摘要:
The present invention concerns a multicolour excitation module 1 for a multiphoton imaging system 100. Such a module is used for imaging a sample 7 comprising at least three chromophores. The module 1 comprises: a first femtosecond laser source 2, emitting a first excitation beam 20; a second femtosecond laser source 3 emitting a second excitation beam 30. The first excitation beam 20 comprises a so-called "pumping" portion, said pumping portion acting as a pump beam to synchronously excite the second laser source 3, and a so-called "excitation" portion. An optical delay line 4 is arranged to spatially and temporally superpose the second excitation beam 30 and the excitation portion of the first excitation beam, so as to excite at least a third of the chromophores by multiphoton absorption, said absorbed photons coming from the first and second excitation beams 20, 30. The invention also concerns the complete multiphoton imaging system 100, and a method implemented in this module 1.
摘要:
The invention relates to a nonlinear optical microscope using a Bessel laser beam so as to image a sample with good lateral resolution and extended field depth. This microscope incorporates a slide scanner. The sample is disposed on a slide, which is loaded automatically onto a motorized platen, so that the laser beam can sweep the entire slide. The useful signals originating from the sample are combined with the conventional image of the slide scanner so as to obtain a global image which clearly reveals, with good resolution, elements of interest.
摘要:
Method for multi-spectral acquisition and processing of images in order to characterize at least one optical property of a non-linear imaging device, the method comprising: - exciting at at least one wavelength a calibration tool (3) comprising a predefined distribution of harmonic generating nanoparticles (6); - acquiring at least one optical signal generated by the calibration tool in response to this excitation; and - processing the at least one signal to generate therefrom data useful to characterize said at least one optical property of the device.