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Applied Optics

Applied Optics


  • Vol. 51, Iss. 12 — Apr. 20, 2012
  • pp: 1982–1996

Diffractive/refractive (hybrid) UV-imaging system for minimally invasive metrology: design, performance, and application experiments

René Reichle, Christof Pruss, Christopher Gessenhardt, Christof Schulz, and Wolfgang Osten  »View Author Affiliations

Applied Optics, Vol. 51, Issue 12, pp. 1982-1996 (2012)

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A hybrid imaging system was developed to enable the application of laser-based measurement techniques like UV laser-induced fluorescence in near-production engines with small access ports. For this task, wide-angle characteristics and high lens speed are required in combination with small engine-bound optics able to survive in harsh environmental conditions. Our approach combines a simple and robust access lens with refractive/diffractive (hybrid) imaging stages away from the engine that are customized for individual wavelength bands. We give a detailed insight into the design strategy, including the integration of diffractive optics and the performance of the system with analysis of the modulation transfer function (MTF), lens speed, and stray light. Finally, results from applications in an actual engine are shown.

© 2012 Optical Society of America

OCIS Codes
(120.4820) Instrumentation, measurement, and metrology : Optical systems
(220.1000) Optical design and fabrication : Aberration compensation
(220.3620) Optical design and fabrication : Lens system design
(220.4830) Optical design and fabrication : Systems design
(220.4840) Optical design and fabrication : Testing
(050.1965) Diffraction and gratings : Diffractive lenses

ToC Category:
Optical Design and Fabrication

Original Manuscript: November 22, 2011
Manuscript Accepted: December 28, 2011
Published: April 12, 2012

René Reichle, Christof Pruss, Christopher Gessenhardt, Christof Schulz, and Wolfgang Osten, "Diffractive/refractive (hybrid) UV-imaging system for minimally invasive metrology: design, performance, and application experiments," Appl. Opt. 51, 1982-1996 (2012)

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