35 results about "Light intensity" patented technology

The invention provides a fingerprint identification device, which includes detection substrate. several fingerprint detection units are arranged on the detection substrate; the light blocking plate is located on one side of the detection substrate with a fingerprint detection unit, the light blocking plate is provided with an optical communication hole which is in one-to-one correspondence with the fingerprint detection unit; a cover plate is positioned on one side of the light blocking plate facing away from the detection substrate, the cover plate comprises a light-emitting surface facing the light-blocking plate and a touch surface facing away from the light-blocking plate; a light source is positioned on one side of the light blocking plate facing away from the detection substrate andused for emitting light to the cover plate, at least a part of light of the light source can be reflected by the fingerprint on the touch surface of the cover plate to the light hole; Wherein the fingerprint detection unit is used for outputting corresponding electric signals according to the light intensity emitted to the fingerprint detection unit through the corresponding light hole. Correspondingly, the invention also provides fingerprint identification equipment. The invention can increase the distance of fingerprint identification.

The invention relates to a perovskite quantum dot-doped polymer dispersed liquid crystal and a preparation method thereof. The perovskite quantum dot-doped polymer dispersed liquid crystal is preparedfrom the following components, in parts by mass: 1-10 parts of perovskite quantum dots, 20-74 parts of a photosensitive polymer, 20-78 parts of a nematic liquid crystal, and 1-5 parts of a photoinitiator. The obtained perovskite quantum dot-doped polymer dispersed liquid crystal is applied to a random laser. The raw materials of the dispersed liquid crystal are simple and easy to obtain, the costs are low, and the obtained random laser has the characteristics of a short preparation period, a simple preparation process, low production costs, higher emission light intensity and a low thresholdvalue, so that the dispersed liquid crystal has broad application prospects.

A solar photovoltaic power generation based automatic light supplementing and watering system of a greenhouse comprises a remote control center, a control center, a solar module, an LED light supplementing module, a power supply module and a watering module. The solar module, the control center and the LED light supplementing module are connected bidirectionally in sequence; the watering module is connected with the control center; the power supply module is connected with the control center, the solar module and the LED light supplementing module as well as connected with the watering module; the control center is connected with the remote control center through wireless transmission; the solar module, the LED light supplementing module, the watering module and the power supply module are installed on the greenhouse. Watering and light supplementing can be carried out in time according to the humidity and light intensity in the greenhouse, and crops can grow better without keepers.

An optical pickup apparatus has a semiconductor laser source which emits a laser beam in a wavelength band of 405 nm having an elliptic light intensity distribution; a beam shaping element which shapes the light intensity distribution of the laser beam; a polarizing beam splitter having a polarized light separation film in contact with the air and reflecting the laser beam shaped by the beam shaping element on the polarized light separation film; and an objective lens which focuses the laser beam reflected on the polarized light separation film onto an optical information recording medium.

The invention relates to a rotary type crop light-supplementing lamp. The rotary type crop light-supplementing lamp is used for supplementing light for crops and comprises a light source; the rotary type crop light-supplementing lamp further comprises a rotating mechanism, the rotating mechanism can be installed on the light source, and light emitted by the light source can penetrate through the rotating mechanism and then be emitted out; the rotary type crop light-supplementing lamp further comprises a light restraining mechanism, the light restraining mechanism is fixed below the rotating mechanism, and the light restraining mechanism can be used for restraining light beams emitted by the light source and obliquely irradiating the light beams on the ground. According to the rotary type crop light-supplementing lamp in the invention, the rotating mechanism cooperates with the light restraining mechanism, so that greenhouse light-supplementing common light sources such as an LED, a high-pressure sodium lamp, a metal halide lamp and the like are obliquely irradiated to the ground, a light area rotates along with the rotation of the rotating mechanism, and the rotating angular speedof the light area is equal to the rotating angular speed of the rotating mechanism. Compared with the common greenhouse light supplementing mode, the rotary type crop light-supplementing lamp has theadvantages that the illumination coverage area of a single lamp is greatly increased, bright and dark staggered periodic illumination is formed in the coverage area, that is, for the light intensity received by a single plant, a circle of rotation speed is treated as a cycle, and the proportion of an instantaneous illumination area to the total illumination area is the duty ratio.

The invention belongs to the technical field of micronano structures and in particular relates to a laser interference photoetching system. After light splitting, a conventional laser interference photoetching system has unequal light intensities, too many light splitting elements, adjustment difficulties and low system reliability. The invention provides the laser interference photoetching systemwhich comprises a double-beam laser generation component, a plurality of light beam shaping components and a plurality of interference components which are arranged in sequence, wherein the double-beam laser generation component comprises a plurality of light beam generation units; polarizers and Q switches are arranged among the light beam generation units; the light beam shaping components comprise beam expansion collimation units and light beam shaping units which are arranged in sequence; and the interference components comprise light splitting units and polarization state adjustment units. After light splitting, the laser interference photoetching system has equal light intensities, concise light splitting elements, adjustment easiness and high system reliability.

The invention discloses a vehicle-mounted temperature regulation and control method. According to the regulation method, under the conditions that a vehicle travels normally, and a light intensity condition is met, a thin film solar cell and a semiconductor unit commonly generate power based on temperature difference to charge an energy storage device; and in a state that the vehicle is stationary, the energy storage device and the thin film solar cell can supply power to a whole system. Meanwhile, the system can be automatically started/stopped according to the temperature difference between the interior and the exterior of the vehicle; a controller is configured to monitor the capacity of the energy storage device, so as to determine whether a fan and the semiconductor unit work or not; in a state that the vehicle is stationary, the temperature difference between the interior and the exterior of the vehicle exceeds a preset value, the semiconductor unit and the fan start to work for reducing the temperature of the interior of the vehicle; and in a state that the vehicle travels normally, the temperature difference between the interior and the exterior of the vehicle exceeds a certain value, the semiconductor unit can also generate power to charge the energy storage device.

Provided is a weak-light-signal multistage amplifying circuit. The circuit is characterized in that the circuit comprises a photoelectric detector, a prefixed amplifying circuit, a three-stage operation amplifying circuit and a one-stage amplifying detection circuit; the photoelectric detector is connected with the prefixed amplifying circuit, and the prefixed amplifying circuit is connected to the three-stage operation amplifying circuit and the one-stage amplifying detection circuit; after the photoelectric detector receives light signals, electric currents are generated, voltage signals are output after the electric currents go through the prefixed amplifying circuit, and the voltage signals are output to two operational amplifying circuits at the same time, wherein in one circuit, the voltage signals go through the one-stage amplifying detection circuit and output direct-current signals for detecting the direct-current magnitude of light signals, and in the other circuit, the voltage signals go through the three-stage operation amplifying circuit and output voltage pulse signals for detecting light-intensity changes. The weak-light-signal multistage amplifying circuit achieves the accurate measurement of micron-level matter, and can effectively suppress disturbance, improve the signal-to-noise ratio and obtain effective light signals.

The invention relates to a light source excitation device for a geological sample age determination instrument, which comprises a base, a cover plate, a light source control panel, a light source module and an automated route management (ARM) machine, wherein the ARM machine, the cover plate and the light source control panel are fixed on the base by fastening screws; the ARM machine is connectedwith the light source control panel by a connecting line; the light source control panel is connected with the light source module by a light source control line; the cover plate is provided with a detection optical filter; the base is provided with a guide rail, a sample heat insulation piece and a light source cavity; the sample heat insulation piece is positioned at the lower end of the light source cavity; the light source module consists of a module box and an excitation optical filter; and the module box is internally provided with a light-emitting diode and a detection photoelectric triode. The ARM machine can be used for completing the control for the light source excitation device and other functions, so that the light source excitation device is simple in operation, high in degree of automation and accurate in determination data. The light source excitation device for the geological sample age determination instrument is compact in structure, small in size, light in weight as well as convenient to install, replace and carry; and the light intensity of an excitation light source reaches 50-70mW/cm<2> at the place which is 30mm away from the excitation light source.

The embodiment of the invention provides a display device, electronic equipment and a control method of the electronic equipment. The display device comprises a display screen, a dimming assembly which is arranged on one side of the display screen; a first light sensor which is arranged on one side, deviating from the display screen, of the dimming assembly; a second light sensor which is arrangedon one side, deviating from the display screen, of the dimming assembly; wherein the dimming assembly is used for filtering ambient light penetrating through the display screen and light emitted by the display screen, so that the first light sensor receives the light emitted by the display screen, and the second light sensor receives the light emitted by the display screen and the ambient light.Due to the fact that the first light sensor can only receive light emitted by the display screen, and the second light sensor can receive light emitted by the display screen and ambient light, the ambient light intensity can be calculated through the difference between the light received by the first light sensor and the light received by the second light sensor, calculation is simple, and the operand of a software side can be reduced.

The present invention discloses a visible light intensity compensation method. The method comprises: detecting visible light and infrared light in the ambient light, and obtaining the intensity value of the visible light and the intensity value of the infrared light; obtaining the operation values of the intensity value of the visible light and the intensity value of the infrared light; and comparing the operation values with a preset range of threshold, and performing compensation of the intensity value of the visible light according to the comparison result. The present invention further discloses a visible light intensity compensation device and a mobile terminal. According to the invention, the visible light intensity compensation method and device and the mobile terminal can reduce the difference between the intensity value of the visible light after compensation and the standard intensity value of the visible light so as to allow the intensity value of the visible light after compensation to be closely consistent to the standard intensity value of the visible light.

A method for estimating a fly screen effect of an image capture unit is described, having a plurality of image sensors for providing an item of light intensity information. The method includes a step of determining an image property of an item of image information, based on a plurality of items of light intensity information and on a plurality of parameters, each of the plurality of parameters being associated with each of the plurality of image sensors. This method also includes a step of ascertaining a plurality of parameter values for the plurality of parameters, in which the image property is at least made to approximate an ideal image property, the plurality of parameters representing the fly screen effect in a model of the image capture unit.

The invention relates to a measuring device for picosecond time resolution detection of a single photon weak signal. An optical pulse emission controller is connected with a microsecond optical pulseemitter, a picosecond pulse laser mode locker, a condenser, a sample bin, a fluorescence collector, an optical path transmitter, a color separation grating, an optical path aggregator, a light intensity detector, a preamplifier and a signal detection circuit in sequence; and the picosecond pulse laser mode locker is sequentially connected with the signal detection circuit. The measuring method comprises the following steps: an excitation light source emits a light beam to irradiate a sample to reach an electron excited state, and the device detects the time when a single fluorescence photon emitted by the sample reaches a signal detector to obtain the service life of the excited state; in addition, fluorescence emitted by excited state electrons returning to the ground state is fed back tothe light intensity detector through the optical path transmitter and is converted into an emission spectrum signal. According to the invention, the femtosecond oscillation stage is adopted to calibrate the time, and a standard is established for accurately measuring the technical performance of ultra-fast attenuation.

The present invention provides an alcohol-based stable and translucent fragrance composition containing a large amount of perfume. The fragrance composition of the present invention is a composition in which the total amount of (a) silicone oil and (b) α-olefin oligomer that is a hydrogenated trimer, tetramer, pentamer, and/or hexamer of α-olefin having 4 to 12 carbon atoms is 2 to 12% by mass in the composition, and the mass ratio of (b)/(a) is 0.1 to 0.7; the amount of (c) polyether-modified silicone with respect to (b) α-olefin oligomer is 2 to 10 times in mass; the amount of (d) perfume is 3 to 30% by mass in the composition; the amount of (e) lower alcohol having 1 to 4 carbon atoms is 50% by mass or more in the composition; the amount of (f) water is 3.5 to 15% by mass in the composition; and the L value of the composition is 70 to 95 provided the L value is a percentage (%) of strength of a transmitted light compared with a strength of an incident light.

A living body measuring light source system of a living body measurement apparatus outputs light with a power spectrum as measurement light, in which the light intensity of a characteristic bandwidth including a wavelength (a cause of a local small S/N ratio), which is likely to be absorbed in a known light absorption and scattering wavelength characteristic of a measurement-target living body that is a living body as a measurement target, is set to be higher than that of other bandwidths.

The invention discloses an intelligent light adjusting system and an operating method thereof. A vehicle body height and a light height required by the national standard are calculated and then inputinto a vehicle light adjusting controller and a light display instrument; compared with an existing headlamp, the headlamp is internally provided with a vehicle lamp adjusting controller and two adjusting motors; according to signals of light adjusting, the vehicle lamp adjusting controller makes the signals be transmitted to the adjusting motors, and thus the light skewing and light intensity areadjusted; a judgment unit is further needed in the vehicle lamp adjusting controller; after the light adjustment meets the requirement and a vehicle is off the line, manual misoperation occurs, pressing down to adjust 1/2 light is carried, whether the consistency or being within the error range is kept or not is judged according to the parameters of the distance, angles and the like of a lens anda decoration frame when light adjustment meets the requirement, thus whether the signals are transmitted to the adjusting motors or not is judged, next-step work is performed, and at the moment, adjusting bolts are not controlled by light adjustment and are spontaneously judged by the adjusting controller.

The invention discloses an automobile high-beam and low-beam lamp intelligent switching device which comprises a tail lamp, a headlamp, a dimmer switch and a lamplight control switch. A power source is connected with the tail lamp by a tail lamp relay, the tail lamp relay is further connected with the lamplight control switch, one end of the headlamp is connected with the dimmer switch, a headlamprelay is connected with the other end of the headlamp and is further connected with the lamplight control switch, and a wireless communication chip B is further connected with the dimmer switch and is wirelessly connected with a wireless communication chip A. The automobile high-beam and low-beam lamp intelligent switching device has the advantages that high-beam lamps of automobiles can be automatically switched into low-beam lamps by the aid of technologies such as camera image identification, optical coupling relay control, light intensity detection and wireless transmission when the automobiles encounter automobiles running in opposite directions in travel procedures at night, and the automobile high-beam and low-beam lamp intelligent switching device is high in intelligence degree and practicality.

The invention provides a device and a method for measuring diffraction efficiency of a diffraction element. The device comprises an interferometer, a diffraction element and an optical power meter. The optical power meter is used for detecting that the background stray light energy is E0; the optical power meter detects that the total incident light intensity energy entering the diffraction element is E1; the optical power meter detects that the total emergent light intensity energy after being focused by the diffraction element is E2; the diffraction efficiency of the diffraction element is shown as follows. According to the device and the method for measuring the diffraction efficiency of the diffraction element, the characteristic that the diffraction element can converge light is applied, the interferometer equipment is combined, the diffraction efficiency of the whole diffraction element can be obtained through one-time measurement and the test result is more accurate.