  We demonstrate coherent anti-Stokes Raman scattering (CARS) microscopy in a
wide-field setup with nanosecond laser pulse excitation. In contrast to
confocal setups, the image of a sample can be recorded with a single pair of
excitation pulses. For this purpose the excitation geometry is specially
designed in order to satisfy the phase matching condition over the whole sample
area. The spectral, temporal and spatial sensitivity of the method is
demonstrated by imaging test samples, i.e. oil vesicles in sunflower seeds, on
a nanosecond timescale. The method provides snapshot imaging in 3 nanoseconds
with a spectral resolution of 25 wavenumbers (cm$^{-1}$).

Optics;Biological Physics