Journal ArticleDOI
High‐temperature optical fiber thermometer
TLDR
In this article, a high-temperature optical fiber thermometer made from single crystal sapphire has been developed for use from 600 to approximately 2000 degrees C. The device consists of a small blackbody cavity which is sputtered on the end of a thin (0.25-1.25mm diameter, 0.05-0.30m length) spphire fiber, a connecting lowtemperature glass fiber, and a conventional optical detector.Abstract:
A high‐temperature optical fiber thermometer made from single crystal sapphire has been developed for use from 600 to approximately 2000 °C. The device consists of a small blackbody cavity which is sputtered on the end of a thin (0.25–1.25‐mm diameter, 0.05–0.30‐m length) sapphire fiber, a connecting low‐temperature glass fiber, and a conventional optical detector. The radiance from the cavity is used to measure its temperature. The present instrument is calibrated at a single temperature and uses the fundamental radiation laws to extrapolate to other temperatures. It is accurate and has a high sensitivity and rapid temporal response. There appear to be a number of applications of the device both in science and industry.read more
Citations
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Theory and design for mechanical measurements
TL;DR: In this article, Figliola and Beasley first discuss the basics of measurement, analogue and digital data acquisition systems and signal processing, the statistics of measurement and the analysis of error and uncertainty.
Journal ArticleDOI
Review of temperature measurement
TL;DR: In this article, a review of the general techniques available, as well as specific instruments for particular applications, is presented, based on the relative merits of different techniques, a guide for their selection is provided.
Journal ArticleDOI
Fiber Bragg grating sensors for harsh environments.
TL;DR: Because of their small size, passive nature, immunity to electromagnetic interference, and capability to directly measure physical parameters such as temperature and strain, fiber Bragg grating sensors have developed beyond a laboratory curiosity and are becoming a mainstream sensing technology.
Journal ArticleDOI
Laser-heated miniature pedestal growth apparatus for single-crystal optical fibers
TL;DR: In this article, a single-crystal fiber growth apparatus was designed and built using optical, mechanical, and electronic control systems that enable the growth of high optical quality singlecrystal fibers.
Journal ArticleDOI
Measurements of the melting point of graphite and the properties of liquid carbon (a review for 1963–2003)
TL;DR: In this paper, the melting temperature of graphite and its properties in melting is reviewed, beginning with the study by Bundy in 1963 and proceeding up to 2003. But the main divergence in the experimental results is in the value of the true melting temperature, which is in a range of 4000 or 5000 K. The history of carbon studies, starting in 1963, covering both laser and electrical heating of the graphite.
References
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Journal ArticleDOI
Ueber das Gesetz der Energieverteilung im Normalspectrum
TL;DR: In this article, a new set of Spekfralmessungen von O. Lummer, E. Pringsheim and E. Kurlbaum was gezeigt, das das zuerst von W. Wien aus molekularkinetischen Betrachtungen und spater von mir aus der Theorie der elektromagnetischen Strahlung abgeleitete Gesetz der Energieverteilung im Normalspektrum keine allgemeine G
Book
Temperature : its measurement and control in science and industry
TL;DR: In this article, the authors address thermodynamic temperature determinations temperature scales temperature fixed points resistance thermometry thermocouple thermometry radiation thermometry temperature control electronic thermometry calibration methods thermometry for special applications
Journal ArticleDOI
Temperature sensing in optical fibers using cladding and jacket loss effects
Milton Gottlieb,Gerald B. Brandt +1 more
TL;DR: A theoretical analysis is given of methods using transmission intensity effects in optical fibers as temperature sensors as well as the underlying mechanism involves temperature-dependent coupling of the evanescent field through a relatively thin cladding layer onto a lossy jacket.
Journal ArticleDOI
Fiber-optic temperature sensor based on internally generated thermal radiation.
Milton Gottlieb,Gerald B. Brandt +1 more
TL;DR: The purpose of this type of sensor is to monitor the development of hot spots in electrical machinery, such as generators and transformers, where conventional measurement techniques cannot be effectively applied.