US 12,356,070 B2
Focus information obtaining apparatus, focus information obtaining method, and computer readable storage medium for obtaining information on a focus state based on an output of a detector
Taiki Homma, Tochigi (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Jan. 4, 2023, as Appl. No. 18/150,098.
Claims priority of application No. 2022-002113 (JP), filed on Jan. 11, 2022.
Prior Publication US 2023/0224580 A1, Jul. 13, 2023
Int. Cl. H04N 23/67 (2023.01); G03B 13/36 (2021.01); G06T 7/20 (2017.01); G06V 10/60 (2022.01)
CPC H04N 23/672 (2023.01) [G03B 13/36 (2013.01); G06T 7/20 (2013.01); G06V 10/60 (2022.01)] 15 Claims
OG exemplary drawing
 
1. A focus information obtaining apparatus comprising:
at least one processor;
a memory coupled to the at least one processor storing instructions
that, when executed by the at least one processor, cause the at least one processor to function as:
a detector configured to detect at least a part of a light beam from an object via an optical member including a lens unit;
a controller configured to determine a charge accumulation time of the detector; and
an obtaining unit configured to obtain information on a focus state based on an output of the detector,
wherein the controller is configured to control the detector based on an output of the detector and a driving speed of the lens unit, and
wherein the charge accumulation time of the detector is set to be long when the driving speed of the lens unit is low, and the charge accumulation time of the detector is set to be short when the driving speed of the lens unit is high.