A method and system for simultaneously measuring multiple DOF GEs by a laser. The system comprises a measuring unit and a target mirror unit; the measuring unit comprises a laser emitting module, a polarizing beam splitter, a fixed reflector, a first λ/4 wave plate, a second λ/4 wave plate, a first polarizer, a first photodetector, an interference length measuring module and a 2D angle measuring module. The target mirror unit comprises a beam splitter and a reflector. The laser emitting module generates an emitting light L1. The polarizing beam splitter is used for (1) beam splitting, (2) beam combining, and (3) beam separating. The fixed reflector is used for reflecting backward the reference light L12 propagating only inside the measuring unit to return the reference light L12 to the polarizing beam splitter. The present invention can realize a simultaneous and rapid measurement of 5/6DOF GEs of a space object moving linearly along a linear axis; and a relative drift of position and attitude of two objects with 5/6DOF in a space can be longtime monitored.

A system for simultaneously measuring 3DOF LGEs by a laser and a method therefor, including a measuring unit and a target mirror unit, the measuring unit includes a laser emitting module, a polarizing beam splitter, a fixed reflector, a first photodetector, and an interference length measuring module; the target mirror unit includes a reflector; the laser emitting module generates an emitting light L1, the polarizing beam splitter is used for 1) “beam splitting” comprising splitting the emitting light L1 into a measuring light L11 and a reference light L12, the measuring light L11 is incident on the target mirror unit and is reflected back by the target mirror unit, so as to return to the measuring unit with a 3DOF LGEs signal; and 2) “beam combining” making the measuring light L11 and the reference light L12 superposed with each other at a spatial position, so as to form a combined beam L3; by measuring a position, frequency and phase drifts of the light L3, the 3DOF LGEs of a space object moving linearly along linear axes can be rapidly measured simultaneously; or a longtime monitoring 3DOF linear position drifts of two objects in space can be realized.

The present application discloses improvements that can be implemented in a laser detection and ranging (LiDAR) device to achieve accurate obstacle detection and to reduce measurement errors. A LiDAR device uses laser beams to scan a surrounding region to detect and identify objects. In one embodiment, the LiDAR control system is configured to refine a scanning region based on scanning results. The LiDAR control system may divide a scanning region into multiple sub-areas for differentiated scanning efforts. For example, the LiDAR control system may select a sub-area for enhanced scanning, e.g., with increased resolution. Methods for achieving scanning accuracy, increasing signal robustness, and reducing reflective noises are also disclosed.

The present application discloses improvements that can be implemented in a laser detection and ranging (LiDAR) device to achieve accurate obstacle detection and to reduce measurement errors. A LiDAR device uses laser beams to scan a surrounding region to detect and identify objects. In one embodiment, the LiDAR control system is configured to refine a scanning region based on scanning results. The LiDAR control system may divide a scanning region into multiple sub-areas for differentiated scanning efforts. For example, the LiDAR control system may select a sub-area for enhanced scanning, e.g., with increased resolution. Methods for achieving scanning accuracy, increasing signal robustness, and reducing reflective noises are also disclosed.

The present technology relates to a light reception device and a distance measurement module whose characteristic can be improved. The light reception device includes an on-chip lens, a wiring layer, and a semiconductor layer arranged between the on-chip lens and the wiring layer. The semiconductor layer includes a first tap having a first voltage application portion and a first charge detection portion arranged around the first voltage application portion, and a second tap having a second voltage application portion and a second charge detection portion arranged around the second voltage application portion. Furthermore, the light reception device is configured such that a phase difference is detected using signals detected by the first tap and the second tap. The present technology can be applied, for example, to a light reception device that generates distance information, for example, by a ToF method, and so forth.

The disclosed computer-implemented method may include transmitting, by at least one radar device, to at least one transponder located within a physical environment surrounding a user, a frequency-modulated radar signal that has a first type of polarization, and receiving, by the at least one radar device, signals that have a second type of polarization, the second type of polarization being different than the first type of polarization, detecting, by a processing device communicatively coupled to the at least one radar device, a signal that has the second type of polarization and was returned to the at least one radar device from the at least one transponder in response to the frequency-modulated radar signal, and calculating, by the processing device, a distance between the at least one transponder and the at least one radar device. Various other methods, systems, and computer-readable media are also disclosed.

An optical activity detecting device is provided. The optical activity detecting device is adapted to detect an object. The optical activity detecting device includes a light source, a filter, a first polarizer, a second polarizer, a first compensation film and a first detector. The light source provides a light beam. The light beam travels from the light source, passes through the filter and the first polarizer, and enters the object. At least a portion of the light beam travels from the object, passes through the second polarizer and the first compensation film and is received by the first detector.

An optical activity detecting device is provided. The optical activity detecting device is adapted to detect an object. The optical activity detecting device includes a light source, a filter, a first polarizer, a second polarizer, a first compensation film and a first detector. The light source provides a light beam. The light beam travels from the light source, passes through the filter and the first polarizer, and enters the object. At least a portion of the light beam travels from the object, passes through the second polarizer and the first compensation film and is received by the first detector.

A computer, including a processor and a memory, the memory including instructions to be executed by the processor to receive an emitted polarized light beam at a lidar receiver that determines a polarization pattern and a distance to an object, wherein the polarization pattern is determined by comparing a linear polarization pattern and a circular polarization pattern and identify the object by processing the polarization pattern and the distance with a deep neural network, wherein the identity of the object can be metallic or non-metallic. The instructions can include further instructions to operate a vehicle based on the identified object.

An emitting device (26) for a scanning optical detection system of a vehicle for monitoring at least one monitoring region (14) for objects is described, having at least one light source (40a, 40b) for generating at least one optical emission signal (32a, 32b) and having at least one diffraction unit (50a, 50b), which has a diffractive effect on the at least one emission signal (32a, 32b), for controlling at least one beam direction (66a, 66b) of the at least one emission signal (32a, 32b). At least one diffraction unit (50a, 50b) which is settable to set the beam directions (66a, 66b) associated with the respective signal paths (41a, 41b), is arranged in at least two different signal paths (41a, 41b) of one emission signal or various emission signals (32a, 32b). At least one beam alignment unit (38) is arranged in the respective signal paths (41a, 41b) after the at least one diffraction unit (50a, 50b) to align the set beam directions (66a, 66b) in the at least one monitoring region (14) while maintaining at least one angle offset between the set beam directions (66a, 66b) generated before the at least one beam alignment unit (38) or to generate at least one angle offset between the set beam directions.