7 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.

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.

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.

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).