82 results about "Light-adapted" patented technology

A personal identification device and method prevent the reduction in the finger vein recognition rate which otherwise occur due to erroneous insertion of a finger by a user not accustomed to operation or insertion of a false finger at low cost. The device includes an imager picking up an image of a finger vein pattern, a light source emitting light adapted to be transmitted through the finger, an image operating unit matches the image, guides indicating the position of picking up the finger image, a detector detecting the contact between the finger and the guides, another light source radiating light reflected from the thick of the finger, a switch which is depressed by the forward end of the finger, a further light source emitting light transmitted through the forward end of the finger, and a light-sensor receiving the light from the further light source through the finger.

An adaptive optics scanning system using a beam projection module with four or more axes of motion that can project and control the position and angle of a beam of light to or from an adaptive optics element. The adaptive optics scanning system is compact in size, overcoming the challenges of a traditional lens and mirror based pupil relay design. The adaptive optics scanning system has little to no dispersion, chromatic aberration, and off-axis aberration for improved optical performance. The system and methods for calibrating and optimizing the system are described. A modular adaptive optics unit that scans and interfaces an adaptive optics element is described.

A miniature, battery operated plastic module designed to project at least three different frequencies of energy from light emitting diodes is described. A first frequency is between 390 nm-420 nm just above harmful Ultraviolet Frequencies, a second frequency is between 850 nm-1200 nm in the infrared band and a third frequency is for a visible white light. The light emitting module has a base unit, the unit including a pulsed LED that emits an ultraviolet wavelength of light adapted to focus on a surface having phosphorescence means on the surface to activate the phosphorescence. The light emitting module may also have a base unit which includes a pulsed LED that emits an infrared wavelength of light adapted to penetrate a particular atmosphere. The module may also provide optional power for external items in addition to the three frequencies.

A system for diagnostically evaluating the health of tissue within the fundus of an eye includes a f s laser source, an adaptive optical assembly, an imaging unit, and a computer. The adaptive optical assembly focuses a laser beam to a focal point in the fundus of the eye, and scans the fundus tissue according to a predetermined scanning pattern. Illumination of anisotropic tissue within the fundus, such as the photoreceptors and the Henle-fiber layer, induces a Second Harmonic Generation (SHG) response. Red photons, with a wavelength (λ) of about 880 nm, are converted to blue photons, with a wavelength of λ / 2, through the process of photon conversion. An imaging unit senses the blue photon return light, and uses the return light to generate an image of the fundus. The computer processes the image, and compares it to a template of healthy tissue to evaluate the health of the imaged tissue.

The present invention relates to an adaptive optics sensor intended for simultaneous detection of several wave fronts on a common camera target. The sensor is intended for use in connection with multi-conjugate adaptive optics (MCAO), where several wave front measurements are needed at the same time. The sensor includes a spatial filter taking out signals resulting from parasitic reflections of the reference sources and from unwanted parts of the object.

An interior sidewall panel assembly for a passenger aircraft includes a generally planar sidewall structural panel having a D-shaped window opening with an apex that is directed rearward and tilted slightly upward relative to the horizontal, a window assembly disposed in the window opening, an indirect lighting module disposed at a forward edge of the D-shaped window assembly and arranged to direct light forwardly such that the light washes onto a rear margin of a structural panel of a next adjacent panel assembly located immediately forward of the light module, and a kick panel disposed at a lower margin of the structural panel that incorporates cabin ventilation or decompression ducts and vents and an accent light adapted to direct light onto a cabin floor of the aircraft.

A method, apparatus, and computer program product are provided for optimising the pulse shape of optical signals output from an optical transmitter. The optical transmitter includes an optical modulator controlled by a bias voltage and a signal drive level, wherein the bias voltage and signal drive level are controlled automatically in a systematic way in dependence on one another to adapt the pulse shape of an optical output signal for optimal transmission over a transmission line.

The invention relates to a measurement system and a method for detecting ocular fundus blood flow velocity with high resolution. The measurement system is characterized in that a bacon light source is focused on the fundus by a human eye through a plurality of optical components to form a bacon spot; the spot is transformed into parallel light through the eye after backward reflection, and reaches a wavefront sensor through a wavefront phase corrector and a series of optical components to realize the process of self adaptive aberration correction; the imaging light source is focused on the front focus of the eye through the optical components, and is collimated by the eye into the parallel light to illuminate the retinal vascular microcirculation system; a laser speckle interferometry is formed on the surfaces of the fundus blood vessels illuminated; the interference field enters into wavefront phase corrector through the optical components and is reflected and finally focused on a photodetector through the series of optical components; a light speckle imaging process is realized. The measurement method has the advantage of enabling the whole system to overcome negative influences from the aberration of human eyes on capturing laser speckle interference field images, thus facilitating to obtain fundus velocity graph of high precision and resolution.

The invention relates to a spatial moment based line structured light center extraction method and belongs to the field of laser light ray center extraction methods in the visual and three-dimensional measurement of line structured light. According to the method, an ideal normal equation for a place where an edge point is located is obtained through the gray-level gradient vector of the edge point of a light ray, and one direction, closest to an ideal normal direction, of eight directions of a bisect coordinate system serves as an actual normal direction of a light ray curve, so that a light ray section passing through the actual normal of the edge point and the light ray is obtained. According to the method, an adopted light ray section selection method can better adapt to the drastic change of light ray curvature and can guarantee that pixel points in the light ray section are distributed uniformly, and a closed analytic formula for solving the coordinate of a light ray center point based on spatial moment theory is given and established. According to the method, when a phenomenon that the gray level of the center of the light ray is saturated occurs, serious detection errors cannot appear, so that the aspects, such as the timeliness and accuracy of detection results and the robustness to errors, surpass those of the traditional methods.

The invention relates to the adaptive optical field, in particular to a liquid crystal adaptive optical system with low energy loss and covering white-light wave band, which adopts an open-loop adaptive light path and substitutes the common polaroid with a PBS beam splitter. The PBS beam splitter splits the incoming ray into two rays of P polarization and S polarization, in which P ray is completely used for the wavefront detection and S ray is completely used for correction and imaging. Before the correction, the S ray is divided into 3 to 4 sub-bands by using color-separation plates; 3 to 4 liquid crystal correctors are correspondingly arranged to perform wavefront correction; the corrected 3 to 4 sub-beams are combined into one imaging beam. The invention uses the PBS beam splitter to substitute the common polaroids, doubling the efficiency of energy utilization in the liquid crystal adaptive optical system. With a plurality of pure-phase liquid crystal wavefront correctors, the invention enables the spectrum of imaging beam can cover white-light wave bands to become the liquid crystal adaptive optical system with efficient utilization of optical energy.

The invention provides a light source optimization method for an adaptive photoetching system. The aims of optimizing a light source graph, improving the imaging property of the photoetching system and reducing the light source complexity as much as possible are achieved. The light source optimization method adopts a sequential least squares estimation method; the current light source graph is updated by adopting observation point data in a key region in each iteration; after all observation points are traversed, the light source graph is subjected to cyclic regularization by a reverse order recursive least squares estimation method. According to the method, if newly increased observation point data are acquired after light source optimization is finished, the current light source optimization result can be directly corrected, and a light source does not need to be re-optimized; meanwhile, the light source optimization method can realize parallel processing of illumination cross coefficient matrix calculation and light source optimization; furthermore, the complexity of the light source can be reduced, and the imaging quality of the photoetching system is improved or retained as much as possible; finally, with the adoption of a vector imaging model, a simulation precision requirement of a high-NA photoetching system can be met.

An illumination device includes a substrate including a fluorescent layer, and capable of rotating around a predetermined rotary shaft, a light source adapted to emit an excitation light adapted to excite the fluorescent layer, and a control device adapted to control emission of the light source so that, when the substrate is rotating, a first area of the fluorescent layer is irradiated with the excitation light in one round, and at least a part of the first area is not irradiated with the excitation light in another round.

A light adapted to be used with a fish landing net includes an LED illuminator, a base member structured to hold the LED, and a switch for connecting or disconnecting a circuit to the LED, where the base member is attachable to the fish landing net. A net light may have a switch disposed locally to the illuminator. The net may be collapsible. A net frame member may have a reflective tape or reflective coating surface opposed to the illuminator. The net may have reflective surfaces containing fluorescent pigment, optical filtering, in a pattern that replicates a fish-friendly environment, and / or in a pattern having a two-dimensional or three-dimensional spatial arrangement. A method includes adjusting or setting a light emission for avoiding scaring-away of fish. A method may include changing brightness of the illuminator. A method may include providing a positionable illuminator for changing a direction of the illumination pattern.

A micro-machined mirror optical crossbar switch directs the light beams of input signal channels to selected output channels by manipulating the focal lengths of adaptive optical elements to ensure that the light beam of any given incoming channel is always focused at the position of the reflective device that is selected to switch that beam. This allows the reflective device to be smaller and switch faster and allows the number of output channels per input channel to be increased.

The invention discloses a pixel structure of a retina-like image sensor, relates to the field of integrated circuits, and solves the problems that an event is mismatched with a corresponding timestampand a motion artifact is generated due to the fact that the existing method adopts asynchronous real-time detection of light intensity change for each pixel and adopts an AER event reading mode and time delay is easy to generate. , Aand that false events are easily generated due to the influence of the leakage current of the transistor and cannot be removed, and the like. The A self-adaptive light sensing unit is used for completing conversion from a light signal to an electric signal and outputting a voltage signal; athe sampling comparison unit is used for completing sampling and comparisonfunctions to determine the signal polarity, generating an OFF signal when the light intensity becomes weak and sending an ON signal when the light intensity becomes strong; the asignal processing unit stores the polarity signal output by the sampling comparison unit and performs signal processing according to an instruction to complete noise reduction.; Aaccording to the structure disclosed in the invention, motion artifacts are eliminated, an asynchronous reading mode of a traditional dynamic vision sensor is abandoned, and a grayscale image can be output while an event is output.

A spectacles-type image display device comprises an image output unit for outputting image light of images to be displayed and a reflection unit disposed in a field of view of at least one eyeball of a viewer. The reflection unit is adapted to reflect the image light output from the image output unit toward the eyeball of the viewer so that the viewer can see virtual images of the images. The minimum value of a width of a projection cross-section of the reflection unit in an output direction of the image light to the eyeball is smaller than a dark-adapted pupil diameter of human and is larger than a light-adapted pupil diameter of human.

The invention discloses a thermally driven deformable micromirror, and belongs to the technical field of adaptive optical systems. The micro-mirror is composed of a lens, an electrode, a supporting beam and a silicon structure frame. The lens is suspended and supported in the center of the silicon structure frame by the support beam; the lens is divided into three layers from top to bottom, namely, a metal reflecting layer, a silicon dioxide layer and a silicon layer; the supporting beam and the silicon layer of the lens are integrally formed by the same material, the silicon structural frameand the supporting beams are insulated by the silicon dioxide layer, the electrode is arranged on the surface of the silicon structural frame and connected with the supporting beam, after the electrode is powered on, the supporting beam and the lens form a current loop and emit heat, and the lens deforms due to different thermal expansion coefficients of metal and silicon. The heating temperaturesof two different materials, namely metal and silicon, are controlled by electrifying, so that the purpose of mirror surface deformation is achieved.

The present invention relates to an emergency assistance beacon signal methodology for law enforcement, emergency and military personnel by which such personnel who encounter an imminent need for assistance or rescue while on duty in a vehicle, may utilize such methodology to invite the assistance or rescue of other such personnel. Upon a first personnel determining that assistance or rescue is needed, the first personnel activate a powerful light element attached to a such that the powerful light directs a beam of light upwardly and non-horizontally from the vehicle. Upon a second personnel recognizing the beam of light, travels to a general area of the beam of light to locate the first and provides first personnel assistance or rescue. In another embodiment of the present invention, an emergency assistance beacon signal system includes a) a roof-mountable emergency signal device for mounting on the roof of a law enforcement, emergency or military vehicle, the device including an upwardly, non-horizontally directed powerful light source having at least one upwardly, non-horizontally directed beam of light adapted to be energized by an activation mechanism operable by a personnel who is using the vehicle; and, b) the activation mechanism in proximity to and operable by the officer who is using the vehicle.

The invention discloses a coherence optical time domain reflectometer measuring method. The coherence optical time domain reflectometer measuring method is characterized in that test pulsed light is used for acquiring scattering / reflecting information of a device to be measured, local pulsed light and scattered / reflected light signals are used for interference, the scattered / reflected light signals are integrally constructed by adjusting the repetition frequency of the test pulsed light and the repetition frequency of the local pulsed light, the scattering / reflecting light position information is acquired through photovoltaic conversion and analog-digital conversion, the pulse width of the test pulsed light and the pulse width of the local pulsed light adapt to the needed space resolution, and the distance between the adjacent pulses is far larger than the pulse width. A coherence optical time domain reflectometer in which the method is adopted is characterized by comprising a laser, a light beam splitter, a pair of pulse generation devices, a light circulator and a photoelectric detector, the ultrahigh space resolution and the scattering / reflecting light position information can be automatically acquired at the same time, and expensive high-speed photoelectric detectors and expensive high-speed analog-digital converters are not needed.

A quantum interference device includes a base having a mounting surface, an atom cell in which alkali metal atoms are encapsulated, a light source adapted to emit light adapted to excite the alkali metal atoms, a photodetector adapted to detect the light having been transmitted through the atom cell, and a support adapted to support the atom cell, the light source, and the photodetector in a lump with respect to the mounting surface in a state in which the atom cell, the light source, and the photodetector are arranged in a direction along the mounting surface.

In situ fluorescence method to monitor state of sulfur-deprived algal culture's ability to produce H2 under sulfur depletion, comprising: a) providing sulfur-deprived algal culture; b) illuminating culture; c) measuring onset of H2 percentage in produced gas phase at multiple times to ascertain point immediately after anerobiosis to obtain H2 data as function of time; and d) determining any abrupt change in three in situ fluorescence parameters; i) increase in Ft (steady-state level of chlorophyll fluorescence in light adapted cells); ii) decrease in Fm, (maximal saturating light induced fluorescence level in light adapted cells); and iii) decrease in ΔF / Fm′=(Fm′−Ft) / Fm′ (calculated photochemical activity of photosystem II (PSII) signaling full reduction of plastoquinone pool between PSII and PSI, which indicates start of anaerobic conditions that induces synthesis of hydrogenase enzyme for subsequent H2 production that signal oxidation of plastoquinone pool asmain factor to regulate H2 under sulfur depletion.

An interior sidewall panel assembly for a passenger aircraft includes a generally planar sidewall structural panel having a D-shaped window opening with an apex that is directed rearward and tilted slightly upward relative to the horizontal, a window assembly disposed in the window opening, an indirect lighting module disposed at a forward edge of the D-shaped window assembly and arranged to direct light forwardly such that the light washes onto a rear margin of a structural panel of a next adjacent panel assembly located immediately forward of the light module, and a kick panel disposed at a lower margin of the structural panel that incorporates cabin ventilation or decompression ducts and vents and an accent light adapted to direct light onto a cabin floor of the aircraft.

The invention relates to the field of consumable life monitoring, and especially relates to a method for recording the life of a consumable. The method for recording the life of the consumable comprises the following steps: A, arranging a photochromic unit on a consumable to be recorded; B, controlling a light emitting unit to emit incident lights adapting to the life consumption condition of theconsumable to be recorded to the photochromic unit; C, using a light receiving unit to receive incident light reflected lights reflected by the photochromic unit; and D, calculating the reflectivity of the photochromic unit according to the incident lights emitted by the light emitting unit and the reflected lights received by the light receiving unit to correspondingly obtain the life of the consumable to be recorded in order to realize the consumable life recording. The method has the advantages of realization of recording the life of the consumable, simple structure, easiness in installation, simplicity in use, low cost, and wide application range.

The invention discloses a self-adaptive optical simulation dynamic wavefront correction device. The device comprises a receiving antenna, and the receiving antenna is sequentially provided with a collimating mirror, a beam expanding system and a beam splitting prism along a light path, wherein the beam splitting prism is provided with a wavefront corrector along a reflection light path, the beam splitting prism is sequentially provided with a beam shrinking system and a wavefront sensor along a refraction light path, and the wavefront corrector is connected with a computer. The invention alsodiscloses a correction method of the self-adaptive optical simulation dynamic wavefront correction device, and the method and device are high in application practicability.

A light activation system is provided for automatically illuminating a compartment in an automobile. The system comprises a light adapted to illuminate the compartment, a lighting circuit that activates and deactivates the light, and a distance sensor, electrically coupled to the lighting circuit, and adapted to cause the light to be activated when a person is within a predetermined distance from the compartment. A method is also provided for automatically illuminating a compartment in an automobile having a light that is adapted to illuminate the compartment, and a lighting circuit that activates and deactivates the light. The method comprises the step of activating the light when a person is within a predetermined distance from the compartment using a distance sensor that is electrically coupled to the lighting circuit.

The invention discloses a high-speed adaptive optical closed-loop control method based on a far field, and the method employs a device which consists of a far-field collection module, a far-field-to-wavefront restoration module, a high-voltage amplifier, and a wavefront corrector module, and the far-field collection module records the change process of a far-field image in real time. The wavefrontrestoration module restores wavefront according to the far-field light intensity distribution of the current frame and the far-field light intensity distribution of the previous frame, and drives thehigh-voltage amplifier to control the wavefront corrector to correct the phase difference in the light path according to the wavefront information obtained by restoration. Single far-field light intensity distribution is adopted for closed-loop control, additional far-field information such as far-field light spot distribution on an out-of-focus surface does not need to be added, the light path structure can be simplified, and meanwhile the light energy utilization rate is increased; the phase of the incident wavefront can be determined according to the far fields of the front frame and the rear frame, and particularly, aberration data can be accurately obtained under the condition of less self-adaptive optical correction or smaller input aberration, so that the aberration can be quicklyand accurately corrected, and the real-time performance is stronger.

An afocal sensor assembly detects a light beam with an aberrated wavefront. The afocal sensor assembly is configured to provide sorted four-dimensional (4D) light field information regarding the light beam, for example, via one or more plenoptic images. Based on the 4D light field information, a lossy reconstruction of an aberrated wavefront for one or more actuators of an adaptive optics (AO) device is performed. The AO device can be controlled based on the lossy reconstruction to correct the wavefront of the light beam. In some embodiments, the aberrated wavefront is due to passage of the light beam through atmospheric turbulence, and the lossy reconstruction and correction using the AO device is performed in less than 1.0 ms. The lossy reconstruction of the aberrated wavefront can have a phase accuracy in a range of λ / 2 to λ / 30.

The invention discloses a self-adaptive light field imaging calibration method and device and a storage medium. The method comprises the steps: acquiring global video data shot by a global camera in each module, wherein the modules comprise one global camera and at least one local camera, determining a spatial information distribution diagram according to the global video data, determining parameter information of each local camera in the module according to the spatial information distribution diagram, calculating a mapping grid between images of the global camera and the local cameras, and calibrating the local cameras to the corresponding global cameras. A new module is designed for realization, and the interiors of all the modules are designed in a graded manner, so that in light fieldcalibration, the interior of each module can be calibrated firstly, and then all the modules are integrally calibrated. Through a two-stage calibration mode, the complexity of light field calibrationis reduced, and the robustness and parallelism are improved.