56 results about "Quantum imaging" patented technology

The present invention is directed to a method of integrating information, including real-time information, into a virtual thematic environment using a computer system, including accessing the stored information from a database or downloading the real-time information from a source external to the thematic environment; inserting the real-time information into the thematic environment; and displaying the information to a user within the thematic environment. In one embodiment, the computer system is connected to a holographic projection system such that the images from the thematic environment can be projected as holographic projections. The computer system includes an interactive software application platform having at least one thematic / publishing logic module which contains thematic environment rules; at least one digital content library module which provides content management on the thematic environment; and at least one quantum imaging environment (QIE) module which interprets content such that the content is manipulated and accessed by any device.

The invention discloses a hyperbolic metamaterial composite grating-enhanced high-frequency quantum-dot single photon source. The hyperbolic metamaterial composite grating-enhanced high-frequency quantum-dot single photon source comprises a substrate, a hyperbolic metamaterial and quantum dots, wherein a grating microstructure is arranged on a surface of the hyperbolic metamaterial or in the hyperbolic metamaterial, the hyperbolic metamaterial is of a one-dimensional periodic structure formed by alternatively arranging dielectric thin films and metal thin films or the dielectric thin films and metal-like thin films, and the quantum dots are arranged in the one-dimensional periodic structure or a near field of the hyperbolic metamaterial. Spontaneous radiation enhancement of wideband of the quantum dots is achieved by the hyperbolic metamaterial, the light emergent efficiency is improved by simultaneously combining directional coupling output characteristic of the grating, the photon generation ratio and the collection and utilization ratio of the quantum-dot single photon source are greatly improved, and the high-frequency, high-brightness and directional-emission quantum-dot single photon source of GHz or above can be achieved; and meanwhile, two excitation modes of optical pumping and electric pumping are compatible, and the quantum-dot single photon source is suitable for various wave bands to an infrared band from an ultraviolet band and can be widely applied to related fields of quantum information, quantum computation, quantum imaging, quantum authentication and quantum precision measurement.

A quantum-imaging system for detecting photons, including short-wavelength (<1 nm) photons, is provided. A quantum imaging system can include optical read-out and optical means, and can be configured to perform as both a photon counter and a photon spectrometer. A quantum-imaging system can function as a photon counter and be configured to measure photon beam fluences (e.g., in J / cm2) for both strong beams and weak beams, the latter ones, for example, in the intensity range of 1 pJ / cm2sec, or 0.1 μSv / h. The quantum-imaging system can also function as a photon spectrometer and can be configured to measure photon energies with high energy resolution such as, for example, 1% of photon energy.

The invention discloses a compressed sensing imaging device and method based on an entangled two-photon signal, and solves the problem of not high imaging quality under the condition of low sampling number. According to the method, a deterministic determinacy random matrix is loaded in a spatial light modulator of an original quantum imaging device to complete imaging of a target object; and during preparation of entangled light, a telescoping system and a 0-degree incident heat mirror and a low-pass narrow-band filter which are placed along a laser transmission direction among the telescopingsystem are adopted to process laser. The imaging method includes producing a picture for being input to a spatial light modulator; inputting the picture to the spatial light modulator; preparing entangled light; obtaining a matched result value; loading a plurality of sets of modulated observation matrices and obtaining M matched results; constructing a quantum imaging mathematical model; and adopting a compressed sensing algorithm to solve a quantum imaging relational expression to restore an image of the target object. The entangled light prepared by the compressed sensing imaging device and method provided by the invention is high in purity and can well restore the image of the target object under the condition of a low sampling rate.

The invention provides an intensity-correlation star sensor which comprises a first lens hood, a second lens hood, a first optical telescope, a second optical telescope, a scanning type sensor, a single photon sensor, electronics read-out equipment, video processing equipment, a satellite-borne time-frequency device, satellite-borne data processing equipment and an interface. By using detection signals of two paths of optical detection systems, the obtained two paths of electric signals are subjected to time synchronization by using the satellite-borne time-frequency device, and are subjected to intensity-correlation signal processing in the satellite-borne data processing equipment. Therefore, on the basis of keeping an integral appearance shape of an optical system of an original star sensor unchangeable, an internal structure is locally regulated, and the engineering realization is easy. The starry sky is imaged by using an intensity-correlation method in a quantum imaging technology, and is searched by using the scanning type sensor; the single photon is used in the other path, relatively dark star bodies are relatively easily detected, and the detection sensitivity is greatly improved.

The invention discloses a quantum imaging method and a quantum imaging system. The method comprises the following steps: S1) providing incident light; S2) splitting the incident light into signal light and reference light; S3) after the signal light irradiates an imaging object, collecting the light by a bucket detector and defining the nth measuring result as (SB)n; S4) collecting the reference light by a planar array detector, and defining the nth measuring result as (IR(x,y))n, wherein the (x,y) is pixel point coordinates corresponding to the planar array detector; and S5) storing the (SB)n and the (IR(x,y))n, and when receiving (n+1) data (SB)n+1 and the (IR(x,y))n+1, calculating g<~><2>(x)=<((SB)n+1- (SB)n)((IR(x,y))n+1-(IR(x,y))n)>.

A method comprises: generating a first and a second correlated photon beam with wavelengths λ1 and λ2, respectively, wherein preferably λ1≠λ2; separating the first photon beam and the second photon beam; illuminating an object with the first photon beam; generating a third and a fourth correlated photon beam with wavelength λ1 and wavelength λ2, respectively; overlapping the first photon beam with the third photon beam such that photons of wavelength λ1 in either photon beam are indistinguishable; overlapping the second photon beam with the fourth photon beam such that photons of wavelength λ2 in either photon beam are indistinguishable; and using the overlapped photons of wavelength λ2 for imaging and / or spectroscopy of the object such that the photons that illuminate the object are not detected.

The invention relates to a single-photon polarization state quantum imaging system based on a DMD micromirror array. The system comprises a laser transmitting device, a single-photon preparation system, a DMD control imaging device, and an EMCCD imaging receiving system; the laser transmitting device is a semiconductor laser and is used for emitting laser beams; the single-photon preparation system is used for converting the laser emitted by the laser transmitting device into single photon pulses in different polarization states; the MD control imaging device directly acts on the single photonpulses in different polarization states and reflects the single photon pulses to the EMCCD imaging receiving system; the EMCCD imaging receiving system images the single photons in different polarization states, performs statistical analysis on detected photon information, and also obtains an image measurement error rate and imaging reliability. The system is simple in structure, convenient to operate, accurate in measurement, high in feasibility and easy to apply.

A quantum photonic imaging device used in an underwater vehicle for stealthy detection of underwater objects includes a photon generating module that generates an entangled pair of photons that includes a signal photon and an ancilla photon, wherein the ancilla photon is retained within the device; a transmitter that transmits the signal photon towards a region of space for detecting an underwater object; a receiver that detects an incoming photon to the device; and a correlation module that distinguishes the signal photon that is reflected back to the receiver due to a presence of the object from environmental noise photons, wherein the distinguishing includes determining an entanglement correlation of the detected photon with the ancilla photon, and wherein a presence of the entanglement correlation between the detected photon and the ancilla photon indicates that the detected photon is the signal photon reflected back from the object.

The invention discloses a solar-blind ultraviolet single-photon source and a preparation method thereof. The solar-blind ultraviolet single-photon source includes a wide bandgap semiconductor p type layer, an i type intrinsic layer, a single quantum dot and a quantum dot embedded pin nanowire or a quantum dot embedded pin membrane composed of a n type layer. The width of a bandgap of a quantum dotin a pin structure is larger than 4.43 electron volts, the pin structure uses a semiconductor material of which the bandgap width is larger than the quantum dot, and thus a class quantum well structure is formed to enhance limitations on the single quantum dot. The solar-blind ultraviolet single-photon source is suitable for both excitation ways of optical pumping and electric pumping and can emit vertical to a substrate and can also emit parallel to the substrate, and hence the solar-blind ultraviolet single-photon source can be not only applied to a free space single-photon source but alsoapplied to an integrated single-photon source on a chip; the emission wavelength of the solar-blind ultraviolet single-photon source is in a solar-blind wave band smaller than 280 nm, and the wide bandgap quantum dot is suitable for room temperature single-photon emission even for high-temperature single-photon emission and can be broadly applied to the relevant fields of quantum information, quantum calculation, quantum imaging, quantum verification, near field secure communication and quantum precision measurement.

The invention relates to a quantum imaging device and method of entangled photon pair time and position synchronization coincidence. The device comprises an entangled source, a shading screen, a signal photon position measurement branch and an idle photon position measurement branch. The signal photon position measurement branch comprises an imaging lens, a first optical filter, a resolution plateand a first detector which are successively arranged. The first detector is connected to a signal photon position measurement module. The idle photon position measurement branch comprises a second optical filter and a second detector which are successively arranged. The second detector is connected to an idle photon position measurement module. The first detector and the second detector are connected to a time coincidence module. The signal photon position measurement module and the idle photon position measurement module are connected to the time coincidence module and a space coincidence module. The space coincidence module is connected to a photon counting image synthesis module. In the invention, photon collection efficiency is increased and imaging time is shortened.

The invention discloses laser radar based on a highly-correlated quantum imaging principle, which consists of a pulse laser, a parameter down-conversion non-linear device, a receiving lens, a photon detector, an imaging lens, an area-array detector, a time delay correlator and a signal processor. The pulse laser transmits laser pulse to generate two laser beams having different wavelengths and the highly correlation by parameter down-conversion non-linear device, one path of laser beam with long wavelength is irradiated on a measured object and is focused on a photon detector through a receiving lens to detector after being reflected, and a switch signal indicative of the detecting result of the photon is output; the other path of laser beam with short wavelength is irradiated to the area-array detector through an imaging lens to acquire a two-dimension photon image signal; and two paths of signals are correlated and integrated by the signal processor to acquire image and distance information of the measured object. The laser radar effectively solves the problem of transmission loss by using the laser with the long wavelength in an atmosphere window to realize the ultra-long distance detection and realize the super-resolution detection by using the highly-correction effect.

A computational intensity correlation imaging autocollimator and measurement method, comprising: a light source, a digital micromirror array DMD, a controller, a beam splitter, a lens, a mirror of a test piece, a CCD and an intensity correlation calculation module; the synchronization of the controller The control module generates a synchronous clock signal to act on the digital micromirror array DMD and CCD. The intensity correlation calculation module simultaneously records the light field modulation matrix generated by the light field modulation module and the echo signal received by the CCD, and performs second-order intensity correlation calculation. The tiny rotation angle of the DUT is obtained through indirect calculation. The invention introduces the computational correlation imaging method in the quantum imaging technology into the design of the autocollimator, which can effectively reduce the measurement error caused by air disturbance and other factors, and improve the sensitivity and stability of the system.