Light detection and ranging
AssigneeEnvisics Ltd
InventorsAbdullah Asmari, Timothy Smeeton
Life of this patent
Estimating the term…
Abstract
A method for light detection and ranging that includes forming a first light pattern within a region of a scene by holographic projection. The first light pattern includes 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 includes 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.
Claims20
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.
A light detection and ranging system comprising:
- a holographic projector configured to form light patterns within a region of a scene, wherein each light pattern comprises a plurality of light spots arranged in an array;
- a light detector array that comprises an array of light detection elements directed at the region of the scene;
- and
- a controller configured to:
- assess an intensity of light return signals received by the light detector array in response to formation of a first light pattern comprising a regular array of n light spots in the region of the scene, wherein when the light return signals do not meet at least one signal validation criterion based at least in part on the assessed intensity of the light return signals, the controller is further configured to (i) instruct the holographic projector to form a second light pattern within the region of the scene, wherein the second light pattern comprises a regular array of m light spots, wherein m≠n, and (ii) determine a time-of-flight in association with each light spot of the second light pattern.
Dependencies are inferred from the claim text.