Laser triangulation: Fundamental uncertainty in distance measurement

Häusler G (1994)

Publication Type: Journal article

Publication year: 1994


Publisher: Osa Optical Society of America

Book Volume: 33

Pages Range: 1306-1314

Journal Issue: 7


This paper presents a theoretical discussion of the fundamental uncertainty of distance measurements by caused by speckle during laser triangulation. Other contributing factors are the observation aperture and the angle of triangulation. For short-range macroscopic applications this uncertainty is in the range of couple micrometers to more than 10 μm, and is independent of the size of the spot size projected, provided this spot is larger than the observed speckle. Low temporal illumination reduces the uncertainty by more than twice for rough surfaces, although N-fold loss of lateral resolution results from an N-fold improvement in the distance uncertainty.

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How to cite


Häusler, G. (1994). Laser triangulation: Fundamental uncertainty in distance measurement. Applied Optics, 33(7), 1306-1314.


Häusler, Gerd. "Laser triangulation: Fundamental uncertainty in distance measurement." Applied Optics 33.7 (1994): 1306-1314.

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