Zobrazeno 1 - 10
of 23
pro vyhledávání: '"J. P. Dakin"'
Autor:
J. P. Dakin, T. J. Liddicoat
Publikováno v:
Measurement + Control, Vol 15 (1982)
A wavelength multiplexed optical shaft encoder using a single optical fibre as the transmission medium between the transducer and the read-out unit is described. A ten bit system has been constructed, giving 0.1% resolution over 360 of arc. It is bel
Externí odkaz:
https://doaj.org/article/95b0e69aac324aaab11fabfc54271510
Autor:
J. P. Dakin
Publikováno v:
Optoelectronics for Environmental Science ISBN: 9781468458978
The limited ability of the Earth to cope with the extremes of Man’s pollution has been receiving an increasing amount of political attention in recent years, with greatest media emphasis being on global effects, such as the “greenhouse” effect
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::105410ddad4d99a31825356e60441b81
https://doi.org/10.1007/978-1-4684-5895-4_3
https://doi.org/10.1007/978-1-4684-5895-4_3
Publikováno v:
Fibre Optics '86.
The paper reports initial experiments on two essentially complementary methods of coupling information, both into and from a continuous optical fibre highway, in each case in a non-invasive low-loss manner. Information is coupled onto the bus by mean
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ab500179ff86c1b00dd8900b9b4fca24
https://doi.org/10.1117/12.963589
https://doi.org/10.1117/12.963589
Autor:
J. P. Dakin, M. G. Holliday
Publikováno v:
SPIE Proceedings.
Serial time division multiplex (TDM) databuses,while very flexible, are limited at high data rates by the transit time between terminals. The pauses in transmission necessary to allow for propagation delays reduce the effective data rate, and may cau
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::32fbb32bb336acb576040684566087a0
https://doi.org/10.1117/12.946226
https://doi.org/10.1117/12.946226
Publikováno v:
SPIE Proceedings.
A novel optical time domain reflectometry technique is described which uses the Raman Spectrum of backscattered light to give the temperature distribution along a conventional optical fibre. Temperatures from 77K to 800K can be measured. Spatial reso
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::779d4e8539e4e45aa566bef30bb506d4
https://doi.org/10.1117/12.949798
https://doi.org/10.1117/12.949798
Publikováno v:
SPIE Proceedings.
OPERATION OF A COMPENSATED POLARIMETRIC SENSOR WITHSEMICONDUCTOR LIGHT SOURCEJ.P. DAKIN, S. BRODERICK, D.C. CARLESS, C.A. WADEPlessey Electronic Systems ResearchRoke Manor, Romsey, U.K.INTRODUCTIONThe conventional polarimetric sensor, first devised b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::93803fbe5b2f0c72c16067badc190c54
https://doi.org/10.1117/12.945091
https://doi.org/10.1117/12.945091
Publikováno v:
SPIE Proceedings.
This paper describes improvements to a novel fibre optic methane sensor which has several advantages over previously published fibre optic techniques. As with the earlier method, it is based on a scanning Fabry Perot etalon filter and is self-referen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c44348df42548806d6d5f112b1251255
https://doi.org/10.1117/12.947535
https://doi.org/10.1117/12.947535
Publikováno v:
SPIE Proceedings.
This paper describes a novel fibre optic methane sensor which has several advantages over previously published fibre optic techniques. It is based on a scanning Fabry Perot etalon filter and is self-referencing, requiring only a single optical sensin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::19f1dc7d843b41f6fc08c5c9465814d7
https://doi.org/10.1117/12.938026
https://doi.org/10.1117/12.938026
Publikováno v:
SPIE Proceedings.
A fibre optic displacement sensor based on tracking the minima in the frequency response of a dual-fibre optical link is described. The sensor is based on multimode fibre technology and uses a LED source, and is insensitive to attenuation changes in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::52713b2ea09f67797a6a00fc3c90f516
https://doi.org/10.1117/12.951171
https://doi.org/10.1117/12.951171
Publikováno v:
Optical Fiber Sensors.
A novel OTDR technique is described which uses the Raman spectrum of the backscattered light to give the temperature distribution along an optical fibre (Dakin, 1984).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e35084c845d0d395335da862f1963e1a
https://doi.org/10.1364/ofs.1985.pds3
https://doi.org/10.1364/ofs.1985.pds3