Event based coherence scanning interferometry.

Coherence scanning interferometry enables high precision measurements in manifold research and industry applications. In most modern systems, a digital camera (CCD/CMOS) is used to record the interference signals for each pixel. When measuring steep surfaces or using light sources with a broad wavelength spectrum, only a small area of the sensor captures useable interference signals in one frame, so a large fraction of pixels is unused.

Optimum Wavelengths in the Near Infrared for Imaging Photoplethysmography.

Objective: The purpose of this contribution is to determine the ideal near infrared wavelength bands for monochromatic and dual-band remote heartbeat detection using imaging photoplethysmography (iPPG) of the forehead.

Methods: Experimental data of 38 healthy volunteers has been recorded and analyzed. For the data acquisition, a fast hyperspectral imager has been used.