An optical member driving device includes a motor, a driven portion, a fixed portion, and a moveable portion. The motor has a piezoelectric board configured by a plurality of piezoelectric elements and formed in an annular shape, and an annular metal board provided on a surface of the piezoelectric board and comprising a plurality of driving surfaces. The driven portion has a driven surface touching against the plurality of driving surfaces that rotates relative to the metal board around an axis passing through a center of the annular shape. The fixed portion is provided with one of the motor and the driven portion. The movable portion has a holding portion for holding an optical member, is provided with the other of the motor and the driven portion, and rotates relative to the fixed portion around the axis.

Disclosed is a distance vision-realizing eyeglasses for an image display device, including: a case which surrounds an eye area of a wearer and has a pair of holes formed in front thereof; a double convex lens assembly which includes a pair of lens housings respectively mounted in the pair of holes of the case and a pair of double convex lenses respectively provided in the pair of lens housings on a front straight line of both eyes of the wearer, the pair of the double convex lenses including an outer convex lens positioned on an outer side and fixed to the lens housing and an inner convex lens positioned inside the lens housing and mounted movably forward and backward; and a driving part which is installed between the pair of lens housings and moves a pair of inner convex lenses of the double convex lens assembly.

An embodiment comprises: a housing comprising a plurality of protrusions arranged on the upper surface thereof; a magnet arranged on a side portion of the housing; a bobbin having a first coil arranged on the outer peripheral surface thereof, the bobbin being configured to move by means of an interaction between the magnet and the first coil; an upper elastic member coupled to the bobbin and to the housing; and a sensing coil arranged on the side portion of the housing between the protrusions and the magnet, the sensing coil being configured to generate an induction voltage by means of an interaction with the first coil, wherein at least a part of the upper elastic member is arranged on the upper surface of the housing between the protrusions.

An embodiment comprises: a housing comprising a plurality of protrusions arranged on the upper surface thereof; a magnet arranged on a side portion of the housing; a bobbin having a first coil arranged on the outer peripheral surface thereof, the bobbin being configured to move by means of an interaction between the magnet and the first coil; an upper elastic member coupled to the bobbin and to the housing; and a sensing coil arranged on the side portion of the housing between the protrusions and the magnet, the sensing coil being configured to generate an induction voltage by means of an interaction with the first coil, wherein at least a part of the upper elastic member is arranged on the upper surface of the housing between the protrusions.

An actuator for adjusting an element to be moved in a beam path of an optical arrangement contains the element to be moved, a carrier and at least one SM element, the SM element being connected to the element to be moved and designed such that it is supported on the carrier, so that when the dimension of the SM element changes, a directed force effect is produced between the element to be moved and the carrier.

An embodiment comprises: a housing comprising a plurality of protrusions arranged on the upper surface thereof; a magnet arranged on a side portion of the housing; a bobbin having a first coil arranged on the outer peripheral surface thereof, the bobbin being configured to move by means of an interaction between the magnet and the first coil; an upper elastic member coupled to the bobbin and to the housing; and a sensing coil arranged on the side portion of the housing between the protrusions and the magnet, the sensing coil being configured to generate an induction voltage by means of an interaction with the first coil, wherein at least a part of the upper elastic member is arranged on the upper surface of the housing between the protrusions.

An embodiment comprises: a housing comprising a plurality of protrusions arranged on the upper surface thereof; a magnet arranged on a side portion of the housing; a bobbin having a first coil arranged on the outer peripheral surface thereof, the bobbin being configured to move by means of an interaction between the magnet and the first coil; an upper elastic member coupled to the bobbin and to the housing; and a sensing coil arranged on the side portion of the housing between the protrusions and the magnet, the sensing coil being configured to generate an induction voltage by means of an interaction with the first coil, wherein at least a part of the upper elastic member is arranged on the upper surface of the housing between the protrusions.

This invention provides an improved method and hardware/firmware to obtain photographs of any subject ranging from insects to landscapes. It allows either manual or fully automatic collection of images in small focal distance steps by externally rotating the focus ring for any camera and any lens. The acquired photos may then be processed using commercial software to obtain a final highly detailed, entirely in-focus image. The manual method employs a very fine adjustment screw interfaced with a tab extending out from the focus ring. The automated method employs a controller and stepper motor. It drives a lead screw configured to interface with a tab extending out from the focus ring or rotates solid gears, or a motor-pully gear interfaced with a gear band secured to the focus ring. The combination of electronic and mechanical advantages leads to the possibility of focus ring adjustments smaller than 0.001 degrees.

A control device includes a processor and a storage medium. The storage medium stores a program that, when executed by the processor, causes the processor to obtain a plurality of images shot at different lens positions of a focus lens of a photographing device, determine a target lens position of the focus lens that satisfies a preset condition based on blur amounts of the plurality of images, and control the focus lens to move close to the target lens position when a current lens position of the focus lens is within a preset range including the target lens position or control the focus lens based on an operation input when the current lens position is outside the preset range.

A knob structure includes a fixed member, a rotational assembly, and a damping element. The fixed member includes a carrying platform. The rotational assembly is rotatably disposed on the fixed member. The damping element is disposed between the carrying platform and the rotational assembly. A contact area between the carrying platform and the damping element is configured to be changed by a rotation of the rotational assembly.