WO2004049058A1 - 光学ユニット及びその光学ユニットを備えた撮像装置 - Google Patents
光学ユニット及びその光学ユニットを備えた撮像装置 Download PDFInfo
- Publication number
- WO2004049058A1 WO2004049058A1 PCT/JP2003/013642 JP0313642W WO2004049058A1 WO 2004049058 A1 WO2004049058 A1 WO 2004049058A1 JP 0313642 W JP0313642 W JP 0313642W WO 2004049058 A1 WO2004049058 A1 WO 2004049058A1
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- WO
- WIPO (PCT)
- Prior art keywords
- optical
- filter
- lens
- optical axis
- lens barrel
- Prior art date
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/026—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using retaining rings or springs
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
- G02B7/102—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens controlled by a microcomputer
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/54—Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
Definitions
- the present invention relates to an image pickup apparatus such as a collapsible optical unit capable of moving an optical system between a use position and a storage position, and a digital still camera and a digital video camera provided with the optical unit.
- the optical filter retracts in the direction intersecting the optical axis when the optical lens is retracted.
- the optical filter is forcibly retracted from the optical axis to the outside of the optical axis when there is an abnormality in which the retracting mechanism does not operate at the time of retraction of the optical lens, and the optical switch is provided.
- a solid-state imaging device such as a CCD or a CMOS receives an image of an object formed by the optical system lens barrel and receives the image. Light is photoelectrically converted and output as an electrical signal, and digital data corresponding to the image of the subject is generated.
- solid-state imaging devices such as CCDs and CMOS have geometric patterns (hair, stripes, tiles, etc.) smaller than the periodic array of imaging devices in order to perform geometrically discrete sampling.
- geometric patterns hair, stripes, tiles, etc.
- solid-state imaging devices such as CCD and CMOS generally have high sensitivity not only to visible light but also to the infrared region, so correct color reproduction can not be performed unless unnecessary infrared regions are blocked.
- an infrared range power filter is used, and the infrared range cut filter draws not only the infrared range but also a gentle absorption curve from a range to the red, and color reproduction in the long wavelength range It also plays a role in In this infrared cut filter, in addition to the absorption type using glass or plastic, there is also a type that reflects infrared light by multi-coating and cuts transmitted light.
- an infrared cut filter is used to pursue high color reproducibility as described above in a general digital stinole camera, digital video camera, etc. Reference 2).
- This infrared filter is designed to be placed in the light path and removed from the light path.
- the infrared ray By irradiating the subject with infrared light, it is possible to use a flash such as a brush even in an extremely dark environment that can not be captured with a conventional digital still camera or digital video camera. You can also shoot without using a light emitting device such as a device or a lighting device ("Night Shot Function").
- the infrared cut filter is moved in and out of the optical axis of the lens in synchronization with focusing.
- a function (“Night framing function") has been developed that enables both the fading in the dark and the image recording in natural colors.
- the cut filter is put back on the optical axis to perform pintling, and a flash is emitted at the time of shooting (recording) to perform shooting with natural color reproduction.
- FIG. 9 is an external perspective view of a retractable lens, for example, when the digital still camera is not in use, in a lens storage state, that is, in a retracted state in which the lens barrel is contracted.
- Figure 10 shows the camera used with the lens barrel extended, and is an external perspective view of the wide (wide-angle) state or the tele (far away) state.
- Fig. 1 1 A, Fig. 1 IB and Fig. 1 1 C show the appearance of the retractable lens of the optical unit.
- Fig. 1 1 A shows the collapsed state
- Fig. 1 1 B shows the wide state
- Fig. 11 C is a perspective view showing the tele state.
- FIG. 12 A, Fig. 12 B and Fig. 12 C show a conventional optical lens retractable lens
- Fig. 12 A shows the lens storage position when not in use
- Fig. 12 B is a cross-sectional view showing the wide (wide-angle) position
- Fig. 12 C is a tele (telephoto) position.
- FIG. 13 is an exploded perspective view of the collapsible lens shown in FIG.
- Reference numeral 1 denotes a camera body portion of the digital still camera
- reference numeral 2 denotes a collapsible imaging lens portion provided on the front of one side of the camera body portion 1. In the retracted state shown in FIG.
- the front lens surface of the imaging lens unit 2 is protected by Palia 3.
- a finder lens 4 On the front side of the camera body 1, a finder lens 4, a stropo 5, and an auto focus light receiving unit 6 for detecting a distance to an object are disposed.
- Reference numeral 7 is a finder window, 8 is a shirt tapotan, and 9 is a mode switching knob.
- the imaging lens unit 2 is a collapsible optical unit.
- the detailed configuration of will be described.
- the retractable optical unit shown in Fig. 1 2 A to Fig. 1 2 C is of a type that can not be photographed at night (with no night shot function).
- Reference numeral 10 denotes a first-group lens frame holding a plurality of lenses 11.
- First group lens frame 10 is a plurality of cam pins fitted in first cam grooves 12a of a cam ring 12. It has 0 a.
- the first group lens frame 10 is formed of, for example, a black polycarbonate resin containing glass fibers, and has strength and light shielding properties.
- Reference numeral 13 denotes a second group lens frame holding a plurality of lenses 13a, and a second group lens frame 13 is a plurality of cam pins fitted in the second cam grooves 12b of the cam ring 12. It has 1 3 b.
- the second group lens frame 13 is formed of, for example, a black polycarbonate resin containing glass fibers, and has strength and light shielding properties.
- an iris shutter mechanism may be configured in the second lens group frame 13.
- the cam ring 12 described above includes a gear portion 1 2 c for rotationally driving within the inner diameter of the fixed ring 1 5 by the gear 1 4 a of the gear unit 1 4 and a cam groove 1 5 a of the fixed ring 15. Equipped with multiple cam pins 1 2 d fitted to ing.
- the cam ring 12 is formed of, for example, a black polycarbonate resin containing glass fibers, and has strength and light shielding properties.
- the first force groove 1 2 a and the second cam groove 1 2 b of the force ring 12 have an optical axis along a predetermined carp of the first lens frame 10 and the second lens frame 13.
- a sliding operation to move in the L direction is performed.
- Reference numeral 1 6 is a rectilinear guide ring, and the fixed ring 1 integrally with the cam ring 1 2
- This straight guide ring 1 It is a member that moves in the direction of the optical axis L inside 5. This straight guide ring 1
- the 6 includes a plurality of guide grooves for guiding the first lens unit frame 10 in the optical axis direction.
- a linear guide ring 16 having a plurality of guide grooves 16 b for guiding the second lens unit frame 13 in the direction of the optical axis 16 a is, for example, a black containing glass fiber. It is molded of polycarbonate resin and has strength and light blocking properties.
- the fixed ring 15 is a member fixed to the rear barrel 17 o
- the fixed ring 15 is formed of, for example, a black plastic resin containing glass fiber, and its strength and weight are fixed. It has a light shielding property.
- the code 1 8 is a 3 group lens frame holding the lens 1 9. This
- the third group lens frame 18 is formed of, for example, a black polycarbonate resin containing a double glass fiber, and has strength and a light shielding property. This
- the third group lens frame 1 8 is held movably in the optical axis direction with respect to the rear barrel 17 and is slightly displaced in the optical axis direction by a power source such as a stepping motor (not shown). It has become.
- a fixed ring 15, a variator drive mechanism 20 and a gear unit 14 are fixed to the rear barrel 17.
- the rear lens barrel 17 is provided with an optical filter 22 comprising an optical low-pass cut filter and an infrared light filter, and a seal rubber 2 with a holding portion 21 facing the third lens unit frame 18.
- a solid-state imaging device 24 such as a CCD or CMOS is positioned and fixed to the rear barrel 17 behind an optical filter 2 2.
- the rear driving mechanism 20 is a projecting member for closing and driving the rear 3 in conjunction with retraction of the imaging lens unit 2.
- the gear unit 14 rotatably drives the cam ring 12 via a gear portion 14a which is in mesh with the gear 12c, and the gear ratio is in the retracted state, the wide state, the tele state. And, it is decided to obtain sufficient driving force in the range of 'tele-state', wide state and collapsed state.
- the first lens frame 10 has its cam pin 10 a along the first cam groove 12 a of the cam ring 12 and the guide groove 16 a of the rectilinear guide ring 16 in the direction of the arrow B Moving.
- the cam pins 13 of the second lens group frame 13 move in the direction of the arrow C along the second cam groove 12b of the cam ring 12 and the guide groove 16b of the rectilinear guide ring 16. Do.
- the first lens unit frame 10 and the second lens unit frame 13 become optically in the wide position.
- the cam ring 12 is driven by the gear unit 14.
- the cam pin 12 d is a cam groove 15 Since the cam ring 12 does not move in the optical axis direction by moving the horizontal cam groove 15 of a, the rectilinear guide ring 1 6 also does not move in the optical axis direction as shown by the arrow D.
- the first lens frame 10 has its cam pin 10 a arrow along the cam groove 12 a of the cam ring 12 and the guide groove 16 a of the rectilinear guide ring 16. Mark Move in the E direction.
- the cam pins 13 of the second lens group frame 13 move in the direction of arrow F along the cam grooves 12b of the cam ring 12 and the guide grooves 16b of the rectilinear guide ring 16.
- the first lens frame 10, the second lens frame 13 and the third lens frame 13 perform the zooming operation by optically moving between the guide position and the tele position (arrow G direction).
- the third group lens frame 1 is driven by a driving source (not shown) such as a stepping motor, etc. which is not shown.
- a driving source such as a stepping motor, etc. which is not shown.
- the thickness of the optical filter itself such as the optical low-pass cutter or infrared region and the thickness of the insertion / fixed portion of the optical filter
- the range in which the third group lens frame 18 can move in the direction of the solid-state imaging device 24 such as a CCD or CMOS is restricted.
- the optical filter 2 2 has an infrared cut filter with an optical opening. It is used as an optical filter in a state of being stuck to a single pass filter and fixed to the rear barrel 17. As a result, the infrared cut filter can not be moved in and out of the optical axis, and therefore nighttime photography could not be performed.
- the detailed configuration of the collapsible lens (imaging lens unit) 70 which is a collapsible optical unit according to the prior art of the lens function mounting type) will be described.
- This night shooting is a technology that can be achieved by moving the infrared cut filter on and off the optical axis.
- the configuration of the entire optical unit is the same as that of the above-mentioned type (Night-shot function-less type) retractable optical unit 2 (see Figs. 12A to 12C) which can not be photographed at night. Therefore, the same reference numerals are given to the same parts and their explanations are omitted, and different parts will be explained.
- the rear barrel 17 A is provided with a casing 7 1 having a substantially rectangular parallelepiped shape substantially at the center of the surface opposite to the fixed ring 15. It is done.
- an optical filter in this embodiment, an infrared cut filter 9 1
- a filter storage unit 72 is provided for placing the In the front of the casing 7 1 corresponding to the filter housing 7 2, the incident light beam from the objective side is held by the rear barrel 17 A.
- a solid-state imaging device 2 such as a CCD or CMOS.
- an evacuation port for retracting the infrared cut out filter 91 which is an example of the optical filter stored in the filter housing 72, in the direction orthogonal to the optical axis L. 7 4 provided It is done.
- the evacuation port 74 On both sides of the evacuation port 74, when the infrared cut filter 91 receives power and moves, a pair is provided to appropriately guide the infrared cut filter 91 in the direction orthogonal to the optical axis. Guides 7 5 and 7 5 are provided.
- a power source mounting portion 7 7 to which a power source 7 6 for generating a power for moving the infrared cut filter 9 1 is attached is provided at an oblique upper portion of one surface of the rear barrel 17 A There is.
- a stepping motor can be applied as the power source 7 6, and a flange portion for attaching to the power source mounting portion 7 7 on the side where the rotary shaft 7 6 a protrudes can be applied. 6 b is provided.
- the power source 76 is attached to the rear barrel 17 A by fixing the flange portion 7 6 b to the power source attachment 7 7 with fixing means such as mounting screws. At this time, the rotation shaft 7 6 a is inserted into the bearing hole 7 7 a o
- a rotation pin 7 8 is integrally provided on the rotation shaft 7 6 a of the power source 7 6 via an arm portion 7 8 a.
- the pivot pins 78 are displaced parallel to each other by a predetermined distance from the rotation shaft 7 6 a by the arm portion 7 8 a.
- a fan-shaped gear 79 provided with a gear portion 79a at a part of the outer peripheral edge is attached to the tip of the rotary shaft 76a.
- the central part of the gear 7 9 has a rotation shaft 7 6 a and a pivot pin 7
- An engagement hole 7 9 into which 8 is inserted is provided.
- the sector gear 7 9 is integrally rotationally driven by the rotation of the rotation shaft 76a. .
- a pinion gear 80 rotatably supported on a pivot 7 c provided on a flange portion 7 6 b is engaged with the gear portion 7 9 a of the sector gear 7 9.
- An arm portion 80 a is provided on a part of the outer periphery of the pinion gear 80, and a drive pin 8 1 protruding to the power source 76 side is attached to the arm portion 80 a.
- a power transmission mechanism 8 3 for moving the filter holder 8 2 is configured by the motion pin 7 8, the sector gear 7 9, the pin on gear 8 0 and the drive pin 8 1 ⁇
- 0 Power transmission mechanism 8 3 is not limited to the above-described gear train or the like, and, for example, a cam mechanism, a link mechanism, or any other mechanism capable of transmitting power can be used.
- the infrared filter 8 2 is for holding the infrared cut filter 9 1 and moving it in the direction orthogonal to the optical axis L.
- a holding portion 8 2 a that is opened in the shape of a letter to which 1 is attached is provided.
- Protrusions 82b are provided on both outer surfaces on the opening side of the holding portion 82a for locking the mounting band 84 closing the opening.
- an elongated hole 8 2 c is provided in which the drive pin 8 1 is slidably engaged.
- ⁇ -It can be molded using polycarbonate resin, and has strength, light shielding property and mass productivity ⁇ o
- the mounting pad 84 is formed of an elastic member such as a rubber-like flexible body, and is provided with a pair of engagement holes 8 4 a engaged with the protrusions 8 2 b.
- the mounting band 84 is provided with a biasing portion 84 b that elastically biases the infrared range clutch 91 at the time of mounting to prevent it from falling off. This mounting band 8 4 is used to hold the holding portion 8 2 a in the infrared range power filter 9
- the filter 9 1 is positioned at the predetermined position and held by the filter holder 8 2.
- the holding method of the infrared cut filter 91 is not limited to the snap fitting method by the mounting band 84, but it is possible to use a thermal adhesive method, an adhesive method, and various other methods. It is possible.
- the infrared range power filter 9 1 is held by the filter holder 82 and moved in a direction orthogonal to the optical axis L.
- It is formed separately as a separate member from the optical ⁇ one-pass force filter 8 5 o
- the optical mouth—pass power filter 85 is necessary to record the image of the imaging device even during night-time imaging such as infrared imaging. Therefore, in this embodiment, it is disposed on the front side in the optical axis direction of the solid-state imaging device 2 4 mounted in the central hole of the rear barrel 17 A, positioned and fixed at a predetermined position, and o
- a moving mechanism 86 configured to move the infrared cut filter 91 between the position on the optical axis and the position outside the optical axis is configured by the above-described power transmission mechanism 8 3 and the finore holder 8 2. There is. Then, a retracting mechanism for moving the infrared range filter 9 1 linearly from the predetermined position on the optical axis in the orthogonal direction by the moving mechanism 8 6 and the casing 7 1 to retract the filter to the predetermined position off the optical axis 8 Eight are configured Les, «.
- the operation of the retraction mechanism 8 8 will be briefly described as follows. First, the case where the infrared cut filter 91 is moved from the position on the optical axis to the position off the optical axis will be described.
- the drive source 7 6 is driven to rotate the rotation shaft 7 6 a and the pivot pin 7 8 in a predetermined rotation direction.
- the sector gear 79 integrated with the rotation shafts 7 6 a and so on in the rotation direction is rotated by the same amount in the same direction.
- the rotation of the sector gear 7 9 causes the pinion gear 80 combined with the gear portion 7 9 a to rotate in the opposite direction by the number of teeth engaged with each other. Be rolled.
- the drive pin 8 1 is rotated around the pivot 7 c to move the filter holder 8 2 in the filter housing 7 2 while the drive pin 8 1 moves along the elongated hole 8 2 c. Move in the direction of pulling out from the.
- the filter holder 82 is guided by the guide portion 7 5 and moves in the direction orthogonal to the optical axis direction.
- the infrared cut filter 9 1 held by the filter holder 8 2 is linearly moved in the orthogonal direction from the predetermined position on the optical axis to move to the predetermined position off the optical axis.
- the infrared cut filter 91 when the infrared cut filter 91 is moved from a predetermined position off the optical axis to a predetermined position on the optical axis, the reverse operation to the above-described retraction operation is performed. Thus, the infrared cut filter 91 can be moved to a predetermined position on the optical axis.
- the rear end of the fixed ring 15 abuts on the front of the rear barrel 17 A on which such an infrared cut filter 91 or the like is mounted, and is fixed by a fixing means such as a mounting screw. Integrated. Therefore, as shown in FIG. 17, a plurality of screw receiving portions 15 c through which mounting screws are inserted are provided at the rear end portion of the fixing ring 15, and these screw receiving portions 1 5
- the rear barrel 17 A is provided with the same number of recesses 17 a corresponding to c.
- the fixing ring 15 is positioned with respect to the rear barrel 17 A by fitting each screw receiving portion 15 c to the recess 17 a. By screwing in that state, the fixed ring 15 is tightened and integrated with the rear barrel 17 A.
- this collapsible lens 70 can execute the “night shot function” and the “night framing function” described above. That is, when used as an optical lens from the retracted state shown in FIG. 14 A to the wide state shown in FIG. 14 B to the tele state shown in FIG. 14 C, the infrared cut filter 9 By taking 1 into and out of the optical axis, you can Shooting and night shooting.
- Fig. 15 A and Fig. 15 B illustrate the operation of inserting and removing the infrared area power filter 9 1 of the retractable lens 70.
- Fig. 15 A shows red at a predetermined position on the optical axis.
- Fig. 15B shows the state where the external area cut filter 91 is set, and Fig. 15B shows the state where it is completely moved from the optical axis to the outside of the optical axis.
- the symbol H indicates the moving direction of the infrared cut filter 91.
- Patent Document 1 describes an optical device such as a camera capable of moving an optical system to a use position and a storage position.
- the optical device of the present invention includes a first lens unit that constitutes an optical system, a first motor that drives the first lens unit, and a first lens unit that constitutes the optical system. The first thing to be done after
- the 2nd lens set In response to a storage instruction of 2 motors and 5 self-learning systems, the 2nd lens set is retracted, and after the 2nd lens set is unrolled, the 1st lens set is restored.
- the first motor l and the second motor It is characterized in that it has means for controlling
- Patent Document 2 describes an imaging device having an imaging element capable of imaging a visible light region and an infrared light region.
- This image pickup apparatus is an image pickup apparatus having an image pickup element capable of picking up an image in a visible light region and an infrared light region, and is an infrared light chip which can be disposed in the light path and removed from the light path.
- Ruta and the above imaging A signal processing means for processing the image signal obtained from the element, a detection means for detecting the brightness when the image signal is photographed, and a judgment as to whether the operation is an error based on the detection result of the detection means It is characterized by comprising control means for informing the user of the above-mentioned operation error.
- Patent Document 1
- Patent Document 1 Japanese Patent Application Laid-Open No. 2000-0-1964 (Pages 3-5, Figure 1, etc.)
- Patent Document 2 Japanese Patent Application Laid-Open No. 2000-0-1964 (Pages 3-5, Figure 1, etc.)
- the “Night Shot function is installed.
- the night shot function is installed in the nighttime retractable lens which can be taken at night, in order to increase the insertion and removal mechanism of the infrared cut filter.
- the total lens length at the time of retraction is increased compared to the case where the lens can not be photographed at night.
- FIG. 4A is a "collapsible lens without night shot function (hereinafter referred to as” X type ”)
- Fig. 4B is a "prior art having a night shadow function”.
- a collapsible lens hereinafter referred to as “Y-type”
- FIG. 4C show a “collapsed lens according to the present invention having a night shot function (hereinafter referred to as“ Z-type ”)”.
- the present invention has been made to solve the problems as described above, and an optical unit and an imaging having the optical unit capable of realizing further thinning of the retractable lens.
- the purpose is to provide equipment.
- the retracting mechanism for forcing the user 1 to perform the retraction operation or retracting the optical filter from the optical axis to the outside of the optical axis during the retracting operation of the retractable lens.
- the objective is to solve the above-mentioned problems by providing a mechanism for forcibly retracting the optical filter from on the optical axis to the outside of the optical axis when an abnormality or the like that does not operate occurs. It is said that. Disclosure of the invention
- the optical unit of the present application comprises: a fixed barrel; at least one lens barrel movable along the optical axis direction with respect to the fixed barrel; In a collapsible optical joint provided with a lens and an optical filter interposed between the barrel and the lens barrel, the optical barrel is brought into contact with the optical filter when the lens barrel is retracted.
- the lens can be stored at a position on the optical axis after the optical filter has moved. It is characterized by
- the optical unit of the present application includes a fixed barrel, at least one lens barrel movable along the optical axis direction with respect to the fixed barrel, a fixed barrel and a lens barrel, and
- a collapsible optical unit having a lens and an optical filter interposed between the lens unit and the lens unit, the optical filter is moved in a direction intersecting the optical axis when the lens barrel approaches the optical filter.
- a retracting mechanism for retracting out of the optical axis and a forcible retraction mechanism for forcibly retracting the optical filter from on the optical axis when the optical filter can not be retracted from the optical axis are characterized. It is said that.
- the imaging apparatus provided with the optical unit of the present application includes at least a fixed barrel and at least one movable in the optical axis direction with respect to the fixed barrel.
- One lens barrel a lens interposed between the fixed barrel and the lens barrel and an optical filter / retractor, and the lens barrel approaching the optical filter.
- the optical file intersects the optical axis. It has a retractable optical unit that is provided with a retracting mechanism that moves in the direction to retract out of the optical axis.
- a digital still camera whose lens can be stored at a position on the optical axis after the optical filter has moved, and a camera device such as a digital camera, a digital camera, etc.
- the imaging device provided with the optical unit of the present application includes at least a fixed barrel and at least one movable along the optical axis direction with respect to the fixed barrel.
- the optical filter intersects the optical axis If the optical filter can not be retracted from the optical axis by the retracting mechanism that moves the optical filter in the moving direction and retracts the optical filter off the optical axis, It is characterized by being a camera apparatus such as a digital still camera or digital camera equipped with a retractable optical unit provided with a forced retraction mechanism for forcibly retracting and a retractable optical unit.
- the optical unit of the present application when the lens barrel is retracted, a space of a predetermined size is formed at the position on the optical axis after being moved by retracting the optical film in the direction intersecting the optical axis.
- the lens of the lens barrel is inserted into the space.
- the optical filter can be moved, and the lens can be stored in the empty position, thereby enabling thinning of the entire length of the optical lens's collapsed lens, and downsizing of the optical lens.
- the forced retraction mechanism causes the optical filter to be on the optical axis in the case of a forced retraction operation by the user or an abnormality of the retraction mechanism at the time of retraction. It is possible to forcibly retract it from the optical axis, and the optical filter in the infrared range, such as an optical filter and its holding member, its drive mechanism, or the drive mechanism of the collapsible lens itself such as a cam ring is structurally broken. It is possible to prevent being done.
- FIG. 1A is a cross-sectional view showing a retracted state, which is a lens storage state when the retractable lens of the first embodiment according to the optical unit of the present invention is not used.
- FIG. 1B is a cross-sectional view showing the wide-angle state of the retractable lens of the embodiment of the optical unit according to the present invention o
- FIG. 1C is a cross-sectional view showing the tele (telephoto) state of the retractable lens of the first embodiment according to the optical unit of the present invention o
- Fig. 2 is an enlarged cross sectional view of Fig. 1A.
- FIG. 3A is a cross-sectional view showing a state where the infrared cut filter is inserted and removed according to the first embodiment of the optical unit of the present invention, and showing a state where it is positioned on the optical axis.
- FIG. 3B is a cross-sectional view showing the state of movement out of the optical axis, for explaining the in-out operation of the infrared cut filter in the first embodiment of the optical unit according to the present invention.
- Fig. 4A is a cross-sectional view showing a conventional optical lens collapsible lens without night shot function.
- Figure 4B is a cross-sectional view of a prior art optical lens collapsible lens with nightshot capability o
- FIG. 4C is a cross-sectional view of the first embodiment of the non-inventive optical unit with a night shot function of the collapsible lens o
- FIG. 5A is a cross-sectional view showing a retracted state in which the lens is stored when the retractable lens of the second embodiment according to the optical unit of the present invention is not used.
- FIG. 5B is a cross-sectional view showing a wide (wide angle) state of the retractable lens of the second embodiment according to the optical unit of the present invention.
- FIG. 5C is a cross-sectional view showing the tele (telephoto) state of the retractable lens of the second embodiment according to the optical unit of the present invention.
- FIG. 6A shows the infrared range of the second embodiment of the optical unit of the present invention.
- FIG. 7 is a cross-sectional view showing a state of positioning on an optical axis, for explaining an operation of inserting and removing a cut filter.
- FIG. 6B is a cross-sectional view showing the movement of the infrared cut filter in the second embodiment according to the optical unit of the present invention in a state of being moved out of the optical axis.
- FIG. 7 is a side view showing a second lens unit frame and a rear lens barrel of a retractable lens according to a second embodiment of the optical unit of the present invention o
- FIG. 8 is a perspective view showing a second lens unit frame and a rear lens barrel of a retractable lens according to a second embodiment of the optical unit of the present invention o
- Fig. 9 is an external perspective view of an embodiment of the digital still camera in which the collapsible lens of the optical unit is in the retracted state o
- FIG. 10 is an external perspective view of an embodiment of the digital stinole camera according to the present invention, in which an optical lens collapsible lens is extended in a retard or tele state.
- Fig. 1 1 A is an external perspective view showing the collapsed state of the optical unit collapsible lens.
- Fig. 1 1 B is an external perspective view showing the wide state of the optical unit collapsible lens.
- Fig. 1 1 C is an external perspective view showing the tele state of the optical unit collapsible lens.
- Fig. 12 A is a cross-sectional view showing the retracted state of the conventional retractable lens without night shot function.
- Fig. 12 B is a cross-sectional view showing the wide state of a conventional collapsible lens without a night shot function.
- FIG. 12C is a cross-sectional view showing a telescopic state of a conventional retractable lens without night shot function.
- Figure 13 is an exploded perspective view of the conventional collapsible lens shown in Figure 12
- C Oh. 14 A is a cross-sectional view showing a collapsed state of a collapsible lens having a night shot function according to the prior art.
- Fig. 14 B is a cross-sectional view showing the wide state of a prior art retractable retractable lens according to the prior art.
- FIG. 14C is a cross-sectional view showing a telescopic state of a collapsible lens having a night shot function according to the prior art.
- Fig. 15A is a diagram for explaining the operation of inserting and removing the infrared cut filter of the collapsible lens according to the prior art shown in Fig. 14 according to the prior art shown in Fig. 14. It is a figure.
- Fig. 15 B is a diagram for explaining the operation of the infrared range power filter of the collapsible lens according to the prior art shown in Fig. 14 according to the prior art shown in Fig. 14.
- FIG. 15 B is a diagram for explaining the operation of the infrared range power filter of the collapsible lens according to the prior art shown in Fig. 14 according to the prior art shown in Fig. 14.
- FIG. 15 B is a diagram for explaining the operation of the infrared range power filter of the collapsible lens according to the prior art shown in Fig. 14 according to the prior art shown in Fig. 14.
- FIG. 16 is an exploded perspective view of the retracting mechanism of the infrared range power filter of the collapsible lens according to the prior art shown in FIG.
- Fig. 17 is a perspective view of the retracting mechanism of the telescopic lens having a night shot function according to the prior art shown in Fig. 14 and is a perspective view of the retracting mechanism of the infrared range filter and the like viewed from the rear side. Best form to implement
- FIG. 1A, Fig. 1B and Fig. 1C are sectional views of the first embodiment of the collapsible lens according to the present application, and Fig. 1A is a retracted position in which the lens is stored when not in use. B shows the wide (wide-angle) position, and Fig. 1 C shows the tele (far-away) position.
- FIG. 2 is an enlarged cross-sectional view of FIG. 1A.
- FIGS. 3A and 3B are cross-sectional views for explaining the insertion and removal operation of the infrared filter.
- the first group lens frame 10 holding a plurality of lenses 1 1 and the second group lens frame 13 holding a plurality of lenses 1 3 a are rotated by the cam ring 12 as shown in FIG.
- the movement from the retracted position of A to the wide position of Fig. 1B and the wide position of Fig. 1B to the tele position of Fig. 1C is the same as each other. , It is the same as the case described in Fig. 10 A, Fig. 1 OB and Fig. 10 C.
- an optical filter including an optical low pass cut filter, an infrared cut filter, etc. is retracted in a direction orthogonal to the optical axis L.
- the optical filter retracting mechanism 8 8 will be described below with reference to FIGS. 1A to 1C, 2 and 3A and 3B.
- FIGS. 1A to 1C, 2 and 3A, and 3B the above-described FIGS. 4A to 4C, 12A to 12C, 13 and 14A are described.
- the same components as those described in FIGS. 14 C, 15 A, and 15 B will be assigned the same reference numerals.
- the collapsible lens (imaging lens unit) 90 according to the first embodiment has the entire body configuration that can be acquired at night, as described with reference to FIGS. 14A to 14C. Since it is almost the same as the collapsible lens of the “with shot function”, here we will outline the overall configuration and explain in detail the differences.
- reference numeral 10 denotes a first-group lens frame that holds a plurality of lenses 1
- reference numeral 12 denotes a cam that movably supports the first-group lens frame 10 in the optical axis direction. It is a ring.
- 13 is a two-group lens frame that holds a plurality of lenses 13 a
- 16 is a rectilinear guide ring that movably supports the two-group lens frame 13 in the optical axis direction.
- 1 A fixed ring 5 movably supports the cam ring 12 in the optical axis direction.
- the fixed ring 15 is integrally fixed to the front of the rear barrel 17 B.
- an optical low-pass cut filter 8 5 and a solid-state image sensor 24 are held, and a seal rubber 2 3 is interposed between the two.
- an infrared cut filter 91 which is a specific example of the optical filter, is disposed so as to be linearly movable between the optical axis L and the off-optical axis. ing. Furthermore, in front of the infrared cut filter 91 on the optical axis
- a lens 19 which is held by a third group lens frame 18 B is disposed.
- the configuration of the third group lens frame 18 B is the same as that of the third group lens frame 18 described above, but it is miniaturized in the radial direction as long as the optical performance is not adversely affected. It is preferable that the filter 9 1 and filter holder 8 2 be shaped so as to easily retract in the direction orthogonal to the optical axis L. In this case, it is also effective to provide a notched notch in the third lens group frame 18 to avoid the filter holder 8 2 retracted in the direction orthogonal to the optical axis L.
- the rear barrel 1 7 B is the same as the rear barrel 1 7 3 with the top 3 ⁇ 4 top 3 but with the filter holder 82 retracted at right angles to the optical axis L and the third lens frame 1 8 B
- the filter holder 82 retracted at right angles to the optical axis L and the third lens frame 1 8 B
- the clearance of the retraction port 74 is made larger than in the prior art.
- the opening 7 3 is made larger than in the conventional case.
- this opening 73 usually has a function as a fixed diaphragm in some cases, this function is another opening (for example, an optical low-speed filter, a skirt filter 8 5 is fixed) Part) so that opening part 7 3 can not be enlarged. Totally possible.
- the infrared cut filter 91 When used as an optical lens from the retracted state in FIG. 1A to the wide state in FIG. 1B through the wide state in FIG. 1B, the infrared cut filter 91 is the optical axis L. By taking it in and out, it is possible to have an infrared function and perform infrared photography (see Fig. 3 A, Fig. 3 B).
- the power from the power source 76 is applied to the filter holder 82 (arrow H), as shown in FIG. 1A, via the filter holder 82.
- the infrared region filter 91 can be retracted in the direction orthogonal to the optical axis L.
- the third group lens frame 18 B is housed in a space where the infrared cut filter 91 is retracted in the direction orthogonal to the optical axis L (arrow 1).
- the third lens unit frame 18 B is stored at a deeper position than in the conventional case, and the lens 19 is stored thinner.
- the third group lens frame 18 B is stored thinner than in the conventional case, the first group lens frame 10, the second group lens frame 13, and the linear guide along the predetermined cam curve in the vacant space.
- the rings 16 can be stacked and stored (arrow A, arrow B and arrow C).
- Figs. 4A to 4C comparing the relationship between the three types, the X type collapsible lens (Fig. 4A) and the Y type collapsible lens (Fig. 4B) are compared. Also, it can be seen that the total length of the Y-type retractable lens is increased by the thickness T 1 of the retraction mechanism 8 8. On the other hand, comparing the Y-type retractable lens with the Z-type retractable lens (Fig. 4C), the total length of the Z-type retractable lens is thinner by T2 despite the use of an infrared cut filter. It is understood that it has become.
- the total length of the Z-type collapsible lens is thinner by thickness T 3 despite the addition of the infrared cut filter 22. Natsu ing.
- the storage space is efficiently generated as compared with the prior art or the conventional "night-time retractable collapsible lens equipped with a night shot function".
- the lens frame can be stored using the space (Fig. 4A to 4C).
- the overall length of the collapsible lens 90 can be reduced to reduce the thickness.
- the storage area can be efficiently stored by retracting the infrared cut filter in the direction orthogonal to the optical axis L.
- FIG. 5A, 5B and 5C are cross-sectional views of a second embodiment of the collapsible lens according to the present application, wherein FIG. 5A is a retracted position in which the lens is stored when not in use; B shows the respective states' in the wide (wide-angle) position, and Fig. 5 C shows the tele (far-away) position.
- 6A and 6B are cross-sectional views for explaining the insertion and removal operation of the infrared cut filter of the retractable lens
- FIG. 7 is a side view showing the second group lens frame and the rear barrel
- FIG. FIG. 8 is a perspective view showing a second group lens frame and a rear lens barrel.
- the first group lens frame 10 holding a plurality of lenses 1 1 and the second group lens frame 1 3 B holding a plurality of lenses 1 3 a rotate the cam ring 1 2
- zooming is performed from the retracted position in Fig. 5A to the wide position in Fig. 5B and from the wide position in Fig. 5B by the drive, and vice versa.
- the operation of each is the same as described in Figure 1A, Figure IB and Figure 1C. Therefore, the description of the overlapping parts is omitted.
- the feature of the retractable lens 100 according to the second embodiment is that the optical filter is forced when the retracting mechanism 8 8 does not operate. And a forced retraction mechanism 92 for retracting from the optical axis to the outside of the optical axis. Therefore, the forced retracting mechanism 92 of the optical filter will be described below with reference to FIGS. 5A to 5C, 6A and 6B, 7 and 8. FIG.
- FIGS. 5A-5C, 6A, 6B, 7 and 8 the structures described in FIGS. 1A to 1C, 2 and 3A, and 3B are described. The same parts as the parts will be described with the same reference numerals.
- the collapsible lens (imaging lens unit) 100 according to the second embodiment has the entire configuration that is described in the nighttime photography possible with reference to FIG. 1A to FIG. 1C and the like. It is almost the same as the collapsible lens of “T function installed”, so here we will outline the overall configuration and explain in detail the differences.
- 10 is a first-group lens frame
- 12 is a cam ring
- 13 B is a second-group lens frame
- 16 is a rectilinear guide ring.
- a fixed ring 15 is integrally fixed to the front of the rear barrel 17 B.
- An optical low-pass cut filter 8 5 and a solid-state image sensor 24 are held in the rear lens barrel 17 B, and a red example showing an example of the optical filter in front of the optical low-pass cut filter 8 5 is shown.
- the outer cut filter 91 is arranged to be linearly movable between on the optical axis L and off the optical axis.
- the retracting mechanism 8 8 for moving the infrared cut filter 9 1 back and forth automatically retracts the infrared filter 9 1 to a predetermined position outside the optical axis when stored and retracted.
- a forced retraction mechanism 92 is provided in association with the retraction mechanism 8 8.
- the forced retraction mechanism 92 retracts the infrared cut filter 9 1 by a predetermined amount when the infrared cut filter 9 1 is not retracted to the predetermined position due to the malfunction of the retracting mechanism 8 8 in the retraction operation. It is forced to move to the position.
- a projection 92 which is a specific example of a forced retraction mechanism, is provided on the second lens frame 13B.
- the projection 92 provided on the second group lens frame 13 B is shaped like a wedge in which the end of the plate is tapered as shown in FIGS. 7 and 8 and the like, and is inclined to the end. Face 9 2 a is formed.
- the projection 92 moves the filter holder 82 in the direction away from the optical axis L by pressing the pressure receiving portion 7 9 c of the fan-shaped gear 7 9 of the power transmission mechanism 8 3 during the retraction operation. Activate the power transmission mechanism 8 3 to do so. That is, the forced retraction mechanism 92 of this embodiment operates the retraction mechanism 8 8 by using the force when the second lens group frame 13 B moves in the optical axis direction, and the infrared cut filter 9 1 It is configured to forcibly retract the lens from the optical axis L.
- the infrared cut filter 91 is the optical axis.
- the infrared filter filter 91 is set on the optical axis L as shown in FIG. 6A and the infrared cut filter 91 as shown in FIG. 6B.
- the nighttime photography is performed by the night shot function and the night framing function described above. Can.
- the power of the power source 76 is applied to the filter holder 82 (arrow H), as shown in FIG. 5A.
- the infrared range filter 9 1 is retracted in the direction orthogonal to the optical axis L via 8 2.
- the third group lens frame 18 B is stored in the space where the infrared light filter 91 is retracted in the direction perpendicular to the optical axis L (arrow 1).
- the third group lens frame 18 B is stored at a deeper position than in the conventional case, and stored in a thinner state.
- the vacant space of the third group lens frame 18 B is arranged along the predetermined cam carp 1 0 lens frame 10, second group lens frame 1 3 B and straight guide ring 1 6 can be stacked and stored (arrow A, arrow B and arrow C).
- the user manually operates based on the cause such as the user (user) turning off the power, sudden battery exhaustion, or sudden loss of power supply due to opening the battery box.
- the retracting operation is performed forcibly.
- the forcible retraction mechanism 92 works.
- the infrared cut filter 9 due to the user's forced retraction operation by the user or the malfunction of the retraction mechanism 8 during the retraction operation. Even when 1 is left on the optical axis L, the infrared cut filter 9 1 is forcibly retracted from the optical axis L on the optical axis L by the forced retraction mechanism 9 2 . Therefore, to prevent the infrared cut filter 91, its filter holder 82, etc. from contacting or interfering with other parts. Can prevent the breakage of the drive mechanism of the collapsible lens itself such as the infrared cut filter 91, the filter holder 82, its power transmission mechanism 83, or the cam ring 12 etc. And improve reliability O o
- the infrared range filter is configured to be retracted in the direction orthogonal to the optical axis, but the retraction direction may not be orthogonal to the optical axis, and the infrared range force may be used.
- a filter that can be moved in and out on the optical axis so that the filter functions properly for example, by moving the infrared power filter in a diagonal direction, or by rotating around a pivot.
- the configuration may be such that it moves in an arc shape, and is not limited to the infrared area force filter direction.
- the mechanism for inserting and removing the infrared cut filter is not limited to the above-described embodiment.
- the rear region is provided with a rear guide section 5 of the rear tube in which the infrared range cut filter can be moved in the direction orthogonal to the optical axis.
- a filter drive guide means (for example, a flap method, a swing method, etc.) may be configured, or may be provided in a palia drive mechanism etc.
- the lens configuration of the collapsible lens is not limited to the above-described embodiment, and the driving method of the collapsible lens may be as well.
- a drive source not only the step pinda motor but also Ultrasonic motor It is possible to use a general DC motor etc. Furthermore, it is not always necessary to have a gear switch. For example, direct drive by ultrasonic motor linear motor etc. It does not matter.
- the retractable structure of the retractable lens is not limited to the cam groove or cam pin mechanism, but may be any mechanism that accommodates the optical lens system thinly, for example, a pole screw type, rack and pinion It is possible to adopt various mechanisms such as the formula and linear motor type.
- optical filter retracted by the retraction mechanism 88 and the forced retraction mechanism 92 is not limited to the above-described infrared range power filter, and, for example, an optical low pass cut filter, liquid crystal Devices, EC elements and other optical filters can be applied.
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Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/532,329 US7295772B2 (en) | 2002-10-24 | 2003-10-24 | Optical unit and imaging device comprising optical unit |
EP03811880A EP1557715A4 (en) | 2002-10-24 | 2003-10-24 | OPTICAL UNIT AND IMAGING DEVICE EQUIPPED WITH THE OPTICAL UNIT |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002/310204 | 2002-10-24 | ||
JP2002310204A JP4239552B2 (ja) | 2002-10-24 | 2002-10-24 | 光学ユニット及び撮像装置 |
JP2002312946A JP4218308B2 (ja) | 2002-10-28 | 2002-10-28 | 光学ユニット及び撮像装置 |
JP2002/312946 | 2002-10-28 |
Publications (1)
Publication Number | Publication Date |
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WO2004049058A1 true WO2004049058A1 (ja) | 2004-06-10 |
Family
ID=32396241
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2003/013642 WO2004049058A1 (ja) | 2002-10-24 | 2003-10-24 | 光学ユニット及びその光学ユニットを備えた撮像装置 |
Country Status (4)
Country | Link |
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US (1) | US7295772B2 (ja) |
EP (1) | EP1557715A4 (ja) |
KR (1) | KR20050053785A (ja) |
WO (1) | WO2004049058A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100432734C (zh) * | 2004-07-26 | 2008-11-12 | 株式会社理光 | 镜筒、照相机和便携式信息终端设备 |
US7918261B2 (en) | 2007-01-18 | 2011-04-05 | Hon Hai Precision Industry Co., Ltd. | Apparatus and method for assembling lens module |
Families Citing this family (8)
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US7184123B2 (en) * | 2004-03-24 | 2007-02-27 | Asml Netherlands B.V. | Lithographic optical system |
JP2005340299A (ja) * | 2004-05-24 | 2005-12-08 | Matsushita Electric Ind Co Ltd | 固体撮像装置およびその製造方法並びにカメラ |
JP5014620B2 (ja) * | 2005-12-06 | 2012-08-29 | Hoya株式会社 | レンズ鏡筒の遮光装置 |
US8026955B2 (en) * | 2007-08-30 | 2011-09-27 | Honda Motor Co., Ltd. | Camera exposure controller including imaging devices for capturing an image using stereo-imaging |
KR20130136825A (ko) * | 2012-06-05 | 2013-12-13 | 삼성전자주식회사 | 줌 렌즈 경통 조립체 및 이를 구비한 촬영장치 |
KR102116365B1 (ko) * | 2012-09-12 | 2020-05-28 | 삼성전자주식회사 | 렌즈 경통 및 그를 구비한 디지털 카메라 |
KR101626579B1 (ko) * | 2014-02-28 | 2016-06-01 | 대원전광주식회사 | 카메라 렌즈 모듈 |
CN208026957U (zh) * | 2018-02-09 | 2018-10-30 | 瑞声科技(新加坡)有限公司 | 镜头模组 |
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- 2003-10-24 KR KR1020057006915A patent/KR20050053785A/ko active IP Right Grant
- 2003-10-24 EP EP03811880A patent/EP1557715A4/en not_active Withdrawn
- 2003-10-24 US US10/532,329 patent/US7295772B2/en not_active Expired - Fee Related
- 2003-10-24 WO PCT/JP2003/013642 patent/WO2004049058A1/ja active Application Filing
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US7918261B2 (en) | 2007-01-18 | 2011-04-05 | Hon Hai Precision Industry Co., Ltd. | Apparatus and method for assembling lens module |
Also Published As
Publication number | Publication date |
---|---|
US7295772B2 (en) | 2007-11-13 |
EP1557715A4 (en) | 2007-09-05 |
EP1557715A1 (en) | 2005-07-27 |
KR20050053785A (ko) | 2005-06-08 |
US20060165406A1 (en) | 2006-07-27 |
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