Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Michael North-Morris"'
Autor:
Marcel Bluth, Perry Greenfield, James C. Wyant, Sang Park, Michael North-Morris, Babak Saif, Ritva A. M. Keski-Kuha, Lee Feinberg
Publikováno v:
UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts IX.
During the testing of the primary mirror segments for JWST, our team realized that some of the tools and techniques we had developed could be pushed further to achieve picometer resolution.We began developing incremental techniques for measuring, con
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::23e5758165e19a34d86cddf3670b3a45
https://doi.org/10.1117/12.2543034
https://doi.org/10.1117/12.2543034
Autor:
Perry Greenfield, Michael North-Morris, James C. Wyant, Marcel Bluth, Ritva A. M. Keski-Kuha, Lee Feinberg, Babak Saif
Publikováno v:
Applied optics. 58(12)
Future space observatory missions are forecasting the need for sensing and controlling wavefront error and system alignment stability to picometer scale. Picometer stability performance demands precision knowledge of the mirror and metering structure
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::371d03bae580ff96ef744fbdebc05ce2
https://pubmed.ncbi.nlm.nih.gov/31044790
https://pubmed.ncbi.nlm.nih.gov/31044790
Autor:
James C. Wyant, Neal Brock, Michael North-Morris, Brad Kimbrough, James E. Millerd, John R. Hayes
Publikováno v:
International Conference on Space Optics — ICSO 2006.
The largest limitation of phase-shifting interferometry for optical testing is the sensitivity to the environment, both vibration and air turbulence. An interferometer using temporal phase-shifting is very sensitive to vibration because the various p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::06ee6bf4a722958156cc88ad7cbfd084
https://doi.org/10.1117/12.2308094
https://doi.org/10.1117/12.2308094
Autor:
David Chaney, Koby Smith, Josh Bluth, Ritva A. M. Keski-Kuha, Michael North-Morris, Perry Greenfield, Kyle Van Gorkom, Babak Saif, James C. Wyant, Lee Feinberg, Marcel Bluth
Publikováno v:
Applied optics. 56(23)
A high-speed interferometer has been designed and built to measure the dynamics of the James Webb Space Telescope primary mirror system currently under testing. This interferometer is capable of tracking large absolute motion (i.e., piston) of the mi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5d125412f2a75bda7fa73addb4271b51
https://pubmed.ncbi.nlm.nih.gov/29047935
https://pubmed.ncbi.nlm.nih.gov/29047935
Autor:
Michael North-Morris, James E. Millerd
Publikováno v:
Optical Measurement Systems for Industrial Inspection X.
Over the last two decades the use of single-frame interferometric techniques, known as Dynamic Interferometry, has become widely available in commercial interferometer systems and they have been used extensively in the production of state-of-the-art
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8354a5455cddb278965722d1d81a15aa
https://doi.org/10.1117/12.2276582
https://doi.org/10.1117/12.2276582
Publikováno v:
SPIE Proceedings.
A method for reducing the coherent noise, by a factor of two, in dynamic interferometry measurements is presented. Reducing coherent noise is particularly important in "on-machine" metrology applications where residual noise can be polished into the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d3ce9f856c3aabbd4fd3582caa4699de
https://doi.org/10.1117/12.860450
https://doi.org/10.1117/12.860450
Autor:
Michael North Morris
Publikováno v:
Frontiers in Optics 2010/Laser Science XXVI.
A compact, vibration insensitive interferometer design that is well suited for measuring optics while mounted in situ on polishing equipment is presented. The system employs a single-frame-phase sensor that permits acquisition in tens of microseconds
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3cec89951265481bbe064e15690eda7c
https://doi.org/10.1364/fio.2010.stua3
https://doi.org/10.1364/fio.2010.stua3
Publikováno v:
SPIE Proceedings.
We present a dual mode interferometer system based on a single-frame phase acquisition sensor that is capable of measuring the dynamic displacement of both specular and diffuse components. The single frame acquisition allows the interferometer to fre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4ab61b1b9dde79dd2e6dc0cf1c1b4e7e
https://doi.org/10.1117/12.827090
https://doi.org/10.1117/12.827090
Autor:
Peter Blake, Michael North-Morris, Babak Saif, Warren Hack, Perry Greenfield, Bente Eegholm, Marcel Bluth, Ritva A. M. Keski-Kuha
Publikováno v:
Applied optics. 46(23)
We present a method for the calibration of a spatially phase-shifted digital speckle pattern interferometer (SPS-DSPI), which was designed and built for the purpose of testing the James Webb space telescope (JWST) optical structures and related techn
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::12d2e3265cf825f9639432803f239ba7
https://pubmed.ncbi.nlm.nih.gov/17694108
https://pubmed.ncbi.nlm.nih.gov/17694108
Autor:
James Sanders, Ritva A. M. Keski-Kuha, Michael North-Morris, Lee Feinberg, Austin Van Otten, David Chaney, Warren Hack, James E. Millerd, Marcel Bluth, Josh Bluth, W. Scott Smith, Perry Greenfield, Babak Saif
Publikováno v:
Applied Optics. 54:4285
The James Webb Space Telescope (JWST) Optical Telescope Element is a three mirror anastigmat consisting of a 6.5 m segmented primary mirror (PM), a secondary mirror, and a tertiary mirror. The primary mirror comprises 18 individual hexagonal segments
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c57fc5cde153b2b14514031684e418ba
https://doi.org/10.1364/ao.54.004285
https://doi.org/10.1364/ao.54.004285