公开(公告)号：US20230266711A1

公开(公告)日：2023-08-24

申请号：US18005457

申请日：2021-06-21

申请人： Envisics Ltd

发明人： Timothy Smeeton ,  Abdullah Asmari ,  Gavin Fowler

IPC分类号： G03H1/22 ,  G03H1/08

CPC分类号： G03H1/2294 ,  G03H1/0808 ,  G03H2001/2297

摘要： A LIDAR system for scene surveying comprises a spatial light modulator for displaying a diffractive pattern comprising a hologram of a light footprint, and a light source for illuminating the diffractive pattern to form a holographic reconstruction of the light footprint on a holographic replay plane in the scene. The light footprint comprises an array of light features. The system comprises a display driver for controlling the spatial light modulator and changing the diffractive pattern with time. The diffractive pattern is changed with time such that each light feature of the array of light features scans a respective sub-area of the scene. The system comprises a detection system having a plurality of light detecting elements and that is configured such that each light detecting element detects light from a respective individual field of view within the scene. Each sub-area of the scene contains a plurality of individual fields of view.

公开(公告)号：US20230266712A1

公开(公告)日：2023-08-24

申请号：US18005458

申请日：2021-06-07

申请人： Envisics Ltd

发明人： Abdullah Asmari ,  Timothy Smeeton

IPC分类号： G03H1/22 ,  G01S17/894

CPC分类号： G03H1/2294 ,  G01S17/894 ,  G03H2001/306

摘要： A method for light detection and ranging comprises a forming a first light pattern within a region of a scene by holographic projection. The first light pattern comprises n light spots arranged in a regular array. A light return signal is received from each light detection element of an array of light detection elements directed at the region of the scene. The intensity of the light return signals is assessed. If the light return signals do not meet at least one signal validation criterion, a second light pattern is formed within the region of the scene by holographic projection. The second light pattern comprises m light spots arranged in a regular array, wherein m ≠ n. A time-of-flight in association with each light spot of the second light pattern is then determined.