Embodiments of the disclosure provide a micro shutter array, and an optical signal filtering method. The micro shutter array is used for filtering a series of optical signals at a plurality of time points. The optical signal at each time point includes a laser beam. The micro shutter array includes a plurality of micro shutter elements arranged in an array and a driver. The driver is configured to sequentially open a subset of the micro shutter elements at a specified location at each time point to allow a respective laser beam to pass through the micro shutter array at that time point.

A device for emission of polarized light and its detection including a light emitter configured to generate an outgoing light beam directed along an optical emission axis, a light receiver configured to detect an incoming light beam directed along an optical detection axis, and a polarization unit positioned in the optical emission axis and optical detection axis and configured to polarize the outgoing light beam and the incoming light beam. To allow a compact assembly, the device, by reducing the number of its constituent parts and by providing a good detection reliability of the device, the optical emission axis and the optical detection axis are angled with respect to one another such that they include an intersection point and the polarization unit includes a polarizer configured to deflect light from at least one of the incoming light beam towards the optical detection axis and the outgoing light beam away from the optical emission axis, the deflected light being defined by a polarization state produced by the polarizer.

A device for emission of polarized light and its detection including a light emitter configured to generate an outgoing light beam directed along an optical emission axis, a light receiver configured to detect an incoming light beam directed along an optical detection axis, and a polarization unit positioned in the optical emission axis and optical detection axis and configured to polarize the outgoing light beam and the incoming light beam. To allow a compact assembly, the device, by reducing the number of its constituent parts and by providing a good detection reliability of the device, the optical emission axis and the optical detection axis are angled with respect to one another such that they include an intersection point and the polarization unit includes a polarizer configured to deflect light from at least one of the incoming light beam towards the optical detection axis and the outgoing light beam away from the optical emission axis, the deflected light being defined by a polarization state produced by the polarizer.

The present invention relates to a low-cost LIDAR system. The system may be integrated in a wind turbine for measurement of the approaching wind field. One embodiment relates to a LIDAR system comprising a beam generating section adapted for generating a substantially linearly polarized output beam, and a beam steering section comprising a first optical device for controllably altering the polarization of the output beam, said first optical device in optical connection with a first polarizing beam splitter, said beam steering section adapted for directing the outputbeam interchangeably between a first direction and a second direction.

The present invention relates to a low-cost LIDAR system. The system may be integrated in a wind turbine for measurement of the approaching wind field. One embodiment relates to a LIDAR system comprising a beam generating section adapted for generating a substantially linearly polarized output beam, and a beam steering section comprising a first optical device for controllably altering the polarization of the output beam, said first optical device in optical connection with a first polarizing beam splitter, said beam steering section adapted for directing the outputbeam interchangeably between a first direction and a second direction.

A 3D imaging system includes an optical modulator for modulating a returned portion of a light pulse as a function of time. The returned light pulse portion is reflected or scattered from a scene for which a 3D image or video is desired. The 3D imaging system also includes an element array receiving the modulated light pulse portion and a sensor array of pixels, corresponding to the element array. The pixel array is positioned to receive light output from the element array. The element array may include an array of polarizing elements, each corresponding to one or more pixels. The polarization states of the polarizing elements can be configured so that time-of-flight information of the returned light pulse can be measured from signals produced by the pixel array, in response to the returned modulated portion of the light pulse.

A three-dimensional infrared laser aircraft landing-guiding system with high directivity is described. The system utilizes a highly penetrable and highly directional infrared laser source to generate an optical image via an optical image generating apparatus. The generated optical image involves the information for aircraft landing, and the information covers a large range of flying areas to make the optical image detectable for an aircraft. With the information provided by the optical image, the aircraft can be guided to the best landing path. The infrared laser source is highly directional and can emit a laser light to specific directions, reducing waste of energy, increasing navigation distances, and improving anti-jamming capability.

A three-dimensional infrared laser aircraft landing-guiding system with high directivity is described. The system utilizes a highly penetrable and highly directional infrared laser source to generate an optical image via an optical image generating apparatus. The generated optical image involves the information for aircraft landing, and the information covers a large range of flying areas to make the optical image detectable for an aircraft. With the information provided by the optical image, the aircraft can be guided to the best landing path. The infrared laser source is highly directional and can emit a laser light to specific directions, reducing waste of energy, increasing navigation distances, and improving anti-jamming capability.

Disclosed is a laser light transceiver which is configured so as to include a polarization changing unit 2 for outputting a laser light beam outputted from a transmission light source 1 toward a direction corresponding to the polarization of the laser light beam while changing the polarization of the laser light beam with respect to time. As a result, the laser light transceiver can transmit a laser light beam, whose power is not decreased, in two eye directions without mechanically scanning with the laser light beam.

Disclosed is a laser light transceiver which is configured so as to include a polarization changing unit 2 for outputting a laser light beam outputted from a transmission light source 1 toward a direction corresponding to the polarization of the laser light beam while changing the polarization of the laser light beam with respect to time. As a result, the laser light transceiver can transmit a laser light beam, whose power is not decreased, in two eye directions without mechanically scanning with the laser light beam.