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 zoom lens includes a cam roll, straight-forward units, lens groups, a driving unit, a detecting unit and a micro-processing unit. The lens groups moved by the cam roll sequentially varies from a receiving status to a zeroing status, a macro shooting-distance status and a wide shooting-distance status. A datum point of the cam roll corresponds to the zeroing status of the lens groups. The detecting unit includes an impeller, a detecting portion and a photonic sensor. When the photonic sensor detects the datum point of the cam roll, the micro-processing unit determines the position of the datum point of the cam roll and to reset the rotation count of the impeller. When the photonic sensor detects a skew point of the cam roll, the micro-processing unit determines and amends the rotation count of the impeller to be equal to a predetermined value.

Abstract: A method for making a camera module includes the steps of: (a) providing a mold with a mold cavity; (b) mounting at least a sensing element and a lens within the mold cavity in such a manner that the sensing element and the lens are spaced apart from each other; and (c) forming a camera barrel by injecting a molding material into the mold cavity and by molding the molding material over the sensing element and the lens.

Abstract: In the lens assembly, ventilation channels 15b1, 15c1, 15d1, and 15e1 passing between an object-side opening 15—1 and an image-side opening 15—2 of a barrel 15 are formed by processing inner surfaces 15b, 15c, and 15d of the barrel 15 and a surface 15e of the barrel 15. Thereby, when a taking lens 11 of a first group having an O-ring 16 fitted thereto is mounted into the barrel 15, air in the barrel 15 is pushed out from the image-side opening 15—2 of the barrel 15 through the ventilation channels 15b1, 15c1, 15d1, and 15e1.

Abstract: The invention comprises a method of and apparatus for coupling a lens port to a housing for an underwater camera. The method comprises the steps of providing an inwardly castellated ring and a co-operating outwardly castellated ring, the rings comprising part of or being positioned one on the housing and the other on the lens port. At least one of the rings is rotatable and the outwardly castellated ring can be passed through the inwardly castellated ring. Rotating at least one ring holds the outward castellations against the inward castellations to thereby hold the lens port to the housing.

Abstract: The device includes a lens port (1) for underwater photography attachable in use to housing. The port (1) has a control element which includes a knob (2) operable externally of the port (1) to engage and disengage a ring forming part of a camera lens positioned, in use, within the port (1). The construction will operate even if there is some misalignment between the port (1) and the lens during insertion of the lens into the port (1).

Abstract: A lens assembly includes: a lens group including a plurality of lenses; and a lens holder accommodating the lens group and having an opening in each of a front end face of the lens holder and a rear end face of the lens holder. The opening of the front end face has a smaller diameter than an outer diameter of a foremost lens accommodated in a foremost end face side of the lens holder, the lens holder includes a spacer ring disposed on a rear side of a rearmost lens accommodated in a rearmost end face side of the lens holder, the spacer ring abutting on a peripheral portion of the rearmost lens to keep a space between a rear face of the rearmost lens and the rear end face of the lens holder, and the lens holder holds a rear face of the spacer ring by thermal caulking.

Abstract: A surveillance camera has a housing, a photographic lens installed in the housing, and an adjustment mechanism connected to the photographic lens. The photographic lens has a first adjustable lens for adjusting distance, and a second adjustable lens for adjusting focal length. A distance adjustment ring is coupled to the first adjustable lens, and a focal length adjustment ring is coupled to the second adjustable lens. The adjustment mechanism has a support, a first adjustment screw, and a second adjustment screw. A first adjustment ring installed on the distance adjustment ring of the photographic lens has teeth corresponding to threading of the first adjustment screw, and a second adjustment ring installed on the focal length adjustment ring of the photographic lens has teeth corresponding to threading of the second adjustment screw.

Abstract: A lens module comprises a first lens, a second lens, a spacer, an adhesive and a lens barrel. The spacer is sandwiched between the first lens and the second lens, and includes a first surface, an opposite second surface, a lateral surface, a through hole and a plurality of cutouts. The lateral surface interconnects the first surface and the second surface. The through hole is defined in a central portion of the spacer. The cutouts are defined in the lateral surface. The adhesive is applied in the cutouts and interconnects the first lens with the second lens. The lens barrel receives the first lens, the second lens, the adhesive and the spacer therein.

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 improved lens barrel and related methods are provided. For example, in accordance with an embodiment of the present invention, a lens barrel includes a housing comprising a first section having a first diameter and a second section having a second diameter. A first lens element having a diameter approximately equal to the first diameter of the first section is enclosed by the first section of the housing. A second lens element is provided having a diameter approximately equal to the second diameter of the second section.

Abstract: A spacer (20), configured to be disposed between two lenses (12, 13) of a lens module (10) in order to separate the two lenses by a predetermined distance, includes a through hole (22) penetrating therethrough for permitting light to pass therethrough, and an upper surface (201) configured for receiving adhesive thereon. The upper surface has a slot (23) defined therein around the through hole. The slot is configured for receiving excess adhesive. A lens module using the spacer and a method of assembling the lens module are also provided.

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: In the lens assembly, ventilation channels 15b1, 15c1, 15d1, and 15e1 passing between an object-side opening 15—1 and an image-side opening 15—2 of a barrel 15 are formed by processing inner surfaces 15b, 15c, and 15d of the barrel 15 and a surface 15e of the barrel 15. Thereby, when a taking lens 11 of a first group having an O-ring 16 fitted thereto is mounted into the barrel 15, air in the barrel 15 is pushed out from the image-side opening 15—2 of the barrel 15 through the ventilation channels 15b, 15c1, 15d1, and 15e1.

Abstract: A lens assembly is provided and includes: a plurality of lenses; a lens frame having a hollow part which includes an opening on each of an object side and an image forming side of the lens assembly and into which the plurality of lenses are inserted with their optical axes aligned; and a first coating film provided on an image forming side surface of a first lens that is located nearest to the object side among the plurality of lenses inserted into the hollow part, the first coating film being more hydrophilic than that of a base body of the first 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: The present invention provides an optical option attachment ring comprising: a ring body into which a lens barrel is inserted; a clamping ring rotatably fastened on the periphery of the ring body; an elastic member arranged between the ring body and the clamping ring; and an abutting portion which is provided on the clamping ring and abuts on the elastic member according to the rotational position of the clamping ring to elastically deform the elastic member to cause at least a part of the elastic member to project further inwards than the inner peripheral surface of the ring body and to be positioned in a groove formed in the lens barrel.

Abstract: An optical glass lens set and a manufacturing method thereof are disclosed. An optical glass lens is used as an insert that is set into a cavity of a mold. By injection molding of the molded insert or press molding, an optical glass lens set with a lens holder is formed. The optical glass lens set includes at least one optical glass lens and a lens holder for fixing the optical glass lens. The manufacturing method simplifies processes and improves the yield rate. Moreover, the produced optical glass lens set is easily packaged into a camera lens, especially suitable for mini-cameras and camera phones.

Abstract: An optical component includes: an optical element; a sealing member in a ring shape arranged on the optical element; a stepped portion formed on a front of a circumference surface of the optical element; and a movement-restricting portion arranged at a rear of the optical element. The stepped portion restricts a movement of the sealing member toward a front of the optical element, and the movement-restricting portion restricts a movement of the sealing member toward a rear of the optical element.

Abstract: The positioning of the first through the third lenses in the optical axis direction is performed in the state that the optical axes are aligned by press-fitting the outer circumference surfaces of the first through the third lenses of the second lens group respectively to the first through the third lens holding portions of the lens frame and the state that the first reference plane of the first lens and the second reference plane of the second lens are contacted and the third reference plane of the second lens and the fourth reference plane of the third lens are contacted.

Abstract: A lens assembly has an image pickup device incorporated therein, and includes a zoom lens for passage of light to the image pickup device. A cam mechanism moves the zoom lens along an optical axis. The cam mechanism includes a rotatable zoom ring for zooming operation by rotating about the optical axis. There are an intake vent for air flow from an outside to an inner space, and an exhaust vent for air flow from the inner space to the outside. Plural fan blades are formed to project from the zoom ring, for propelling the air in the inner space upon the rotation for zooming, to dissipate heat by air flow. The fan blades are inclined relative to a rotational direction of the zoom ring. Furthermore, an air filter is porous and air permeable, secured inside each of the intake vent and the exhaust vent.

Abstract: An exemplary lens holder (30) includes a lens holding platform (35), a base (31), a resilient element (33), and three platform supporting members (32). The platform supporting members (32) connect the lens holding platform (35) with the base (31), and are aligned on different axes. The resilient element (33) is positioned between the lens holding platform (35) and the base (31), and configured for uniformly resisting the lens holding platform (35) away from the base (31). One of the three platform supporting members (32) is adjustable, thus adjusting a gradient of the lens holding platform (35) relative to the base (31).

Abstract: The joint between the projection system element and its support comprises an inorganic layer or a direct bond and is thus liquid tight, which can prevent deformation by an immersion liquid. The joint can be made either warm or cold. Solders, glue, and glue protection can all be used in the formation of this joint. In an embodiment, the elements and its support are made of quartz.

Abstract: An image-displaying apparatus comprising a light-emitting diode, a relay lens, a secondary light source-forming prism arranged between the light-emitting lens and the relay lens, and a light valve, said secondary light source-forming prism having opposed first and second opposed rectangular planes and at least four polygonal planes, said first and second rectangular planes being positioned on sides of the light-emitting diode and the light valve, respectively, and an area of the first rectangular plane being greater than that of the second rectangular plane, wherein a light emitted from the light-emitting diode is illuminated upon the light valve through the relay lens and the secondary light source-forming prism.

Abstract: An apparatus for assembling lens module (10) includes a firs tray (122), a second tray (142), and a robotic arm (16) with an optical element pick-up device (18). The first tray is configured for supporting a plurality of barrels thereon. The second tray is configured for supporting a plurality of optical elements thereon. The robotic arm with an optical element pick-up device is configured for picking up the optical elements from the second tray and assembling the optical elements into the barrels. The optical element pick-up device includes a plurality of suction mouths configured for picking up the plurality of optical elements at the same time.

Abstract: The present invention makes an objective lens easier to handle during disinfection or sterilization and protects the objective lens during, for example, transport, storage, or handling. The present invention provides an objective-lens protector including a substantially ring-shaped mounting portion surrounding a circumference of an objective lens, the mounting portion detachably mounted on the objective lens such that a threaded mount formed on the objective lens for mounting the objective lens to a microscope main body is exposed; a protecting member fixed to the mounting portion, extending substantially along the entire length of the objective lens mounted on the mounting portion, and arranged at a distance outwardly in a radial direction of the objective lens so as to surround the objective lens; and a locking mechanism provided on the mounting portion to prevent the objective lens from moving relative to the mounting portion in a circumferential direction.

Abstract: Optical assemblies for use in medical or other devices so as to image an object under examination onto an image sensor include a plurality of lens elements that can be retained in lens barrel. The lens elements and the lens barrel can be sealed with a compressible gasket. In one example, at least one lens element is made of an injection-moldable plastic and at least one lens element is made of a relatively dispersive optical glass. A lens barrel diameter or lens diameter can be selected to permit access to the object under examination with surgical or other tools. Aperture plates can be situated so as to reduce flare in the object image.

Abstract: A device driving a corrector ring of a corrector ring mounting objective lens mounted to an objective mounting and dismounting section of a revolver includes a rotation driving mechanism having a motor and a turning effort transmitting section which transmits a turning effort of the motor to the corrector ring of the corrector ring mounting objective lens mounted to the revolver to drive the corrector ring; and a connection unit for connecting the turning effort transmitting section to the corrector ring of the corrector ring mounting objective lens introduced into an observation optical path in association with a switching operation performed by the revolver and disconnecting the turning effort transmitting section from the corrector ring of the corrector ring mounting objective lens removed from the observation optical path.

Abstract: A lens assembly includes: a lens group including a plurality of lenses; and a lens holder accommodating the lens group and having an opening in each of a front end face of the lens holder and a rear end face of the lens holder. The opening of the front end face has a smaller diameter than an outer diameter of a foremost lens accommodated in a foremost end face side of the lens holder, the lens holder includes a spacer ring disposed on a rear side of a rearmost lens accommodated in a rearmost end face side of the lens holder, the spacer ring abutting on a peripheral portion of the rearmost lens to keep a space between a rear face of the rearmost lens and the rear end face of the lens holder, and the lens holder holds a rear face of the spacer ring by thermal caulking.

Abstract: An exemplary lens module includes a barrel, a metallic spacer, and a glass lens. The metallic spacer is disposed in the barrel. The metallic spacer has a through hole defined therein. The glass lens is received in the through hole of the metallic spacer.

Abstract: A digital camera module (100) includes a lens module (20) and a chip package (50) mounted in a light path of the lens module. The lens module includes a first lens assembly (21) and a second lens assembly (23). The first lens assembly includes a first fixture (211) having a through hole (212) defined therein and at least one lens (218) received in the through hole. The second assembly includes a second fixture (23) having a through hole (232) defined therein and at least one lens (238) attached therein. One of the first fixture and the second fixture has a slotted annular ring (213) protruding therefrom with an annular slot (214) defined therein. The other has a male annular ring (235) extending therefrom, and the slotted annular ring and the male annular ring matingly engage with each other to fix the first lens assembly and second assembly together.

Abstract: A linear mechanical drive has an outer housing, a drive sleeve that is conformably and slidably received within the outer housing, a mount sleeve conformably and slidably received within the drive sleeve, and a guide extending between the outer housing and the mount sleeve to prevent the mount sleeve from rotating relative to the outer housing. A linearly driven structure is affixed to the mount sleeve. There is a first helical engagement between the outer housing and the drive sleeve, and a second helical engagement between the mount sleeve and the drive sleeve. A motor is positioned to actuate the drive sleeve engagement.

Abstract: A holding system for holding an optical element. The holding system includes a ring-like inner holding member disposed at an outer periphery of the optical element, for supporting the optical element by use of at least a pair of pieces, and a ring-like outer holding member disposed at an outer periphery of the inner holding member and connected to the inner holding member at plural points. The inner holding member has at least a pair of driving units with an actuator, for supporting the optical element through the actuators.

Abstract: A lens element has an annular flange portion which has a tapered lateral surface so as to form at least an annular clearance tapering from a rear edge thereof when it is received in a lens holder. An adhesive which is partly filled in the clearance curs in wedge-shape to secure the lens element to the lens holder, and besides forming wedges by which the lens element is forced and held in an axial direction so as thereby to prevent the lens element from falling out of the lens holder even if the adhesive exfoliates from either one or both of the lens element and the lens holder.

Abstract: A lens is fitted into a metal ring that covers the outer peripheral surface of the lens and can be soldered to a fixture member. The side cylindrical part of the metal ring is expanded toward the outer peripheral direction thereof by the pressure of the optical material put inside it, and, thus expanded, it defines the final dimension of the metal ring. One of the two openings formed on both sides of the side cylindrical part of the metal ring is so designed as to have a curving cylindrical part that extends from the side cylindrical part, and this curving cylindrical part is folded toward the optical functional face of the optical device to construct a metal ring-fitted optical device.

Abstract: The present invention provides an optical option attachment ring comprising: a ring body into which a lens barrel is inserted; a clamping ring rotatably fastened on the periphery of the ring body; an elastic member arranged between the ring body and the clamping ring; and an abutting portion which is provided on the clamping ring and abuts on the elastic member according to the rotational position of the clamping ring to elastically deform the elastic member to cause at least a part of the elastic member to project further inwards than the inner peripheral surface of the ring body and to be positioned in a groove formed in the lens barrel.

Abstract: A lens barrel is provided and includes a barrel main body; lens frames supported by the barrel main body so as to be movable in the direction of an optical axis; a focus ring and a zoom ring which are rotatably supported by the barrel main body and move the lens frames in the direction of the optical axis; and a diaphragm device attached to the barrel main body. The focus ring and the zoom ring come into contact with a rotation regulatory section of the diaphragm device, whereby rotation of the focus ring and rotation of the zoom ring are regulated.

Abstract: A taking lens system includes, in order from an object side thereof, a first lens group (negative refracting), a second lens group (positive refracting), an aperture stop and a third lens group (positive refracting). Focusing from an infinite distance to a finite distance is performed by setting the second lens group and the third lens group such that the position of the second lens group upon focusing on a finite distance is located on an image side of the taking lens system with respect to the position of the second lens group upon focusing on an infinite distance and the position of the third lens group upon focusing on a finite distance is located on an object side of the taking lens system with respect to the position of the third lens group upon focusing on an infinite distance, while the first lens group remains fixed.

Abstract: A lens body tube includes a main tube, at least one lens configured movable along the optical axis direction of the lens body tube in the main tube, a first ring configured to be rotated for a zooming operation, the first ring being disposed around the outer circumference of the main tube, a second ring configured to be rotated for a focusing operation, the second ring being disposed around the outer circumference of the main tube, a third ring configured to be rotated by the first ring, the third ring being disposed inside the main tube, a fourth ring configured to be translated along the optical axis direction by rotation of the third ring, the fourth ring being disposed inside the main tube, a fifth ring configured to be rotated by the second ring, and at least one lens frame, of the at least one lens, supported by the fifth ring. The fifth ring is screwed together with the fourth ring.

Abstract: A projection lens regulator for a projection television includes a base, a barrel and an immobilizing hoop. The base has an annular wall, a slope guide slot at the annular wall, and a resilient flexible sheet defined by a pair of incisions at an upper side of the annular wall. The barrel is fitted inside the annular wall of the base and has an annular wall and a slope guide rib at an outer surface of the annular wall of the barrel. The slope guide rib is movably received in the slope guide slot of the base. The immobilizing hoop has an annular wall fitted on the base, and an arched convexity, which is formed at an inner surface of the annular wall thereof, corresponding in position to the flexible sheet of the base.

Abstract: A retracting mechanism of a retractable lens includes an external barrel movable in an optical axis direction, an adjustment frame positioned in the external barrel and configured to be guided linearly in the optical axis direction, a stopper configured to set a rear movement limit of the adjustment frame with respect to the external barrel, a lens frame configured to hold a lens group, the lens frame configured to be screwed into the adjustment frame, a fixing frame fixed to the external barrel and configured to prevent the adjustment frame from coming off the external barrel, and at least one spring positioned between the fixing frame and the adjustment frame and configured to bias the adjustment frame toward the rear movement limit of the adjustment frame with respect to the external barrel.

Abstract: A retracting mechanism of a retractable lens includes an external barrel movable in an optical axis direction, an adjustment ring positioned in said external barrel and configured to be guided linearly in the optical axis direction without rotating, a stopper configured to set a rear movement limit of said adjustment ring with respect to said external barrel, a lens frame configured to hold a lens group, said lens frame configured to be screwed into said adjustment ring, a fixing ring fixed to said external barrel and configured to prevent said adjustment ring coming off said external barrel, and at least one spring positioned between said fixing ring and said adjustment ring and configured to bias said adjustment ring toward the rear movement limit of said adjustment ring with respect to said external barrel.

Abstract: A lens adapted for securement to a holder, for transmission of light, comprising a lens body, defining an axis, threading on the lens body extending about said axis, for reception in threading associated with the holder.

Abstract: A latch mechanism for producing a releasable connection of a housing portion with a further housing portion provides projections on one of the housing portions, and for producing a releasable connection by means of a rotational motion of the housing portions relative to one another, the latch projections latchingly engaging in associated latch recesses, where the latching mechanism includes a rotatably mounted ring element including the recesses for receiving the projections. The latching mechanism can be connected by means of further latch recesses and further latch projections to the further housing portion.

Abstract: A lens assembly includes a housing having a housing body, a cylindrical bore in the housing body with an internal bore surface and a cylindrical housing axis, at least one access window through the housing body that permits external access to an interior of the housing body, and an interior helical recess in the bore surface. A cylindrical lens element has an external cylindrical lens element surface received within the cylindrical bore of the housing and a cylindrical lens-element axis coincident with the cylindrical housing axis. The lens element includes a lens positioned perpendicular to the cylindrical lens-element axis, an adjustment engagement that is externally accessible through the access window of the housing, and an exterior helical recess in the external cylindrical lens element surface. The exterior helical recess has the same pitch as the interior helical recess and is in facing relation to the interior helical recess.

Abstract: A rod integrator holder 6 has concave clearance grooves 67A to 67D elongated in the direction of the optical axis L, at the corners within a case 61 thereof. The clearance grooves 67A to 67D are configured such that the edges 84A to 84D of the rod integrator 8 can be prevented from coming into contact with the inner faces 66A to 66D of the case 61. The edges 84A to 84D of the rod integrator can be prevented from being broken by coming into contact with the inner faces 66A to 66D of the case 61, and the edges 84A to 84D of the rod integrator 8 and the inner faces 66A to 66D of the case 61 can be prevented from rubbing against each other to generate dust due to abrasion.

Abstract: A rod integrator holder comprises a wall constituting at least a part of an intermediate portion interposed between a rod integrator in an illumination optical system or a holding member for the rod integrator, and an optical member disposed downstream the rod integrator or a holding member for the optical member. The intermediate portion tightly closes a space between a light entrance end of the optical member and a light exit end of the rod integrator against surroundings thereof.

Abstract: A rib, provided on an outer periphery of a projection ring, includes: a first rib extending along a direction in which an optical axis of a lens main body extends (an attachment direction of a focus lens); and a second rib, brought into contact with one end of first rib, extending along a direction approximately orthogonal to first rib so as to have one side and the other side. On the other hand, a protrusion, provided on an inner periphery of the cylindrical focus ring, includes a pair of protrusion parts arranged with a spacing in a direction in which an optical axis extends. With this structure, it is possible to obtain a projector having a focus ring capable of being easily attached to a lens main body and being easily molded.

Abstract: An individual carrier for an optical lens comprising, in a plastics one-block single part as directly molded: a globally ring-shaped base (1) with a central axis (100) and a median plane perpendicular to such a central axis, at least three plots (2, 3, 4; 52, 53, 54) projecting from the internal edge (5) of the base (1) for holding the lens through its edge, at least one (4) of such plots being resiliently moveable in translation along a radial direction (101) relative to said axis, between an internal rest position and a range of active external positions, a spring (6, 7) arranged between the moveable plot (4) and the base (1) for exerting a resilient return stress of the moveable plot (4) towards its rest position.

Abstract: A mechanical device includes a female component having a right-circular cylindrical internal surface and a cylindrical axis, and a first helical recess in the internal surface of the female component. A male component having a right-circular cylindrical external surface is sized to be slidably received within the right-circular cylindrical internal surface of the female component and has a second helical recess in its external surface. The second helical recess has a helical pitch which is the same as that of the first helical recess, so that the second helical recess is in facing relationship along its length to the first helical recess when the male component is assembled to the female component. A retainer is received within the first helical recess and the facing second helical recess when the male component is assembled to the female component. The retainer has an organic plastic retainer outer surface, preferably a polytetrafluoroethylene retainer outer surface.