Häusler G (2003)
Publication Type: Journal article
Publication year: 2003
Publisher: International Society for Optical Engineering; 1999
Book Volume: 4933
Pages Range: 48-52
DOI: 10.1117/12.516575
Commonly, optical systems are called coherent, if a laser is used (right), and incoherent if other sources come into play (wrong). Most opticists are not aware that parasitic spatial coherence is ubiquitous, even if it is unobvious. The pretended incoherent approach may lead to significant quantitative measuring errors of illumination or reflectivity, 3d shape, size or distance. On the other hand, a favourable property of spatial coherence is that among the "speckle noise" we may reveal useful information about the object, by white light interferometry. This report will discuss simple rules to estimate the occuring errors and how to reduce spatial coherence. We will further discuss the complex signal formation in white light interferometry and roughness measurements far beyond the bandwidth limit of the observing optics.
APA:
Häusler, G. (2003). Ubiquitous coherence - boon and bale of the optical metrologist. Proceedings of SPIE, 4933, 48-52. https://doi.org/10.1117/12.516575
MLA:
Häusler, Gerd. "Ubiquitous coherence - boon and bale of the optical metrologist." Proceedings of SPIE 4933 (2003): 48-52.
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