US 12,253,742 B2
Focusing control device, lens device, imaging device, focusing control method, focusing control program
Koichi Tanaka, Saitama (JP)
Assigned to FUJIFILM Corporation, Tokyo (JP)
Filed by FUJIFILM Corporation, Tokyo (JP)
Filed on Jan. 13, 2022, as Appl. No. 17/574,556.
Application 17/574,556 is a continuation of application No. 16/151,358, filed on Oct. 4, 2018, granted, now 11,256,064.
Application 16/151,358 is a continuation of application No. PCT/JP2017/011240, filed on Mar. 21, 2017.
Claims priority of application No. 2016-077550 (JP), filed on Apr. 7, 2016.
Prior Publication US 2022/0137329 A1, May 5, 2022
Int. Cl. G02B 7/34 (2021.01); G02B 7/09 (2021.01); G02B 7/28 (2021.01); G03B 13/36 (2021.01); H04N 23/67 (2023.01); H04N 25/704 (2023.01)
CPC G02B 7/34 (2013.01) [G02B 7/09 (2013.01); G02B 7/28 (2013.01); H04N 23/672 (2023.01); H04N 25/704 (2023.01); G03B 13/36 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A focusing control device comprising:
a sensor that has a plurality of pairs of signal detection units, wherein each of the plurality of pairs include a first signal detection unit and a second signal detection unit, the first signal detection unit is configured to receive one of a pair of beams passed through different parts of an imaging optical system including a focus lens and detects a signal depending on an intensity of received light, the second signal detection unit is configured to receive other one of the pair of beams and detects a signal depending on an intensity of received light, and the different parts are disposed in one direction in a pupil region of the imaging optical system, wherein the sensor has a plurality of lines each comprising a portion of the plurality of pairs that are arranged in the one direction, and the plurality of lines are arranged in a direction orthogonal to the one direction;
a first correlation operation unit that performs a correlation operation between a first signal group obtained by adding up detection signals detected by a plurality of first signal detection units, of which positions in the one direction are same, included in the plurality of lines, and a second signal group obtained by adding up detection signals detected by a plurality of second signal detection units, of which positions in the one direction are same, included in the plurality of lines;
a second correlation operation unit that performs a correlation operation between a detection signal group detected by the first signal detection units included in the line and a detection signal group detected by the second signal detection units included in the line;
a selection unit that selects one of first result information and second result information based on the first result information of the correlation operation performed by the first correlation operation unit and the second result information of the correlation operation performed by the second correlation operation unit; and
a lens driving section that drives the focus lens based on the result information selected by the selection unit.