Abstract: A method for visualization of cardiovascular pulsation waves. A living body is illuminated with light penetrating through a skin of the body for interacting via absorption and/or scattering with a vascular system of the living body. Light reflected from the living body is collected in a focused frame into an image capturing device. A series of frames is captured by the image capturing unit. The frames of the series of frames are multiplied by a reference function synchronized with a periodical physiological process of the body. A correlation image is formed by summarizing respective pixels over the frames of the series of frames to the reference function. An output image representing dynamics of blood-pulsation waves in the living body is calculated from the correlation images as function of the phase of the periodical physiological process of the body. Also a system for application of the method.

Abstract: An optical fiber sensor system comprising of an optical fiber including plurality of sensitive elements, each sensitive element has characteristic spectral band which in normal undisturbed condition lies in a first wavelength range and, under an influence of some specified condition to be detected, shifts to a second wavelength range; first and second wavelength ranges do not overlap. Means for probing an optical transmission or reflection of the fiber operate within second wavelength range to monitor the changes of the transparency or reflectivity of the fiber caused by the shift of characteristic spectral band into the second wavelength range. The invention provides means for distributed monitoring of equipment or construction structures and detection of specified conditions and can provide alarm signal when the specified conditions become effective.

Abstract: An optical fiber sensor system comprising of an optical fiber including plurality of sensitive elements, each sensitive element has characteristic spectral band which in normal undisturbed condition lies in a first wavelength range and, under an influence of some specified condition to be detected, shifts to a second wavelength range; first and second wavelength ranges do not overlap. Means for probing an optical transmission or reflection of the fiber operate within second wavelength range to monitor the changes of the transparency or reflectivity of the fiber caused by the shift of characteristic spectral band into the second wavelength range.