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light illumination

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Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1984
DOI: 10.31399/asm.tb.mpp.t67850267
EISBN: 978-1-62708-260-0
...-field illumination and ( b ) polarized-light illumination, 100×. (Courtesy of A. O. Benscoter, Bethlehem Steel Corp.) Figure 4-20 Example of color contrast developed by the use of a sensitive-tint plate and crossed-polarized light. The specimen is a Monel tube weld. The controlled rotation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.mgppis.t60400149
EISBN: 978-1-62708-258-7
...Abstract Abstract Several specialized instruments are available for the metallographer to use as tools to gather key information on the characteristics of the microstructure being analyzed. These include microscopes that use electrons as a source of illumination instead of light and x-ray...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780093
EISBN: 978-1-62708-268-6
... that may not otherwise be visible to the naked eye. The technique involves immersing the suspect component in a fluorescent liquid dye for several seconds, removing it, and then wiping the component clean. After a short time period, the component is then subjected to illumination with a black light...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.mgppis.t60400215
EISBN: 978-1-62708-258-7
... to reveal and enhance microstructural details. Modern metallurgical microscopes are equipped to operate with bright- and dark-field illumination, differential interference contrast (Nomarski), and polarized light. These procedures were discussed in Chapter 5 and are applied as methods to reveal various...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.mgppis.9781627082587
EISBN: 978-1-62708-258-7
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.mgppis.t60400109
EISBN: 978-1-62708-258-7
... optical microscopes. This term is not used in this book, because it is more appropriate to use the name of the source of the incident “beam” being used to illuminate the specimen. For example, a controlled beam of light is used in both the metallurgical and biological microscopes. Thus, they are called...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110042
EISBN: 978-1-62708-247-1
... below. The microscope in figure 1 is also equipped for transillumination as are the microscopes in figure 4 . In figure 1 the epi-illumination is coupled into the objective with a beam splitter. A beam splitter is a plane of glass that reflects some fraction of incident light, and passes the rest...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220039
EISBN: 978-1-62708-259-4
..., it is necessary to make sure that the camera lens “sees” the sample surface to be recorded under the same illumination. There basically are two lighting angles when macrographs are to be photographically recorded. This is illustrated in Fig. 4.14 . In the arrangement of Fig. 4.14(a) , the light reflected...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720161
EISBN: 978-1-62708-305-8
... Metallurgical microscopes differ from biological microscopes primarily in the manner by which the specimen is illuminated. Unlike biological microscopes, metallurgical microscopes must use reflected light. A simplified ray diagram for a metallurgical microscope is shown in Fig. 5 , while a typical inverted...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780035
EISBN: 978-1-62708-268-6
... examines how all of the aforementioned comes together to generate a fault-tree analysis. Consider a simple system failure analysis for the same situation covered in Chapter 4 —a system with a light bulb that screws into a socket, and the light bulb illuminates when the switch is moved to the “on” position...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720063
EISBN: 978-1-62708-305-8
... beams are also used in some special applications, such as triangulation systems for measuring distances. Polarized or ultraviolet light can also be used to reduce glare or to increase contrast. Proper Illumination Vidicon Camera Solid State Cameras The initial sensing operation performed...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780025
EISBN: 978-1-62708-268-6
... can ask the team to imagine themselves physically in the system and ask (from this new perspective) what may be causing the problem. For example, if a light bulb fails to illuminate, the brainstorming session members can mentally picture themselves in the light bulb interior and ask what could cause...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220069
EISBN: 978-1-62708-259-4
.... “ Nondestructive Testing—Metallographic Replica Techniques of Surface Examination ,” 3057, ISO, 1998 Among the various techniques used to characterize steel and cast iron microstructure, the most common is optical microscopy. In this technique, the sample is illuminated properly with visible light...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110545
EISBN: 978-1-62708-247-1
... and no illumination gives lock-in EL. Performing lock-in imaging with pulsed bias and illumination gives a thermal reflectance image. Combine pulses of current and light gives images in bright field, thermal and EL simultaneously. This versatile, noncontact characterization tool can help locate a broad range...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1984
DOI: 10.31399/asm.tb.mpp.9781627082600
EISBN: 978-1-62708-260-0
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720021
EISBN: 978-1-62708-305-8
... or in conjunction with eyeglasses Magnifying devices with built-in light sources Hand-Held Lenses Pocket Microscopes Self-Supporting Magnifiers Magnifying Devices Which are Eye Attachments Illuminated Magnifiers General Lighting Specific Lighting Devices Measuring devices...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110153
EISBN: 978-1-62708-247-1
... of the illuminated image taken from the backside of the die. To minimize diffuse light scattering (caused by scratches and irregularities at the surface of the die that deteriorate image quality) a mean surface roughness of less than 5 nm is recommended [10] . Even if the surface quality requirements are fulfilled...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1984
DOI: 10.31399/asm.tb.mpp.t67850165
EISBN: 978-1-62708-260-0
... illumination (left) and polarized light (right), 60 ×. Figure 3-74 Microstructure of an alloy of Zr and 3% Ag anodized with 5% KOH, 50×. (Courtesy of R. S. Crouse, Oak Ridge National Laboratory.) Figure 3-47 Examples of selective techniques applied to sulfide-aluminate inclusions...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2016
DOI: 10.31399/asm.tb.ascaam.t59190147
EISBN: 978-1-62708-296-9
... script Gray Gray-blue→gray, Fig. 4.3 Al 7 Cu 4 Ni γ CuNi Slightly branched plates Gray … Al 9 FeNi τ FeNi1 Large, slightly branched plates or polygons Gray Blue→pink, Fig. 4.3 Source: Ref 1 , 2 A light metallographic microscope provides several specimen illumination...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720085
EISBN: 978-1-62708-305-8
... testers for measuring the indentation must focus on both ends of the indentation at the same time, as well as be rigid and free from vibration. Lighting is also important. Complete specifications of measurement, including the mode of illumination, are necessary in microhardness testing techniques...