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Stretchable and Tunable Optical Syst...

Li, Zhengwei.

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Stretchable and Tunable Optical Systems Based on Surface Morphologies.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Stretchable and Tunable Optical Systems Based on Surface Morphologies./
Author:	Li, Zhengwei.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2017,
Description:	126 p.
Notes:	Source: Dissertation Abstracts International, Volume: 78-10(E), Section: B.
Contained By:	Dissertation Abstracts International78-10B(E).
Subject:	Mechanical engineering. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10239293
ISBN:	9781369784336

Stretchable and Tunable Optical Systems Based on Surface Morphologies.
Li, Zhengwei.

Stretchable and Tunable Optical Systems Based on Surface Morphologies. - Ann Arbor : ProQuest Dissertations & Theses, 2017 - 126 p.

Source: Dissertation Abstracts International, Volume: 78-10(E), Section: B.

Thesis (Ph.D.)--University of Colorado at Boulder, 2017.

Technology advances increasingly require optical systems to be stretchable and tunable. Recently, surface morphologies-based optical systems have emerged as an exciting research area. In this dissertation, we developed several stretchable and tunable optical systems based on surface morphologies with potential applications in bioinspired imaging sensor, smart window, optical grating and optical diffuser.

ISBN: 9781369784336Subjects--Topical Terms:

649730
Mechanical engineering.

Stretchable and Tunable Optical Systems Based on Surface Morphologies.
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035 $a (MiAaPQ)AAI10239293
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035 $a AAI10239293
040 $a MiAaPQ $c MiAaPQ
100 1 $a Li, Zhengwei. $3 3342009
245 1 0 $a Stretchable and Tunable Optical Systems Based on Surface Morphologies.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2017
300 $a 126 p.
500 $a Source: Dissertation Abstracts International, Volume: 78-10(E), Section: B.
500 $a Adviser: Jianliang Xiao.
502 $a Thesis (Ph.D.)--University of Colorado at Boulder, 2017.
520 $a Technology advances increasingly require optical systems to be stretchable and tunable. Recently, surface morphologies-based optical systems have emerged as an exciting research area. In this dissertation, we developed several stretchable and tunable optical systems based on surface morphologies with potential applications in bioinspired imaging sensor, smart window, optical grating and optical diffuser.
520 $a Firstly, we solved critically important designing issues of artificial compound eye cameras. Mechanics and optics of the stretchable microlens array, in which each hemispherical microlens sits on top of a supporting post connected to a base membrane, are studied. Our results show that proper designs of the microlenses, supporting posts and base membrane are critically important to meet both mechanical and optical requirements simultaneously. Following this work, we further proposed a simple tuning method via mechanical stretching to tune the optics of elastomeric microlens array (MLA). The results show that extremely large tuning range of the focal length can be achieved using this method.
520 $a Next, we developed a very simple, cheap, and highly effective method to prepare a robust smart window that could be reversibly switched for at least 1000 cycles from highly transparent state to completely opaque through mechanical actuation. Such switchable optical transmittance properties are based on a controlled architecture of surface wrinkling-cracking patterns. Besides for the light transmission control, such window can also be used in display, camouflages and security applications. Furthermore, we developed a multifunctional mechanoresponsive optical system based on hierarchical wrinkling-cracking patterns with multiple applications in smart window, optical grating and optical diffuser.
520 $a Finally, we fabricated the high-performance optical diffuser via the innovative screwthread-like wrinkling patterns. Such diffuser can uniformly distribute the light spots spatially in the rectangular region, exhibiting high total transmittance and optical haze. In addition, two-surface patterned optical diffuser can enhance the optical diffusing performance with much larger scattering region. Moreover, the optical performance of our prepared optical diffuser can be dynamically tuned via the simple mechanical strain.
590 $a School code: 0051.
650 4 $a Mechanical engineering. $3 649730
650 4 $a Mechanics. $3 525881
650 4 $a Optics. $3 517925
690 $a 0548
690 $a 0346
690 $a 0752
710 2 $a University of Colorado at Boulder. $b Mechanical Engineering. $3 1030435
773 0 $t Dissertation Abstracts International $g 78-10B(E).
790 $a 0051
791 $a Ph.D.
792 $a 2017
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10239293