High-speed remote laser scanning using coherent fiber optics

Donald J. Svetkoff; Donald B.T. Kilgus; David P. Berrich

doi:10.1117/12.198854

6 January 1994 High-speed remote laser scanning using coherent fiber optics

Donald J. Svetkoff, Donald B.T. Kilgus, David P. Berrich

Proceedings Volume 2348, Imaging and Illumination for Metrology and Inspection; (1994) https://doi.org/10.1117/12.198854
Event: Photonics for Industrial Applications, 1994, Boston, MA, United States

Abstract

Coherent fiber optic image guides are often utilized in remote imaging systems when space is restricted, articulation is required, or for operation in hazardous environments. Conventionally, the object under test is illuminated with incoherent light, and the resulting image is transmitted to a linear or area sensor array where the image is scanned. A compact and rugged fiber optic coupled 'full field" laser scanning system could also provide benefits for certain demanding inspection tasks, particularly for acquisition of three dimensional information or for meeting very wide dynamic range requirements. In such applications the object is scanned and a point sensor or linear array is used for light gathering. In this paper fundamental factors limiting image quality and resolution are identified with empirical results used to establish a performance benchmark. The image sampling approach is critical for obtaining useful data in a high speed system. A method for real time image sampling is proposed which may also prove useful for multi-fiber beam delivery systems. The sampling method also provides several practical benefits required for high speed operation in potentially rugged and harsh environments. Keywords: laser scanning, remote sensing, 3D imaging, fiber optics.

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Donald J. Svetkoff, Donald B.T. Kilgus, and David P. Berrich "High-speed remote laser scanning using coherent fiber optics", Proc. SPIE 2348, Imaging and Illumination for Metrology and Inspection, (6 January 1994); https://doi.org/10.1117/12.198854

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KEYWORDS

Fiber optics

Imaging systems

Image quality

Laser scanners

Modulation

Fiber lasers

Inspection

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