Abstract: A method of thermoacoustic imaging of an object includes providing thermoacoustic signals representing a mechanical wave response to a delivery of electromagnetic energy into the imaged object, reconstructing an energy deposition image representing a local energy absorption within the object based on the thermoacoustic signals, and decomposing the energy deposition image into a quantitative absorption image representing a distribution of a local absorption coefficient in the object and at least one further image component.

Abstract: A method of thermoacoustic imaging of an object includes providing thermoacoustic signals representing a mechanical wave response to a delivery of electromagnetic energy into the imaged object, reconstructing an energy deposition image representing a local energy absorption within the object based on the thermoacoustic signals, and decomposing the energy deposition image into a quantitative absorption image representing a distribution of a local absorption coefficient in the object and at least one further image component.

Abstract: A scheme for reconstructing multiband signals that occupy a small part of a given broad frequency range under the constraint of a small number of sampling channels. The multirate sampling scheme (MRS) entails gathering samples at several different rates whose sum is significantly lower than the Nyquist sampling rate. The number of channels does not depend on any characteristics of a signal. The reconstruction method may or may not rely on the synchronization between different sampling channels. The scheme can be implemented easily with optical sampling systems.

Abstract: An optical router for all-optical control over the propagation direction of optical pulses, comprising: (i) a non-uniform one-dimensional photonic crystal receiving a plurality of input optical pulses, comprising: at least one first region used to obtain Bragg solitons; at least one second region in which non-linear interaction between two sufficiently adjacent solitons is obtained; and at least one third region used to de-couple resulting after the interaction pulses outside the one-dimensional photonic crystal's grating; and (ii) a plurality of sufficiently temporally separated optical pulses launched towards said one-dimensional photonic crystal from either of its sides, such that the number of pulses de-coupled from at least one of the sides of the grating is different in case when interaction between the pulses occurs inside the grating, from the case when no interaction between pulse occurs inside the grating.

Abstract: Electro-optical display apparatus includes a plurality of modular units each having a projector for receiving electrical signals, converting them to optical images, and projecting the optical images via an optical projection system onto a screen. The modular units are arranged in a side-by-side array such as to produce a combined display on the screen. A calibration system detects distortions in the combined display caused by the projection system of each modular unit and modifies the electrical signals applied to the projector of each modular unit to correct the combined display with respect to the detected distortions.