Fibre optics optical

For example, an 11-month-old sensor based on 50 mol% octyl-triEOS exhibits more than fourfold greater sensitivity in comparison to an equivalent sensor based on pure TEOS (Figure 6.7). Over an 11-month time period, the sensitivity of a pure TEOS-based sensor drops by more than 400%, whereas a sensor based on 50 mol% octyl-triEOS remains stable (relative standard deviation ca. 4%). Integrated in fibre optics, optical sensors based on these materials are commercialized by the US... [Pg.149]

BE-1432 Fibre optic strain monitoring at elevated temperatures RoH Ouatavaaon Vattenfall AB... [Pg.935]

BE-7S67 Fibre optics for remote monitoring of structural integrity of elevated temperature insulated systems (FORMS) Mr. Manuel Gomea Eitrada Nacional... [Pg.935]

Tsai D P, Othonos A, Moskovits M and Uttamchandani D 1994 Raman spectroscopy using a fibre optic probe with subwavelength aperture Appl. Phys. Lett. 64 1768... [Pg.1730]

Figure Bl.20.5. A selection of common SFA designs SFA Mk I [ ], SFA Mk II [M], SFA Mk III [M], SFA Mk IV [ ], capacitive SFA [H], fibre-optic SFA [43], Figures reproduced with pennission from indicated references.

Quaternary Ga In j.As jPj, grown on InP is of major importance to fibre-optic communications. In quaternary compounds, both the gap and the lattice constant can be tailored by changing the chemical composition. In thick layers, in order to avoid the generation of strain-induced defects, care must be taken in adjusting the ratio of x and v to maintain the lattice-matched composition x = 2.2v. The available gaps range from 1.34 eV in InP to -0.75 eV in... [Pg.2880]

Kotte. E.-U. et al. (1989) Technologies of Light Lasers. Fibres. Optical Information Proce.ssing, Early Monitoring of Technological Change (Springer, Berlin). [Pg.301]

OT1442 A fibre optic sensor for flexible pipeline and riser integrity momtonng... [Pg.583]

Telephone cable Pneumatic Optical fibre Optical - infrared Radio... [Pg.329]

Sundar VC, Yablon AD, Grazul JL et al (2003) Fibre-optical features of a glass sponge -some superior technological secrets have come to light from a deep- sea organism. Nature 424 899-900... [Pg.160]

Advanced computerisation and sensorisation and developments in the field of multielement optical detectors (CCD and PDA) and fibre optic remote spectroscopy have added modularity and flexibility. Silica-silica fibres used for spectroscopy applications are multimode with core diameters from 50 to 1000 p,m. The application of new technologies to optical instrumentation (e.g. improved gratings in spectrographs, the use of... [Pg.301]

The scope of UV analysis of dissolved polymer/additive matrices is thus quite restricted and mainly limited to special cases in which the additive package is known, e.g. the determination of Irganox 1098 in GFR-PA4.6 after dissolution in H2SO4/HNO3. Fibre-optic dissolution analysis by means of a UV diode array spectrometer is well known. In comparison to IR spectroscopy, UV spectrophotometry is better equipped to provide quantitative data. [Pg.696]

Butler MA, Ricco AJ. 1992. Fibre-optic micro-mirror studies of the interaction of thin copper films with an organophosphonate. Anal Chem 64(17) 1851-1854. [Pg.146]

A variety of optical systems have been described which use optical fibres to perform remote Raman spectroscopic analyses. These are of particular value when the sample has to be observed under hostile or hazardous environmental conditions, such as the in-line monitoring of chemical production. The collection radius of such fibre-optic probes is of the order 100 pm. [Pg.52]

Raman microscopy has the ability to investigate regions down to 1 pm, and, by the aid of fibre optics, remote sampling is possible. The molecular information... [Pg.203]

There are dampers bottom and top of this cladding cavity to promote natural ventilation. A few integrated photo-voltaic panels are sufficient to power the fans (twelve V2-HP motors) that assist ventilation through the double skin. There are tracks within the double skin that assist in the cleaning of surfaces 2 and 3. There is also a grid of fibre optic lights that blink periodically and change colour. [Pg.128]

The latter applies to NIR spectroscopy used for the non-invasive determination of blood glucose by means of a fibre-optical measuring-head (Jagemann et al. [1995] Muller et al. [1997] Danzer et al. [1998]). In addition to the weak overtone and combination bands resulting from glucose, strongly disturbing absorption of water, that is the main component... [Pg.196]

Lippitsch M.E., Pusterhofer J., Leiner M.J.P., Wolfbeis O.S., Fibre optic oxygen sensor with the fluorescence decay time as information carrier. Anal. Chim. Acta 1988 205 1. [Pg.41]

The signal conversion, occurring in the fibre optic chemical sensors (FOCS), proceeds in several steps, which are shown in Figure 1. [Pg.47]

Figure 1. Signal conversion in fibre optic chemical sensor. 47...

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