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Proceedings Article

Risley prism scan patterns

[+] Author Affiliations
Gerald F. Marshall

Consultant in Optics (USA)

Proc. SPIE 3787, Optical Scanning: Design and Application, 74 (July 2, 1999); doi:10.1117/12.351658
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From Conference Volume 3787

  • Optical Scanning: Design and Application
  • Leo Beiser; Stephen F. Sagan; Gerald F. Marshall
  • Denver, CO, USA | July 18, 1999

abstract

The Risley optical scanning system consists of two sequential wedge prisms, which have wedge angles A1 and A2, that are capable of rotating about the optical scan axis at angular speeds (omega) 1 and (omega) 2. When a focused laser beam is directed along the optical scan axis and through the prisms, the emergent beam is deviated in a direction according to the relative orientation of the prisms with respect to each other. When the individual prisms are rotated clockwise or counterclockwise, the combined deviation angle and the orientation phase change with time, such that the image spot traces out a vector pattern. This paper presents an interesting set of generated scan patterns that include regular polygons by selecting particular values for the ratios of A2/A1 and (omega) 2/(omega) 1.

© (1999) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Gerald F. Marshall
"Risley prism scan patterns", Proc. SPIE 3787, Optical Scanning: Design and Application, 74 (July 2, 1999); doi:10.1117/12.351658; http://dx.doi.org/10.1117/12.351658


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