Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Steven R. Patterson"'
Publikováno v:
Precision Engineering. 60:535-543
High-performance freeform optical systems, designed for broad spectral imaging from the visible to the far infrared, place new demands on optical design, precision manufacturing, and precision metrology. To meet the tolerances on figure, roughness, a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c469d8a2b660ff2ee45f93600a325ffd
https://doi.org/10.1016/j.precisioneng.2019.09.011
https://doi.org/10.1016/j.precisioneng.2019.09.011
Publikováno v:
Review of Scientific Instruments. 74:2886-2893
This article theoretically and experimentally characterizes direct contact, packed bed thermal gradient attenuators in which a fluid control stream, subject to broadband thermal disturbances, flows through a thermally attenuating packed bed medium. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a5b102653a193fecda87c319c29fc318
https://doi.org/10.1063/1.1564279
https://doi.org/10.1063/1.1564279
Publikováno v:
Precision Engineering. 27:87-90
This technical note describes a novel method for forming external threads in Superinvar. Superinvar [Interferometric measurement of the dimensional stability of Superinvar, UCRL-53787, 1988] is a nickel–cobalt steel (64% Fe, 31% Ni, and 5% Co) with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::27213c025433fb848d30dc79432dee5a
https://doi.org/10.1016/s0141-6359(02)00187-3
https://doi.org/10.1016/s0141-6359(02)00187-3
Autor:
K.M. Lawton, Steven R. Patterson
Publikováno v:
Precision Engineering. 26:340-345
The relative stability of four glass–bead thermistors has been analyzed for 66 months to determine if thermistors have sufficient relative stability to be used as feedback sensors for milliKelvin levels of temperature control. This paper provides a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7a7c2af053e07fe5a8e458418da878cd
https://doi.org/10.1016/s0141-6359(02)00110-1
https://doi.org/10.1016/s0141-6359(02)00110-1
Publikováno v:
Journal of Heat Transfer. 123:796-802
A precision method for attenuating temperature variations in a high-throughput control fluid stream is described and analyzed. In contrast to earlier investigations, the present study emphasizes heat transfer analysis of the constituent control devic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0cd1219c76a3204c9d3aae967c76b123
https://doi.org/10.1115/1.1375810
https://doi.org/10.1115/1.1375810
Autor:
Steven R. Patterson, K.M. Lawton
Publikováno v:
Precision Engineering. 25:24-28
The relative stability of four glass-bead thermistors has been analyzed for 44 months to determine if thermistors have sufficient relative stability to be used as feedback sensors for milliKelvin levels of temperature control. The thermistors were me
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::57c647219b3e06eb61f0b124f70d2e04
https://doi.org/10.1016/s0141-6359(00)00051-9
https://doi.org/10.1016/s0141-6359(00)00051-9
Autor:
K.M. Lawton, Steven R. Patterson
Publikováno v:
Precision Engineering. 24:174-182
A multiloop control system has been implemented in a relatively large recirculating air chamber that maintains one-sigma air temperature stability of 3 mK at the outer loop control point. The control system is a modification to a chamber that formerl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f99d6b5fd699fd002905309c18eb865
https://doi.org/10.1016/s0141-6359(99)00043-4
https://doi.org/10.1016/s0141-6359(99)00043-4
Autor:
Steven R. Patterson, V.G. Badami
Publikováno v:
Precision Engineering. 24:41-49
This paper presents a method for the measurement of nonlinearity in heterodyne interferometry which utilizes the frequency spectrum of the output of the photodetector for the direct measurement of the magnitudes of the first and second harmonic nonli
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6e89b029e83ef94b405b5160df13fa4f
https://doi.org/10.1016/s0141-6359(99)00026-4
https://doi.org/10.1016/s0141-6359(99)00026-4
Publikováno v:
Review of Scientific Instruments. 68:3096-3098
Optical microscopy is an important measurement tool in many industries. This importance is primarily due to the ease-of-use and nondestructive characteristics of optical microscopes. Unfortunately, the far-field optics of conventional microscopes lim
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::29a1bf4565c741e24ca0be7762145949
https://doi.org/10.1063/1.1148248
https://doi.org/10.1063/1.1148248
Autor:
Brent C. Bergner, Christopher J. Evans, Steven R. Patterson, Matthew A. Davies, Rashmi R. Vohra
Publikováno v:
Lithographic and Micromachining Techniques for Optical Component Fabrication II.
The use of diamonds to generate precision patterns and precision surfaces on a micrometer or nanometer scale has a history that dates back centuries. Uses of diamond in semi-automated machinery can be traced to ruling machines, pantographs, and ornam
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f77cac98da06e19fee6e1a822c484745
https://doi.org/10.1117/12.506373
https://doi.org/10.1117/12.506373