401 results about "Light laser" patented technology

A head mounted display system with at least one retinal display unit having a curved reflector positioned in front of one eye or both eyes of a wearer. The unit includes a first set of three modulated visible-light lasers co-aligned and adapted to provide a laser beam with selectable color and a first scanner unit providing both horizontal and vertical scanning of the laser beam across a portion of the curved reflector in directions so as to produce a reflection of the color laser beam through the pupil of the eye onto a portion of the retina large enough to encompass the fovea. The unit also includes a second set three modulated visible-light lasers plus an infrared laser, all lasers being co-aligned and adapted to provide a color and infrared peripheral view laser beam, and a second scanner unit providing both horizontal and vertical scanning of the visible light and infrared laser beams across a portion of the curved reflector in directions so as to produce a reflection of the scanned color and infrared laser beams through the pupil of the eye onto a portion of retina corresponding to a field of view of at least 30 degrees×30 degrees.

An optical sensor and method for use with a visible-light laser excitation beam and a Raman spectroscopy detector, for detecting the presence chemical groups in an analyte applied to the sensor are disclosed. The sensor includes a substrate, a plasmon resonance mirror formed on a sensor surface of the substrate, a plasmon resonance particle layer disposed over the mirror, and an optically transparent dielectric layer about 2-40 nm thick separating the mirror and particle layer. The particle layer is composed of a periodic array of plasmon resonance particles having (i) a coating effective to binding analyte molecules, (ii) substantially uniform particle sizes and shapes in a selected size range between 50-200 nm (ii) a regular periodic particle-to-particle spacing less than the wavelength of the laser excitation beam. The device is capable of detecting analyte with an amplification factor of up to 1012-1014, allowing detection of single analyte molecules.

A head worn display system with at least one retinal display unit having a curved reflector positioned in front of one eye or both eyes of a wearer. The unit includes a first set of three modulated visible-light lasers co-aligned and adapted to provide a foveal laser beam with selectable color and a first scanner unit providing both horizontal and vertical scanning of the laser beam across a small portion of the curved reflector in directions so as to produce a reflection of the color laser beam through the pupil of the eye onto a portion of the retina large enough to encompass the fovea. The unit also includes a second set three modulated retinal visible-light lasers plus an infrared laser, all lasers being co-aligned and adapted to provide a color and infrared peripheral view laser beam, and a second scanner unit providing both horizontal and vertical scanning of the visible light and infrared laser beams across a portion of the curved reflector in directions so as to produce a reflection of the scanned color and infrared laser beams through the pupil of the eye onto a portion of retina corresponding to a field of view of at least 30 degrees×30 degrees.

The invention provides a welding line vision tracking system and method based on laser structural light. The welding line vision tracking system and method based on laser structural light comprises avision tracking module, a robot module, a welding gun module and a communication module; the vision tracking module comprises a CCD camera, a structural light laser device, an image collecting card and a controller for processing laser welding line images; the CCD camera and the structural light laser device in the vision tracking module are mounted on the robot module through a three-dimensionalmotion measuring system, the controller transmits data to the robot module and the welding gun module through the communication module, a coordinate identifying device is arranged in the robot moduleand is used for being determined as reference identifying points, and according to the method used by the system, a series of images are treated, and use of the welding gun is controlled. The weldingrobot can achieve real-time automatic deviation correcting in the welding process, welding line quality is improved, the application range of the welding robot is expanded, due to application of the welding line vision sensing tracking technology, quality and precision of the welding part can be improved, the product production period can be shortened, and production efficiency of products can beimproved.

The invention provides a welding seam visual tracking system based on laser structured light. The system comprises a visual tracking module, a robot module, a welding gun module and a communication module, wherein the visual tracking module comprises a CCD camera, a structured light laser device, an image acquisition card and a controller for processing the laser weld image; the CCD camera and thestructured light laser device in the visual tracking module are installed on the robot module through a three-dimensional motion measuring system, the controller is used for performing data transmitting to the robot module and the welding gun module through the communication module; and a coordinate identification device is arranged in the robot module and used for determining the identificationpoint serving as a reference, the method used by the system controls the use of a welding gun through a series of image processing. According to the system and the method, automatic correct deviationof the welding robot in real time in the welding process can be realized, the quality of the welding seam is improved, the application range of the welding robot is expanded, the application of the welding seam visual sensing tracking technology can improve the quality and precision of a welding part, the production cycle of products is shortened, and the production efficiency of the product is improved.

The invention discloses a high-sensitivity all-optical cesium atom magnetometer and belongs to an atom magnetometer. The magnetometer is provided with a magnetic shielding tube, a Cs atom gas chamber is placed in the magnetic shielding tube, a three-axis Helmholtz coil is placed around the Cs atom air chamber, and a pump light opening, a detection light opening and am emergent light opening are respectively formed in the magnetic shielding tube. The Cs atom gas chamber is cuboid, four surfaces, used for passing through deflection light to form reflection, excepting incident light and emergent light local parts of the detection light, the Cs atom air chamber are plated with polarization-maintaining films, and the other two surfaces used for passing through pump light are not plated with films. The detection light emitted by a detection light laser enters the Cs atom gas chamber through a polarizing film and a small aperture diaphragm and is emergent after reflected on all the surfaces of the gas chamber repeatedly, the polarization plane of the emergent light rotates by a one-degree angle, one drip of Cs, 100Torr of He gas and 20Torr of N2 gas are put into the Cs atom gas chamber, and the Cs atom gas chamber works at normal temperature. The high-sensitivity all-optical cesium atom magnetometer has the advantages of being simple in structure and still capable of keeping high sensitivity without being heated.

The invention relates to a high-speed WFOV (wide field of view) CARS (coherent anti-stokes raman scattering) microscope system and a high-speed WFOV CARS microscope method. In the invention, pumping laser and Stokes light laser which are totally coincident in the aspects of space and time are subjected to weak convergence, so that a sample generates a CARS signal; and the CARS signal enters a CCD(Charge Coupled Device) camera through an optical filter and a cylindrical lens so as to obtain a clear CARS image. The invention utilizes the CARS signal to image and relates to an imaging technology based on the vibration characteristic of energy level inside molecules. The high-speed WFOV CARS microscope system and the high-speed WFOV CARS microscope method can be used for detecting chemical compositions of the sample and can be used for carrying out imaging on a single cell, even a single organelle. The requirements of most of biological experiments are totally met. The technical problemsof low imaging speed, series photic damage to living biological tissues and the like of the existing CARS microtechnique are solved. Compared with the common fluorescence microscopy, the high-speed WFOV CARS microscope system and the high-speed WFOV CARS microscope method have the advantages that an external fluorescent probe does not need to be used, and influence on the molecular structure of the sample cannot be caused.

The invention relates to a method and device for detecting a defect of the surface of a steel rail based on data processing. The device comprises four sensors, a sensor bracket (5), a base (6), a railtransport roller (7), the steel rail (8), an encoder bracket (9) and an encoder (10); the four sensors are respectively arranged on four inner corners of the sensor bracket, the Z axes of all the sensors form a 45 degree included angle with the horizontal direction and are intersected at one point; the rail transport roller is fixed on the base and is used for supporting and transporting the steel rail. The method adopts the triangulation distance measurement principle of a linear laser, four line structured light laser sensors are used for collecting steel rail cross section profile data, and the steel rail profile data collected by all the sensors are subjected to coordinate conversion: rotation, translation, graphics splicing, and obtaining of the data splicing calibration value of allthe sensors. The method and devic can significantly improve the production efficiency, reduce the manual participation degree, and reduce the detection leakage rate and the misjudgment rate.

The invention discloses a full optical fiber communication system of a QKD system. The full optical fiber communication system comprises a sending end and a receiving end, the sending end comprises a sending end FPGA, a quantum light laser (1), a synchronization light and classic signal multiplexing laser (2), a sending end operation system, a sending end quantum signal modulating system and a sending end DWDM, and the receiving end comprises a receiving end FPGA, an SPD, a synchronization light detector, a receiving end quantum signal demodulating system, a receiving end DWDM and a receiving end operation system. The invention further discloses a full optical fiber communication method of the QKD system. By means of the full optical fiber communication system and method, the time division multiplex mode is adopted for sending three signals in one optical fiber, reticle connection is eliminated, key negotiation signals and synchronous data are sent through synchronization light laser synchronization time division multiplexing, dependences of QKD on classic Ethernet communication are eliminated, and the safety of the QKD system is greatly improved.

The invention discloses a deep space optical communication tracking and aiming system and a deep space optical communication tracking and aiming method. The system is provided with an internal inertia reference light source and two array cameras. The internal inertia reference light source has the wavelength different from that of external target beacon light. The inertia reference light source inside the system is imaged by a small array camera through a color separation film; a rapid tilting mirror is subjected to closed-loop control according to position deviation of image points, so that an optical axis of an optical path of the system is stable; the external target beacon light is imaged by a big array camera; and a tracking center of the small array camera is regulated according to the position deviation of the image points so as to fulfill the aim of stably and accurately tracking. The invention can greatly reduce the requirement on the power of a target terminal beacon light laser in the deep space optical communication, and provides feasibility guarantee implementation of the system.

The invention discloses an all-weather speed-measuring sky screen target which is characterized in that horizontal straight line structured light lasers are arranged at both sides of a detection target body of a box type sky screen target of the traditional lens group; and a generated fan-shaped shiny surface and a sky screen generated by the lens group are on a same plane. In the invention, the horizontal straight line structured light lasers as auxiliary light sources are fixedly arranged on the detection target body so as to be used as a light source; the light screen position of the sky screen target is also indicated; the reflected light of a reflecting film body on lasers is enabled to enter a detection lens by utilizing the reflecting film body positioned right above the detection target body of the sky screen target; light flux generated when a pill passes through the light screen of the sky screen target and a light screen of the lasers is sent to a calculagraph or a data acquisition device through photoelectric conversion and signal processing; and corresponding circuits are designed for different reflecting film bodies. The invention realizes the all-weather testing without being influenced by the change of sky brightness, day and night alternation and the transformation of sunny and rainy weathers, has the advantages of simple cloth target, higher position fault tolerance and low manufacturing cost and realizes the all-weather testing of pill speed.

The control device is applied to laser modulator installed on light laser. The control device includes following parts: an output port for adjusted peak signal, and the outputted peak signal is coupled to laser modulator after driven and modulated by the modulator; a output port of a DC bias voltage, and the outputted DC bias voltage is coupled to laser modulator; an input port for PD electrical signal output from the laser modulator; a control module in use for controlling operations of drive of modulator and the DC bias voltage, and making consistent between function curves of photovoltaic conversion in laser modulator. Comparing with prior art, the invention solves issues of large influence on filter caused by discretion of parts, large variety of phase delay when temperature changes, unable to lock peak point of PD electrical signal, and not good controllable adjustability caused by not controllable jumping position of bias control voltage, and no control communication port.

The invention relates to a full-solid-state single longitudinal mode yellow light laser which is characterized in that pump light emitted from a pump source is collimated and focused through an optical coupling system and is emitted to a self-Raman crystal through an input mirror, and the self-Raman crystal absorbs base frequency light generated by pump light energy in a self-Raman resonant cavity; the base frequency light is spread in the self-Raman resonant cavity in a reciprocating mode, is polarized through a Brewster window to form linear polarized light, lambda / 4 wave plate combination is used for enabling light spread in the self-Raman crystal on the inner side of the lambda / 4 wave plate combination to be circular polarized light and light spread in the self-Raman crystal on the outer side of the lambda / 4 wave plate combination to be linear polarized light, and therefore multimode oscillation caused by space burning holes can be effectively eliminated, and single longitudinal mode base frequency light is output; when the light field strength of the base frequency light gradually increases to reach a Raman threshold, the single longitudinal mode base frequency light is subjected to stimulated Raman scattering of the self-Raman crystal and is converted to single longitudinal mode Stokes light, and the Stokes light passes through a frequency doubling crystal to generate single longitudinal mode yellow light which is output to the outside of the cavity through an output mirror or a beam splitter. The full-solid-state single longitudinal mode yellow light laser can be widely applied to the manufacturing process of full-solid-state single longitudinal mode yellow light lasers.

The invention provides a time delay compensation device and a time delay compensation method for the self-adaptive optical fiber length in a quantum key distribution system. The device comprises a sending terminal, a receiving terminal and a single optical fiber positioned between the sending terminal and the receiving terminal, wherein the sending terminal comprises a processor, a timer, a classic light laser, a synchronous light laser, a quantum light laser, an electrically-controlled attenuator, a wavelength division multiplexer and a classical light detector; the method comprises the steps of carrying out distance measurement on optical fiber channels, calculating time delay and compensating. According to the device and the method, in the quantum key distribution system, the relative time delay of synchronous light and quantum light is measured and calculated according to the different lengths of the optical fiber channels, and time delay compensation is then added into the sending terminal; the problem of time delay drift caused by the different transmission speeds of light sources with different wavelengths in the same optical fiber is solved by using an active compensation method, so that error codes are reduced, and the stability of system operation is even guaranteed.

The invention relates to a self-frequency-doubling all-solid-state yellow-light laser. The laser comprises an excitation source, a focusing system, a self-frequency-doubling crystal and a laser resonator, wherein the self-frequency-doubling crystal is a ytterbium-ions-doped rare-earth calcium oxoborate crystal and is cut along the maximum direction of the effective nonlinear coefficient of a non main plane of the crystal; the excitation source is a 900-980nm light source; and the laser resonator is composed of an input cavity mirror and an output cavity mirror, the input cavity mirror and the output cavity mirror are each provided with a medium membrane for inhibiting vibration of a 1020-1080nm wave band, excitation light is subjected to collimating focusing and is injected into the self-frequency-doubling crystal through the input cavity mirror, the self-frequency-doubling crystal absorbs energy of the excitation light to generate fundamental frequency light in the laser resonator, and the fundamental frequency light carries out selection wavelength frequency multiplication through the self-frequency-doubling crystal so that 570-590nm yellow-light laser is output. The laser provided by the invention has the advantages of high output power, simple and compact structure, low cost, high temperature adaptability and the like.

A LED light laser sighting device includes a body (16), a reflecting cavity (2) provided in both sides of said body (16), a rear cap (17), a LED light (4), a laser indicator (5) and a battery box (8) provided between said reflecting cavity (2) and said rear cap (17) for battery. A circuit board (11) is provided between said reflecting cavity (2) and said battery box (8). Said LED light (4) is provided in said reflecting cavity (2). Said laser indicator (5) is provided in said body (16). The central axis of said reflecting cavity (2) coincides with the central axis of said body (16). Said LED light (4), said laser indicator (5) are electrically connected to said circuit board (11). The sighting device has a laser indicator provided in the body of the LED illumination device, so as to integrate the function of illumination and sighting indication. The device has compact structure, small volume, low weight and is easily assembled, disassembled, carried and used.

The invention discloses a line laser sensor, which can measure three-dimensional coordinates of a profile of a welding line in real time. The line laser sensor is characterized in that the device includes three parts, i.e., a line laser generation module, an image acquisition module and an image processing and control module. The line laser generation module performs line laser marking on the profile of the welding line, and the image acquisition module collects and outputs a line laser marked image. The image processing and control module receives light laser marked image data, performs image processing of enhancing, filtering, binaryzation and feature extraction, extracts image feature data required by calculation, and calculates three-dimensional coordinate data of the profile of the welding line according to the feature data, thereby achieving the goal of performing three-dimensional measurement on the profile of the welding line. The line laser sensor provided by the invention has the advantage that three-dimensional measurement accuracy reaches + / - 0.1mm.

The present invention belongs to the field of wireless communication technology, and discloses an underwater lighting and communicating system based on a visible light laser source. The system of the present invention uses a laser source with a light emitting wavelength in the visible light range. The laser source is made of gallium-nitride-based or gallium-arsenide-based semiconductor materials. The laser source is driven by a DC driving power source and is subjected to heat radiating package. After the emitted laser is scattered by an optical element, the laser can be used for underwater lighting; through the adding of a communicative modulation signal to jointly drive the laser together with the DC power supply, the laser source possesses the dual role of underwater lighting and communicating; in order to achieve the communicating purpose, the receiving end utilizes the optical element as the receiving antenna; and a photo-detector is used to convert the received optical signal into an electrical signal and the received signal is processed. The system of the invention realizes the purpose of underwater lighting and communicating while the laser source is used, which can achieve the advantages of high energy utilization, fast communication speed, high confidentiality and short time delay.

An objective of the present invention is to allow projecting a visible light laser beam and a near-infrared laser beam on a body to be processed such as a wafer with an inexpensive device configuration with a high degree of controllability, and to allow laser processing the body to be processed with a high degree of productivity. A laser beam processing device comprises: a visible light laser light source (G1) which outputs a visible light laser beam; a visible light optical assembly (GS (an optical fiber (G2) and a collimator lens (G3)) which wave guides the visible light laser beam; a near-infrared laser light source (R1) which outputs a near-infrared laser beam; a near-infrared optical assembly (RS (an optical fiber (R2), a light collection lens (R3), an optical fiber (R4), and a collimator lens (R5)) which wave guides the near-infrared laser beam; and a multiplexing optical assembly (MS (a dichroic mirror (M1), a galvano mirror (M2), and an f theta lens (M3)), which multiplexes the visible light laser beam, which is wave guided by the visible light optical assembly (GS) and the near-infrared laser beam which is wave guided by the near-infrared optical assembly (RS), and wave guides same to the body to be processed (1).

A self-raman double frequency total solid yellow light laser, includes a laser diode LD pumping source, a resonant cavity consisting of a back cavity mirror and an output mirror, characterized in that, a self-raman crystal, a Q-adjusting device and a double frequency crystal are arranged in the resonant cavity, which are processed with the temperature control by a cooling device. The laser of the invention has smaller volume, higher output power and conversion efficiency than that in the background technology, which can be widely used in the laser medical treatment field with small volume, stable performance and low cost.

The invention relates to a co-aperture emission and correction telescope combining the Rayleigh beacon and the sodium beacon. The telescope is formed by a sodium yellow-light laser, a beacon upstream light beam real-time compensation system and an emission telescope. The sodium yellow-light laser gives out laser of 589 nm so as to form the sodium beacon in a sodium layer in high-altitude excitation atmosphere of about 90 km, and generate the Rayleigh beacon in low altitude lower than 25 km. A low-density deformable reflection mirror and an inclining reflection mirror in the real-time compensation system carry out pre-correction on beacon upstream light beams, thereby achieving optimization of sodium beacon light spot shapes excited in the high-altitude atmosphere. The real-time light beam compensation system is mainly formed by the deformable reflection mirror, the inclining reflection mirror, a light splitting mechanism, a Rayleigh beacon wavefront detector and a wavefront controller. In this way, problems of expansion of sodium beacon shapes and inaccuracy of wavefront detection caused by poor observation address conditions and quite low observation angles of a telescope are solved and the telescope is characterized by compact structure, wide application range and easy achievement.

A refractometer computer controls the rotation of a rotary plate upon which are mounted a prism optically coupled via an optical window to a spectroscopic cell holding a resin exhibiting a dynamic refractive index during photocuring. The computer system positions the prism and spectroscopic cell relative to a visible light laser which illuminates the prism-resin interface at selected incidence angles. A photodetector mounted on the plate generates a signal to the computer proportional to intensity of an internally reflected light beam. A curing light is selectively transmitted through the prism and into the photocurable resin. The refractometer determines the intensity of the internally reflected beam a selected incidence angles and determines the effective refractive index curve of the resin at an uncured state and, optionally, at a completely cured state. Next, an amount of uncured resin and selected optical components to be joined by the resin is placed in the spectroscopic cell and irradiated with the UV light. The refractometer is fixed at a selected incidence angle and measures the intensity of an internally reflected light beam of light throughout the cure cycle. The refractometer determines the resin's refractive index of the polymeric mixture by means of extrapolation of a horizontal shift in the effective refractive index curve of the resin from an uncured state to a selected point in the cure cycle.

A laser safety system providing a system for checking the presence, focus and integrity of a laser beam focusing lens is disclosed. The laser safety system checks the focusing lens properties by capturing an image of a target by viewing the target through the focusing lens from along the laser beam path. An initial, known good, image is compared to an image captured immediately before enablement of the laser beam source to determine if the focusing lens is present, focused and is not damaged. The system may also utilize a mask projected onto the target as well as a low-power visible light laser directed along the path of the processing laser to determine the focusing lens properties. The system can also provide target recognition.

The invention provides a yellow light laser using a cascading superlattice as frequency changer crystal. The laser comprises a pumping light source, a resonant cavity formed by front and back cavity mirrors, a temperature control furnace and a two-segment cascading optical superlattice, wherein the cascading optical superlattice is used as the non-linear frequency changer crystal; and the light emitted by the pumping light source enters the resonant cavity and then passes the cascading optical superlattice, and finally the yellow light, of which the wavelength is 590nm, is outputted from the back cavity mirror. The first-segment structure of the cascading superlattice is used for realizing an oscillatory process of light parameters, and the second-segment structure of the cascading superlattice is used for generating the double frequency yellow light. The yellow light laser has the advantages that: the design is flexible; both the cascading periodic structure and the pseudo periodic, aperiodic or double periodic structure can be used to simultaneously realize the phase matching of two non-linear processes; a plurality of structures can be integrated on one chip, the structure is compact; the integrated property of the system is improved; the broad tuning yellow light output is realized; and the laser output is stably achieved, and the highly efficient and stable full solid-state yellow light laser is realized.

The invention belongs to the technical field of laser, and discloses a laser frequency stabilization system for a nuclear magnetic resonance gyroscope. The laser frequency stabilization system mainlycomprises a balance detector, a photoelectric detector, a laser frequency stabilization signal processing system and a nuclear magnetic resonance gyroscope basic system. A high-frequency small-amplitude modulation signal outputted by the laser frequency stabilization signal processing system is inputted into the injection current modulation port of the detection light laser; the a + port of the balance detector outputs a modulated optical detection signal and then feeds back and inputs the modulated optical detection signal to the laser frequency stabilization signal processing system, a PID feedback control signal is generated after the modulated optical detection signal is processed by the laser frequency stabilization signal processing system, and finally, the frequency of the detectionlight is locked at the extreme point of the spectral signal; the frequency stabilization method of the pump light is the same as the frequency stabilization method of the probe light, and the frequency of the pump light is locked at the extreme point of the spectral signal. The system is simple in design structure and easy to apply to the nuclear magnetic resonance gyroscope, and frequency stabilization of the pump light and the detection light can be realized only by utilizing the device conditions of the gyroscope system without externally building a frequency stabilization optical system.

The invention relates to a solid laser with adjustable pulse width from a hundred picoseconds to a nanosecond and solves problems of complicated structure and high cost of a narrow-pulse-width large-energy laser structure obtained by means of a mode-locking technique in combination with amplification technology. Linear polarized light generated by a seed light laser successively passes an isolator, a shaper 1, a polarization device 1, an amplifier 1, and a polarization device 2 and then enters a SBS pulse compressor. Light returned from the SBS pulse compressor successively passes the polarization device 2, the amplifier 1, the polarization device 1, the shaper 2 and the amplifier 2 and then exits from amplifier 2. The solid laser is simple in structure, lower in cost compared with a product in the prior art, large in output energy, good in the quality of output light beams, and suitable for the fields of laser medicine, nonlinear optics, precision machining and laser communication.