Abstract

We demonstrate Fourier-domain optical-coherence microscopy (OCM) method that uses blue light for high-resolution microscopic imaging. Spectrally broad bandwidth is obtained by means of second-harmonic generation of Ti:sapphire laser light on the nonlinear crystal. Angular scanning of the crystal performed by a resonant scanner results in second-harmonic generation for a broad range of frequencies producing blue light with central wavelength of 402 nm and bandwidth of 35 nm in one cycle. The axial resolution of the new setup is 3.5 μm in air, and the transverse resolution for Olympus 40× objective lens is 2.7 μm in X direction and 3.2 μm in Y direction. The developed technique enables registering spectral interferometric signal directly in k domain. Additionally, we present examples of imaging a biological specimen using the newly developed method.

© 2015 Optical Society of America

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