We report the use of adaptive optics with coherent anti-Stokes Raman scattering (CARS) microscopy for label-free deep tissue imaging based on molecular vibrational spectroscopy. The setup employs a deformable membrane mirror and a random search optimization algorithm to improve signal intensity and image quality at large sample depths. We demonstrate the ability to correct for both system and sample-induced aberrations in test samples as well as in muscle tissue in order to enhance the CARS signal. The combined system and sample-induced aberration correction increased the signal by an average factor of ~3x for the test samples at a depth of 700 μm and ~6x for muscle tissue at a depth of 260μm. The enhanced signal and higher penetration depth offered by adaptive optics will augment CARS microscopy as an in vivo and in situ biomedical imaging modality.
- medical and biological imaging
- non linear microscopy
- aberration correction
- active or adaptive optics
- coherent anti-Stokes Raman scattering
Wright, A. J., Poland, S. P., Girkin, J. M., Freudiger, C. W., Evans, C. L., & Xie, X. S. (2007). Adaptive optics for enhanced signal in CARS microscopy. Optics Express, 15(26), 18209-18219. https://doi.org/10.1364/OE.15.018209