205 results about "Laser illumination" patented technology

The invention discloses an indoor water tank sediment starting speed measurement system and method, and aims to solve the technical problem that data accuracy is affected due to the fact that a sensor disturbs a flow field in an existing measurement method. The core of the technical scheme is that the non-contact measurement characteristic of the PIV technology is applied to the whole process from flow field construction to data acquisition. The device is mainly composed of an imaging unit, a laser lighting unit, a movable sliding frame, a water flow adjusting unit and a buffer plate. Optical measurement is carried out through the imaging unit and the laser illumination unit, a physical sensor does not need to be arranged in a flow field, and interference of a measuring instrument on a water flow structure and a sediment starting process is fundamentally avoided. The movable sliding frame which is integrally designed integrates the functions of sediment laying, particle throwing and measuring, so that a test area can be quickly positioned; and the buffer plate and the water inlet and drainage adjusting unit are combined, so that a gradually-changed flow field from weak to strong can be accurately and stably simulated.

The invention relates to a related light measuring device based on a bevel mirror and a control method, and solves the problem that the existing three-dimensional detection technology is insufficient in comprehensive adaptability and cannot meet the requirements of precision detection for stability, precision and data collaboration, and the related light measuring device comprises a laser emission head, a double-bevel mirror, a light path receiving module, a zoom camera and a circuit processing unit. The first bevel mirror is provided with a through hole for laser to directly irradiate a target; the light path receiving module receives and reflects the laser-to-electric signal; the second bevel mirror reflects the target and the light spot light to the camera to obtain visual information; and the circuit processing unit controls all the components, integrates laser and visual information, and realizes three-dimensional detection of the target. The method has the following effects: through the light path collaborative design of the double-bevel mirror, precise and synchronous acquisition of laser ranging signals and visual contour / light spot information is realized, so that high-precision three-dimensional detection of the distance, the flatness and the segment difference of a target object is efficiently completed.

The application discloses an indoor water tank sediment starting speed measurement system and method, and aims at solving the technical problem of sensor disturbance to a flow field and influence on data accuracy in the prior art measurement method.The technical scheme core is that the non-contact measurement characteristics of the PIV technology are applied to the whole process from flow field construction to data acquisition.The device is mainly composed of an imaging unit, a laser illumination unit, a movable sliding frame, a water flow adjusting unit and a buffer plate.Optical measurement is performed through the imaging unit and the laser illumination unit, and physical sensors do not need to be arranged in the flow field, so that the interference of the measuring instrument on the water flow structure and the sediment starting process is fundamentally avoided.The integrated movable sliding frame integrates the sediment laying, particle throwing and measurement functions, and is convenient for quickly positioning a test area;in combination with the buffer plate and the water inlet and drainage adjusting unit, a gradually changing flow field from weak to strong can be accurately and stably simulated.

A laser beam expanding lighting device comprises an incident laser adjusting module, an adjustable base module and a beam expanding lens set module, a parallel light beam injection port and a plane mirror are installed in the incident laser adjusting module, and after collimation, a laser mirror is transmitted to a beam expanding lens set after being reflected by the two adjustable plane mirrors; the beam expanding lens group realizes the adjustment of the beam expanding angle and the beam expanding multiple by combining different beam expanding lenses and adjusting the distance between the beam expanding lenses; the beam expanding lens set is installed on the adjustable base, the adjustable base achieves deviation of the axis of the beam expanding lens set in two directions relative to the axis of laser through an ejector pin-spring linkage mechanism, the irradiation position of the laser on the beam expanding lens is changed, and adjustment of a laser illumination area is achieved while beam expanding is conducted. The parallel light beam injection port and the beam expanding lens group of the device can be arranged in a non-coaxial mode, the application range is wide, the overall structure is compact, operation is convenient, and various adjusting adaptability is achieved.

The invention discloses an active oxygen activated near-infrared region photo-thermal reagent and a preparation method and application thereof.The near-infrared region photo-thermal reagent with active oxygen response is constructed by means of etherification reaction of phenolic hydroxyl functionalized aza-BODIPY dye and p-bromophenylboronic acid pinacol ester and further prepared into nanoparticles, and the near-infrared region photo-thermal reagent with the active oxygen response function is prepared into the active oxygen activated near-infrared region photo-thermal reagent. After the nano particle reacts with active oxygen, the photo-thermal efficiency of the nano particle is remarkably improved under 808nm laser illumination, and the nano particle has an excellent photo-thermal imaging effect and a photo-thermal treatment function.

The invention discloses a light source device and laser lighting equipment. The light source device comprises a laser module, a collimation module and a guide module. The collimation module is arranged on a light path where the first light beam and the second light beam generated by the laser module are located and used for generating a first collimated light beam and a second collimated light beam, and the included angle between the second collimated light beam and the first collimated light beam is larger than 0 degree. The guiding module is arranged on the light path where at least one of the first collimated light beam and the second collimated light beam is located and used for changing the propagation direction of the collimated light beams entering the guiding module so that the first collimated light beam and the second collimated light beam can be propagated in the same direction. Due to the existence of the guiding module, the two collimated light beams can be almost parallel to each other or coincide with each other, two light spots corresponding to the two collimated light beams can be smoothly combined into one light spot, and the light source device can be smoothly applied to laser lighting equipment.

This invention discloses an all-weather reconnaissance and alarm device, comprising a laser illumination component, an ICCD / ICMOS gating component, and an integrated processor. The laser illumination component uses high peak power pulsed laser light for illumination assistance, enhancing target brightness. The ICCD / ICMOS gating component is used to achieve high-gain photoelectric conversion of weak optical signals. Specifically, the ICCD / ICMOS gating component eliminates or reduces the influence of sunlight through "ultrafast adaptive imaging + light decay," enabling the component to operate in the linear region with the optimal signal-to-noise ratio for the target. Simultaneously, the ICCD / ICMOS gating component integrates a high-speed CCD / CMOS image sensor. Without changing the delay time, a higher image intensifier repetition frequency results in a smaller increase in delay time. Through ultra-high-speed image acquisition, it fully utilizes the energy of each laser pulse, enabling imaging of targets at different distances and high-speed moving targets. The integrated processing component focuses on controlling the ultrafast adaptive adjustment duration, the interval between auxiliary illumination and gating opening, and high-precision gain control.

The application discloses an optical device, a laser lighting device and a vehicle, and belongs to the technical field of lasers, and comprises a fluorescent powder sheet, a reflector and a lens; the fluorescent powder sheet, the reflector and the lens are coaxially arranged along a transmission direction of a laser beam; a side of the lens facing the fluorescent powder sheet is provided with a groove, the reflector is arranged at the bottom of the groove, and the fluorescent powder sheet is arranged at a notch position of the groove; the direction of a light-receiving surface of the fluorescent powder sheet and the direction of a light-reflecting surface of the reflector are opposite to the transmission direction of the laser beam; the fluorescent powder sheet is used for emitting excited light under irradiation of the laser beam; the reflector is used for reflecting the laser beam or the excited light through the light-reflecting surface; and the lens is used for changing the direction of the excited light to form a high-beam lighting spot or a low-beam lighting spot. When the fluorescent powder sheet is broken or falls off, the laser beam is directly irradiated on the light-reflecting surface of the reflector, direct irradiation of the laser beam out of the lens to cause harm to human eyes can be avoided, and the use safety of the optical device is improved.

The application relates to the technical field of laser lighting, in particular to a non-electric manual laser switch and a using method thereof, and aims to solve the problems of poor explosion-proof performance, high laser leakage risk, large coupling loss and stray light interference of an existing laser switch. The switch is connected in series between a light fiber at a light emitting end of a laser and a light fiber at a receiving end of a lighting system, and comprises a manual operating mechanism, a double-lens assembly, a high-precision positioning pin, a light cone assembly, a stray light protection piece and a shell. The switch realizes light path on-off through pure mechanical manual operation. When the switch is turned on, the double lens is accurately aligned through the positioning pin, and laser is coupled and transmitted with low loss. When the switch is turned off, the light cone absorbs laser on the laser side, and the stray light protection piece blocks external stray light. The switch does not have any electrical components, meets the Exd IIC T6 explosion-proof grade, has a coupling loss of less than or equal to 0.2 dB, has laser leakage of less than or equal to 0.01 mW when turned off, is suitable for environments of-40 DEG C to 85 DEG C, and is suitable for explosion-proof scenes such as natural gas pipe corridors and chemical industrial parks. The switch is convenient to operate and has a long service life.

Disclosed is a system and method for solid-state 2D optical phased arrays (OPAs), which are fabricated from InGaN / AlGaN multiple quantum wells (MQWs) and AlyGa1-yN / AlxGa1-xN (y<x) MQWs. The InGaN / AlGaN MQWs and AlyGa1-yN / AlxGa1-xN (y<x) MQWs include alternating p-type and n-type layers to form p-n-p-n MQW structures to allow the OPA to operate in the reversed biased configuration to further minimize the operating current and heat generation. The phase in each pixel within the OPA will be controlled independently via electro-optic effect in III-nitride MQWs by varying the voltage in each pixel by a Si CMOS array to achieve the manipulation of the distribution of optical power in the far field and steering of the main laser beam. The present disclosure is applicable to a wide range of applications, including the operation of LIDAR systems, laser weapons, laser illuminators, and laser imaging systems.

The defect inspection device (100) includes: an excitation unit (1); a laser illuminator (2); an interference unit (30); a imaging unit (31); a holding member (4) that holds the imaging unit so as to be able to be disposed at a position separated from an inspection object (90) by a predetermined distance; a connection member (5) that connects the holding member or the imaging unit to the excitation unit; and a control unit (6) that generates an image (61) of the propagation of elastic waves with respect to the inspection object.

The embodiment of the application provides a kind of fingerprint sensor and its manufacturing method, electronic equipment, it is related to display technical field.The fingerprint sensor includes TFT circuit layer and flexible substrate;Light shielding layer, light shielding layer is set to the side of TFT circuit layer close to flexible substrate.This scheme is by setting light shielding layer in fingerprint sensor, and light shielding layer is set to the side of TFT circuit layer close to flexible substrate, can block the laser illumination from the direction of flexible substrate, reduce the photo-generated carrier effect caused by laser illumination, to reduce the leakage current of TFT, improve its electrical properties, to a certain extent, improve the signal quality and working reliability of fingerprint sensor.

Laser light module (31) for a motor vehicle headlight (10) comprising a laser (18), a converter (22) arranged in the beam path of a laser radiation (30) emanating from the laser, which converter scatters part of the incident laser radiation from the laser and converts part of it into secondary radiation with a wavelength longer than that of the laser radiation, a detector (40) arranged in a beam path of radiation emanating from the converter and which generates a measured value as an actual value dependent on the amount of radiation emanating from the converter and incident on the detector, and a control unit (26) which compares the actual value with a target value and controls the laser depending on the comparison of the actual value with the target value, characterized in that the laser light module has a light deflection unit (20) with which different sub-areas (22.a, 22.1, 22.b) of the converter can be illuminated with laser radiation separately from each other in time and wherein the detector records sub-area-specific actual values ​​for different sub-areas and wherein the control unit is set up, in particular programmed, to determine the target value for a first sub-area as a function of an actual value that has been determined for a different sub-area.

The invention discloses a tape casting preparation method of multi-layer fluorescent microcrystalline glass based on in-situ compounding, and belongs to the technical field of functional glass ceramic composite material preparation. The method aims at solving the problems that in a traditional lamination process, the interface bonding force is weak, layering is prone to occurring, and the optical performance is damaged, the core step of the method is a one-step composite forming process after gradient drying and in-situ tape casting, and a prepared multi-layer fluorescent microcrystal composite green body is subjected to programmed glue discharging and co-sintering treatment; the multi-layer fluorescent microcrystalline glass with a compact interface and good optical performance is successfully obtained. Through the in-situ tape casting composite technology, tight combination between interface layers is achieved, interface pores and light scattering centers are effectively reduced, the mechanical strength, thermal stability, fluorescence luminous efficiency and uniformity of the material are remarkably improved, and the material is suitable for advanced photoelectric devices for full-spectrum healthy lighting, high-power LEDs, laser lighting and the like.

An apparatus for generating a defined laser illumination (12) on a work plane (14) has a laser light source (20) that generates a raw laser beam (22). An optical assembly (24) receives the raw laser beam (22) and shapes it into an illumination beam (26) along an optical axis (40). The illumination beam (26) defines a beam direction (28) that intersects the work plane (14). The illumination beam (26) has a beam profile (42; 42') in a region of the work plane (14) that has a major axis (44) perpendicular to the beam direction (28) with a major axis beam width and a minor axis (46) with a minor axis beam width. The optical assembly (24) includes a beam transformer (30) with an exit aperture, a first set of optical elements (56, 60, 62, 64) for beam shaping on the major axis, and a second set of optical elements (34, 36, 38) for beam shaping on the minor axis. The beam transformer (30) widens the raw laser beam (22) on the major axis to generate a widened raw laser beam. The first set of optical elements (56, 60, 62, 64) includes a homogenizer (56) that homogenizes the widened raw laser beam on the major axis. The second set of optical elements (34, 36, 38) includes at least one lens (38) that images the exit aperture of the beam transformer (30) into the work plane. The first set of optical elements (56, 60, 62, 64) generates an intermediate image (66) behind the homogenizer (56) and further implements an imaging optical unit that images the intermediate image (66) into the work plane (14).

This application provides a dynamic tool setting device and method for diamond micro-end milling cutters, relating to the field of precision and ultra-precision machining technology. The method includes the following steps: acquiring a time-series pulse sequence of time-division multiplexing images; and performing tool setting detection on the diamond micro-end milling cutter based on the time-series pulses. This application utilizes the diffraction interference imaging principle of diamond micro-end milling cutters under coaxial laser illumination, employing object-side telecentric vision imaging to ensure a fixed holographic image magnification and microscopic imaging accuracy. By setting the camera trigger acquisition pulse through an external trigger controller via a host computer, the rotating image of the diamond micro-end milling cutter is sampled in a time-division multiplexing manner, achieving full-contour holographic imaging of the diamond micro-end milling cutter under rotating conditions. Simultaneously, by designing a downsampling holographic autofocus algorithm in holographic image processing, the computational load for image holographic reconstruction is reduced, accelerating the tool setting calculation efficiency and providing high-precision tool setting technology support for ultra-precision micro-milling.

A non-sintering technique is used to prepare a fluorescent thin film for laser lighting. This fluorescent film comprises a 0.5–2 mm thick aluminum substrate with a visible light reflectance greater than 95%, and a 100–500 μm thick emitting layer on the aluminum substrate. The emitting layer is obtained by mixing a fluorescent material and a fixative at 40–80 °C using a non-sintering technique. Under blue light excitation at 450 nm, the light emitted by the emitting layer mixes with unabsorbed blue light to produce white light with a color temperature range of 3000 K–4500 K and an Ra value of 90–98. The fluorescent thin film for laser lighting prepared by this invention has a simple overall structure and a convenient preparation process; the nitride red fluorescent material is not sintered, thus greatly preserving its luminescent properties; and the preparation process does not use water, which would decompose the nitride red fluorescent material; the fluorescent film is directly coupled to a highly thermally conductive aluminum plate, thereby enabling the fluorescent film to be used in laser lighting.

The invention discloses a laser illumination and imaging lens group for a shadow imaging system, the laser illumination and imaging lens group comprises an illumination lens and an imaging lens, the illumination lens shapes a Gaussian beam into a flat-topped beam, and the flat-topped beam uniformly irradiates an object to be observed; the imaging lens images the target area to obtain a shadow contour image of the observed object. The illumination lens comprises a first lens with negative focal power and a second lens with positive focal power, and the first lens and the second lens are both aspheric lenses. The imaging lens comprises a front lens group, an aperture diaphragm and a rear lens group, the front lens group comprises a third lens, a fourth lens, a seventh lens and an eighth lens with positive focal power, and a fifth lens and a sixth lens with negative focal power, and the rear lens group comprises a ninth lens with negative focal power and a tenth lens with positive focal power. And all the lenses are spherical lenses. While the collimation and dodging effects of the laser beams are ensured, the system also has the advantages of long working distance, high resolution and the like, can meet the observation requirements of a non-luminous high-speed small-size moving object, and expands the application field of a shadow imaging system.

The invention belongs to the field related to information security and identity authentication, and particularly relates to a reconfigurable optical PUF (Physical Unclonable Function) based on a photorefractive effect and an authentication system and method thereof, the reconfigurable optical PUF has the stable cross-linked structure characteristic of a solid optical PUF, and a reconfiguration principle based on refractive index modulation of the photorefractive effect is fused. On the basis, the authentication method and system of the reconfigurable optical PUF based on the photorefractive effect are constructed; in the system, two paths of laser illumination PUF (Physical Unclonable Function) of detection and pumping are coupled from a light path structure by adopting a coupling device, an arranged laser power regulation module can regulate the power of the pumping laser, control the total energy of pumping photons injected into the optical PUF, excite a carrier self-built field to modulate the carrier self-built field or other polar molecules, and control the light path of the optical PUF. Therefore, the scattering characteristic of the optical PUF can be dynamically reconstructed in a controllable state. The PUF is illuminated by detection laser to form speckles to generate a key for identity authentication. The method has the advantages of high safety, high reliability and the like, and is suitable for the field with high safety requirements.

Methods for laser-assisted repositioning of a micro-object and for culturing an attachment-dependent biological cell within a microfluidic device are described herein. Laser illumination is used to controllably create a bubble which repositions the micro-object. Further, methods of culturing an attachment-dependent biological cell are described, where the methods may include laser-assisted repositioning.

The present invention provides a cordierite crystal-doped tellurite fluorescent glass, its preparation method, and application, belonging to the field of white light laser lighting technology. The fluorescent glass raw materials of the present invention include rare earth phosphor and precursor glass powder. The precursor glass powder raw materials include 60-70% TeO2, 10-20% ZnO, 10-20% Na2O, and 0-10% Al2O3. The rare earth phosphor, calculated as a percentage by mass of the precursor glass powder, includes 0-12% yttrium aluminum garnet phosphor and 0-5% cordierite crystal. The precursor glass powder raw materials are mixed and ground uniformly, then melted and cast to obtain the precursor glass powder. The precursor glass powder is then mixed uniformly with the yttrium aluminum garnet phosphor and cordierite crystals, melted a second time, solidified, and annealed to obtain the precursor glass powder. The tellurite fluorescent glass of the present invention exhibits efficient luminescence while retaining the ductility of traditional glass, exhibits good thermal stability, and has a simple production process.

This application discloses a marine detection device and control method. The marine detection device can be installed on the bottom of unmanned surface vessels (USVs) and other underwater vehicles. During the detection of a real target, the central optical axis of the laser illumination device is kept aligned with the central optical axis of the camera on the seabed, and the laser illumination device is controlled to illuminate the target with a large light output size. After identifying the target element in the detection image, a tracking mode is activated. On the one hand, the central optical axes of both the laser illumination device and the camera are kept aligned with the real target; on the other hand, the laser illumination device is controlled to illuminate the real target with a smaller light output size, and the camera is controlled to adjust its focus to capture a close-up shot of the real target. This application allows for accurate illumination of a large area during detection, facilitating the discovery of the real target through the detection image; during tracking, it facilitates clearer observation of the real target.

The application belongs to the technical field of laser illumination, and particularly relates to a laser illumination system for an LCOS display platform. The system comprises, in sequence from an LD light source illumination system to a lens, a first diffusion sheet, a collimation module, a uniform light module, a third mirror, a relay lens module, a metal wire grid, a retardation sheet, an LCOS chip and a polariscope. The collimation module comprises, in sequence, a double-face fly eye, a first collimation lens, a first mirror, a second diffusion sheet, a second mirror and a second collimation lens, which are installed between the diffusion sheet and the uniform light module. The laser illumination system provided by the application sets the collimation module and the uniform light module, and further improves the utilization rate of the laser light source and the display effect by optimizing the optical design and the beam shaping technology, so that the display quality and the user experience can be significantly improved.

The invention relates to the technical field of laser illumination, in particular to a laser diode agricultural illumination system and method based on a combined spectrum, and the system comprises a light source module, an illumination intensity adjustment module, an illumination time control module, a spectrum monitoring module and a feedback adjustment module. According to light quality requirements of leaf vegetables and solanaceous crops in different growth stages, a spectrum combination proportion is determined, a specific wavelength spectrum is supplemented, illumination intensity is dynamically adjusted according to a plant growth state, illumination time is set according to crop types and growth stages, the spectrum is monitored in real time, optimal parameters are compared, and a spectrum combination is adjusted according to deviation. Spectrum, light intensity and illumination time are accurately matched with crop requirements, light energy waste is reduced, it is guaranteed that crops obtain proper illumination conditions in all growth stages, photosynthesis efficiency is promoted to be improved, and efficient and accurate development of agricultural production is promoted.

The present application relates to the technical field of image processing, in particular to a kind of real-time optical tracking method and system of moving target based on passive guidance.The approximate coordinates of moving target are obtained by passive direction finding station;And according to the approximate coordinates, control laser illumination unit to light moving target body, utilize binocular camera unit to carry out image acquisition and visual analysis to moving target, to obtain the position change of moving target;Combining the position change of moving target, determine the trajectory pose of moving target.Using call camera unit, the whole tracking of moving target is carried out, and the flight state of moving target collected is transmitted to host computer in real time for display.The present application realizes real-time positioning of moving target by the fusion mode of passive direction finding station and binocular optical system, realizes real-time accurate positioning of moving target in the case of building, vegetation dense and low visibility.

The utility model discloses an astronaut modeling light device, which belongs to the related technical field of laser illumination and comprises a stainless steel plastic spraying shell, curved glass, a reflecting mirror, an electric holder, a cooling fan and a laser transmitter. The reflecting mirror and the electric holder are located at the head position of the stainless steel plastic spraying shell, laser emitted by the laser emitter is reflected to the curved glass through the reflecting mirror, the laser emitter is arranged in the stainless steel plastic spraying shell, the problem that the laser emitter is exposed outside is solved, the concealment of the laser emitter is achieved, and the laser emitter is convenient to use. The attractiveness and the ornamental value are increased, and the attractiveness and the practicability are combined; meanwhile, safe use of the laser transmitter is guaranteed, and man-made damage is reduced; the holographic laser device is attractive in appearance, has ornamental value, has more science and technology feeling for the performance holographic laser, can present varied images, generates a shocking visual effect, and integrally integrates practicability and decorative attractiveness into a whole.

The present disclosure provides a laser lighting system. The laser lighting system includes a microcontroller, a motor, a fluorescent color wheel, and a detection circuit. The motor drives the fluorescent color wheel to rotate. The detection circuit detects a detection signal from the fluorescent color wheel. When a synchronization signal changes, the microcontroller compares the synchronization signal and the detection signal, and controls a current output signal for driving the motor, thereby reducing a phase change of the detection signal and the synchronization signal until a phase difference between the detection signal and the synchronization signal is maintained at a constant value.

An image projection apparatus includes: a plurality of light sources configured to respectively emit laser lights of colors different from each other; at least one display element configured to modulate each of the laser lights emitted from the plurality of light sources, on the basis of a video signal; an illumination optical system configured to guide the laser lights emitted from the plurality of light sources, to the display element; and a projection lens configured to project the laser lights modulated by the display element. The illumination optical system separately includes: an optical element of a first system configured to uniformize an intensity distribution of one of the laser lights and guide resultant laser light to the display element; and an optical element of a second system configured to uniformize an intensity distribution of another of the laser lights and guide resultant laser light to the display element.

The invention relates to the technical field of underwater optical imaging, in particular to a fiber integrated modulation underwater long-distance optical detection system, a laser illumination optical module is used for emitting two beams of light with an included angle to an underwater target water body area, the two beams of light form spatial variation interference fringes in the target water body area, and light and shade alternate illumination light is generated; the Sabortus imaging optical module is used for shooting a target water body area under the illumination light according to Sabortus imaging conditions to obtain an underwater space image; and the circuit control core group is used for controlling the laser illumination optical module to emit two beams of light and collecting underwater space images from the Sabortus imaging optical module. According to the invention, a fiber integrated modulation fiber interferometer structure is introduced as a light source output regulation and control module, so that an emergent beam forms an angle to realize space interference, the regulation and control performance of a light source part of a traditional Saborne imaging laser radar is effectively improved, the size and weight are effectively reduced, and the Saborne imaging laser radar has the advantages and characteristics of low cost and stability.