3results about How to "Reduce diffraction effects" patented technology

The application provides a light-emitting chip and a laser light source. The light-emitting chip comprises a substrate, an N electrode, an N-type Bragg mirror set, an active layer, a current blocking layer, a P-type Bragg mirror set and a P electrode. The current blocking layer is formed on the active layer, and a current injection aperture is formed in a central region of the current blocking layer. The P-type Bragg mirror set is formed on the current blocking layer, and the projection of the P-type Bragg mirror set on the active layer is larger than the current injection aperture along the injection direction of the current. The P electrode is formed on the P-type Bragg mirror set. A PN junction depletion region is formed at the junction of the current blocking layer and the P-type Bragg mirror set. The PN junction depletion region is used to prevent the current from flowing into the current blocking layer, so that the current is injected into the active layer through the current injection aperture, thereby improving the injection efficiency of the current in the active layer, and more electrons and holes can be combined in the active layer, thereby improving the electro-optical conversion rate and the light-emitting quality of the light-emitting chip.

This invention discloses an optimization device and method for laser spot edge diffraction, relating to the field of optical instrument technology. The optimization device includes two sets of guiding mechanisms, two sets of driving mechanisms, and two sets of aperture pairs. Each aperture pair includes two opposing aperture plates, the edges of which are used to define the light transmission boundary and have a serrated structure. The driving mechanisms drive the two aperture plates in the same set to move synchronously in opposite directions along the guiding direction. The positions of the two aperture pairs are independently controlled to combine and form different light transmission boundaries. In the optimization method, the positions of the two aperture pairs are adjusted according to the edge morphology of the laser beam to be optimized, and the laser beam is made to pass through the target light transmission boundary for edge intensity modulation. Through the technical solution of this invention, the edge diffraction caused by traditional straight-edge apertures is reduced, and the edge smoothness of the laser beam, the flexibility of light transmission boundary adjustment, the adaptability to different spot morphologies, the shaping consistency, and the processing stability are improved.

The utility model belongs to the technical field of beam limiting devices, and particularly relates to a shielding assembly for a speed limiter and an adjustable shielding device. The fixed lead window comprises a fixed bracket and a rounded rectangular lead window, and a rectangular opening is formed in the lead window; the aperture adjusting part comprises a base and a pressing ring, an annular groove is formed in the base, a rotatable rotating disc is arranged in the annular groove, the pressing ring is used for abutting the rotating disc into the annular groove, a plurality of radial sliding grooves are formed in the rotating disc, and a plurality of shielding blades stacked layer by layer are arranged between the rotating disc and the base. The upper ends and the lower ends of the shielding blades are hinged to the rotating disc and the base through upper pin shafts and lower pin shafts respectively, the upper pin shafts are slidably installed in the radial sliding grooves, the rotating disc is rotated so that the upper pin shafts can slide in the radial sliding grooves in the direction close to or away from the center of the rotating disc, and the upper ends of the shielding blades are driven to be close to or away from each other. The shielding range of the shielding blade is adjusted; the shielding efficiency, the shielding utilization rate and the imaging quality of the beam limiting device are improved.