Opto-Mechanical Systems Design, Two Volume Set

Yoder, Paul J.; Vukobratovich, Daniel

doi:10.1201/9781315217635

Cited by 12 publications

(16 citation statements)

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“…The window is then installed on a demountable Conflat viewport (VPD-1.19, Accu-Glass Products Inc.), with the bonded coverslip facing the atmospheric side [see Figure (b)]. The resulting viewport has a clear aperture of 30 mm, and the central bonded area has a vacuum safety factor of 10.…”

Section: Methodsmentioning

confidence: 99%

Optical Imaging and Tracking of Single Molecules in Ultrahigh Vacuum

et al. 2021

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Molecule-surface interaction is key to many physical and chemical processes at interfaces. Here, we show that the dynamics of single molecules on a surface under ultrahigh vacuum can be resolved using fluorescence imaging. By adapting oil-immersion microscopy to a thin vacuum window, we measure the adsorption, translational and rotational diffusion of single perylene molecules on a fused silica surface with high spatial and temporal resolution. Time-dependent measurements of the fluorescence signal allow us to deduce two characteristic decay time scales, which can be explained through a simplified model involving two adsorption states and five energy levels. The system presented in this work combines fluorescence imaging with essential ingredients for surface science and promises a platform for probing molecule-surface interactions in highly defined conditions.

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Section: Methodsmentioning

confidence: 99%

Optical Imaging and Tracking of Single Molecules in Ultrahigh Vacuum

et al. 2021

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“…While they were never used, the Hubble PM had 24 actuators to mitigate the risk of astigmatic G-release error. 41 The Webb PM has 18 actuators to mitigate the risk of segment-radius matching error and segment-level astigmatism.…”

Section: Primary Mirror Substrate Designmentioning

confidence: 99%

“…Multipoint metrology mount technology was developed with NASA funding in the 1970s for the Large Space Telescope Program (Hubble). [41][42][43] The Hubble PM's 7.6-μm self-weight deflection was characterized to an accuracy of 1.4 nm rms using a 135point metrology mount. 41,44,45 Regarding gravity orientation testing, two methods are the vertical face-up/face-down test 46 and the horizontal rotation testing.…”

Section: Primary Mirror Substrate Designmentioning

confidence: 99%

“…[41][42][43] The Hubble PM's 7.6-μm self-weight deflection was characterized to an accuracy of 1.4 nm rms using a 135point metrology mount. 41,44,45 Regarding gravity orientation testing, two methods are the vertical face-up/face-down test 46 and the horizontal rotation testing. 36,47,48 Typically, a multipoint mount or air bag is used for in-process metrology, and a multiorientation test is used for final metrology.…”

Section: Primary Mirror Substrate Designmentioning

confidence: 99%

“…A complete discussion of mirror design methodology can be found in Yoder and Vukobratovich. 41 The HabEx design team conducted multiple trade studies with literally hundreds of variations to optimize the stiffness, mass, and gravity sag of candidate open-back ZERODUR ® and closed-back ULE ® PMs. Design parameters traded included facesheet thickness, mirror thickness, core wall thickness, core pocket size, core geometry, and mount geometry (i.e., edge mount R ¼ 100% versus R ¼ 80% or 67%).…”

Section: Primary Mirror Substrate Designmentioning

confidence: 99%

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Habitable-Zone Exoplanet Observatory baseline 4-m telescope: systems-engineering design process and predicted structural thermal optical performance

Stahl

Kuan

Arnold

et al. 2020

J. Astron. Telesc. Instrum. Syst.

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The Habitable-Zone Exoplanet Observatory Mission (HabEx) is one of four large missions under review for the 2020 astrophysics decadal survey. Its goal is to directly image and spectroscopically characterize planetary systems in the habitable zone around nearby Sun-like stars. In addition, HabEx will perform a broad range of general astrophysics science enabled by a 115-to 1700-nm spectral range and 3 × 3 arcminute field of view. Critical to achieving its science goals, HabEx requires a large, ultrastable UV/optical/near-IR telescope. Using sciencedriven systems engineering, HabEx specified its baseline telescope to be a 4-m off-axis, unobscured three-mirror anastigmatic architecture with diffraction-limited performance at 400 nm, and wavefront stability on the order of a few tens of picometers. We summarize the systems-engineering approach to the baseline telescope assembly's optomechanical design, including a discussion of how science requirements drive the telescope's specifications. We also present structural thermal optical performance analysis showing that the baseline telescope structure meets its specified tolerances. We report new and updated analysis that is not in the HabEx final report. © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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High-Pressure Equipment for Use in the Laboratory, at Sea and at Depth

Macdonald

2021

Life at High Pressure

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Opto-Mechanical Systems Design, Two Volume Set

Cited by 12 publications

References 0 publications

Optical Imaging and Tracking of Single Molecules in Ultrahigh Vacuum

Optical Imaging and Tracking of Single Molecules in Ultrahigh Vacuum

Habitable-Zone Exoplanet Observatory baseline 4-m telescope: systems-engineering design process and predicted structural thermal optical performance

High-Pressure Equipment for Use in the Laboratory, at Sea and at Depth

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