Bio-inspired optical components
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2008.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2009
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| Online Access: | http://hdl.handle.net/1721.1/45950 |
| _version_ | 1811068869265063936 |
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| author | Walish, Joseph John |
| author2 | Edwin L. Thomas. |
| author_facet | Edwin L. Thomas. Walish, Joseph John |
| author_sort | Walish, Joseph John |
| collection | MIT |
| description | Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2008. |
| first_indexed | 2024-09-23T08:02:14Z |
| format | Thesis |
| id | mit-1721.1/45950 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T08:02:14Z |
| publishDate | 2009 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/459502019-04-09T16:13:00Z Bio-inspired optical components Walish, Joseph John Edwin L. Thomas. Massachusetts Institute of Technology. Dept. of Materials Science and Engineering. Massachusetts Institute of Technology. Dept. of Materials Science and Engineering. Materials Science and Engineering. Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2008. Includes bibliographical references. Guiding electro-magnetic radiation is fundamental to optics. Lenses, mirrors, and photonic crystals all accomplish this task by different routes. Understanding the interaction of light with materials is fundamental to improving and extending optical science and engineering as well as producing novel optical elements. Improvement in this understanding should not only include work to understand the interaction with traditional engineering materials but also should target the understanding of the interaction of electromagnetic radiation with biological structures as millions of years of evolution have sorted out numerous ways to modulate light (e.g. the fish eye or the skin of the octopus). The goal of this thesis work is to fabricate novel optical elements by taking cues from nature and extending the state of the art in light guiding behavior. Here, optical elements are defined as structured materials that guide or direct electromagnetic radiation in a predetermined manner. The work presented in this thesis encompasses biologically inspired tunable multilayer reflectors made from block copolymers and improvements to liquid filled lenses which mimic the human eye.In this thesis a poly(styrene)-poly(2-vinylpyridine) block copolymer was used to create a bio-mimetic, one-dimensional, multilayer reflector. The wavelengths of light reflected from this multilayer reflector or Bragg stack were tuned by the application of stimuli which included temperature, change in the solvent environment, pH, salt concentration in the solvent, and electrochemistry. (cont.) A linear-shear rheometer was also built to investigate the mechanochromic color change brought about through the shearing of a one-dimensional, high molecular-weight, block-copolymer, photonic gel. Biologically inspired lenses were also studied through the construction of a finite element model which simulated the behavior of a liquid-filled lens. Several tunable parameters, such as the modulus, internal residual stress, and thickness of the membrane were studied for their influence on the shape of the lens membrane. Based on these findings, suggestions for the reduction of spherical aberration in a liquid filled lens were made. A gradient in the elastic modulus of the membrane was also investigated for use in the reduction of spherical aberration. by Joseph John Walish. Ph.D. 2009-06-30T16:47:19Z 2009-06-30T16:47:19Z 2008 2008 Thesis http://hdl.handle.net/1721.1/45950 321057866 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 220 p. application/pdf Massachusetts Institute of Technology |
| spellingShingle | Materials Science and Engineering. Walish, Joseph John Bio-inspired optical components |
| title | Bio-inspired optical components |
| title_full | Bio-inspired optical components |
| title_fullStr | Bio-inspired optical components |
| title_full_unstemmed | Bio-inspired optical components |
| title_short | Bio-inspired optical components |
| title_sort | bio inspired optical components |
| topic | Materials Science and Engineering. |
| url | http://hdl.handle.net/1721.1/45950 |
| work_keys_str_mv | AT walishjosephjohn bioinspiredopticalcomponents |