Analysis and Design of Binary Optics Lenses

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Motamedi, Nojan | 2009

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 39475 (05)
University: Sharif University of Technology
Department: Electrical Engineering
Advisor(s): Mehrany, Khashayar; Rashidian, Bijan
Abstract:
Diffractive optical elements with binary surface profile are of great importance in integrated optical applications. Being easy to fabricate and having high degree of freedom in design, such devices play an outstanding role in optical applications. Specifically, binary (multilevel) lenses are investigated in this dissertation. These lenses are fabricated through conventional IC fabrication methods (lithography, etching, …) and have an acceptable performance and small aberration with proper design. Different scalar and vectorial methods for the analysis of finite aperture diffractive optical elements have been investigated and advantages and disadvantages of each one have been discussed. Boundary element method is used as a rigorous analysis approach. Next, the performance of binary and conventional lenses (Spheric and Aspheric) is compared. Spot size, diffraction efficiency and depth of focus have been investigated specifically. At the end, a grating based structure is introduced which can be used to focus a Gaussian beam
Keywords:
Vectorial Analysis ; Boundary Element Method ; Diffraction Gratings ; Binary Lenses ; Scalar Analysis

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