WO2014021092A1 - Unité d'élément optique et dispositif de capture d'image - Google Patents

Unité d'élément optique et dispositif de capture d'image Download PDF

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Publication number
WO2014021092A1
WO2014021092A1 PCT/JP2013/069264 JP2013069264W WO2014021092A1 WO 2014021092 A1 WO2014021092 A1 WO 2014021092A1 JP 2013069264 W JP2013069264 W JP 2013069264W WO 2014021092 A1 WO2014021092 A1 WO 2014021092A1
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WO
WIPO (PCT)
Prior art keywords
optical element
unit
imaging
element unit
displacement amount
Prior art date
Application number
PCT/JP2013/069264
Other languages
English (en)
Japanese (ja)
Inventor
立山忠生
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
Priority to JP2014528066A priority Critical patent/JPWO2014021092A1/ja
Publication of WO2014021092A1 publication Critical patent/WO2014021092A1/fr

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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
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/02—Bodies
    • G03B17/12—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets
    • 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
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/02—Bodies
    • G03B17/17—Bodies with reflectors arranged in beam forming the photographic image, e.g. for reducing dimensions of camera
    • 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
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/56—Accessories
    • G03B17/565—Optical accessories, e.g. converters for close-up photography, tele-convertors, wide-angle convertors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components
    • H04M1/0264—Details of the structure or mounting of specific components for a camera module assembly

Definitions

  • the present invention relates to an optical element unit and an imaging device, and more particularly to an optical element unit and an imaging device that are mounted in front of a master lens provided in the imaging device or the like.
  • a portable terminal such as smartphones have been released and are expanding rapidly.
  • Such a portable terminal is generally mounted with an imaging device, and is used in various ways such as transferring an image captured by the imaging device or performing image processing on the portable terminal.
  • an imaging device incorporated therein is strictly required to be compact. For this reason, there are many portable terminals equipped with a wide-angle single-focus optical system, and some users have various demands such as wanting to take a wider image or taking a larger image of a distant subject.
  • Patent Document 1 a conversion lens unit that can be attached to a mobile phone with an imaging function and can perform imaging with a different angle of view
  • the conversion lens unit is arranged along the front surface of the mobile terminal, and the optical path is bent using a reflective optical element such as a prism, so that the entire length when attached to the mobile terminal is secured while ensuring a long optical axis length.
  • the bending-type conversion lens unit has been studied in which the length in the front-rear direction is shortened, that is, the thickness direction is thin, and the handleability is excellent.
  • the image pickup surface of a general image pickup device is rectangular, and there is a difference in dimension between the short side length (the same applies to the long side length) and the diagonal length.
  • the lens diameter increases, the diameter of the light beam passing therethrough also increases, and the incident prism increases in size.
  • the conversion lens unit is increased in size in this way, light rays (unused light rays) exceeding a short side length shorter than the diagonal length of the image sensor are not used for imaging, and the amount is wasted. Therefore, a conversion lens unit that has been made slimmer by reducing the portion of the optical element through which unused light passes has been developed.
  • FIGS. 17 (a) and 17 (c) are front views showing a state where a conversion lens unit with a cover omitted is attached to a portable terminal as an imaging device
  • FIGS. 17 (b) and 17 (d) are FIGS. (A) Corresponding to (c), it is a diagram showing an optical axis orthogonal cross-sectional profile of light emitted from the image side surface of the image side prism PS2 which is a reflective optical element.
  • FIG. 18 is a perspective view showing a state where a conversion lens unit with a cover omitted is attached to a portable terminal as an imaging device.
  • the conversion lens unit includes an image side prism PS2 close to the master lens ML, an object side prism PS1 provided on the object, and a variable power lens group GR disposed between the prisms PS1 and PS2.
  • the optical axis of the master lens ML is OZ
  • the optical axis of the zoom lens group GR is OX.
  • the optical axis OX bent by the image side prism PS2 is referred to as a bent optical axis in this specification. It is assumed that the optical axis OZ and the optical axis OX intersect on the reflection surface of the image side prism PS2.
  • the imaging surface of the imaging element has a rectangular shape having a short side and a long side.
  • the cross-sectional outline SH of the light beam in the direction orthogonal to the optical axis has a rectangular shape having a short side in the X-axis direction and a long side in the Y-axis direction.
  • FIG. 17A when the optical axis OX is parallel to the X axis, as shown in FIG. 17B, the direction orthogonal to the optical axis of the outgoing light beam in the image side surface PS2a of the image side prism PS2.
  • the cross-sectional outline SH is accommodated.
  • FIG. 17C when the optical axis OX is inclined by an angle ⁇ with respect to the X axis (the phase is shifted), the light beam from the variable magnification lens group GR is transmitted to the image side prism PS2. Rotating on the reflecting surface, as shown in FIG.
  • the existing conversion lens unit as shown in Patent Document 1 has a cylindrical shape that is attached to the object side of the master lens on the mobile phone side, and the lens to be used is basically circular. Even if the phase is shifted, the image is not cut, and the resolution around the screen is not lowered due to the point-symmetrical shape.
  • the present invention has been made in view of such problems, and an optical element unit and an imaging device that can ensure compactness when attached to an imaging apparatus while preventing image vignetting and suppressing a reduction in resolution around the screen.
  • An object is to provide an apparatus.
  • the optical element unit according to claim 1 is attachable to an imaging device having a master lens, includes at least a reflective optical element that bends the light beam, and is orthogonal to the optical axis of the light beam emitted from the reflective optical element to the image side.
  • An optical element unit having a directional cross-sectional outer shape having two sides parallel to a bending optical axis from the reflective optical element toward the object side, Unit optical axis alignment means for positioning the optical axis of the master lens and the bent optical axis so as to intersect each other on the reflective surface of the reflective optical element;
  • Unit adjustment means for adjusting the phase of the bending optical axis around the optical axis of the master lens by relatively displacing the imaging device and the optical element unit.
  • the unit adjusting means causes the image pickup device and the optical element unit to be relatively displaced.
  • the phase of the optical axis on the object side of the reflective optical element around the optical axis of the master lens is adjusted, so that the subject light beam is emitted from the image side surface of the reflective optical element.
  • the reflective optical element can be suppressed to a minimum size without causing vignetting, and the optical element unit can be made compact without causing a reduction in resolution around the screen.
  • the “imaging device” refers to a device having at least a master lens, an imaging element, and a body that accommodates them. Examples of the “imaging device” include a mobile terminal such as a mobile phone and a smartphone. Further, “positioning so that the optical axes cross each other” only needs to be positioned so that the optical axes are close enough to perform appropriate imaging, and it is not necessary to strictly match the optical axes.
  • the optical element unit according to claim 2 is characterized in that, in the invention according to claim 1, the optical element unit has a variable power lens group disposed on the bent optical axis.
  • the “magnifying lens group” refers to a lens that changes the shooting angle of view by being arranged along the optical axis of the master lens, and includes all of a teleconversion lens, a wide conversion lens, and a zoom conversion lens.
  • the optical element unit according to claim 3 is characterized in that in the invention according to claim 1 or 2, the optical element unit has unit recording means for recording an adjustment amount to be adjusted by the unit adjustment means.
  • the optical element unit and the imaging device There are generally individual differences between the optical element unit and the imaging device. For example, when an optical element unit and an image pickup apparatus are sold as a set, the optical element unit attached to the image pickup apparatus is uniquely determined, and the amount adjusted by the unit adjusting means at that time is always constant. Therefore, for example, when the unit recording means records the adjustment amount to be adjusted by the unit adjustment means at the time of factory shipment, when attaching the optical element unit to the imaging device, a sales clerk or user can Based on the adjustment amount, optimum adjustment can be performed by the unit adjusting means.
  • optical element unit according to a fourth aspect of the invention is characterized in that, in the invention according to any one of the first to third aspects, the unit adjusting means is provided so as to be accessible by a user.
  • optical element unit according to claim 5 is characterized in that, in the invention according to any one of claims 1 to 3, the unit adjusting means is provided so that a user cannot access it.
  • the unit adjusting means is provided so that the user cannot access so that only an engineer accustomed to the work can adjust the phase.
  • the optical element unit according to claim 6 is the invention according to any one of claims 1 to 5, wherein the unit adjusting means includes a fitting portion into which at least a part is fitted into the concave portion of the imaging device, and the fitting portion.
  • the unit adjusting means includes a fitting portion into which at least a part is fitted into the concave portion of the imaging device, and the fitting portion.
  • the optical element unit is relatively displaced with respect to the imaging device by being screwed.
  • the optical element unit can be relatively displaced with respect to the imaging device by screwing the screw member with respect to the fitting portion, fine adjustment can be performed with high accuracy while having a simple configuration. It can be done easily.
  • an earphone jack can be used when the imaging apparatus is a portable terminal, but not limited thereto, a shim card insertion slot, a memory card insertion slot, or the like may be used.
  • the optical element unit according to claim 7 is characterized in that, in the invention according to claim 6, the housing of the optical element unit and the plate material are separable.
  • the optical element unit When performing normal imaging using only the master lens in the imaging apparatus, it may be desirable to remove the optical element unit because it interferes. In such a case, readjustment when the optical element unit is attached again is troublesome. Therefore, by making the optical element unit separable from the plate material, it is possible to remove only the optical element unit while leaving the plate material whose phase adjustment is completed on the imaging device side. In such a case, when the optical element unit is attached to the imaging device again, the optical element unit can be always attached at the adjusted position by being attached via the plate member.
  • optical element unit according to claim 8 is characterized in that, in the invention according to claim 6, the casing of the optical element unit and the plate member are not separable.
  • An optical element unit is the invention according to any one of the sixth to eighth aspects, wherein the plate member includes two hinged and foldable plates, and one plate is the screw A member is fixed to the imaging device, and the other plate is a part of the housing of the optical element unit.
  • the hinge By folding the hinge, the reflective optical element of the optical element unit can be retracted from the optical axis of the master lens, so that normal imaging using only the master lens can be performed.
  • the hinge is returned to the original position so that the reflective optical element of the optical element unit bends the optical axis of the master lens. Since it is fixed to the imaging device by the screw member in the adjusted state, it is not necessary to readjust, so that labor can be saved.
  • the image pickup apparatus includes unit recording means for recording a relative displacement amount between the image pickup element of the image pickup apparatus and the optical element unit when the phase is adjusted by the unit adjustment means.
  • An imaging apparatus attached to the optical element unit according to any one of claims 1 to 9, The imaging apparatus includes: a determination unit that determines that the optical element unit is attached to the imaging apparatus; a displacement amount detection unit that detects a relative displacement amount between the imaging element and the optical element unit; and the determination unit. When it is determined that the optical element unit is attached to the imaging device, the relative displacement amount recorded in the unit recording means is read out, and the current relative displacement amount detected by the displacement amount detection means And an imaging control means for prohibiting imaging when the difference between the adjustment amounts exceeds a predetermined value.
  • the image pickup element and the optical element unit may be displaced relative to each other from an initial value. If this is overlooked, image vignetting may occur. There is. Therefore, when the determination unit determines that the optical element unit is attached to the imaging apparatus, the calculation unit reads the relative displacement amount recorded in the unit recording unit and detects the displacement amount. The difference with the current relative displacement amount detected by the means is obtained, and when the difference exceeds a predetermined value, the image pickup control means can prohibit the image pickup. Imaging can be avoided.
  • the imaging control means includes a prohibit mode for prohibiting imaging when the difference in the relative displacement amount exceeds a predetermined value, and the relative One of the permission modes for permitting imaging can be set regardless of the difference in displacement amount.
  • the imaging control means sets the permission mode, imaging is permitted regardless of the difference in the relative displacement amount, so that the possibility of missing a release chance can be avoided.
  • the imaging device includes at least a reflective optical element that bends a light beam, and an optical axis orthogonal cross-sectional outer shape of the light beam emitted from the reflective optical element toward the image side is bent toward the object side from the reflective optical element.
  • An imaging device capable of mounting an optical element unit having two sides parallel to the optical axis, An image sensor; A master lens disposed on the image side of the image sensor; A body optical axis aligning means for positioning the optical axis of the master lens so as to intersect the optical axis of bending on the reflecting surface of the reflective optical element; Driving means for relatively displacing the imaging element and the optical element unit; And a main body adjusting means for adjusting the phase of the bending optical axis around the optical axis of the master lens by controlling the driving means.
  • the bending optical axis around the optical axis of the master lens is obtained by relatively displacing the imaging element and the optical element unit by the body adjusting means drivingly controlling the driving means. Therefore, the reflective optical element can be suppressed to a minimum size without causing vignetting when the subject light beam is emitted from the image side surface of the reflective optical element. Thus, the optical element unit can be made compact without degrading the resolution around the screen.
  • main body recording for recording a relative displacement amount between the imaging element and the optical element unit when the phase is adjusted by the main body adjusting means.
  • Means a determination means for determining that the optical element unit is attached to the imaging device, a displacement amount detection means for detecting a relative displacement amount between the imaging element and the optical element unit, and the determination means, When it is determined that the optical element unit is attached to the image pickup device, the difference between the current relative displacement amount detected by the displacement amount detection unit and the relative displacement amount recorded in the main body recording unit is calculated. And an imaging control unit that prohibits imaging when the difference between the adjustment amounts exceeds a predetermined value.
  • the image pickup element and the optical element unit may be displaced relative to each other from an initial value. If this is overlooked, image vignetting may occur. is there. Therefore, when the determination unit determines that the optical element unit is attached to the imaging apparatus, the calculation unit detects the current imaging element and the optical element detected by the displacement amount detection unit. Since the difference between the relative displacement amount with respect to the unit and the relative displacement amount recorded in the main body recording means is obtained and the difference exceeds a predetermined value, the imaging control means can prohibit imaging. Inappropriate imaging that causes vignetting can be avoided.
  • the main body adjustment unit is configured such that the relative displacement amount detected by the displacement amount detection unit and the relative recording amount recorded in the main body recording unit.
  • the drive means is controlled to reduce the difference from the displacement amount.
  • the main body adjusting means can drive and control the driving means so that the difference in the relative displacement amount is automatically reduced without adjusting by the user himself / herself. Absent.
  • the imaging apparatus according to claim 15 is the invention according to claim 13 or 14, wherein the imaging control means includes a prohibit mode for prohibiting imaging when the difference in the relative displacement amount exceeds a predetermined value; It is possible to set one of permission modes for permitting imaging regardless of the difference in the relative displacement amount.
  • the imaging control means sets the permission mode, imaging is permitted regardless of the difference in the relative displacement amount, so that the possibility of missing a release chance can be avoided.
  • An imaging apparatus includes the determination means according to the inventions according to the twelfth to fifteenth aspects, the determination means determining whether the optical element unit is attached to the imaging apparatus, and the display means, When the means determines that the optical element unit is attached to the imaging apparatus, the adjustment amount recorded in the recording means is displayed on the display means.
  • an optical element unit and an imaging apparatus capable of ensuring compactness when attached to an imaging apparatus while enabling appropriate image capturing.
  • (A) is a front view of the portable terminal which is an imaging device
  • (b) is a rear view of a portable terminal
  • (c) is the perspective view seen from diagonally upward of the portable terminal.
  • (A) is a front view of a conversion lens unit
  • (b) is a rear view
  • (c) is a perspective view seen obliquely from above
  • (d) is a perspective view shown in a folded state.
  • FIG. 1 is a front view showing a conversion lens unit attached to a portable terminal in a state where a variable magnification imaging is possible
  • (b) is a rear view
  • (c) is a perspective view seen from diagonally above.
  • (A) is the enlarged view cut
  • (B) is a figure which shows the adjustment pin 250 'concerning a modification.
  • A) is the perspective view which attached the conversion lens unit to the portable terminal, and was seen from the back side diagonally upward
  • (b) is the figure which expands and shows the part
  • (c) is concerning a modification.
  • (A) is a front view showing a state in which a conversion lens unit attached to a mobile terminal is flipped up so that normal imaging is possible
  • (b) is a rear view
  • (c) is a perspective view as seen from diagonally above. It is. It is a figure which shows the conversion lens unit and portable terminal concerning 2nd Embodiment, and has shown that the conversion lens unit can be removed.
  • (A) is a figure which decomposes
  • (b) is a figure shown in the assembled state. It is the enlarged view which looked at a part of back cover of the conversion lens unit from the front.
  • (A) is a perspective view which shows the state which attached the conversion lens unit 200 concerning 4th Embodiment to the portable terminal 100 via the cover 300, (b) covers the conversion lens unit 200. It is a perspective view which shows the state removed from the portable terminal 100 with 300, (c) is a perspective view which shows the cover 300 alone.
  • (A) is sectional drawing which cut
  • (B) is an enlarged view of a portion indicated by an arrow B in (a).
  • (A) is a perspective view which shows the state which attached the conversion lens unit 200 concerning 5th carrying to the portable terminal 100 via cover 300 '
  • (b) is a cover 300' single-piece
  • (A) shows a state in which the phase of the bending optical axis is adjusted, and (b) shows a cross-sectional profile in the direction orthogonal to the optical axis of the light beam emitted from the reflective optical element to the image side in the state in which the bending optical axis is adjusted.
  • (C) shows a state in which the phase of the bent optical axis is deviated, and (d) is a direction orthogonal to the optical axis of the light beam emitted from the reflective optical element to the image side with the bent optical axis deviated. It is a figure which shows a cross-sectional external shape. It is a perspective view shown in the state where the conversion lens unit which abbreviate
  • FIG. 1 is a diagram illustrating a single mobile terminal as an imaging apparatus.
  • FIG. 2 is a diagram illustrating a conversion lens unit which is an example of an optical element unit.
  • FIG. 3 is a diagram illustrating a housing of the conversion lens unit with a dotted line in a state where the conversion lens unit is attached to the portable terminal.
  • FIG. 4 is a diagram showing only the optical system of the portable terminal and the conversion lens unit.
  • the mobile terminal 100 shown in FIG. 1 has a thin body 101 that is rectangular.
  • a circular opening 101a is formed on the front surface of the body 101, and an annular convex portion 101b is formed around the circular opening 101a so as to protrude from the front surface.
  • the mobile terminal 100 includes a master lens ML and an image sensor CMOS in the body 101 (see FIG. 3).
  • the center of the circular opening 101a is accurately positioned with respect to the optical axis of the master lens.
  • a magnet 101c is attached to the front surface of the body 101 adjacent to the circular opening 101a.
  • a monitor 102 On the back surface of the body 101 , a monitor 102 as a display means is provided.
  • the conversion lens unit 200 shown in FIG. 2 includes a back cover 201a that is an iron-based metal flat plate, a box-shaped front cover 201b that covers the back cover 201a, and a first plate 201c that is attached to the upper surface of the front cover 201b.
  • a housing 201 is provided.
  • the first plate 201c is connected to the second plate 201e via a hinge 201d so as to be foldable.
  • a circular opening 201f is formed near the end of the second plate 201e, and an adjustment pin 250, which will be described in detail later, is fitted into the opening 201f.
  • An object-side circular opening 201g is formed on the front surface of the front cover 201b, and an image-side circular opening 201h is formed on the back cover 201a.
  • the inner diameter of the image-side circular opening 201 h is the same as the outer diameter of the annular convex portion 101 b provided in the mobile terminal 100.
  • the image side circular opening 201h constitutes a unit optical axis aligning means, and the annular convex portion 101b constitutes a main body optical axis aligning means.
  • a long hole 201i is formed in the front surface of the front cover 201b, and a switch 201j that can move along the long hole 201i is provided.
  • the switch 201j is operated to move a part of the zoom lens group GR in the optical axis direction via a drive mechanism (not shown) provided in the housing 201, thereby realizing a macro imaging function. It is.
  • the object side lens L1 in order from the object side, the object side lens L1, the first prism PS1, the variable power lens group GR, the second prism (opposite to the object side circular opening 201g)
  • a master lens ML and an image sensor CMOS are arranged in this order so as to face the image side lens L2.
  • the image sensor CMOS is arranged vertically (the Y-axis direction is the long side), and therefore, in order to make it thin, the short side direction as shown in FIG.
  • some lenses of the variable magnification lens group GR are cut to reduce the size.
  • the light beam passing through the conversion lens CL has a rectangular shape in an arbitrary cross section in the direction perpendicular to the optical axis, corresponding to the imaging surface of the imaging device CMOS.
  • the imaging surface of the imaging device CMOS has a short side parallel to the X-axis direction of the mobile terminal 100 and a long side parallel to the Y-axis direction. Therefore, as shown in FIG.
  • the second prism PS2 can be reduced in size, and the conversion lens CL can be reduced in size by, for example, I-cutting a part of the lenses of the variable magnification lens group GR.
  • the conversion lens unit 200 is attached to the portable terminal 100 by fitting the image side circular opening 201h of the conversion lens unit 200 to the annular convex portion 101b of the portable terminal 100 and further attracting the back cover 201a to the magnet 101c of the body 101. Can be attached.
  • FIG. 5 is a diagram showing the conversion lens unit 200 attached to the portable terminal 100.
  • the optical axis OZ of the master lens ML intersects the optical axis OX of the zoom lens group GR with high accuracy on the reflecting surface of the second prism PS2, but the light of the master lens ML Around the axis, the phase of the optical axis of the variable magnification lens group GR is not fixed.
  • the second prism PS2 and the like are miniaturized corresponding to light rays having a diagonal length L of an arbitrary cross section larger than a short side length H. Therefore, as shown in FIG.
  • the phase of the optical axis of the variable magnification lens group GR is shifted from the X-axis direction, the light beam emitted from the image side surface PS2a of the second prism PS2 is shown in FIG.
  • the image side surface PS2a protrudes, so-called vignetting may occur, and an appropriate subject image may not be formed on the imaging surface of the image sensor CMOS. Therefore, in the present embodiment, as shown in FIG. 17A, the phase of the optical axis of the variable power lens group GR around the optical axis of the master lens ML is adjusted as follows (the optical axis OX is set to X). Aligned with the axis). As a result, as shown in FIG. 17B, the light beam emitted from the image side surface of the second prism PS2 falls within the image side surface of the second prism PS2.
  • FIG. 6 (a) is a view of the configuration of FIG. 5 (b) cut along the VI-VI line and viewed in the direction of the arrow.
  • the adjustment pin 250 is made of metal and has a shaft portion 250a that is an insertion portion and a head screw portion 250b that is a screw member. A plurality of circumferential grooves 250c are formed in the shaft portion 250a at equal intervals. A recess 250d for engaging a tool T such as a screwdriver is formed on the upper surface of the head screw portion 250b. On the other hand, an internal thread is formed in the opening 201f of the second plate 201e.
  • the second plate 201e and the adjustment pin 250 constitute unit adjustment means.
  • the shaft portion 250a When attaching the adjustment pin 250 to the body 101 of the mobile terminal 100, first, the shaft portion 250a is inserted into the recess 104 of the body 101. At this time, when the concave portion 104 is an earphone jack or the like, the circumferential groove 250c of the shaft portion 250a is fitted into an urging member (ball) 104a fixed in the earphone jack, so that it can rotate but is prevented from coming off. Is designed. At this time, a gap ⁇ is formed between the head screw portion 250b and the body 101.
  • the second plate 201e By selecting the rotation direction of the tool T whose tip is engaged with the recess 250d of the head screw portion 250b, the second plate 201e approaches or moves away from the body 101.
  • the conversion lens unit 200 rotates clockwise with respect to the body 101 around the optical axis of the master lens ML.
  • the image side circular opening 201h slides relative to the annular convex portion 101b, the phase adjustment is not hindered.
  • the conversion lens unit 200 rotates counterclockwise with respect to the body 101 about the optical axis of the master lens ML.
  • the phenomenon caused by this is referred to as a change in the phase of the variable power lens group GR around the optical axis of the master lens ML.
  • the phase is zero, and the clockwise rotation is positive.
  • Phase and counterclockwise can be determined as negative phase. As a result, adjustment is performed in a direction in which vignetting is reduced.
  • FIG. 6B is a view showing an adjustment pin 250 ′ according to a modification.
  • the adjustment pin 250 ′ constituting the unit adjusting means includes a base pin 251 that is an insertion portion and a screw member 252 that is a screw member.
  • the base pin 251 is formed of a cylindrical shaft portion 251a made of resin or metal, and a flange portion 251b made of a sponge material bonded to the upper end of the base pin 251.
  • a hole 251c penetrating them in the axial direction is formed. Is formed.
  • the diameter of the shaft portion 251 a is slightly larger than the concave portion 104 of the body 101.
  • the screw member 252 is made of a metal as a raw material, and is formed of a male screw portion 252a and a head portion 252b having a recess with which the tool T can be engaged.
  • the head 252b has a conical shape, and it is preferable that the opening 201f of the corresponding second plate 201e has a conical shape on the upper end side because the head 252b does not protrude from the second plate 201e when attached. . This is because if the adjustment pin 250 ′ is protruding, it may be easily hit and may cause a phase shift or breakage.
  • the adjustment pin 250 ′ of this modification is suitable when the concave portion 104 is a simple cylindrical shape.
  • the shaft portion 251 a of the base pin 251 is inserted into the recess 104 of the body 101.
  • the shaft portion 251 a enters the recess 104 while being elastically deformed, and comes into contact with the inner periphery of the recess 104.
  • the male screw portion 252a of the screw member 252 is inserted into the opening 201f, and further inserted into the hole 251c of the base pin 251, and the tip is screwed into the nut 251d. Combine.
  • the adjustment pin 250 when disassembly is required for inspection of the conversion lens unit 200, the adjustment pin 250 can be pulled out from the recess 104 integrally with the conversion lens unit 200. Since the relationship between the adjustment pin 250 and the second plate 201e does not change, the phase of the optical axis of the variable magnification lens group GR before being pulled out can be reproduced by inserting the adjustment pin 250 into the recess 104 again after inspection.
  • the conversion lens unit 200 may be attached to another portable terminal 100. In this case, the optimum phase of the optical axis of the variable magnification lens group GR is obtained according to the individual difference of the other portable terminal 100. Therefore, the position of the adjustment pin 250 may change. For this reason, when the same conversion lens unit 200 is attached to the original portable terminal 100, it is necessary to readjust the adjustment pin 250, which is troublesome.
  • unit recording means for recording the adjustment amount of the adjustment pin 250 (250 ') is provided.
  • FIG. 7B shows the back side of the portable terminal 100 to which the conversion lens unit 200 is attached.
  • the head screw The marking line LN is formed (marked) so as to extend in the radial direction across the upper surface of the portion 250b (the head portion 252b of the screw member 252) and the second plate 201e.
  • the unit recording means includes the adjustment pin 250 or the head 252b of the screw member 252 and the second plate 201e.
  • the marking line LN formed on the adjustment pin 250 (the head 252b of the screw member 252) is left exposed, the user can visually recognize (access) it, and thus the user can readjust.
  • FIG. 7C shows recording means according to the modification.
  • the scales SC are marked at equal intervals around the opening 201f of the second plate 201e.
  • a mark MK is previously attached to the outer periphery of the upper surface of the adjustment pin 250 (250 ').
  • the operator determines which value the mark MK on the outer periphery of the upper surface of the adjustment pin 250 (250 ′) has in light of the scale SC. Read. In the example of FIG. 7C, the reading is ⁇ 45 ° with zero directly above. Such a value is recorded in a non-volatile memory (not shown) in the portable terminal 100 as a unit recording means or a main body recording means.
  • the operator can screw the adjustment pin 250 (250 ′) so that the reading value ( ⁇ 45 °) read from the nonvolatile memory in the portable terminal 100 is obtained.
  • the phase of the conversion lens unit 200 before the decomposition, that is, at the time of adjustment is obtained.
  • the recorded value may be read by allowing the user to access the nonvolatile memory in response to an input of a password or the like.
  • the conversion lens CL of the conversion lens unit 200 is displayed. Since the subject image is formed on the imaging surface of the image sensor CMOS by the master lens ML and an image signal corresponding to the image is output, the image signal is processed and displayed on the monitor 102 or not shown. Can be saved in internal memory or memory card.
  • the conversion lens unit 200 is flipped up on the body 101 against the magnetic force of the magnet 101c using a hinge as shown in FIG. As a result, the image-side circular opening 201h comes out of the annular convex portion 101b, and the master lens ML is exposed.
  • the release button 103 is pressed with the master lens ML facing the subject (the release button 103 may be pushed indirectly by pressing the conversion lens unit 200), the subject image can be obtained only by the master lens ML. Is imaged on the imaging surface of the imaging device CMOS, and an image can be obtained by the same processing as described above.
  • the adjustment pin 250 is separated from the body 101 when the conversion lens unit 200 is removed.
  • the conversion lens unit 200 can be removed without separating the adjustment pin 250 from the body 101.
  • FIG. 9 is a perspective view showing the conversion lens unit 200 and the portable terminal 100 according to the second embodiment.
  • a single mounting plate (plate material) 301 separate from the conversion lens unit 200 is used.
  • An opening 301f is formed in the vicinity of the end of the aluminum mounting plate 301, and an adjustment pin 250 similar to that of the above-described embodiment can be fitted into the opening 301f.
  • magnets 302 and 303 are provided in parallel on the part side protruding forward of the mounting plate 301.
  • magnets 201m and 201n having opposite polarities N / S
  • the conversion lens unit 200 is uniquely attached to the mounting plate 301 by attracting the magnets 201m and 201n to the magnets 302 and 303, respectively.
  • Other configurations are the same as those of the above-described embodiment.
  • the phase is adjusted using the adjustment pin 250 in a state where the image-side circular opening 201h of the conversion lens unit 200 is fitted to the annular convex portion 101b of the mobile terminal 100. Thereby, variable magnification imaging can be performed.
  • the conversion lens unit 200 can be peeled off from the mounting plate 301 against the magnetic force between the magnets 302 and 303 and the magnets 201m and 201n. As a result, the master lens ML of the mobile terminal 100 is exposed, so that normal imaging can be performed.
  • variable magnification imaging When it is desired to perform variable magnification imaging again, the conversion lens unit 200 is attached to the mounting plate 301 by attracting the magnets 201m and 201n to the magnets 302 and 303, respectively. At this time, the mounting plate 301 remains attached to the mobile terminal 100 and the screw member 252 is not loosened. Therefore, the phase before removal is reproduced only by attaching the conversion lens unit 200 to the mounting plate 301, that is, no adjustment. Thus, variable magnification imaging can be performed.
  • FIG. 10 is a perspective view showing a part of the conversion lens unit 200 and the mobile terminal 100 according to the third embodiment.
  • FIG. 10 only the back cover 201a ′ of the conversion lens unit 200 is shown.
  • FIG. 11 is a view of a part of the back cover 201a ′ as viewed from the front side.
  • the conversion lens unit 200 is directly attached to the body 101 of the mobile terminal 100 without using an attachment plate.
  • the body 101 of the mobile terminal 100 has a magnet 101m in addition to the magnet 101c.
  • the back cover 201a ' is made of aluminum or resin, and magnets 201p and 201q having opposite polarities (N / S) are provided corresponding to the magnets 101c and 101m.
  • an inverted U-shaped upper block 201r is provided at the upper part of the back cover 201a ', and a U-shaped lower block 201s is provided at the lower part of the back cover 201a' immediately below it.
  • An adjustment mechanism 210 as a unit adjustment unit is provided between the upper block 201r and the lower block 201s.
  • the adjustment mechanism 210 includes a screw shaft 211 and a nut member 212.
  • the screw shaft 211 made of stainless steel has a male screw portion 211a at the center and round shafts 211b and 211c having a smaller diameter than the male screw portion 211a at both ends.
  • the round shaft 211b is rotatably fitted in the through hole 201t of the upper block 201r, and the round shaft 211c is rotatably fitted in the through hole 201u of the lower block 201s.
  • the boundary between the male screw portion 211a and the round shafts 211b and 211c is in contact with the upper block 201r and the lower block 201s, and therefore the movement of the screw shaft 211 in the axial direction with respect to the back cover 201a ′ is limited. Yes.
  • a groove for receiving the tool T is formed at the end of the round shaft 211b.
  • the nut member 212 has a female screw hole 212a penetrating vertically, and an opening 212b for holding the magnet 201q at the center.
  • the nut member 212 is attached to the back cover 201a 'via the screw shaft 211 by screwing the male screw portion 211a into the female screw hole 212a.
  • Other configurations are the same as those of the above-described embodiment.
  • the conversion lens unit 200 When the conversion lens unit 200 is attached, the conversion lens unit 200 is uniquely attached to the body 101 by attracting the magnets 201p and 201q to the magnets 101c and 101m, respectively.
  • the magnet 201q is attracted and fixed to the magnet 101m, and the screw shaft 211 is restricted from moving relative to the back cover 201a ′.
  • the screw shaft 211 pushes out the upper block 201r or the lower block 201s.
  • the back cover 201a ′ is displaced relative to the body 101 (in this case, in the vertical direction). Thereby, the phase can be adjusted.
  • FIG. 12A is a perspective view showing a state in which the conversion lens unit 200 is attached to the portable terminal 100 via the cover 300 according to the fourth embodiment
  • FIG. 12B is a conversion lens unit.
  • FIG. 12 is a perspective view showing a state in which 200 is removed from the portable terminal 100 together with the cover 300
  • FIG. 12C is a perspective view showing the cover 300 as a single unit.
  • FIG. 13A is a cross-sectional view of the configuration of FIG. 12A cut along a plane passing through the XIII-XIII line and viewed in the direction of the arrow.
  • FIG.13 (b) is an enlarged view of the site
  • the cover member 300 is made of elastic plastic, and as shown in FIG. 12C, a substantially rectangular thin front plate 301 and side plates that extend short from each side of the front plate 301 in a direction orthogonal to each other. 302 to 305 are integrally formed.
  • the upper side plate 302 is largely cut away from the back side, and the release button 103 and the recess 104 of the body 101 are exposed.
  • the front plate 301 is attached so as to be in close contact with the front surface of the mobile terminal 100.
  • the side plates 302 to 305 hold the portable terminal 100 from the side in the attached state.
  • a circular cover opening 301 a is formed on the front plate of the cover member 300 so as to face the circular opening 101 a of the body 101. Further, the magnets 301c and 301d are arranged opposite to the magnets 101c and 101m of the body 101 with the polarity (N / S) reversed.
  • the portable terminal 100 has the same configuration as that of the embodiment shown in FIG. 10 except that the annular convex portion 101b (see FIG. 1) is not provided. Further, as shown in FIG. 13 (b), the conversion lens unit 200 has an annular convex portion 201f formed around the image-side circular opening 201h on the back side of the back cover 201a. The diameter is equal to the inner diameter of the cover opening 301a, but the other configuration is the same as that of the embodiment shown in FIGS.
  • the cover member 300 When the cover member 300 is attached to the body 101 of the mobile terminal 100, the magnets 301c and 301d are attracted to the magnets 101c and 101m, so that the cover opening 301a is accurately coaxial with the circular opening 101a of the body 101, Accordingly, the cover 300 is fixed to the body 101 such that the coaxiality with the optical axis of the master lens ML is ensured and the back surface of the front plate 301 is in close contact with the front surface of the body 101.
  • the conversion lens unit 200 When the conversion lens unit 200 is attached, the conversion lens unit 200 can be attached to the body 101 via the cover 300 by attracting the magnets 201p and 201q (see FIG. 10) to the magnets 301c and 301d of the cover 300, respectively. it can.
  • the annular convex portion 201 f that rises in an annular shape is fitted into the cover opening 301 a, so that the optical axis can be aligned with the master lens ML of the mobile terminal 100. That is, the magnets 301c and 301d and the cover circular opening 301a constitute main body optical axis alignment means, and the annular convex portion 201f constitutes unit optical axis alignment means.
  • Adjustment of the conversion lens unit 200 can be performed by the same operation using the adjustment mechanism 210 of FIG. 11 as unit adjustment means.
  • Conversion lens unit 200 can be removed by removing magnets 201p and 201q (see FIG. 10) from magnets 301c and 301d of cover 300.
  • FIG. 14A is a perspective view showing a state in which the conversion lens unit 200 is attached to the portable terminal 100 via the cover 300 ′ according to the fifth embodiment, and FIG. FIG.
  • the present embodiment is an example in which unit adjusting means is provided on the cover 300 ′ side with respect to the fourth embodiment.
  • the cover 300 ′ is integrally provided with a box-shaped block 306 at the upper right end of the front plate 301.
  • an adjustment mechanism 210 ' having the same configuration as the unit adjustment unit shown in FIG. 11 is provided (FIG. 14B).
  • the upper end of the round shaft of the adjustment mechanism 210 ′ is exposed on the upper surface of the block portion 306, and becomes a head 211 ′ having an enlarged diameter.
  • the conversion lens unit 200 is provided with a plate portion 201k that faces the front surface of the block portion 306 in the attached state, and the plate portion 201k faces the magnet 201q ′ of the adjustment mechanism 210 ′ and has a polarity (N / N S) has a reverse magnet 201q.
  • Other configurations are the same as those of the above-described embodiment.
  • the magnetic attractive force generated by the magnet 301c closer to the cover circular opening 301a is preferably smaller than the magnetic attractive force generated by the farther magnet 201q '. If the magnetic attraction force of the magnet 301c is weakened, the magnetic attraction force of the magnets 201q ′ and 201q is strongly prioritized when the head 211 ′ is rotated, so the conversion lens unit 200 rotates around the cover circular opening 301a. It becomes easy to do.
  • the magnetic attractive force by the magnet 301c is sufficient to draw the conversion lens unit 200 toward the cover 300 'and the portable terminal 100 in the optical axis direction. Such a difference in magnetic attractive force can be easily changed by adjusting the clearance between the magnets. You may use the magnet from which magnetic force differs. The same applies to other embodiments.
  • a magnet (not shown) on the back surface of the conversion lens unit 200 is attached to the magnet 101c of the body 101 with the cover 300 ′ attached to the mobile terminal 100, as in the fourth embodiment.
  • the conversion lens unit 200 is uniquely attached to the body 101 by attracting and attracting the magnet 201q of the plate portion 201k to the magnet 201q ′ of the block portion 306.
  • the block 306 is similar to the example of FIG.
  • the magnet 201q ′ moves relative to the vertical direction.
  • the plate portion 201k moves up and down with respect to the block portion 306, so that the phase can be adjusted.
  • a marking line can be formed across the head portion 211 ′ and the block portion 306.
  • the conversion lens unit side is relatively displaced with respect to the body 101 of the mobile terminal 100.
  • the imaging element and the master lens are relatively rotated.
  • a master lens (not shown) and an image sensor are housed in a box 110, and the box 110 is rotatable around the optical axis of the master lens by a shaft (not shown). It is supported by.
  • a fan-shaped gear 111 is formed on the outer periphery of the box 110.
  • a motor 112 is attached to the body 101 adjacent to the box 110, and a pinion 112 a provided on the rotating shaft is engaged with the gear 111.
  • a mode switch SW which will be described later, is provided on the side surface of the body 101.
  • a conversion lens unit (not shown) uses the above-described optical axis alignment means and is fixed to the body 101 with screws or the like.
  • FIG. 16 is a block diagram illustrating a part of the control circuit of the mobile terminal 100.
  • the control circuit determines whether or not the memory 113 that is a main body recording unit that stores the rotation driving direction and the rotation amount (adjustment amount) of the motor 112 and whether the conversion lens unit is assembled to the body 101 of the portable terminal 100. It has a sensor 114 that is a discriminating unit for discriminating, and a CPU 115 that functions as an arithmetic unit, a main body adjusting unit, and an imaging control unit as well as managing the original functions of the mobile terminal 100. Examples of the sensor 114 include a contact sensor provided on the annular convex portion 101b.
  • Such a contact sensor is sufficient if it transmits an ON signal to the CPU 115 when the housing of the conversion lens unit 200 is attached, and transmits an OFF signal when it is removed.
  • the motor 112 is of a type that can detect and output the rotational position of the rotating shaft, and serves as a driving means and a displacement amount detecting means. Other configurations are the same as those of the above-described embodiment.
  • a reference subject such as a chart
  • a signal from the image sensor CMOS is processed to monitor the reference image 102.
  • the CPU 115 rotates the motor 112 to determine the rotation direction and the rotation amount with the least vignetting with respect to the reference position.
  • the rotation direction and the rotation amount are stored in the memory 113.
  • the CPU 115 accesses the motor 112 to detect the current rotation axis. , And the memory 113 is accessed to read the rotation direction and the rotation amount at the time of adjustment. Then, the CPU 115 drives and controls the motor 112 to rotate the rotation shaft so as to match the rotation direction and the rotation amount at the time of adjustment. At this time, the CPU 115 can display the rotation direction and the rotation amount at the time of adjustment on the monitor 102 which is a display means.
  • the CPU 115 can selectively set one of the prohibit mode and the permit mode in accordance with the operation of the mode switch SW.
  • the prohibit mode is set, the CPU 115 captures an image with the image sensor CMOS until the position of the rotation axis of the motor 112 substantially matches the rotation direction and the rotation amount at the time of adjustment (for example, within ⁇ 0.5 °). Is prohibited. Thereby, it is possible to prevent imaging in which vignetting occurs.
  • “prohibit imaging” not only prohibits the operation of the image sensor CMOS itself, but also includes a case where image processing is not performed or recording / display is not performed when an image signal is output from the image sensor CMOS. .
  • the CPU 115 permits imaging by the image sensor CMOS regardless of the position of the rotation axis of the motor 112. This avoids the possibility of missing a release chance.
  • the rotation direction and rotation amount with the least amount of vignetting are determined by the adjustment at the time of shipment from the factory, the rotation direction and rotation amount are determined. It can also be stored in an IC chip (unit recording means) provided in the conversion lens unit 200.
  • the CPU 115 accesses the motor 112 in response to detecting that the conversion lens unit has been removed from the portable terminal 100 and attached again by inputting a signal from the sensor 114, The rotation position of the rotation axis is detected, and as indicated by the dotted line in FIG. 16, the IC chip is accessed to read the rotation direction and the rotation amount at the time of adjustment.
  • the CPU 115 drives and controls the motor 112 to rotate the rotation shaft so as to match the rotation direction and the rotation amount at the time of adjustment.
  • the CPU 115 can display the rotation direction and the rotation amount at the time of adjustment on the monitor 102 which is a display means. If the prohibit mode is set in the same manner as described above, the CPU 115 captures the image sensor CMOS until the position of the rotation axis of the motor 112 substantially matches the rotation direction and the rotation amount at the time of adjustment (for example, within ⁇ 0.5 °). The imaging by can be prohibited. Other than that, it is the same as the embodiment described above.
  • the present invention is not limited to the embodiments described in the specification, and it is apparent to those skilled in the art from the embodiments and technical ideas described in the present specification that other modifications are included.
  • the phase adjustment of the optical axis of the variable power lens group around the optical axis of the master lens may be performed not only at the time of factory shipment but also after repair or inspection.
  • the bending optical axis is parallel to the short side of the cross-sectional outline in the direction orthogonal to the optical axis of the light beam emitted from the image-side exit surface of the reflecting optical element.
  • the image pickup surface of the image pickup device is rotated by 90 degrees, and the short side of the image pickup device is parallel to the Y axis.
  • the long side of the outer shape may be bent and parallel to the optical axis.
  • the bent optical axis may be parallel to the Y axis direction, and therefore the optical axis orthogonal to the light beam emitted from the image side emitting surface of the reflective optical element
  • the long side of the directional cross-sectional outline may be bent and parallel to the optical axis. In the latter case, the conversion lens unit extends in the longitudinal direction of the mobile terminal.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lens Barrels (AREA)
  • Studio Devices (AREA)
  • Structure And Mechanism Of Cameras (AREA)

Abstract

La présente invention porte sur une unité de lentille de conversion et un dispositif de capture d'image par lesquels, tout en permettant une capture d'image appropriée, il est possible de garantir une compacité dans une fixation au dispositif de capture d'image. Par capture d'image d'un graphique ou d'un autre sujet photographique de référence par l'intermédiaire d'une unité de lentille de conversion (200) et d'une lentille maître (ML) et traitement d'un signal provenant d'un élément de capture d'image (CMOS), une image de référence est observée avec un dispositif de surveillance (102). Dans cette circonstance, si un vignetage de l'image s'est produit, il est possible de réaliser un réglage de phase d'un axe optique d'un groupe de lentilles de grandissement autour de l'axe optique de la lentille maître par ajustement d'une extrémité avant d'un outil (T) dans une partie de tête (252b) d'une broche de réglage (250) et rotation dudit outil (T).
PCT/JP2013/069264 2012-08-02 2013-07-16 Unité d'élément optique et dispositif de capture d'image WO2014021092A1 (fr)

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WO2023284204A1 (fr) * 2021-07-16 2023-01-19 重庆传音科技有限公司 Ensemble caméra et terminal mobile

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JP2004254139A (ja) * 2003-02-20 2004-09-09 Nec Access Technica Ltd カメラ付き携帯端末
JP2006049936A (ja) * 2004-07-08 2006-02-16 Rarugo:Kk カメラ付き携帯通信端末およびそれに用いる付加レンズ装置
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