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optical pyrometers

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Published: 30 September 2014
Fig. 9 Typical optical pyrometer More
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005925
EISBN: 978-1-62708-166-5
... control systems, including contact sensors, noncontact sensors, controllers, energy-flow regulators, measurement instruments, and set-point programmers. Common contact sensors include temperature scales, thermocouples, and resistance temperature detectors, whereas optical pyrometers and on-line radiation...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005912
EISBN: 978-1-62708-167-2
... materials, namely, cost, temperature cycling, and the impact on the product. cladding glass induction furnaces optical fibers optical pyrometers susceptor material selection The use of induction heating in the processing of bulk glass ingots—optical fiber preforms—into optical fiber...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005920
EISBN: 978-1-62708-167-2
..., if needed. This allows temperature changes in the melting profile without having an operator present. One type of thermal measuring device is an optical pyrometer that is sited directly on the platinum surface through a hole placed in the ceramic backer located between two coils. If using a single-color...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005852
EISBN: 978-1-62708-167-2
... be used with an optical pyrometer to provide the feedback. If it is for an application such as bright annealing with a constantly clean surface it can work quite well. However, for most heat treating applications there can be viewing or emissivity issues and the preferred pyrometer may need several bands...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003239
EISBN: 978-1-62708-199-3
... inspection devices include bolometers, thermocouples, thermopiles, and meltable substances, whereas radiometers and pyrometers come under the noncontact category. contact thermographic inspection contact thermometric inspection noncontact thermographic inspection noncontact thermometric inspection...
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005924
EISBN: 978-1-62708-166-5
... temperature readings. Infrared pyrometers and fiber optics are most widely used for temperature measurement with induction. Infrared pyrometers are accurate to 0.5 to 1% of the reading. They can be used as portable sensors or as part of a permanent, continuous temperature-monitoring or -controlling system...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003159
EISBN: 978-1-62708-199-3
..., thermostatic strip, vessels and piping for storage and transportation of liquefied natural gas, superconducting systems in power transmissions, integrated-circuit lead frames, components for radios and other electronic devices, and structural components in optical and laser measuring systems. Iron-Nickel...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003442
EISBN: 978-1-62708-195-5
... of the specimen is controlled by a furnace or cryostat. The detector can be a calibrated thermocouple attached to the rear face of the specimen, an infrared sensor, or an optical pyrometer focused on the rear face and filter which is protected from the flash beam. To conduct the flash test, the source...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006465
EISBN: 978-1-62708-190-0
... photo detector Stratonics ThermaViz system Melt pool temperature Laser power Two-wavelength imaging pyrometer EB-PBF, electron beam powder bed fusion; L-PBF, laser powder bed fusion; DED, directed energy deposition. Source: Ref 25 Optical tomography (the reconstruction...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001099
EISBN: 978-1-62708-162-7
... of liquefied natural gas Superconducting systems in power transmissions Integrated-circuit lead frames Components for radios and other electronic devices Structural components in optical and laser measuring systems Low-expansion alloys are also used with high-expansion alloys (65%Fe-27%Ni-5...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001299
EISBN: 978-1-62708-170-2
..., and a means to record at least the front oxide face temperature during the heating cycle. Two-color infrared optical pyrometers are widely used for the latter task, with the output connected to a chart recorder or computer. One word of caution concerning the temperature measured. If the zirconia coating...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002360
EISBN: 978-1-62708-193-1
... are to ensure suitability of the test data and to calculate growth rates from the data. The article presents an analysis of the crack growth data. Optical, compliance, and electric potential difference are the most common laboratory techniques, and the article reviews their merits and limitations. Forced...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003317
EISBN: 978-1-62708-176-4
..., and equipment limitations. Various crack measurement techniques, including optical, ultrasonic, acoustic emission, electrical, and compliance methods, are also reviewed. The article discusses the two major aspects of FCGR test analysis: to ensure suitability of the test data and to calculate growth rates from...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003992
EISBN: 978-1-62708-185-6
... of forging stock be checked occasionally with an optical or probe-type pyrometer as the pieces are removed from the furnace. This practice not only provides a check on the accuracy of the furnace controls, but also ensures that the stock is reaching the furnace temperature. Control of Cooling Rate...
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005807
EISBN: 978-1-62708-165-8
... is to overheat unless the operator is equipped with didymium-tinted glasses. Radiation or optical pyrometers often are used to judge more accurately the temperatures being developed. Radiation-pyrometer systems of fast response are used extensively to control work temperatures and heating times. Metallurgical...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003199
EISBN: 978-1-62708-199-3
... Radiation sensors are noncontact-type temperature sensors used with radiation pyrometers. One type of radiation pyrometer is the optical pyrometer. Radiation sensors respond to radiant energy. They are classified as total-radiation (wide-band) or narrow-band types, depending on the width...
Series: ASM Handbook
Volume: 24A
Publisher: ASM International
Published: 30 June 2023
DOI: 10.31399/asm.hb.v24A.a0006954
EISBN: 978-1-62708-439-0
... applications in AM. These reviews also try to categorize and group similar applications or techniques. One primary classification is based on relative optical positioning of a camera with respect to the fabrication process. If a camera and associated optics are mounted at a fixed position relative...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006460
EISBN: 978-1-62708-190-0
...-array by numerical processing of an array of previously acquired laser-ultrasonic signals. The article describes the ultrasound generation by thermoelastic mechanism and ablation or vaporization. It illustrates the principle of optical detection of ultrasound with confocal Fabry-Perot interferometer...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006045
EISBN: 978-1-62708-175-7
... temperature of the compact was measured with a two-color optical pyrometer. Figure 15 shows an example of a compact of CP titanium powder CIPed into the approximate shape of a small in-line valve body ( Fig. 15b ) and subsequently sintered at 1200 °C (2200 °F) with a ramp rate of approximately 30 °C/min (54...