US 12,455,534 B2
Light detection and ranging
Abdullah Asmari, Milton Keynes (GB); and Timothy Smeeton, Milton Keynes (GB)
Assigned to Envisics Ltd, Milton Keynes (GB)
Appl. No. 18/005,458
Filed by Envisics Ltd, Milton Keynes (GB)
PCT Filed Jun. 7, 2021, PCT No. PCT/EP2021/065137
§ 371(c)(1), (2) Date Jan. 13, 2023,
PCT Pub. No. WO2022/028752, PCT Pub. Date Feb. 10, 2022.
Claims priority of application No. 2012155 (GB), filed on Aug. 5, 2020.
Prior Publication US 2023/0266712 A1, Aug. 24, 2023
Int. Cl. G03H 1/22 (2006.01); G01S 17/894 (2020.01); G03H 1/30 (2006.01)
CPC G03H 1/2294 (2013.01) [G01S 17/894 (2020.01); G03H 2001/306 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for performing light detection and ranging, the method comprising:
forming a first light pattern within a region of a scene by holographic projection, wherein the first light pattern comprises n light spots arranged in a regular array;
receiving a light return signal from each light detection element of an array of light detection elements directed at the region of the scene;
assessing an intensity of the light return signals, and when the light return signals do not meet at least one signal validation criterion based at least in part on the assessing of the intensity of the light return signals, (i) forming a second light pattern within the region of the scene by holographic projection, wherein the second light pattern comprises m light spots arranged in a regular array, wherein m≠n, and (ii) determining a time-of-flight in association with each light spot of the second light pattern.