79 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.

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 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.

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.

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 F_t (steady-state level of chlorophyll fluorescence in light adapted cells); ii) decrease in F_m, (maximal saturating light induced fluorescence level in light adapted cells); and iii) decrease in ΔF/F_m′=(F_m′−F_t)/F_m′ (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.

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 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.

The invention provides a wavelength selection method and a communication device. The method is applied to the fields of optical communication, optical switching, digital center networks, microwave photonics, liquid crystal antennas, optical phased arrays, beam forming, beam scanning, laser radars, laser projection, laser televisions, holographic display, adaptive optics, laser beam shaping, laser processing, ultrafast laser pulse shaping, laser active imaging, optical tomography, retina imaging and the like. And under the condition that the port of the WSS device is switched, only the image data of the changed local image in the LCOS image is updated by taking the time interval smaller than the duration of one frame of image as a unit, and the driving voltage of the pixels on the LCOS display screen is refreshed according to the priority. Compared with refreshing the image data of the whole LCOS image according to the frame frequency and refreshing the driving voltage of the pixels according to the fixed sequence of the pixel numbers, the port switching of the WSS device can be accelerated.

The invention discloses a self-adaptive optical system stable closed-loop control method, which comprises the processes of stray light detection, slope filtering, recovery operation, control operation and the like, and realizes stable closed-loop control under the stray light interference condition through stray light identification, judgment processing and slope filtering processing. According to the self-adaptive optical system stable closed-loop control method, the existing conditions in the adaptive optical system are utilized, no extra equipment needs to be added, the implementation is simple, the adaptability and the stability of the adaptive optical system are improved, and the application field of the adaptive optical system is expanded.

The invention discloses a method for preparing non-contact glasses for correcting aberration of human eyes through wave optics. The method comprises the following specific steps that the aberrations of all orders are measured, wavefront correction is carried out, imaging is carried out, wavefront measurement is carried out, adaptive optical control is carried out, parameters corresponding to lenses are designed, and the non-contact glasses are prepared. In this way, according to the method for preparing the non-contact glasses for correcting the aberration of the human eyes through wave optics, the parameters corresponding to the lenses are designed according to corneal topography, the degrees are coaxially, evenly and gradually decreased from the optical centers of lens surfaces to the outer edges, a pixel-level clear zooming function is achieved, the standard of light path whole vision field adaptive human eye physiological light paths is met, meanwhile, based on the wave optics theory, light penetrating through the lenses is adjusted to the optimal angle according to corresponding parameters of the corneas to enter the pupils, images rarely distort, the images can be formed on the retinas accurately and truly, the glasses are suitable for being used by various groups, and the method is suitable for being applied and popularized.