A MODIFIED SELF-INTERFERENCE BASED INCOHERENT DIGITAL HOLOGRAPHIC RECORDING SYSTEM

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Mishra, A. (2019). A MODIFIED SELF-INTERFERENCE BASED INCOHERENT DIGITAL HOLOGRAPHIC RECORDING SYSTEM. Unc Charlotte Electronic Theses And Dissertations.
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Abstract

A Fresnel-type self-interference based incoherent digital holographic system that can measure the intensity and direction of incoming light field is proposed. This system is composed primarily of a convex lens as an objective, a linear polarizer, a fluorescence bandpass filter, a Geometric-Phase (GP) lens, a relay lens and a monochromatic polarized camera. The GP lens is employed as a polarization selective common path interferometer. It simultaneously modulates the incoming wavefront by its positive and negative focal lengths. The wavefront modulation and phase shifting are performed purely by the geometric phase modulation. The parallel-phase shifting method is utilized to obtain a single complex hologram by using a monochromatic polarized image sensor. With the generated hologram, it is possible to digitally reconstruct images by focusing to different planes. A modified Angular Spectrum (AS) algorithm enables an accurate and efficient wavefield propagation for reconstruction of the holograms. The system parameters for the modified Geometric Phase-Self interference Incoherent Digital Holography (GP-SIDH) architecture are analyzed and evaluated to characterize the bounds for optimum reconstruction results based on a given set of criterion.

Details
Author

Mishra, Abhinav

Title

A MODIFIED SELF-INTERFERENCE BASED INCOHERENT DIGITAL HOLOGRAPHIC RECORDING SYSTEM

Physical Description

1 online resource (73 pages) : PDF

Date

2019

Degree Granting Institution

University of North Carolina at Charlotte

Abstract

A Fresnel-type self-interference based incoherent digital holographic system that can measure the intensity and direction of incoming light field is proposed. This system is composed primarily of a convex lens as an objective, a linear polarizer, a fluorescence bandpass filter, a Geometric-Phase (GP) lens, a relay lens and a monochromatic polarized camera. The GP lens is employed as a polarization selective common path interferometer. It simultaneously modulates the incoming wavefront by its positive and negative focal lengths. The wavefront modulation and phase shifting are performed purely by the geometric phase modulation. The parallel-phase shifting method is utilized to obtain a single complex hologram by using a monochromatic polarized image sensor. With the generated hologram, it is possible to digitally reconstruct images by focusing to different planes. A modified Angular Spectrum (AS) algorithm enables an accurate and efficient wavefield propagation for reconstruction of the holograms. The system parameters for the modified Geometric Phase-Self interference Incoherent Digital Holography (GP-SIDH) architecture are analyzed and evaluated to characterize the bounds for optimum reconstruction results based on a given set of criterion.

Genre

masters theses

Subjects--Topics

Mechanical engineering
Optics

Degree

M.S.

Keywords

Angular Spectrum Method
Digital Image Processing
Geometric-Phase Lens
Incoherent Holography
Self-Interference Technique
Wave Propagation

Subject Area

Mechanical Engineering

Advisor(s)

Falaggis, Konstantinos

Committee Members

Miller, Jimmie
Porras-Aguilar, Rosario

Degree Note

Thesis (M.S.)--University of North Carolina at Charlotte, 2019.

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Rights Holder Information

Copyright is held by the author unless otherwise indicated.

Identifier

Mishra_uncc_0694N_12306

Permalink

http://hdl.handle.net/20.500.13093/etd:2491