US 12,313,863 B2
Image sensor
Kosuke Watanabe, Kusatsu (JP); and Yasuhito Uetsuji, Kusatsu (JP)
Assigned to OMRON CORPORATION, Kyoto (JP)
Appl. No. 17/440,433
Filed by OMRON Corporation, Kyoto (JP)
PCT Filed Feb. 17, 2020, PCT No. PCT/JP2020/006077
§ 371(c)(1), (2) Date Sep. 17, 2021,
PCT Pub. No. WO2020/189134, PCT Pub. Date Sep. 24, 2020.
Claims priority of application No. 2019-053219 (JP), filed on Mar. 20, 2019.
Prior Publication US 2022/0155498 A1, May 19, 2022
Int. Cl. G02B 3/14 (2006.01); H04N 23/52 (2023.01)
CPC G02B 3/14 (2013.01) [H04N 23/52 (2023.01)] 6 Claims
OG exemplary drawing
 
1. An image sensor, comprising:
an optical system including a liquid lens;
an imaging device having an imaging surface on which an image of an object is to be formed by the optical system;
a nonvolatile memory configured to store property information about an amount of change in a refractive power of the liquid lens in response to an application voltage;
a temperature sensor configured to detect a temperature of the liquid lens; and
a body module,
wherein the optical system, the nonvolatile memory, and the temperature sensor are disconnectable from the body module, and
the body module includes a controller configured to perform image processing on image data received from the imaging device and to perform liquid lens control for determining the application voltage to be applied to the liquid lens based on the property information stored in the nonvolatile memory, the temperature of the liquid lens detected by the temperature sensor, and a target value for the refractive power of the liquid lens and applying the application voltage to the liquid lens,
a mutual relationship among the refractive power, the application voltage, and the temperature of the liquid lens is indicated by a relational expression including a plurality of parameters,
the plurality of parameters includes a first parameter and a second parameter, the second parameter having a smaller variation resulting from an individual difference in the liquid lens than the first parameter,
the first parameter is stored, as the property information, in the nonvolatile memory, and
the second parameter is preset for the controller.