204 results about "Colour centre" patented technology

The invention discloses a diamond-based NV ^‑ A nanoscale three-dimensional magnetic resonance molecular imaging device for color centers, comprising: a glass base; a laser, arranged inside the glass base, for emitting laser light to the outside; containing NV ^‑ The diamond with the color center is arranged on the upper surface of the glass base, and the laser emitted by the laser is directly irradiated to the diamond; the microwave pulser is used to input microwave pulses to the diamond; the microscope objective lens is used to make the NV of the diamond ^‑ Fluorescence from the color center is emitted outward through the microscope objective; a monochromatic filter for filtering the NV of the diamond ^‑ Fluorescence from color centers; nanoconvex lenses that filter the NV of the diamond ^‑ The fluorescence emitted by the color center is further concentrated; the distributed optical imaging lens is used to realize the imaging function; the packaging device is used to realize the functions of stable temperature, electromagnetic shielding and isolation protection.

The invention discloses a microwave sensor based on an NV color center diamond. A diamond internally containing a Nitrogen-Vacancy color center is adopted as a sensitive element, electronic energy level stimulation is achieved through lasers, an additionally-arranged static magnetic field is scanned, and the microwave frequency and the microwave intensity are measured through fluorescence intensity detection. Dependency of electronic rabi-flopping of the NV color center in the diamond on the external microwave magnetic field is brought into play, high theoretical accuracy and good stability are achieved, the microwave sensor has the advantages of being small in size, low in cost, high in accuracy, large in temperature range, simple in operation condition and the like and rotates on the basis of solid atoms, and the microwave sensor can serve in all the fields with the requirements for the low-cost high-accuracy microwave frequency and intensity detection in the future.

The invention concerns a method for the hyperpolarisation of ¹³C nuclear spin in a diamond, comprising an optical pumping step, in which colour centre electron spins in the diamond are optically pumped. The method further comprises a transfer step in which the polarisation of a long-lived state of the colour centre electron spins is transferred to ¹³C nuclear spins in the diamond via a long-range interaction.

The present invention relates generally to a center high mounted stop lamp for a vehicle, such as a four- or two or three-wheeled motor vehicle, which makes a vehicle behind aware of its approach to a vehicle ahead in accordance with an actuation of the latter's brake system. In particular, it relates to a multifunctional multiple color center high mounted stop lamp for mounting in the interior or exterior of the vehicle, which includes multiple light emitting diodes (LEDs) configured to emit different colors through a single optical lens. This present invention enhances the safety of the vehicle by combining the advantages of a center high mounted stop lamp with the advantages of a hazard warning/signaling device. Combining these advantages into the multifunctional multiple color center high mounted stop lamp cooperate to increase overall vehicle safety and creates a synergistic effect.

The method of the invention includes that a spin triplet state electronic ground state based on a diamond NV color center uses the diamond NV color center as a sensitive component under different magnetic field conditions, and the NV color center is excited by the laser 532 nm; the NV color center emits fluorescence through external microwave, and further, an ODMR spectrum is obtained. Three pairsof distinct Zeeman split peaks can be extracted from the spectrum, and the resonance frequency difference between each pair of peaks is measured. The three different frequency differences come from three different NV directions, and the magnitudes of the three frequency differences are proportional to the magnetic field strength along projections of three symmetry axes in the NV color center, andthe three orientations is sufficient to extract three components of the magnetic field, which is the total field strength in this state. The measured weak magnetic field of the magnetized permalloy is obtained by subtracting the known magnetic field from the total field strength. Furthermore, the detection of the weak magnetic field of the local spin triplet state electronic ground state based onthe diamond NV color center is realized.

Novel biological labels are disclosed herein. The label comprises a functionalized heterodiamondoid functioning as a biological probe, the probe having an affinity for a target analyte molecule. Upon absorption of incident excitation radiation, color center(s) located within the heterodiamondoid are caused to luminesce. The photoemitted light may be detected and analyzed to yield information about the analyte. The color centers in the heterodiamondoid will typically comprise nitrogen-vacancy and/or nitrogen-pore complexes, but may also comprise a dopant impurity atom such as a rare earth or transition metal element.

The invention is a character extracting method in complex background color image based on runlength adjacency graph, which belongs to character extracting field in preprocess of color image character identification. All color connection sections are acquired with CRAG (color run-length adjacency graph) region growing algorithm after the digital color image is acquired, then the color average is carried on with color classification, acquires several color centers, forms different color layers with the color centers, then the color connection regions accordant to connection region differentiation rule are distributed onto several color layers. Finally the character is selected out through character analysis and size consistency differentiation, and acquires the character image. The method has a high speed and accuracy.

The invention discloses a chip-level diamond NV-color center magnetic imaging device and method, and the method achieves the hyperfine magnetic field imaging of the two-dimensional surface of an object, such as a magnetic image of a biological cell. The method comprises the steps: carrying out the polarization of a laser pulse and a microwave pulse; generating fluorescent light generated at the NV-color center of a diamond in an external magnetic field; employing the laser pulse to generate fluorescent light again, wherein the difference result of fluorescent light of two times can reflect the magnetic field intensity of the NV-color center, thereby achieving the conversion of magnetic field information to optical information; and employing a nano-level convex lens group and a distributed optical imaging unit to convert an optical signal into an electric signal. The invention also relates to a packaging method for enabling a whole system to be packaged in a manner of chip level, and the method comprises temperature control and electromagnetic shielding. The method is great in value in the fields of biomedical research and medical diagnosis.

The invention discloses an ODMR functional part integrated diamond NV magnetometer and a manufacturing technology thereof, and belongs to the fields of solid state atom magnetometers and micro nano processing. A block-shaped diamond prepared with an NV color center ensemble is edged and shaped into a step-shaped diamond, a multi-layer medium combined reflective film is prepared in the upper surface of the diamond in a film growth technology, a multi-layer medium combined cutoff filtering film is prepared in the bottom, the two types of optical functional films wrap a diamond medium to form a light tripping structure, an annular microwave antenna is prepared on the light tripping structure with the diamond as the main body, a light through hole is cut, a laser diode and a photodiode are microfabricated, and the integrated NV magnetometer is realized. The total light tripping cavity structure and system modulation photon collecting functional parts are designed by taking the diamond as the core, the sensitivity of the solid atom magnetometer can be maximized, and the size of the device is reduced.

The PbO-free UV-absorbing glass is made under oxidative conditions and has a composition, in % by weight, of: SiO₂, 55-79; B₂O₃, 3-25; Al₂O₃, 0-10; Li₂O, 0-10; Na₂O, 0-10; K₂O, 0-10; MgO, 0-2; CaO, 0-3; SrO, 0-3; BaO, 0-3; ZnO, 0-3; ZrO₂, 0-3; CeO₂, 0-1; Fe₂O₃, 0-1; WO₃, 0-3; Bi₂O₃, 0-3; MoO₃, 0-3; ΣLiO+Na₂O+K₂O=0.5 to 16 and ΣMgO+CaO+SrO+BaO+ZnO=0-10. It also contains from 0.1 to 10% TiO₂ with at least 95% of the titanium as Ti⁺⁴ so that it has a high visible transmission, reduced color centers, and a sharp UV absorption edge. It is especially useful in lamps display devices and glass-to-metal seals.

The invention discloses an inertia measurement device and method based on a diamond NV color center under a high magnetic field. The method adopts a diamond material containing a high-concentration nitrogen-vacancy (NV) color center as a sensitive element, laser and the about 500 gauss of high magnetic field are used for achieving the polarization of nuclear angular momentum, and pulse laser and pulse microwave are used for achieving the operation, control and detection of the diamond NV color center, thereby achieving the measurement of inertial rotation. Compared with the inertial rotation measurement by using electron spin, the measurement sensitivity is significantly improved through nuclear polarization, it is of great value for the development of an inertial measurement system basedon a quantum theory, and the device serves for various fields in the future, especially for civil miniaturized inertial navigation and attitude determination systems.

The invention relates to the technical field of current sensors, and provides an optical fiber current transformer based on a diamond NV color center and a measuring method. The optical fiber current transformer comprises laser excitation and reflected light receiving analysis equipment, a diamond NV color center probe, a magnetic concentrator and microwave excitation equipment, wherein the transformer adopts three measurement methods, namely an all-optical measurement method, a non-all-optical measurement method and a combined measurement method. The optical fiber current transformer is simple in structure, high in practicability, capable of resisting external interference and high in robustness, the optical fiber is only used for transmission of exciting light and collection of fluorescent light, thus bending and twisting of the optical fiber do not affect a detection result to a certain extent, and the use is more convenient; in addition, by optimizing the NV color center concentration and the spinning property in the diamond, the sensitivity of magnetic field measurement can be remarkably improved, and the possibility is provided for current measurement with higher precision.

The invention belongs to the field of optical experiment platform instruments and particularly relates to an efficient diamond NV (nitrogen-vacancy) color center fluorescence collection device. The efficient diamond NV color center fluorescence collection device mainly comprises an experiment platform, a high integration density exciting and acquiring module and a controller, wherein the high integration density exciting and acquiring module is installed on the experiment platform, laser radiates on a diamond after going into a laser incidence port of a reflection prism through an objective lens, a microwave antenna emits microwave for excitation, the reflection prism constantly reflects, and the fluorescence is finally reflected and radiates on a fluorescence acquiring photodiode through an optical filter, and is finally transmitted to a mainframe to be processed. The transparent antenna is used to integrate a PCB and a flexible aligning clamping method is matched, the diamond is accurately installed and located, the transparent packaging antenna is used to efficiently excite, the internal reflection of the internal pyramid-shape reflection prism is used to basically irradiate the fluorescence on the fluorescence acquiring photodiode to efficiently acquire the fluorescence, and the efficient diamond NV color center fluorescence collection device has the advantages of scientific design, reasonable structure, high locating accuracy and modularization.

The invention relates to an NV color center gyro fluorescence collection system and in particular relates to a high-efficiency fluorescence detection device based on a solid-state spin system. The device comprises a 532 laser machine, wherein a polarizing film, a first convex lens, an acoustic optical modulator, a second convex lens and a fourth convex lens are sequentially arranged on a light path of the 532 laser machine; the fourth convex lens is directly opposite to a diamond; the diamond is arranged on a filter; the lower side of the filter is in contact with a photodiode; a prism reflector is arranged on the filter; the photodiode is connected with a lock-in amplifier; the lock-in amplifier is respectively connected with a PID (Proportion Integration Differentiation) controller and an acquisition card; the output end of the PID controller is connected with a microwave source; a signal source output end is respectively connected with the lock-in amplifier and the microwave source; and a radio frequency antenna is connected to the microwave source. According to the device disclosed by the invention, fluorescence side band collection is realized, the traditional confocal measurement method is replaced, the improved system structure is greatly simplified, the collection efficiency is greatly improved, and the device is very suitable for miniaturized installation and lays a foundation for later system integration.

There is to provide an optical element fabrication method including the steps of forming a thin film onto a substrate, and eliminating a color center produced in the forming step by giving energy to the substrate.

The invention discloses a magnetic imaging device and imaging method based on a diamond NV color center and a Kerr effect. A spinning control light source module provides a beam of incident laser, theincident laser passes through a dichroscope system and irradiates the NV color center of the diamond probe after being focused by the microscope objective lens, and fluorescence generated by the NV color center returns to the dichroscope system through the microscope objective lens and enters the fluorescence detection module. The polarized light generation module generates polarized light, the polarized light enters the microscope objective lens through transmission and/or reflection of the dichroscope system and then irradiates a sample placed on the displacement table, and after the polarized light is reflected by the sample, part of the polarized light enters the microscope objective lens again and then enters the polarized light detection and imaging module through the dichroscope system. Through the compatible design, high-resolution, global and large-view imaging of the sample is realized.

The invention discloses an Er<3+>/Yb<3+> co-doped yttrium lithium fluoride monocrystal and a preparation method thereof. The yttrium lithium fluoride monocrystal is a rare earth ion Er<3+>/Yb<3+> co-doped monocrystal; the molecular formula is LiY(1-x-y)ErxYbyF4, wherein x is greater than or equal to 0.008 and less than or equal to 0.085, and y is greater than or equal to 0.002 and less than or equal to 0.170; the segregation coefficients of Yb<3+> and Er<3+> in the yttrium lithium fluoride are about 1, and efficient intermediate infrared laser of 2.7 microns can be output; and the yttrium lithium fluoride monocrystal has high transmittance of intermediate infrared laser, has better thermal, mechanical and chemical stabilities than those of glass state materials and has the characteristics of low phonon energy, high optical transmittance of wavebands with width of 300-5500nm, less color center forming amount, low thermal lens effect and the like, thereby being more easily processed and more suitably used in laser devices. In the preparation method disclosed by the invention, a sealing crucible falling technology is used, so that the operation is simple; the raw material is fluorated at high temperature in a sealed water-free and oxygen-free environment, so that the crystal is isolated from air and water vapor during the growth; and therefore, the high-quality Er<3+>/Yb<3+> co-doped LiYF4 monocrystal containing little OH<-> ion and oxide is obtained.

A positive photo resist is provided on a surface of a photo mask blank. Light is then exposed onto the photo resist to form a predetermined pattern of unexposed and exposed portions in the photo-resist. After development, the exposed portions are removed and ions are implanted to obtain a modulated ion density in the photo mask blank. The implanted ions become color centers which absorb a specific wavelength of light and the modulated distribution of the color substrates create the grayscale photo mask. The photo resist structure is finally removed to produce a grayscale photo mask.

A method of achieving heightened quantum efficiencies and extended photocathode lifetimes is provided that includes using an electron beam bombardment to activate color centers in a CsBr film of a photocathode, and using a laser source for pumping electrons in the color centers of the photocathode.

The present invention is a method for assessment of color processing mechanism in the human brain using cerebral blood flow velocity monitoring, specifically transcranial Doppler ultrasound. The method including steps of transluminating color discs from a light source of a specific color temperature, which act on the visual pathways and color centers to alter mean blood flow velocity in the cerebral arteries. The mean flow velocity is analyzed and using Fourier computation to calculate spectral density estimates. Opponent mechanism in the cortical and subcortical regions determined as opposing tendency for short wavelength versus medium wavelength or for medium wavelength versus long wavelength colors. The method is applied for diagnosis, and treatment of variety of conditions.