Apparatus and method executed by apparatus
地域：
Tokyo
摘要
An apparatus comprising a sensor capable of generating a signal pair used in focus detection. The apparatus obtains, based on a defocus amount obtained using the signal pair, a focus distance of a lens unit that is mounted to the apparatus and adjusts a focus distance of the lens unit based on the obtained focus distance. When the lens unit is a multi-scopic lens unit having a plurality of optical systems having different axes, the apparatus obtains the focus distance using an adjustment value obtained based on an axis position that is a position on the sensor through which an axis of the multi-scopic lens unit passes.
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This application is a Continuation of U.S. application Ser. No. 17/835,844, filed Jun. 8, 2022, which claims priority from Japanese Patent Application No. 2021-098165, filed on Jun. 11, 2021, which is hereby incorporated by reference herein in its entirety.
The aspect of the embodiments relates to an apparatus and a method executed by the apparatus, and particularly relates to an apparatus capable of capturing an image using a lens unit having a plurality of optical axes and a method executed by such an apparatus.
A stereoscopic camera including a plurality of imaging optical systems and capable of shooting stereo images with a single image sensor is known (Japanese Patent Laid-Open No. 2011-205558). Meanwhile, in recent years, due to the drop in cost of VR goggles and other factors, there is demand for easier methods for shooting stereoscopic images.
For example, it is conceivable to capture stereoscopic images using a typical interchangeable lens-type image capture apparatus by incorporating two imaging optical systems into a single lens barrel as an interchangeable lens unit.
However, the image plane phase detection method of focus detection currently used mainly in mirrorless cameras assumes that the lens unit has a single optical axis. Therefore, when a lens unit having a plurality of optical axes, such as a lens unit in which two imaging optical systems are incorporated into a single lens barrel, is mounted, the accuracy of focus detection can drop.
權(quán)利要求
What is claimed is:1. An image capture apparatus comprising:one or more processors that execute a program stored in a memory and thereby function as: a detection unit configured to detect a first defocus amount and a second defocus amount, wherein the first defocus amount is detected based on a phase difference between a pair of light fluxes that pass through different exit pupils of a first optical system including a first focus lens, and wherein the second defocus amount is detected based on a phase difference between a pair of light fluxes that pass through different exit pupils of a second optical system including a second focus lens; and an adjustment unit configured to automatically adjust a drive amount of the first focus lens or the second focus lens based on a difference between the first defocus amount and the second defocus amount. 2. The image capture apparatus according to claim 1 , wherein the one or more processors further function as:a setting unit configured to set one of the first optical system and the second optical system as a reference imaging optical system and the other of the first optical system and the second optical system as non-reference optical system, wherein the adjustment unit: computes a difference of a defocus amount of the non-reference optical system from a defocus amount of the reference optical system; and determine, based on the computed difference, a driving amount of the non-reference optical system. 3. The image capture apparatus according to claim 2 , wherein the setting unit determines as the reference optical system, from among the first optical system and the second optical system, an optical system which cannot be independently driven, an optical system which has been set in advance by a use to be the reference optical system, an optical system having higher subject detection accuracy, or an optical system having higher focus detection accuracy. 4. The image capture apparatus according to claim 1 ,wherein the image capture apparatus has a first adjustment mode and a second adjustment mode for adjusting a difference between focus distances of the first optical system and the second optical system by moving the first optical system and/or the second optical system in an optical axis direction, wherein in the first adjustment mode, the difference is manually adjusted and in the second adjustment mode, the difference is automatically adjusted based on a difference between the first defocus amount and the second defocus amount, and wherein the adjustment unit performs the adjustment of the drive amount when the image capture apparatus is in the second adjustment mode. 5. The image capture apparatus according to claim 1 , further comprising:an operation member to be operated by a user; and a storage device that stores one or more correction values to correct any of the first defocus amount and the second defocus amount detected by the detection unit, wherein the one or more correction values are determined through operation of the operation member. 6. A method executed by an apparatus including a sensor capable of generating a signal pair used in focus detection, the method comprising:detecting a first defocus amount and a second defocus amount, wherein the first defocus amount is detected based on a phase difference between a pair of light fluxes that pass through different exit pupils of a first optical system including a first focus lens, and wherein the second defocus amount is detected based on a phase difference between a pair of light fluxes that pass through different exit pupils of a second optical system including a second focus lens; and automatically adjusting a drive amount of the first focus lens or the second focus lens based on a difference between the first defocus amount and the second defocus amount. 7. The method according to claim 6 , further comprising:setting one of the first optical system and the second optical system as a reference imaging optical system and the other of the first optical system and the second optical system as non-reference optical system; computing a difference of a defocus amount of the non-reference optical system from a defocus amount of the reference optical system; and determining, based on the computed difference, a driving amount of the non-reference optical system. 8. The method according to claim 7 , further comprising determining as the reference optical system, from among the first optical system and the second optical system, an optical system which cannot be independently driven, an optical system which has been set in advance by a use to be the reference optical system, an optical system having higher subject detection accuracy, or an optical system having higher focus detection accuracy. 9. The method according to claim 6 ,wherein the apparatus has a first adjustment mode and a second adjustment mode for adjusting a difference between focus distances of the first optical system and the second optical system by moving the first optical system and/or the second optical system in an optical axis direction, wherein in the first adjustment mode, the difference is manually adjusted and in the second adjustment mode, the difference is automatically adjusted based on a difference between the first defocus amount and the second defocus amount, and wherein the adjustment of the drive amount is performed when the apparatus is in the second adjustment mode. 10. The method according to claim 6 , further comprising:operating an operation member by a user; and storing one or more correction values to correct any of the first defocus amount and the second defocus amount detected by the detecting, wherein the one or more correction values are determined through operation of the operation member. 11. A non-transitory computer-readable medium storing a program executable by a computer included in an apparatus having a sensor capable of generating a signal pair used in focus detection, the program causes, when executed by the computer, to perform a method comprising:detecting a first defocus amount and a second defocus amount, wherein the first defocus amount is detected based on a phase difference between a pair of light fluxes that pass through different exit pupils of a first optical system including a first focus lens, and wherein the second defocus amount is detected based on a phase difference between a pair of light fluxes that pass through different exit pupils of a second optical system including a second focus lens; and automatically adjusting a drive amount of the first focus lens or the second focus lens based on a difference between the first defocus amount and the second defocus amount. 12. The non-transitory computer-readable medium according to claim 11 , further comprising:setting one of the first optical system and the second optical system as a reference imaging optical system and the other of the first optical system and the second optical system as non-reference optical system; computing a difference of a defocus amount of the non-reference optical system from a defocus amount of the reference optical system; and determining, based on the computed difference, a driving amount of the non-reference optical system. 13. The non-transitory computer-readable medium according to claim 12 , further comprising determining as the reference optical system, from among the first optical system and the second optical system, an optical system which cannot be independently driven, an optical system which has been set in advance by a use to be the reference optical system, an optical system having higher subject detection accuracy, or an optical system having higher focus detection accuracy. 14. The non-transitory computer-readable medium according to claim 11 ,wherein the apparatus has a first adjustment mode and a second adjustment mode for adjusting a difference between focus distances of the first optical system and the second optical system by moving the first optical system and/or the second optical system in an optical axis direction, wherein in the first adjustment mode, the difference is manually adjusted and in the second adjustment mode, the difference is automatically adjusted based on a difference between the first defocus amount and the second defocus amount, and wherein the adjustment of the drive amount is performed when the apparatus is in the second adjustment mode. 15. The non-transitory computer-readable medium according to claim 11 , further comprising:operating an operation member by a user; and storing one or more correction values to correct any of the first defocus amount and the second defocus amount detected by the detecting, wherein the one or more correction values are determined through operation of the operation member. 16. A multi-scopic lens unit comprising:a first optical system including a first focus lens; a second optical system including a second focus lens; and a driving circuit that moves the first optical system and/or the second optical system in an optical axis direction, wherein the multi-scopic lens unit is capable of adjusting a difference between focus distances of the first optical system and the second optical system, by moving the first optical system or the second optical system via the driving circuit based on a difference between a first defocus amount of the first optical system and a second defocus amount of the second optical system, and wherein the first defocus amount is detected based on a phase difference between a pair of light fluxes that pass through different exit pupils of the first optical system, and wherein the second defocus amount is detected based on a phase difference between a pair of light fluxes that pass through different exit pupils of the second optical system. 17. The multi-scopic lens unit according to claim 16 ,wherein the multi-scopic lens unit has a first adjustment mode and a second adjustment mode for adjusting a difference between focus distances of the first optical system and the second optical system by moving the first optical system and/or the second optical system in an optical axis direction via the driving circuit. 18. The multi-scopic lens unit according to claim 17 ,wherein in the first adjustment mode, the difference is manually adjusted and in the second adjustment mode, the difference is automatically adjusted based on the difference between the first defocus amount and the second defocus amount.
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