Example radar systems, optical detectors, vehicles, and optical detection methods are provided. An example radar system includes a laser device and an optical detector. The optical detector can include a first polarization scanner and a photosensitive device. The laser device can be configured to emit detection laser. The first polarization scanner can be configured to refract an echo signal of the detection laser, where a refractive index of the first polarization scanner is variable. The photosensitive device can be configured to sense the echo signal refracted by the first polarization scanner.

A sensor system can include a housing and a lens carrier at least partially disposed within the housing. The lens carrier defines a cylindrical structure including a number of housings disposed at a midpoint of the lens carrier, the housings configured to hold a number of sensor assemblies therein. The sensor assemblies include a first sensor assembly positioned proximate a second sensor assembly, each including a sensor lens and a sensor. The first sensor assembly is configured to emit a signal and the second sensor assembly is configured to receive the emitted signal. Positioned between the first sensor assembly and the second sensor assembly, and at least partially disposed around each assembly, is a gasket. The gasket extends from a base of the first sensor and the second sensor to second face of the lens carrier, and is configured to block an emitted signal from the first sensor assembly.

A night vision device with distance measurement function is configured to obtain a distance between a target object and the night vision device with distance measurement function by inputting a size of the target object and by using a focal length of an objective lens unit, a pixel information of an image sensing module, and a resolution of a display unit. In this way, a simple, fast and inexpensive distance measurement can be achieved without the conventional laser rangefinder

A pulsed light emitting element emits pulsed light that is linearly polarized in a first polarization direction, the pulsed light passes through a polarizing beam splitter and a lens in this order and is radiated onto a target object, reflected light passes through the lens and the polarizing beam splitter in this order, is linearly polarized in a second polarization direction that is different from the first polarization direction, and is concentrated on a light receiving element, the pulsed light emitting element and the light receiving element are provided on a focal plane of the lens, and the optical axis of the pulsed light and the optical axis of the reflected light overlap.

A silicon phased array based LiDAR device that measures a distance using a quasi-frequency modulation is disclosed. A LiDAR device according to an exemplary embodiment of the inventive concept includes a light source that generates an optical signal, an optical modulator that generates a first optical signal having a quasi-frequency whose a modulation frequency constantly varies with time by modulating a light intensity of the optical signal, an optical splitter that splits optical power of the first optical signal into a reference optical signal and a transmit (Tx) optical signal, an optical transmitter that receives and emits the Tx optical signal toward an object, an optical receiver that receives a receive (Rx) optical signal reflected from the object and transfers the Rx optical signal, an optical coupler that mixes the reference optical signal and the Rx optical signal, a balanced photodetector that detects an intermediate frequency from the optical signal transferred from the optical coupler and a distance calculator that obtains distance information by measuring the intermediate frequency.

A LADAR device, including: a rangefinder; a signal transmission module; a power transmission module; a mechanical rotating part; a housing; a signal processing board; and a timing module. The signal transmission module includes at least one optical communication transmitter and one optical communication receiver. The power transmission module includes coupled magnet rings and communicates with the signal transmission module through electromagnetic induction to achieve wireless power transmission. The mechanical rotating part is adapted to drive the rangefinder to rotate axially in 360 degrees. The rangefinder is disposed on the housing, and includes a laser, an emitting lens assembly, a receiving sensor, and a receiving lens. The emitting lens assembly includes a first accommodation space and the laser is disposed in the first accommodation space. The receiving lens includes a second accommodation space and the receiving sensor is disposed in the second accommodation space.

A distance detector comprising: a laser transmitter and receiver for generating a laser beam to irradiate an object and to receive return light reflected in response from the object, an image detection system for generating an image of a view, the image detection system including an objective lens for collecting light from the view, an image sensor for receiving light collected by the objective lens and for generating the image therefrom, and a digital display for displaying the image such that the digital display displays a real-time image of the view, a laser beam indicium on the digital display or a laser beam indicium generator configured to display laser beam indicium on the digital display, wherein the laser beam indicium indicates a direction of the laser beam, and a range-finding system for determining the distance to an object irradiated by the laser beam using return light and for displaying distance.

A distance measurement sensor that detects a distance to an object based on heterodyne detection using light generated from a light source and another light received by a light receiver, includes: a scanning unit which scans the light in a first direction; a diffusing lens which diffuses the light in a second direction; multiplexers which multiplex the light and the another light to provide optical signals, respectively; and a processor which detects the distance to the object based on the optical signals. The light receiver has light receiving antennas in the second direction. The multiplexers are connected to the light receiving antennas, respectively. The processor performs a parallel processing for detecting the distance to the object based on the optical signals with respect to the light receiving antennas individually.

An optoelectronic sensor for detecting objects in a monitored zone is provided, wherein the sensor has a scanning unit that is movable about an axis of rotation and that has a plurality of scanning modules accommodated therein for a periodic scanning of the monitored zone and for a generation of corresponding received signals and that has a control and evaluation unit for acquiring information on the objects from the received signals; and wherein the scanning modules each comprise a light transmitter for transmitting a light beam and a light receiver for generating a respective received signal from the light beam remitted by the objects. A respective mirror element is here associated with the scanning modules to set an angle of elevation of a respective scanning plane detected by a scanning module with respect to a central scanning plane perpendicular to the axis of rotation.

A detection system for a vehicle in an environment includes at least one reflective member having a rotational axis and a plurality of reflective sides. Each of the reflective sides slopes towards the rotational axis at a slope angle different than the slope angle of at least one of the others of the reflective sides. The system includes a plurality of LiDAR systems with at least one light transmitter and at least one light receiver, each LiDAR system interacting with a different one of the reflective sides to scan the environment.