JP3504110B2 - Optical disk drive - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk device for continuously picking up an image of a subject, converting it into a video signal, and storing the video signal in an optical disk.

[0002]

2. Description of the Related Art With the recent spread of optical disc media, it is assumed that the video tape recorder device will be replaced with a video camera device using a disc that is superior in seek performance. For example, although a video camera device using an optical disk has been conventionally proposed for business use, it is expected that a portable video camera device as a handy type will shift from tape to disk recording such as an optical disk.

In the conventional handy type video tape recorders, there has been a problem that the video signal to be recorded becomes vibrating due to so-called "camera shake" and the contour line of the video object is blurred. . A method of correcting the camera shake and recording a video signal has been proposed.

First, as typical methods for detecting the camera shake, there are two types, ie, angular velocity detection and motion vector detection.

The method of detecting the angular velocity is to detect the yawing direction and the pitching direction, that is, the left and right blurring and the vertical blurring on the screen by an angular velocity sensor such as a gyroscope (hereinafter also referred to as a gyro). Is.

A conventional camera shake detection device using a gyro will be described with reference to FIG. First, the rotational angular velocities of the image pickup screen 53 in the horizontal direction and the vertical direction are detected by the angular velocity sensors 54 and 55, which are gyroscopes, for example, and the detected values are sent to the shake detection circuit 56. Then, these detected values are filtered and amplified by the shake detection circuit 56, further integrated, and converted into a rotation angle (also referred to as a shake angle). Based on these blur angles, the correction determination circuit 57 determines whether the blur angle is caused by a pan or the like intended by the photographer or camera shake. If it is determined to be a camera shake, the imaging lens 5
1 is collected by, for example, CCD (Charge Conpled D
The video signal converted into an electric signal by the image pickup device 52 composed of an evice) is corrected by the video signal correction circuit 58. Then, the corrected video signal is sent to and recorded in a video signal recording device such as an optical disk device.
If the blur angle is not camera shake, the image sensor 52
The video signal which is the output of is output from the video signal correction circuit 58 to the video signal recording device without being corrected and is recorded.

Generally, the rotation angle (blurring angle) generated by the above hand shake has a time-series waveform as shown in FIG.
It has been found that vibrational components of relatively low frequency dominate. Therefore, the shake detection circuit 56 obtains the rotation angle based on the rotation angular velocities detected by the gyros 54 and 55, and the rotation angle data is corrected by the correction determination circuit 57.
It is possible to determine whether or not the camera shake is caused by breaking the waveform.

As a practical correction method when the rotation angle is caused by camera shake, an image is obtained by slightly moving a correction lens or an optical element provided in the optical system according to the shake angle. It is typical to form an image without blur on the light receiving surface of the element.

FIG. 9 shows the configuration of a video camera device with a built-in optical disc device, which is constructed using the above-mentioned camera shake detection device. Video signal correction circuit 58 of camera shake detection device
The video signal from is sent to the video signal recording device 50 via the video signal recording control circuit 60 and recorded on the optical disc 1. The configuration and operation of the video signal recording device 50 will be described in detail in the embodiments described later, and will not be described here.

On the other hand, in the motion vector detection method, for example, a CCD (imaging device) surface slightly larger than the screen used for recording is prepared, five areas are provided on this CCD surface, and the screen in each area is displayed. Detect motion.
If the movement direction of the screen in each area is different, it is determined that the subject is moving, and if the movement is the same, it is determined that the image is blurred. In this method as well, blurring correction is similarly performed after determining whether the screen blur is due to camera shake or the intention of the photographer. Blurring correction by this motion vector detection method is performed by cutting out the screen of the portion moved due to blurring from the CCD screen that is additionally secured.

At present, the angular velocity detection method is more frequently used with the downsizing of gyros and the like.

[0012]

As described above, the so-called portable video camera device has a problem that the quality of the video signal is deteriorated due to camera shake. This is particularly noticeable in handy-type video camera devices, since the camera rotates around the wrist and the like, unlike the case where a professional video camera device is used to take an image on the shoulder of the photographer. is there. Conventionally, in order to avoid the influence of this camera shake, a sensor is provided, or the movement of the subject on the imaging screen is detected to first detect the blur angle, and it is determined whether this is a camera shake or a panic intended by the photographer. However, the method of correcting has been taken.

According to such a method, it is very difficult to judge whether it is the intended pan or camera shake, the provision of a sensor complicates the structure and increases the cost, and the detection itself is accurate. There was a problem that it could not be done. For example, in the method of detecting the movement of the subject on the imaging screen, the movement of the subject depends on the ambient brightness, and the reliability of the detection itself cannot be increased.

With the recent generalization of optical disc media, there has been proposed an optical disc device for easily recording or reproducing image information collected by a portable video camera device on an optical disc.

Even in an optical disk device that continuously captures an image of such a subject, converts it into a video signal, and stores this video signal in an optical disk, a camera shake that deteriorates the quality of the video signal can be detected accurately and easily, and It is desired to record a video signal that is not affected by this camera shake.

The present invention has been made in consideration of the above circumstances, and is an optical disk capable of accurately and easily detecting camera shake and recording a high-quality video signal which is not affected by the camera shake. The purpose is to provide a device.

[0017]

An optical disk device according to the present invention comprises: a rotation driving means for rotating an optical disk having an information recording track; an optical beam generating means for generating an optical beam; and an optical recording medium on the information recording surface of the optical disk. An optical head having spot forming means for condensing a beam to form an optical beam spot, and a light detecting means for detecting reflected light of the optical beam spot from the optical disc; and the optical head formed by the spot forming means. Error detecting means for detecting the position error and the focus error of the optical beam spot with respect to the target track of the optical disc based on the output of the photodetecting means, and the spot forming means to form the information recording surface of the optical disc. Adjusting means for focusing an optical beam spot, and the optical disc Displacement adjusting means for driving the optical head so as to displace the optical beam spot formed on the information recording surface in the transverse direction of the information recording track of the optical disc, and outputting a first signal with which the position error becomes zero. Tracking compensation means, a focus compensation means for outputting a second signal with which the focus error is zero, a first control means for driving and controlling the displacement adjusting means based on the first signal, Video signal recording means for recording a video signal on the information recording surface of the optical disc, the first and second control means for driving and controlling the focus adjusting means based on the second signal. Disturbance acceleration calculating means for calculating the acceleration of the disturbance vibration based on at least one of these signals, and imaging for converting an optical signal incident through the imaging lens into a video signal. A recording element, a correcting means for correcting the video signal based on the output of the disturbance acceleration calculating means, and a recording controlling the video signal recording means for recording the output of the correcting means on the information recording surface of the optical disc. And a control means.

[0018]

According to the optical disk device of the present invention thus constructed, the acceleration component of the disturbance vibration applied to the main body of the optical disk device is given to the optical head as relative acceleration. This relative acceleration acts to move the optical head, but the optical head is held by the focus adjusting means and the displacement adjusting means so that the above movement does not occur. This means that the first and second signals output from the tracking compensating means and the focus compensating means include a component for compensating for the relative acceleration.

Therefore, the acceleration of the disturbance vibration is accurately and simply calculated by the disturbance addition degree calculating means based on at least one of the first and second signals. Based on the calculated degree of addition, it is possible to accurately and easily determine whether or not the disturbance vibration is due to camera shake. Thus, if it is determined that the image is due to camera shake or the like, if the image signal is corrected by the image signal correction means, it becomes possible to obtain a high quality image signal that is not affected by the camera shake, and this high quality image signal is recorded on the optical disc. Can be recorded.

The correction means includes a shake detection means for detecting the shake amount of the video signal converted by the image pickup device, and a judgment means for judging whether or not the video signal should be corrected based on the output of the disturbance acceleration calculation means. May be provided, and the video signal may be corrected based on the amount of blur when it is determined that correction should be performed.

Further, the video signal correction means detects the blur amount of the video signal converted by the image sensor based on the output of the disturbance acceleration calculation means, and the video signal based on the output of the blur detection means. And a determination means for determining whether or not should be corrected, and when it is determined to be corrected, the video signal may be corrected based on the blur amount.

The video signal correction means detects the blur amount of the video signal converted by the image pickup device based on the output of the disturbance acceleration calculation means, and the video signal based on the output of the disturbance acceleration calculation means. It may be configured to include a determination unit that determines whether or not to correct, and to correct the video signal based on the blur amount when it is determined to correct.

Further, it is preferable that the video signal recording means is arranged such that the tracking direction of the optical head is the horizontal direction of the image pickup screen and the focus direction of the optical head is the vertical direction of the image pickup screen.

Further, it is preferable that the video signal recording means is arranged so that the tracking direction of the optical head is the vertical direction of the image pickup screen and the focus direction of the optical head is the horizontal direction of the image pickup screen.

Further, the optical disk device of the present invention is such that the rotation driving means for rotating the optical disk having the information recording track, the optical beam generating means for generating the optical beam, and the optical beam focused on the information recording surface of the optical disk. Of the optical beam spot formed by the spot forming means, and an optical head having a spot forming means for forming an optical beam spot, and a light detecting means for detecting reflected light of the optical beam spot from the optical disc. Error detection means for detecting a position error and a focus error with respect to a target track of the optical disc based on the output of the light detection means, and an optical beam spot formed on the information recording surface of the optical disc by driving the spot forming means. Focusing means for adjusting the focus of the optical disc and the information recording surface of the optical disc. Displacement adjusting means for driving the optical head so as to displace the optical beam spot to be displaced in the transverse direction of the information recording track of the optical disc, and tracking compensating means for outputting the first signal with which the position error becomes zero. A focus compensating means for outputting a second signal with which the focus error becomes zero; a first control means for driving and controlling the displacement adjusting means based on the first signal; and a second signal based on the second signal. Second control means for driving and controlling the focus adjustment means, and a video signal recording means for recording a video signal on the information recording surface of the optical disc, and a blur of the video signal converted by the image sensor. Blur angle detection means for detecting the angular velocity, correction means for correcting the video signal based on the output of the blur angular velocity detection means, and the supplementary information on the information recording surface of the optical disc. Recording control means for controlling the video signal recording means to record the output of the means, and a disturbance acceleration is obtained based on the output of the shake angular velocity detecting means, and when the obtained disturbance acceleration exceeds a predetermined value. Recording stop means for sending a stop command signal to the first and second control means and the recording control means to stop the operation may be provided.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the configuration of the first embodiment of the optical disk device according to the present invention. The optical disk device according to this embodiment includes a video signal recording device 50 and an imaging lens 51.
An image pickup element 52, an image pickup screen 53, angular velocity detection sensors 54 and 55 formed of, for example, a gyro, a shake detection circuit 56, a correction determination circuit 57, and a video signal correction circuit 58.
A disturbance acceleration calculation circuit 59 and a video signal recording control circuit 60.

The optical information transmitted through the image pickup lens 51 is converted into a video signal by the image pickup element 52, and this video signal is input to the video signal correction circuit 58. The video signal input to the video signal correction circuit 58 is corrected as described later and transmitted to the video signal recording control circuit 60 as a video signal to be recorded.

In the video signal recording device 50 controlled by the video signal recording control circuit 60, a large number of information recording tracks are formed on the information recording surface of the optical disk 1 in a spiral or concentric pattern. The optical disk 1 is rotationally driven by the disk motor drive control device 3.

The reproduction of the information recorded on the optical disc 1 and the recording of the information on the optical disc 1 are performed by the optical head 4.
Is performed by focusing the optical beam on the information recording surface of the optical disc 1.

In the optical head 4, the light from the semiconductor laser oscillator 5 is collimated by the collimator lens 6, passes through the polarization beam splitter 7, passes through the λ / 4 plate 8 and is reflected by the mirror 9. Then, the reflected light passes through the objective lens 10 and forms a light spot on the optical disk 1 which is rotating steadily. The light reflected from the optical disk 1 returns to the polarization beam splitter 7 via the objective lens 10, the mirror 9 and the λ / 4 plate 8, is reflected by the polarization beam splitter 7 and enters the split photodetector 12 via the lens 11. To do. The light incident on the split photodetector 12 is photoelectrically converted by the split photodetector 12, and the photoelectrically converted signal is converted into a sum signal and a tracking error signal by an adder / subtractor amplifier circuit 13. At the same time, the light reflected by the polarization beam splitter 7 is photoelectrically converted by the split photodetector 12 and then converted into a focus error signal by the adder / subtractor amplifier circuit 13.

The tracking error signal obtained here is input to the tracking compensation circuit 14 and amplified,
It is converted into a coarse actuator drive signal and a fine actuator drive signal. Of these, the coarse actuator drive signal is input to the coarse actuator drive control circuit 15, and the fine actuator drive signal is input to the fine actuator drive control circuit 17. The coarse actuator drive control circuit 15 is
The fine actuator 16 is driven to roughly position the optical head 4 or a part thereof in the cross-track direction based on the coarse actuator drive signal. On the other hand, the fine actuator drive control circuit 17 drives the fine actuator 18 in the cross-track direction to displace the objective lens 10 based on the input fine actuator drive signal so that the optical beam spot is formed on the target track. Precise positioning.

On the other hand, the focus actuator signal is input to the focus compensation circuit 20, amplified and filtered, and converted into a focus actuator drive signal. This drive signal is input to the focus actuator drive control circuit 21, and the objective lens or a movable portion including the objective lens is positioned by the focus actuator 22 in the disc rotation axis direction to form an optical beam spot formed on the information recording surface of the disc 1. Adjust the focus of.

When such an optical disk device receives a disturbance vibration, the disturbance acceleration due to the disturbance vibration acts on the optical head 4. This disturbance acceleration acts as relative acceleration that moves the optical head 4 in the track crossing direction, for example, but since it is actually positioned by the coarse actuator 16, it is held so that movement due to relative acceleration does not occur. At this time, the driving force for compensating the acceleration is input to the drive control circuits 15, 17, 21 of the actuator. That is, it is possible to estimate the disturbance acceleration applied to the optical disk device itself from the driving force, that is, the driving signals of the driving control circuits 15, 17, and 21.

In the optical disk device of the present embodiment, the disturbance acceleration calculation circuit 59 calculates the disturbance acceleration based on the drive signals of the drive control circuits 15, 17, and 21, and the disturbance vibration is calculated using the calculated disturbance acceleration. Is configured to be prevented from being mixed in the video signal.

This will be described below.

As shown in FIG. 1, the focus drive signal, the coarse actuator drive signal, and the fine actuator drive signal are input to the disturbance acceleration calculation circuit 59, respectively. Here, first, the components of the drive signal in a relatively low frequency region, as a guide, the frequency components in the vicinity of 20 Hz or less are extracted by a low-pass filter or the like. After this component is extracted, it is extracted and distributed as acceleration components corresponding to the left-right direction and the up-down direction with respect to the image pickup screen 53 of the video camera.

Low frequency component of the drive signal of the optical head,
That is, the low-frequency acceleration component represents the acceleration component received by the video signal recording device 50 including the optical head 4 from the outside. The acceleration received by the video signal recording device 50 from the outside is substantially equal to the acceleration received by the optical disk device itself. The disturbance acceleration signal received by the optical disk device thus detected is input to the correction determination circuit 57.

On the other hand, in this embodiment, the angular velocity sensors 54 and 55 such as a gyro for detecting the circuit angular velocity of the optical disk device itself already exist. This angular velocity sensor 54,
The output of 55 is input to the blur detection circuit 56 as the rotational angular velocities of the captured image 53 in the horizontal direction and the vertical direction, and the blur displacement of the optical disk device itself is detected as a rotational angle obtained by integrating the rotational angular velocity once. When this optical disk device is used as a handy type video camera device in particular, the displacement caused by camera shake or the like can be approximately captured as a rotation angle around the wrist of the photographer.

The disturbance displacement thus detected is input to the correction judgment circuit 57. The correction determination circuit 57 determines whether the blur angle detected by the blur detection circuit 56 is a pan intended by the photographer or a camera shake. At this time, the disturbance acceleration signal input from the disturbance acceleration calculation circuit 59 is used as a reference, but since this determination has been conventionally made only by the angular velocity or the rotation angle which is the output signal of the shake detection circuit 56, the hand shake and the panning are detected. It was difficult to tell the difference.

Further, conventionally, a judgment by high-level signal processing etc. was required, but by using the disturbance acceleration signal, the judgment can be easily made. That is, the acceleration generated by camera shake has a waveform that continuously oscillates as shown in FIG. 2B, and the acceleration generated by one of the pans exhibits an impulse-like time response as shown in FIG. 2A. It is a thing. It becomes possible to judge the difference between camera shake and panning by referring to the waveform pattern of the disturbance acceleration, and it is generally complicated by correcting the video signal by judging the camera shake using the acceleration signal applied to the optical disk device itself. It is possible to obtain an optical disc device that can surely and quickly make a shake correction that needs various processing and a determination to make the correction, and can perform the shake correction accurately.

When the correction determination circuit 57 determines that the correction is to be performed, the video signal collected by the imaging lens 51 and converted by the image sensor 52 is corrected by the video signal correction circuit 58 to record the video signal. It is output to the control circuit 60.

FIG. 3 shows a block diagram when the optical disk device of this embodiment is used as a video camera device.

In the video camera device 100, as shown in FIG. 3 (a), when the grip portion 104 held by the photographer during photographing is arranged so that the x-axis direction of the device 100 and the imaging direction 101 are the y-axis direction. The built-in video signal recording device 5
0 is the vertical direction of the imaging screen when viewed from the viewfinder 102, that is, the z-axis direction, as shown in FIG.
If the tracking direction is arranged in the left-right direction of the image pickup screen viewed from the viewfinder 102, that is, the x-axis direction, the disturbance acceleration in the vertical direction of the image pickup screen is determined based on the drive signal from the focus compensation circuit 20 and the image pickup screen. The disturbance acceleration in the left-right direction can be easily obtained by the disturbance acceleration calculation circuit 59 based on the drive signal from the tracking compensation circuit 14.

As described above, according to the optical disk device of the present embodiment, camera shake can be detected accurately and easily, and a high-quality video signal which is not affected by this camera shake is recorded. can do.

Next, FIG. 4 shows the configuration of the second embodiment of the optical disk device according to the present invention. The optical disc device according to the second embodiment is obtained by removing the angular angle sensors 54 and 55 from the optical disc device according to the first embodiment, and blur detection is performed based on the output of the disturbance acceleration calculation circuit 59. It is composed.

In this embodiment, similarly to the first embodiment, the acceleration signal calculated by the disturbance acceleration calculation circuit 59 and distributed to the horizontal acceleration and the vertical acceleration of the image pickup screen 53 is It is inputted to the blur angle detection circuit 56, integrated two-dimensionally, and converted into a disturbance displacement. That is, the acceleration component received from the outside is distributed in the vertical and horizontal directions of the imaging screen 53, and these distributed accelerations are respectively integrated to obtain the imaging screen 53.
The displacement of the optical disk device in the vertical and horizontal directions can be calculated. Further, the calculated displacement amount is calculated by the correction determination circuit 57.
Is input to the image signal correction circuit 58, and when it is determined based on the waveform pattern of the displacement amount that the image is caused by camera shake or the like, the image pickup lens 5
By correcting the video signal collected by 1 and converted by the image sensor 52 according to the displacement, a video signal that is not affected by camera shake or the like is generated by the video signal recording control circuit 60.
It is configured to be sent to.

It goes without saying that the optical disk device of the second embodiment also has the same effect as that of the first embodiment. Further, since the optical disk device of the second embodiment does not require the angular velocity sensor, it has a compact structure and is inexpensive as compared with the first embodiment.

In the second embodiment, the judgment in the correction judgment circuit 57 may be made by the waveform pattern of the acceleration signal calculated by the disturbance acceleration calculation circuit 59.

Here, as shown in FIG. 5, the optical disk device is arranged so that, for example, the focus direction is the vertical direction of the photographing screen of the finder 102, that is, the z direction, and the tracking direction is the horizontal direction of the photographing screen of the finder 102, that is, the x direction. With this configuration, the amount of displacement caused by the blur can be estimated very accurately as described in the first embodiment, and the blur can be almost corrected. by this,
In particular, a special sensor such as an angular velocity sensor is provided to avoid the problem that the size cannot be reduced and the influence of camera shake can be suppressed.

Similarly, the same effect can be obtained by configuring the focus direction to be the left-right direction of the photographic screen of the finder 102, that is, the x direction, and the tracking direction to be the vertical direction of the finder 102, that is, the z direction. It is possible.

In the first and second embodiments, the drive signal input to the disturbance acceleration calculation circuit 59 is
Only the focus actuator drive signal may be used, or only the fine actuator and coarse actuator drive signals may be used.

In the first and second embodiments, the camera shake is accurately and simply detected based on the control signal of the optical head 4 and the camera shake is corrected. When the blur acceleration exceeds a predetermined value during recording, the actuator drive control circuit that drives the optical head 4 may be controlled to stop the recording. This will be described below as a third embodiment.

FIG. 6 shows the configuration of the third embodiment of the optical disk device according to the present invention. The optical disk device of the third embodiment is the conventional optical disk device shown in FIG. 9 provided with a recording stop circuit 70. This recording stop circuit 7
0 determines the disturbance acceleration based on the detection values of the angular velocity sensors 54 and 55, and only when the absolute value of the disturbance acceleration exceeds a predetermined value, the coarse actuator drive control circuit 15, the fine actuator drive control circuit 17, the focus actuator. A stop command signal is sent to the drive control circuit 21 and the video signal recording control circuit 60 to stop the recording operation.

Here, the disturbance acceleration means the blurring angular acceleration, and is the one obtained by differentiating the outputs of the angular velocity sensors 54 and 55 with respect to time. Instead of obtaining the angular acceleration, the outputs of the angular velocity sensors 54 and 55 are sampled at a predetermined timing (equal time) to obtain the absolute value of the difference between the angular velocities, that is, the absolute value of the difference between the current sampling value and the previous sampling value. The recording operation may be stopped based on this absolute value.

In general, the optical disk device is designed to be weak against a large disturbance acceleration. However, if it is configured as in this embodiment, even if a large disturbance acceleration is applied when a video signal is recorded on the optical disc. It is possible to prevent the already recorded data from being accidentally erased, and it is possible to prevent the data from being recorded on a track different from the predetermined track.

Although the blur angular acceleration is used as the disturbance acceleration in the third embodiment, the blur angular velocity or the blur angle may be used instead.

It goes without saying that the recording stop circuit 70 used in the third embodiment may be used in the optical disk device of the first or second embodiment.

[0059]

As described above, according to the present invention, camera shake can be detected accurately and easily, and a high-quality video signal which is not affected by the camera shake can be obtained. You can

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a first embodiment of an optical disc device according to the present invention.

FIG. 2 is a waveform diagram of an acceleration pattern for determining whether a camera shake occurs.

FIG. 3 is a diagram illustrating an arrangement in which camera shake can be easily detected when the optical disk device according to the first embodiment is used as a video camera device.

FIG. 4 is a block diagram showing a configuration of a second embodiment of an optical disc device according to the present invention.

FIG. 5 is a diagram illustrating an arrangement in which hand shake can be easily detected when the optical disk device according to the second embodiment is used as a video camera device.

FIG. 6 is a block diagram showing the configuration of a third embodiment of an optical disc device according to the present invention.

FIG. 7 is a block diagram showing a configuration of a conventional camera shake detection device.

FIG. 8 is a waveform diagram showing an example of a camera shake waveform.

FIG. 9 is a block diagram showing the configuration of a conventional video camera device capable of detecting camera shake.

[Explanation of symbols]

1 optical disc 2 disk motor 3 Disk motor drive control circuit 4 Optical head 5 Semiconductor laser oscillator 6 Collimating lens 7 Polarizing beam splitter 8 λ / 4 plate 9 mirror 10 Objective lens 11 lenses 12-split photodetector 13 Addition / subtraction amplifier circuit 14 Tracking compensation circuit 15 Coarse actuator drive control circuit 16 Coarse actuator 17 Precision actuator drive control circuit 18 Precision actuator 20 Focus compensation circuit 21 Focus actuator drive control circuit 22 Focus actuator 50 Optical disk device 51 Imaging lens 52 Image sensor (CCD) 53 Imaging screen 54 Angular velocity sensor (gyro) 55 Angular velocity sensor (gyro) 56 Camera shake detection circuit 57 Correction judgment circuit 58 Video signal correction circuit 59 Disturbance acceleration calculation circuit 60 Video signal recording control circuit 70 Recording stop circuit

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI G11B 33/06 G11B 33/06 MH04N 5/225 H04N 5/225 F 5/232 5/232 Z (58) Fields investigated (58) Int.Cl. ⁷ , DB name) H04N 5 / 225,5 / 76-5/775 H04N 5 / 781,5 / 85 H04N 5/91-5/956 G11B 7 / 00,7 / 004,7 / 09, 7/095 G11B 19 / 02,19 / 04,33 / 06

Claims (5)

(57) [Claims] 1. A rotation driving means for rotating an optical disk having an information recording track, an optical beam generating means for generating an optical beam, and an optical beam spot formed by condensing the optical beam on an information recording surface of the optical disk. An optical head having a spot forming means and a light detecting means for detecting reflected light of the optical beam spot from the optical disc, and a position of the optical beam spot formed by the spot forming means with respect to a target track of the optical disc. Error detection means for detecting an error and a focus error based on the output of the light detection means, and a focus adjustment for driving the spot forming means to focus an optical beam spot formed on the information recording surface of the optical disc. Means and an optical beam spot formed on the information recording surface of the optical disc, Displacement adjusting means for driving the optical head so as to displace in the transverse direction of the information recording track of the optical disc, tracking compensation means for outputting a first signal with which the position error is zero, and the focus error is zero. A focus compensating means for outputting a second signal, a first control means for driving and controlling the displacement adjusting means based on the first signal, and a focus adjusting means for driving the focus adjusting means based on the second signal. Video signal recording means for recording a video signal on the information recording surface of the optical disc, and second control means for controlling, based on at least one of the first and second signals. Disturbance acceleration calculating means for calculating the acceleration of the disturbance vibration, an image sensor for converting an optical signal incident through the imaging lens into a video signal, and an output based on the output of the disturbance acceleration calculating means. A correction means for correcting the video signal, and a recording control means for controlling the video signal recording means to record the output of the correction means on the information recording surface of the optical disc. Optical disk device. 2. The blur correction means for detecting the blur amount of the video signal converted by the image sensor based on the output of the disturbance acceleration calculation means, and the blur detection means based on the output of the blur detection means. The optical disc according to claim 1, further comprising: a determination unit that determines whether or not the video signal should be corrected, and corrects the video signal based on the blur amount when it is determined that the video signal should be corrected. apparatus. 3. The blur correction means for detecting the blur amount of the video signal converted by the image sensor based on the output of the disturbance acceleration calculation means, and the correction means based on the output of the disturbance acceleration calculation means. The optical disc according to claim 1, further comprising: a determination unit that determines whether or not the video signal should be corrected, and corrects the video signal based on the blur amount when it is determined that the video signal should be corrected. apparatus. 4. The video signal recording means is arranged such that the tracking direction of the optical head is the left-right direction of the imaging screen and the focusing direction of the optical head is the vertical direction of the imaging screen. The optical disk device according to claim 1. 5. The video signal recording means is arranged such that a tracking direction of the optical head is a vertical direction of an image pickup screen and a focus direction of the optical head is a horizontal direction of the image pickup screen. The optical disk device according to claim 1.