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Simpler, Faster, and Softer : = Towards Broad Application of Laser Speckle Imaging in Art Conservation and Soft Matter.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Simpler, Faster, and Softer :/
Reminder of title:	Towards Broad Application of Laser Speckle Imaging in Art Conservation and Soft Matter.
Author:	Buijs, J. Jesse.
Description:	1 online resource (202 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 84-02, Section: B.
Contained By:	Dissertations Abstracts International84-02B.
Subject:	Ophthalmology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29237277click for full text (PQDT)
ISBN:	9798841565604

Simpler, Faster, and Softer : = Towards Broad Application of Laser Speckle Imaging in Art Conservation and Soft Matter.
Buijs, J. Jesse.

Simpler, Faster, and Softer :Towards Broad Application of Laser Speckle Imaging in Art Conservation and Soft Matter. - 1 online resource (202 pages)

Source: Dissertations Abstracts International, Volume: 84-02, Section: B.

Thesis (Ph.D.)--Wageningen University and Research, 2022.

Includes bibliographical references

"America produced not only scientists and engineers capable of shaping the destiny of our age, but also artists worthy to keep them company." The development of spaceflight was undoubtedly a technical and scientific breakthrough in its own right. However, NASA understood very well that much was to gain from inspiring the general public. Therefore they invited artists to their facilities to paint 'whatever interested them'. This resulted in an extraordinary collection and the aforementioned quote. The title of this thesis is loosely inspired by the name of one of the paintings from this collection: 'Higher, faster, and farther' painted by Dong Kingman which is shown in figure 1.1. The painting shows the Saturn I rocket on the launch-pad. This rocket could fly higher and faster, and it took the space program one step farther away from Earth. 1 The goal of the space program was to explore the biggest object that we know: space. Contrary, our research is aimed at exploring the small scale: visualizing nano-metric motions inside materials. We explore and improve on a medical imaging technique, Laser Speckle Imaging (LSI), 2 which in essence is a very sensitive motion detector. We make the machine simpler, the data analysis faster, and show how to detect motion in softer materials. This all in an effort to make the technique broadly applicable. We will explore application in two fields: art conservation and soft matter as examples of what LSI could achieve in other fields.1.1 Ultra-sensitive motion detectionLSI is an extremely sensitive motion detection technique because it uses the principle of interference of light. This principle was already used in 1887, in what has grown to be the most famous negative result experiment: the Michelson-Morley aether experiment. Scientists at that time believed that light-waves had to move through a medium, the so called aether. To prove the existence of the aether, Michelson and Morley built an interferometer (fig. 1.2a), which could measure changes in the speed of light as a result of 'aether wind'. A beam of light was split in two, sent in two perpendicular directions, reflected and recombined. Combining two light beams from the same source gives rise to an interference pattern. If the two paths are equally long, the light-waves will arrive in phase and have constructive interference (fig. 1.2b). If not, there will be destructive interference, dissipating a part or all of the original light intensity (fig. 1.2c). This shift in phase only needs to be a fraction of the wavelength to observe partly destructive interference. Since the wavelength of visible light is in the range of 380 to 750 nanometers, an interferometer can easily be used to detect nanometer shifts. In the case of the aether experiment the whole setup was rotated with the idea that a change in the aether wind direction would alter the arrival times of each of the two light beams and change the interference pattern. However, no significant change was observed, leading to the conclusion that if the aether existed, the speed at least was insignificant compared to the speed of light.3,4.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798841565604Subjects--Topical Terms:

862704
Ophthalmology.
Index Terms--Genre/Form:

542853
Electronic books.

Simpler, Faster, and Softer : = Towards Broad Application of Laser Speckle Imaging in Art Conservation and Soft Matter.
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502 $a Thesis (Ph.D.)--Wageningen University and Research, 2022.
504 $a Includes bibliographical references
520 $a "America produced not only scientists and engineers capable of shaping the destiny of our age, but also artists worthy to keep them company." The development of spaceflight was undoubtedly a technical and scientific breakthrough in its own right. However, NASA understood very well that much was to gain from inspiring the general public. Therefore they invited artists to their facilities to paint 'whatever interested them'. This resulted in an extraordinary collection and the aforementioned quote. The title of this thesis is loosely inspired by the name of one of the paintings from this collection: 'Higher, faster, and farther' painted by Dong Kingman which is shown in figure 1.1. The painting shows the Saturn I rocket on the launch-pad. This rocket could fly higher and faster, and it took the space program one step farther away from Earth. 1 The goal of the space program was to explore the biggest object that we know: space. Contrary, our research is aimed at exploring the small scale: visualizing nano-metric motions inside materials. We explore and improve on a medical imaging technique, Laser Speckle Imaging (LSI), 2 which in essence is a very sensitive motion detector. We make the machine simpler, the data analysis faster, and show how to detect motion in softer materials. This all in an effort to make the technique broadly applicable. We will explore application in two fields: art conservation and soft matter as examples of what LSI could achieve in other fields.1.1 Ultra-sensitive motion detectionLSI is an extremely sensitive motion detection technique because it uses the principle of interference of light. This principle was already used in 1887, in what has grown to be the most famous negative result experiment: the Michelson-Morley aether experiment. Scientists at that time believed that light-waves had to move through a medium, the so called aether. To prove the existence of the aether, Michelson and Morley built an interferometer (fig. 1.2a), which could measure changes in the speed of light as a result of 'aether wind'. A beam of light was split in two, sent in two perpendicular directions, reflected and recombined. Combining two light beams from the same source gives rise to an interference pattern. If the two paths are equally long, the light-waves will arrive in phase and have constructive interference (fig. 1.2b). If not, there will be destructive interference, dissipating a part or all of the original light intensity (fig. 1.2c). This shift in phase only needs to be a fraction of the wavelength to observe partly destructive interference. Since the wavelength of visible light is in the range of 380 to 750 nanometers, an interferometer can easily be used to detect nanometer shifts. In the case of the aether experiment the whole setup was rotated with the idea that a change in the aether wind direction would alter the arrival times of each of the two light beams and change the interference pattern. However, no significant change was observed, leading to the conclusion that if the aether existed, the speed at least was insignificant compared to the speed of light.3,4.
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