We have successfully developed a multiphoton-induced hyperspectral microscopy based on a 1064 nm femtosecond excitation source. Nonlinear excitation by the laser localized to the focal point allows efficient non-descanned detection (NDD) while achieving optically sectioned imaging. The use of 1064 nm laser excitation increases the imaging depth while minimizing sample damage. The system combines the advantages of NDD for 3D imagingrich spectral information through confocal hyperspectral imaging, leading to potential applications in the emerging material R&Dbiomedical research.

Harmoscope is a virtual biopsy technology for dermatology. The superior performances of in vivo Harmoscope has been clinically validated by NTU hospital for 14 years, with the deepest penetration, super-resolution,the highest contrast all at the same time. Without imaging processinglabeling, Harmoscope raw images provide the same level of resolutioninformation as the time-consuming gold standard H&E histopathology, allowing dermatologists and pathologists to grade and classify various skin lesions for immediate therapeutic decision without physical biopsy. This award-winning technology will release the saturated loading of skin biopsy examination, greatly improve the quality of point of care, while providing a trauma-free real-time alternative for skin lesion patients.

This technique uses multimodal nonlinear optical microscopy with the image contrast of second harmonic generation (SHG)coherent anti-Stokes Raman scattering (CARS). By analyzing the nonlinear signals on images, it can be used to characterizequantify the structural variation in the collagen scaffolds processed with different crosslinking methods. The correlation between signalsmechanical properties can then be derived. Additionally, comparative analysis of these two signals can be used to monitor the structural (triple-helix) change of collagen molecules during the crosslinking processes.