Measurement of the pulse-front distortion in high-numerical-aperture optics
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Using ultrashort laser pulses in combination with laser scanning microscopes offers the fascinating possibility to investigate samples with high spatial and temporal resolution. On the other hand the use of ultrashort pulses leads to pulse broadening and pulse-front distortion due to the dispersion of the optical elements. Three different experimental techniques are presented which are able to determine the pulse-front distortion for high-numerical-aperture objectives due to chromatic and spherical aberration. Results for a number of widely used objectives are listed.
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