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15 January 2008 Scheme of real-time Dammann grating based miniaturized three-dimensional endoscopic imaging system
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A real-time miniaturized three-dimensional endoscopic imaging system basing on Dammann grating array illumination is proposed. The system consists of two endoscopic channels that one channel is used to project an array structured light generated by Dammann grating on an object and the other is used to obtain images from the object to measure its surface profile. Using the special designed Dammann grating, it is very simple to generate an array structured light, couple it into the endoscopic channel and project it on an object. The measured images are processed with a standard image processing procedure and the surface profile is extracted by Fourier transform profilometry algorithm. With the development of computer hardware and fast image processing algorithms, the imaging system can acquire real-time data and dynamically process three-dimensional measurements. The system was evaluated in 3-D measurements of several objects with known geometries. The results show high accuracy of the imaging system and its potential applications in clinic and biology research.
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Xiaoxin Wang, Changhe Zhou, and Enwen Dai "Scheme of real-time Dammann grating based miniaturized three-dimensional endoscopic imaging system", Proc. SPIE 6832, Holography and Diffractive Optics III, 68320R (15 January 2008);


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