7 results about "Beam size" patented technology

This invention discloses a system for evaluating the energy distribution of oblique-spot laser beams in additive manufacturing, relating to the field of laser process measurement. The system includes: a motion execution module for driving a laser emitting unit to adjust its pose in three-dimensional space; a detection and judgment module for determining in real-time whether the beam size exceeds a preset measurement range during laser scanning and outputting a mode selection signal accordingly; a dual-mode measurement module for selectively activating a first or second measurement subunit in response to the mode selection signal; and a data processing and modeling module for establishing the functional relationship between beam size and energy attenuation as a function of defocus distance, and calculating an analytical expression for the energy distribution on the target working plane when the laser is incident at an arbitrary angle. This application's solution revolutionizes the process of evaluating the energy distribution of oblique-spot laser beams into a rapid analytical calculation based on actual measurements, thereby providing crucial information for the real-time optimization of additive manufacturing process parameters.

One of objects of the present application is to provide a technique for reducing a fabrication time while preventing or reducing the occurrence of fume and spatter in an AM apparatus.According to one aspect, an AM apparatus configured to manufacture a fabricated object is provided. This AM apparatus includes a beam source configured to irradiate a material of the fabricated object with a beam, an adjustment device configured to adjust an intensity of the beam, a beam adjustment mechanism configured to adjust a beam size on the material, and a fabrication recipe determination device. The fabrication recipe determination device is configured to determine the intensity of the beam and the beam size on the material based on a property of the material of the fabricated object.

The present disclosure provides a target tracking system, method and electronic device, relates to the technical field of medical treatment, and particularly relates to the technical field of tumor tracking. The target tracking system comprises a beam emitting device, a collimator and a detector. The beam emitting device comprises a ray source and a beam former. The beam size of the beam former is adjustable. The collimator is located between a target object and the detector, and is used for limiting the scattered rays. The detector is used for receiving the transmitted rays and the scattered rays limited by the collimator, so as to generate a transmission image and a scatter image of the target object. A processor is used for acquiring the transmission image and the scatter image of the target object in at least one direction, and tracking the target object based on at least one type of image in the transmission image and the scatter image of the target object in the at least one direction. Through the above system, the transmission image and the scatter image of the target object in at least one direction can be acquired, and the tumor can be accurately positioned.

This invention discloses a metasurface design method, a beam shaping device, and an electronic device. The metasurface design method includes: defining input and target light field parameters, and setting boundary constraints for beam size preservation; obtaining the desired phase distribution based on the input light field, boundary constraints, and target light field using a geometric mapping method or an iterative Fourier transform algorithm; and generating the metasurface based on the phase distribution. The metasurface design method, beam shaping device, and electronic device of this invention can achieve strict beam size preservation, high-performance beam quality, and excellent broadband and angular robustness, providing a compact, efficient, and robust illumination solution for high-precision ultraviolet lithography systems, overcoming problems such as size mismatch, poor uniformity, and weak environmental adaptability in existing technologies.

This invention belongs to the field of optical communication technology, specifically providing a COMBO PON optical device, including a transmitter assembly and a housing with a mirror cavity; the housing has an optical port, an optical transmitting port, and multiple optical receiving ports; the mirror cavity contains a beam splitter for splitting the incident combined light entering through the optical port; the transmitter assembly includes a PBS assembly and multiple lasers; the PBS assembly is located on the output optical path of the lasers; the beam splitter and the optical port are sequentially arranged on the output optical path of the PBS assembly. The use of a PBS in the transmitter structure reduces other passive components, ensures maximum coupling efficiency and beam quality, and requires less space. The optical path is designed as parallel light, lengthening the optical path while improving the coupling efficiency between the laser and the detector. The overall structure of this optical device, while ensuring that the optical path and beam size are not affected and the structure is reliable, improves coupling efficiency through optical simulation.

An optical ferrule assembly includes an optical ferrule including an attachment area, a light input surface and a light output surface; an optical fiber having a fiber end where the light input surface and the fiber end defines a gap therebetween substantially filled with an adhesive, such that light propagating along the optical fiber and having a peak intensity I1≥3 GW / m2, exits the fiber end and enters the optical ferrule through the light input surface after traversing the gap through the adhesive, and exits the optical ferrule through the light output surface. The exiting light has a first beam size, such that after at least 100 hours of aging of the optical ferrule assembly, any change in the first beam size due to a photodegradation of the adhesive is no more than about 10%. The adhesive can be prepared by photocuring an optical adhesive formulation.

This utility model relates to the technical field of laser light adjustment, specifically a laser light with beam size adjustment function. It includes a base, a lamp tube mounted at the bottom of the base, a threaded rod and a movable plate inside the lamp tube, the top of the threaded rod connected to a drive component inside the base, and the movable plate threadedly connected to the threaded rod. A lamp holder is mounted at the bottom of the movable plate, and a laser light is detachably mounted on the bottom of the lamp holder. Two interlocking semi-circular ring clamping sleeves are detachably mounted at the bottom of the lamp tube. The inner wall of each semi-circular ring clamping sleeve has a clamping groove, which together clamps a convex lens. A transparent protective cover is detachably mounted at the bottom of the semi-circular ring clamping sleeves. The position of the laser light is adjusted by the threaded rod and the movable plate, thus achieving beam size adjustment. The detachable semi-circular ring clamping sleeves also facilitate the replacement and installation of the convex lens, resulting in better performance.