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Title: A Ferrofluid Deformable Mirror for Adaptive Optics
Authors: Lemmer, Aaron
Advisors: Kasdin, N. Jeremy
Contributors: Mechanical and Aerospace Engineering Department
Keywords: adaptive optics
deformable mirror
high-contrast imaging
Subjects: Optics
Issue Date: 2022
Publisher: Princeton, NJ : Princeton University
Abstract: Increasing multi-disciplinary demand for imaging and optical signal processing modalities with extreme performance capabilities has fueled the adoption of adaptive optics technologies, which synthesize optical systems with suitable properties by manipulating propagating wavefields in closed-loop feedback to combat adverse diffraction effects and dynamic wavefront aberrations. Deformable mirrors are the primary enabling technology for adaptive optics. The challenges associated with high-contrast imaging of Earth-like exoplanets has paced the ongoing rapid advancements in deformable mirror design and modeling. Motivated by this application, this research studies a new ferrofluid deformable mirror concept, including the development of several prototypes and the investigation of the underlying physics and theoretical performance capability through a first-principles approach. The mathematical model illuminates important dimensionless quantities that characterize the susceptibility of the flexible reflective surface to gravitational and fluid-mediated magnetic forces. It also demonstrates the theoretical possibility of using configurable magnetic fields to produce localized bidirectional deformations of the mirror. This work determines the reachable mirror shapes and the degree of controllability of those shapes as well as the relationship of those properties to key design parameters, discusses the fundamental limitations of the ferrofluid deformable mirror concept, and recommends directions for future work.
Alternate format: The Mudd Manuscript Library retains one bound copy of each dissertation. Search for these copies in the library's main catalog:
Type of Material: Academic dissertations (Ph.D.)
Language: en
Appears in Collections:Mechanical and Aerospace Engineering

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