JPH0876161A - Shake correction device - Google Patents

Abstract

(57) [Summary] [Purpose] If shake correction is not required after exposure,
The shake correction is stopped without the operation of the photographer to prevent unnecessary power consumption. Is to provide. [Configuration] The body microcomputer 25 stops the shake correction control (S411) when the exposure control ends (S411) during execution of the shake correction control (S409).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shake correction device having a shake correction function.

[0002]

2. Description of the Related Art Conventionally, an AF device has been generally used in a photographing device typified by a camera, and it has been proposed to add a shake correction device for correcting hand shake. The shake correction device is a device that detects a change in the angle of the optical axis due to camera shake or the like, and corrects a captured image by this.
For example, JP-A-2-66535 (an example of a single lens optical system) and JP-A-2-183217 (an example of image correction by shifting a part of a photographing optical system of an internal focusing type telephoto lens) are known. There is.

[0003]

However, in the above-described conventional shake correction apparatus, the shake correction control is continuously executed even if it is not necessary to continue the shake correction control after the exposure control is completed. Therefore, there is a problem that an operation of releasing the shake correction control operation determining unit that determines whether or not to execute the shake correction control is required, and unnecessary power consumption is performed during that time.

Further, in the conventional shake correction apparatus, if the shake correction control is uniformly stopped after the exposure control is finished, a picture without shake correction may be taken when performing continuous shooting. Another problem arises in that the shake correction control operation determining unit must be operated again.

It is an object of the present invention to provide a shake correction apparatus which prevents the shake correction from being stopped without the operation of the photographer when the shake correction is not required after the exposure is finished, thereby preventing unnecessary power consumption. Is to provide.

Another object of the present invention is to provide a shake correction apparatus which does not require the shake correction control operation determining section to be actuated again when shake correction is required after the exposure is completed.

[0007]

In order to solve the above-mentioned problems, the present invention according to claim 1 provides a photographing optical system, a shake detecting section for detecting shake of an optical axis of the photographing optical system, and the photographing optical system. Based on the output of the shake correction drive unit that relatively shifts a part or all of the system and the shooting screen, and the shake detection unit,
In a shake correction apparatus including a shake correction control unit that generates a shake correction control signal of the shake correction drive unit, when the exposure control ends during execution of the shake correction control, the shake correction control is stopped. Is characterized by.

According to a second aspect of the present invention, in the shake correction apparatus according to the first aspect, a stop mode for stopping the shake correction control at the end of the exposure control and a continuation of continuously performing the shake correction control at the end of the exposure control It is characterized by having a mode switching unit capable of switching between modes.

[0009]

According to the first aspect of the present invention, when the exposure control is finished during execution of the shake correction control, the shake correction control is stopped. Therefore, the photographer again asks the shake correction control operation determining section. There is no need to perform the operation for canceling, and unnecessary power consumption is eliminated.

According to the second aspect of the present invention, the mode switching unit switches between a stop mode for stopping the shake correction control at the end of the exposure control and a continuous mode for continuously performing the shake correction control at the end of the exposure control. Since it is possible, if the mode to be selected is selected in advance, it is not necessary to operate the shake correction control operation determination unit again after the exposure is completed.

[0011]

Embodiments will be described in more detail below with reference to the drawings and the like. FIG. 1 is a block diagram showing a first embodiment of a shake correction apparatus according to the present invention, and FIG.
FIG. 3 is a schematic diagram showing a configuration including a photographing optical system of a shake correction apparatus according to a first example.

This shake correction device is incorporated in a photographing device (see FIG. 3) which is composed of a lens device 1 and a body device 2, and the lens device 1 includes an image stabilization control microcomputer 3, An ultrasonic motor microcomputer 16 and a communication microcomputer 24 are provided, and the body device 2 is provided with a body microcomputer 25 and the like.

The image stabilization control microcomputer 3 drives a shake correction drive based on the output of the body microcomputer 25 of the body device 2 and the optical system position information from the encoders (5, 9, 15, 22, etc.). Section (X-axis drive motor 7, X-axis motor driver 8, Y-axis drive motor 11,
This is for controlling the drive of the Y-axis motor driver 12 and the like.

The lens contact 4 is a group of electrical contacts used for exchanging signals with the body device 2, and is connected to the communication microcomputer 24.

The X encoder 5 is for detecting the amount of movement of the optical system in the X-axis direction, and its output is connected to the X encoder IC 6. The X encoder IC6 is
It is for converting the amount of movement of the optical system in the X-axis direction into an electric signal, and the signal is sent to the image stabilization control microcomputer 3. The X-axis drive motor 7 is a drive motor that shifts and drives the X-axis image blur correction optical system. The X-axis motor driver 8 is a circuit that drives the X-axis drive motor 7.

Similarly, the Y encoder 9 is for detecting the amount of movement of the optical system in the Y-axis direction, and its output is connected to the Y encoder IC 10. The Y encoder IC 10 is for converting the amount of movement of the optical system in the Y-axis direction into an electric signal, and the signal is sent to the image stabilization control microcomputer 3. Y-axis drive motor 11
Is a drive motor that shifts and drives the Y-axis image blur correction optical system. The Y-axis motor driver 12 is a circuit that drives the Y-axis drive motor 11.

The image stabilization head amplifier 13 is a circuit for detecting the shake amount, converts the image blur information into an electric signal, and the signal is sent to the image stabilization control microcomputer 3.
As the image stabilization head amplifier 13, for example, an angular velocity sensor or the like can be used.

The VR switch 14 has a shake correction mode 1
This is a switch for switching the shake correction mode 2. Here, for example, the shake correction mode 1 is a mode for performing rough control when correcting shake of the finder image after the shooting preparation start operation, and the shake correction mode 2 is for correcting shake during actual exposure. This is a mode for precise control. The VR operation switch 14-1 is a switch that determines whether or not to execute the image stabilization drive control, and starts the image stabilization drive control from the timing when the VR operation switch 14-1 is turned on.

The distance encoder 15 is an encoder for detecting a focus position and converting it into an electric signal, and its outputs are similarly output from the image stabilization control microcomputer 3, the ultrasonic motor microcomputer 16 and the communication microcomputer. It is connected to the computer 24. The ultrasonic motor microcomputer 16 is for controlling the ultrasonic motor 19 that drives the focusing optical system driving unit.

The USM encoder 17 is the ultrasonic motor 1
9 is an encoder that detects the amount of movement, and its output is
It is connected to the USM encoder IC 18. The USM encoder IC 18 is a circuit that converts the amount of movement of the ultrasonic motor 19 into an electric signal, and the signal is sent to the ultrasonic motor microcomputer 16.

The ultrasonic motor 19 is a motor for driving the focusing optical system. The ultrasonic motor drive circuit 20 is a circuit for generating two drive signals having a drive frequency specific to the ultrasonic motor 19 and having a 90 ° phase difference with each other. The ultrasonic motor IC 21 is a circuit that interfaces between the ultrasonic motor microcomputer 16 and the ultrasonic motor drive circuit 20.

The zoom encoder 22 is an encoder for detecting the lens focal length position and converting it into an electric signal.
The output is connected to the image stabilization control microcomputer 3, the ultrasonic motor microcomputer 16 and the communication microcomputer 24.

The DC-DC converter 23 is a circuit that supplies a stable DC voltage against fluctuations in battery voltage.
It is controlled by a signal from the communication microcomputer 24.

The communication microcomputer 24 communicates between the lens device 1 and the body device 2, and the lens device 1
It is for transmitting a command to other microcomputers 3 and 16 in the inside.

The release switch 26 is provided in the body device 2. The release switch 26 is a half-depress switch SW1 which starts the photographing preparation operation by half-pressing the release button and the start of exposure control by fully-pressing the release button. It is composed of a full-press switch SW2.

The mode switch 27 is a switch for switching the shake correction control to stop or continue after the exposure control is completed.

FIG. 2 is a flow chart for explaining the operation sequence of the image pickup apparatus according to this embodiment. Step (hereinafter abbreviated as S)
At 200, the communication microcomputer 24 prepares for communication. At the same time, the image stabilization control microcomputer 3 prepares for communication in S201, and the ultrasonic motor microcomputer 16 prepares for communication in S202. In S203, the communication microcomputer 24 communicates with the body device 2 via the lens contact 4. In step S204, the focus control instruction received from the body device 2 is transmitted to the ultrasonic motor microcomputer 16. In step S205, the ultrasonic motor microcomputer 16 performs focusing control based on the information from the zoom encoder 22 and the distance encoder 15.

In step S206, the image stabilization control instruction received from the body device 2 is transmitted to the image stabilization control microcomputer 3. In S207, the image stabilization microcomputer 3 performs image stabilization calculation. In S208,
The image stabilization microcomputer 3 performs image stabilization control.

FIG. 4 shows the image stabilization calculation routine (S20 of FIG. 2).
8 is a flowchart showing an operation procedure of 8). In S400, the body microcomputer 25 detects that the body power supply is turned on. In S401, the body microcomputer 25 performs communication via the communication microcomputer 24 and the lens contact 4.
The lens information is detected from the lens device 1. In S402, the body microcomputer 25 determines in S401
It is determined from the lens information obtained in step S1 whether or not the lens device 1 is an anti-vibration function compatible lens. If the lens device 1 is an anti-vibration function compatible lens, the process advances to step S403. , Jump to S408.

In step S403, the body microcomputer 25 communicates via the lens contact 4 to supply power to the lens device 1. In S404, the body microcomputer 25 performs communication via the communication microcomputer 24 and the lens contact 4 to detect lens information including the logical information of the VR switch 14 and the VR operation switch 14-1 from the lens device 1. .

In S405, the body microcomputer 25 causes the VR switch 14 obtained in S404.
It is determined whether the image stabilization mode 1 or the image stabilization mode 2 is on or off. If the VR switch 14 is on (image stabilization mode 1), the process proceeds to the next step S406, and the VR switch 14
Is OFF (anti-vibration mode 2), the process jumps to S408.

In S406, the body microcomputer 25 determines whether the VR operation switch 14-1 is on or off. If the VR operation switch 14-1 is on, the process proceeds to the next S407, where the VR operation switch 14-1 is turned on. 14-
If 1 is off, the process jumps to S408.

In step S407, the body microcomputer 25 performs communication via the communication microcomputer 24 and the lens contact 4, and sends a control command for image stabilization mode 1 to the image stabilization microcomputer 3.

In S408, the release switch 26
Is determined to be on or off, and if it is on, the following S409 is performed.
If it is off, the process returns to S406.

In S409, the body microcomputer 25 causes the VR switch 14 obtained in S404.
It is determined whether the image stabilization mode 1 or the image stabilization mode 2 is turned on or off, and if the VR switch 14 is on (image stabilization mode 1), the process proceeds to the next S410, and the VR switch 14
Is off (image stabilization mode 2), the process jumps to S411.

In step S410, the body microcomputer 25 performs communication via the communication microcomputer 24 and the lens contact 4, and sends a control command for image stabilization mode 2 to the image stabilization microcomputer 3.

In step S411, the body microcomputer 25 executes film exposure control. S41
In 2, the body microcomputer 25 communicates via the communication microcomputer 24 and the lens contact 4, transmits an image stabilization stop command to the image stabilization microcomputer 3, and returns.

As described above, according to the first embodiment, when it is not necessary to continue the shake correction control after the exposure control is completed, the shake correction control is not continuously performed, and the photographer does not perform the exposure control. After the end of, the VR operation switch 14-1 does not need to be operated again, and unnecessary power consumption does not occur.

FIG. 5 shows a second embodiment of the shake correction apparatus according to the present invention.
6 is a flowchart showing the operation procedure of the image stabilization calculation routine of the embodiment. The second embodiment is similar to the first embodiment shown in FIG.
Since the configuration of FIG. 3 and the operation procedure of FIG. 2 are the same, description will be given using the same reference numerals, and overlapping drawings and the like will be appropriately omitted.

In FIG. 5, S500 to S511 are the same as S400 to S411 in FIG. S
At 512, the body microcomputer 25
Detects whether the mode switch 27 is on or off, and proceeds to S514 if it is on (continuous image stabilization mode), and proceeds to the next S513 if it is off.

In step S513, the body microcomputer 25 performs communication via the communication microcomputer 24 and the lens contact 4, transmits an image stabilization stop command to the image stabilization microcomputer 3, and returns. . In step S <b> 514, the body microcomputer 25 performs communication via the communication microcomputer 24 and the lens contact 4, and sends the image stabilization mode 1 control command to the image stabilization microcomputer 3.

As described above, according to the second embodiment, since the stop mode or the continuation mode can be selected by the mode switch 28, after the exposure control is finished, it is desired to stop the shake correction or to continue the shake correction. In any of the situations, after the exposure control is completed, the VR operation switch 1
There is no need to operate 4-1.

The present invention is not limited to the embodiments described above, and various modifications and changes are possible, and these are also included in the present invention. For example, in this embodiment, an example of a lens device of a single-lens reflex camera in which the lens device and the body device are attachable / detachable has been described, but the present invention can be applied to a lens shutter camera in which the lens cannot be replaced.

[0044]

As described in detail above, according to the first aspect, when the exposure control is completed during the execution of the shake correction control, the shake correction control is stopped. It is not necessary to perform the operation for canceling the shake correction control operation determination unit again, and unnecessary power consumption is eliminated.

According to the second aspect, the mode switching unit can switch between the stop mode in which the shake correction control is stopped at the end of the exposure control and the continuous mode in which the shake correction control is continuously performed at the end of the exposure control. Therefore, if one of the modes is selected in advance, it is not necessary to operate the shake correction control operation determining unit again after the exposure is completed.
There is an effect.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of a shake correction apparatus according to the present invention.

FIG. 2 is a flowchart illustrating an operation sequence of the shake correction apparatus according to the first embodiment.

FIG. 3 is a diagram showing a configuration including a photographing optical system of the shake correction apparatus according to the first example.

FIG. 4 is a flowchart showing an operation procedure of an image stabilization calculation routine (S208) of FIG.

FIG. 5 is a flow chart showing an operation procedure of an image stabilization calculation routine of the second embodiment of the shake correcting apparatus according to the present invention.

[Explanation of symbols]

 1 Lens Device 2 Body Device 3 Anti-Vibration Control Microcomputer 4 Lens Contact 5 X Encoder 6 X Encoder IC 7 X Axis Drive Motor 8 X Axis Motor Driver 9 Y Encoder 10 Y Encoder IC 11 Y Axis Drive Motor 12 Y Motor Driver 13 Anti-vibration head amplifier (angular velocity sensor) 14 VR switch 14-1 VR operation switch 15 Distance encoder 16 Ultrasonic motor microcomputer 17 USM encoder 18 USM encoder IC 19 Ultrasonic motor 20 Ultrasonic motor drive circuit 21 Ultrasonic motor IC 22 Zoom Encoder 23 DC-DC Converter 24 Communication Microcomputer 25 Body Microcomputer 26 Release Switch 27 Mode Switch

Claims (2)

[Claims] 1. A photographing optical system, a shake detecting unit that detects shake of an optical axis of the photographing optical system, and a shake correction driving unit that relatively shifts a part or all of the photographing optical system and a photographing screen. And a shake correction control unit that generates a shake correction control signal for the shake correction drive unit based on the output of the shake detection unit, the exposure control is performed during the shake correction control. A shake correction apparatus characterized by stopping the shake correction control when completed. 2. The shake correction apparatus according to claim 1, wherein a stop mode in which the shake correction control is stopped at the end of exposure control and a continuous mode in which the shake correction control is continuously performed at the end of exposure control can be switched. A shake correction device comprising a simple mode switching unit.