Abstract: A diaphragm driving device is provided in a camera body of a digital camera to which an interchangeable lens is detachably attached, the interchangeable lens including a diaphragm mechanism having a diaphragm control bar for changing an aperture size by a rotation of the diaphragm control bar about an optical axis. The camera body includes a diaphragm-driving slide plate which engages with the diaphragm control bar when the interchangeable lens is attached to the camera body; a diaphragm drive motor which rotates in both forward and reverse directions for moving the diaphragm-driving slide plate step wise in accordance with object brightness information of an object image formed through the interchangeable lens; and a converting mechanism for converting the rotation of the diaphragm drive motor in the both directions into a force for moving the diaphragm-driving slide plate.

Abstract: A camera aperture includes a first polarizer and a second polarizer with a polarization 90° with respect to the first polarizer. The second polarizer has a through hole at a center. A polarizing rotator is disposed between the first polarizer and the second polarizer. A size of the aperture is changed when a voltage is applied selectively to the polarizing rotator.

Abstract: To provide a camera that is suited to shoot both a demagnified image and a magnified image. The camera includes a housing body 11 containing a CCD 15, and a lens barrel 12. An abutted member 20 having an objective lens 40 therein is engaged with the lens barrel 12 and a rotatable manually-controlled member 30 is fitted around that lens barrel. The abutted member 20 moves back and forth in the direction of an optical axis K in response to the rotation of the manually-controlled member 30. A user moves the objective lens 40 back and forth by moving the abutted member 20 back and forth to shoot either a demagnified image or a magnified image. A demagnified image is photographed with the abutted member 20 contained in the lens barrel 12. A magnified image is photographed with the abutted member 20 projected from the lens barrel 12. An end of the abutted member 20 is positioned so that the focal point of the objective lens 40 falls on the center thereof.

Abstract: Image capture methods and systems. When a shutter of a camera is pressed, a diaphragm of the camera is set to a maximum diaphragm, and an image is photographed accordingly. The diaphragm is switched to a next level diaphragm of the maximum diaphragm, and another image is photographed accordingly. The switch of the diaphragm and the photographing is repeated until the diaphragm is the minimum diaphragm.

Abstract: An aperture apparatus includes a substrate having a lens opening, a first aperture sector having a first aperture opening, a second aperture sector having a second aperture opening, and a drive pin that is engaged in cam openings respectively formed in the first aperture sector and in the second aperture sector and that swings the first aperture sector and the second aperture sector. The first aperture sector and the second aperture sector are located in receding positions from the lens opening, when the drive pin is in an initial position. The cam openings include a swing region and a non-swing region, the swing region guiding a corresponding sector to the lens opening as the drive pin moves from the initial position, the non-swing region retaining the other sector in the receding position, when one of the first aperture sector and the second aperture sector is guided to the lens opening.

Abstract: A light controller includes a substrate that has an optical path opening; at least a pair of blades that is reciprocally supported on the substrate and opens and closes the optical path opening; and a driver unit that drives the opening and closing of the pair of blades. The pair of blades is displaced movably on the substrate between an open position where the optical path opening is opened and a closed position where the optical path opening is closed by overlapping with each other. The driver unit and the pair of blades are connected for driving by a transmission unit, and the transmission unit transmits drive power such that one of the pair of blades can be moved at a higher speed than the other blade within a predetermined travel range between the open position and closed position.

Abstract: A stopper, a stop aperture and a lens support portion are integrally formed to a lens base. The stopper hits a shutter blade when the shutter blade swings in an open direction and the shutter speed is set. The stop aperture controls light amount of subject light that passes through the taking lens and reaches the photo film. The lens support portion positions the taking lens in an optical axis direction. Position of the stopper and size of the stop aperture and position of the lens support portion are different depending on model of a lens fitted photo film unit. Each model of the lens fitted photo film unit is manufactured by selecting the lens base.

Abstract: This invention prevents a degradation in image quality resulting from undesirable reflected light and undesirable transmitted light generated near the ridgeline of the edge portion of an optical element including an aperture blade or an ND filter. The aperture edge of the aperture blade cooperates with the aperture edge of another aperture blade to form an almost rhombic aperture. A small saw-toothed and non-periodic uneven portions having various sizes are formed along two, front and rear ridgelines of the aperture edge and along those of the ND filter. When incident light beams strike the aperture edge of the aperture blade or the edge of ND filter, the uneven portions formed at the ridgeline reflect them in various directions.

Abstract: A process for producing a light amount-adjusting member, such as an ND filter, that comprises the steps of providing a transparent base material and a coloring liquid; and applying a coloring liquid to the base material by ejecting the coloring liquid to the base material to form a colored portion having a specified optical density, wherein the coloring liquid contains at least one coloring material of with a maximum absorption wavelength in a range of 630 to 750 nm, when measured on the transparent base material.

Abstract: Provided is a light amount control device eliminating a deviation in image forming position over the entire area of the variable range of an aperture due to an ND filter and assuring smooth stopping operation. The light amount control device of the present invention includes: a first shading member and a second shading member which are adapted to move within a plane perpendicular to an optical axis to vary an area of a light passage opening; a lever member which is connected with the first shading member and the second shading member and which is rotatable; an actuator for driving the lever member; and an ND filter mounted to the first shading member. The ND filter is configured to cover an entirety of the light passage opening in an open state, and the second shading member has a guard portion which, with the light passage opening being in a closed state, is arranged between the lever member and the ND filter, preventing the ND filter from coming into contact with the lever member.

Abstract: A light amount adjustment member, which causes little deterioration of image quality by diffraction at a grain boundary between ink dots in a colored portion, can be simply produced at low production cost and high yield. The light amount adjustment member has a density distribution such that an optical density varies continuously or stepwise. The process comprises steps of providing a transparent base material having a receptive layer comprised of a material capable of absorbing a coloring liquid and containing a resin and crosslinking agent, applying the coloring liquid to the layer using an ink-jet recording method to form a light amount adjustment region having a particular optical density region, storing the layer under a prescribed environment after application of the coloring liquid to the layer to cause dots formed by the coloring liquid to bleed and crosslinking the resin contained in the layer by the crosslinking agent.

Abstract: A light shielding blade material is provided for an optical apparatus and has at least three prepreg sheets each being comprised of an epoxy resin of a thermosetting type as a matrix resin and containing a fiber drawn in an alignment direction within the matrix resin. These prepreg sheets are superposed upon each other so that the alignment directions of the fibers of the prepreg sheets disposed adjacent to each other cross at right angles to each other. The material has also two or more films each being comprised of an epoxy resin of a non-cured state as a base resin and containing 15 to 40 weight % of carbon black in the epoxy resin. These films are disposed to form a laminate of the prepreg sheets and the films so that the prepreg sheets contact one surface or both surfaces of each film.

Abstract: The present invention is directed to a lens diaphragm device that can avoid a degradation of an image due to both diffraction of a light beam and flares. The diaphragm device includes two diaphragm vanes (2 and 4) that respectively have notches (28 and 36) opposed to each other in a single plane perpendicular to an optical axis (O), and two of the vanes are moved close to and apart from each other in the single plane so as to vary an aperture of the lens diaphragm. The lens diaphragm device also includes two optical filters (6 and 8) used to reduce a quantity of a beam of light passing through the diaphragm, and an aperture of the diaphragm defined by edges of the optical filters and the notches of the vanes is shaped to be asymmetrical about straight line which crosses the optical axis and is perpendicular to directions of the motion of the vanes.

Abstract: A control module between to a lens barrel and a camera body contains a focus driver and an iris and associated aperture control. The control module interacts electronically and mechanically with the camera body and the lens barrel to position lens systems within the barrel.

Abstract: An iris diaphragm comprising an annular base, an annular rotatable element and a number of leaves which can be mounted to form a variable aperture, each leaf extending between the base and element and being connected thereto in a pivotal relationship, is characterised in that a first end of each of said leaves is pivotally connected to an opening provided on the element or base by means of a burst hole joint, and a second end of each of said leaves being rotatably secured in a sliding relationship to a slide provided on the base or the element by means of a slide pin secured to the leaf.

Abstract: There is disclosed a light amount adjustment apparatus for adjusting a state of a flux passed through an aperture having a predetermined aperture diameter, the apparatus comprising: a light amount adjustment member in which a first region having a predetermined transmittance to the flux and a second region for blocking the flux are disposed on the same base material. In the light amount adjustment apparatus, although an optical filter is integrally constituted with a diaphragm blade, there is little positional shift of an ND filter, a shape of the ND filter has a degree of freedom, deterioration of resolution of an image is improved for use in optical apparatuses such as a photographing apparatus, optical properties are superior, the whole apparatus can be miniaturized, and cost reduction of a product can be achieved.

Abstract: To aim at achieving reduction in size and weight of a diaphragm device provided with an optical filter insertable into and retractable from a light path, so that the diaphragm device can be easily installed into a lens tube of a CCTV camera.

Abstract: To aim at achieving reduction in size and weight of a diaphragm device provided with an optical filter insertable into and retractable from a light path, so that the diaphragm device can be easily installed into a lens tube of a CCTV camera. The diaphragm device comprises a diaphragm board 10 having an aperture 10a forming a light path, a pair of diaphragm blades 12 and 13 disposed on one face of the diaphragm board and adjusting the aperture of the diaphragm for the light path by sliding along the board face, a diaphragm driving device 20 driving the diaphragm blades 12 and 13 to adjust the aperture of the diaphragm for the light path, an optical filter (infrared cutoff filter) 15 having transmission characteristics in accordance with a wave length, and a filter driving device 30 to insert the optical filter into and retract it from the light path.

Abstract: Diaphragm blades move in a direction approaching to or separated from an optical axis of an incident light at the time of operation. Opening edges of the diaphragm blades are provided with neutral density (ND) filters having a predetermined transmittance to pass the incident light. Edges of the ND filters are provided with inclined surfaces having a predetermined angle with respect to the optical axis. With this configuration, flare is suppressed and image quality is enhanced.

Abstract: A camera includes a preset open aperture for introducing object light to photo film. A taking lens is disposed in a light path of the object light, and has two lens elements. In the camera, an aperture stop changing device is provided. An aperture changing plate includes a stop-down opening having a small diameter, is disposed close to the taking lens, is movable between a small diameter position and a large diameter position. The stop-down opening, when the aperture changing plate is in the small diameter position, is set in the light path for stopping down the preset open aperture, and when the aperture changing plate is in the large diameter position, is set away from the light path. A spacer is secured to a partial section of a peripheral portion of the taking lens, for defining a passage gap or cutout at a remaining partial section of the peripheral portion of the taking lens. The passage cutout allows passage of the aperture changing plate moving between the small and large diameter positions.

Abstract: A light-quantity adjusting apparatus is disclosed, in which a light-blocking member and an optical filter can be driven with a single actuator, and which can be made compact. The light-quantity adjusting apparatus includes a light-blocking member that changes a quantity of light through an open/close operation within an optical path, an optical filter that can be inserted into and withdrawn from the optical path, independently from the light-blocking member, and a driving mechanism that has a single actuator as a driving source and that drives the light-blocking member and the optical filter. The driving mechanism drives the optical filter by operating the actuator further in an opening direction after the actuator has driven the light-blocking member into an open position, and operating the actuator further in a closing direction after the actuator has driven the light-blocking member into a closed position.

Abstract: A lens-fitted photo film unit is provided with a movable stop plate formed with small and middle stop apertures. The small stop aperture has a smaller diameter, and the middle stop aperture is larger than the small stop aperture. A fixed large stop aperture, which is larger than the middle stop aperture, is disposed behind the movable stop plate. The movable stop plate is moved to position the small stop aperture at a photographic optical axis when subject brightness is a predetermined reference value or more. Similarly, the middle stop aperture is positioned at the optical axis when the subject brightness is less than the reference value and a flash switch is turned off. Further, the fixed large stop aperture is set to the optical axis when the subject brightness is less than the reference value and the flash switch is turned on.

Abstract: There is disclosed a light amount adjustment apparatus for adjusting a state of a flux passed through an aperture having a predetermined aperture diameter, the apparatus comprising: a light amount adjustment member in which a first region having a predetermined transmittance to the flux and a second region for blocking the flux are disposed on the same base material. In the light amount adjustment apparatus, although an optical filter is integrally constituted with a diaphragm blade, there is little positional shift of an ND filter, a shape of the ND filter has a degree of freedom, deterioration of resolution of an image is improved for use in optical apparatuses such as a photographing apparatus, optical properties are superior, the whole apparatus can be miniaturized, and cost reduction of a product can be achieved.

Abstract: In a holding frame of the aperture mechanism is formed a holding portion to which is to be fitted a drive mechanism for opening and closing aperture blades. The holding portion can be fitted with either an electrical drive mechanism, having an iris meter, for electrically opening and closing aperture blades and or a manual drive mechanism for supporting rotatably an iris ring to manually open and close the aperture blades. Thus, an aperture mechanism whose manufacturing cost can be substantially reduced by enabling either or both of an electrical drive mechanism for electrically driving aperture blades and a manual drive mechanism for manually driving them to be fitted to a common holding frame of the aperture mechanism is to be provided.

Abstract: A taking lens is held by a lens-holding rib, behind which an opening is formed as an aperture-stop. A stop plate is disposed behind the taking lens and is formed with a stop aperture, which is smaller than the aperture-stop. The lens-holding rib is formed with a cut portion through which an end portion of the stop plate is inserted to position the stop aperture at a photographic optical axis. Upon sliding a switch member upward, a setting segment thereof pushes up an abutting pin integrally formed with the stop plate so that the stop plate is rotated to move toward the outside of the lens-holding rib through the cut portion. Hence, the stop aperture of the stop plate is evacuated from the photographic optical axis.

Abstract: A lens assembly comprises an aperture and a lens group consisting of a first, a second, a third, and a fourth lens element. The first lens element is a bi-convex lens element disposed at the front side of the lens assembly. The second lens element is a bi-concave lens element. The third lens element is a meniscus lens element with its convexity facing the rear side of the lens assembly, and the fourth lens element is a bi-convex lens element disposed at the rear end of the lens assembly. The aperture is disposed on the front side of the first lens element.

Abstract: A diaphragm switching apparatus according to the present invention comprises a gear adapted to rotate in response to a driving force of a focus motor used for driving a focus lens; a shaft for rotatably supporting the gear; a diaphragm switching means, secured to the shaft 12 and adapted to rotate together with the shaft, for switching a diaphragm upon rotating; an intermediate member engaging the diaphragm switching means so as to rotate together with the shaft and being slidable axially with respect to the shaft; an urging means for urging the gear away from the diaphragm switching means by way of the intermediate member by receiving a reaction force from the diaphragm switching means; and a holding part 12a for receiving the gear urged by the urging means.

Abstract: A taking lens is held by a lens-holding rib, behind which an opening is formed as an aperture-stop. A stop plate is disposed behind the taking lens and is formed with a stop aperture, which is smaller than the aperture-stop. The lens-holding rib is formed with a cut portion through which an end portion of the stop plate is inserted to position the stop aperture at a photographic optical axis. Upon sliding a switch member upward, a setting segment thereof pushes up an abutting pin integrally formed with the stop plate so that the stop plate is rotated to move toward the outside of the lens-holding rib through the cut portion. Hence, the stop aperture of the stop plate is evacuated from the photographic optical axis.

Abstract: A camera includes a first lens unit, formed of a plurality of lenses, on which a light beam is incident from a subject, a reflective mirror for reflecting a light beam, which has come from the subject and has been transmitted through the first lens unit, in a direction substantially perpendicular to the optical axis of the first lens unit, a first diaphragm member which is arranged on a surface of a lens of the first lens unit closest to the reflective mirror with the surface of the lens facing the reflective mirror, and which blocks unwanted rays of light other than the light beam that contributes to the forming of the image of the subject on an image formation surface, a second lens unit, formed of a plurality of lenses, on which the light beam reflected from the reflective mirror is incident, a second diaphragm member which is arranged between the first lens unit and the second lens unit, and blocks unwanted rays of light that travel outside the outermost periphery at which the light beam forming the subje

Abstract: A lens-equipped film unit comprises a photographing mechanism including a photographic lens, a shutter of a fixed speed, an aperture and a strobe, and an unexposed photographic film has being charged therein. The photographing mechanism satisfying the relationship: 7.0≦log2(G2)+log2(1/T)≦12.5, wherein T represents shutter speed (sec) of the shutter and G represents guide number (ISO 100.m) of the strobe. The film unit further comprises a photometer to measure a subject light quantity and to output light quantity signal corresponding to the subject light quantity, and an exposure quantity controller toward the charged photographic film in accordance with the light quantity signal.

Abstract: A camera adapted to receive any one of a plurality of film loads having different film speeds includes a film speed sensing device for sensing the particular film speed of a film load in the camera, an aperture setting device adjustable to effect different-diameter film exposing apertures, a shaped memory alloy (abbreviated to SMA) wire which when subjected to electrical current for different durations corresponding to the respective film speeds of the film loads is heated to undergo corresponding shape changes to adjust the aperture setting device to the respective film exposing apertures, and a current supplying circuit connected to the SMA wire and to the film speed sensing device that subjects the SMA wire to electrical current for any one of the durations in accordance with the particular film speed of a film load in the camera.

Abstract: A stop device of the present invention mainly comprises a cam frame M (frame member), a flare stop (stop member) and a key ring for guiding the linear movement of the flare stop. When a lens barrel is collapsed, the cam frame M is driven linearly, whereas then the lens barrel is zoomed, it is rotated as well as advanced and retracted. The flare stop is accommodated in the vicinity of the frame M in a collapsed state, and the arm sections of the flare stop are reliably secured by the key ring and the cam frame M in a photographing state. Consequently, according to the stop device, the stop device can obtain a good flare stop state by securing a proper distance between itself and the cam frame M. Further, the space occupied by the stop device can be reduced and the lens barrel to which the stop device is assembled can be reduced in size.

Abstract: The diaphragm for an objective lens in a camera includes a circular series of coilable resilient opaque electrodes that are biased to curl into respective coils radially outward to make the size of an aperture larger and are electrostatically actuatable to uncurl from the coils radially inward to make the size of the aperture smaller, a transparent flat stationary electrode that is positioned parallel to the coilable electrodes when the coilable electrodes are uncurled from the coils, a peripheral conductor that encircles the coilable electrodes and has respective conductive connections to each one of the coilable electrodes, and one conductive lead attached to the peripheral conductor and another conductive lead attached to the stationary electrode for together applying an electric potential between the coilable electrodes and the stationary electrode to electrostatically actuate the coilable electrodes to uncurl.

Abstract: An aperture and lens mechanism for a camera, includes a rotatably mounted lens barrel supporting a lens and moveable in a direction parallel to the optical axis of the lens in response to rotation; an aperture support mounted for movement parallel to the optical axis of the lens and spring biased into contact with the lens barrel for movement therewith; and an aperture blade defining an aperture, the aperture blade being mounted on the aperture support for movement between a first position where the aperture is centered on the optical axis of the lens and a second position away from the optical axis of the lens.

Abstract: A portable zoom camera obscura comprising: a telescopic structure including an inner tube and an outer tube positioned concentrically and slidingly movable relative to each other; a cover with a small, centered imaging hole attached to the imaging end of the outer tube; a semitransparent screen covering the inner end of the inner tube; a cover having a viewing hole and attached to the viewing end of the inner tube; and a diaphragm disk or ruler mounted on the imaging end, and including an aperture which can be positioned in a series of continuous overlapping positions with the imaging hole. The diaphragm disk or ruler also include lenses with different focal lengths, which, when positioned in front of the imaging hole allow the camera obscura to function as a photo-camera.

Abstract: An optical apparatus includes a first movable optical member, a second movable optical member, different from the first optical member, and a driving mechanism engaged with the second optical member, and operable in a first operation mode, in which the second optical member is movable by an electrical driving operation of the driving mechanism, and a second operation mode, in which the second optical member is movable by a manual driving operation. Operation of the driving mechanism is switched between the first operation mode and the second operation mode by control means such as a CPU, wherein, when the driving mechanism is operable in the second operation mode, the control means switches operation of the driving mechanism to the first operation mode in response to a driving operation of the first optical member.

Abstract: A fixed stop plate formed with a fixed stop aperture is provided behind a taking lens constituted of a first lens and a second lens. A movable stop plate formed with a smaller stop aperture is disposed behind the fixed stop aperture such that an interval between the fixed stop plate and the movable stop plate is 1.5 mm or less. A photo film is positioned behind the movable stop plate. As to the light focusing on the photo film, its portion having greater color aberration is intercepted by the movable stop plate. Thus, quality of an image recorded on the photo film is prevented from being deteriorated due to the color aberration.

Abstract: A drive mechanism for moving a lens and adjusting a diaphragm by a driving force supplied by a single drive source, comprising: a transmission mechanism capable of taking a first transmitting condition by which the driving force is transmitted for both adjusting the diaphragm and moving the lens; and a second transmitting condition by which the driving force is transmitted for either adjusting the diaphragm or moving the lens. Both the lens and the diaphragm are driven while the drive source is supplying the driving force to the transmission mechanism taking the first transmitting condition, and either the lens or the diaphragm is driven while the drive source is supplying the driving force to the transmission mechanism taking the second transmitting condition.

Abstract: A photo diode and a resistor are connected to each other in series. A gate of a FET is connected to the connection of the photo diode and the resistor. When a photometry switch is turned on, the photo diode generates a photo current according to a subject brightness. A potential difference is generated between the both terminal of the resistor. When the subject brightness is less than a threshold level, the FET is not turned on because of low potential difference of the resistor. When a subject brightness is equal to or more than the threshold level, the FET is turned on because of high potential difference of the resistor. A first transistor turned to be in a state opposite to the FET and a second transistor turned on and off according the state of the first transistor are provided. When the FET is turned off, the second transistor is turned on, and a solenoid is powered. The solenoid moves a stop plate out of an optical axis such that an exposure is taken through a large stop opening.

Abstract: A camera body cap with a hole in line with which is fitted with a lens designed with the iris on the subject side of the lens. If provided with an adjustable iris, then a front cover shell may be included to act as a dust cover for the iris disc and a cut out window to show the f number detail of the iris selected.

Abstract: A cylindrical, electrical insulating region is formed in a circuit substrate made of a semiconductor substrate to continuously extend from the upper surface to the lower surface of the semiconductor substrate and be closed in a plane parallel to the surface of the semiconductor substrate. The electrical insulating region is formed by an insulating region made of a heat-resistant insulating material. The insulating region is formed by forming a through hole or trench in the circuit substrate and forming an oxide film or nitride film on the wall surface of the hole or trench or filling it with an insulating material. When the trench is formed, the substrate is thinned by polishing or the like until the trench appears on the upper and lower surfaces of the substrate after the insulating region is formed. The region surrounded by the insulating region functions as an electrode when the conductivity of the region is increased by diffusing an impurity in it.

Abstract: A fixed making frame for blocking the peripheral light is disposed between a taking lens aperture and an exposure frame of a film surface. The effective diameter of the taking lens aperture is variable so as to make an angular field of a photogtaphing light which extends from the taking lens aperture to an exposure area. The angular filed is smaller under a larger effective diameter than under a smaller effective diameter. A predetermined width of a periphery of the exposure area defines a non-print area, and the fixed making frame is disposed at a side adjacent to the taking lens aperture with respect to an intersection of the peripheral light which extends between an inner periphery of the non-print area and the lens aperture under a larger effective diameter of the taking lens, and a peripheral exposure light which extends the lens aperture and an outer periphery of the exposure area, under a smaller effective diameter of the taking lens aperture.

Abstract: In order to realize a lens barrel or camera which is light in weight and small in size and which has performance as high as a single-focus lens, a photographing optical system employed in the lens barrel or camera has four lens groups, and at least two diaphragms are arranged at different positions. Despite the simple structure it has, the photographing optical system enables switching among a number of focal lengths. The diaphragms include: a first diaphragm (diaphragm unit A) arranged at a first inter-lens position defined inside the photographing optical system and controlling the amount of light passing through the system; and a second diaphragm (diaphragm unit B) arranged at a second inter-lens position defined inside the system and controlling the amount of light passing through the system.

Abstract: A simplified camera mechanism and method for allowing an operator to select distinct ones of several apertures by actuation of a finger engageable aperture selector as well as insure return of the selector to an initial mode position as a shutter actuator assembly returns to its original unactuated position following release thereof by the operator.

Abstract: A macro lens system includes a positive first lens group, an aperture and a negative second lens group arranged in the order from an object side. The lens groups are driven to move along an optical axis for focusing. When the lens groups are driven, a full-opening diameter of the aperture is changed such when the lens groups is moved toward the object side to focus on a closer object, the full-opening diameter is increased.

Abstract: A quantity-of-light adjusting device includes a drive source, a base member having an opening formed therein, and a blade arranged to move by being driven by the drive source and having three openings formed therein side by side in a row in a moving direction of the blade, wherein, among the three openings formed in the blade, the opening situated in the middle of the row is larger than the opening formed in the base member.

Abstract: An iris apparatus includes a transparent elastic member which is provided on an optical axis including a convex surface, the apex thereof being located on the optical axis; a transparent plate which is opposed to the convex surface of the transparent elastic member in the optical axis direction; an elastic tube which defines a space between the convex surface of the transparent elastic member and the transparent plate; light intercepting liquid which is contained within the space; and an actuator that relatively moves the transparent elastic member and the transparent plate in the optical axis direction.

Abstract: In a wide range focusing camera, a cooperating engagement members are provided in moveable parts of a focusing mechanism and an aperture opening selecting mechanism so as to force the latter into selecting a smaller one of the aperture opening areas when the focusing mechanism is actuated into moving the lens to the position suitable for a close range shot. At the same time, a strobe light is enabled. Thus, the focal depth can be increased, and a clear picture of a close range object can be taken without regard to the condition under which the object is placed in relation with the surrounding objects. Also, a three-dimensional object having a depth can be photographed at close range with a satisfactory result. Because a number of settings required for such close-up shots are instantaneously set either manually by hand or automatically by an auto-focusing mechanism, it is possible even for an inexperienced photographer to take clear pictures of objects at close range.

Abstract: An aperture selection mechanism for camera lens includes an aperture strip and a disk selection knob. The aperture strip has two or more different sizes of apertures equally spaced from each other and being sequenced by size. Turning the selection knob, the aperture strip will be moved and one of the apertures will be positioned in the light path of the camera lens. Two or more apertures may be moved to the light path of camera lens one at a time so that the camera can produce better quality of photo and image. The structure is simple, low cost and easy to use.

Abstract: In an exposing aperture device having a pair of exposing diaphragms which are moved in opposite directions while being guided by guide members formed on a base plate, the guide members are each formed of a vertical rising part with a first contact protrusion coming into point contact with the diaphragms and a horizontal ledge part with a second contact protrusion being in point contact with the diaphragms. By projecting the first and second contact protrusions more than burrs which are inevitably left on the rising part and ledge part as the result of forming the base plate by a punching process or a resin molding process, the exposing diaphragms can be moved smoothly and stably to control exposure with a high accuracy without being affected by the burrs.