By Franz Mayinger
ISBN-10: 3642564437
ISBN-13: 9783642564437
ISBN-10: 3642630790
ISBN-13: 9783642630798
This ebook offers an creation to an important optical size thoughts which are utilized to engineering difficulties. it's going to additionally function a tenet to choosing and utilizing the suitable strategy to a specific challenge. The textual content of the 1st version has been thoroughly revised and new chapters extra to explain the newest advancements in Phase-Doppler Velocimetry and Particle photo Velocimetry. The editors and authors have made a distinct attempt not just to explain and to give an explanation for the basics of measuring options, but additionally to supply directions for his or her program and to illustrate the services of many of the equipment. The publication comes with a CD-ROM containing high-speed videos visualizing the equipment defined within the book.
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Extra resources for Optical Measurements: Techniques and Applications
Example text
Optical Measurements © Springer-Verlag Berlin Heidelberg 2001 18 F. Mayinger the ability of the method to record the totality (holos) of the light information as regards the wave-front, namely the amplitude (as brightness), the wavelength (as color) and the phase position of the light. Using these possibilities, completely new interference methods can be developed. Holography demands, however, a source which emits coherent light. Therefore, holography, as invented in 1949 by Gabor, could not be used until the laser had been developed ten years later.
This figure demonstrates the temperature field around a burning flame. Depending on the orientation of the parallel fringes, the distortion varies. To get most informative pattern, the parallel fringes should be orientated in the direction of the largest temperature gradients. In Fig. 15 the interferogram a) presents an infinite fringe pattern, whilst the interferograms b) - d) are of finite fringe nature with vertical, diagonal and horizontal orientation of the parallel fringe pattern. Analyzing non planar temperature fields, like the above mentioned boundary layer around a condensing bubble, also with the finite fringe method the before mentioned Abel-correction has to be applied, which was described in detail by Hauff and Grigull [21].
5. Temperature field in a liquid layer heated at the bottom. Parallel object beam used for recording the interferogram As seen, the interference fringes cannot be well distinguished from each other in the immediate neighborhood of the wall and the resolution is not high enough to evaluate the heat transfer coefficient. In a second experiment with the same test section a wave-front was used with an optical arrangement as shown in Fig. 2. With this arrangement, however, it was only possible to record a sector of the test section.
Optical Measurements: Techniques and Applications by Franz Mayinger
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