Abstract: A driving device for an optical device comprising: an operation ring 3 to which a driving force from an operation member 4 is transmitted; a driving ring 9 to which a driving force from an actuator 20 is transmitted; an output ring 5 which transmits a driving force to an optical component 8a; and a planetary roller 6 which slides on one end face 3b of said operation ring 3 and one end face 9b of said driving ring 9, said planetary roller 6 being rotatably attached to said output ring 5 so as to selectively transmit the driving force from any one of said operation ring 3 and said driving ring 9 to said output ring 5. A sliding face 3b of said operation ring 3 with said planetary roller 6 consists of a lower friction member than the operation ring body.

Abstract: A first tilt unit that is to abut a first tilt receiving unit of a rotating member is provided at a peripheral portion of a first lens frame. A second lens frame moves in a direction parallel to the optical axis, integrally with an adjustable diaphragm by a protrusion passing through a coil-shaped optical-axis biased spring and a hole provided in a base member. On a side surface of a linear-guidance ring, a guide groove is formed to engage with a lug of the second lens frame and slide the second lens frame in a direction parallel to the optical axis in the linear-guidance ring. Further, on an inner surface of the linear-guidance ring, a second tilt unit that is to abut a second tilt receiving unit of the rotating member is provided.

Abstract: An assembling structure for a magnifying glass comprises a magnifying lens element and an annular lens frame. The annular lens frame is formed with a through assembling hole and provided with a guiding portion and a stopping portion. In an inner surface of the annular lens frame is formed an engaging groove. The guiding portion and the stopping portion are located at two opposite sides of the engaging groove. The annular lens frame is made of polypropylene. After being heated, the polypropylene-made annular lens frame can be softened slightly and enhanced in terms of elasticity, so that the magnifying lens element can be placed from the guiding portion and engaged into the engaging portion. By such an arrangement, the installation of the magnifying lens element in the annular lens frame is simple, quick, labor-saving and stable.

Abstract: The invention provides, in some aspects, devices for image acquisition that use seals (e.g., O-rings) between concentrically disposed portions of an enclosure and an optics assembly (or sub-assemblies thereof) in order to protect image acquisition components from the surrounding environment (and vice versa) while, at the same time, providing adequate friction for both adjusting and locking focus. Such devices include, in one aspect of the invention, an image capture medium (e.g., a CMOS sensor, CCD array, etc.) that is disposed within an enclosure and an optics assembly that is also disposed within that enclosure, rotatably. The optics assembly, which includes at least a lens, can have a cylindrical outer diameter along at least a portion of its length that is received within the enclosure along a length that has a corresponding cylindrical inner diameter. A first seal (e.g., an “O-ring”) is disposed between, and in contact with, the optics assembly and the enclosure, e.g., along these corresponding lengths.

Abstract: A lens driver having a manually operated ring, rotation detection means for detecting rotation direction and rotating speed of the manually operated ring on the basis of rotation the manually operated ring, a switching means for switching a control mode, on the basis of detection result of the rotation detection means, between a normal control mode in which a lens is driven at normal driving speed depending on rotating speed of the manually operated ring and a high-speed control mode in which the lens is driven at high driving speed which is faster than the normal driving speed, and a driving control means for controlling a driving means so that the lens is driven at the normal driving speed when the normal control mode is set and controlling the driving means so that the lens is driven at the high driving speed when the high-speed control mode is set.

Abstract: A lens barrel and a photographing apparatus including the lens barrel include a clutch assembly disposed on a plane orthogonal to an optical axis between a manual adjustment ring and a distance adjustment ring.

Abstract: A camera module includes a barrel, a holder, a focus ring and an elastic element. The barrel includes a bottom surface opposing the holder. The holder includes an end surface facing the bottom surface of the barrel. At least one of the bottom surface and the end surface defines a first curved cutout and a second curved cutout. The depth of the first curved cutout is different from that of the second curved cutout. The focus ring is positioned between the bottom surface and the end surface. The focus ring includes a bump. An end of the elastic element is fixed to the barrel and the other end is fixed to the holder. The elastic element pulls the barrel to position the focus ring between the barrel and the holder. When rotating the focus ring, the bump can be received in the first curved cutout or the second curved cutout.

Abstract: A lens module includes a holder, a barrel, a lens, and a focus ring. The barrel is accommodated in the holder and threadedly coupled to the holder. The lens is received in the barrel. The focus ring surrounds and is securely fixed with the barrel. The focus ring is sandwiched between the holder and the barrel. The focus ring has at least two protrusions formed on an outer surface thereof. The at least two protrusions are symmetrical about a center of the focus ring.

Abstract: It is intended to carry out a focusing operation suitably in each case of automatic focusing and manual focus adjustment. Therefore, in the present invention, there is provided a first focus ring 1 movable between a first position and a second position on an optical axis. Further, a first rotation-angle detection unit detecting a rotation amount of the first focus ring 1 at the first position, a second focus ring 2 coupled to the first focus ring 1 when the first focus ring 1 is at the first position, and a second rotation-angle detection unit detecting a rotation amount of the second focus ring 2 are provided. When the first focus ring 1 is at the first position, a focus lens is driven based on the rotation amount detected by the first rotation-angle detection unit, and when the first focus ring 1 is at the second position, the focus lens is driven based on the rotation amount detected by the second rotation-angle detection unit.

Abstract: A lens module includes a holder, a barrel, a lens, and a focus ring. The barrel is accommodated in the holder and threadedly coupled to the holder. The lens is received in the barrel. The focus ring surrounds and is securely fixed with the barrel. The focus ring is sandwiched between the holder and the barrel. The focus ring has at least two protrusions formed on an outer surface thereof. The at least two protrusions are symmetrical about a center of the focus ring.

Abstract: According to the lens apparatus of the present invention, the detection unit which detects the position of the first focus ring is disposed in the case of the lens drive unit, which thus enables the downsizing of the lens barrel. Further, the interlock member is disposed in the case of the drive unit, and hence it is possible to accurately detect the position of the first focus ring without an influence of disturbance caused by a drop of water, dirt, and the like, and to perform accurate focus control.

Abstract: A focusing device is provided. The focusing device has a changing focal length along a physical parameter thereof. The focusing device could be annular or in a shape of a disk. The annular focusing device has a width thereof changing with a periphery thereof, and the disk-shaped focusing device has a thickness, wherein the thickness of the disk-shaped focusing device is changing with an angular position thereof.

Abstract: A lens barrel having an increased strength against external impact. The lens barrel is configured to move in an optical axis direction. A photographic lens unit moves in the optical axis direction. A cylindrical unit is engaged with the photographic lens unit, and has an outer periphery formed thereon with a first cam groove followed by the photographic lens unit. The cylindrical unit performs rotation to thereby move the photographic lens unit in the optical axis direction. A rectilinear motion-causing restriction member is engaged with the cylindrical unit to restrict motion of the photographic lens unit to rectilinear motion. A second cylindrical unit is disposed around the photographic lens unit and the cylindrical unit to guide the photographic lens unit for rectilinear motion. A second rectilinear motion-causing restriction member restricts motion of the rectilinear motion-causing restriction member and the second cylindrical unit in a direction of rotation.

Abstract: A barrier unit which can be easily assembled to a lens holding member in view of the above problems. The direction in which a barrier unit is rotated when the barrier unit is assembled with a lens holding member coincides with the direction in which a barrier blade driving member is rotated when the barrier blade is closed from the open state.

Abstract: A monitoring lens device includes a focus ring that is provided in an outer circumferential portion of a fixed cylinder and a zoom ring that is provided in an outer circumferential portion of the focus ring. A screw hole that is engaged with a shaft portion of a lock knob is formed in the focus ring, and an opening portion (long groove) through which the lock knob passes is formed in the zoom ring. A spacer is attached to the lock knob and a convex portion of the spacer is fitted into the opening portion.

Abstract: Disclosed is a lens device including a click mechanism of a ring member that is rotated with respect to a lens barrel body, slides in the optical axis direction, has high slidability during a click operation and high durability, and can prevent one-sided abrasion due to the inclination of the ring member. A click mechanism of a first focus ring includes: elastic members for clicking provided at three equally divided positions on the circumference of a front fixed ring of a lens barrel body; and a contact portion that is formed in a central portion of the inner circumferential surface of the first focus ring and comes into contact with a convex portion of the elastic member for clicking. The elastic member for clicking is made of polyacetal with high slidability. Therefore, it is possible to reduce the abrasion of the elastic member for clicking during a click operation.

Abstract: One embodiment of a manual focus driving ring comprised of two base rings (10 and 11), each having a through-hole near their edge (20 and 21), roll pins (17) conjoining the base rings, a pressure mount ring (16) adhered to the inner surface of the base rings, or a threaded mount ring (24), either of which frictionally secures the manual focus driving ring to the camcorder body (25). A sliding ring (12) is sandwiched between the base rings and slides along their outer surface of the base rings. An extension rod (13) with a gear (14) or friction-driven o-ring (23) is inserted into the through-hole in the base rings, and is rotationally driven by the sliding ring's inner surface, and a flanged tube (15) on the outer tip of the extension rod that acts as a focus driver and rotates in conjunction with the rotation of the sliding ring.

Abstract: Distance information is displayed at the time of manual focusing but is not displayed at the time of automatic focusing. By rotating a focus switching ring around an optical axis for automatic focusing, an intermediate ring coupled thereto by a cam and a distance display ring rotatably coupled to the intermediate ring are moved along the optical axis to an image side. At this time, the distance display ring and the manual focus ring are uncoupled from each other. With this switching, the distance information written on the distance display ring is also moved to the image side. Therefore, the distance information, which is visible through an information display window of the focus switching ring at the time of manual focusing, becomes invisible.

Abstract: A lens barrel includes a drive ring having a hollow cylindrical shape and configured to rotate around an optical axis, and a lens holder configured to move in an optical axis direction relative to the drive ring, the lens holder including a body located inside of the drive ring and configured to hold a lens, and an arm extending to outside of the drive ring. The drive ring has a notch, and the arm of the lens holder is configured to enter the notch of the drive ring.

Abstract: A linear guide mechanism of a lens barrel, the lens barrel including a rotatable ring, and a linearly movable member which holds an optical element and moves linearly in an optical axis direction by rotation of the rotatable ring, the linear guide mechanism includes a plurality of partial linear guide members which linearly guide the linearly movable member in the optical axis direction. A movement range of the linearly movable member in the optical axis direction is shared by a plurality of different movement ranges, via which the linearly movable member is linearly guided in the optical axis direction by the plurality of partial linear guide members, respectively.

Abstract: A lens position sensor for infrared or other types of cameras, which is particularly useful in lens assemblies that have relatively limited axial travel between near field and far field lens focus positions. The camera includes a magnet or other stimulator coupled to a rotatable lens that extends within a magnet plane where the magnet plane is not normal to the optical axis of the lens. A magnetic or other sensor senses the position of the magnet, which is indicative of the lens position.

Abstract: A monitoring lens device includes a focus ring that is provided in an outer circumferential portion of a fixed cylinder and a zoom ring that is provided in an outer circumferential portion of the focus ring. A screw hole that is engaged with a shaft portion of a lock knob is formed in the focus ring, and an opening portion (long groove) through which the lock knob passes is formed in the zoom ring. A spacer is attached to the lock knob and a convex portion of the spacer is fitted into the opening portion.

Abstract: An O-ring 12 is disposed on an image-side second outer peripheral surface 11—1b, which is subjected to a smoothing process, of a taking lens 11—1. The O-ring 12 is pressed by an inner surface 13a of a lens frame 13 toward the second outer peripheral surface 11—1b.

Abstract: A water-resistant structure of a lens barrel includes a sealing member that seals an annular gap between inner and outer annular members, wherein the sealing member is positioned in a vicinity of an open end of the outer annular member and is fixed to one of the inner and outer annular members to be slidable on the other of the inner and outer annular members, and a drain groove formed on the inner annular member and positioned alongside the sealing member at a position closer to the open end of the outer annular member than the sealing member. Furthermore, a frictional resistance of a first sealing member produced between a secondary annular member and a manually-rotatable annular members is greater than a frictional resistance of the second sealing member that urges one of two of the manually-rotatable annular members to follow a rotation of the other thereof when rotated.

Abstract: It is an object of the present invention to provide a lens barrel in which operability for a user is increased and a reduction in parts is achieved while provided with a manual operating member.

Abstract: A lens position detector for detecting a position of a movable lens group in an optical axis direction includes a manual operating ring, a rotation of the manual operating ring causing the movable lens group to move in the optical axis direction; a code plate installed in a barrel; and a conductive brush fixed to the manual operating ring, the rotation of the manual operating ring causing relative rotational sliding between the conductive brush and the code plate. A surface of the code plate with which the conductive brush is in sliding contact is inclined to a plane orthogonal to the optical axis at an angle of inclination substantially equal to a lead angle of male and female screw threads engaged with each other which are formed on the manual operating ring and the ring member, respectively.

Abstract: A variable power lens, having first and second lens groups, includes first and second lens group support frames, a linear guide ring, first and second lens group drive rings which rotate to move the first and second lens group support rings in the optical axis direction relative to the linear guide ring, a drive ring coupler which couples the first and second lens group drive rings with each other to prevent relative rotation therebetween while allowing relative movement therebetween in the optical axis direction; and a drive-ring movement controller which integrally rotates the first and second lens group drive rings via the drive ring coupler without relatively moving in the optical axis direction when a power-variation operating member is operated, and moves one of the first and the second lens group drive rings in the optical axis direction without rotating when a focus operating member is operated.

Abstract: A projector has a case, a zoom lens, a zoom ring, a control plate, a lodging element, a control rod, and a handle. The case has an opening, and the zoom ring is disposed within the case and nearby the opening, the zoom ring is moved back and forth to drive the zoom rod. The control plate is mounted on the case and laid over the opening movably, the lodging element is movably contacted with the control rod, wherein the handle accepts the force along the extending direction of the rectangular opening so as to let the control plate move the lodging element along the extending direction of the rectangular opening and further to move the control rod for continuously regulating the focal length of the zoom lens.

Abstract: Areas 11—1a, being in contact with an O-ring 13, of an outer peripheral surface of a taking lens 11—1 and an area 12a, being in contact with the O-ring 13, of an inner surface of a lens frame 12 are formed in taper shapes having slopes with respect to an optical axis of the taking lens 11—1 in a section taken along a plane including the optical axis. The O-ring 13 is disposed in contact with the areas 11—1a and 12a, which are formed in the taper shapes, of both of the outer peripheral surface of the taking lens 11—1 and the inner surface of the lens frame 12. Also, the O-ring 13 is pressed in directions of arrows P and P? by the outer peripheral surface of the taking lens 11—1 and the inner surface of the lens frame 12.

Abstract: An exemplary lens module (30) includes a lens barrel (31), a focusing mechanism (40), a resilient member (70), and a bottom seat (50). The lens barrel is mounted with at least one lens (36) therein and is fixed to one end of the focusing mechanism. One end of the resilient member resists the focusing mechanism and the other opposite end of the resilient member resists the bottom seat. The focusing mechanism is for controlling an amount of expansion permitted within the resilient member. The amount of expansion of the resilient member determines a degree of focus achieved by the lens module.

Abstract: An ocular focus device. An ocular lens tube is movably disposed in an ocular housing and includes a positioning groove. An ocular lens set is disposed in the ocular lens tube. A positioning member is connected to the ocular housing and is disposed in the positioning groove. When the ocular lens tube moves with respect to the ocular housing, the ocular lens set performs a focus operation, and the positioning member moves in the positioning groove, limiting a moving range of the ocular lens tube with respect to the ocular housing.

Abstract: An exemplary lens module (20) includes a lens barrel (5), a focusing mechanism (7), a resilient member (9), and a bottom seat (6). The lens barrel is mounted with a lens (517) therein. The lens barrel is axially movable relative to the bottom seat due to a rotation of the focusing mechanism and the force generated by the resilient member. Such an axial movement, in turn, would change a position of the lens relative to the bottom seat.

Abstract: It is intended to carry out a focusing operation suitably in each case of automatic focusing and manual focus adjustment. Therefore, in the present invention, there is provided a first focus ring 1 movable between a first position and a second position on an optical axis. Further, a first rotation-angle detection unit detecting a rotation amount of the first focus ring 1 at the first position, a second focus ring 2 coupled to the first focus ring 1 when the first focus ring 1 is at the first position, and a second rotation-angle detection unit detecting a rotation amount of the second focus ring 2 are provided. When the first focus ring 1 is at the first position, a focus lens is driven based on the rotation amount detected by the first rotation-angle detection unit, and when the first focus ring 1 is at the second position, the focus lens is driven based on the rotation amount detected by the second rotation-angle detection unit.

Abstract: There is disclosed an adapter ring for rotation of a photographing lens barrel, the adapter ring being fitted into an outer periphery of the photographing lens barrel, the adapter ring being rotated through engaging with a ratchet wheel having a plurality of pawls which ratchet wheel rotates in conjunction with a dial disposed in a waterproof protector. This adapter ring has: a plurality of first projecting portions arranged in a predetermined angle range around an optical axis in the outer periphery to engage with the pawls of the ratchet wheel; and a plurality of second projecting portions which are the same plurality of projecting portions as the plurality of first projecting portions, the second projecting portions being arranged in a predetermined angle range but out of the predetermined angle range of the plurality of the first projecting portions.

Abstract: A telescopic sight includes a zoom mechanism with which an angle of adjustment of sighting can be enlarged, such that sighting precision of the telescopic sight can be stably maintained, and with which zooming can be performed with a light touch. The telescopic sight includes a zoom ring, an annular gear, a circumferential gear, an intermediate gear and a transmission mechanism. The zoom ring is turnably provided at an outer periphery of a lens barrel of a telescopic sight. The annular gear is provided at an inner periphery face of the zoom ring. The circumferential gear is rotatably provided, concentrically with the annular gear, at an inner periphery of the lens barrel. The intermediate gear is interposed between the annular gear and the circumferential gear and transmit rotation of the annular gear to the circumferential gear.

Abstract: A lens barrel includes a support ring movable in an optical axis direction; a displaceable optical element supported by the support ring movable between a photographing position and a radially-displaced position in which the displaceable optical element is eccentrically displaced from the optical axis; and an advancing/retracting optical element supported by the support ring. When the lens barrel is in a ready-to-photograph state, the displaceable optical element is held at the photographing position, and the displaceable optical element and the advancing/retracting optical element are aligned in the optical axis direction. When the lens barrel moves from the ready-to-photograph state to an accommodated state, the displaceable optical element is held at the radially-displaced position, and the displaceable optical element and the advancing/retracting optical element are relatively moved so as to at least partially coincide with each other in a direction orthogonal to the optical axis.

Abstract: A focus regulator is provided for simplifying and minimizing the structure of an image projector. The focus regulator includes a controller rotatably formed on a main body to be limitedly movable in the direction of the optical axis. A focus lens unit is affixed to the projection lens unit of the main body to be movable in the direction of the optical axis (OX) by being rotated with the controller.

Abstract: A focusing device is provided. The focusing device has a changing focal length along a physical parameter thereof. The focusing device could be annular or in a shape of a disk. The annular focusing device has a width thereof changing with a periphery thereof, and the disk-shaped focusing device has a thickness, wherein the thickness of the disk-shaped focusing device is changing with an angular position thereof.

Abstract: A mobile device having a digital camera and an assembling method for a ring is disclosed. The mobile device includes a housing, a digital camera module and the ring, wherein the housing has a through hole which a notch is formed therein. The digital camera module has an arm. The ring is disposed in the through hole. Besides, one side of the ring includes an extended part which is located on the notch and forms a dynamic relationship with the arm.

Abstract: A lens barrel includes a focus cam ring that holds a focus lens group and moves in the optical axis direction of the focus lens group while rotating along a cam groove in response to a focusing operation, and a fixed tube having a fitting raised portion that can pivot the focus cam ring in the rotational direction thereof and movably supports the focus cam ring in the optical axis direction. The focus cam ring has a position restrictor that can engage the fitting raised portion, and the position restrictor includes a rotational-direction restrictor that restricts the position of the focus cam ring in the rotational direction and an optical axis-direction restrictor that restricts the position of the focus cam ring in the optical axis direction.

Abstract: A lens module includes a base; a focusing ring rotatably mounted to the base and having at least one driving portion formed on a torus thereof, the driving portion having at least two positioning portions and at least one inclined portion in connection with the two positioning portions, the two positioning portions being located at different radial positions of the ring body; and a combination holder being fitted onto the focusing ring to be rotatable on an internal sidewall the focusing ring, the combination holder having at least one convex portion contacting against one of the at least two positioning portions, the combination holder being combined with a lens barrel that a lens set is received. Accordingly, while the focusing ring is rotated, the combination holder is axially moved to change the axial distance between the combination holder and the base, finally attaining the focusing effect.

Abstract: A projection lens including a front sleeve, a rear sleeve, a main sleeve, a driving ring, sliding components and lenses is provided. The main sleeve covers the front sleeve and the rear sleeve. The driving ring covers the front sleeve and the main sleeve. The sliding component is assembled to the driving ring. The lenses are disposed inside the front sleeve and the rear sleeve. The front sleeve has grooves and a first guiding part outside. The main sleeve has first threads and a second guiding part. Furthermore, the second guiding part engages with the first guiding part and the first threads on the main sleeve mesh with a plurality of second threads on the driving ring. The sliding components protrude from the driving ring into the grooves. When the driving ring rotates, the sliding components slide in the grooves and push the front sleeve along an axis to reciprocate.

Abstract: A lens barrel, including, a moving frame (2) to hold a lens (8), a direct-advance ring (4) provided on an outer periphery of the moving frame and movable relative to the moving frame in an optical direction, a resilient member (6) provided between the moving frame and the direct-advance ring, and a control part (10) provided on the moving frame to control an amount of movement of the direct-advance ring in the optical direction.

Abstract: A lens apparatus includes a first lens barrel member and a second lens barrel member coupled with the first lens barrel member via a cam mechanism. The first lens barrel member includes a stopper portion and a gear portion. The stopper portion comes into contact with a first contact surface formed in the second lens barrel member, when the first lens barrel member protruding from the second lens barrel member in the optical axis direction receives the external force from a front end side of the first lens barrel member in its protruding direction, to restrict a displacement of the first lens barrel member with respect to the second lens barrel member due to the external force. The gear portion comes into contact with a second contact surface formed in the second lens barrel member to restrict the displacement due to the external force.

Abstract: A lens module includes a lens barrel, a first lens, an adjusting disk and at least one first elastic member. The first lens has at least three first sloping portions thereon each having a lower end and a higher end gradually sloping from the lower end. The first sloping portions arranged end to end with the higher end of each first sloping portion being adjacent to the lower end of the corresponding adjacent first sloping portion, with the first sloping portions arranged on a common circular path. The adjusting disk has a first surface and an opposite second surface. The adjusting disk is rotatably mounted on the lens barrel. The adjusting disk has at least three first protrusions on the first surface thereof. The first protrusions respectively abut the first sloping portions of the first lens. The first elastic member biases the first lens toward the adjusting disk.

Abstract: An optical apparatus having a grip for gripping a camera body. The apparatus includes a lens element, a lens barrel configured to retain the lens element, a focus detection sensor disposed on an outer peripheral portion of the lens barrel, and a ring-shaped operation member configured to manually adjust at least focusing or zooming. The focus detection sensor is disposed on an outside of the ring-shaped operation member and on a same side as the grip of the camera body with respect to an optical axis of the lens element.

Abstract: There is disclosed a lens barrel including a fixed frame, a rotary frame rotatable with respect to the fixed frame to advance or retract in an optical axis direction, and a rectilinear guide frame rotatable relative to the rotary frame to displace integrally with the rotary frame in the optical axis direction. In this structure, a front end portion of the rectilinear guide frame on a subject side in the optical axis direction is exposed from the rotary frame.

Abstract: An optical apparatus having a grip for gripping a camera body. The apparatus includes a lens element, a lens barrel configured to retain the lens element, a focus detection sensor disposed on an outer peripheral portion of the lens barrel, and a ring-shaped operation member configured to manually adjust at least focusing or zooming. The focus detection sensor is disposed on an outside of the ring-shaped operation member and on a same side as the grip of the camera body with respect to an optical axis of the lens element.

Abstract: A projection lens including a front sleeve, a rear sleeve, a main sleeve, a driving ring, sliding components and lenses is provided. The main sleeve covers the front sleeve and the rear sleeve. The driving ring covers the front sleeve and the main sleeve. The sliding component is assembled to the driving ring. The lenses are disposed inside the front sleeve and the rear sleeve. The front sleeve has grooves and a first guiding part outside. The main sleeve has first threads and a second guiding part. Furthermore, the second guiding part engages with the first guiding part and the first threads on the main sleeve mesh with a plurality of second threads on the driving ring. The sliding components protrude from the driving ring into the grooves. When the driving ring rotates, the sliding components slide in the grooves and push the front sleeve along an axis to reciprocate.

Abstract: Power from a focusing motor (14) is transmitted via a gear (35a) to a focusing lead screw (15) so that a first lens holder (4) is moved in a direction of an optical axis. Power from a zooming motor (10) is transmitted via a gear (35b) to a zooming lead screw (11) so that a second lens holder (8) is moved in the direction of the optical axis. The first and second lens holders (4, 8), the focusing and zooming lead screws (15, 11), the focusing and zooming motors (14, 10), and the gears (35a, 35b) are contained in a housing (30, 31). The focusing motor (14) and the zooming motor (10) may be fixed to a gear case (30).