μm, respectively [162] The second principle of bonnet polishing is to use a kind of motion called 'precession,' which is different from the 'rotation' and 'translation' of a traditional polishing tool [164][165][166]. The precession motion is divided into two parts:…”

Section: Stressed-lap Polishingmentioning

confidence: 99%

Manufacturing technologies toward extreme precision

Zhang

Yan

Kuriyagawa

2019

Int. J. Extrem. Manuf.

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Precision is one of the most important aspects of manufacturing. High precision creates high quality, high performance, exchangeability, reliability, and added value for industrial products. Over the past decades, remarkable advances have been achieved in the area of high-precision manufacturing technologies, where the form accuracy approaches the nanometer level and surface roughness the atomic level. These extremely high precision manufacturing technologies enable the development of high-performance optical elements, semiconductor substrates, biomedical parts, and so on, thereby enhancing the ability of human beings to explore the macro- and microscopic mysteries and potentialities of the natural world. In this paper, state-of-the-art high-precision material removal manufacturing technologies, especially ultraprecision cutting, grinding, deterministic form correction polishing, and supersmooth polishing, are reviewed and compared with insights into their principles, methodologies, and applications. The key issues in extreme precision manufacturing that should be considered for future R&D are discussed.

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Control of Mid-spatial-frequency Errors for Large Steep Aspheric Surfaces

Cited by 10 publications

References 9 publications

Mid-spatial frequency error generation mechanisms and prevention strategies for the grinding process

Mid-spatial frequency error generation mechanisms and prevention strategies for the grinding process

Mid-to-high frequency characterization of inflatable membrane optics

Manufacturing technologies toward extreme precision

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