High frame-rate multichannel beam-scanning microscopy
A beam-scanning optical design is described for achieving up to kHz frame-rate optical imaging on multiple simultaneous data acquisition channels. In one embodiment, two fast-scan resonant mirrors direct the optical beam on a circuitous trajectory through the field of view, with the trajectory repeat-time given by the least common multiplier of the mirror periods. Dicing the raw time-domain data into sub-trajectories combined with model-based image reconstruction (MBIR) 3D in-painting algorithms allows for effective frame-rates much higher than the repeat time of the Lissajous trajectory. Because sub-trajectory and full-trajectory imaging are different methods of analyzing the same data, both high-frame rate images with relatively low resolution and low frame rate images with high resolution are simultaneously acquired.
1. A system for beam-scanning and imaging, comprising:
two synchronized fast-scanning resonant mirrors of differing resonant frequencies to scan the beam in a Lissajous trajectory across a sample surface;
implementation of a data acquisition and analysis technique for binning the image data into user-defined temporal bins, resulting in user-defined frame-rates; and
a strategy for interpolating the values of unsampled pixels using image interpolation ‘inpainting’ techniques, which include but is not limited to model-based image reconstruction (MBIR) and discrete cosine transform (DCT) coupled with a penalized least squares (DCT-LS), the image interpolation may use some or all of the available dimensions of information, including spatial information, temporal information, polarization information, and spectral information.
2. The system of claim 1 , the system is capable of achieving up to kHz frame-rate optical imaging.
3. The system of claim 1 , the system of capable of achieving optical imaging on multiple simultaneous data acquisition channels.