Point-spread function reconstruction in high aperture lenses focusing ultra-short laser pulses

Peter Török, Fu Jen Kao*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


In this paper we discuss the measurement of the amplitude point-spread function (PSF) of high aperture lenses focusing ultrashort laser pulses. In the experimental set-up a Twyman-Green interferometer and an autocorrelator are combined to function as a phase-shifting interferometer which is then used to measure the phase distribution in the pupil plane of the lens. Numerical reconstruction of the interferograms permits us to calculate the spatial distribution of the amplitude and phase of the point-spread function. Our work is relevant for cases when ultra-short laser pulses are focused for applications such as two- and three-photon fluorescence, second- and third-harmonic generation microscopy, optical coherence tomography and microscopy, and optical data storage.

Original languageEnglish
Pages (from-to)97-102
Number of pages6
JournalOptics Communications
Issue number1-3
StatePublished - 15 Nov 2002


  • Autocorrelator
  • High aperture
  • Phase-shifting interferometry
  • Point-spread function
  • Twyman-Green interferometer
  • Ultra-short pulse


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