JPH01152875A - Image pickup device - Google Patents

Abstract

PURPOSE:To suppress picture deflection in rolling direction by constituting the titled device by a support means supporting a lens barrel and a hold means so that the optical axis of a pickup lens and the optical axis of a photoelectric conversion means are made coincident and a drive and lock means driving and locking the hold means. CONSTITUTION:In case of hand-carrying photograph by a video camera, the video camera is moved due to hand deflection or fatigue. Furthermore, in case of the photograph in an automobile by the video camera, the video camera is vibrated due to the vibration of the automobile or the like. Thus, the movement of photographed picture (so-called blur) takes place. The deviation of the drive member 14 supporting the image pickup element 13 attended with the movement of the video camera is detected by an angular velocity sensor 24 and a control circuit 25 supplies power to a motor 23 so that the output from the angular velocity sensor 24 is made zero. Thus, the rocking of the drive member 14 with respect to a photographing plane is eliminated and the picture blur around the optical axis is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a photographing device such as a video camera.

2. Description of the Related Art In recent years, with the spread of video tape recorders, there are many opportunities to use video cameras to take pictures, and there is a demand for a video camera that can perform stable camera work with less image blur even without the use of a camcorder. ing.

An example of the conventional photographing device described above will be described below with reference to the drawings. Conventionally, this type of photographing device has a fourth type as shown in, for example, Japanese Patent Application Laid-Open No. 53-64175.
The structure was as shown in the front and side views in Figure 5. That is, there is a rotor case 1 that houses a rotor that rotates at high speed at the center as a directional gyro, and this is supported by a horizontal gimbal 3 with left and right horizontal axes 2, and the horizontal gimbal 3 is further supported with a vertical gimbal 5 with left and right gimbal axes 4. is supported by Similarly, the rotor case 6 at the center of the vertical gyro is supported by a horizontal gimbal 7 and a vertical gimbal 8, and a video camera 9 and the like are installed on the rotor case 6. Therefore, by rotating the directional gyro stopper vertical gyro at high speed, the video camera 9 is stable even if the video camera support member is shaken and there is a shadow, and it is possible to obtain captured images with less image blur.

Problems to be Solved by the Invention However, with the above configuration, there is a problem in that although image blur in the pitching direction and panning direction can be suppressed, image blur in the rolling direction cannot be suppressed.

Means for Solving the Problems In order to solve the above problems, the photographing device of the present invention includes a photographing lens for photographing a subject, a lens barrel for holding the photographing lens, and an electrical signal for transmitting an optical image from the photographing lens. a photoelectric conversion means for converting into a photoelectric conversion means, a holding means for holding the photoelectric conversion means, a rotational support means for rotatably supporting the holding means so as to be rotatable in the plane of the optical axis around the optical axis, and an optical axis of the photographing lens. and a rotation locking means for rotating and locking the holding means. That is.

Effect of the Invention The present invention uses the above-described configuration to prevent image blurring in the rolling direction and to prevent image blurring in the rolling direction within a video camera. Image blur in the pitching direction, panning direction, and rolling direction can be easily suppressed by simply using the following photographing device. In addition, when there is no need to prevent image blur in the rolling direction, there is a rotation locking means that rotates and locks the holding means that holds the photoelectric conversion means, so even after locking, the image can be taken without any discomfort. In addition to this, it also becomes possible to take pictures with the shooting coordinates intentionally tilted.

Embodiment Hereinafter, a photographing apparatus according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a configuration diagram of the entire photographing device, and FIG. 2 is a view taken in the Y direction of FIG. 1. In FIGS. 1 and 2, a photographing lens 11 for photographing a subject is held in a lens barrel 12. As shown in FIG. Further, an image sensor 13 such as a CCD is provided on the focal plane of the photographic lens 11, and the image sensor 13 is attached to a rotating member 14 whose end face is formed of a gear. Further, the electrical signal converted from the optical image by the image sensor 13 is converted into a predetermined video signal by the video circuit 15.

A ball bearing 16 is press-fitted into the rotating member 14 , and the rotating shaft 18 is rotatably fitted to the picture ball bearing 16 from the frame 17 , and the rotating member 14 is rotatably connected to the frame 17 It has become. Here, a part of the rotating shaft 18 has a male screw,
A female thread is cut in the frame 17 so as to engage with it, and when the rotating shaft 18 is tightened, the rotating shaft 18 is attached to the ball bearing 1.
6, the rotating member 14 is pressed in the Y direction.

Further, a ball bearing 19 is press-fitted into the lens barrel 12, and a ring-shaped protrusion 14a provided on the rotating member 14 is rotatably fitted into the ball bearing 19.
is also rotatable relative to the lens barrel I2. Here, since the ball bearing 16° 19 is provided in the Y direction by the rotation shaft 18, play can be eliminated. Further, the rotation shaft 18 is hollow, and by passing the input/output line of the image sensor 13 through the hole 18a of the rotation shaft 18, the video circuit 1
5. Further, a magnet 20 that is magnetized in a predetermined manner is attached to the rotating member 14.

Here, the frame 17 is provided with a Hall element 21 facing the magnet 20 in order to detect the rotational position of the rotational member 14 . Further, a motor 23 having a worm 22 press-fitted onto its shaft is attached to the frame 17 so that the worm part of the worm 22 and the gear part formed on the rotating member 14 are in contact with each other. Furthermore, an angular velocity sensor 24 is attached to the rotating member 14 to detect the amount of rotation of the rotating member 14 .

The control circuit 25 drives and controls the motor 23 that rotates the rotating member 14 in the rolling direction so that the output signal of the angular velocity sensor 24 becomes zero, and also locks the motor 23 .

The photographing device configured as described above is shown in Fig. 1 below.
Its operation will be explained using FIG.

When taking pictures hand-held with a video camera, the video camera shakes due to camera shake or fatigue, and when taking pictures using a video camera from a car, etc., the video camera shakes due to the vibrations of the car. This causes shaking in the photographed image (so-called image blur). The angular velocity sensor 24 detects the shaking of the rotating member 14 holding the image sensor 13 due to the shaking of the video camera, and the control circuit 25 supplies power to the motor 23 so that the output from the angular velocity sensor 24 becomes zero. By supplying and controlling the rotating member 14 relative to the photographing plane.
This eliminates the shaking and reduces image blur around the optical axis. For example, if the lens barrel 12 swings in the rolling direction (in the direction of arrow R in FIG. 2), the rotating member 14 holding the image sensor 13 swings in the rolling direction along with the swinging. The control circuit 25 supplies power to the motor 23 so that the output of the angular velocity sensor 24 that detects shaking becomes zero, and controls the rotation of the rotating member 14 in the direction opposite to the direction of the arrow R, thereby causing rolling. Image blur in the direction can be suppressed.

Here, press the operation button 26 to turn off the image blur prevention effect.
When the control circuit 25 stops supplying electric power to the motor 23, the rotation of the rotation member 14 is stopped by the self-locking action of the worm and the wheel. Also,
When the operation button 26 is operated to turn on the image blur prevention effect, the control circuit 25 activates the motor 2 using the signal from the Hall element 21 for detecting the rotational position of the rotation member 14.
After power is supplied to the camera 3 and the rotating member 14 is rotated so that the coordinates of the camera and the coordinates of the image sensor 13 match, the image blur prevention state is established.

Further, when the operation button 26 is operated based on the signal from the Hall element 21 for detecting the rotational position of the rotation member 14, the control circuit 25 supplies power to the motor 23, and the coordinates of the camera and the image sensor 13 are Rotating member 1 so that
4 may be rotated, the supply of electric power to the motor 23 may be stopped, and the rotation of the rotating member 14 may be stopped.

Further, in this embodiment, the ball bearing 19 is press-fitted into the lens barrel 12 and fitted with the rotating member 14, but it may be press-fitted into the rotating member 14 and fitted with the lens barrel 12.

In addition, in this embodiment, the rotation of the rotating member is controlled to obtain an image blur prevention effect, but special effects (effects that shake or rotate the image without changing the camera posture, The rotation of the rotating member may be controlled so as to obtain a handstand image, etc.).

As described above, according to this embodiment, a photographic lens for photographing a subject, a lens barrel for holding the photographic lens, a photoelectric conversion means for converting an optical image from the photographic lens into an electrical signal, and a photoelectric conversion means are provided. A holding means for holding the holding means, a rotary support means for rotatably supporting the holding means so as to be rotatable around the optical axis, and a holding means for holding the holding means so that the optical axis of the photographic lens and the optical axis of the photoelectric conversion means coincide with each other. By comprising the support means that supports the lens barrel and the holding means, and the rotation locking means that rotates and locks the holding means, image blur in the rolling direction can be suppressed, and stable images can be obtained. You can get it. Therefore, the photographing device of this embodiment suppresses image blur in the rolling direction, and in order to suppress image blur in the rolling direction within a video camera, the present invention is added to an image blur prevention device having a conventional configuration. Image blur in the pitching direction, panning direction, and rolling direction can be easily suppressed by simply using a photographing device. Further, when the image blur prevention effect in the rolling direction is turned off, the rotating member that rotates in the rolling direction is locked, so even after the rotating member is locked, it is possible to take pictures without any discomfort. Furthermore, even if the power supply to the camera body is cut off due to an unpredictable event such as a power outage, the rotation of the rotating member is locked, so the camera can be carried safely.

Effects of the Invention As described above, there is provided a photographic lens for photographing a subject, a lens barrel for holding the photographic lens, a photoelectric conversion means for converting an optical image from the photographic lens into an electrical signal, and a holder for holding the photoelectric conversion means. means, rotation support means for rotatably supporting the holding means around the optical axis, and a lens barrel so that the optical axis of the photographing lens and the optical axis of the photoelectric conversion means coincide. The image blurring in the rolling direction can be suppressed by comprising the support means that supports the holding means and the rotation locking means that rotates and locks the holding means.
A stable image can be obtained. Therefore, in order to suppress image blur in the rolling direction and to prevent image blur in the rolling direction within the video camera, the photographing device of this embodiment incorporates the present invention into an image blur prevention device having a conventional configuration. Image blur in the pitching direction, panning direction, and rolling direction can be easily suppressed by simply using a photographing device. Furthermore, when the image blur prevention effect in the rolling direction is turned OFF, the rotating member that rotates in the rolling direction is locked, so even after the rotating member is locked, it is possible to take pictures without feeling any discomfort. Furthermore, even if the power supply to the camera body is cut off due to an unpredictable event such as a power outage, the rotation of the rotating member is locked, so the camera can be carried safely.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a photographing device in an embodiment of the present invention;
2 is a view taken in the Y direction of FIG. 1, FIG. 3 is a front view of a conventional pharyngeal imaging device, and FIG. 4 is a side view of a conventional imaging device. 12... Lens barrel, 13... Photoelectric conversion means, 14... Rotating member, 17...
Supporting means, 22...Rotation locking means.

Claims (1)

[Claims] a photographic lens for photographing a subject; a lens barrel for holding the photographic lens; a photoelectric conversion means for converting an optical image from the photographic lens into an electrical signal; a holding means for holding the photoelectric conversion means; and a holding means for holding the photoelectric conversion means. a rotary support means for rotatably supporting the means so as to be rotatable about the optical axis; What is claimed is: 1. A photographing device comprising: support means for supporting a holding means; and rotation locking means for rotating and locking the holding means.