9results about How to "Small spot" patented technology

The invention discloses a laser welding process of a neodymium iron boron Halbach magnetic assembly. The laser welding process comprises the following steps: firstly, arranging a plurality of magnetized magnets in a Halbach array form; then glue is dispensed on the butt joint faces between the adjacent magnets, and the multiple magnets are glued to form a Halbach magnetic assembly; next, adjacent magnets are welded and fixed on the weak magnetic surface of the Halbach magnetic assembly in a nanosecond laser welding mode; glue is dispensed at the welding position, and the welding seam is filled and covered with glue while the Halbach magnetic assembly and the magnet fixing piece are fixed in a glue joint mode. According to the method, the Halbach magnetic assembly is assembled in the mode that glue joint is conducted firstly and then nanosecond laser welding is conducted, the welding operation is easy to conduct, the welding position is accurate, and magnetic performance attenuation can be controlled within a small range.

The application provides a full-angle laser combustible gas remote measuring device and a detection method, and relates to the technical field of combustible gas detection. The device comprises a remote measuring instrument body, a laser emitter, a lens group, a detector and an aperture assembly. The lens group reciprocally moves along the light transmission direction to adjust the waist position of the outgoing laser beam. The aperture assembly is arranged in the receiving light path and in front of the light entrance side of the detector, and comprises a plurality of aperture plates arranged in sequence. The aperture plates are provided with light transmission holes. The apertures gradually decrease in size along the direction away from the detector. The aperture plates are located in the waist area of the receiving light beam. When the lens group moves to different positions, the corresponding light transmission holes are driven to cut into the receiving light path. The farther the lens group is away from the laser emitter, the smaller the aperture of the cut-in light transmission hole. In the wide-area scanning, the large aperture is cut in to expand the receiving field of view. In the long-distance precision measurement, the small aperture is cut in to block stray light and improve the detection precision. The lens group moves synchronously to complete the waist adjustment and aperture switching, and adaptive switching of the two modes is realized.

The utility model discloses an anti-dazzle automobile LED lamp which comprises a first reflecting cover, a second reflecting cover, a low-beam LED lamp bead, a high-beam LED lamp bead, a light transmitting mirror and a lens fixing frame. A first containing cavity and a second containing cavity are formed in the upper end and the lower end of the surface of the lamp holder respectively, a prismatic surface structure is arranged on the surface of the light-transmitting mirror, and the first reflecting cover is used for reflecting light emitted by the high-beam LED lamp beads towards the lower area of the light-transmitting mirror. The second reflecting cover is used for reflecting light emitted by the low-beam LED lamp beads towards the upper area of the light transmitting mirror. According to the utility model, the first reflecting cover and the second reflecting cover are arranged on the lamp holder, so that light rays of high beam and low beam can be accurately guided to a required area, the light rays are prevented from directly irradiating into sight lines of opposite vehicles or pedestrians, and the glare phenomenon is effectively reduced; the prism surface structure is arranged on the light-transmitting mirror, so that light can be better dispersed, the coverage range and the uniformity of road illumination are improved, and the glare phenomenon is effectively reduced.

This invention belongs to the field of optical communication technology, specifically providing a multi-film TOSA packaging structure, including a TO-CAN and an optical fiber adapter. The optical fiber adapter is installed at the cap end of the TO-CAN and forms a mirror cavity with the TO-CAN. A first collimating lens, a second collimating lens, and a filter are disposed within the mirror cavity. The first collimating lens, the filter, the second collimating lens, and the optical fiber port of the optical fiber adapter are arranged sequentially along the emission optical path of the TO-CAN. The filter is used to prevent reflected light from entering the TO-CAN or the optical fiber port. This multi-film TOSA packaging structure provided by this invention is highly integrated. The collimating lens converts the laser light output into parallel light, resulting in a small spot size, facilitating optical path transmission, and reducing energy loss. Through the cooperation of the collimating lens and the filter, reflected light in the optical path does not affect signal quality in the TOSA coaxial package, meeting specification requirements and achieving hermetic packaging.

The invention discloses a multi-pigtail laser output pumping source. The multi-pigtail laser output pumping source comprises a pumping light module, a shaping assembly and a plurality of coupling optical fibers, wherein the pump light module is used for outputting a single collimated light beam; the shaping assembly is arranged on an output light path of the collimated light beam and comprises a focus lens and a beam splitting element which are arranged in sequence, the beam splitting element is used for splitting the focused collimated light beam to form multiple sub-light beams and outputting the sub-light beams, and the sub-light beams are respectively coupled into the corresponding coupling optical fibers after being emitted from the beam splitting element. According to the pumping source provided by the invention, multi-beam output of a single pumping source is realized through the beam splitting element; and moreover, the light beams output by the pumping source are subjected to beam splitting treatment, so that light spots of the light beams received by each coupling optical fiber are smaller, the light density is increased, and the brightness of each final output light beam is improved.

The invention relates to the technical field of optical measurement, and discloses a semiconductor structure doping concentration distribution measurement system comprising an excitation module used for generating excitation light; the light splitting module is located on a light path of the exciting light and used for splitting the exciting light into first power light and second power light, and the first power light is used for irradiating a sample to be detected; the measuring module is located on the light path of the second power light and used for measuring the power of the second power light; and the acquisition module is used for acquiring a spectral signal of the test light generated by the sample to be tested under the excitation of the first power light. According to the embodiment of the invention, non-contact and nondestructive measurement of the doping concentration distribution of the semiconductor structure can be realized.

The utility model relates to detection field, concretely is a kind of multi-angle, multi-posture visual inspection device based on special-shaped netted component, including detection bench and the visual inspection module of being used in conjunction with detection bench, the detection bench includes rotating platform fixed on positioning platform, and rotating platform is spaced apart and is provided with the detection seat for receiving and negative pressure adsorption material, and detection seat and visual inspection module plumb position correspond;Detection seat rotates with rotating platform to produce swing action, and rotating platform is also provided with rotating power source that rotates detection seat around its own axis is driven to rotate.This utility model makes the attitude of material be fixed after negative pressure stable adsorption material, improves the stability under repeated action, realizes the multi-angle visual inspection of material by the pitching action of rotating platform and the rotation of detection seat, realizes the multi-view visual inspection of material under multi-angle multi-posture, significantly improves the comprehensiveness and precision of material visual inspection.

The invention discloses a light source device and an optical imaging system. The first laser light source comprises a first laser module and a second laser module, the first laser module is used for generating first laser, and the second laser module is used for generating second laser. The second laser light source comprises a third laser module and a fourth laser module, the third laser module is used for generating third laser, and the fourth laser module is used for generating fourth laser. The first polarization light combination module is arranged on a light path where the first laser and the third laser are located and used for generating first mixed light. The second polarization light combination module is arranged on the light path where the second laser and the fourth laser are located and used for generating second mixed light. The wavelength light combination module is arranged on a light path where the first mixed light and the second mixed light are located. According to the light source device in the embodiment, light combination is conducted on multiple paths of laser in the mode that polarization light combination is conducted firstly and then wavelength light combination is conducted, light spots of finally generated emergent light can be small, and the design difficulty and hardware cost of elements in a follow-up light path are reduced.

The invention discloses a passport reader, and relates to the technical field of readers, the passport reader comprises a shell, a camera shooting assembly, a lamp panel and a reflection structure, the top of the shell is provided with a transparent placement area, the camera shooting assembly is arranged in the shell and is far away from the bottom of the shell, the lamp panel is arranged at the bottom of the shell and is arranged towards one end far away from the transparent placement area, and the reflection structure is arranged in the transparent placement area. The light source emitting end of the lamp panel faces the transparent placing area, and the reflection structure is installed in the shell and used for reflecting an image of the transparent placing area to the shooting end of the camera shooting assembly. According to the technical scheme, the problems that light rays emitted by a lamp panel of an existing passport reader are prone to generating light spots on a passport, the light rays are not uniform enough, shooting of a camera is not clear, and the imaging definition is not high are solved.