546 results about "Green laser" patented technology

A laser dazzler device and method. More specifically, embodiments of the present invention provide laser dazzling devices power by one or more green laser diodes characterized by a wavelength of about 500 nm to 540 nm. In various embodiments, laser dazzling devices according to the present invention include non-polar and / or semi-polar green laser diodes. In a specific embodiment, a single laser dazzling device includes a plurality of green laser diodes. There are other embodiments as well.

The invention relates to an underwater target tracking and positioning method, which comprises the following steps that: a central processing unit transmits a starting instruction and required positioning data rate information to a blue and green laser transmitting and receiving integral rotatable device, scans an underwater responder, and transmits a laser signal containing the data rate information to the underwater responder; the underwater responder reflects the laser signal according to the prior path, and a transducer is opened; after the reflected laser signal is received, the transducer transmits a synchronous timing signal to the central processing unit, and the central processing unit begins timing; the underwater responder transmits a periodical frequency hopping pulse signal of corresponding data rate to a hydrophorce according to the data rate information; the hydrophorce transmits a direct signal to the central processing unit; and the central processing unit calculates distance information, corrects the coordinate and calculates the coordinate of the underwater responder. The invention also relates to an underwater target tracking and positioning system. The invention adopts a blue and green laser synchronous time synchronization mechanism and a hydroacoustic frequency hopping mechanism to solve the problems of synchronous error and multi-path interference in the prior short-baseline hydroacoustic positioning system respectively.

A semiconductor is cut by directing a green laser beam of high power, and subsequently directing a UV beam along the cut line. The first beam performs cutting with relatively rough edges and a high material removal rate, and the second beam completes the cut at the edges for the required finish, with a lower material quantity removal.

The invention discloses an underwater wireless acousto-optic communication device and method. The underwater wireless acousto-optic communication device comprises a water depth and posture measurement module, an acoustic communication module, a main control panel, a theodolite, a pulse blue-green laser, a laser emission telescope, a receiving telescope, a photoelectric detection and signal conditioning module and a high-speed data acquisition module. The underwater wireless acousto-optic communication device comprehensively utilizes the characteristics of an acoustic signal which is low in rate, but large in sidelobe and long in transmission distance and the characteristics of an optic signal which is high in communication rate, good in directivity and longer in transmission distance, realizes underwater high-speed information transmission in a longer distance, and has the characteristics of small size, light weight, high integration level, good reliability and high performance-cost ratio.

Using laser line in high brightness emitted from linear light source of green laser in great power irradiates surface of hot rolling strip steel. Linear array CCD camera collects laser light reflected from surface of strip steel online so as to obtain image on surface of strip steel. Based on different properties of light reflectivity between defect area and no defect area on surface of strip steel, the invention carries out process and analysis for image on surface of strip steel collected by camera, so as to determine whether there are defects on surface of strip steel and sort the defects. The invention does not need of unpacking roller, installing baffle, uses fewer light sources so as to lower cost of hardware, and maintenance cost. Since laser light possesses good condensation performance and monochromaticity, images on surface of strip steel collected by camera are in good quality. Thus, tiny defect can be detected.

A method and apparatus for despeckling that includes a green laser diode, a DPSS laser, and stimulated Raman scattering light formed in an optical fiber. The laser diode light and stimulated Raman scattering light are combined to form a projected digital image. The output of the optical fiber may be split into two spectrums. The projected digital image may be stereoscopic with one image formed from the laser diode light and one spectrum, and the other image formed from the other spectrum.

Light from discrete red, blue, and green lasers are combined into a single output using a planar lightwave circuit (PLC). In some embodiments some light from an output of the PLC is reflected back to the lasers, and in some embodiments the reflected light is primarily of one of the red, green, or blue wavelengths. In some embodiments multiple lasers of slightly differing wavelengths are provided as light sources for some or all of the red, blue, and green light.

The present invention provides a hologram recording medium wherein, in holographic memory recording using a blue laser as well as a green laser, a fall in light transmittance is very small even after recording. A hologram recording medium comprising at least a hologram recording material layer, wherein the hologram recording material layer (21) comprises at least fine particles of a metal compound, and a photopolymerizable compound; and the recording sensitivity of said recording medium (11) to a laser light having a wavelength of 405±5 nm is 0.05 cm / mJ or more and 1.20 cm / mJ or less.

The present invention provides a hologram recording material which is suitable for volume hologram record and attains high refractive index change, flexibility, high sensitivity, low scattering, environment resistance, durability, low shrinkage and high multiplicity in holographic memory record using not only a green laser but also a blue laser; a process for producing the same; and a hologram recording medium having the hologram recording material. A hologram recording material comprising: a metal oxide comprising Si and at least one selected from the group consisting of Ta and Zr, as metals, wherein a complexing ligand is coordinated to Ta and / or Zr; and a photopolymerizable compound. The complexing ligand is preferably selected from the group consisting of β-dicarbonyl compounds, polyhydroxylated ligands, and α- or β-hydroxy acids. A hologram recording medium (11) comprising the hologram recording material layer (21).

The present invention provides a hologram recording material which is suitable for volume hologram record and can attain high refractive index change, flexibility, high sensitivity, low scattering, environment resistance, durability, low dimensional change (low shrinkage) and high multiplicity in holographic memory record using not only a green laser but also a blue laser; and provides a hologram recording medium having a hologram recording layer comprising the hologram recording material. A hologram recording material comprising a metal oxide matrix and a photopolymerizable compound, wherein the metal oxide matrix comprises at least Si and Ti as metallic elements, and Ti originates from titanium-containing oxide fine particles. A hologram recording medium (11) having the hologram recording layer (21) comprising the hologram recording material.

The present invention provides a hologram recording medium which is suitable for volume hologram record and can attain high refractive index change, flexibility, high sensitivity, low scattering, environment resistance, durability, low dimensional change (low shrinkage) and high multiplicity in holographic memory record using not only a green laser but also a blue laser. A hologram recording medium (11) comprising at least a hologram recording layer (21), wherein the hologram recording layer contains a metal oxide matrix comprising metal oxide fine particles, and a photopolymerizable compound; the metal oxide fine particles comprise metal oxide fine particles containing Ti as a metallic element; and at the time of subjecting the hologram recording layer before exposure to light to an extraction operation in n-butyl alcohol having a mass 100 times the mass (W) of said recording layer, thereby yielding a sol solution; filtrating the sol solution to obtain a filtrated sol solution; and measuring particle diameter distribution of sol particles in the filtrated sol solution by a dynamic light scattering method; and obtaining an average particle diameter thereof, the average particle diameter of the sol particles is in the range of 5 nm or more and 50 nm or less.

The present invention provides a hologram recording material which is suitable for volume hologram record and attains high refractive index change, flexibility, high sensitivity, low scattering, environment resistance, durability, low shrinkage and high multiplicity in holographic memory record using not only a green laser but also a blue laser; a process for producing the same; and a hologram recording medium having the hologram recording material. A hologram recording material comprising: a metal oxide containing at least Si and Zr as metals, wherein an aromatic carboxylic acid compound is coordinated to Zr; and a photopolymerizable compound. The aromatic carboxylic acid compound is, for example, toluic acid. A hologram recording medium (11) comprising the hologram recording material layer (21).

An invasive laser acupuncture includes a first semiconductor laser connected to a first optical fiber acupuncture and providing red-based laser beam with the first optical fiber acupuncture; a second semiconductor laser connected to a second optical fiber acupuncture and providing a green-based laser beam with the second optical fiber acupuncture; and a driving circuit independently driving the first semiconductor laser and the second semiconductor laser in a continuous mode or a pulse mode by a switching operation. Since red and green lasers can independently be driven in the continuous mode and the pulse mode, the red and green laser can easily be adopted in a reinforcing and reducing treatment method in traditional oriental medicine. In addition, by using a metal-coated optical fiber acupuncture, the optical fiber acupuncture is injected directly into meridian pathways provided under an epidermal layer, such that it is possible to efficiently transmit a laser beam without loss.

The present invention provides a hologram recording medium wherein high refractive index change, flexibility, low scattering, environment resistance, durability, low dimensional change (low shrinkage), and high multiplicity are attained in holographic memory recording using a blue laser as well as a green laser. A hologram recording medium comprising at least a hologram recording layer, wherein the hologram recording layer (21) contains at least an organometallic compound which contains a metal atom, an organic group, and an oxygen atom, and has a direct bond between the metal atom and a carbon atom in the organic group (a metal-carbon bond), and a bond between the metal atoms through the oxygen atom (a metal-oxygen-metal bond) and a photopolymerizable compound; and the hologram recording layer (21) contains the metal atoms in an amount of 3.0% by mass or more and 20% by mass or less with respect to the hologram recording layer.

A lightweight, compact image projection module, especially for mounting in a housing having a light-transmissive window, is operative for causing selected pixels in a raster pattern to be illuminated to produce an image of high resolution of VGA quality in color. A compact acousto-optical modulator is used to modulate a green laser beam used to produce the image.

The invention provides a color computational holography aberration compensation system and method based on a varifocus lens. The system comprises a red laser device, a green laser device, a blue laser device, a shutter I, a shutter II, a shutter III, a filter I, a filter II, a filter III, a collimating lens I, a collimating lens II, a collimating lens III, a reflecting lens, a semi-transmission semi-reflecting lens I, a semi-transmission semi-reflecting lens II, a space light modulator, a computer, a driving panel, the varifocus lens, a receiving panel and a synchronous control circuit. The varifocus lens is used for replacing a solid lens commonly used in a color computational holography optics reappearing process, the varifocus performance of the varifocus lens is used, the focal lengths of the varifocus lens during reappearing of light with different colors are changed, so that R, G and B three-color reappearing image axial coinciding is achieved, accordingly, aberration compensation is achieved, the system can be effectively simplified, cost is lowered, and reappearing image quality is improved.

A laser beam in the ultraviolet region is generated at high power for along period. A green laser beam generated by a laser oscillator comes incident into a resonator from behind a first curved mirror, and circulates there, reflected by each mirror. By passing a barium borate crystal, it causes a secondary harmonic (a laser beam in the ultraviolet region) to be generated, which is taken out of the resonator via a second curved mirror. The beam waist of the laser beam passing the barium borate crystal is set to 46 mum, about double the conventional thickness, by adjusting the distance between the first curved mirror and a second flat mirror. As a result, the power density of the laser beam in the barium borate crystal is reduced to ¼ of the value according to the related art, and it is made possible to avoid rapid degradation of the barium borate crystal by excessive squeezing of the laser beam.

The invention discloses a colon cancer protein mark parallel test liquid phase chip, which is mainly formed by: micro ball, capture antibody, test antibody and streptomycin-phycoerythrin, wherein the capture antibody with the corresponding micro balls form coupling conjugated, which uses red laser to active the red categorizing fluorescence of the sphere base material and ascertains the type by the different color of the sphere base material; the test antibody is a skin factor mark antibody; the capture antibody and the test antibody can combine with the colon cancer protein mark; the test antibody combines with the streptomycin-phycoerythrin and uses green laser to active the phycoerythrin to measure the report fluorescence molecular number of the sphere base material, which can indirect ascertain the colon cancer protein mark content combines with the sphere base material. The invention also discloses the colon cancer protein mark parallel test liquid phase chip applied in preparing the test agent.

Red, blue and green lasers respectively emit a plurality of red, blue and green laser beams having respective output powers. The beams are optically focused and collinearly arranged to form a composite beam which is swept by a pair of scan mirrors in a pattern of scan lines on a projection surface, each scan line having a number of pixels. A controller causes selected pixels to be illuminated, and rendered visible, by the composite beam to produce an image. A safety circuit detects a malfunction of at least one of the lasers and the scan mirrors, and deenergizes the at least one of the lasers and the scan mirrors upon detection of the malfunction.

The invention relates to a data transmission system for an underwater acoustic network, which comprises a plurality of independent underwater nodes, wherein each underwater node is equivalently connected with at least the other underwater node. The data transmission system also comprises a transmitting optical antenna, a receiving optical antenna, a light source, an optical modulator, an optical receiver, an underwater acoustic transducer / receiving transducer, a digital signal processor and a positioning module, wherein the positioning module is provided with a rotating device and used for completing the alignment between the light source and the optical receiver; the transmitting optical antenna, the light source, the optical modulator and the digital signal processor are in signal connection with each other in turn; the receiving optical antenna, the optical receiver and the digital signal processor are in signal connection with each other in turn; the digital signal processor is also in signal connection with the positioning module and the underwater acoustic transducer / receiving transducer respectively; and the light source is a blue-green laser source. The invention also relates to a data transmission method for the underwater acoustic network. The invention reduces the collision probability of data in the transmission process, improves the success rate of the construction of a communication link, saves the network bandwidth, and improves the network throughout.

The invention relates to an optical engine for laser projection display of a three-piece liquid crystal on silicon (LCOS). The optical engine comprises a red laser, a green laser, a blue laser, three dodging and reshaping systems, an optical core, a three-piece LCOS, a reflecting mirror and a projection objective, wherein the luminescence centers of the three lasers are positioned on the main optical axes of corresponding dodging and reshaping systems; the three optical axes of corresponding dodging and reshaping systems are parallel with one another; three light beams emitted by the three lasers are adjusted into uniform rectangular parallel light beams by the dodging and reshaping systems respectively; two beams of light directly enter corresponding polarization beam splitters, and the other beam of light is reflected by the reflecting mirror and enters a corresponding polarization beam splitter; and polarized light in three colors is finally combined into white light and enters the projection objective by the optical core. The lasers are taken as light sources, generated laser light is small-bandwidth linear polarized light, and a color filter is not used, so that a large number of polaroids are eliminated, cost is lowered, and the utilization ratio of optical energy is increased simultaneously; and the color gamut range, color brightness degree and color fidelity degree of the optical engine are better than those of the optical engine of the conventional optical system.

The present invention is directed to display technologies. More specifically, various embodiments of the present invention provide projection display systems where one or more laser diodes are used as light source for illustrating images. In one set of embodiments, the present invention provides projector systems that utilize blue and / or green laser fabricated using gallium nitride containing material. In another set of embodiments, the present invention provides projection systems having digital lighting processing engines illuminated by blue and / or green laser devices. In one embodiment, the present invention provides a 3D display system. There are other embodiments as well.

The invention relates to a double-laser beam compound welding device and a use method. The device comprises a YAG (Yttrium Aluminum Garnet) laser emitter, a green laser emitter and an achromatism welding joint, wherein the achromatism welding joint is capable of inputting double-flexible optical fiber and coaxially outputting double-light beam; a welding joint light path comprises a YAG laser anti-reflection collimating lens, a green laser anti-reflection collimating lens, a YAG laser total-reflection lens, a green laser total-reflection and YAG laser anti-reflection lens and a green laser and YAG laser anti-reflection focus lens; and a divergence angle of a YAG laser beam between the YAG laser anti-reflection collimating lens and the green laser and YAG laser anti-reflection focus lens is changed by changing a distance between an optical fiber head of a YAG laser transmission optical fiber and a front focus of the YAG laser anti-reflection collimating lens, so as to change the focusing faculae position of the YAG laser and realize the superposition of the focusing faculae of the YAG laser beam and the green laser beam at the welding joint of a to-be-welded workpiece. According to the double-laser beam compound welding device, the green laser beam is adopted for preheating the to-be-welded workpiece, and then the YAG laser beam is adopted for welding, so that the welding problem caused by the high reflection coefficient of the surface of copper is effectively solved.

The present invention discloses a laser equalization coupling device for laser display, and includes a trichromatic laser source and a focusing device. The trichromatic laser source comprises at least one red laser device, at least one green laser device, and at least one blue laser device. The focusing device includes a plurality of coupling optical fibers and a bushing. All coupling optical fibers correspond to the laser devices one-to-one. The laser emitted by the laser device couples and enters into the corresponding coupling optical fiber, and all output ends of the coupling optical fibers are packed in the bushing to form a combined beam of output laser. The present invention can meet the brightness requirement of the big-screen laser display, can reduce the volume of the whole coupling device, and can eliminate the beam speckle.

The invention relates to an HUD luminance improving device, namely, a high-luminance HUD optical system based on laser micro projection. The HUD luminance improving device comprises an image analysis system, an image receiving system and an eyepiece system. The HUD luminance improving device is characterized in that a red laser device, a green laser device and a blue laser device are used as signal light sources; an optical thin film is introduced into the eyepiece system, so that corresponding red light, corresponding green light and corresponding blue light are reflected, and light with other wave lengths directly penetrates through the optical thin film or part of the light penetrates through the optical thin film, wherein the corresponding red light, the corresponding green light and the corresponding blue light are emitted by the laser devices. The HUD luminance improving device has the high-luminance information display effect and enables a high-definition external environment display view to be obtained.

The invention discloses a speckle-free three primary color laser light source. The light source includes an infrared laser module, a green laser module, a blue laser module, a power transmitting fiber; a collimating lens, one diffuser which is spun by a motor; one converging lens which is intended for converging multiple beams of laser rays; and one rectangular optical integrator which is intended for outputting even rectangular speckles. The invention also discloses a laser projection system. According to the invention, the method for eliminating laser speckles emphasizes on conducting speckle elimination on green laser that is sensitive to human eyes, and has visible effects. The speckle-free laser light source, by adopting three primary colors special optical fiber coupling and clustering power synthesis technology, realizes high-brightness small optical expansion and even laser output. The laser projection system adopts the speckle-free laser light source of the invention, can effectively reduce the laser speckle contrast ratio of a projection picture, and increases the quality of the projected display image.

The invention discloses a laser projection display system based on a full-semiconductor laser. The laser projection display system comprises a laser light source module, a light path module, a circuit module and an optical sensor module, wherein the laser light source module is used for providing three required lasers, namely red laser, blue laser and green laser, for the projection display system; the light path module is used for performing light unification and imaging processing on light provided by the laser light source module, making the light illuminated on chips, transmitting the light modulated by the chips to a projection lens, and forming an image for output; the circuit module is used for regulating the chips in the light path module according to external audio and video signals and regulating the power of the three lasers in the laser light source module according to a certain algorithm and a conditioning signal generated by an optical sensor; and the optical sensor module is used for detecting the brightness of an external environment and the brightness of an image output by the system, forming a conditioning signal according to a certain algorithm and transmitting the conditioning signal to the circuit module. By the laser projection display system, manual or automatic regulation of the color gamut and the brightness is realized.