4 results about "Near field imaging" patented technology

The application relates to the technical field of fast near-field imaging, in particular to a quadrilateral MIMO array fast near-field imaging method based on a GPU, which comprises the following steps: a host end issues control instructions and parameters to a high-speed signal processing board carrying an FPGA, an FPGA drives a frequency synthesizer module to generate a local oscillation signal and distributes the local oscillation signal to a quadrilateral MIMO array; the FPGA controls T / R radio frequency front-end devices, sequentially completes scanning operation of multichannel transmission and reception in a time division multiplexing mode, an ADC samples and converts collected echo signals into digital signals, and then the digital signals are transmitted to a GPU; a parallel imaging architecture is constructed in the GPU, and the whole imaging task is decomposed into several independent sub-imaging tasks; after the current sub-imaging task is completed, the current sub-image is superimposed with the last sub-image, until all the sub-imaging tasks are completed, three-dimensional imaging results of the whole imaging area are obtained, and the three-dimensional imaging results are returned to the host end for display.

A device comprising an image sensor for capturing a stream of asynchronous data representing per-pixel changes in radiance within a scene over an acquisition cycle and processing circuitry communicatively coupled to at least one light source positioned to illuminate at least an area of the scene, the processing circuitry configured to modulate output of the at least one light source over the acquisition cycle.

A device comprising an image sensor for capturing a stream of asynchronous data representing per-pixel changes in radiance within a scene over an acquisition cycle and processing circuitry communicatively coupled to at least one light source positioned to illuminate at least an area of the scene, the processing circuitry configured to modulate output of the at least one light source over the acquisition cycle.

This invention discloses a terahertz autocorrelation near-field imaging spectroscopy system, relating to the interdisciplinary field of micro-nano photonics and terahertz photoelectric detection. The system includes: a terahertz emitter, an optical path adjustment unit, a scattering near-field scanning microscope, a terahertz receiver, a current amplifier, a lock-in amplifier, and a processor. This invention employs autocorrelation near-field imaging spectroscopy, which can obtain the time-domain information of terahertz waves by performing autocorrelation measurements on terahertz pulses. The autocorrelation near-field imaging spectroscopy method in this invention also has the ability to enhance signal intensity and suppress background noise. By controlling the optical path difference and adjusting the optical path, the two signals are accumulated to achieve a modulation of the probe resonance effect, which is beneficial for studying the resonance characteristics of the sample itself.