Provided are a fixed-focus photographing module, a manufacturing method thereof, and a focusing device and method thereof. The focusing method includes: pre-assembling an optical lens assembly in a lens assembly holder, wherein the optical lens assembly is exposed at the exterior of the lens assembly holder, and the optical lens assembly is located in a photosensing path of a photosensing component assembled in a circuit board to form a pre-assembled photographing module; performing, by the pre-assembled photographing module, a photographing operation to obtain a testing image; adjusting, according to the testing image, a relative position between the optical lens assembly and lens assembly holder until the pre-assemble photographing module outputs a clear image as required; and fixing the optical lens assembly and the lens assembly holder to complete a focusing operation and obtain an assembled fixed-focus photographing module.

Provided are a fixed-focus photographing module, a manufacturing method thereof, and a focusing device and method thereof. The focusing method includes: pre-assembling an optical lens assembly in a lens assembly holder, wherein the optical lens assembly is exposed at the exterior of the lens assembly holder, and the optical lens assembly is located in a photosensing path of a photosensing component assembled in a circuit board to form a pre-assembled photographing module; performing, by the pre-assembled photographing module, a photographing operation to obtain a testing image; adjusting, according to the testing image, a relative position between the optical lens assembly and lens assembly holder until the pre-assemble photographing module outputs a clear image as required; and fixing the optical lens assembly and the lens assembly holder to complete a focusing operation and obtain an assembled fixed-focus photographing module.

A circuit for controlling liquid lens includes a liquid lens including a common electrode and a plurality of individual electrodes including first to fourth individual electrodes, a voltage generator configured to supply a voltage to the plurality of individual electrodes and the common electrode in the liquid lens, and a controller configured to control timing to sequentially supply the voltage to each of the individual electrodes, wherein the controller applies the voltage to the second individual electrode after applying the voltage to the first individual electrode, applies the voltage to the third individual electrode after applying the voltage to the second individual electrode, and applies the voltage to the fourth individual electrode after applying the voltage to the third individual electrode, and wherein the first to fourth individual electrodes are disposed at the same angular interval from each other with respect to a center of the liquid lens.

Methods and systems are provided autofocusing an imaging system. In one example, a method includes identifying a target focal plane of a field-of-view (FOV) of each objective of the imaging system, the imaging system including two or more objectives, adjusting a vertical position of each objective relative to the target focal plane based on a light shape generated from a laser beam, and aligning a focus of each objective according to a power level detected by a sensor.

Methods and systems are provided autofocusing an imaging system. In one example, a method includes identifying a target focal plane of a field-of-view (FOV) of each objective of the imaging system, the imaging system including two or more objectives, adjusting a vertical position of each objective relative to the target focal plane based on a light shape generated from a laser beam, and aligning a focus of each objective according to a power level detected by a sensor.

The imaging device includes a camera body and an interchangeable lens unit detachably attached to the camera body, the imaging device including, an optical system including a focus lens, an infinite rotation type focus ring, a lens drive part moving the focus lens forward and backward in an optical axis direction of the optical system, a setting part allowing a user to set a rotation range of the focus ring, a storage part assigning and storing respective different rotation amounts of the focus ring to multiple positions within a movement stroke of the focus lens in accordance with a rotation range set in the setting part, and a control part driving the lens drive part to move the focus lens depending on a rotation amount of the focus ring to a position corresponding to the rotation amount stored in the storage part.

According to an embodiment, a driving device housing with an axial direction is provided. The driving device housing is made of permeability magnetic material and polygonal in outer shape. The driving device housing includes an outer peripheral side wall and a housing top wall connected to a front side of the outer peripheral side wall. The housing top wall includes an opening allowing light to pass through. The housing further includes at least one step portion at each corner portion thereof. The step portion includes a step horizontal wall extending in a direction intersecting with the axial direction and a step vertical wall extending from the step horizontal wall toward a front side or a rear side. A magnet mounting portion is formed by an inner peripheral wall surface of the step vertical wall and an inner peripheral wall surface of the outer peripheral side wall adjacent thereto.

An imaging apparatus comprises an image pickup unit, a cutout image generation unit for cutting out a specified area in a pickup image taken by the image pickup unit to generate a cutout image enlarged at a specified magnification, an image display unit for displaying one or both of the pickup image taken by the image pickup unit and the cutout image generated by the cutout image generation unit, a display image control unit for controlling a method of displaying an image the image display unit displays, a manual focus operation unit for the user to control through manual operation the focus position of the image pickup unit, and a manual zoom operation unit for the user to control the zoom magnification of the image pickup unit.

An imaging apparatus comprises an image pickup unit, a cutout image generation unit for cutting out a specified area in a pickup image taken by the image pickup unit to generate a cutout image enlarged at a specified magnification, an image display unit for displaying one or both of the pickup image taken by the image pickup unit and the cutout image generated by the cutout image generation unit, a display image control unit for controlling a method of displaying an image the image display unit displays, a manual focus operation unit for the user to control through manual operation the focus position of the image pickup unit, and a manual zoom operation unit for the user to control the zoom magnification of the image pickup unit.

The zoom lens consists of, in order from an object side, a first lens group having a positive power, a second lens group having a negative power, a third lens group having a positive power, a fourth lens group having a negative power, and a fifth lens group having a positive power. An aperture diaphragm is disposed between a surface of the second lens group closest to an image side and a surface of the fourth lens group closest to the object side. The first lens group and the fifth lens group each consist of two or less lenses. A negative meniscus lens, which is convex toward the object side, is disposed to be closest to the object side of the second lens group. A negative meniscus lens, which is convex toward the image side, is disposed to be closest to the image side of the fourth lens group.