49results about How to "Optimize energy distribution" patented technology

The invention discloses an interferometric fiber-optical sensor based on a core shift structure. The interferometric fiber-optical sensor based on the core shift structure comprises introducing single-mode optical fibers, sensing single-mode optical fibers, multimode optical fibers, leading-out single-mode optical fibers and a spectrograph. The introducing single-mode optical fibers are used for receiving and transmitting light beams from a light source, and outputting the light beams to the sensing single-mode optical fibers. The sensing single-mode optical fibers are in core shift fusion welding relative to the introducing single-mode optical fibers and are used for generating interference and enabling the interfered mode to be coupled to the multimode optical fibers. The multimode optical fibers enable the interfered mode to be coupled to the introducing single-mode optical fibers so as to achieve outputting. The spectrograph is used for executing transmitted spectrum detection on the interfered mode output by the introducing single-mode optical fibers and obtains sensing data correspondingly according to a detection result. The invention further discloses a corresponding manufacturing method. By means of the interferometric fiber-optical sensor based on the core shift structure and the manufacturing method thereof, indeterminacy caused by the offset direction is effectively avoided, the extinction ratio of the entire sensing system can be improved obviously, and meanwhile an optical fiber sensor which is high in sensitivity and convenient to manufacture and package is obtained.

The invention discloses a diffusion rotating device which is arranged on a transmission path of a light beam. The diffusion rotating device comprises a substrate, a rotating shaft and a driving element. The rotating shaft is connected to substrate. The driving element is connected to the rotating shaft and used for driving the rotating shaft to rotate. The substrate comprises a first diffusion region and an optical region which are adjacently arranged, the first diffusion region is provided with a plurality of first diffusion sub-regions, and each first diffusion sub-region extends along the circumferential direction of the substrate and the plurality of first diffusion sub-regions are concentrically arranged along the radial direction of the substrate; when the first diffusion region cutsinto a transmission path of a light beam, the light beam forms a first light spot on the first diffusion region of the substrate; in the radial direction of the substrate, the diffusivity of the first diffusion sub-region corresponding to the central part of the first light spot in the plurality of first diffusion sub-regions is greater than the diffusivity of the first diffusion sub-region corresponding to the edge part of the first light spot. A projection device is also provided. Therefore, the projection device applying the diffusion rotating device has good optical efficiency.

The present invention provides a method for improving the toughness of additively manufactured samples, which includes the following steps: (1) single-pass forming process: obtain single-pass morphology under different laser forming processes, and select forming conditions corresponding to continuous and uniform melt paths; 2) Change the laser scanning strategy to print a cuboid with different scanning line spacing; (3) Cut a small square from the end of the cuboid, grind the six sides of the small square and conduct a density experiment to obtain the density; After the annealing treatment of the cuboid of the small square, it is processed into a tensile strip by wire cutting, and the stress-strain curve and toughness value of the printed part are obtained through the tensile test; (5) Analyze the fracture morphology of the stretched strip, and select a reasonable scan Line spacing value for strong, tough prints. This method improves the energy distribution of the laser acting on the material, reduces thermal stress, and is conducive to obtaining printed samples with high surface precision and good toughness; it is simple and easy to implement, and is conducive to meeting the needs of the 3D printing industry.