558 results about "Light flux" patented technology

A portable device includes a plurality of individually addressable light sources configured to emit light into a plurality of angular bins toward an environment, an imager positioned to receive light reflected from the environment, and a processor configured to analyze one or more images captured from the imager and identify a spatial region corresponding to eyes of an individual in the environment, wherein one or more light sources of the plurality of individually addressable light sources is directed to not emit light or reduce a light flux output in one or more angular bins of the plurality of angular bins corresponding to the spatial region. The portable device may be a phone.

A light emitting system including a light emitting device having electronically controllable light output that can increase or decrease independently within a plurality of angular bins, an imager positioned to capture one or more images of the environment, and one or more processors configured to analyze the one or more images captured from the imager, identify an individual in the environment, identify one or more first angular bins of the plurality of angular bins corresponding to the individual, and direct the light emitting device to increase a light flux output within the one or more first angular bins.

A light emitting system includes at least one light emitting device configurable to emit light into an external environment, a controller configured to adjust a light flux output from the at least one light emitting device, and a non-transitory computer readable storage media comprising a plurality of parameters, the parameters including rules for prioritizing a first illumination mode or first irradiance mode over a second illumination mode or second irradiation mode that direct the at least one light emitting device to emit a first light flux into a first angular bin and a second light flux different from the first light flux into a second angular bin different from the first angular bin.

The invention discloses a flow-type Raman sorting method and a high-luminous-flux flow-type Raman sorting device, and the method comprises the following steps: carrying out coincident focusing on Raman laser and near-infrared laser captured by a light trap to form a Raman excitation detection site, and arranging the Raman excitation detection site at the tip of the outer end of a tail end electrode in a chip dielectric focusing electrode; the photo-thermal oscillation near-infrared laser is focused on a tail end electrode in a dielectric focusing electrode of the chip and does not coincide with a Raman excitation detection site; through switching of light trap capture near-infrared laser and photo-thermal oscillation near-infrared laser, a single cell sample is captured and fixed at a Raman excitation detection site through light trap capture force generated by the light trap capture near-infrared laser or bubbles are generated through a photo-thermal effect generated by the photo-thermal oscillation near-infrared laser; the cell sample adhered to the tail end electrode in the dielectric focusing electrode is oscillated and separated through the bubbles. Compared with the prior art, the device has the beneficial effects that the organic combination of optical trap capture and dielectric capture sample oscillation functions can be realized, the switching is convenient, flexible, rapid, simple and reliable in use, the instrument cost is greatly reduced, the application range of the instrument is effectively widened, and the device has very strong universality.

An LED filament lamp emits lamp light of a third correlated color temperature, CCT3. An LED filament light source emits LED filament light of a first correlated color temperature, CCT1, of a first light intensity, I1, and a first luminous flux, LF1. A transparent envelope at least partly encloses the LED filament light source. A further LED light source provides further LED light of a second correlated color temperature, CCT2, a second light intensity, I2, and a second luminous flux, LF2. The further LED light source provides the further LED light to the envelope. The envelope is a light emitting structure configured to emit the further LED light and to transmit the LED filament light. The lamp light thus comprises one or more of the LED filament light and the further LED light and CCT1≤2500K, 8000K≥CCT2≥3500K and 2≥LF1 / LF2≥0.5, wherein CCT1, CCT2 and LF1 / LF2 are chosen such that 3400K≥CCT3≥2600K.

The invention discloses an optical flux-inductance-energy integrated system and a transmitted waveform design method, and the method comprises the steps: carrying out the MLS modulation and OFDM modulation of an input original signal, obtaining an MLS waveform and an OFDM waveform, carrying out the amplitude distribution of the two waveforms, and combining the two waveforms according to a time sequence to form an MLS-OFDM AC signal; after the alternating current signal is subjected to digital-to-analog conversion, outputting the alternating current signal according to a set driving peak-to-peak value voltage, superposing a direct current component in the alternating current signal so as to carry out alternating current and direct current amplitude distribution, and outputting an analog electric signal; the transmitter converts analog electric signals into optical signals, and the optical signals are simultaneously connected with the information decoding module, the sensing processing module and the energy collecting module. According to the hybrid MLS-OFDM waveform design scheme combining alternating-current amplitude distribution and alternating-current and direct-current amplitude distribution, flexible balance among communication, perception and energy collection performance in an optical flux-inductance-energy integrated system is achieved, the complexity of the system can be reduced, and the system is made to be lighter and more compact.

The utility model discloses an agricultural sun-shading structure which comprises a sun-shading plate arranged on a roof, the roof is of a continuous up-and-down structure, a first supporting seat is arranged at the valley bottom of the roof, and the lower portion of the sun-shading plate is connected with the first supporting seat through a rotating shaft; a second supporting seat is arranged on the peak top of the roof, a winch assembly is arranged on the second supporting seat, the upper portion of the sun shield is connected with the winch assembly on the peak top on one side through a traction rope, and the upper portion of the sun shield is connected with the winch assembly on the peak top on the other side or a balancing weight through a traction rope. According to the agricultural sunshade system, the luminous flux in a room can be adjusted through the arrangement of the sunshade plate capable of being adjusted in a deflection mode, when the sunshade plate is located outside a greenhouse, under the condition that the illumination intensity requirement of plants is met, the sunshade plate can be controlled to shield sunlight so that the plants can be protected against excessive illumination damage, and the service life of the plants is prolonged. And meanwhile, the greenhouse can be cooled by shielding sunlight.

This method for calculating curvature of an arbitrarily defined range of an optical element includes: a step (a) for obtaining a lateral vector s of an element number n representing a local curvature distribution in an arbitrarily defined range of the optical element; and a step (b) for, when an average spherical power in a prescribed light flux range within an arbitrarily defined range is defined as a macro curvature c, calculating the macro curvature c without using wavefront information in the arbitrarily defined range by using a weighting vector w with which an approximate expression of c ≈ wsT is satisfied.

Methods, devices and systems are described that enable improved determination of wavefront errors associated with light traveling through turbulent media, such as through the atmosphere. The described systems use a Rayleigh-Raman polychromatic laser guide star (RRPLGS) to measure the tilt at the wavelength of observation by making use of the dispersion of the refractive index of air and differential tilt measurements at multiple combinations of wavelengths based on the Rayleigh and Raman back-scattered light. The described RRPLGS systems have a number of advantages, including scalability of returned flux and flexibility in selection of short wavelengths, allowing for a combination of multiple tilt measurements, and enabling characterization of the turbulent media without relying on photons from the object of interest.

The invention relates to the technical field of virtual reality optical systems, and discloses an optical system control method for reducing VR dynamic blurring, which comprises the following steps: arranging an independent liquid crystal light valve in a light path of a display panel, and judging the motion state of a user according to the motion angular velocity of the head of the user acquired by an inertial measurement unit; when the display panel is in the static micro-motion state, the light valve is controlled to be continuously opened, and when the display panel is in the dynamic operation state, the light valve is controlled to execute one-time pulse type switching operation in each frame display period, the image generation function and the time domain luminous flux control function are structurally separated, so that the display panel can concentrate on efficient imaging; and meanwhile, the external light valve accurately inhibits dynamic blur, the inherent contradiction between power consumption and brightness in the prior art is effectively avoided, and the environmental adaptability of the system and the comprehensive experience of a user can be remarkably improved through closed-loop self-calibration and multi-sensory cooperative control.

The invention discloses a backlight module preparation method and device. The backlight module preparation method comprises the steps that LED test light bars are arranged according to the model size of a display module; adjusting a driving electrical parameter of the LED test light bar to enable the display of the whole machine to reach a target color point value, and obtaining a first electrical parameter; working current data of a single LED lamp bead is calculated according to the first electrical parameter, and luminous flux and color coordinates of various LED lamp beads are obtained; constructing a colorimetric mixing formula and calculating a white light color point theoretical value of the backlight module; and according to the theoretical value of the white light color point, in combination with the pre-selected wavelength of the blue light chip, the fluorescent powder and the glue type, obtaining the proportion of the fluorescent powder, and preparing the backlight module according to the proportion of the fluorescent powder. The whole machine is tested in advance, and the target color point value of the white light LED device is calculated according to the test data, so that the preparation accuracy of the white light LED device is improved, repeated test verification is avoided, the development period of a liquid crystal display is shortened, and the development cost is effectively reduced.

The utility model relates to the technical field of X-ray tubes, in particular to an X-ray tube with high-stability luminous flux, which comprises a tube shell, a cathode assembly, an anode assembly and a window assembly, and is characterized in that the anode assembly comprises an anode cap, an anode rod and an anode target assembly; the anode cap comprises an expansion part, a partition part and a necking part which are sequentially connected in the axial direction of the anode cap, the expansion part wraps the focusing piece from the bottom and the circumferential direction of the focusing piece, an electron beam incidence hole is formed in the partition part, and a packaging cavity extending in the axial direction and an X-ray outlet penetrating in the radial direction are formed in the necking part; the potential of the anode assembly is higher than that of the cathode assembly; along the axial direction of the X-ray tube, the distance H between the bottom of the focusing part and the top of the expansion part is greater than the distance D1 between the bottom of the focusing part and the partition part, so that stray electrons and secondary electrons generated by the stray electrons and overflow electrons and secondary electrons generated by the overflow electrons are absorbed after repeated back bombardment in the expansion part, and the secondary electrons are completely prevented from bombarding a tube shell, thereby improving the efficiency of the X-ray tube. And the high stability of the X-ray luminous flux is ensured.

According to one aspect of the present invention, a pattern inspection apparatus includes: an imaging sensor including a plurality of first detection elements that detect light flux transmitted through or reflected by a target object illuminated with inspection Light and capture a pattern image of the target object, and a plurality of second detection elements that are arranged adjacent to the plurality of first detection elements, detect Light fluxes obtained by shifting a focus position of the light flux front side and rear side, and capture images for focus adjustment; an adjustment mechanism configured to adjust a focal position of the light flux by using the images for the focus adjustment captured by the plurality of second detection elements; and a comparison circuit configured to compare the pattern image captured by the plurality of first detection elements and a predetermined reference image.

This invention relates to the field of optical imaging and detection technology, specifically providing a broadband snapshot-type polarization interferometry imaging detection system and method for breast tumors. A broadband light source illuminates a breast tumor tissue sample. The reflected signal light is collected and collimated by a pre-optical system, then sequentially passes through a first and a second ray shaping unit for two shearing and two polarization state transformations, resulting in two beams of linearly polarized light and two beams of circularly polarized light. These beams are imaged by an imaging lens to an area array detector to obtain a polarization interferogram, which is then demodulated to obtain all Stokes parameters of the breast tumor tissue sample. This invention achieves broadband snapshot imaging of breast tumors with all Stokes parameters without using an analyzer, doubling the light throughput compared to traditional polarization imaging instruments using analyzers. Furthermore, this invention has advantages such as compact structure, no moving parts, easy assembly and adjustment, and no need for image registration.

The invention discloses a reversed polarity light-emitting diode and a manufacturing method thereof, the reversed polarity light-emitting diode comprises a semiconductor laminated layer, the semiconductor laminated layer is provided with a mesa structure, the mesa structure comprises a top surface and a side wall surface, the reversed polarity light-emitting diode further comprises a side wall Bragg reflector, a light-emitting diode chip and a light-emitting diode chip, the first electrode is arranged on the surface of the side wall of the semiconductor lamination layer; and an under pad Bragg reflector disposed between an N-side electrode on the top surface and the semiconductor stack. By constructing the three-dimensional reflection structure, the problems of side wall light loss and electrode bonding pad shading in the prior art are solved at the same time, and the light extraction efficiency, the total luminous flux and the light emitting uniformity are remarkably improved.

The invention relates to the technical field of property intelligent management, and provides a collaborative optimization intelligent lighting system dynamic energy scheduling method, which comprises the following steps: constructing an energy concentrator network of an intelligent lighting system, abstracting lighting equipment of a plurality of projects into an energy concentrator model, wherein each energy concentrator describes a conversion relation between electric energy and luminous flux through a coupling matrix; a multi-objective optimization function with maximization of the electric energy utilization rate as the core is established, the multi-objective optimization function integrates comfort, equipment and power grid constraints, and dynamic configuration is carried out based on operation parameters of the energy hub network; solving the multi-objective optimization function by adopting a two-stage optimization process, generating a reference operation plan and performing rolling correction; and issuing a dynamic dimming control signal to each lighting terminal through an energy concentrator network based on the optimized scheduling instruction obtained by solving so as to cooperatively schedule the electric energy of the intelligent lighting system. Therefore, the cross-region and multi-project intelligent lighting system is optimized in a collaborative manner, and the energy utilization rate is improved.

The invention discloses a spectral analysis device and method for gas Raman scattering of a hollow-core optical fiber, and belongs to the technical field of gas analysis sensing. The spectrum analysis device comprises a laser, a light beam coupling device, a hollow-core optical fiber gas sample chamber, a collecting device and a spectrograph which are sequentially arranged along a light path, the light beam coupling device is used for coupling excitation laser generated by the laser into the hollow-core optical fiber gas sample chamber; to-be-detected gas flows in the hollow-core optical fiber gas sample chamber, excitation laser is conducted, and a transmission light beam containing the excitation laser and Raman scattering light is output; the collecting device is used for separating excitation laser in the transmission light beam and outputting a light beam only containing Raman scattering; a small round hole is formed in an inlet of the spectrograph, spatial filtering is carried out, and the luminous flux lost when a light beam enters the spectrograph is reduced; and the spectrometer receives the Raman scattering to obtain the Raman spectrum of the gas to be detected. The luminous flux lost when the light enters the spectrograph is reduced, the light beam collection efficiency is improved, and the signal-to-noise ratio and the analysis sensitivity are improved.

The invention discloses a pupil adaptive red light regulation and control method and system based on EC film and light source collaboration, and the method comprises the steps: obtaining a visible light image of the eyes of a user through an image collection module, and extracting a real-time pupil state parameter through an image processing module; meanwhile, the ambient light sensing module obtains ambient light intensity data. The cooperative control unit receives the parameters and generates a luminous flux control instruction set containing a first control instruction and a second control instruction based on a safety evaluation model. The first control instruction drives the electrochromic film assembly to change the light transmittance of the red light, and the second control instruction adjusts the luminous intensity of the red light source. Through cooperative control of optical attenuation of the electrochromic film and luminous intensity of the light source, the luminous flux entering the retina can be accurately regulated and controlled in real time according to dynamic changes of pupils, the problem of potential retina light damage risk caused by using a light source with fixed intensity is effectively solved, and the safety of red light irradiation application is remarkably improved.

The invention discloses a near BBL curve LED white light color mixing method, system and lamp, a first color temperature light source and a second color temperature light source are selected in a preset color coordinate area, and a color point range is determined for each of the first color temperature light source and the second color temperature light source based on calculation of an intermediate color temperature point light source color deviation value extreme value on a target light mixing path; and selecting the first color temperature light source and the second color temperature light source of which the color coordinates are located in the corresponding color point range, and adjusting the luminous flux output proportion of the two light sources for light mixing so as to form intermediate color temperature light. The problems that a multi-CCT light and color modulation product adopts two light sources, the color temperature and color tolerance between the two light sources cannot meet the requirements of customers, and the color deviation value of the light sources obviously deviates from a BBL curve are solved.

The invention discloses a photoacoustic imaging method and a photoacoustic imaging system, and the method comprises the steps: transmitting laser to an imaging target, and receiving a photoacoustic signal returned by the imaging target; determining the light intensity of the laser, and determining the absorption coefficient of the skin layer of the imaging target according to the photoacoustic signal and the light intensity of the laser; obtaining a luminous flux distribution result corresponding to the absorption coefficient of the skin layer, wherein the luminous flux distribution result is used for representing luminous flux distribution conditions of the biological tissue under different imaging depths; acquiring photoacoustic image data of the imaging target; compensating the photoacoustic image data based on the luminous flux distribution result to obtain compensated photoacoustic image data; and generating a photoacoustic image according to the compensated photoacoustic image data. The photoacoustic data is compensated according to the luminous flux distribution result corresponding to the absorption coefficient of the skin layer, and the quality and precision of the photoacoustic image can be improved.

The invention discloses a coding LED illumination light source and an active hyperspectral imaging system, and effectively overcomes the defects of insufficient luminous flux and low signal-to-noise ratio in the current active hyperspectral imaging system based on the LED illumination light source. The system comprises an LED control module, an LED light-emitting module, a heat dissipation module, a focusing and dodging module, an imaging lens, an image detector, a computer and the like. The method is characterized in that coding illumination is carried out through a plurality of LEDs with different wavelength combinations based on a spectrum calculation principle, the illumination intensity of the active hyperspectral imaging system is multiplied, and the signal-to-noise ratio and the sampling speed of the system are improved. The invention provides a novel active hyperspectral imaging mode which can effectively meet the application requirements in different scenes such as high-resolution microscopic hyperspectral imaging and video-level high-speed hyperspectral imaging.

A light scanning apparatus according to the present disclosure includes a deflecting unit configured to deflect a light flux from a light source to scan a surface in a main scanning direction, and a first optical system configured to guide the light flux deflected by the deflecting unit to the surface to be scanned, in which a width of the light flux immediately before being incident on a first deflecting surface of the deflecting unit is smaller than a width of the first deflecting surface in a main scanning cross section, and only a part of the light flux incident on the deflecting unit is deflected toward the surface to be scanned by the first deflecting surface when the first deflecting surface is at a first angle in the main scanning cross section.

The invention provides a luminaire (1000) comprising an elongated housing (1040) having an elongated light exit window (1050), and a plurality of LED light sources (100) arranged to emit light through the elongated light exit window (1050). The elongated light exit window (1050) comprises a curved section (130) having a central elongation line, CL, extending along a section path length, PL, the curved section (130) being arranged to provide a section light output (140), the curved section (130) having a section shape comprising multiple bends (135) arranged on opposite sides of a section axis SA. The curved section (130) consists of multiple subsections (131), each subsection (131) comprising a subset of the plurality of LED light sources (100). Each subsection (131) of the multiple subsections (131) has a subsection shape with a subsection orientation angle θn and / or a subsection distance Dn to the section axis SA, the subsection orientation angle θn being determined as the angle between the central elongation line CL of the subsection and the section axis SA, the subsection distance Dn being the distance of the central elongation line CL of the subsection measured perpendicular to the section axis SA. Each subsection (131) is arranged to provide a subsection light output (141) having a subsection luminous flux Φn and a subsection angular light distribution. At least one of the subsection luminous flux Φn and the subsection angular light distribution depends on at least one of the subsection orientation angle θn and the subsection distance Dn, so that the section light output varies along the section path length PL.

A light emitting device includes a plurality of light sources, each light source emits light flux output that exits the light emitting device in a different angular bin toward an environment, and at least one light sensor positioned to receive light from the plurality of light sources reflected from one or more spatial zones in the environment at different time periods. The light emitting device adjusts a first light flux output in a plurality of angular bins based at least in part on an analysis by a processor of information received by the light sensor such that the first light flux output illuminates at least a portion of one or more pathways for movement of an individual and illuminates a spatial zone in a form of an image, video, logo, indicia, or graphic.

The invention discloses an ultrafast and high-sensitivity gas detection device and method based on gas nonlinear optics. The device comprises a high-power laser light source module, a light flux cell and a signal processing module. The light flux cell is of an integrated hollow structure, a high-reflectivity mirror face is arranged in the light flux cell to form a closed light path, laser enters the cell through an incidence hole at a certain incidence angle, 50-meter-level long-optical-path accumulation is achieved through multiple times of reflection, and the nonlinear effect excitation threshold value is effectively reduced. The light spot path is changed by adjusting the incident angle, the signal intensity is obviously enhanced by combining the nonlinear effect, and the detection limit reaches ppb level. The signal processing module extracts a target frequency component through phase-locked amplification, separates frequency domain aliasing signals in combination with wavelet transform, and reconstructs a complete nonlinear spectrum through Fourier transform. The device has the advantages of stable structure, high sensitivity, strong interference resistance and the like, and is suitable for environment trace gas monitoring and volatile organic compound early warning.

The invention discloses a large-view-field space detection optical lens. The large-view-field space detection optical lens comprises a front lens group, a diaphragm, a rear lens group and an image surface which are sequentially arranged from an object side surface to an image side surface, the front lens group filters incident light waves and forms an intermediate image; the diaphragm controls the luminous flux by adjusting the relative aperture of the diaphragm; the rear lens group amplifies the intermediate image, corrects aberration and performs optical imaging through an image surface; the front lens group comprises a first optical filter, a first negative meniscus lens, a first biconvex lens and a second biconvex lens which are sequentially arranged from a position far away from the diaphragm to a position close to the diaphragm; and the rear lens group comprises a first biconcave lens, a third biconvex lens, a fourth biconvex lens, a first positive meniscus lens, a second negative meniscus lens, a second positive meniscus lens, a third negative meniscus lens and a second optical filter which are sequentially arranged from the diaphragm to the image plane. The optical lens provided by the invention has the characteristics of circular light spot, large view field, low chromatic aberration, low distortion, high resolution and small form deviation of light spots in each view field.

The present application relates to the technical field of LED chip, and discloses a flip LED lamp bead and a preparation method thereof.The flip LED lamp bead comprises a support, an LED chip arranged on the support and a fluorescent glue layer; the support comprises a horizontally arranged substrate, the substrate is provided with a groove structure for placing the LED chip, the side wall of the groove structure and / or the bottom surface close to the side wall are provided with a welding material, and the welding point of the LED chip is arranged at the end edge of the LED chip; and the welding point of the LED chip is electrically connected with the substrate through the welding material.The present application can increase the welding area of the LED chip, reduce the risk of false welding, reduce the shielding of the light emitting surface of the LED chip, reduce the loss of the luminous flux of the LED lamp bead, and improve the luminous brightness and reliability of the LED lamp bead.

An optical element includes a first face having a first reflecting region where a part of a light flux incident from a predetermined direction is reflected in a first direction, and a first non-optical region where the light flux is not incident, a second face having a second reflecting region where another part of the light flux incident from the predetermined direction is reflected in a second direction different from the first direction, and a third face connecting the first non-optical region and the second reflecting region. The first non-optical region and the third face form an acute angle outside the optical element. The second reflecting region and the third face form an acute angle inside the optical element.

An apparatus including: a deflector deflecting a light flux from a light source to scan a surface in a main scanning direction; and an imaging optical system including first and second optical elements, and guiding the light flux deflected by the deflector to the surface. When sagittal shapes of an incident surface and an exit surface of each of the first and second optical elements are represented by the following equations:x=z2 / r′1+(1-(z / r′)2)1 / 2+∑n=18∑m=01⁢6Mm⁢n⁢ym⁢znr′=r⁡(1+∑i=11⁢6Ei⁢yi)in at least one of incident surface or exit surface of first optical element and each of incident surface and exit surface of second optical element, at least one of values of Mmn is not equal to 0 provided that m is not equal to 0, and incident surface and exit surface of second optical element have M01 of the same sign.

The invention relates to a lamp maintenance method and device, an illumination control system and a lamp. The method comprises the steps of collecting environmental parameters of a lamp, predicting the degradation trend of a light source and an optical lens of the lamp according to a preset period based on the environmental parameters, obtaining a total luminous flux prediction result, determining a health index of the lamp according to the total luminous flux prediction result, and triggering lamp maintenance operation matched with the health index based on the health index. By adopting the method, the degradation speed of the lamp performance can be effectively delayed, the overall service life of the lamp is prolonged, and the intelligent, refined and sustainable operation and maintenance level of an illumination system is comprehensively improved on the premise that the illumination quality and safety are guaranteed.