Abstract: A digital camera system is composed of a digital camera and a lens unit detachable to this digital camera. The digital camera includes a first taking lens and a first CCD image sensor to convert subject light into image data. The first taking lens is surrounded by a detachable decorative ring. When a hook release button is pressed to detach the decorative ring, a camera-side mount appears. The lens unit is attached to this camera-side mount, and photographing can be performed with a second taking lens and a second CCD image sensor in the lens unit.

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 digital still camera includes a lens unit and a camera body. The lens unit has a photographing lens, and a CCD for image pickup by detecting object light from the photographing lens. The camera body has a lens mount portion adapted to loading of the lens unit, and a camera contact for electrical connection with the lens unit. The lens unit has a lens unit coupling portion, engageable with the lens mount portion, for removable loading on the camera body. A lens connection contact touches the camera contact when the lens mount portion is engaged with the lens unit coupling portion, for electrical connection. A circuit board is connected with the CCD, has a first surface opposed to the camera body. The lens connection contact is mounted on the first surface. In preferred embodiment, a bayonet mechanism couples the lens unit coupling portion with the lens mount portion.

Abstract: A selectively mountable optical assembly having an optics body, at least one optical element, and a mounting base. Coupling structure allows the optics body to be selectively coupled to the mounting base such that a flange on the optics body is selectively aligned with the mounting base when in an engaged position.

Abstract: A camera includes a main unit which has an arc-shaped groove and a fixed hook formed on and projecting from the groove; and a bayonet ring which has, on the back face thereof, an arc-shaped projection to be engaged in the groove and a stop hook to go under the fixed hook and stopped by the fixed hook when the projection is engaged in the groove and rotated. The bayonet ring has a mark formed in a position on the front face thereof and a part of the bayonet ring which is furthest away from the mark is lifted by pressing the mark in a state that the bayonet ring is rotated up to a detachment position.

Abstract: A lens adapter is disclosed. The lens adapter includes: an adapter ring having a flexible fitting portion and an installation portion in which an optical component is mounted, the fitting portions being fitted over a fitting engagement portion of a lens ring mounted around a lens portion facing a front surface of an imaging apparatus; and a lock ring fitted over an outer surface of the adapter ring, the lock ring being manipulated so as to be moved between a locked position where the lock ring is opposite to the fitting portions fitted over the fitting engagement portion and flexure of the fitting portions is prevented and an unlocked position where the lock ring is retracted from the locked position.

Abstract: The invention relates to a device for rapidly changing objectives with threaded fastening on an optical instrument. The object of the present invention of specifying a device which in the case of a microscope with a threaded connection for the objective substantially simplifies the interchange of the objective and greatly shortens the time required for the interexchange, is achieved by a device for removably fitting an objective with an external thread on a corresponding internal thread of an optical instrument which comprises an instrument adaptor which has at one end an external thread corresponding to the external thread of the objective, and at the other end, a bayonet mount for fixably holding a bayonet base, and comprises an objective adaptor which has at one end a bayonet base which can be connected to the bayonet mount of the instrument adaptor, and at the other end an internal thread corresponding to the internal thread of the optical instrument.

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: To provide a lens mount structure which can align a lens optical axis with high accuracy without constituting a complicated lens mount structure, the lens mount structure for mounting a lens barrel to a main body of a camera, or the like, by retaining flange portions formed along an outer periphery of a base body of a lens barrel with retaining portions formed on a cylindrical mount disposed on a front of the support unit, the center of gravity of the cylindrical barrel between an front edge and the flanges, wherein reference surfaces for aligning a lens optical axis of the lens barrel mounted on the main body are formed on the respective flange portions; the reference surfaces are formed while facing the center of gravity of the lens barrel, and the reference surfaces are given a slope; and the retaining portions retain the flange portions while the reference surfaces formed on the flange portions remain in contact with retaining surfaces formed on the respective retaining portions.

Abstract: An image pickup apparatus which is capable of effectively removing dust attached to an optical member due to mounting/removing of a photographic lens in a power-off state, to thereby prevent degradation of image quality. In the image pickup apparatus, when position information of a contact brush that moves in a manner interlocked with mounting/removing of the photographic lens differs immediately after execution of power-on operation from position information obtained immediately after execution of power-off operation, it is determined that photographic lens mounting/removing operation was carried out during power-off, and a camera microcomputer outputs a warning advising cleaning of the optical member.

Abstract: A lens mount for viewfinder cameras, having a distance setting ring and, coupled thereto, an apparatus for transmitting the set distance to the setting lever of a measuring viewfinder arranged on the camera side. The apparatus contains an outer worm connected to the distance setting ring, an inner worm, inserted in said outer worm and guided rectilinearly in the lens mount, and a cam ring rotatably supported in the inner worm and with an axial cam pointing to the camera on the end face, is characterized in that the cam ring is locked into an annular groove in the inner wall of the inner worm and is provided with preferably two pins which point radially outward over the edge of the inner worm at the end of the camera side, and which engage in each case in an axial groove in the outer worm.

Abstract: A bayonet coupling including an annular groove and bayonet lugs on an inner ring-shaped member and an outer ring-shaped member; and insertion openings formed on either the inner ring-shaped member or the outer ring-shaped member which includes the annular groove. The bayonet lugs includes first bayonet lugs associated with the insertion openings to be insertable into the annular groove through the insertion openings, and a second bayonet lug for which no associated insertion opening is formed. The insertion openings, the first bayonet lugs and the second bayonet lug are shaped so that the second bayonet lug is insertable into the annular groove with axes of the outer and inner ring-shaped members being inclined to each other, and so that the first bayonet lugs are insertable into the annular groove through the insertion openings, respectively, after the second bayonet lug is inserted into the annular groove.

Abstract: An interchangeable objective for integrated rangefinder cameras is described, having a mechanically mounted objective head (1) and a spiral (14) with a bayonet fitting (15), the spiral (14) containing a spiral mechanism (16) for driving an objective head carrier (17) that is guided axially in a straight line and formed as a cylindrical ring, and a focusing ring (18) which is connected to the spiral mechanism (16) and can be actuated from outside, and is characterized in that, for the purpose of inserting a rear mount part (5) of the objective head (1) into the objective head carrier (17), the focusing ring (18) can be released from the spiral mechanism (16) by removing radially oriented connecting means (19) and can be pushed onto a front mount part (3) of the objective head (1), a threaded ring (7) is rotatably mounted on a central mount part (4) of the objective head (1), and the threaded ring (7) can be screwed (26) onto the objective head carrier (17) in order to connect the objective head (1) to the latt

Abstract: A bayonet mount includes a mount main body constituted of resin and a metal member that, at least partially, reinforces a bayonet tab portion at the mount main body.

Abstract: A linear-motion helicoid mechanism for a CCTV camera, comprising a lens frame for holding lenses, a key member, a helicoid female member and a rotating frame that is formed integrally with the helicoid female member. The lens frame comprises a cylindrical lens holder having helicoids and keyways on an outer periphery of the cylinder. The key member comprises a cylindrical part having keys for engagement with the keyways provided on the key member. The helicoid female member comprises a cylindrical part having helicoids that engage with the helicoids of the helicoid female member. The rotating frame and the helicoid female member are engaged together with a bayonet mechanism, so that the rotating frame fixes a position of the helicoid female member to the key member in the optical axis direction and supports it rotatably about the optical axis.

Abstract: Lens fixture for removably attaching a lens at an apparatus, which consists at least of, on one hand, a seat at the lens or at an adapter piece and, on the other hand, an attachment mechanism at the apparatus, which mechanism at least is composed of a carrier structure with an opening for providing the lens or adapter piece therein, and an elastically working pressing system comprising one or more substantially radially working pressing elements, which pressing system can cooperate with said seat of the lens, the adapter piece, respectively, and, in coupled condition of the lens or the adapter piece, exerts a permanent axial pressure force onto this latter, wherein the lens fixture comprises pressing elements formed by spring wire.

Abstract: A bayonet fixing device includes a cylindrical member; an annular member attached to one end of the cylindrical member; and a retainer ring attached to the cylindrical member to fix the annular member to the cylindrical member. The cylindrical member includes engaging lugs and insertion areas which are alternately arranged along the circumference at one end of the cylindrical member; grooves formed behind the engaging lugs; and recesses formed behind the grooves. The annular member includes a plurality of projections which are respectively fitted into the recesses via the insertion areas and the grooves. The retainer ring includes engaging blades which are fitted into the grooves via the insertion areas to be positioned between the engaging lugs and the projections in an axial direction of the cylindrical member.

Abstract: A securing device, for securing a light interception frame made of a resilient material to an end face of a lens frame, includes engagement projections and engagement surfaces provided on the peripheral surface of the lens frame, engagement legs and engagement pieces provided on the light interception frame having a light interception plate portion; wherein the light interception plate portion has an opening through which light can pass. The positional relationship between the plurality of engagement projections and the plurality of engagement legs, and the positional relationship between the plurality of engagement surfaces and the plurality of engagement pieces are such that when the engagement pieces engage with the engagement surfaces in a free state of the light interception frame, no engagement occurs, and the engagement legs are engaged by the engagement projections by elastically deforming the light interception frame.

Abstract: Telescopes have many accessories including astrophotography devices. A finely threaded accessory ring of conventional diameter is provided on these telescopes with the accessories being screwed thereinto with the constant danger of cross-threading. The present invention is threaded into the accessory ring of the telescope and on to the mating threads of the accessories. Through the use of the adapter of the present invention, the male adapter includes an outwardly projecting locking pin and the female adapter includes a mating, generally L-shaped locking slot to allow slide-on and twist locking and twist and slide-off unlocking. This can be accomplished in one to two seconds versus ten to twelve seconds to install and seven to eight seconds to remove accessories using the conventional thread-on, thread-off method.

Abstract: A bayonet fixing device includes a cylindrical member; an annular member attached to one end of the cylindrical member; and a retainer ring attached to the cylindrical member to fix the annular member to the cylindrical member. The cylindrical member includes engaging lugs and insertion areas which are alternately arranged along the circumference at one end of the cylindrical member; grooves formed behind the engaging lugs; and recesses formed behind the grooves. The annular member includes a plurality of projections which are respectively fitted into the recesses via the insertion areas and the grooves. The retainer ring includes engaging blades which are fitted into the grooves via the insertion areas to be positioned between the engaging lugs and the projections in an axial direction of the cylindrical member.

Abstract: A securing device, for securing a light interception frame made of a resilient material to an end face of a lens frame, includes engagement projections and engagement surfaces provided on the peripheral surface of the lens frame, engagement legs and engagement pieces provided on the light interception frame having a light interception plate portion; wherein the light interception plate portion has an opening through which light can pass. The positional relationship between the plurality of engagement projections and the plurality of engagement legs, and the positional relationship between the plurality of engagement surfaces and the plurality of engagement pieces are such that when the engagement pieces engage with the engagement surfaces in a free state of the light interception frame, no engagement occurs, and the engagement legs are engaged by the engagement projections by elastically deforming the light interception frame.

Abstract: A second camera system is different from a first camera system in size of film to be used.

Abstract: A lens barrel is provided with a first barrel and a second barrel. The first barrel has a flange formed around its outer surface, and the flange has a plurality of clearances formed around its outer edge. The second barrel has a plurality of projections formed around its inner surface so as to protrude radially inward. The first and second barrels are coupled together by inserting all of the projections into the clearances and then rotating one of the first and second lens barrels relative to the other so that the projections engage with the flange. The first and second barrels are coupled together in such a way as to rotate independently of each other about an optical axis and move together with each other along the optical axis. In addition, in this lens barrel, each of the clearances is so shaped as not to receive any projection other than the correspondingly shaped one.

Abstract: The surface groove 26c formed in the circumferential direction has a configuration 26x producing a shallow groove. Thus, relative rotation during lens attachment is accomplished without obstruction, and the strength of the bayonet pawls is improved by the enhanced thickness of the center portion by the formation of a gradual angle formation toward the exterior side of cylinder wall 20 from both ends of the surface groove toward the center portion thereof. This type of surface groove configuration 26x is formed at the three surface grooves 26a, 26b, 26c.

Abstract: A lens mount for a TV camera for mounting a lens having a bayonet ring on its rear face and a cylindrical projection which is smaller in diameter than the bayonet ring and extends rearward coaxially with the optical axis of the lens is provided with a camera-side bayonet ring which is movable between an engagement position where the camera-side bayonet ring is engaged with the lens side bayonet ring to hold the lens on the camera and a disengagement position where the bayonet rings are disengaged from each other to permit removal of the lens from the camera.

Abstract: A lens having radially extending members provided with convex engaging projections is positioned and secured in a lens supporting sleeve having L-shaped openings with recessed engaging grooves. The radially extending members are positioned with respect to a reference surface of the sleeve, and subsequently elastically deform circumferentially extending clamping arms of the sleeve as they are rotated into clamping portions of the L-shaped openings. The convex engaging projections are then snapped into the engaging grooves, holding the lens in position.

Abstract: A combination of camera bodies and detachable lenses including a lens-side and body-side bayonet mounting structure on two format types of lens and camera bodies to allow the mounting of a larger format lens to a smaller format body, and to preclude the mounting of a smaller format lens to a larger format body. The body-side mounts have mounting gaps of predetermined sizes, and the lens-side mounts have mounting members of predetermined sizes to fit in the mounting gaps. The larger format lens-side mounting member is sized to fit into both smaller and larger format mounting gaps, and the smaller lens-side mounting member is sized to fit into only the smaller format mounting gap. Common reference surfaces are provided to all of the mounts to position the lens in the radial and axial directions.

Abstract: A binocular includes an eye-piece tube, a first lens system associated with the eye-piece tube for providing a base magnification as seen through the eye-piece tube, and an eye-piece module having a second lens system therein which is interchangeably installed in the eye piece tube for changing the position of the first lens system to a position of a preset increase in magnification.

Abstract: A mount assembly having mounts which are provided on optical devices to be detachably attached to each other and which have mount surfaces which come into contact with each other when the optical devices are attached to each other through the mounts, wherein at least one of the mounts includes in combination a mount body which is made of synthetic resin and which is provided with the mount surface and a reinforcing metal ring member.

Abstract: An optical apparatus having a mount molded of plastic comprises a mount sliding surface formed on the mount and providing a fiducial surface in the direction of the optic axis, and a depression formed in the area of a parting line during molding on the mount sliding surface.

Abstract: An accessory lens for a far-infrared thermal imager which is quickly insted or removed to double the range. The accessory uses two or three element with alternating dielectric constants and combinations of spherical and aspherical surfaces.