WO2011086890A1 - Adaptateur de barillet de l'objectif, barillet de l'objectif et dispositif d'imagerie - Google Patents

Adaptateur de barillet de l'objectif, barillet de l'objectif et dispositif d'imagerie Download PDF

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Publication number
WO2011086890A1
WO2011086890A1 PCT/JP2011/000074 JP2011000074W WO2011086890A1 WO 2011086890 A1 WO2011086890 A1 WO 2011086890A1 JP 2011000074 W JP2011000074 W JP 2011000074W WO 2011086890 A1 WO2011086890 A1 WO 2011086890A1
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WO
WIPO (PCT)
Prior art keywords
lens system
lens
lens barrel
angle
adapter
Prior art date
Application number
PCT/JP2011/000074
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English (en)
Japanese (ja)
Inventor
俊郎 向井
Original Assignee
パナソニック株式会社
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Filing date
Publication date
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Publication of WO2011086890A1 publication Critical patent/WO2011086890A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/16—Housings; Caps; Mountings; Supports, e.g. with counterweight
    • G02B23/18—Housings; Caps; Mountings; Supports, e.g. with counterweight for binocular arrangements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
    • G02B15/144—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only
    • 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
    • G03B17/14—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets interchangeably
    • 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
    • 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
    • G03B35/00—Stereoscopic photography
    • G03B35/08—Stereoscopic photography by simultaneous recording
    • G03B35/10—Stereoscopic photography by simultaneous recording having single camera with stereoscopic-base-defining system

Definitions

  • the present invention relates to a lens barrel adapter, a lens barrel, and an imaging device that are used when shooting a video for viewing as a stereoscopic video.
  • an imaging apparatus such as digital still cameras and video cameras having an imaging element such as a charge coupled device (CCD) and a complementary metal-oxide semiconductor (CMOS) sensor have been widely used.
  • an imaging apparatus is provided with a lens barrel for causing a light beam emitted from a subject to form an image on an image sensor and causing the image sensor to capture an optical image of the subject.
  • CMOS complementary metal-oxide semiconductor
  • an optical image is captured using such a lens barrel, it is desired to capture not only a two-dimensional image but also an image for viewing as a stereoscopic image.
  • a stereoscopic video imaging apparatus is disclosed in Patent Document 1, for example. As shown in FIG.
  • the imaging apparatus includes two left and right shutters 11R and 11L and two left and right mirrors 12R and 12L arranged on the first optical axis and the second optical axis.
  • the luminous flux of the subject on the first optical axis and the luminous flux of the subject on the second optical axis are reflected by the two left and right mirrors 12R and 12L, respectively, and taken into the lens 14 via the prism 13.
  • the light flux of the subject captured by the lens 14 is imaged by the CCD 15.
  • each light flux is imaged by the CCD 15, and the optical image on the first optical axis and the second An optical image on the optical axis is formed.
  • the optical image on the first optical axis and the optical image on the second optical axis formed by the CCD 15 correspond to a right-eye image and a left-eye image for stereoscopic video, respectively. Since the right-eye video and the left-eye video have different optical axes, they have binocular parallax.
  • imaging devices that capture a right-eye video and a left-eye video having binocular parallax are disclosed in Patent Literature 2 and Patent Literature 3.
  • the right-eye video and the left-eye video captured by these imaging devices can be viewed as a stereoscopic video by using, for example, the stereoscopic video display device disclosed in Patent Document 4.
  • the stereoscopic video display device alternately displays a right-eye video and a left-eye video having parallax on the screen of the display panel. When the right-eye video is projected, the viewer can view this video with the right eye, and when the left-eye video is projected, the viewer can view this video with the left eye.
  • shutter-type glasses In order to view the right eye image with the right eye and the left eye image with the left eye, for example, shutter-type glasses are used.
  • a liquid crystal filter that switches between passage and blocking of light is arranged in the right-eye lens and the left-eye lens.
  • the right eye image By switching between the passage and blocking of light by opening and closing the shutter of the liquid crystal filter, the right eye image can be viewed with the right eye, and the left eye image can be viewed with the left eye.
  • the viewer By continuing to open and close the shutter, the viewer can view a stereoscopic image from the right-eye video and the left-eye video having parallax.
  • this 3D image has a different sense of depth and pop-out depending on the amount of parallax between the right-eye image and the left-eye image. If the amount of parallax is large, the depth and pop-out will be large, and if the amount of parallax is small, the depth and pop-out will be small.
  • the right-eye video and the left-eye video for stereoscopic video have parallax.
  • the sense of popping out and the sense of depth of a stereoscopic image also increase. If the feeling of popping out or feeling of depth becomes too large, viewers may feel tired.
  • the convergence angle is not too large.
  • the convergence angle is an angle formed by the right eye and the left eye when viewed from the subject.
  • the convergence angle in the imaging apparatus disclosed in Patent Document 1 corresponds to the angle formed by the left and right mirrors 12R and 12L when viewed from the subject.
  • the convergence angle decreases as the distance between the subject and the imaging apparatus increases, and increases as the distance decreases. Further, the convergence angle is affected by the distance between the left and right mirrors 12R and 12L. The convergence angle decreases as the distance between the optical axis corresponding to the right-eye image and the optical axis corresponding to the left-eye image decreases, and the convergence angle increases as the distance increases.
  • the conventional imaging apparatus cannot sufficiently reduce the convergence angle when shooting a subject at a short distance. If it does so, a viewer may receive a feeling of fatigue from an excessive pop-out feeling and a feeling of depth, and had the problem that he cannot fully enjoy a three-dimensional image.
  • the present invention captures a stereoscopic image that reduces the viewer's fatigue by reducing the angle of convergence when shooting a subject at a short distance, and allows the viewer to enjoy a sense of popping out and depth. It is an object of the present invention to provide a lens barrel adapter, a lens barrel, and an imaging device that enable the above.
  • a lens barrel adapter is a lens barrel adapter that can be attached to and detached from a lens barrel body or an imaging device, and includes a first lens system and a second lens system.
  • the imaging device has a lens barrel body.
  • the first lens system is disposed on the first optical axis.
  • the second lens system is disposed on the second optical axis.
  • the first lens system and the second lens system are three-dimensional from an optical image formed through the first lens system and the barrel main body and an optical image formed through the second lens system and the barrel main body. An image can be formed.
  • the first lens system is configured such that the field angle determined by the lens barrel body and the first lens system is wider than the field angle determined only by the lens barrel body.
  • the second lens system is configured such that the field angle determined by the lens barrel body and the second lens system is wider than the field angle determined only by the lens barrel body.
  • the lens barrel according to the present invention includes a first lens system, a second lens system, and an optical system.
  • the first lens system is disposed on the first optical axis.
  • the second lens system is disposed on the second optical axis.
  • the optical system has a zoom lens system.
  • the zoom lens system performs zoom adjustment between the wide-angle end and the telephoto end.
  • the first lens system, the second lens system, and the optical system include an optical image formed through the first lens system and the optical system, and an optical image formed through the second lens system and the optical system. It is configured to be able to form a stereoscopic image.
  • the first lens system is configured such that the field angle determined by the optical system and the first lens system is wider than the field angle determined only by the optical system.
  • the second lens system is configured such that the field angle determined by the optical system and the second lens system is wider than the field angle determined only by the optical system.
  • the present invention it is possible to reduce a viewer's feeling of fatigue and to capture a stereoscopic image in which the viewer can enjoy a feeling of popping out and a feeling of depth.
  • Sectional drawing of the lens-barrel main body of the video camera which concerns on one embodiment
  • Schematic diagram of the lens system on the first optical axis Schematic diagram of the lens system on the second optical axis Diagram showing the relationship between the effective image circle formed on the image sensor and the size of the image area
  • Diagram showing the relationship between the stereo base and focal length when no lens system is placed on the lens barrel adapter
  • Diagram showing the relationship between the stereo base and the convergence angle by shooting distance Diagram showing the relationship between the shooting distance and the stereo base for each convergence angle
  • the video camera 200 includes a lens barrel 500 (an example of a lens barrel).
  • the lens barrel 500 includes a barrel main body 100 and a barrel adapter 400 (an example of a barrel adapter).
  • a barrel adapter 400 an example of a barrel adapter.
  • FIGS. 1 and 2 The overall configuration of the video camera 200 with the lens barrel adapter 400 removed from the lens barrel body 100 will be described.
  • the lens barrel body 100 includes a lens barrel casing 105, a lens controller 240 b (an example of a control unit), an optical system O, and a diaphragm 150.
  • the optical system O includes a first lens system 110, a second lens system 120 (an example of a zoom lens system), a third lens system 130, and a fourth lens system 140.
  • the lens controller 240b, the optical system O, and the diaphragm 150 are held inside the lens barrel casing 105.
  • the lens controller 240b controls the operation of each unit included in the barrel main body 100.
  • the video camera 200 includes a lens barrel body 100 and a camera body 210.
  • the lens barrel body 100 is attached to the camera body 210.
  • the camera body 210 includes a prism 220, an image sensor 230, a camera controller 240a, and an operation unit 250.
  • the image sensor 230 captures an optical image of the subject via the prism 220.
  • the camera controller 240a controls the entire operation of the video camera 200 while communicating with the lens controller 240b.
  • the operation unit 250 is an operation interface that receives various operations from the user.
  • the operation unit 250 can take the form of a button, a switch, a lever, a touch panel, or the like.
  • the operation unit 250 When the operation unit 250 receives an operation from the user, the operation unit 250 transmits a signal indicating the content of the operation to the camera controller 240a.
  • the first lens system 110 arranged in the barrel main body 100 is fixedly arranged at the subject-side tip of the barrel casing 105 so as not to move in the optical axis direction. ing.
  • the first lens system 110 first captures the light beam 300 emitted from the subject and received by the lens barrel body 100.
  • the second lens system 120 is arranged in the lens barrel casing 105 so as to be movable in the optical axis direction behind the first lens system 110.
  • the second lens system 120 takes in the luminous flux 300 of the subject via the first lens system 110.
  • the third lens system 130 is fixed to the lens barrel casing 105 so as not to move in the optical axis direction behind the second lens system 120.
  • the third lens system 130 takes in the luminous flux 300 of the subject via the second lens system 120.
  • the fourth lens system 140 is disposed behind the third lens system 130 in the lens barrel casing 105 so as to be movable in the optical axis direction.
  • the fourth lens system 140 takes in the light flux 300 of the subject via the third lens system 130.
  • the diaphragm 150 is disposed in front of the third lens system 130.
  • the second lens system 120 is a zoom lens system that adjusts the zoom between the wide-angle end and the telephoto end.
  • the second lens system 120 has a zoom function that changes the angle of view on the wide-angle side by becoming closer to the first lens system and on the telephoto side by becoming closer to the third lens system.
  • the second lens system 120 has a negative focal length.
  • the combined focal length of the first lens system 110 and the second lens system 120 is a small (strong) negative focal length.
  • the focal length of the third lens system 130 is combined with the combined focal length of the first lens system 110 and the second lens system 120, so that a positive or large (weak) negative combined focal length is obtained. That is, the third lens system 130 is a correction lens system for converting into a real image in order to form an image on the image sensor 230.
  • the third lens system 130 has a positive focal length.
  • the fourth lens system 140 is a focusing lens system for adjusting the focus.
  • the fourth lens system 140 has a positive focal length.
  • zoom adjustment is performed mainly by moving the second lens system 120 in the optical axis direction.
  • the focus adjustment is performed mainly by moving the fourth lens system 140 in the optical axis direction.
  • the video camera 200 includes a lens barrel adapter 400.
  • the lens barrel adapter 400 is detachably attached to the lens barrel body 100.
  • the lens barrel adapter 400 includes an adapter first lens system 410 (an example of a first lens system), a first lens system first mirror 412, a first lens system second mirror 414, and an adapter second lens system 420. (An example of a second lens system), a second lens system first mirror 422, and a second lens system second mirror 424.
  • the adapter first lens system 410, the first lens system first mirror 412, and the first lens system second mirror 414 are sequentially arranged on the first optical axis from the subject side to the image sensor 230 side.
  • the first lens system first mirror 412 is disposed behind the adapter first lens system 410.
  • the first lens system second mirror 414 is disposed in a direction substantially perpendicular to the first optical axis.
  • the adapter second lens system 420, the second lens system first mirror 422, and the second lens system second mirror 424 are sequentially arranged on the second optical axis from the subject side to the image sensor 230 side.
  • the second lens system first mirror 422 is disposed behind the adapter second lens system 420.
  • the second lens system second mirror 424 is arranged in a direction substantially perpendicular to the second optical axis.
  • the adapter first lens system 410 has a fixed structure that does not move in the optical axis direction.
  • the adapter first lens system 410 has a negative focal length.
  • the first lens system first mirror 412 reflects the light beam 300 transmitted through the adapter first lens system 410 at a reflection angle of about 45 degrees.
  • the first lens system second mirror 414 further reflects the light beam 300 from the first lens system first mirror 412 at a reflection angle of about 45 degrees to guide the optical image to the lens barrel body 100 of the video camera 200.
  • the adapter second lens system 420 has a fixed structure that does not move in the optical axis direction.
  • the adapter second lens system 420 has a negative focal length. As shown in FIG.
  • the second lens system first mirror 422 reflects the light beam 300 transmitted through the adapter second lens system 420 at a reflection angle of about 45 degrees.
  • the second lens system second mirror 424 further reflects the light beam 300 from the second lens system first mirror 422 with a reflection angle of about 45 degrees to guide the optical image to the lens barrel body 100 of the video camera 200.
  • the lens barrel adapter 400 has a target configuration with respect to the optical axis of the lens barrel main body 100.
  • a two-dimensional image having parallax on the first optical axis and the second optical axis is generated in the image sensor 230, and a stereoscopic image can be generated using both video signals.
  • the optical image formed through the adapter first lens system 410 and the lens barrel body 100 and the optical image formed through the adapter second lens system 420 and the lens barrel body 100 are three-dimensional. An image can be formed.
  • the lens barrel main body 100 includes a first lens system 110 for fixing, a second lens system 120 that is a zoom lens system, a third lens system 130 that is a correction lens system, A fourth lens system 140 that is a lens system for focus adjustment is disposed.
  • the lens barrel adapter 400 is provided with an adapter first lens system 410 disposed on the first optical axis and an adapter second lens system 420 disposed on the second optical axis.
  • These lens systems are determined by the lens barrel main body 100 and the lens barrel adapter 400 rather than the angle of view determined only by the lens barrel main body 100 in a state where the lens barrel adapter 400 is attached to the lens barrel main body 100.
  • An angle of view corresponding to one optical axis and an angle of view corresponding to the second optical axis are each increased.
  • the first optical axis determined by the lens barrel adapter 400 via the adapter first lens system 410 is larger than the angle of view determined by the lens barrel body 100 without passing through the adapter first lens system 410.
  • the angle of view corresponding to is wide.
  • the angle of view determined by the lens barrel main body 100 without the adapter second lens system 420 is set to the second optical axis determined by the lens barrel adapter 400 via the adapter second lens system 420.
  • the corresponding angle of view is wide.
  • the angle of view of the entire video camera 200 is widened before the lens barrel adapter 400 is attached to the lens barrel body 100. Therefore, the combined focal length of the entire video camera 200 is smaller after the lens barrel adapter 400 is attached to the lens barrel body 100 than before the lens barrel adapter 400 is attached.
  • the angle of view corresponding to the first optical axis and the angle of view corresponding to the second optical axis determined by the lens barrel body 100 and the lens barrel adapter 400 after the lens barrel adapter 400 is attached. are equal to each other.
  • the optical image formed by the light beam 300 having the first optical axis and the optical image formed by the light beam 300 having the second optical axis become symmetrical, and a stereoscopic image formed from both optical images is more It is appropriate.
  • the angle of view may be different from each other within a range where a stereoscopic image can be formed.
  • the video camera 200 has a stereoscopic shooting mode for shooting stereoscopic images.
  • the lens controller 240 b can detect whether the lens barrel adapter 400 is attached to or detached from the lens barrel body 100. When the lens controller 240b detects attachment / detachment of the lens barrel adapter 400 to / from the lens barrel body 100, the lens controller 240b notifies the camera controller 240a accordingly. Upon receiving notification from the lens controller 240b that the lens barrel adapter 400 is attached to the lens barrel body 100, the camera controller 240a switches the video camera 200 to the stereoscopic shooting mode. When switched to the stereoscopic shooting mode, the camera controller 240a notifies the lens controller 240b that the switching to the stereoscopic shooting mode has been performed. The lens controller 240b moves the second lens system 120 to the maximum telephoto position on the optical axis when receiving a notification from the camera controller 240a that the stereoscopic shooting mode has been switched.
  • the second lens system 120 which is a zoom lens system, moves on the optical axis so that the telephoto is maximized, and is set to the state after the movement. At this time, the second lens system 120 moves on the optical axis so as to be closest to the third lens system 130, and is set in a state after the movement.
  • the angle of view determined only by the lens barrel main body 100 is in the range of 0.7 degrees to 24.4 degrees.
  • the angle of view corresponding to the first optical axis and the second optical axis determined by the lens barrel main body 100 and the lens barrel adapter 400 after the lens barrel adapter 400 is attached is in the range of 27 to 84 degrees.
  • the specifications of the lens barrel body 100 are as follows.
  • the focal length is 3.06 mm (43.8 mm in terms of 35 mm film) at the wide-angle end, and 35.97 mm (514.7 mm in terms of 35 mm film) at the telephoto end.
  • the zoom ratio is 11.76 times.
  • the size of the image sensor 230 is 1/6 inch, and the effective image circle is ⁇ 3 mm.
  • the first lens system 110 the second lens system 120, and the aperture arranged in the lens barrel main body 100 are used.
  • the luminous flux 300 of the subject forms an image within the effective image circle of ⁇ 3 mm on the element surface of the image sensor 230 to form an optical image.
  • the signal held by the element surface of the image sensor 230 is cut out as a video signal according to the aspect ratio of the television. As shown in FIG.
  • the image is taken in a photographing area having a length of 1.47 mm and a width of 2.61 mm. .
  • the light flux 300 is guided from the first optical axis and the second optical axis.
  • the light beam 300 from the first optical axis passes through the adapter first lens system 410, the first lens system first mirror 412, and the first lens system second mirror 414 to the lens system disposed in the lens barrel body 100. It is captured.
  • the light beam 300 from the second optical axis passes through the adapter second lens system 420, the second lens system first mirror 422, and the second lens system second mirror 424 to the lens system disposed in the lens barrel body 100. It is captured. Either one of the light flux 300 from the first optical axis or the light flux 300 from the second optical axis is formed as an optical image of the right-eye image, and the other is formed as an optical image of the left-eye image.
  • an optical image in which the light beam 300 from the first optical axis is imaged and an optical image in which the light beam 300 from the second optical axis is imaged are the image sensor 230.
  • the exposure is divided into left and right.
  • an image is captured on an element surface of the image sensor 230 using a similar imaging area having the same aspect ratio as that during normal shooting.
  • the angle of view becomes narrower as the effective image circle becomes smaller from ⁇ 3 mm to ⁇ 1.62 mm as compared with the normal shooting.
  • the focal length in terms of 35 mm film is 43.8 mm to 514.7 mm.
  • the lens barrel adapter having only a mechanism for obtaining the left and right images (only the mirrors 412, 414, 422, 424 in the lens barrel adapter 400) is attached to the lens barrel body 100, the effective image circle becomes small. Therefore, the focal length in terms of 35 mm film of the video camera 200 is 81 mm to 953 mm.
  • the focal length in terms of 35 mm film is preferably 24 mm to 90 mm.
  • the lens barrel main body 100 when a lens barrel adapter having only a mechanism for obtaining left and right images (only the mirrors 412, 414, 422, and 424 in the lens barrel adapter 400) is attached, appropriate 3D It can be seen that the focal length outside the shooting range is taken. However, in the present embodiment, due to the presence of the adapter first lens system 410 and the adapter second lens system 420, the angle of view of the entire video camera 200 is more than that before the lens barrel adapter 400 is attached to the lens barrel body 100. Can be wide.
  • the second lens system 12 that is a zoom lens system is set at the maximum telephoto position.
  • the focal length of the barrel main body 100 when set to the maximum telephoto position is 35.97 mm.
  • the lens barrel adapter 400 when the lens barrel adapter 400 is attached, the combined focal length from the adapter first lens system 410 to the fourth lens system 140 and the combined focal length from the adapter second lens system 420 to the fourth lens system 140 are both. , Respectively, becomes 2.07 mm. Therefore, by attaching the lens barrel adapter 400 to the camera body 210, the focal length is shortened from 35.97 mm to 2.07 mm. Therefore, the focal length in terms of 35 mm film is reduced from 953 mm to 55.4 mm.
  • the video when shooting a stereoscopic video, as shown in FIG. 8, the video may be shot using an imaging area on the element surface of the imaging device 230 with an aspect ratio that is not the same as that during normal shooting.
  • imaging areas are formed on the left and right of the effective image circle ⁇ 1.97 mm, respectively.
  • the focal length in terms of 35 mm film is preferably 24 mm to 90 mm. Therefore, the zoom level of the video camera 200 is adjusted so that the focal length in terms of 35 mm film is 87.5 mm between 24 mm and 90 mm, and the lens barrel adapter 400 is temporarily connected to the first lens system first mirror 412.
  • the second lens system first mirror 422, the first lens system second mirror 414, and the second lens system second mirror 424 (in other words, from the lens barrel adapter 400 to the adapter first lens system 410)
  • the stereo base is 86.4 mm as shown in FIG. That is, as shown in FIGS. 10 and 11, when the shooting distance is 5 m, the convergence angle is around 2 degrees, and when the shooting distance is 1 m, the convergence angle is 10.3 degrees (not shown). . In other words, the parallax becomes too large at a shooting distance closer than 5 m, and is not suitable for 3D shooting.
  • the stereo base exceeds 100 mm as shown in FIG. Becomes extremely large. Therefore, in order to realize comfortable 3D shooting, the stereo base is preferably narrower than 86.4 mm. Therefore, in this embodiment, comfortable 3D shooting is realized by attaching the lens barrel adapter 400 to the video camera 200.
  • the second lens system 120 when switched to the stereoscopic shooting mode, the second lens system 120, which is a zoom lens system, is set to the maximum telephoto position so that the stereo base becomes as small as possible. Further, the focal lengths of the first lens system 410 for the adapter and the second lens system 420 for the adapter of the barrel adapter 400 through the first lens system first mirror 412 and the first lens system second mirror 414, respectively. -12.2mm.
  • the stereo base is 38.6 mm
  • the focal length of the optical system of the video camera 200 is equivalent to 50 mm to 60 mm in terms of 35 mm film (more specifically, in this embodiment, 55 mm .4 mm).
  • the stereo base can be 38.6 mm when the focal length is 55.4 mm.
  • the convergence angle in the range of the shooting distance of 1 m to 10 m is 3 degrees or less, and comfortable 3D shooting can be performed.
  • the luminous flux 300 of the subject passes through the adapter first lens system 410 disposed on the first optical axis and the adapter second lens system 420 disposed on the second optical axis.
  • the second lens system 120 is a zoom lens system.
  • the first optical axis determined by the lens barrel main body 100 and the lens barrel adapter 400 is larger than the angle of view determined only by the lens barrel main body 100.
  • the corresponding field angle and the field angle corresponding to the second optical axis are increased. Accordingly, the convergence angle can be reduced even when shooting a subject at a short distance.
  • the convergence angle is 3 degrees or less even in the imaging range of 1 to 10 mm. Therefore, the video camera 200 can reduce a viewer's feeling of fatigue and can capture a stereoscopic image in which the viewer can enjoy a feeling of popping out and a feeling of depth.
  • the distance (stereo base) between the first optical axis and the second optical axis of the imaging device is 70 mm to 90 mm. Often set. However, when the stereo base is set to 70 mm to 90 mm, the convergence angle becomes 3 degrees or more, and it is difficult to appropriately capture a stereoscopic image of a subject at a short distance (about 1 m to 10 m). However, the shooting distance at which the viewer can enjoy the sense of popping out and the depth of a stereoscopic image is limited to a short distance (about 1 m to 10 m).
  • the stereo base is reduced to 38.4 mm and the convergence angle is set to 3 degrees or less.
  • the angle of view determined only by the lens barrel main body 100 is in the range of 0.7 degrees to 24.4 degrees.
  • the angle of view corresponding to the first optical axis and the angle of view corresponding to the second optical axis determined by the lens barrel main body 100 and the lens barrel adapter 400. Is in the range of 27 to 84 degrees. This makes it possible to accurately set the convergence angle to 3 degrees or less even when shooting a subject at a short distance of about 1 m to 10 m.
  • the second lens system that is a zoom lens system is set in a state of being moved in the optical axis direction so that the telephoto is maximized.
  • the lens barrel adapter 400 and the lens barrel main body 100 are separate components and are detachable.
  • the lens barrel adapter 400 and the lens barrel body 100 are integrally formed.
  • the lens barrel 500 may include the lens system of the lens barrel adapter 400 in advance.
  • the lens controller 240b when the lens barrel adapter 400 is attached to the lens barrel body 100, the lens controller 240b causes the second lens system 120 to be moved when the second lens system 120 is on the wide-angle side with respect to the maximum telephoto position. It was supposed to move to the maximum telephoto position. However, you may change as follows. That is, when the lens barrel adapter 400 is attached to the lens barrel main body 100, the lens controller 240b or the camera controller 240a determines whether or not the second lens system 120 is on the wide angle side with respect to a predetermined position. Then, when it is determined that the second lens system 120 is on the wide-angle side with respect to the predetermined position, the lens controller 240b moves the second lens system 120 to a predetermined position on the telephoto side. Note that the predetermined position according to this modification is a position on the wide angle side from the maximum telephoto position.
  • the operation unit 150 may receive an operation for switching the digital camera 200 to the stereoscopic shooting mode.
  • the camera controller 240a determines that the second lens system 120 is in the wide-angle side with respect to the maximum telephoto position. 120 may be moved to the maximum telephoto position.
  • the lens controller 240b or the camera controller 240a determines whether or not the second lens system 120 is on the wide angle side with respect to a predetermined position. .
  • the lens controller 240b moves the second lens system 120 to a predetermined position on the telephoto side.
  • the predetermined position according to this modification is a position on the wide angle side from the maximum telephoto position.
  • the configuration of the reflecting mirror of the lens barrel adapter 400 may be configured as shown in FIG. 12 which is different from the above embodiment.
  • the light beam 300 from the first optical axis is reflected by the first lens system first mirror 412 and then reflected by the first lens system second mirror 414, which is the same as the above embodiment. It is.
  • the lens barrel adapter 400 shown in FIG. 12 the light beam 300 from the second optical axis is reflected by the second lens system first mirror 422, then reflected by the second lens system second mirror 424, and then the first lens system 400. It is taken into the lens barrel body 100 via the lens system second mirror 414.
  • the first lens system second mirror 414 is a half mirror.
  • the light flux 300 from the first optical axis reflected by the first lens system second mirror 414 and the light flux 300 from the second optical axis taken into the barrel main body 100 via the first lens system second mirror 414 are: , Located on the same optical axis.
  • the optical image formed by the light beam 300 having the first optical axis and the optical image formed by the light beam 300 having the second optical axis are not divided into left and right on the element surface of the image sensor 230. To be exposed.
  • an optical image formed by forming the light beam 300 having the first optical axis and an optical image 300 formed by forming the light beam having the second optical axis are each effective image circles of ⁇ 3.0 mm as shown in FIG.
  • the image is formed in an imaging area (a dotted line range) having a diagonal line of 3.0 mm. That is, the maximum imaging area that realizes an aspect ratio of 16: 9 can be achieved, and thus the resolution can be improved.
  • the optical image formed by the light beam 300 having the first optical axis and the optical image formed by the light beam 300 having the second optical axis are exposed on the surface of the image sensor 230 without being divided into left and right. . Therefore, it is necessary to perform exposure while switching each optical image.
  • a shutter may be disposed on each of the first optical axis and the second optical axis, and the shutters may be alternately opened and closed.
  • the present invention is applicable to a digital still camera and a digital video camera.
  • DESCRIPTION OF SYMBOLS 100 Lens barrel body 105 Lens barrel casing 110 First lens system 120 Second lens system 130 Third lens system 140 Fourth lens system 150 Aperture 200 Video camera 210 Camera body 220 Prism 230 Imaging element 240a Camera controller 240b Lens controller 250 Operation unit 300 luminous flux 400 barrel adapter 410 first lens system for adapter 412 first lens system first mirror 414 first lens system second mirror 420 second lens system for adapter 422 second lens system first mirror 424 second lens system second 2 mirrors 500 lens barrel

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Structure And Mechanism Of Cameras (AREA)
  • Accessories Of Cameras (AREA)
  • Stereoscopic And Panoramic Photography (AREA)
  • Lenses (AREA)
  • Studio Devices (AREA)

Abstract

L'invention porte sur un adaptateur de barillet de l'objectif qui peut être fixé de manière détachable à un corps principal de barillet de l'objectif ou à un dispositif d'imagerie, et qui est pourvu d'un premier système d'objectif et d'un second système d'objectif. Le dispositif d'imagerie a un corps principal de barillet de l'objectif. Le premier système d'objectif est disposé le long d'un premier axe optique. Le second système d'objectif est disposé le long d'un second axe optique. Le premier système d'objectif et le second système d'objectif sont configurés de telle sorte qu'une image stéréoscopique peut être formée à partir d'une image optique fournie par l'intermédiaire du premier système d'objectif et du corps principal de barillet de l'objectif et à partir d'une image optique fournie par l'intermédiaire du second système d'objectif et du corps principal de barillet de l'objectif. Le premier système d'objectif est configuré de telle sorte que l'angle de vision déterminé par le corps principal de barillet de l'objectif et le premier système d'objectif est supérieur à l'angle de vision déterminé par le corps principal de barillet de l'objectif seul. Le second système d'objectif est configuré de telle sorte que l'angle de vision déterminé par le corps principal de barillet de l'objectif et le second système d'objectif est supérieur à l'angle de vision déterminé par le corps principal de barillet de l'objectif seul.
PCT/JP2011/000074 2010-01-14 2011-01-11 Adaptateur de barillet de l'objectif, barillet de l'objectif et dispositif d'imagerie WO2011086890A1 (fr)

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JP2010-005471 2010-01-14
JP2010005471A JP2013057698A (ja) 2010-01-14 2010-01-14 鏡筒アダプタ、レンズ鏡筒およびそれを用いた撮像装置

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US11796906B2 (en) 2019-09-19 2023-10-24 Canon Kabushiki Kaisha Lens apparatus and image pickup apparatus

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CN107065402A (zh) * 2017-03-09 2017-08-18 北京清影机器视觉技术有限公司 用于三维成像的多镜头合成转接件组件及相机
US11280985B2 (en) * 2018-09-17 2022-03-22 Google Llc Optical arrangement for producing virtual reality stereoscopic images
JP2020154008A (ja) * 2019-03-18 2020-09-24 キヤノン株式会社 レンズ装置および撮像装置

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