JP2015025828A - Imaging apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an imaging apparatus capable of appropriately holding the position of a twin optical system.SOLUTION: The imaging apparatus includes: a first lens unit which has a lens for forming an image of a subject from of a first view point and which has a first bridged part: a second lens unit which has a lens for forming an image of the subject from a second view point different from the first view point and which has a second bridged part; a lens base for fixing the side of the first lens unit and the second lens unit opposite to the side where the first bridged part and the second bridged part are provided; and a bridge part that bridges the first bridge part and the second bridge part. One end of the bridge part is disposed being interposed by a predetermined extra width from the first bridged part, and the other end of the bridge part is disposed being interposed by a predetermined extra width from the second bridged part.

Description

  The present invention relates to an imaging apparatus, and relates to an imaging apparatus having a two-lens optical system.

  There are known digital still cameras and digital video cameras that have a two-lens optical system and can capture 3D images. For example, Patent Document 1 discloses a twin-lens digital camera.

JP 2004-120527 A

  In order to obtain a 3D image that can be viewed satisfactorily, a highly accurate adjustment is required. For example, the vertical displacement of the binocular optical system and the adjustment of the convergence angle are required. On the other hand, when using a twin-lens imaging device, the user may be dropped due to carelessness or an unexpected impact may be applied. Even in such a case, it is desirable to be able to avoid the occurrence of deviation with respect to the binocular optical system adjusted with high accuracy.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an imaging apparatus that can hold the position of the binocular optical system more appropriately.

  In order to solve the above-described problems, an imaging apparatus according to the present invention includes a lens for forming a subject image at a first viewpoint, a first lens unit having a first bridged portion, and a first lens unit. Comprising a lens for forming a subject image of a second viewpoint different from the viewpoint of the second lens unit having a second bridged portion, the first lens unit and the second lens unit, The surface having the first cross-linked portion and the second cross-linked portion is a lens base that fixes the other surface side, and the cross-linked portion that cross-links the first cross-linked portion and the second cross-linked portion. And one end of the bridging portion is arranged with a predetermined margin width with the first bridging portion, and the other end of the bridging portion is arranged with a predetermined margin width with the second bridging portion. Is done.

  Preferably, one end of the bridging portion is arranged with a first buffer member attached to the first bridging portion and a predetermined margin, and the other end of the bridging portion is the second bridging portion. And a second buffer member attached to the base plate and a predetermined extra width.

  ADVANTAGE OF THE INVENTION According to this invention, the imaging device which can hold | maintain the position of a binocular optical system more appropriately can be provided.

Overall perspective view of movie camera 100 Whole perspective view with lens unit of movie camera 100 exposed Overall perspective view of a lens unit 190 incorporated in the lens frame 200 The whole perspective view seen from the back side of lens unit 190 built in lens frame 200 The exploded perspective view which looked at the lens frame 200, the lens unit 190, and the lens stabilizer 210 from the back side. The perspective view which decomposed | disassembled the lens frame 200, the lens unit 190, and the lens stabilizer 210. The figure for demonstrating the bridge | crosslinking part of the lens unit 190

[Embodiment 1]
[1. Overall configuration of movie camera)
An outline of the overall configuration of the movie camera 100 according to the first embodiment will be described with reference to FIG. FIG. 1 is an overall view of the movie camera 100.

  The movie camera 100 according to Embodiment 1 includes a lens unit 110, a camera body unit 120, a handle unit 130, and a manual ring unit 140. The lens unit 110 includes a lens unit 190 including a plurality of lenses. The manual ring unit 140 includes a manual zoom ring, a manual focus ring, and a manual iris ring. The camera body unit 120 includes an image sensor that captures a subject image obtained through the optical system of the lens unit 110, an image processing engine that performs image processing on the output of the imaging sensor, a controller that controls each unit of the camera body, and an image A card slot into which a memory card capable of recording an image file output from the processing engine is mounted, an operation unit that operates various functions of the movie camera 100, a battery that supplies power to each unit of the movie camera 100, and the like. The handle portion 130 is a portion that is provided on the upper portion of the camera body portion 120 and is gripped by the user when photographing.

[2.2 Configuration of the eye lens unit 190]
Next, the configuration of the binocular lens unit 190 will be described.

  FIG. 2 is an overall perspective view in which the lens unit of the movie camera 100 is exposed. As shown in FIG. 2, the lens unit 110 includes a lens unit 190, a lens hood 150 that covers the lens unit 190, a lens mask 160, a lens cover R170, and a lens cover L180. The lens mask 160, the lens cover R170, and the lens cover L180 cover the lens unit 190 in a state where a certain amount of space is provided, not in a state of being in close contact with the lens unit 190. Thereby, even if an external force is applied to the lens unit 110, the impact can be absorbed by the lens mask 160, the lens cover R170, and the lens cover L180, and the lens unit 190 can be protected. The lens hood 150 is made of a material that is more elastic than a normal exterior material made of plastic, such as an elastomer. Thereby, even if an external force is applied from the front of the lens unit 110, the impact is absorbed by the lens hood 150, and the lens unit 190 can be protected.

  FIG. 3 is an overall perspective view of the lens unit 190 incorporated in the lens frame 200. When the exterior member of the movie camera 100 is removed, as shown in FIG. 3, a unit in which the lens unit 190, the lens frame 200, and the lens stabilizer 210 are combined together is exposed.

  As shown in FIG. 3, the lens unit 190 includes a lens R220 and a lens L230. The lens R220 includes an optical system for forming a subject image for the right eye, and includes a focus lens, a zoom lens, and the like. Similarly, the lens L230 includes an optical system for forming a subject image for the left eye, and includes a focus lens, a zoom lens, and the like.

  When the lens unit 190 is combined with the lens frame 200, the lens R220 and the lens L230 are fixed by the lens stabilizer 210. The lens stabilizer 210 fixes the lens 220 and the lens L230 via a damper rubber R280 and a damper rubber L290.

  The lens stabilizer 210 includes an arm 211, an arm 212, and an arm 213. The arm 211 is an arm that bridges the lens R220 and the lens L230. The arm 212 and the arm 213 extend in a direction perpendicular to each other and extend in a direction perpendicular to the direction in which the arm 211 extends. The lens stabilizer 210 is fixed to the lens frame 200 with the arm 212 engaged with the engaging portion R240 and the arm 213 engaged with the engaging portion F250.

  The stabilizer 210 is made of a material having a certain degree of rigidity and elasticity, such as stainless steel. Thereby, even if the stabilizer 210 is bent due to the fall of the movie camera 100 or the like, it is possible to ensure the strength to return to the original position.

  In the binocular 3D shooting, in order to perform macro shooting, it is desirable that the distance between the lens R220 and the lens L230 is short. The arm 213 of the lens stabilizer 210 is located between the lens R220 and the lens L230. Therefore, in order to make the distance between the lens R220 and the lens L230 as close as possible, the arm 213 has a notched inner side on both sides facing the lens R220 and the lens L230. When a notched neck is formed, the central portion of the arm 213 is thinned and the strength is lowered. Therefore, the arm 213 forms a beading F270 having a thickness larger than that of the peripheral portion, and this strength reduction is reinforced. Similarly, in the arm 211 and the arm 212, a beading T260 is formed so as to be T-shaped at the intersection between them. Thereby, the intensity | strength with respect to elastic deformation when external force is added to the lens stabilizer 210 is ensured.

  FIG. 4 is an overall perspective view of the lens unit 190 incorporated in the lens frame 200 as seen from the back side. When the exterior member of the movie camera 100 is removed, as shown in FIG. 4, a unit in which the lens unit 190, the lens frame 200, and the lens stabilizer 210 are combined together is exposed.

  As shown in FIG. 4, both the lens R <b> 220 and the lens L <b> 230 constituting the lens unit 190 are fixed to the lens base 300. The lens base 300 is a thick single metal plate and is made of a rigid material such as stainless steel. In order to maintain the adjustment positions of the lens R220 and the lens L230, it is desirable that the lens base 300 has no rigidity as much as possible and has a high rigidity. The lens R220 is firmly screwed to the lens base 300 at three positions on the lower surface. Similarly, the lens L230 is firmly screwed to the lens base 300 at three locations on the lower surface. Thereby, it can be avoided that the lower surfaces of the lens R220 and the lens L230 are displaced from the lens base 300.

  Next, details of fixing the lower surface of the lens unit 190 will be described. FIG. 5 is an exploded perspective view of the lens frame 200, the lens unit 190, and the lens stabilizer 210 as seen from the back side.

  As described above, the lens R220 and the lens L230 constituting the lens unit 190 are strongly fixed to the lens base 300 which is a single metal plate. Base damper mounting pins 340 are arranged at four locations on the four corners of the lower surface of the lens base 300. On the other hand, the base unit mounting portion 202 of the lens frame 200 is provided with four base damper mounting holes. The four base damper attachment pins 340 arranged on the lens base 300 are fitted into the corresponding base damper attachment holes 350 via the lens base damper 310, respectively.

  Even if an impact is applied to the movie camera 100 by fixing the lens base 300 to the lens frame 200 via the lens base damper 310, the impact is absorbed by the damper, and the position of the lens base 300 with respect to the lens frame 200 is determined. Can be maintained. Further, the vibration caused by the lens driving of the lens R220 and the lens L230 is absorbed by the lens base damper 310, and the vibration caused by the lens driving can be prevented from being conducted to the lens frame 200. Therefore, it is possible to prevent noise due to lens driving vibration when collecting sound with the microphone.

  FIG. 6 is an exploded perspective view of the lens frame 200, the lens unit 190, and the lens stabilizer 210.

  As shown in FIG. 6, the lens frame 200 includes a lens attachment support portion 201 and a lens unit attachment portion 202. The lens mounting support portion 201 is formed so that it can be inserted with a margin in the space between the lens R220 and the lens L230. The lens unit mounting portion 202 is a base on which the lens unit 190 is mounted via the lens base 300. The lens mounting support part 201 and the lens unit mounting part 202 are not directly connected by a frame or the like, and there is a space. Therefore, when an impact from above or below is applied to the lens frame 200, the lens frame 200 may bend in the direction of narrowing the space between the lens mounting support portion 201 and the lens unit mounting portion 202. Therefore, in order to reinforce the strength against the bending, the lens stabilizer 210 is connected to the lens attachment support portion 201 via the engagement portion R240 and the lens unit attachment portion 202 via the engagement portion F250. Since the lens stabilizer 210 connects the lens mounting support portion 201 and the lens unit mounting portion 202, the strength against impact in the vertical direction can be reinforced.

  Further, the lower surface of the arm 212 of the lens stabilizer 210 and the upper surface of the lens mounting support portion 201 are fixed in contact with each other. At this time, the arm 212 is positioned by the pins provided in the lens mounting support portion 201 at two places: a hole located at the tip and a hole located immediately before bending to the arm 213. The lens stabilizer 210 is screwed to the front surface of the lens mounting support portion 201 and the front surface of the lens unit mounting portion 202 via screw holes provided in the arm 213. As a result, the positioned arm 212 is also fixed to the lens frame 200, and stable strength reinforcement against impact can be performed. Furthermore, by providing the arm 212 with a length that matches the length of the lens mounting support portion 201, it is possible to reinforce the strength more stably against the impact.

  As shown in FIG. 6, the lens stabilizer 210 has a mounting hole L320 and a mounting hole R320. On the other hand, in the lens unit 190, a damper mounting pin R350 is disposed on the upper surface of the lens R220, and a damper mounting pin L350 is disposed on the upper surface of the lens L230. The damper mounting pin R350 of the lens R220 is fitted into the mounting hole 330 via the damper rubber R280. Similarly, the damper mounting pin L340 of the lens L230 is fitted into the mounting hole L320 via the damper rubber L290. That is, the lens R220 and the lens L230 are bridged via the arm 211.

  Next, details of the arm 211 that bridges the lens R220 and the lens L230 of the lens unit 190 will be described with reference to FIG. FIG. 7 is a view for explaining a bridging portion of the lens unit 190.

  As shown in FIG. 7, the damper mounting pin L340 of the lens L230 is fitted with the mounting hole L320 by providing a certain amount of clearance L360 via the damper rubber L290. Similarly, although not shown, the damper mounting pin R350 of the lens R220 is fitted with the mounting hole 330 by providing a certain amount of clearance R370 via the damper rubber R280. The lens unit 190 is not directly crosslinked by the stabilizer 210, but is crosslinked via a damper rubber. Thereby, even if there is an impact, it can be absorbed by the damper rubber.

  Here, the significance of providing the clearance L360 and the clearance R370 will be described. In order to capture a 3D image that is favorable for viewing, position adjustment of the lens R220 and the lens L230 that form the two-lens lens unit 190 is extremely important, and high accuracy is required. As the position adjustment, there are a position adjustment for preventing the vertical displacement between the lens R220 and the lens L230, a position adjustment for determining a convergence angle, and the like. At this time, when the lens R220 and the lens L230 are bridged without providing the clearance L360 and the clearance R370, the lens R220 and the lens L230 whose positions have been adjusted with high accuracy are bridged with a strong load. Because it is necessary, the position may be shifted. On the other hand, when the lens R220 and the lens L230 are not cross-linked, when the movie camera 100 is dropped or shocked, the lens diameter of the lens R220 and the lens L230 and the weight of the lens cause A rotational moment may be generated with respect to the lens base 300, causing plastic deformation or mounting displacement of the mounting portions of the lens R220 and the lens L230 and the lens base 300, which may shift the combined position with high accuracy.

  Therefore, in the movie camera 100 according to the embodiment, a certain amount of clearance L360 and clearance R370 are provided to bridge the lens R220 and the lens L230. Accordingly, the lenses R220 and L230 can be cross-linked with a margin even without applying a strong load to cross-link. As a result, it is possible to prevent the lens position adjusted with high accuracy from shifting.

  The clearance L360 and the clearance R370 are desirably sized to absorb individual differences between the lens units 190 themselves and minute attachment differences during assembly of the lens units. On the other hand, if the clearance L360 and the clearance R370 are too large, there is a risk that they will be displaced during assembly or due to an impact. Therefore, it is desirable that the clearance L360 and the clearance R370 are sized within a range of deviation that can be allowed to capture a 3D image favorable for viewing.

  In the above description, the lenses R220 and the front end of the lens L230 are cross-linked with each other. However, the present invention is not limited to this. Preferably, the lens R220 and the lens L230 may be bridged at the center of gravity. Thereby, the bridge | crosslinking which can endure more impact can be performed.

  The present invention is not limited to the implementation on the movie camera 100. That is, the present invention can be applied to an imaging apparatus including a twin lens such as a digital still camera.

DESCRIPTION OF SYMBOLS 100 Movie camera 110 Lens part 120 Camera body part 130 Handle part 140 Manual ring part 190 Lens unit 210 Lens stabilizer 220 Lens R
230 Lens L

Claims (2)

A first lens unit having a lens for forming a subject image of a first viewpoint, and having a first bridged portion;
A second lens unit comprising a lens for forming a subject image of a second viewpoint different from the first viewpoint, and having a second bridged portion;
The first lens unit and the second lens unit, the lens base that fixes the other surface side of the surface having the first cross-linked portion and the second cross-linked portion,
The first cross-linked portion and the cross-linked portion that cross-links the second cross-linked portion,
One end of the bridging portion is disposed with a predetermined margin with the first bridging portion,
The other end of the bridging portion is arranged with a predetermined margin with the second bridging portion,
Imaging device. One end of the bridging portion is disposed with a first buffer member attached to the first bridging portion and a predetermined extra width,
The other end of the bridging portion is arranged with a second buffer member attached to the second bridging portion and a predetermined extra width,
The imaging device according to claim 1.

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