EE ZOOM Seminar: HIGH POWER DYNAMIC STRUCTURED LIGHT 3D RECONSTRUCTION SYSTEM BASED ON RESONANCE DOMAIN DIFFRACTIVE OPTICS
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You are invited to attend a lecture On Thursday, 30 April 2020, 15:00
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https://us04web.zoom.us/j/73978006567
HIGH POWER DYNAMIC STRUCTURED LIGHT 3D RECONSTRUCTION SYSTEM BASED ON RESONANCE DOMAIN DIFFRACTIVE OPTICS
By:
Omer Stein
M.Sc student under the supervision of Prof. Michael Golub,
Prof. Menachem Nathan, Prof. Shlomo Ruschin
Abstract
Structured light is one of the most common 3D data acquisition technique used in industry. Traditionally, structured light methods are used to obtain 3D information of an object, using predetermined illumination patterns to encode spatial data for later triangulation and reconstruction. A multitude of pattern types exist, which achieve varying degrees of depth resolution, depending on the needs of the user and the demand on the system. Means of projecting these patterns vary as well, including off the shelf DLP projectors, scanning mirror laser projectors and diffractive optics based laser projectors. Diffractive optics based projectors are one of the most cost effective and power efficient options, but are limited in projection angles. Traditional DLP or scanning mirror projectors can have high angles of projection, but can be very large and power consuming, lack illumination power, or present an eye safety hazard. In this work, we show the feasibility of a gray coded structured light 3D reconstruction system, based on resonance domain diffractive optical elements previously developed by our group, which allow for wide fanout angles with very high diffraction efficiency and close to diffraction-limited fidelity of the projected intensity patterns, leading to a compact, low cost, high preforming 3D reconstruction system. We present the design, characteristics, simulation and experimental results of our proposed setup, using real world objects, and compare our results with comparable commercially available projectors.
