14 results about "Exit angle" patented technology

A lidar, a mobile system and a laser detection method. The lidar comprises: a rotating platform (10), at least two transceiver modules (11) fixed on the rotating platform (10), and a driving module configured to drive the rotating platform (10) to rotate about an axis of rotation (L) as a center, wherein each transceiver module (11) comprises a transmitting assembly configured to emit at least two laser beams having different exit angles, and a receiving assembly configured to receive echo signals of the emitted laser beams that are reflected by an object; the at least two transceiver modules (11) are arranged around the axis of rotation (L); the field-of-view ranges of at least two detection modules in a direction perpendicular to the axis of rotation (L) are staggered; and at least two annular field-of-view ranges respectively formed by the at least two transceiver modules (11) during rotation are stitched to form a larger annular field-of-view range. The lidar is low in terms of costs and can flexibly form different field-of-view ranges.

This invention discloses a high-precision white light adjustable aperture device for various operating conditions. It is characterized by comprising two absorber assemblies, each with an absorber assembly attitude adjustment mechanism, a two-dimensional precision displacement system, and a two-dimensional precision displacement system adjustment mechanism located below it. The upstream and downstream absorber assemblies are used to receive synchrotron radiation and adjust its exit angle. The two-dimensional precision displacement system adjustment mechanism is used to adjust the attitude and height of the two-dimensional precision displacement system. The two-dimensional precision displacement system is used to control the horizontal and vertical displacement of the absorber assembly. The absorber assembly attitude adjustment mechanism is used to adjust the attitude of the absorber assembly. This invention can simultaneously receive multiple types of synchrotron radiation, achieving the function of using a single adjustable aperture device to handle multiple different operating conditions within the limited space of the front-end area.

A detection device (10), a UAV, a control method and device of the detection device (10). A light pulse sequence emitted by a light source (111) in the detection device (10) passes through a scanning module (12) and can change its propagation direction by an optical module (121, 122) in the scanning module (12), wherein the optical module (121, 122) moves under the drive of a drive module, and the optical module (121, 122) changes the direction of the light pulse sequence, so that the light pulse sequence is emitted from at least two different exit angle ranges, thereby forming at least two different scanning fields of view, and the light pulse sequence of different scanning fields of view can return to a detector in the detection device (10) after being reflected by an external object, and the detector detects the at least two scanning fields of view through the received light pulse sequence. The light pulse sequence emitted by the light source (111) is divided into at least two light pulse sequences by the optical module (121, 122), and then emitted from different exit angle ranges, thereby forming at least two different scanning fields of view, so that the field of view angle of the scanning field of view of the detection device (10) can be increased.

The invention relates to the technical field of 3D (three-dimensional) sensors, and discloses a high-precision high-magnification imaging method for a 3D line laser sensor, which comprises the following steps: a light ray enters a first lens with a narrow-band coating film, and the light ray with non-405nm wavelength is filtered and then enters a second lens, so that the light ray is gathered; the gathered light enters the third lens to reduce the distortion of the light, and then sequentially enters the fourth lens, the diaphragm and the fifth lens to optimize the incident angle of the light; light emitted from the fifth lens enters the sixth lens, spherical aberration caused by the first lens, the second lens, the third lens, the fourth lens and the fifth lens is effectively compensated through the sixth lens, the light is deflected, and the angle when the light is emitted is reduced; the light emitted from the sixth lens sequentially enters the seventh lens and the eighth lens to deflect the light angle; light emitted from the eighth lens sequentially enters the first reflective mirror and the second reflective mirror, so that the total length of the high-precision and high-magnification imaging lens is shortened, and the light receiving efficiency is improved by controlling the angle at which the light enters the CMOS.

The application discloses a signal transmitting and receiving method and device based on a reconfigurable refractive metasurface, the method comprising: sending a first pilot sequence to a user, and feeding back the received signal by the user; receiving the feedback of the first pilot sequence by the user, and estimating the channel between the feed source and the reconfigurable refractive metasurface, the channel between the reconfigurable refractive metasurface and the user, the incident angle of the feed source to each unit of the reconfigurable refractive metasurface, and the exit angle of each unit of the reconfigurable refractive metasurface to the user based on the feedback; designing the state of each unit of the reconfigurable refractive metasurface in the data transmitting and receiving stage according to the channel, the exit angle and the incident angle; and transmitting and receiving data based on the designed state of the reconfigurable refractive metasurface. The application can accurately estimate the response of the RRS unit, thereby improving the performance of the RRS antenna beam forming, and improving the system data transmission rate.

Optoelectronic arrangement (1) with - at least two semiconductor laser devices (10) configured to emit electromagnetic radiation, and - an optical superposition element (20) with at least one radiation entry surface (20A) and one radiation exit surface (20B), wherein - each semiconductor laser component (10) is assigned an optical component (30), - each semiconductor laser device (10) emits a plurality of spatially separated entry beams (R1), - all incoming beams (R1) of a semiconductor laser device (10) pass through the respective associated optical element (30), wherein several incoming beams (R1) emitted by a semiconductor laser device (10) are fanned out against each other after passing through the optical element (30) in such a way that the incoming beams (R1) enter the optical superposition element (20) at different angles of incidence (α), and - Entrance beams (R1) from different semiconductor laser devices (10) exit at the radiation exit surface (20B) of the optical superposition element (20) superimposed in a plurality of exit beams (R2), wherein - the optical elements (30) have a distance (D) from the optical superposition element (20), - the distance (D) of each optical element (30) is set such that the entrance beams (R1) from different semiconductor laser elements (10) exit together in common exit beams (R2) at the radiation exit surface (20B) of the optical superposition element (20). - the exit beams (R2) superimposed at a common point leave the optical superposition element (20) at a common exit angle (β), - each semiconductor laser device (10) comprises a plurality of waveguides (101) each emitting an entrance beam (R1), and - the waveguides (110) of a semiconductor laser device (10) can be controlled independently of each other.

The application discloses a laser radar beam scanning system based on a combination of a super lens and a refractive lens, which comprises laser radars, refractive lenses and super lenses arranged at intervals; scanning beams with different exit angles of the laser radars are focused by the refractive lenses and then deflected by the super lenses; wherein the super lens has a nano structure layer composed of a nano structure array, and the deflection angles of all scanning angles are equal to a target deflection angle through weighting optimization of the deflection angle and the divergence angle. The nano structure layer can realize large-angle deflection of the scanning beams, is not sensitive to the polarization angle, solves the problem that the existing laser radar beam scanning system cannot simultaneously realize large scanning angle, small system volume, high scanning speed, high resolution and long detection distance, is favorable for realizing high-performance beam scanning effect and can meet the beam processing of various scanning angles.

This invention belongs to the field of micro-nano photonics technology and discloses a metasurface and its design method, as well as a holographic imaging method. The invention first constructs the basic structure of the metasurface, including a substrate layer, a waveguide layer, and a structural layer. The substrate layer and waveguide layer are divided into unit cells of uniform size, and the structural layer includes several nanobricks, with one nanobrick disposed on the working surface of each unit cell. Using the directions parallel to the two edges of the working surface of the unit cell as the x-axis and y-axis, the displacement of each nanobrick within its unit cell along the x-axis and y-axis is determined based on the phase modulation values ​​corresponding to multiple two-dimensional diffraction orders. After incident light is incident on the metasurface provided by this invention, a camera captures multi-order holographic images; wherein, different holographic images are captured at different exit angles under different second-order diffraction orders. This invention can broaden the encoding capacity and expand the field of view under relaxed processing conditions.

The invention discloses a nondestructive testing method for through-type screw dislocation defects of a silicon carbide material, and belongs to the technical field of silicon carbide dislocation defect characterization. The nondestructive testing method provided by the invention comprises the following steps: carrying out first diffraction geometric selection based on an X-ray morphology testing system, n being a multiple of 4; an incident angle theta S, an emergent angle theta D and a sample rotation angle phi are calculated, and then parameter optimization is carried out by using rocking curve scanning and curvature calibration; performing imaging based on the optimized parameters to obtain an XRT image of the TSD; and performing dislocation automatic identification on the XRT image to obtain dislocation information of the TSD. The method provided by the invention can realize nondestructive detection of TSD defects in the silicon carbide material, has the advantages of high detection accuracy, low detection cost and simple sample preparation, and can effectively distinguish TpSD and TMD in TSD.

The present application relates to the technical field of animal repelling, and particularly relates to a bird repelling device, a control method, a terminal and a storage medium. The bird repelling device embodiment of the present application is provided with a focusing module, different sunlight irradiation angles are adjusted to be uniform exit angles, sunlight is collected, and a light beam is formed. Therefore, the obtained light intensity is high, the irradiation intensity can be significantly improved, and the irradiation spot is large, so that the locking of the repelling target is easily realized. The bird repelling control method disclosed in the present application embodiment is used for identifying and positioning the position in the image by dividing the image into image blocks through images with different visual angles, and positioning the position of the repelling target through the positions in multiple images. Therefore, the positioning precision is high, the sunlight irradiation when the attitude of the reflector is controlled is targeted, and the repelling effect is significant.

The invention belongs to the technical field of optical diffusion devices, provides a variable diffusion angle diffusion sheet based on refractive index regulation and control and a preparation method thereof, and is widely applied to an illumination system, a three-dimensional measurement system, light field regulation and control, a backlight module and a display and imaging system. A transparent optical adhesive layer with a controllable refractive index is tightly attached to a scattering surface of a traditional rough surface type diffusion sheet (such as ground glass, sand blasting glass and the like), and refraction paths of light rays between the scattering surface and the adhesive layer and between the adhesive layer and an air interface can be effectively changed by changing the refractive index of the adhesive layer, so that regulation and control of overall emergent angle distribution are realized; on one hand, the angle-variable diffusion sheet has the advantages of being simple in structure, low in cost, simple in process, high in stability and the like; on the other hand, compared with an existing adjustable diffusion technology depending on an electric control liquid crystal or a complex variable structure lens, the key problems of high cost, high manufacturing difficulty, limited optical power tolerance and the like are effectively solved.

A retro-reflector comprising a front boundary surface configured for entry of measuring light into the retro-reflector and a back boundary surface configured for reflecting the measuring light as reflected measuring light. The front boundary surface and the back boundary surface are arranged on opposite sides of the retro-reflector, and an optical axis is defined by the arrangement of the front boundary surface and / or the back boundary surface of the retro-reflector, wherein an incidence angle of the measuring light relative to the optical axis is equal to an exit angle of the reflected measuring light relative to the optical axis. A first optical element is provided comprising the front boundary surface, and a second optical element is provided comprising the back boundary surface.

The object of the present invention is to provide a lens and an optical system device capable of measuring the optical properties of a light source or optical element with a simple structure. The lens (1) has an optical axis and includes an incident surface (F) and an exit surface (B). The incident surface (F) and the exit surface (B) are configured such that light incident from a first position (O) at an illumination angle (θ) relative to the optical axis onto the incident surface (F) is refracted by the incident surface (F) and the exit surface (B) and exits from the exit surface (B) at an exit angle θ / m (m>1) relative to the optical axis. The apparent position of the light exiting from the exit surface (B) all starts from a second position (P). In addition, the optical system device includes the lens (1) and a diffuser plate for diffusing the light emitted from the lens (1).

The application discloses an optical device based on a transformed material curved wave beam and an implementation method, and belongs to the technical field of transformed materials and optical signal processing technology.The optical device comprises an input surface, a two-dimensional straight-edge Eaton lens based on a transformed material curved wave beam and an output surface.The application adopts a transformed optical method to transform a traditional Eaton lens into a straight-edge lens, obtains a transformation relationship between the traditional Eaton lens through conformal transformation, and then obtains medium parameters by using a transformed material method.The incident angle and the exit angle of light on the transformed two-dimensional straight-edge Eaton lens remain unchanged, the light rays which are at the same angle with the normal line of each point of the input surface in the traditional Eaton lens are equivalent to parallel light rays after transformation, the incident angle of the light rays is equal to the exit angle, the propagation path of the wave beam is changed with the change of the incident angle, the wave beam path can reach a very wide curved angle, and variable-angle turning can be realized in a single device;the isotropy is ensured, and the preparation in engineering is facilitated.