The internship is with a company on cardiology. The purpose is to build up a Laser speckle contrast imaging setup and algorithm in order to measure important parameters for blood flow, for instance, the heart rate and velocity.
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| An example of Laser Speckle pattern |
A laser speckle is the coherence interference pattern of surface or material due to the local refractive index variation. Speckle sometimes is considered as noise for coherent optical imaging method like OCT. But actually, it contains much information about the material itself and the illuminating light. For example, the laser speckle contrast is modified by the periodic pulsed blood flow, one can easily extract the heart rate info from the speckles.
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| Laser spot on a fingertip |
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