文章基本信息

标题：Opto-mechanical combination of a line scanning camera and a micro laserscanner system
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作者：K. Seidl ; J. Knobbe ; D. Schneider 等
期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2006
卷号：XXXVI Part 5
出版社：Copernicus Publications
摘要：Line scanning cameras are used in photogrammetric applications to record images with a very high resolution and a field of view up to 360° horizontally. In order to generate 3D information more than one image is required, which limits the flexibility at complex object geometries. On the other hand terrestrial laser scanner systems are used in numerous applications since some years as a versatile tool for recording 3D geometry in terms of 3D point clouds. For the analysis of the laser scanner data additional image information is often very useful for interactive modelling purposes and for automation of the analysis. Producers of terrestrial laser scanners therefore implement digital cameras to their laser scanner systems. This is mainly done by mounting a digital camera on the laser scanner. This approach requires an accurate orientation between both devices, and it makes the system bulky. Furthermore, the existence of occlusions due to different positions of camera and laser scanner is unavoidable. The paper presents an approach, which combines the advantages of both, reliable 3D information of a laser scanner and high resolution image information of a panoramic camera in one single device. For this combination a concept of an opto-mechanical configuration was developed, where the laser scanner beam and the image information run through the same optical path. One important precondition is the use of a single silicon micro scanning mirror, which was courtesy of IPMS (Fraunhofer Institute for Photonic Mikrosystems) for the investigations. Both, the opto-mechanical integration and the use of a micro scanning mirror, allow for miniaturisation of combined camera and laser scanner systems. Furthermore, the components have a fixed orientation due to the compact construction and there are no occlusions, since both system components use the same optical path and record the same object elements. The opto-mechanical system was simulated, whereby the parameters of the optical parts of the systems were optimized. Finally the simulated and optimized system was tested in terms of an experimental setup. Thus, the functioning of the system could be showed in principle. Future steps on the way to a combined measurement system are the integration of a signal analysis unit, in order to receive distance values, as well as the calibration of the system and the investigation of the accuracy potential
关键词：Panoramic camera; laser scanner; optical path; field lens