JP2001033900A - Stereoscopic image pickup device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a stereoscopic image pickup device capable of rotating corresponding operation rings of two photographing lenses at the same speed. SOLUTION: In this stereoscopic image pickup device 10, two photographing lenses 12R and 12L are disposed by leaving specified space in between, and focus rings 14R and 14L, zoom rings 16R and 16L and iris rings 18R and 18L are provided on the lenses 12R and 12L. The corresponding operation rings are coupled by a gear coupling mechanism 22. The mechanism 22 is constituted by coaxially coupling a gear 42 meshed with the ring 14R and a gear 38 meshed with the ring 14L and the gears 42 and 38 are constituted so that their coupling angle can be adjusted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional imaging device, and more particularly to a three-dimensional imaging device that performs three-dimensional imaging using two photographing lenses having an operation ring.

[0002]

2. Description of the Related Art In a three-dimensional image pickup apparatus disclosed in Japanese Patent Publication No. 7-58386, two photographing lenses are arranged side by side at a predetermined interval on the left and right, and the same object is photographed by the two photographing lenses. Photographed at the same time. Each of the two photographing lenses is provided with a zoom ring for adjusting the zoom, and a driving motor for driving the zoom ring is attached to the left and right photographing lenses.
These drive motors are connected to a correction interface, and are controlled by the correction interface so that the angle of view of the left and right photographing lenses becomes equal.

[0003]

However, in the stereoscopic image pickup device disclosed in Japanese Patent Publication No. 7-58386, since the left and right photographing lenses have a drive unit, when high-speed zooming is performed, the load torque on the left and right photographing lenses is reduced. There is a disadvantage that a difference occurs and the left and right zoom rings rotate at different speeds. When the zoom rings rotate at different speeds, a problem occurs in that the angle of view is shifted between the left and right photographing lenses. As a result, there is a disadvantage that the obtained stereoscopic image becomes unnatural.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a three-dimensional image pickup apparatus capable of rotating corresponding operation rings of two photographing lenses at the same speed.

[0005]

According to a first aspect of the present invention, there is provided a three-dimensional image pickup apparatus comprising two photographing lenses having an operation ring arranged in parallel at a predetermined distance. , Corresponding operation rings of the two photographing lenses are connected by a gear transmission mechanism,
It is characterized by rotating in synchronization.

According to the first aspect of the present invention, the corresponding operation rings of the two photographing lenses are connected by the gear transmission mechanism, and the corresponding operation rings are rotated in synchronization with each other. Out of focus, angle of view, aperture, etc. can be prevented.

According to the second aspect of the present invention, the gear transmission mechanism is configured by connecting two gears coaxially, and the two gears are connected so as to be adjustable in angle. It is possible to prevent rattling when engaging with the operation ring of the taking lens.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a stereoscopic imaging apparatus according to the present invention will be described below in detail with reference to the accompanying drawings.

As shown in FIG. 1, a stereoscopic imaging apparatus 10 according to the present embodiment has two television cameras 11R and 11L arranged at a predetermined interval.
The subject is photographed by 11L. The image data of the photographed subject is recorded in the two recording / reproducing devices 13 and 13, respectively. The recorded image of the subject is projected on the screen 17 by the two projectors 15, 15,
By viewing the projected image through the polarizing glasses 23, a stereoscopic image can be obtained. Reference numeral 19 denotes a camera platform on which the television cameras 11R and 11L are mounted.
Is a tripod supporting the camera platform 19.

[0010] As shown in FIG.
Photographic lenses 12R and 12L are attached to R and 11L. Focus rings 14R, 14L and zoom rings 16R, 16R are provided on the taking lenses 12R, 12L.
L and iris rings 18R and 18L are provided, and teeth that mesh with the gears of the gear transmission mechanism 22 are formed on the outer peripheral surfaces of these operation rings.

Although not shown, the internal configuration of the photographing lenses 12R and 12L includes, for example, a fixed focus lens, a movable focus lens, a variable power lens system, an iris, a relay lens, and the like in order from the front. By rotating the focus rings 14R and 14L, the movable focus lens moves back and forth along the optical axis to perform focus adjustment.
By rotating R and 16L, the zoom lens system moves back and forth along the optical axis to perform zoom adjustment. Further, the iris aperture diameter is adjusted by rotating the iris rings 18R, 18L.

A drive unit 20 is provided on the side of the taking lens 12R. Drive unit 20
Has a focus driving motor 60, and the focus driving motor 60 is connected to the focus ring 14R via a gear 62. Further, the focus driving motor 60 is connected to a motor control circuit 64, and the motor control circuit 64
8 is connected. Thus, when the controller 68 is operated, the CPU 66 detects the operation signal and outputs a drive signal to the motor control circuit 64 to drive the focus drive motor 60 to rotate the focus ring 14R.

The drive unit 20 has a zoom drive motor 70, and the zoom drive motor 70
Are connected to the zoom ring 16R via a gear 72. Then, by operating the controller 68, the motor control circuit 74 drives the zoom driving motor 70 to rotate the zoom ring 16R.

Similarly, the drive unit 20 has an iris drive motor 76, and this iris drive motor 76 is connected to the iris ring 18R via a gear 78. By operating the controller 68, the motor control circuit 80 causes the iris drive motor 7 to operate.
6 is driven to rotate the iris ring 18R.

A gear transmission mechanism 22 is provided between the two photographing lenses 12R and 12L, as shown in FIG. The gear transmission mechanism 22 includes a focus ring 14R,
A focusing gear 24 connecting the 14Ls, a zoom gear 26 connecting the zoom rings 16R and 16L,
The iris rings 18R and 18L are composed of an iris gear 28 that connects the iris rings 18R and 18L.

As shown in FIGS. 3 and 4, the focusing gear 24 is connected to the photographing lenses 12R and 1R via a mounting plate 32.
It is attached to the convex portion on the outer peripheral surface of 2L. A shaft 34 protrudes from the mounting plate 32, and a gear 38 is fitted on the shaft 34 via a bearing 36. Teeth are formed on the outer peripheral surface of the gear 38 so as to mesh with the teeth of the focus ring 14L. A holding member 40 is screwed to the tip of the shaft 34, and the bearing 36 is prevented from coming off.

A gear 42 having the same size as the gear 38 is coaxially mounted on the gear 38. The gear 42 has
The arc-shaped long holes 44, 44 ... centered on the axis are formed,
A screw 46 is screwed into a screw hole 48 formed on the end face of the gear 38 through the elongated hole 44. Therefore, the screw 46
The gear 42 is fixed to the gear 38 by tightening
Is loosened, the gear 42 becomes rotatable with respect to the gear 38, and the angle of the gear 42 with respect to the gear 38 can be adjusted. After the gears 38 and 42 are engaged with the focus rings 14L and 14R in FIG. 3 in a state where the screw 46 is loosened, the gear 42 is fixed to the gear 38 by tightening the screw 46. Thereby, the gear 42 and the focus ring 14R, and the gear 38 and the focus ring 14R
L is securely engaged without rattling.

Although the detailed description of the zoom gear 26 is omitted, the gears 52 and 54 of the same size are connected coaxially and the gear 54 is The angle can be adjusted to 52. The gear 54 is fixed to the gear 52 with the gear 52 meshed with the zoom ring 16R and the gear 54 meshed with the zoom ring 16L.

Similarly, in the iris gear 28, a gear 56 and a gear 58 of the same size are connected coaxially so that the angle can be adjusted, and the gear 56 is an iris ring 18R and the gear 58 is an iris ring. The gear 58 is fixed to the gear 56 while meshing with the ring 18L.

Next, the operation of the stereoscopic image pickup device 10 having the above-described configuration will be described.

The three-dimensional image pickup apparatus 10 operates the controller 68 shown in FIG.
12L focus adjustment, zoom adjustment, and aperture adjustment are performed. For example, when performing focus adjustment, by operating the controller 68, the focus driving motor 60 is driven and the focus ring 1 of the photographing lens 12R is moved.
4R rotates. When the focus ring 14R rotates, the focus ring 14L connected to the focus ring 14R via the gear transmission mechanism 22 is driven to rotate. At this time, since the gears 38 and 42 have the same size, the focus rings 14R and 14L rotate at the same speed. Therefore, the left and right photographing lenses 12R, 12L
Is adjusted at the same speed, so that the left and right photographing lenses 12R and 12L are not out of focus.

Similarly, in the case of zoom adjustment, the zoom rings 16R and 16L have the same size gears 52 and 54.
By operating the controller 68, the left and right photographing lenses 12R and 12L
The zoom is adjusted at the same speed. Therefore, the angle of view of the left and right photographing lenses 12R and 12L does not shift.

Further, when the aperture is adjusted, similarly, the iris rings 18R and 18L have the same size of the gears 56 and 5L.
8, the left and right photographing lenses 12
The apertures of R and 12L are adjusted at the same speed.

As described above, the stereoscopic imaging apparatus 10 according to the present embodiment includes the focus rings 14R and 14L, the zoom rings 16R and 16L, the iris ring 18R,
Since the 8Ls are connected by the gear transmission mechanism 22, the corresponding operation rings of the left and right photographing lenses 12R and 12L are operated at the same speed. Therefore, the focus, angle of view, and aperture of the left and right photographing lenses 12R, 12L are always equal. Thereby, an accurate stereoscopic image can be obtained.

Further, the stereoscopic image pickup apparatus 10 according to the present embodiment
Since the gear coupling mechanism 22 is composed of two gears whose angle can be adjusted, rattling between the gears and the operation ring can be prevented. For example, in the focusing gear 24 shown in FIG. 4, since the gear 42 rotates with respect to the gear 38 by loosening the screw 46, the focus ring 14
The R and the gear 42 and the focus ring 14L and the gear 38 can be reliably engaged with each other. As a result, rattling when the focus ring 14R and the gear 42 and the focus ring 14L and the gear 38 are engaged can be prevented.

The structure of the gear transmission mechanism 22 is not limited to the above-described embodiment, but may be any as long as the operation rings of the two photographing lenses 12R and 12L are connected. For example, as shown in FIG. 5, each of the focus gear 24, the zoom gear 26, and the iris gear 28 may be configured by one gear.

In this case, by adjusting the angles of the operation rings of the photographing lenses 12R and 12L with respect to the lens barrel and then fixing the operation ring, rattling between the operation ring and the gears can be prevented.

In the above-described embodiment, the focus drive motor 60, the zoom drive motor 70, and the iris drive motor 76 are the gears 62, 72, 78, respectively.
Is rotated, the focus gear 24, the zoom gear 26, and the iris gear 28 may be rotated.

In the above-described embodiment, the focus ring 14, the zoom ring 16,
Although the example of the iris ring 18 has been described, the present invention is not limited to this, and may be, for example, an operation ring for adjusting a soft focus, an operation ring for changing a filter characteristic, or the like.

Further, in the above-described embodiment, the stereoscopic imaging device 10 is applied to a television camera for stereoscopic photography.
The present invention is not limited to this, but can be applied to a camera using two photographing lenses.

[0031]

As described above, according to the three-dimensional image pickup apparatus of the present invention, the corresponding operation rings of the two photographing lenses are connected by the gear transmission mechanism, so that the focus, the angle of view, the aperture, and the like of the two photographing lenses are shifted. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a stereoscopic imaging device according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram showing a main part of the stereoscopic imaging device shown in FIG.

FIG. 3 is a plan view of a main part of the stereoscopic imaging device shown in FIG. 2;

FIG. 4 is an explanatory diagram showing a configuration of a focusing gear shown in FIG. 3;

FIG. 5 is a schematic configuration diagram showing a gear transmission mechanism having a structure different from that of FIG. 2;

[Explanation of symbols]

10 stereoscopic imaging device, 12R, 12L photographing lens, 1
4R, 14L: Focus ring, 16R, 16L: Zoom ring, 18R, 18L: Iris ring, 20 ...
Drive unit, 22 ... gear transmission mechanism

Claims (5)

[Claims] 1. A stereoscopic imaging apparatus comprising two photographing lenses having an operation ring arranged in parallel at a predetermined distance, wherein the corresponding operation rings of the two photographing lenses are connected by a gear transmission mechanism. And a stereoscopic imaging device, which rotates in synchronization with the image. 2. The gear transmission mechanism includes a first gear that meshes with an operation ring of one of the two photographing lenses and a second gear that meshes with an operation ring of the other photographing lens. The stereoscopic imaging device according to claim 1, wherein the two gears are connected so as to be adjustable in angle, and are coaxially connected. 3. The stereoscopic imaging apparatus according to claim 1, wherein the operation ring is a focus ring for adjusting a focus. 4. The operation ring according to claim 1, wherein the operation ring is a zoom ring for adjusting a zoom.
The stereoscopic imaging device according to claim 1. 5. The operation ring according to claim 1, wherein the operation ring is an iris ring for adjusting an aperture.
The stereoscopic imaging device according to claim 1.