grating 33 the components of detection light beam 3 that comprise the same wavelength region as the components of illuminating light beam 1 that were removed by first mask 13 strike the several individual detectors 39 41 43 45 in a particularly simple arrangement the mask itself can even be omitted because the several detectors 39 41 43 45 are used additional information is obtained as to the intensity with which the nonlinear processes are occurring in the various spectral regions this can possibly be utilized for differentiated image production it is also possible to use for second spectral filter 25 at least some of the same optical elements as for first spectral filter 13 by guiding the light beam through at least some of them a second time fig4 shows a further microscope according to the present invention instead of gratings 9 17 33 35 a first prism 47 second prism 49 third prism 51 and fourth prism 53 are used for spectral splitting and combining illuminating light beam 1 generated by pulsed laser 7 is linearly polarized mask 13 rotates through 90 degrees the polarization direction of those components of illuminating light beam 1 that comprise wavelengths from the detection regions the polarization.