Patent ID: 9118906
Filing Date: 2015-08-25
Classification: G02B,G03B,H04N

Abstract:
1. A three-dimensional imaging device comprising: a first imaging unit including a first imaging optical system including a first focus lens, the first imaging unit including a first imaging sensor configured to perform photoelectric conversion on subject light imaged thereon through the first imaging optical system to output a first viewpoint image; a second imaging unit including a second imaging optical system including a second focus lens, the second imaging unit including a second imaging sensor configured to perform photoelectric conversion on subject light imaged thereon through the second imaging optical system to output a second viewpoint image; a storage configured to preliminarily store a focus position displacement amount which is a difference between a first lens position at which the first focus lens is positioned when a subject at a same distance is in focus and a second lens position at which the second focus lens is positioned when the subject at the same distance is in focus; and a focus adjustment unit which allows the first focus lens to perform search operation within a predetermined first search range upon focusing on a subject to be imaged, searches for a first lens position at which the subject to be imaged is focused on based on the first viewpoint image acquired from the first imaging unit, and moves the first focus lens to the searched first lens position, the focus adjustment unit which allows, as to the second imaging optical system, the second focus lens to perform search operation within a second search range which is narrower than the first search range and is in the vicinity of a lens position of the second focus lens corresponding to the searched first lens position, searches for a second lens position at which the subject to be imaged is focused on based on the second viewpoint image acquired from the second imaging unit, and moves the second focus lens to the searched second lens position, wherein when the first lens position at which the subject to be imaged is focused on is not found in case where search operation of the first focus lens is performed within the first search range, the focus adjustment unit allows the second focus lens to perform search operation within the first search range, searches for the second lens position at which the subject to be imaged is focused on based on the second viewpoint image acquired from the second imaging unit, moves the second focus lens to the searched second lens position, calculates the first lens position at which the subject to be imaged is focused on based on the searched second lens position and the focus position displacement amount stored in the storage, and moves the first focus lens to the first lens position.