A method is disclosed for ascertaining a focus image distance of an optical sensor, which is provided with a lens, of a coordinate-measuring apparatus onto a workpiece to be measured, wherein the optical sensor and/or the workpiece are movable in a Z direction such that a distance in the Z direction between the workpiece and the optical sensor is variable. Further, a corresponding coordinate-measuring apparatus and a computer program product are disclosed.

The optical driver apparatus is detachably attachable to an optical apparatus. The optical apparatus includes a lens operation member operable manually, and a locking mechanism switchable between a locking state of restraining motion of the lens operation member and an unlocking state of releasing the restraint. The optical driver apparatus includes a driver operation member, an actuator configured to move the lens operation member, and a controller configured to control the actuator. The controller is configured to drive the actuator in response to an operation of the driver operation member when the locking mechanism is in the unlocking state and to control the actuator, when the locking mechanism is in the locking state, so as to provide one of a state of not driving the actuator in response to the operation of the driver operation member and a state of performing a warning operation.

An imaging optical system includes: a front group having positive power; an aperture stop; a single lens Fn arranged adjacent to the aperture stop and having negative power; and a rear group having power. The front group includes: a first lens having positive power; a second lens having negative power; and a lens LG1R having positive power. The rear group includes a lens LGnR having negative power and located closest to the image. While focusing to make a transition from an infinity in-focus state to a close-object in-focus state, neither the front group nor the rear group moves but the single lens Fn moves along an optical axis toward the image. The imaging optical system satisfies the inequality: 0.38<fLG1R/fG1<1.75, where fG1 is a focal length of the front group and fLG1R is a focal length of the lens LG1R.

A control apparatus includes a first processing unit configured to calculate correlation information between image signals, which are respectively output from one of the pixel portions positioned in one of a plurality of first regions, a focus detection unit configured to perform focus detection on the basis of a calculation result by the first processing unit, a second processing unit configured to calculate correlation information between image signals, which are respectively output from the one of the pixel portions positioned in one of a plurality of second regions, a distribution information calculation unit configured to calculate distribution information corresponding to an object distance on the basis of a calculation result by the second processing unit, and a control unit configured to control the second processing unit and the distribution information calculation unit on the basis of the correlation information calculated by the first processing unit.

A MEMS auto focus miniature camera module includes an image sensor and an optical train including at least one movable lens and one or more fixed lenses or fixed lens groups on either side of the movable lens. The movable lens provides an auto focus feature of the camera module. A MEMS actuator translates the movable lens through an auto focus range to adjust focus.

An imaging apparatus includes an image sensor, a storage unit configured to store track data indicating a positional relationship between a zoom lens and a focus lens when an imaging optical system focuses at a predetermined subject distance, an adjustment value acquisition unit configured to acquire adjustment values for adjusting the track data, and a focus control unit configured to control a drive of the focus lens based on the track data and the adjustment values acquired by an adjustment value acquisition unit at a time of a zoom operation. The adjustment value acquisition unit selects adjustment value acquisition processing to be performed from a plurality of pieces of adjustment value acquisition processing, based on the track data, a position of the zoom lens, and a position of the focus lens, and acquires the adjustment values based on the selected adjustment value acquisition processing.

An optical element driving mechanism is provided and includes a fixed assembly, a movable assembly, a driving assembly, and a position-sensing assembly. The movable assembly corresponds to an optical element, and the movable assembly is movable relative to the fixed assembly. The driving assembly is configured to drive the movable assembly to move relative to the fixed assembly. The position-sensing assembly is configured to sense the movement of the movable assembly relative to the fixed assembly, and the position-sensing assembly includes a sensed unit and a sensing element. The sensing element corresponds to the sensed unit. The sensed unit has a plurality of reference magnetic elements arranged in a first direction, the sensed unit and the sensing element are arranged in an arrangement direction, and the first direction is not parallel to the arrangement direction.

Embodiments of the present disclosure relate to the technical field of digital projection and display, and in particular, relate to an automatic focusing projection method and system. The embodiments provide an automatic focusing projection method, which is applicable to an automatic focusing projection system. The automatic focusing projection system includes a ranging unit, a projection unit, and a reflection unit. The method includes: acquiring a depth image from the ranging unit, and acquiring a vertical projection distance from the ranging unit to a projection plane based on the depth image; acquiring position information of a center point of a projection picture in the depth image based on an elevation angle of the reflection unit and the vertical projection distance; acquiring a projection distance between the projection unit and the projection picture based on the position information; and performing focus adjustment on the projection unit based on the projection distance.

An image sensor and an image sensing method are provided. The image sensor may restore a high resolution image with respect to a high magnification based on sensing information corresponding to different fields of view (FOVs) and that is received through lens elements having a same focal length and different lens sizes.

An optical apparatus includes a setting unit configured for a user to set a requirement relating to driving of an optical element by an actuator, and a processor configured to generate reward information for generating a machine learning model for controlling the driving, based on a level of the requirement. The setting unit is configured for the user to input a change of the level of the requirement.