63 results about "Blue laser light" patented technology

The invention provides europium-doped silicate green fluorescent powder as well as a preparation method and application thereof, and belongs to the technical field of luminescent materials. The green fluorescent powder can generate narrow-spectrum green light with the peak value located at 532 nm under excitation of 450 nm blue light, the full width at half maximum is 46 nm, a white light LED device prepared based on the fluorescent powder has a 110% NTSC color gamut, and it is indicated that the green fluorescent powder has excellent application value in backlight display. The saturation threshold value of the fluorescent powder reaches 21.6 W / mm < 2 > under the excitation of 450nm blue laser, and the lumen at the moment reaches 1157.9 lm. The green fluorescent powder disclosed by the invention has the advantages of high luminous efficiency, narrow full width at half maximum, high light saturation threshold under blue laser excitation, high lumen efficiency and the like, and has application feasibility in the aspect of laser display.

The invention relates to the technical field of hybrid bonding, in particular to a laser-assisted hybrid bonding interconnection method, which comprises the following steps of: S1, processing the surface of a wafer to enable the to-be-bonded surface of the wafer to be flat; s2, cleaning a to-be-bonded surface of the wafer, and removing organic pollutants and an oxide layer; s3, aligning and fitting the surfaces to be bonded of the two wafers; s4, enabling the to-be-bonded surfaces to comprise dielectric layers and metal interconnection points, irradiating the dielectric layers with infrared laser, and carrying out the interconnection of the dielectric layers of the two to-be-bonded surfaces; and S5, the metal interconnection points are heated by blue laser, and the metal interconnection points of the two surfaces to be bonded are interconnected. In the hybrid bonding stage, the infrared laser and the blue laser are used for bonding the dielectric layer and the metal interconnection point respectively, partitioned irradiation and differentiated heating of the metal interconnection point and the dielectric layer are achieved, the problems of interface warping, microcracks and other thermal damage are effectively avoided, and the interconnection quality and the packaging reliability are improved.

The invention provides an illumination system and projection equipment. The lighting system comprises a light source module, a wavelength conversion device, a first light guide assembly, a second light guide assembly and a micro-lens array module. The light source module is used for providing a plurality of green and blue laser beams. The wavelength conversion device is used for generating fluorescent light beams. The first light guiding assembly and the second light guiding assembly are used for guiding a fluorescent light beam and a green laser light beam respectively. The fluorescent light beams form fluorescent light spots on the first area of the first side face of the micro-lens array module. The plurality of green laser beams form a plurality of green light spots on a second area of the first side surface of the micro-lens array module. The first region is adjacent to the second region. The illumination system and the projection equipment provided by the invention avoid energy loss and have good light uniformity.

An all-epitaxial, electrically injected surface-emitting green laser operates in a range of about 520-560 nanometers (nm). At 523 nm, for example, the device exhibits a threshold current density of approximately 0.4 kilo-amperes per square centimeter (kA / cm2), which is over one order of magnitude lower than that of previously reported blue laser diodes.

The invention discloses a laser light source-based baffle-free integrated automobile headlamp optical system, which comprises a low-beam laser light source, a high-beam laser light source, a low-beam focusing reflector, a high-beam reflection cup and a high-beam and low-beam light distribution lens, the high-beam and low-beam laser light source comprises a blue laser diode, a laser collimating lens, a laser focusing reflector and a curved reflector embedded with yellow fluorescent powder, and the low-beam focusing reflector and the high-beam reflection cup are used for reflecting light to the lower half portion and the upper half portion of the high-beam and low-beam light distribution lens respectively. The high-beam and low-beam light distribution lens is a double-free-form-surface lens of a segmented structure, the upper half portion of the lens is a two-section symmetrical fan-shaped lens and used for high-beam illumination, and the lower half portion of the lens is a four-section fan-shaped lens and used for low-beam illumination. According to the baffle-free dual-light integrated structural design, the weight of the headlamp can be effectively reduced, the size is reduced, and the system stability is improved.

The invention may be embodied in other forms than those specifically disclosed herein without departing from itMulti-kW-class blue (400-495 nm) fiber-delivered lasers and module configurations. In embodiments, the lasers propagate laser beams having beam parameter products of <5 mm*mrad, which are used in materials processing, welding and pumping a Raman laser. In an embodiment the laser system is an integration of fiber-coupled modules, which are in turn made up of submodules. An embodiment has sub-modules having a plurality of lensed blue semiconductor gain chips with low reflectivity front facets. These are locked in wavelength with a wavelength spread of <1 nm by using volume Bragg gratings in an external cavity configuration. An embodiment has modules having of a plurality of submodules, which are combined through wavelength multiplexing with a bandwidth of <10 nm, followed by polarization beam combining. The output of each module is fiber-coupled into a low NA fiber. In an embodiment a kW-level blue laser system is realized by fiber bundling and combining multiple modules into a single output fiber.

Provided is a bulging amount measurement device capable of measuring the bulging amount of a cast slab in a non-contact manner even in an environment in which a large amount of steam is generated at a high temperature.　The present invention pertains to a bulging amount measurement device for measuring the bulging amount of a cast slab cast by a continuous casting machine, the bulging amount measurement device comprising: a two-dimensional laser distance meter that is provided on both sides in a long side direction and / or a short side direction of a cast slab in which solidification has been completed, and measures the distance to the cast slab from a plurality of positions in the short side direction and / or the long side direction; and a calculation device that calculates the bulging amount on a short side and / or a long side of the cast slab by using the distance measured by the two-dimensional laser distance meter. The two-dimensional laser distance meter emits blue laser light having a wavelength of 360-480 nm onto the cast slab.

To provide a light source device that can be reduced in size, and a projection apparatus including the light source device.SOLUTION: A light source device 60 comprises: a blue laser diode 71 that emits blue wavelength band light; a red light emitting diode 81 that emits red wavelength band light; a light path switching device 142 that is disposed on a light path of the blue wavelength band light emitted from the blue laser diode 71 and switches the incident blue wavelength band light between a light path in a first direction D1 and a light path in a second direction D2; a fluorescence emitting device 100 that is disposed on the light path in the second direction D2 and has a fluorescence emitting region that emits fluorescence including green wavelength band light using the blue wavelength band light as excitation light; and a light source optical system 140 that guides the blue wavelength band light switched to the light path in the first direction D1 by the light path switching device 142, the red wavelength band light emitted from the red light emitting diode 81, and the fluorescence emitted from the fluorescence emitting region to a combined light path.SELECTED DRAWING: Figure 3

The application discloses a laser, a laser light source and a laser projection device, and belongs to the projection display field.The laser comprises a substrate and a plurality of laser units arranged in an array on the substrate.In the application, the laser comprises two rows of laser units, one row of red light laser units for emitting red laser, and the other row of green light laser units for emitting green laser and blue light laser units for emitting blue laser.Under the premise of ensuring the brightness of the laser beam emitted by the laser, the number of laser units in the laser is reduced.Thus, the overall volume of the laser can be effectively reduced, and the volume of the laser projection device integrated with the laser is small.

The objective of the present invention is to provide: a beam combiner in which the intensity of blue laser light after coupling is sufficiently strong and a temperature rise is suppressed; and a beam combiner system including the beam combiner. A beam combiner (1) according to the present invention comprises a substrate (2) and an optical multilayer film (4) formed directly on a substrate surface (Q), which is the surface of the substrate (2). The optical multilayer film (4) has alternating low refractive index layers and high refractive index layers, transmits first laser light (L1) in the blue region of p-polarized light, and reflects polarization-converted laser light (LZ) in the blue region of s-polarized light. Each high refractive index layer of the optical multilayer film 4 is an HfO2 layer made of HfO2 and contains a monoclinic crystal. The (-111) plane of the monoclinic crystal is oriented in the direction perpendicular to the substrate surface (Q).

The invention discloses a fluorescent glass ceramic membrane with high color temperature uniformity and a preparation method and application thereof, and belongs to the technical field of laser illumination and display. A preparation method of a fluorescent glass ceramic membrane with high color temperature uniformity comprises the following steps: S1, uniformly mixing lithium disilicate glass powder, garnet fluorescent powder and an organic solvent to obtain slurry, and coating a substrate with the slurry to obtain an intermediate material; and S2, carrying out two-step heat treatment on the intermediate material to obtain the fluorescent glass ceramic membrane with high color temperature uniformity. The lithium disilicate glass forms an interlocking microcrystalline network structure in the fluorescent glass ceramic through two-step heat treatment by utilizing a nucleation crystallization mechanism of the lithium disilicate glass. The lithium disilicate glass with the microcrystalline interlocking network structure not only can ensure the compactness of a fluorescent glass ceramic film, but also can provide a scattering medium for blue laser, so that the scattering effect of the blue laser in a fluorescent conversion layer is remarkably improved, and the color temperature uniformity of white laser is further improved.

After irradiation with the blue laser beam, intervals between the adjacent copper-based foils along the stacking direction in a neighborhood of a molten area generated in the stacked metal foils are smaller than the thickness of each of the copper-based foils.

The invention provides a light generating system (1000) comprising a first light generating device (1100), a second light generating device (1200), a luminescent material (200), one or more diffusers (710) and a control system (300); wherein the first light generating arrangement (1100) comprises a plurality of first light generating devices (110) configured to generate first device light (111); wherein the first light generating arrangement (1100) comprises a first laser set comprising the plurality of first light generating devices (110); wherein the first light generating device (110) comprises a first laser diode; and wherein the second light generating arrangement (1200) comprises a plurality of second light generating devices (120); wherein the plurality of second light generating devices (120) comprises (a) one or more primary second light generating devices (1210) configured to generate primary second device light (1211), and (b) one or more secondary second light generating devices (1220) configured to generate secondary second device light (1221); wherein the second light generating device (1200) comprises a second laser set comprising the plurality of second light generating devices (120); wherein the plurality of second light generating devices (120) comprises a primary second laser diode and a secondary second laser diode.

The invention discloses a low-threshold adjustable micro white light laser based on a perovskite micron sheet and a preparation method of the low-threshold adjustable micro white light laser in the field of semiconductor lasers. The low-threshold adjustable micro white light laser based on the perovskite micron sheet comprises a gain medium, the gain medium is an Erx: CsPbyClaBrbIc micron sheet, x + y = 1, a + b + c = 3, and x, y, a, b and cgt; 0; the Erx: CsPbyClaBrbIc micron sheet is of a Cl, Br and I halogen phase separation structure induced by Er < 3 + >, a stable three-phase pinning energy band is formed, and red laser, green laser and blue laser can be emitted at the same time. According to the low-threshold adjustable micro white light laser based on the perovskite micron sheet and the preparation method thereof, fine adjustment of chromaticity and color temperature can be achieved by adjusting halide composition, and the low-threshold adjustable micro white light laser has the advantages of being simple in preparation process, excellent in performance and high in stability.

A laser welding method for stacked metal foils comprising a plurality of stacked copper-based foils, comprising the steps of: vertically stacking the plurality of copper-based foils; arranging the stacked metal foils on a workpiece holder in a blue laser welding system; and irradiating the stacked metal foils with a blue laser beam directed in a prescribed direction. After irradiation with the blue laser beam, a lower end surface of a molten region generated in the stacked metal foils does not curve toward a center side of the molten region in a cross-section of the stacked metal foils along a stacking direction of the copper-based foils.

A method and device for emitting electromagnetic radiation at high power using nonpolar or semipolar gallium containing substrates such as GaN, AlN, InN, InGaN, AlGaN, and AlInGaN, is provided. In various embodiments, the laser device includes plural laser emitters emitting green or blue laser light, integrated a substrate.

This invention discloses a color enhancement method for a single phosphor wheel architecture, comprising a projector using a single phosphor wheel. This projector does not have a color wheel; yellow (Y), red (R), and green (G) are all generated from the phosphor wheel and produced by laser irradiation of phosphors. Blue (B) is generated from the optical path behind the phosphor wheel by creating a hole in the phosphor wheel. The laser irradiation occurs in the optical path system where a blue laser excites the phosphor. The red (R) phosphor produced after irradiation has a poor effect, with a color bias towards orange. Without changing the single phosphor wheel architecture, the color coordinates of red (R) are improved by adding a glass filter to the surface of the red (R) phosphor. To improve the color of a single phosphor wheel, this invention requires adding a filter to the area where color improvement is needed. However, the added filter's refractive index and thickness cause the original focal point to shift backward. This is compensated for by locally processing an aluminum sheet to correct the shift in focal point, allowing each color to achieve its optimal color coordinates and efficiency.

The present invention relates to the technical field of rare earth luminescent materials and provides a red nitride phosphor, and a preparation method therefor and a use thereof. The chemical composition of the red nitride phosphor of the present invention is Sr2[Mg1-xLixAl5-xSixN7]:yEu2+, wherein 0.001≤x≤0.50 and 0.0005≤y≤0.20. The phosphor is based on a nitride system, exhibits strong light absorption of blue light at 400-500 nm, has an excitation peak value of about 460 nm, can be effectively excited by blue laser light, can emit red fluorescence under blue light excitation, has an emission peak value adjustable in the range of 635 nm to 685 nm and a full width at half maximum adjustable in the range of 75 nm to 90 nm, and greatly contributes to high color gamut in display devices. The phosphor, when used in various laser display devices using blue light high-power lasers as excitation sources, has the advantages of strong luminous brightness, high luminous efficiency, and stable physical and chemical properties.

The invention provides a light generating system (1000) comprising (i) a plurality of light sources (110, 120,...), (ii) a first luminescent material (210) and (iii) a second luminescent material (220), wherein: (a) a first light source (110) is configured to generate first light source light (111) having one or more wavelengths in a blue wavelength range and having a first centroid wavelength (λC1), wherein the first light source (110) is a laser; (b) the first luminescent material (210) is configured to convert at least part of the first light source light (111) into first luminescent material light (211) having one or more wavelengths in a green and / or yellow wavelength range; (c) a second light source (120) is configured to generate second light source light (121) having one or more wavelengths in a yellow and / or orange wavelength range and having a second centroid wavelength (λC2), wherein λC2> λC1; wherein the second light source (120) is a superluminescent diode; (d) the second luminescent material (220) is configured to convert at least part of the second light source light (121) into second luminescent material light (221) having one or more wavelengths in an orange and / or red wavelength range; and (e) in an operational mode, the light generating system (1000) is configured to generate system light (1001) comprising the first luminescent material light (211) and the second luminescent material light (221).

A light source device (60) is provided with: a blue laser diode (71) provided so as to emit blue wavelength band light; a red light emitting diode (81) that emits red wavelength band light; an optical path switching device (142) that is provided on the optical path of the blue-wavelength-band light emitted from the blue laser diode (71) and that switches the incident blue-wavelength-band light to at least an optical path in a first direction (D1) and an optical path in a second direction (D2); a fluorescent light-emitting device (100) that is provided on the optical path in the second direction (D2) and has a fluorescent light-emitting region that emits fluorescent light including green wavelength band light using blue wavelength band light as excitation light; and a light source optical system (140) that guides, to a combined optical path, the blue-band light that has been switched to the optical path in the first direction (D1) by the optical path switching device (142), the red-band light that has been emitted from the red light-emitting diode (81), and the fluorescent light that has been emitted in the fluorescent light-emitting region.

A light source comprises a first blue light source, a second blue light source, a beam splitting module, and a phosphor. The first blue light source is configured to emit first blue laser light and the second blue light source is configured to emit second blue laser light. The beam splitting module splits the second blue laser light to obtain first sub-laser light and second sub-laser light. A wavelength and a polarization of the first sub-laser light are different from those of the first blue light source to suppress a speckle of blue laser light. The second sub-laser light is used to excite the phosphor to obtain fluorescence. The projection system performs projection imaging based on the first sub-laser light, the first blue laser light, and the fluorescence.

The present invention provides a phosphor wheel, light source device, and projector that can improve light utilization efficiency and reduce laser speckle. [Solution] A phosphor wheel 23 having phosphor regions 23r and 23g that convert the wavelength of blue laser light, and which rotates in response to the drive of a rotation mechanism, comprising a red phosphor region 23r that converts blue laser light to red laser light, a green phosphor region 23g that converts blue laser light to green laser light, and a transparent region 23b that transmits blue laser light, the transparent region 23b transmitting blue laser light through a microlens array.

After the irradiation with the blue laser beam, in a cross section of the stacked metal foils along a stacking direction of the copper-based foils, intervals between the adjacent copper-based foils along the stacking direction in a vicinity of a melted region generated in the stacked metal foils are smaller than a thickness of each of the copper-based foils.

A projection light source (100) and a projection apparatus. The projection light source (100) comprises a three-color laser light source (101); a red LED light source (102); a blue laser light source (103); a phosphor plate (104) arranged on a light-emitting side of the blue laser light source (103) and used for converting blue laser light into green fluorescence; and a compound-eye module (105) arranged on light-emitting sides of the three-color laser light source (101), the red LED light source (102) and the phosphor plate (104), the compound-eye module (105) being used for homogenizing red laser light, blue laser light, green laser light, red light and green fluorescence and then transmitting same.

The present invention provides a lighting system that combines tri-color pure lasers and phosphors and a projection device thereof. The lighting system helps to improve the phenomenon of laser speckle and includes a laser light source module, a wavelength converter, a segmented dichroic mirror, and a light homogenizing component. The laser light source module is configured to provide blue, green, and red laser beams. The wavelength converter is configured to reflect the tri-color laser beams and convert the blue laser beam into an excitation beam. The segmented dichroic mirror is configured to reflect the tri-color laser beams and at least a portion of the excitation beam from the wavelength converter. The light homogenizing component is configured to receive and homogenize the tri-color laser beams and at least a portion of the excitation beam from the segmented dichroic mirror to provide an illumination beam.

The invention discloses an SMD power extremely-white laser device, and belongs to the technical field of laser emitters, the SMD power extremely-white laser device comprises an SMD supporting component, a mounting bracket, an edge-emitting blue laser chip and a wavelength conversion device, the SMD supporting component comprises an SMD base and an annular support, the heat dissipation surface of the SMD base is used for being mounted on a heat dissipation device, and the annular support is mounted on the mounting surface of the SMD base; the mounting bracket is mounted on the mounting surface, and the mounting bracket is provided with a chip fixing plane vertical to the mounting surface; the edge-emitting blue laser chip is fixed on the chip fixing plane, and the emitting direction is opposite to and perpendicular to the mounting surface; the wavelength conversion device is installed on the annular support and located on the emission path of the edge emission blue laser chip. The white laser can be emitted, heat generated by the chip emitting the blue laser at the same time can be effectively dissipated, the white laser power can be made high, and the high-brightness laser requirement is met.

The invention provides a laser. The laser comprises a first contact layer, a first limiting layer, an active region layer and a substrate which are arranged along a first direction, wherein grating structures are integrated on the first contact layer and the first limiting layer; the active region layer comprises a multi-layer quantum well structure, and the active region layer is used for generating blue laser. The scheme can support generation of blue laser with narrow linewidth so as to improve the quality of blue light generated by the laser, and further support realization of a high-quality single-mode blue light source; besides, through the narrow linewidth design, the spectral characteristics of the laser can be more concentrated, so that the number of optical elements needing to be adjusted or optimized is reduced, and the system design and maintenance are simplified; the problem that blue light generated by a laser in the prior art cannot meet the quality requirement is well solved.

There is provided a laser welding method for stacked metal foils including a plurality of stacked copper-based foils. The laser welding method includes: vertically stacking the plurality of copper-based foils; arranging the stacked metal foils on a jig in a blue laser welding system; and irradiating the stacked metal foils with a blue laser beam set to face toward a prescribed direction. After the irradiation with the blue laser beam, in a cross section of the stacked metal foils along a stacking direction of the copper-based foils, a width in a lower end portion of a melted region generated in the stacked metal foils is larger than a width in a central portion of the melted region.

The invention discloses a perovskite quantum dot glass film composite material and a preparation method and application thereof. The preparation method comprises the following steps: blending glass powder containing CsPb (BrxI1-x) 3 quantum dots with an organic carrier to obtain heat conduction slurry; spin-coating the sapphire substrate with the heat-conducting slurry; the sapphire substrate coated with the heat conduction slurry is subjected to stepped heat treatment, and the heat treatment comprises a glue discharging step at the temperature of 150-250 DEG C and a high-temperature dense bonding step at the temperature of 500-600 DEG C, so that interface bonding between the glass film and the sapphire substrate is achieved. According to the invention, the interface-bonded perovskite quantum dot glass film is constructed on the sapphire substrate, so that the problem of hot stacking is effectively solved. The prepared composite material has a heat conductivity coefficient as high as 34.81 W / m.k, and a fluorescent color wheel device assembled based on the composite material shows a wide color gamut (the heat conductivity coefficient reaches 93.7% under the Rec.2020 standard) and high working stability under excitation of blue laser, and has a wide application prospect in the field of laser display.

The invention relates to the technical field of display, and discloses a light source system and projection equipment, and the light source system is characterized in that emitted laser is dodging through two compound eyes, the speckle problem can be improved, and the uniformity of a picture projected by the projection equipment is improved; meanwhile, a fluorescent wheel is adopted in the light source system, laser is mixed with fluorescent light, and the advantages of the two kinds of light can be combined, so that the comfort degree of human eyes is greatly improved, the color gamut is high while the color edge problem of the laser is avoided, the contrast ratio is improved, and the image quality of the projection equipment can be improved; moreover, after the fluorescent light and the blue laser are emitted from the fluorescent wheel, light paths are separated, so that the residual blue light can be effectively reduced, and the color gamut of the projection equipment is improved. And a compound eye framework is adopted, so that the advantages of volume and efficiency are achieved.