Miniaturized digital holography sensor for distal three-dimensional endoscopy
| Autor: | Wolfgang Osten, Werner Jüptner, Songcan Lai, Reiner Klattenhoff, Christoph von Kopylow, Ervin Kolenovic |
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| Rok vydání: | 2003 |
| Předmět: |
Endoscopes
Physics Miniaturization business.industry Materials Science (miscellaneous) System of measurement Holography Endoscopy Equipment Design Holographic interferometry Models Biological Industrial and Manufacturing Engineering law.invention Interferometry Imaging Three-Dimensional Optics law Humans Speckle imaging Business and International Management Image sensor business Digital holography |
| Zdroj: | Applied Optics. 42:5167 |
| ISSN: | 1539-4522 0003-6935 |
| DOI: | 10.1364/ao.42.005167 |
| Popis: | A miniaturized sensor head for endoscopic measurements based on digital holography is described. The system was developed to measure the shape and the three-dimensional deformation of objects located at places to which there is no access by common measurement systems. A miniaturized optical sensor, including a complete digital holographic interferometer with a CCD camera, is placed at the end of a flexible endoscope. The diameter of the head is smaller than 10 mm. The system enables interferometric measurements to be made at speeds of as many as five reconstructions per second, and it can be used outside the laboratory under normal environmental conditions. Shape measurements are performed with two wavelengths for contouring, and the deformation is measured by digital holographic interferometry. To obtain full three-dimensional data in displacement measurements we illuminate the object sequentially from three different illumination directions. To increase the lateral resolution we use temporal phase shifting. |
| Databáze: | OpenAIRE |
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