WO2015005056A1 - Dispositif d'imagerie - Google Patents

Dispositif d'imagerie Download PDF

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Publication number
WO2015005056A1
WO2015005056A1 PCT/JP2014/065581 JP2014065581W WO2015005056A1 WO 2015005056 A1 WO2015005056 A1 WO 2015005056A1 JP 2014065581 W JP2014065581 W JP 2014065581W WO 2015005056 A1 WO2015005056 A1 WO 2015005056A1
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WO
WIPO (PCT)
Prior art keywords
lens
array lens
movable holding
unit
imaging apparatus
Prior art date
Application number
PCT/JP2014/065581
Other languages
English (en)
Japanese (ja)
Inventor
篤広 野田
Original Assignee
コニカミノルタ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by コニカミノルタ株式会社 filed Critical コニカミノルタ株式会社
Publication of WO2015005056A1 publication Critical patent/WO2015005056A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • G02B3/0037—Arrays characterized by the distribution or form of lenses
    • G02B3/0056—Arrays characterized by the distribution or form of lenses arranged along two different directions in a plane, e.g. honeycomb arrangement of lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • 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
    • G02B7/08—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted to co-operate with a remote control mechanism
    • 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
    • G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
    • G03B3/10—Power-operated focusing
    • 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
    • G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
    • 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
    • G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B2205/0007—Movement of one or more optical elements for control of motion blur
    • 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
    • G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B2205/0053—Driving means for the movement of one or more optical element

Definitions

  • the present invention relates to an imaging apparatus using a multi-array lens.
  • image pickup devices for example, mobile phones with cameras
  • image quality in recent years, image pickup devices (for example, mobile phones with cameras) have dramatically improved image quality, and in addition to improving the basic function of image shooting such as increasing the number of pixels of the image pickup element, the focus function, Various functions such as a zoom function and a camera shake correction function are required to be added.
  • This type of imaging apparatus includes a movable holding unit that holds the lens unit movably and an actuator that drives the lens unit, and driving the lens unit by activating the actuator enables a focus function, a zoom function, and camera shake. It is common to implement a correction function.
  • Patent Document 1 discloses a set of parallel leaf springs arranged above and below the lens portion.
  • this type of imaging apparatus is also required to be downsized.
  • providing a movable holding portion that holds the lens portion movably with respect to the driving of the various actuators has been a factor in increasing the size of the apparatus.
  • the present invention has been made in view of the above circumstances, and an object of the present invention is to provide an imaging apparatus capable of suppressing the enlargement of the apparatus while maintaining the imaging accuracy by improving the movable holding portion. To do.
  • an imaging apparatus includes a fixed portion and a multi-array lens in which a plurality of unit lenses are arranged in parallel and spaced apart from each other.
  • a part of the lens unit is disposed between the lens unit disposed in the hollow space, and at least a part of the lens unit and the fixing unit positioned on the side of the lens unit.
  • a movable holding part that movably holds the at least part of the lens part, and an action part that directly or indirectly acts on the at least part of the lens part, and the action part is driven from the fixed part side.
  • FIG. 2 is a side view of the imaging apparatus 1 according to the first embodiment as viewed from the AA cross section of FIG.
  • FIG. 2 is a side view of the imaging apparatus 1 according to the first embodiment as viewed from a BB cross section in FIG. 1.
  • the imaging device 1 which concerns on 1st Embodiment it is the elements on larger scale of strip
  • the imaging device 1 which concerns on 1st Embodiment it is the XZ side view of the state which driven the actuator 5.
  • FIG. 3 is a diagram illustrating a state of coupling of the multi-array lens AL and the movable holding unit 4 in the imaging device 1 according to the first embodiment.
  • FIG. 3 is a diagram illustrating a state of coupling of the multi-array lens AL and the movable holding unit 4 in the imaging device 1 according to the first embodiment.
  • It is a top view of 1 A of imaging devices which concern on the modification of 1st Embodiment. It is a top view of imaging device 1B concerning the modification of a 1st embodiment. It is a top view of imaging device 1C concerning the modification of a 1st embodiment. It is a top view of imaging device 1D concerning the modification of a 1st embodiment.
  • FIG. 14 is an XZ side view of an imaging apparatus 1E according to a modification of the first embodiment, as viewed from a DD section in FIG.
  • FIG. 14 is an XZ side view of an imaging apparatus 1E according to a modification of the first embodiment, as viewed from a DD section in FIG.
  • FIG. 17 is an XZ side view of an imaging apparatus 1F according to a modification of the first embodiment, as viewed from the EE cross section of FIG. FIG.
  • FIG. 17 is an XZ side view of an imaging apparatus 1F according to a modification of the first embodiment, as viewed from the EE cross section of FIG. It is a top view of imaging device 1G concerning the modification of a 1st embodiment.
  • FIG. 20 is an XZ side view of an imaging apparatus 1G according to a modification of the first embodiment, as viewed from the FF cross section of FIG.
  • FIG. 20 is an XZ side view of an imaging apparatus 1G according to a modification of the first embodiment, as viewed from the FF cross section of FIG. It is the elements on larger scale of strip
  • FIG. 28 is an XZ side view of the imaging apparatus 1H according to the second embodiment as seen from a GG section in FIG.
  • FIG. 28 is an XZ side view of the imaging apparatus 1H according to the second embodiment as seen from a GG section in FIG.
  • It is a top view of imaging device 1I concerning the modification of a 2nd embodiment.
  • It is the side view which looked at the imaging device 1I which concerns on the modification of 2nd Embodiment from the HH cross section of FIG.
  • It is a top view of imaging device 1J concerning the modification of a 2nd embodiment.
  • FIG. 28 is an XZ side view of the imaging apparatus 1H according to the second embodiment as seen from a GG section in FIG.
  • FIG. 28 is an XZ side view of the imaging apparatus 1H according to the second embodiment as seen from a GG section in FIG.
  • It is a top view of imaging device 1I concerning the modification of a 2nd embodiment.
  • It is the side view which looked at the imaging device 1I
  • FIG. 33 is a side view of an imaging apparatus 1J according to a modification of the second embodiment, as viewed from a II cross section in FIG.
  • FIG. 33 is a side view of an imaging apparatus 1J according to a modification of the second embodiment, as viewed from a II cross section in FIG. It is a XZ side view of imaging device 1K concerning a 3rd embodiment. It is a YZ side view of imaging device 1K concerning a 3rd embodiment.
  • the lens unit LP includes only a multi-array lens as an optical element constituting the lens unit LP, and the lens unit LP displaced along the optical axis direction by an actuator is a multi-array lens AL (the lens unit in the imaging device 1G).
  • AL the lens unit in the imaging device 1G.
  • an imaging device having only a multi-array lens as an optical element constituting the lens portion LP, and the lens portion LP displaced along the direction orthogonal to the optical axis by an actuator is a multi-array lens AL. 1H to 1J will be described.
  • the imaging device includes a multi-array lens and a single lens as optical elements constituting the lens portion LP, and the optical element displaced by the actuator is a single lens as a part of the lens portion LP. 1K will be described.
  • the image pickup apparatus of these embodiments can have various sizes depending on its specific use, but is particularly useful as a small image pickup apparatus incorporated in a mobile phone or a tablet terminal.
  • FIG. 1 is a top view schematically showing main components of an imaging apparatus 1 according to the present invention.
  • 2 and 3 are side views as seen from the AA section and the BB section of FIG. 1, respectively.
  • the right-handed XYZ coordinates are attached as necessary for the purpose of clarifying the arrangement relationship of each part.
  • the upper direction means the + Z direction
  • the lower direction means the -Z direction.
  • the imaging apparatus 1 mainly includes a base 2, a side wall 3, a multi-array lens AL, and a movable holding unit 4 that is spanned over the side wall 3 and the multi-array lens AL and holds the multi-array lens AL at a reference position. And an actuator 5 that drives the multi-array lens AL in the optical axis direction (Z direction in the figure) and an image sensor 6 that receives light obtained through the multi-array lens AL. Each part is assembled.
  • the base 2 is fixed to a member (for example, a mobile phone housing or a mount substrate) to which the imaging device 1 is attached, and is a stationary member that constitutes the lower surface of the imaging device 1.
  • the base 2 is formed in a square plate shape in the XY plan view, and is entirely made of a resin material or the like.
  • the side wall 3 is an immovable member formed perpendicular to the base 2 and is constituted by four plate-like members corresponding to the square sides of the base 2.
  • the base 2 and the side wall 3 are box-shaped frame bodies that enclose a hollow space L1 that is optically opened to the external space by a predetermined window WD (a region on the + Z side without the base 2 and the side wall 3). It is a component of FL (fixed part).
  • this embodiment demonstrates the aspect whose fixing
  • the substantially plate-shaped optical element is disposed in the hollow space L1 in the frame body FL.
  • the multi-array lens AL (particularly, a portion related to the inter-lens region S1 described later) is made of glass or heat resistant resin.
  • the multi-array lens AL is affected by the heating. There is no problem caused by.
  • the belt-like SMA 50 is drawn in a rod shape, but the belt-like SMA 50 has a thin plate shape, and its plate surface is parallel to the unit lens array surface (XY plane) of the multi-array lens AL.
  • the movable holding portion 4 is a portion that is spanned between the side wall 3 and the multi-array lens AL and movably holds the multi-array lens AL at a reference position (position shown in FIGS. 1 to 3). It has a function as a rectilinear guide part that restricts the driving direction of the multi-array lens AL in the optical axis direction (Z direction) and a function as a holding part that holds the multi-array lens AL.
  • the movable holding part 4 is configured using four parallel leaf springs (elastic members).
  • the reference position is a position where the multi-array lens AL is arranged in a state where the actuator 5 is not activated.
  • the multi-array lens AL is held in parallel with the XY plane in a state in which the distance between the four sides of the outer edge of the multi-array lens AL and the four sides of the inner edge of the side wall 3 is kept constant in the XY plan view. The position becomes the reference position.
  • the two upper leaf springs 41 have the same height (Z position), one end attached to the side wall 3 and the other end attached to the upper surface (+ Z side) of the multi-array lens AL.
  • the arrangement of the two upper leaf springs 41 is determined to be point-symmetric in the XY plan view when viewed from the center point of the multi-array lens AL in the XY plan view (hereinafter referred to as “center point PO”).
  • the arrangement relationship of the two lower leaf springs 42 is the same, and the two lower leaf springs 42 have the same height position (Z position), one end of which is attached to the side wall 3 and the other end of the lower surface of the multi-array lens AL ( -Z side). Because of this arrangement relationship, in FIG. 1, two upper leaf springs 41 and two lower leaf springs 42 are arranged so as to overlap with each other, and 2 located on the front side (+ Z side) in a top view. Only one upper leaf spring 41 is depicted.
  • the movable holding unit 4 is provided with the multi-array lens AL for the purpose of maintaining the contact state between the tip of the strip SMA 50 and the multi-array lens AL during the driving period of the actuator 5 described later.
  • the multi-array lens AL is urged by the belt-like SMA 50.
  • a leaf spring 42 is designed.
  • FIG. 4 is a partially enlarged view illustrating an enlarged range (mainly actuator 5) surrounded by a dotted line in FIG.
  • the actuator 5 has a strip-shaped SMA 50 (action portion), a conductive wire 51 arranged in a parallel reciprocating path along the surface of the strip-shaped SMA 50, and a power supply unit (not shown).
  • This is a so-called SMA actuator that deforms the belt-shaped SMA 50 and applies a driving force to the multi-array lens AL.
  • the conducting wire 51 has a function as a linear heater that generates heat when it is energized. Further, the surface of the conducting wire 51 is covered with a thin electrical insulating layer so that when the conducting wire 51 is energized, the current does not leak into the strip SMA 50. Joule heat generated in the conducting wire 51 when the conducting wire 51 is energized is transmitted to the belt-like SMA 50 through the electrical insulating layer.
  • the band-shaped SMA 50 is a long plate-shaped member made of a shape memory alloy such as a Ni—Ti alloy, for example, and one end 50a in the longitudinal direction is fixed to the side wall 3, and the other end 50b is a multi-array lens.
  • the unit lenses LE are in contact with each other (see FIGS. 1 and 4).
  • an inter-lens area S1 a partial area within the arrangement interval of the plurality of unit lenses LE in the area on the surface of the multi-array lens AL.
  • the deformation of the belt-shaped SMA 50 is performed. Is preferable because an upward driving force (+ Z direction) can be applied to the multi-array lens AL more favorably.
  • the multi-array is held by holding the movable holding portion 4 (a set of parallel leaf springs including two upper leaf springs 41 and two lower leaf springs 42).
  • a slight spring force acts in the ⁇ Z direction with respect to the lens AL, and the multi-array lens AL is biased to the end portion 50 b of the belt-like SMA 50.
  • the strip-like SMA 50 is deformed in the ⁇ Z direction according to the spring force in a state where the elastic modulus is low (martensite phase) at a low temperature.
  • the belt-like SMA 50 shown in FIGS. 1 to 3 is a belt-like SMA in which this deformation has occurred, and the multi-array lens AL is held at the reference position by the belt-like SMA 50 after being deformed and the movable holding portion 4.
  • the multi-array lens AL is actuated (driven) in the + Z direction with the end 50b as an action point as the shape of the belt-like SMA 50 is recovered.
  • FIG. 5 is a side view of the imaging device 1 in a state in which the multi-array lens AL is driven in the + Z direction in accordance with the shape recovery of the belt-like SMA 50, as viewed from the AA cross section of FIG.
  • the amount of displacement of the multi-array lens AL in the + Z direction is adjusted by controlling the current supplied to the conducting wire 51 of the actuator 5 or controlling the applied voltage.
  • the power supply unit is provided with a control circuit (not shown) that controls the amount of current applied to the conducting wire 51 or the applied voltage in accordance with the required drive amount of the multi-array lens AL.
  • the strip SMA 50 functions as an action part that directly acts on the multi-array lens AL.
  • the actuator 5 functions as a drive unit that drives the band-like SMA 50 serving as the action unit from the side wall 3 side to reversibly displace the multi-array lens AL from the reference position.
  • the restoring force by the movable holding portion 4 increases as the displacement amount from the reference position of the multi-array lens AL increases. Therefore, the actuator increases as the displacement amount increases.
  • the required driving force (required current amount or required voltage) due to 5 also increases. In general, from the viewpoint of securing the Z-direction driving range of the multi-array lens AL by the actuator 5, it is desirable that this required driving force is small.
  • the length in the longitudinal direction is secured by meandering the movable holding portion 4 (upper plate spring 41 and lower plate spring 42) as shown in FIG.
  • the spring constant of the movable holding portion 4 is reduced, and the elastic force by the movable holding portion 4 is reduced according to the Hooke's law. Therefore, although there is an increase in the required driving force by the actuator 5 due to the increase in the displacement amount, the required driving force can be suppressed as a whole.
  • the belt-like SMA 50 is cooled and returns to the martensite phase, and the driving force in the + Z direction disappears.
  • the multi-array lens AL returns to the reference position due to the balance between the spring force in the ⁇ Z direction by the movable holding portion 4 that holds the multi-array lens AL and the acting force in the + Z direction in the strip SMA 50 in the martensite phase. .
  • the multi-array lens AL can be reversibly displaced from the reference position along the optical axis direction (Z direction) in accordance with the amount of current applied to the conducting wire 51 or the applied voltage. Then, zoom adjustment and focus adjustment in the imaging apparatus 1 are realized by the displacement of the multi-array lens AL in the optical axis direction.
  • the electrically insulated conductor 51 is reciprocated along the strip SMA 50, and the conductor 51 is energized and heated.
  • the strip SMA itself may have a reciprocating shape, and the strip SMA may be energized to reversibly deform the strip SMA with Joule heat generated from the strip SMA itself.
  • the same effect as that of making the holding portion 4 meander can be generally achieved by making the holding portion 4 non-linear (curved or bent).
  • the imaging device 6 is coupled to the base 2 (a part of the frame body FL) on the opposite side ( ⁇ Z side) to the window WD provided on the + Z side with respect to the multi-array lens AL, and is incident from the window WD to enter the multi-array.
  • Measurement light (a plurality of unit imaging light beams IR described later with reference to FIG. 6) obtained through the plurality of unit lenses LE of the lens AL is received.
  • the measurement light is photoelectrically converted and sent as image data to a predetermined data processing device (not shown).
  • FIG. 6 is a diagram in which a plurality of unit imaging light beams IR are added to the end view of the imaging apparatus 1 as viewed from the CC end surface in FIG.
  • the unit imaging light beam IR means a light beam that passes through the unit lenses LE constituting the multi-array lens AL.
  • the hollow space L1 of the frame body FL (the base 2 and the side wall 3) is defined.
  • an “effective optical region L2” that is a spatial region through which at least one of the plurality of unit imaging light beams IR passes
  • an “effective inter-optical region L3” that is a spatial region corresponding to a spatial arrangement interval of the plurality of unit imaging light beams IR
  • C The following description will be made by virtually dividing the hollow space L1 into three space regions of “effective optical outside region L4” that does not belong to any of the effective optical region L2 and the effective optical region L3.
  • the effective optical region L2 is a passage region of the measurement light from when the measurement light is incident through the window WD of the imaging device 1 until it is received by the image sensor 6. Therefore, from the viewpoint of maintaining imaging accuracy (decreasing noise in imaging), the effective optical region L2 optically affects the measurement light for purposes other than the optical design of the apparatus (blocking, attenuation, and measurement light). It is desirable not to arrange a member that reflects or refracts.
  • the two upper leaf springs 41 and the two lower leaf springs 42 constituting the movable holding portion 4 are fixed in the longitudinal direction from the viewpoint of reducing the elastic force by reducing the spring constant. It is desired to be designed long.
  • a part of the movable holding portion 4 (two upper leaf springs 41 and two lower leaf springs 42) is plural.
  • Each unit is arranged so as to pass through an effective inter-optical region L3 that is a spatial arrangement interval of the plurality of unit imaging light beams IR that respectively pass through the unit lenses LE.
  • FIGS. 7 and 8 are partially enlarged views showing a state of coupling between the upper plate spring 41 of the movable holding portion 4 and the multi-array lens AL.
  • the state of coupling between the upper leaf spring 41 and the upper surface of the multi-array lens AL will be described with reference to FIGS.
  • the coupling between the lower leaf spring 42 and the lower surface of the multi-array lens AL is the same as the coupling between the upper leaf spring 41 and the upper surface of the multi-array lens AL, duplicate explanation is omitted.
  • the tip 41a of the upper leaf spring 41 is an annular part having a hollow part inside in the XY plan view.
  • a cylindrical projection 91 (a coupling portion) having a height in the Z direction is provided on the upper surface of the multi-array lens AL, and the inner edge of the annular portion and the projection 91 are viewed in XY plan view.
  • the outer edge is substantially the same circular shape.
  • the protrusion 91 of the multi-array lens AL can be fitted to the tip 41a (annular portion) of the upper leaf spring 41 (FIG. 7). Then, the adhesive material BA is supplied to the contact portion between the tip 41a of the upper leaf spring 41 and the projection 91 of the multi-array lens AL in this fitted state. As a result, the upper leaf spring 41 and the multi-array lens AL are fixed (FIG. 8).
  • the protrusion 91 (coupling portion) for fixedly coupling the end portion of the movable holding portion 4 to the upper surface of the multi-array lens AL is provided.
  • the multi-array lens AL is directly attached to the movable holding unit 4. Therefore, the apparatus can be reduced in size.
  • the upper leaf spring 41 can be substantially expanded and contracted.
  • a sufficient length (the length connecting the two points when the spring is fixed to the other member at two points) can be sufficiently secured, and the spring constant can be reduced.
  • plate spring 41 can be reduced and the drive area of the multi-array lens AL can be ensured.
  • the actuator 5 is driven so that the multi-array lens AL is not fixed in the movable holding portion 4.
  • the relative positional relationship between the portion and the multi-array lens AL can change. For this reason, it is desirable that the imaging apparatus 1 is designed so that the movable holding unit 4 is not disposed in the effective optical region L2 at any point in the driving process of the multi-array lens AL as a design consideration.
  • the distal end portion 41a of the movable holding portion 4 is coupled to the multi-array lens AL at a part of the surface of the multi-array lens AL and not belonging to the effective optical region L2, the distal end A sufficient area in the XY plane of the portion 41a can be secured.
  • imaging devices 1A to 1D as in the imaging device 1 of the first embodiment, by arranging a part of the movable holding portion so as to pass through the effective inter-optical region L3, imaging is performed. Maintenance of accuracy, suppression of device enlargement, and securing of the driving range of the multi-array lens AL can be achieved at the same time.
  • FIG. 9 is a top view showing the imaging apparatus 1A that holds the multi-array lens AL movably by the movable holding portion 4A.
  • the movable holding portion 4A is the same as the movable holding portion 4 of the first embodiment in that it uses a meandering leaf spring, but the number of leaf springs used is different.
  • the movable holding portion 4A has four upper leaf springs 411 and four lower leaf springs, and a set of one upper leaf spring 411 and one lower leaf spring is an inner wall of each surface of the side wall 3 (a total of four surfaces).
  • a set of one upper leaf spring 411 and one lower leaf spring is an inner wall of each surface of the side wall 3 (a total of four surfaces).
  • the movable holding portion is sufficient if it is configured to be spanned between the frame body FL and the multi-array lens AL (lens portion LP) and hold the multi-array lens AL movably at a predetermined reference position. . Therefore, it may be constituted by four upper leaf springs 411 and four lower leaf springs as in the movable holding portion 4A (FIG. 9) of this modification.
  • each upper leaf spring and each lower leaf spring is a multi-array lens AL as in the movable holding portions 4 and 4A of the imaging devices 1 and 1A.
  • the multi-array lens AL can be accurately guided along the optical axis direction if arranged symmetrically with respect to the center point PO in the XY plane view.
  • FIG. 10 is a top view showing the imaging apparatus 1B that holds the multi-array lens AL movably by the movable holding portion 4B.
  • the movable holding portion 4B uses a leaf spring having a plurality of annular portions (three annular portions in the present modification), and is different from the movable holding portion 4 of the first embodiment that uses a meandering leaf spring.
  • the leaf spring shape is different.
  • the movable holding portion 4B includes four upper leaf springs 412 each having three annular portions 412b, and four lower leaf springs each having three annular portions, and one upper leaf spring 412 and 1 A set of two lower leaf springs is bridged from each surface (four surfaces in total) of the side wall 3 to the multi-array lens AL, and the multi-array lens AL is held movably.
  • four upper leaf springs 412 and four lower leaf springs are arranged so as to overlap each other, and the four upper leaf springs 412 located on the front side (+ Z side) in a top view. Only drawn.
  • Each annular portion 412b of the upper leaf spring 412 has a hollow portion inside in the XY plan view. Further, the inner edge of the annular portion 412b has a circular shape that is substantially the same as the outer edge of the unit lens LE of the multi-array lens AL in the XY plan view. Furthermore, the arrangement interval of the three annular portions 412b included in one upper leaf spring 412 matches the arrangement interval of the unit lenses LE included in the multi-array lens AL.
  • the three unit lenses LE included in the multi-array lens AL can be fitted into the three annular portions 412b included in the upper leaf spring 412 (FIG. 10).
  • the most annular portion 412b (tip portion 412a) of the three annular portions 412b of the upper leaf spring 412 and the unit lens LE of the multi-array lens AL are fixed.
  • the distal end portion 412a means an end portion of the elongated upper leaf spring 412 opposite to the proximal end side when the side fixed to the side wall 3 is the proximal end side.
  • the upper plate spring 412 can be secured with a sufficient length in the longitudinal direction, and its spring constant can be reduced. Thereby, the elastic force of the upper leaf spring 412 can be reduced, and the driving range of the multi-array lens AL can be secured.
  • This configuration is the same for the lower leaf spring. Note that, in the embodiment in which the tip of each leaf spring and the multi-array lens AL are fixed as in this modification, a portion of the movable holding portion 4B that is not fixed to the multi-array lens AL by driving the actuator. And the relative positional relationship between the multi-array lens AL can be changed. For this reason, as with the imaging device 1, it is desirable to design the movable holding unit 4B so as not to be disposed in the effective optical region L2 at any point in the driving process of the multi-array lens AL as a design consideration.
  • the upper plate springs 412 and the lower plate springs are arranged point-symmetrically in the XY plan view when viewed from the center point PO of the multi-array lens AL, so that the multi-array lens AL is mounted. It is possible to guide accurately along the optical axis direction.
  • FIG. 11 is a top view showing the imaging apparatus 1C that holds the multi-array lens AL movably by the movable holding portion 4C.
  • the movable holding part 4C is different from the movable holding part 4 of the first embodiment using a meandering plate spring in that a linear plate spring is used.
  • the movable holding portion 4C has two upper leaf springs 413 and two lower leaf springs, and these two upper leaf springs 413 and two lower leaf springs are multi-arrayed from one surface of the side wall 3 (the side wall 3 on the + X side).
  • the multi-array lens AL is held movably across the lens AL.
  • two upper leaf springs 413 and two lower leaf springs are arranged so as to overlap each other, and two upper leaf springs 413 located on the near side (+ Z side) in a top view. Only drawn.
  • the movable holding portion is sufficient if it is configured to be spanned between the frame body FL and the multi-array lens AL (lens portion LP) and hold the multi-array lens AL movably at a predetermined reference position. . Therefore, as in the movable holding portion 4C (FIG. 11) of this modification, the upper leaf spring 413 and the lower leaf spring may be arranged instead of being point symmetric when viewed from the center point PO of the multi-array lens AL. Note that, as in the case of the present modification, even in an aspect using a linear leaf spring, as in the imaging device 1, as a design consideration, the movable holding is possible at any point in the driving process of the multi-array lens AL. It is desirable to design the portion 4C so as not to be disposed in the effective optical region L2.
  • FIG. 12 is a top view showing the imaging device 1D that holds the multi-array lens AL movably by the movable holding portion 4D.
  • the movable holding portion 4D is different from the movable holding portion 4 of the first embodiment using a meandering leaf spring in that a linear wire spring is used.
  • the movable holding portion 4D has two upper line springs 414 and two underline springs, and these two upper line springs 414 and two underline springs are spanned from one surface of the side wall 3 (the side wall 3 on the + X side) to the multi-array lens AL. Then, the multi-array lens AL is held movably.
  • FIG. 12 similarly to FIG. 1, two upper line springs 414 and two underline springs are arranged so as to overlap each other, and only two upper line springs 414 located on the front side (+ Z side) in a top view are drawn. It is.
  • the movable holding portion is sufficient if it is configured to be spanned between the frame body FL and the multi-array lens AL (lens portion LP) and hold the multi-array lens AL movably at a predetermined reference position.
  • the spring shape is not limited to the leaf spring, and various holding members such as the upper line spring 414 and the lower line spring can be used.
  • the design consideration is that the movable holding portion 4D is at any point in the driving process of the multi-array lens AL. Is desirably designed so as not to be disposed in the effective optical region L2.
  • the imaging devices 1E to 1G described below a case will be described in which two upper leaf springs 41 and two lower leaf springs 42 are employed as the movable holding portions, similarly to the movable holding portion 4 of the first embodiment. Also in the imaging devices 1E to 1G, as in the imaging device 1 of the first embodiment, a part of the movable holding portion is disposed in the effective inter-optical region L3 to maintain imaging accuracy, suppress the enlargement of the device, and Ensuring the driving range of the multi-array lens AL is achieved at the same time.
  • FIG. 13 is a top view schematically showing main components of the imaging apparatus 1E.
  • 14 and 15 are DD cross-sectional views of the imaging device 1E in FIG.
  • the imaging device 1E is different from the imaging devices 1 and 1A to 1D described above in that the actuator 5E serves as a working portion instead of the belt-like SMA 50 and a multi-array. It is a point provided with linear SMA53 (so-called SMA wire) provided between the lenses AL.
  • the remaining configuration of the imaging device 1E is the same as that of the imaging device 1 of the first embodiment.
  • the actuator 5E has a linear SMA 53 (action part), a conducting wire 51 for energizing the linear SMA 53, and a power supply unit (not shown), and deforms the linear SMA 53 by energizing and heating the conducting wire 51 by the power supply unit.
  • This is a so-called SMA actuator that contracts and applies a driving force to the multi-array lens AL.
  • the linear SMA 53 is a linear member made of a shape memory alloy such as a Ni—Ti alloy, for example, and both ends 53a and 53b are fixed at the same YZ position on the opposite side wall 3 ( ⁇ X side wall 3). .
  • a constant section 53c on the center side (hereinafter referred to as “action section 53c”) of the entire length of the linear SMA 53 is applied to the inter-lens area S1 on the lower surface side ( ⁇ Z side) of the multi-array lens AL in a tensioned state. Touched.
  • FIG. 14 shows the linear SMA in a state where this deformation (extension) has occurred, and the multi-array lens AL is held at the reference position by the linear SMA 53 and the movable holding portion 4 after the deformation.
  • the conducting wire 51 having the first electrode 51a is connected in the vicinity of the + X side end portion 53a of the linear SMA 53, and the conducting wire 51 having the second electrode 51b is connected to the ⁇ X side end portion of the linear SMA 53. It is connected near 53b.
  • FIG. 15 is a side view showing the imaging apparatus 1E after driving in the + Z direction.
  • the action section 53c of the linear SMA 53 passes through the center point PO (center of gravity) of the multi-array lens AL, and the entire linear SMA 53 is symmetrically arranged as viewed from the center point PO (point symmetry). ) Is preferable because the actuator 5E can drive the multi-array lens AL with a favorable upward (+ Z direction) driving force.
  • the linear SMA 53 functions as an action part that directly acts on the multi-array lens AL.
  • the actuator 5E functions as a drive unit that drives the linear SMA 53, which is an action unit, from the side of the side wall 3 serving as a fixed end thereof and reversibly displaces the multi-array lens AL from the reference position.
  • the linear SMA 53 is cooled and returns to the martensite phase, and the driving force in the + Z direction disappears.
  • the multi-array lens AL is brought to the reference position by the balance between the spring force in the -Z direction by the movable holding portion 4 holding the multi-array lens AL and the acting force in the + Z direction in the linear SMA 53 of the martensite phase.
  • the actuator has an action part that directly or indirectly acts on the multi-array lens AL (lens part LP) and that the action part can be driven from the frame body side to reversibly displace the multi-array lens AL from the reference position. . Therefore, an actuator using the linear SMA 53, such as the actuator 5E of this modification, may be used.
  • FIG. 16 is a top view illustrating a schematic configuration of an imaging apparatus 1F that uses the lever mechanism 54 as the actuator 5F.
  • 17 and 18 are side views showing a schematic configuration of the image pickup apparatus 1F as seen from the section EE in FIG.
  • the lever mechanism 54 mainly includes an arm portion 541 disposed along the X direction so that a distal end portion 541a (+ X direction end portion) is in contact with the lower surface of the multi-array lens AL, and a proximal end of the arm portion 541.
  • the extended portion 542 extending in the Z direction from the portion ( ⁇ X direction end portion), the rotating shaft 543 penetrating in the Y-axis direction with respect to the upper portion of the extended portion 542, and the lower portion of the extended portion 542 A linear SMA 53 that applies a driving force in the + X direction to the extending portion 542.
  • the base end portion of the arm portion 541 and the lower portion of the extending portion 542 are fixed, and these have an L-shape when viewed from the side of the XZ (FIGS. 17 and 18).
  • the rotary shaft 543 is a rod-like member extending along the Y-axis direction, and both ends thereof are fixed to the ⁇ Y side wall 3 respectively. Further, in the central portion, the upper portion of the extending portion 542 is penetrated in the Y-axis direction. For this reason, the extending portion 542 and the arm portion 541 that are integrated with each other can rotate around the rotation shaft 543 (Y axis) that penetrates the extending portion 542 while maintaining the L-shaped shape. Yes.
  • the linear SMA 53 is a member that applies a driving force in the + X direction to the lower portion of the extending portion 542, and both side end portions 53a and 53b are fixed to the same XZ position on the side wall 3 on the ⁇ Y side.
  • a V-shaped groove 544 is provided on the ⁇ X side side of the lower portion of the extended portion 542, and the action section 53e of the linear SMA 53 is stretched over the V-shaped groove 544 in a tensioned state.
  • the conducting wire 51 is connected to the vicinity of both ends 53a and 53b of the linear SMA 53 for the purpose of phase transformation of the linear SMA 53 by energization.
  • the spring force in the ⁇ Z direction applied to the multi-array lens AL by the movable holding portion 4 is connected to the arm portion 541 in contact with the lower surface of the multi-array lens AL and the arm portion 541.
  • the force is applied to the linear SMA 53 as a force in the tangential direction ( ⁇ X direction) with the rotation shaft 543 as the rotation center.
  • a linear SMA 53 shown in FIG. 17 is a linear SMA in a state where this deformation (extension) has occurred, and the multi-array lens AL is brought into a reference position by the lever mechanism 54 having the linear SMA 53 after deformation and the movable holding portion 4. Retained.
  • FIG. 18 is a side view showing the imaging device 1F after driving in the + Z direction.
  • the entire lever mechanism 54 including the arm portion 541, the extending portion 542, the rotating shaft 543, and the linear SMA 53 directly acts on the multi-array lens AL. Functions as a working part.
  • the actuator has an action part, and the action part is driven from the side wall side to reversibly displace the multi-array lens AL from the reference position.
  • the action of is a post-conversion action after the direction and magnitude of the original action (the action in the + X direction due to the contraction of the linear SMA 53) is converted by the action force conversion mechanism (in this embodiment, the lever mechanism 54). I do not care.
  • the design of each part is adjusted based on a known principle (for example, JP 2009-37059 A).
  • a displacement amount larger than the displacement amount (shrinkage amount) of the linear SMA 53 due to the phase transformation can be applied as the displacement amount (drive amount) of the multi-array lens AL in the optical axis direction.
  • the driving amount of the multi-array lens AL can be sufficiently secured, and the focus function and the zoom function can be improved.
  • an imaging apparatus that does not have an acting force conversion mechanism in this embodiment, the lever mechanism 54, such as the imaging apparatuses 1 and 1A to 1E, can be downsized.
  • FIG. 19 is a top view schematically showing main components of the imaging apparatus 1G.
  • 20 and 21 are side views showing a schematic configuration of the imaging apparatus 1G viewed from the FF cross section of FIG.
  • the imaging device 1G includes a voice coil motor mechanism (hereinafter referred to as “VCM mechanism 55”) as an actuator 5G for driving the multi-array lens AL along the optical axis.
  • VCM mechanism 55 voice coil motor mechanism
  • the imaging apparatus 1G has a holder body (hereinafter referred to as “lens holder LH”) that holds the multi-array lens AL inside.
  • the lens holder LH is an annular member having an outer edge and an inner edge that are substantially square in the XY plan view, and the inner edge is a member such as a resin bonded to the outer edge of the multi-array lens AL.
  • a configuration in which the outer edge of the multi-array lens AL and the inner edge of the lens holder LH are bonded together is referred to as a “lens unit LU”.
  • the Z-direction length of the lens holder LH is configured to be the same as the Z-direction length of the multi-array lens AL, and the upper and lower surfaces of the lens holder LH and the upper and lower surfaces of the multi-array lens AL
  • the multi-array lens AL and the lens holder LH are integrated so that they are at the same height position.
  • the movable holding part 4G is constituted by two upper plate springs 41 and two lower plate springs 42 having a meandering shape, like the movable holding part 4 of the first embodiment, and these two upper plate springs 41 and two lower plates are arranged.
  • a spring 42 is stretched over the side wall 3 and the multi-array lens AL.
  • the movable holding portion 4G is different from the previously described movable holding portion 4 having the spring force (bias force) in the ⁇ Z direction in a state where the multi-array lens AL is held at the reference position, and the multi-array lens AL is set at the reference position. There is no spring force in the Z direction in the holding state.
  • the movable holding portion 4G holds the lens unit LU (and the two magnets 551 connected to the side surface of the lens unit LU) at the reference position only with the holding force (FIG. 20).
  • the driving principle of the actuator 5G in this modification does not use the elastic force change due to the phase transformation like the SMA actuator described above, and it is not necessary to apply a bias force to the actuator at the reference position.
  • the driving principle of the actuator 5G will be described later.
  • the VCM mechanism 55 includes two magnets (permanent magnets) 551 connected to the side surface of the lens unit LU, two coils 552 provided on the inner edge of the opposing ⁇ X side wall 3, a power supply unit (not shown), Have Magnet 551 has a first polarity (for example, N pole) in the + Z direction of FIG. 20 and a second polarity (for example, S pole) in the ⁇ Z direction.
  • a lead wire (not shown) is wound so that an S pole and an N pole are formed along the Z direction near the intermediate height, as shown in FIG. ing.
  • a displacement force along the optical axis direction can be applied to the two magnets 551 by the principle of a so-called linear motor using electromagnetic force.
  • the coil 552 is energized, as shown in FIG. 21, the N pole of the coil 552 and the S pole of the magnet 551 face each other, and the S pole of the coil 552 and the N pole of the magnet 551 face each other.
  • an electromagnetic displacement force as indicated by a broken-line arrow acts on the magnet 551. This displacement force is defined by the magnitude of the current flowing through the two coils 552.
  • the two magnets 551 and the two coils 552 are arranged symmetrically with respect to the multi-array lens AL held by the movable holding portion 4 when viewed from the center point PO in the XY plan view. This is desirable because the electromagnetic force can be applied more accurately along the optical axis direction (Z direction).
  • the movable holding portion 4G of this modification holds the multi-array lens AL (and the two magnets 551 connected to the lower surface of the multi-array lens AL) at the reference position only by the holding force. (FIG. 20).
  • the VCM mechanism 55 is activated by passing a current through the two coils 552 and the displacement force is applied to the multi-array lens AL, the multi-array lens AL moves to the spring of the movable holding portion 4G according to the displacement force. It is driven along the + Z direction against the force (FIG. 21).
  • the two magnets 551 function as an action unit that applies a displacement force to the multi-array lens AL.
  • the actuator 5G VCM mechanism 55
  • This drive is a remote drive using a remote interaction by electromagnetic force.
  • an iron piece or the like can be used instead of the magnet 551.
  • the actuator is separated from the first portion (the coil 552 in this embodiment) coupled to the frame body FL and the first portion, and the second portion coupled to at least a part of the lens portion LP.
  • a portion (a magnet 551 in the present embodiment), and reversibly displaces the at least part of the lens portion LP from the reference position by electromagnetic remote interaction between the first portion and the second portion. There may be.
  • Zoom adjustment and focus adjustment in the imaging apparatus 1G are realized by reversibly displacing the multi-array lens AL from the reference position along the optical axis direction (Z direction) by the actuator 5G (VCM mechanism 55).
  • the configuration in which the two coils 552 are arranged on the side wall 3 (the inner wall portion of the frame body FL) and the two magnets 551 are arranged on the multi-array lens AL has been described.
  • two magnets 551 may be disposed on the side wall 3 (inner wall portion of the frame body FL), and two coils 552 may be disposed on the multi-array lens AL.
  • An imaging device having the same effect can be obtained even when a bimetallic strip member is used as the action portion of the actuator 5 instead of the strip SMA 50.
  • an electrically insulated heater wire is attached to the bimetal, and the amount of bending of the bimetal is changed by controlling the amount of electricity applied to the heater wire, thereby at least the lens portion LP. A part can be displaced reversibly.
  • the reciprocating wire 51 passes along the strip
  • the wiring type energization method has been described (FIG. 4), the present invention is not limited to this.
  • both end portions 50a of a strip-shaped SMA 50 formed in a substantially U-shape are fixed to the side wall 3, and the U-shaped folded portion 50c of the strip-shaped SMA 50 is connected to the center point PO of the multi-array lens AL.
  • a conductive wire 51 may be provided in the vicinity of both end portions 50a so that the belt-like SMA 50 can be energized.
  • various energization modes capable of energizing substantially the entire strip SMA 50 spanned between the side wall 3 and the multi-array lens AL can be employed.
  • the protrusion 91 of the multi-array lens AL is fitted to the tip 41a (annular portion) of the upper plate spring 41, and both Although the method to adhere
  • a modification of the method for coupling the upper leaf spring 41 and the multi-array lens AL will be described with reference to FIGS.
  • FIG. 23 and 24 are partially enlarged views showing a state of coupling between the upper plate spring 41 of the movable holding portion 4 and the multi-array lens AL.
  • the front end 41a of the upper leaf spring 41 has a substantially circular shape in the XY plan view.
  • two projections 92 and 93 are provided on the upper surface of the multi-array lens AL, and the inner edge of the two projections 92 and 93 and the outer edge of the tip portion 41a are substantially the same in the XY plan view. It has the same circular shape.
  • the tip 41a of the upper leaf spring 41 can be fitted into the portion surrounded by the upper surface of the multi-array lens AL and the two protrusions 92, 93 provided on the upper surface (FIG. 23). Then, the adhesive material BA is supplied to the contact portion between the tip portion 41a of the upper leaf spring 41 and the projections 92 and 93 of the multi-array lens AL in this fitted state. As a result, the upper leaf spring 41 and the multi-array lens AL are fixed (FIG. 24).
  • FIG. 25 and 26 are partially enlarged views showing a state of coupling between the upper plate spring 41 of the movable holding portion 4 and the multi-array lens AL.
  • the distal end portion 41a of the upper leaf spring 41 is an annular portion having a hollow portion inside in the XY plan view.
  • a cylindrical projection 91 (a coupling portion) having a height in the Z direction is provided on the upper surface of the multi-array lens AL, and the inner edge of the annular portion and the projection 91 are viewed in XY plan view.
  • the outer edge is substantially the same circular shape.
  • the protrusion 91 of the multi-array lens AL can be fitted to the tip 41a (annular portion) of the upper leaf spring 41 (FIG. 25). Then, the protrusions 91 of the multi-array lens AL in this fitted state are pressurized and crimped from the + Z direction. As a result, the upper leaf spring 41 and the multi-array lens AL are joined (FIG. 26). In addition, the dotted line circle mark of FIG. 26 shows the protrusion part 91 before performing the said crimping.
  • the multi-array lens AL has a coupling portion for coupling with the movable holding portion within the arrangement interval (inter-lens region S1) of the plurality of unit lenses LE, and the movable holding portion is the multi-array lens in the inter-lens region S1. If the aspect is coupled to the coupling portion of AL (for example, the imaging devices 1B to 1D shown in FIGS. 10 to 12), a sufficient area in the XY plane can be secured as a configuration related to the coupling.
  • the multi-array lens AL formed separately and the movable holding portion have been described.
  • the multi-array lens AL and the movable holding portion are integrally formed (typical).
  • the same result combined product of the multi-array lens AL and the movable holding portion
  • Imaging Device 1H ⁇ 2.1 Configuration of Imaging Device 1H> So far, the imaging devices 1, 1A to 1G that reversibly displace the multi-array lens AL from the reference position along the optical axis direction (Z direction) have been described. Hereinafter, unlike the imaging devices 1 and 1A to 1G, the imaging device 1H that reversibly displaces the multi-array lens AL from the reference position along the direction perpendicular to the optical axis (in the present embodiment, the X direction). explain.
  • FIG. 27 is a top view schematically showing main components of the imaging apparatus 1H according to the second embodiment.
  • FIG. 28 is a side view of the imaging device 1H viewed from the GG cross section of FIG.
  • Actuator 5H includes two linear SMAs 56 and 57 having the same configuration (length, diameter, elastic coefficient, etc.) as an action unit for driving multi-array lens AL along the X direction perpendicular to the optical axis.
  • the multi-array lens AL has two protrusions 71 formed at predetermined intervals in the Y direction for the purpose of bridging the linear SMA 56 on the upper surface (+ Z side) and the Y direction for the purpose of bridging the linear SMA 57. And two protrusions 72 formed at a predetermined interval.
  • the movable holding portion 4H (the two upper line springs 414 and the two lower line springs 424) holds the multi-array lens AL at the height of the reference position with only the holding force without having a bias force along the Z direction. (FIGS. 28 and 29). This is because the driving direction of the multi-array lens AL by the actuator 5H is along the X direction and not along the Z direction. Also in the imaging device 1H, as in the imaging device 1, the design consideration is that the movable holding portion 4H is not arranged in the effective optical region L2 at any point in the driving process of the multi-array lens AL. It is desirable.
  • Both ends 56a and 56b of the linear SMA 56 are fixed to the -X side wall 3, and the wire portion is stretched over the two protrusions 71 on the multi-array lens AL, and is in a tension state.
  • both ends 57a and 57b of the linear SMA 57 are fixed to the + X side wall 3, and the wire portion is bridged between the two protrusions 72 on the multi-array lens AL to be in a tension state. .
  • both end portions 56a and 56b of the linear SMA 56 and both end portions 57a and 57b of the linear SMA 57 are fixed at the same height (Z direction position). Further, the end portion 56a of the linear SMA 56 and the end portion 57a of the linear SMA 57 are arranged at the same position in the Y direction. Similarly, the end portion 56b of the linear SMA 56 and the end portion 57b of the linear SMA 57 are arranged at the same position in the Y direction.
  • the two linear SMAs 56 and 57 having the same configuration are arranged symmetrically with respect to the center point PO of the multi-array lens AL in the XY plan view, so that the multi-array lens AL is provided. It is spanned between the provided projections 71 and 72.
  • the linear SMA 56 has two protrusions.
  • first acting force the elastic force acting on the multi-array lens AL on the ⁇ X side
  • second acting force the elastic force acting on the balance is balanced at the reference position.
  • each of the linear SMAs 56 and 57 is provided with a conducting wire 51 and a power supply unit (not shown).
  • the multi-array lens AL is driven along the X direction to a position where the first acting force and the second acting force can be balanced.
  • FIG. 29 is a side view of the imaging apparatus 1H in a state in which only the linear SMA 57 is energized and heated and the multi-array lens AL is driven along the + X direction.
  • the linear SMA 57 returns to a low temperature and low elastic modulus (martensitic phase), and the linear SMA 56 , 57 have the same elastic modulus in the martensite phase, and the multi-array lens AL returns to the reference position (FIG. 28) where the first acting force and the second acting force are balanced.
  • the linear SMAs 56 and 57 function as an operation unit that directly acts on the multi-array lens AL.
  • the multi-array lens AL can be driven (displaced) along the direction orthogonal to the optical axis by driving the actuator 5G. Therefore, the actuator 5H is effective for realizing various functions for displacing the multi-array lens AL in a direction orthogonal to the optical axis direction, such as a camera shake correction function. Note that in the imaging apparatus 1H of the present modification, the configuration in which the multi-array lens AL is driven along the X direction by the actuator 5H has been described, but this may be driven along the Y direction.
  • movable holding portion 4H Also in the imaging device 1H of the second embodiment, like the imaging devices 1 and 1A to 1G, by disposing a part of the movable holding portion 4H in the effective inter-optical region L3, it is possible to maintain imaging accuracy and increase the size of the device. Suppression and securing the driving range of the multi-array lens AL can be achieved at the same time.
  • FIG. 30 is a top view showing a schematic configuration of the imaging apparatus 1I using the link mechanism 43 as the movable holding portion 4I.
  • FIG. 31 is a side view of the imaging device 1I as seen from the HH section of FIG. Further, FIG. 31 shows a plurality of unit imaging light beams IR.
  • the movable holding portion 4I (link mechanism 43) mainly includes a fixing member 431 fixed to the side wall 3 on the + Y side, and a plurality of link members 432 (this book) bridged between the fixing member 431 and the multi-array lens AL.
  • the multi-array lens AL (lens portion LP) is movably held at a reference position by a mechanism member such as a fixing member 431 and a link member 432.
  • the four link members 432 may be configured by members having the same shape (stiffness is a rod-like member in this modification) that is rigid and suppressed from being bent, and the cross-sectional shape thereof is a flat plate, a circle, an ellipse, or the like. There is no particular limitation.
  • Two link members 432 are arranged at positions sandwiching the multi-array lens AL from the ⁇ Z direction.
  • the two link members 432 arranged on the + Z direction side of the multi-array lens AL are arranged in parallel at different positions along the X direction, and similarly, the two link members 432 arranged on the ⁇ Y direction side of the multi-array lens AL.
  • the link members 432 are also arranged in parallel at different positions along the X direction. Of the two link members 432 on both sides in the ⁇ Z direction, the link members 432 positioned on the + X side and the link members 432 positioned on the ⁇ X side are arranged at the same position in the X direction.
  • the connecting member 433 is a member for rotatably connecting each link member 432 to the multi-array lens AL and the fixing member 431.
  • an elastic hinge, a coil spring, or the like is used.
  • Each link member 432 is connected by two connecting members 433 so that the fixed member 431 side is a fixed end and the multi-array lens AL side is a free end. Further, the connection position is symmetric on the ⁇ Z side of the multi-array lens AL. With this configuration, the link mechanism 43 can hold the multi-array lens AL so that it can be driven well along the X direction.
  • a voltage is applied to the first electrode 51a and the second electrode 51b of the conducting wire 51 by the power supply unit, and the actuator 5I (similar to the actuator 5H) is driven to The array lens AL is driven along the X direction.
  • the imaging device 1I according to the present modification uses the parallel link mechanism 43 as the movable holding portion 4I, the multi-array lens AL can be driven better along the X direction.
  • the movable holding unit includes various types of holdings that guide the displacement direction of the multi-array lens AL in a predetermined direction, such as an aspect (this modification) including a mechanism member in addition to the configuration including the elastic member described above.
  • a mechanism can be employed.
  • a part of the movable holding portion 4H (four link members 432) is arranged so as to pass through the effective inter-optical region L3, similarly to the imaging apparatuses 1 and 1A to 1H. (FIG. 31), the maintenance of the imaging accuracy, the suppression of the enlargement of the apparatus, and the securing of the driving range of the multi-array lens AL can be achieved at the same time.
  • the relative position of the four link members 432 with respect to the multi-array lens AL changes by driving the actuator 5I.
  • FIG. 32 is a top view schematically showing main components of the imaging apparatus 1J according to the present modification.
  • 33 and 34 are side views of the imaging apparatus 1J as seen from the II cross section of FIG.
  • the movable holding portion 4J Similar to the movable holding portion 4H, the movable holding portion 4J has two upper line springs 414 and two underline springs, and the multi-array lens AL is set to the reference position only by the holding force without having a bias force along the Z direction. (FIGS. 33 and 34).
  • the actuator 5J is a rod-shaped member extending in the X direction, and the + X side end portion 581a thereof is fixed to the side wall 3.
  • the actuator 5J is a rod-shaped member extending in the X direction and the + X side end portion 582a thereof is -X of the piezoelectric element. It has a friction member 582 fixed to the side end portion 581b, a conducting wire 51 for energizing the piezoelectric element 581 and a power source portion (not shown), and the multi-array lens AL (lens portion LP) is arranged along the X direction. This is a so-called piezoelectric actuator that can be driven linearly.
  • the ⁇ X side end 582b of the friction member 582 is in contact with the upper surface of the multi-array lens AL. Therefore, the actuator 5J is driven (the piezoelectric element 581 is energized), and the piezoelectric element 581 is expanded and contracted along the X direction according to the energization amount, thereby utilizing the frictional force between the friction member 582 and the multi-array lens AL.
  • the multi-array lens AL can be driven along the X direction from the reference position (FIG. 33).
  • FIG. 34 shows the imaging device 1J in which the multi-array lens AL is driven in the ⁇ X direction by driving the actuator 5J.
  • the imaging apparatus 1J of the present modified example as well, like the imaging apparatuses 1 and 1A to 1H, by disposing a part of the movable holding portion 4H in the effective inter-optical region L3, it is possible to maintain imaging accuracy and prevent the apparatus from becoming large. Can be achieved at the same time.
  • the imaging apparatus 1K of the third embodiment has a single lens 8 (FIGS. 35 and 36) in addition to the multi-array lens AL as its lens portion LP, and the target to be driven by the actuator 5K is not a multi-array lens AL but a single lens. 8 is different from the imaging devices 1, 1A to 1J described above.
  • FIG. 35 is a side view of the imaging device 1K viewed from the XZ plane.
  • FIG. 36 is a side view of the imaging device 1K viewed from the JJ cross section of FIG.
  • FIG. 36 also shows a plurality of unit imaging light beams IR that pass through the multi-array lens AL and an outgoing light beam OR that is incident on the plurality of unit imaging light beams IR and emitted from the single lens 8.
  • the imaging device 1K includes, as a lens portion LP, a multi-array lens AL disposed in a window WD portion and coupled to a side wall 3 (an inner wall portion of the frame body FL), and a movable holding portion. 4K and the actuator 5K, and the single lens 8 held in the hollow space L1 (the space surrounded by the inner wall portions of the multi-array lens AL and the frame body FL).
  • the measurement light incident on the imaging device 1K through the window WD is received by the imaging device 6 through the multi-array lens AL and the single lens 8 in this order.
  • the single lens 8 (lens portion LP) is optically arranged in series with the multi-array lens AL and functions as a predetermined optical element that cooperates optically with the multi-array lens AL.
  • the lens holder LH2 for holding the single lens 8 is provided on the outer edge of the single lens 8 in the XY plan view.
  • the lens holder LH ⁇ b> 2 is an annular member whose outer edge and inner edge are substantially circular in an XY plan view, and whose inner edge is a member such as a resin bonded to the outer edge of the single lens 8.
  • an integrated configuration in which the outer edge of the single lens 8 and the inner edge of the lens holder LH2 are bonded together is referred to as “lens unit LU2”.
  • the movable holding part 4K has two linear upper plate springs 413 and two lower plate springs 423, similarly to the movable holding part 4C.
  • the two upper leaf springs 413 are bridged between the side wall 3 and the upper surface of the single lens 8
  • the two lower leaf springs 423 are bridged between the sidewall 3 and the lower surface of the lens holder LH2.
  • the movable holding portion 4K holds the lens unit LU2 (and the two magnets 551 connected to the side surface of the lens unit LU2) at the reference position only by the holding force by a total of four leaf springs. This is because the actuator 5K in the third embodiment does not use the elastic force change due to the phase transformation like the SMA actuator, and it is not necessary to apply a bias force to the actuator at the reference position.
  • the actuator 5K uses the VCM mechanism 55 in the same manner as the actuator 5G described above. Therefore, by applying a current to the two coils 552, the displacement force along the optical axis direction (Z direction) is applied to the two magnets 551 (and the lens unit LU2 coupled thereto) by the principle of a so-called linear motor using electromagnetic force. Can be granted. For this reason, if the VCM mechanism 55 is activated by applying a current to the two coils 552 and the displacement force is applied to the lens unit LU2, the single lens 8 is brought into the spring force of the movable holding portion 4K according to the displacement force. In contrast, it is driven along the + Z direction.
  • the multi-array lens AL is coupled to the side wall 3 (inner wall portion of the frame body FL) and fixed, while the single lens 8 is moved to the optical axis (Z by the movable holding unit 4 and the actuator 5K. (Axis) is drivable along the direction. For this reason, zoom adjustment and focus adjustment of the image pickup apparatus 1K are realized by driving the single lens 8 by the actuator 5K.
  • the movable unit that holds the lens unit LU2 (a part of the lens portion LP).
  • the mode of driving the single lens 8 that is a part of the lens portion LP out of the lens portion LP including the multi-array lens AL and the single lens 8 has been described.
  • the present invention can be applied to a case where a single lens is fixed and a multi-array lens is driven and displaced, or a case where the entire composite lens portion is driven and displaced, for a lens portion in which an array lens and a single lens are combined. Is applicable.
  • the present invention can also be applied to a lens portion having a plurality of multi-array lenses without a single lens.
  • imaging devices 1 and 1A to 1M according to the first to third embodiments and the modifications thereof have been described above. However, these are examples of the preferred embodiments of the present invention, and the scope of the present invention is not limited. It is not limited. Within the scope of the invention, the present invention can be freely combined with each embodiment, modified with any component in each embodiment, or omitted with any component in each embodiment.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lens Barrels (AREA)

Abstract

Selon l'invention, une partie lentille (LP) d'un dispositif d'imagerie (1), possède un réseau multi-lentilles (AL) formé par alignement d'une pluralité de lentilles unitaires (LE). Une partie d'une partie soutien mobile (4) soutenant le réseau multi-lentilles (AL) de manière à permettre son déplacement de manière réversible depuis une position de référence, est placée de manière à passer à l'intérieur d'un intervalle d'alignement spatial (région entre lumières actiniques (L3)) d'une pluralité de faisceaux d'imagerie unitaires (IR) passant individuellement au travers de la pluralité de lentilles unitaires (LE). La partie soutien mobile (4) n'étant pas présente à l'intérieur de régions de lumière actinique (L2) du réseau multi-lentilles (AL), il n'y a aucune conséquence sur les faisceaux d'imagerie unitaires, et la précision d'imagerie est préservée. Enfin, il est possible de réduire un espacement dans lequel est placée la partie soutien mobile (4) dans une région hors lumières actiniques (L4) du réseau multi-lentilles (AL), et la dimension du dispositif n'est donc pas augmentée.
PCT/JP2014/065581 2013-07-11 2014-06-12 Dispositif d'imagerie WO2015005056A1 (fr)

Applications Claiming Priority (2)

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JP2013-145155 2013-07-11
JP2013145155 2013-07-11

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WO2015005056A1 true WO2015005056A1 (fr) 2015-01-15

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WO2016158957A1 (fr) * 2015-03-30 2016-10-06 株式会社ニコン Dispositif imageur, appareil de prise de vues à plusieurs objectifs, et procédé de fabrication d'un dispositif imageur
CN107223331A (zh) * 2015-08-19 2017-09-29 弗劳恩霍夫应用研究促进协会 多孔径成像设备、成像系统及用于提供多孔径成像设备的方法
CN108432225A (zh) * 2015-10-21 2018-08-21 弗劳恩霍夫应用研究促进协会 包括多孔径成像装置的装置、用于制造其的方法和用于检测全视场的方法
CN108431661A (zh) * 2015-08-19 2018-08-21 弗劳恩霍夫应用研究促进协会 多孔径成像设备及其制造方法以及成像系统
US10652438B2 (en) 2016-01-13 2020-05-12 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Multi-aperture imaging devices, methods for producing same and imaging system

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WO2006126545A1 (fr) * 2005-05-24 2006-11-30 Matsushita Electric Industrial Co., Ltd. Module d’appareil photographique
JP2010074502A (ja) * 2008-09-18 2010-04-02 Konica Minolta Holdings Inc 駆動装置および撮像装置

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WO2006126545A1 (fr) * 2005-05-24 2006-11-30 Matsushita Electric Industrial Co., Ltd. Module d’appareil photographique
JP2010074502A (ja) * 2008-09-18 2010-04-02 Konica Minolta Holdings Inc 駆動装置および撮像装置

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JPWO2016158957A1 (ja) * 2015-03-30 2018-02-01 株式会社ニコン 撮像装置、マルチレンズカメラおよび撮像装置の製造方法
WO2016158957A1 (fr) * 2015-03-30 2016-10-06 株式会社ニコン Dispositif imageur, appareil de prise de vues à plusieurs objectifs, et procédé de fabrication d'un dispositif imageur
CN107407852A (zh) * 2015-03-30 2017-11-28 株式会社尼康 拍摄装置、多透镜相机及拍摄装置的制造方法
CN108431661A (zh) * 2015-08-19 2018-08-21 弗劳恩霍夫应用研究促进协会 多孔径成像设备及其制造方法以及成像系统
JP2018510368A (ja) * 2015-08-19 2018-04-12 フラウンホーファー−ゲゼルシャフト・ツール・フェルデルング・デル・アンゲヴァンテン・フォルシュング・アインゲトラーゲネル・フェライン 多開口撮像デバイス、撮像システム、および多開口撮像デバイスを提供する方法
CN107223331A (zh) * 2015-08-19 2017-09-29 弗劳恩霍夫应用研究促进协会 多孔径成像设备、成像系统及用于提供多孔径成像设备的方法
CN108431661B (zh) * 2015-08-19 2021-07-30 弗劳恩霍夫应用研究促进协会 多孔径成像设备及其制造方法以及成像系统
JP2018532143A (ja) * 2015-08-19 2018-11-01 フラウンホッファー−ゲゼルシャフト ツァ フェルダールング デァ アンゲヴァンテン フォアシュンク エー．ファオ マルチ開口撮像装置、マルチ開口撮像装置の製造方法および撮像システム
JP7174005B2 (ja) 2015-08-19 2022-11-17 フラウンホッファー－ゲゼルシャフト ツァ フェルダールング デァ アンゲヴァンテン フォアシュンク エー．ファオ マルチ開口撮像装置、マルチ開口撮像装置の製造方法および撮像システム
US10291852B2 (en) 2015-08-19 2019-05-14 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Multi-aperture imaging device, imaging system and method for providing a multi-aperture imaging device
JP7030048B2 (ja) 2015-08-19 2022-03-04 フラウンホッファー－ゲゼルシャフト ツァ フェルダールング デァ アンゲヴァンテン フォアシュンク エー．ファオ マルチ開口撮像装置、マルチ開口撮像装置の製造方法および撮像システム
JP2020129112A (ja) * 2015-08-19 2020-08-27 フラウンホッファー−ゲゼルシャフト ツァ フェルダールング デァ アンゲヴァンテン フォアシュンク エー．ファオ マルチ開口撮像装置、マルチ開口撮像装置の製造方法および撮像システム
CN107223331B (zh) * 2015-08-19 2020-08-28 弗劳恩霍夫应用研究促进协会 多孔径成像设备、成像系统及用于提供多孔径成像设备的方法
JP7029958B2 (ja) 2015-08-19 2022-03-04 フラウンホーファー－ゲゼルシャフト・ツール・フェルデルング・デル・アンゲヴァンテン・フォルシュング・アインゲトラーゲネル・フェライン 多開口撮像デバイス、撮像システム、および多開口撮像デバイスを提供する方法
CN108432225A (zh) * 2015-10-21 2018-08-21 弗劳恩霍夫应用研究促进协会 包括多孔径成像装置的装置、用于制造其的方法和用于检测全视场的方法
US11016273B2 (en) 2015-10-21 2021-05-25 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Device comprising a multi-aperture imaging device, method for producing same and method for capturing a total field of view
CN108432225B (zh) * 2015-10-21 2021-09-03 弗劳恩霍夫应用研究促进协会 包括多孔径成像装置的装置、用于制造其的方法和用于检测全视场的方法
JP2021043455A (ja) * 2015-10-21 2021-03-18 フラウンホッファー−ゲゼルシャフト ツァ フェルダールング デァ アンゲヴァンテン フォアシュンク エー．ファオ チャネル特有の調整可能性を有するマルチ開口撮像装置、マルチ開口撮像装置の製造方法および全視野の取込み方法
US11474331B2 (en) 2015-10-21 2022-10-18 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Device comprising a multi-aperture imaging device, method for producing same and method for capturing a total field of view
JP2018536892A (ja) * 2015-10-21 2018-12-13 フラウンホッファー−ゲゼルシャフト ツァ フェルダールング デァ アンゲヴァンテン フォアシュンク エー．ファオ チャネル特有の調整可能性を有するマルチ開口撮像装置、マルチ開口撮像装置の製造方法および全視野の取込み方法
US10652438B2 (en) 2016-01-13 2020-05-12 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Multi-aperture imaging devices, methods for producing same and imaging system

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