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Miniaturization of a coherent monocular structured illumination system for future combination with digital holography

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Light(Advanced Manufacturing) 2022年第3期3卷 160-167页

作者： Andreas Walter Stark Eugene Wong Holger Babovsky Christian Franke Richard Kowarschik Institute of Applied Optics and Biophysics Friedrich Schiller University Jena07743 JenaGermany University Hospital 07743 JenaGermany

Holographic and 3D-measurement processes are an often-used tool in industry,medicine,and scientific *** small deviations of objects can be visualized by holographic means with high accuracy,optical systems with active structured illumination are a reliable source of absolute 3D-information in these *** combination of digital holography with structured illumination allows to simultaneously measure deformations and absolute 3D coordinates but also requires coherent light and has already been demonstrated in principle with a stereo camera ***-camera systems are limited to certain setup sizes given by the volume and distance of the *** the system to a one-camera(monocular)setup reduces space and acquisition *** using a multi-aperture illumination source an extremely high projection rate could be realized and reduced to a monocular approach with a novel voxel-calibration technique,while the projection system itself still requires a large amount of *** this paper we present a miniaturized,monocular 3D-measurement system that works with repeatable,coherent speckles,generated by a fiber-coupled laser whose light was distributed by a fiber-switch to a diffuser plate connected with a measurement-head,also including a *** addressing different fibers through the switch,varying but repeatable patterns are *** size of the device(diameter<3 cm)is now mainly limited by the volume of the camera.A first 3D-reconstruction of an object and an outlook for a combination of this system with digital holography is given,allowing absolute 3D-coordinates and relative deviations of object points to be measured simultaneously.

关键词： 3D-measurement Structured illumination speckle projection Monocular 3D-measurement Combination 3D-measurment and holography

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