NEW CONCEPT OF A PHOTOGRAMMETRY SYSTEM WITH ADAPTED ”INTELLIGENT” ILLUMINATION FOR 3D-SHAPE CAPTURE USING COMPUTERGENERATED HOLOGRAMMS |
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| A. Bai, M. Zacher, T. Pfeifer |
- Abstract:
- A non-contact measurement system, based on the principle of photogrammetry, developed at the Fraunhofer IPT, permits a highly exact 3D-shapemeasurement of objects. Because of the limited depth focus of the projection lens used, the axial measurement range is reduced to only a few centimetres. In order to digitize the 3D-shape of technical objects of various dimensions, the structured illumination on the object surface must be in focus for each axial depth. The principle of holographic projection offers a crucial benefit, in order to project a sharp pattern in any plane. By applying computer generated holograms for projection of patterns, further depth information can be encoded. Only this allows the measuring of 3Dshapes in one step.
- Keywords:
- photogrammetry, optical 3D-measurement, holography, structured illumination
- Download:
- IMEKO-WC-2000-TC14-P354.pdf
- DOI:
- -
- Event details
- Event name:
- XVI IMEKO World Congress
- Title:
Measurement - Supports Science - Improves Technology - Protects Environment ... and Provides Employment - Now and in the Future
- Place:
- Vienna, AUSTRIA
- Time:
- 25 September 2000 - 28 September 2000