400 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 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 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 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 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 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 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).

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 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.