Shake correcting apparatus

In a shake correcting apparatus incorporating a lock function, if shake correcting control is executed immediately after unlocking, an impact is exerted on a shake correcting mechanism, and respondency of the shake correcting apparatus worsens due to the control for avoiding this impact. For preventing this, in a photographing apparatus including a shake correcting device and a lock device, there are provided a first communication unit, provided in the lens device, for transmits data about detected result of a locked-state to a body device, and a second communication unit, provided in the body device, for receiving the data about the detected result of the locked state.

BACKGROUND OF THE INVENTION 
1. Field of the Invention 
The present invention relates to a shake correcting apparatus incorporating 
a shake correcting function. 
2. Related Background Art 
In a photographing apparatus represented by a camera, an AF device (Auto 
Focusing Device) has become popular. In recent years, it has been proposed 
to further provide a VR apparatus (shake correcting apparatus) for 
correcting an image blur that is derived from a camera shake or the like. 
The shake correcting apparatus detects fluctuations in angle of an optical 
axis, which are attributed to the camera shake or the like, and corrects 
the image blur on a photographed picture on the basis of a result of this 
detection. For instance, Japanese Patent Laid-Open Application No. 2-66535 
discloses an example as applied to a single-lens optical system. Japanese 
Patent Laid-Open Application No. 2-183217 discloses an example wherein 
camera shake is corrected by moving a part of a photographing optical 
system of an inner focus type telescopic lens. 
Further, a shake correcting apparatus with a lock mechanism employed for a 
non-operating time is disclosed in each of U.S. Pat. No. 5,117,246 (Camera 
System With Image Blur Preventive Function), U.S. Pat. No. 5,153,633 
(Camera With Image Blur Correcting Function), and Japanese Patent 
Laid-Open Application No. 6-67274 (Camera With Image Blur Correcting 
Function). 
However, the photographing apparatus incorporating both of the conventional 
shake correcting function and lock function has a drawback in which a time 
lag is inevitably caused until an unlocked state actually comes, since the 
body device transmits an unlock command to the lens device according to 
such a method that the body device transmits an unlock control command to 
the lens device. 
Therefore, in such a case that the body device executes the shake 
correcting control immediately after the unlocking, the shake correcting 
control might be started before a completion of the unlocking. There is 
also a possibility in which the shake correcting apparatus is suddenly 
driven enough to make a large acceleration act, resulting in a collision 
with a stopper, etc., and giving an impact. 
Further, for steering clear of such an impact upon the shake correcting 
apparatus, it can be considered that the body device, after a 
predetermined time has elapsed since transmission of an unlock command was 
transmitted to the lens device, transmits a shake correcting control 
command to the lens device. If thus done, however, it follows that the 
respondency when the shake correcting apparatus is activated declines. 
Further, in shake correcting apparatuses including locked-state detecting 
devices, although capable of detecting an actual locked-state, there is 
almost no individual difference between the cameras, and a delayed time up 
to the completion of the unlocking since the unlocking was executed 
becomes fixed. Hence, there is a small control effect in terms of 
executing the shake correcting control after the predetermined time has 
elapsed since the unlock command was transmitted. For this reason, there 
can be done nothing better than actually providing a locked-state 
detection switch in the vicinity of the lock mechanism to enhance the 
respondency of the shake correcting apparatus. This therefore leads to an 
increase in costs. 
In a still camera and a movie camera, an image blur may be caused by a 
camera shake when performing the photography. Developed under such 
circumstances is a shake correcting apparatus for correcting the shake by 
actually measuring a shake (deflection) produced in the camera, which 
involves using an angular speed sensor. 
In this type of shake correcting apparatus, a shake correcting optical 
system (hereinafter referred to as a "correcting optical system") is so 
disposed on the optical axis of the photographing lens as to be tiltable. 
The optical axis of this correcting optical system is inclined in such a 
direction as to offset the shake of the camera, thus correcting an image 
blur on an object picture. 
By the way, in this shake correcting apparatus, if the shake correction is 
not executed, a movement of the correcting optical system is not 
restrained. Therefore, the correcting optical system largely vibrates when 
carrying the camera, resulting in such drawbacks as an emission of sounds 
and further a damage to the correcting optical system. 
Then, a conventional shake correcting apparatus has a known lock mechanism 
for locking the correcting optical system within the photographing lens 
when the photographing lens is removed from the camera (U.S. Pat. No. 
5,117,246). 
A well-known lock mechanism of the correcting optical system is provided 
with an electromagnetic magnet in the vicinity of the correcting optical 
system. This electromagnetic magnet is constructed to lock the correcting 
optical system when a supply of electricity from the camera body is 
stopped. 
Further, with respect to a timing of locking the correcting optical system, 
a known mechanism is that the correcting optical system is unlocked in 
accordance with a switch (e.g., a "half-push switch of the release 
button") for preparing the photography, and, before winding a film, the 
correcting optical system is locked (U.S. Pat. No. 5,153,633). 
Moreover, as an apparatus for improving the reliability on the unlocking 
operation, there is known a shake correcting apparatus for repeating the 
locking or unlocking operation a predetermined number of times while 
changing a drive condition until a desired locked- or unlocked-state is 
reached by providing a state detecting element for detecting a 
locked-state of the correcting optical system (Japanese Patent Laid-Open 
Application No. 6-67274). 
Further, a known shake correcting apparatus emits an alarm when this state 
detecting element determines that a desired locked- or unlocked-state is 
not reached (Japanese Patent Laid-Open Application No. 6-67274). 
Moreover, a known shake correcting apparatus is constructed such that a 
function of the mechanical lock mechanism is substituted by electrically 
controlling the location, which involves shifting the correcting optical 
system to a desired position (centering) and locating it in that position 
(Japanese Patent Laid-Open Application No. 6-67274). 
Generally, the great majority of lock mechanisms of the shake correcting 
apparatuses lock the correcting optical systems with a stoppage of the 
supply of electricity to the electromagnetic magnet. Therefore, if the 
supply of electricity to the lock mechanism is stopped because of trouble 
pertaining to a power supply system, the correcting optical system is 
always locked. 
In this state, if the shake correction or the location control is executed, 
a large burden is applied upon the correcting optical system and a motor, 
and therefore the problems is a damage to the camera. 
In particular, if the correcting optical system is once locked because of 
the trouble pertaining to the power supply system, as stated in Japanese 
Patent Laid-Open Application No. 6-67274, the unlocking can be done even 
by repeating the unlocking operation. 
Further, the ordinary operators have no countermeasure even by alarming 
this state. 
Therefore, as a matter of fact, the shake correction or the location 
control is executed as the above state remains unchanged in the majority 
of cases, and it is difficult to avoid the worst situation of causing the 
damage to the camera. 
Further, the force for restricting the movement of the correcting optical 
system does not work during a period until the shake correction or the 
location control is started since the correcting optical system has been 
unlocked. Therefore, the problem is that if impactive vibrations are 
exerted upon the camera during this period, the correcting optical system 
largely vibrates enough to be damaged. 
For those reasons, it is required that the start timings of the shake 
correction and the location control be accurately controlled. This 
conduces to such a problem that a quantity of data treated by the control 
microcomputer increases, and arithmetic procedures become complicated. 
Especially, a large quantity of signals relative to the photographing 
timing are required to be transferred to and received from the 
photographing lens side. This results in such a problem that the 
respondency of the operation extremely declines. 
According to the construction disclosed in U.S. Pat. No. 5,153,633 given 
above, free vibrations of the correcting optical system are restrained by 
locking the correcting optical system for a duration excluding a period 
extending from the half-push of the release button to the film winding, 
thereby making it feasible to prevent the damage to the movable portion of 
the correcting optical system. 
Normally, in the single-lens reflex camera, a quick return mirror 
(hereinafter simply termed a "mirror") is flipped up and down when 
photographed. The mirror is flipped up and down at a high speed, and 
consequently large vibrations are produced in the camera. 
By the way, the correcting optical system is unlocked during such a period 
that the mirror is flipped up and down in the above-mentioned shake 
correction camera. Therefore, the correcting optical system largely 
oscillates due to the vibrations caused by flipping the mirror up and 
down. 
When the correcting optical system largely oscillates in this manner, there 
arise problems of causing inconveniences such as the emission of sounds 
and, further, damage to the correcting optical system. 
SUMMARY OF THE INVENTION 
It is a primary object of the present invention to provide a shake 
correcting apparatus capable of stably and accurately determining a start 
timing of shake correction or location control with a simple construction. 
It is another object of the present invention to provide a shake correcting 
apparatus capable of accurately preventing damage to a correcting optical 
system due to vibrations when photographed. 
According to the present invention, the problems given above are solved by 
the following steps (1)-(7). 
(1) A lens device transmits a signal showing a locked-state of the shake 
correcting optical system to a body device. 
(2) The signal showing the locked-state of the shake correcting optical 
system to the lens device is transmitted after awaiting a stated signal 
request from the body device to the lens device. 
(3) A start signal of the shake correction is transmitted after sending 
back an unlocked-state. 
(4) A centering signal is transmitted after replying the unlocked-state. 
(5) A lock command execution end signal is transmitted to the body device. 
This eliminates a necessity for a locked-state detection switch. 
(6) The lock command execution end signal has a predetermined timing 
delayed time. 
(7) The timing delayed time is a delayed time needed for executing the 
locking operation. 
According to the present invention, a shake correcting apparatus comprises 
a photographing optical system of a photographing apparatus, a shake 
detecting unit for detecting a deflection of an optical axis in the 
photographing optical system, and a shake correcting optical system, 
disposed in a part of the photographing optical system, for correcting an 
image blur produced due to the deflection. The shake correcting apparatus 
also comprises a shake correction drive unit for relatively moving a part 
or whole of the shake correcting optical system with respect to a 
photographing picture, a shake correcting control unit for generating a 
shake correcting signal of the shake correcting drive unit on the basis of 
an output of the shake detecting unit, and a lock unit for locking the 
shake correcting optical system in a predetermined position. The shake 
correcting apparatus further comprises a locked-state detecting unit, 
provided in a body device or a lens device that constitute the 
photographing apparatus, for detecting whether or not the shake correcting 
optical system is locked in the predetermined position, a first 
communication unit, provided in the lens device, for transmitting an item 
of locked-state detected result data of the locked-state detecting unit to 
the body device from the lens device, and a second communication unit, 
provided in the body device, for receiving the locked-state detected 
result data. 
According to the present invention, the second communication unit 
transmits, to the first communication unit, a locked-state detected result 
data transmission command for commanding the first communication unit to 
transmit the locked-state detected result data singly or together with 
other data to the second communication unit. 
According to the present invention, the second communication unit further 
transmits, to the first communication unit, a shake correcting drive start 
command for commanding the shake correcting drive unit to start the shake 
correcting drive. 
According to the present invention, the second communication unit further 
transmits, to the first communication unit, a start-of-lock command for 
commanding the lock unit to start the locking operation. 
According to the present invention, the second communication unit further 
transmits, to the first communication unit, a start-of-unlock command for 
commanding the lock unit to start the unlocking operation. 
According to the present invention, if there is a request for transmitting 
the shake start command, the second communication unit further holds the 
request for transmitting the shake start command till the request for 
transmitting the shake start command is discarded when the lock unit is in 
the locked state, or till the unlocked-state of the lock unit is detected 
on the basis of the locked-state detected result data. 
According to the present invention, the second communication unit further 
transmits, to the first communication unit, the centering command for 
commanding the shake correcting drive unit to move to an optical central 
position. 
According to the present invention, if there is a request for transmitting 
the centering command, the second communication unit further holds the 
request for transmitting the centering command till the request for 
transmitting the centering command is discarded when the lock unit is in 
the locked state, or till the unlocked-state of the lock unit is detected 
on the basis of the locked-state detected result data. 
According to the present invention, a shake correcting apparatus comprises 
a photographing optical system of a photographing apparatus, a shake 
detecting unit for detecting a deflection of an optical axis in the 
photographing optical system, and a shake correcting optical system, 
disposed in a part of the photographing optical system, for correcting an 
image blur produced due the deflection. The shake correcting apparatus 
also comprises a shake correction drive unit for relatively moving a part 
or whole of the shake correcting optical system with respect to a 
photographing picture, a shake correcting control unit for generating a 
shake correcting signal of the shake correcting drive unit on the basis of 
an output of the shake detecting unit, and a lock unit for locking the 
shake correcting optical system in a predetermined position. The shake 
correcting apparatus further comprises a lock control unit for controlling 
the lock unit, a first communication unit, provided in the lens device 
constituting the photographing apparatus, for transmitting an item of lock 
command execution end data for showing whether or not the lock control 
unit finishes outputting a lock signal or an unlock signal to the lock 
unit from the lens device to the body unit combined with the lens device, 
and a second communication unit, provided in the body device, for 
receiving the lock command execution end data. 
According to the present invention, the second communication unit further 
transmits, to the first communication unit, a lock command execution end 
data transmission command for commanding the first communication unit to 
transmit the lock command execution end data singly or together with other 
data to the second communication unit. 
According to the present invention, the second communication unit further 
transmits, to the first communication unit, a shake correcting drive start 
command for commanding the shake correcting drive unit to start the shake 
correcting drive. 
According to the present invention, the second communication unit further 
transmits, to the first communication unit, a start-of-lock command for 
commanding the lock unit to start the locking operation. 
According to the present invention, the second communication unit further 
transmits, to the first communication unit, a start-of-unlock command for 
commanding the lock unit to start the unlocking operation. 
According to the present invention, if there is a request for transmitting 
the shake start command, the second communication unit further holds the 
request for transmitting the shake start command till the request for 
transmitting the shake start command is discarded when the lock unit is in 
the locked state, or till the unlocked-state of the lock unit is detected 
on the basis of the lock command execution end data. 
According to the present invention, the second communication unit further 
transmits, to the first communication unit, the centering command for 
commanding the shake correcting drive unit to move to an optical central 
position. 
According to the present invention, if there is a request for transmitting 
the centering command, the second communication unit further holds the 
request for transmitting the centering command till the request for 
transmitting a start-of-centering command is discarded when determining 
that the lock unit is in the locked state, or till the lock unit is 
determined to be in the locked-state on the basis of the lock command 
execution end data. 
According to the present invention, further, the lock command execution end 
data showing whether or not an unlock signal is outputted is delayed by a 
predetermined time and then transmitted to the body device from the lens 
device. 
According to the present invention, furthermore, the predetermined time is 
a time necessary for the lock unit to finish the unlocking operation of 
the locking operation since the lock control unit started the lock 
control. 
According to the present invention, a shake correcting apparatus comprises 
a shake detecting unit for detecting a shake quantity of a camera, a shake 
correcting unit for moving an optical system or an imaging surface in the 
camera in such a direction as to offset the shake quantity detected by the 
shake detecting unit, and a lock unit for locking the movement of the 
optical system or the imaging surface that is moved by the shake 
correcting unit. The shake correcting apparatus further comprises a state 
detecting unit for detecting whether or not the optical system or the 
imaging surface is unlocked. The shake correcting unit stops the movement 
drive of the optical system or the imaging surface when the state 
detecting unit determines that the unlocking is incomplete when starting 
the shake correcting operation. 
According to the present invention, further, the shake correcting unit 
awaits till the state detecting unit determines that the unlocking is 
completed and starts moving the optical system or the imaging surface. 
According to the present invention, a shake correcting apparatus comprises 
a shake detecting unit for detecting a shake quantity of a camera, a shake 
correcting unit for moving an optical system or an imaging surface in the 
camera in such a direction as to offset the shake quantity detected by the 
shake detecting unit, a locating unit for location-controlling the optical 
system or the imaging surface in a predetermined position that is moved by 
the shake correcting unit, and a lock unit for locking the movement of the 
optical system or the imaging surface that is moved by the shake 
correcting unit. The shake correcting apparatus further comprises a state 
detecting unit for detecting an unlocked-state of the optical system or 
the imaging surface. The above locating unit stops the location control of 
the optical system or the imaging surface when the state detecting unit 
determines that the unlock is incomplete. 
According to the present invention, further, the locating unit awaits till 
the state detecting unit determines that the unlocking is completed and 
starts the location control of the optical system or the imaging surface. 
According to the present invention, furthermore, the above state detecting 
unit determines that the unlocking is completed after a predetermined time 
has elapsed since the unlocking of the optical system or the imaging 
surface was started. 
According to the present invention, a shake correcting apparatus comprises 
a shake detecting unit for detecting a shake quantity of a camera, a shake 
correcting unit for moving an optical system or an imaging surface in the 
camera in such a direction as to offset the shake quantity detected by the 
shake detecting unit, and a lock unit for locking the movement of the 
optical system or the imaging surface that is moved by the shake 
correcting unit. The shake correcting unit unlocks the optical system or 
the imaging surface that is locked by the lock unit in advance of the 
shake correction control. 
According to the present invention, a shake correcting apparatus comprises 
a shake detecting unit for detecting a shake quantity of a camera, a shake 
correcting unit for moving an optical system or an imaging surface in the 
camera in such a direction as to offset the shake quantity detected by the 
shake detecting unit, a locating unit for location-controlling, in a 
predetermined position, the optical system or the imaging surface that is 
moved by the shake correcting unit, and a lock unit for locking the 
movement of the optical system or the imaging surface that is moved by the 
shake correcting unit. The above locating unit unlocks the optical system 
or the imaging surface that is locked by the lock unit. 
In the shake correcting apparatus of the present invention, if the 
unlocking is incomplete when starting the shake correcting operation, the 
shake correcting unit stops the movement of the optical system or the 
imaging surface. 
In the shake correcting apparatus of the present invention, the shake 
correcting unit awaits till the completion of the unlocking is determined 
and starts moving the optical system or the imaging surface. 
In the shake correcting apparatus of the present invention, when 
determining the unlocking is incomplete at the start of the location 
control operation, the locating unit stops the location control of the 
optical system or the imaging surface. 
In the shake correcting apparatus of the present invention, the locating 
unit awaits till the unlocking is completed and starts the location 
control of the optical system or the imaging surface. 
In the shake correcting apparatus of the present invention, the state 
detecting unit determines that the unlocking is completed after the 
predetermined time has elapsed since the unlocking operation was started 
without directly detecting the unlocked state. 
In the shake correcting apparatus of the present invention, the shake 
correcting unit releases the locking by the lock unit as a preparation for 
starting the shake correction. 
In the shake correcting apparatus of the present invention, the locating 
unit releases the locking by the lock unit as a preparation for starting 
the location control. 
According to the present invention, a shake correcting apparatus comprises 
a shake detecting unit for detecting a shake quantity of a camera, a shake 
correcting unit for moving an optical system or an imaging surface in the 
camera in such a direction as to offset the shake quantity detected by the 
shake detecting unit, and a lock unit for locking the movement of the 
optical system or the imaging surface that is moved by the shake 
correcting unit. In the shake correcting apparatus, the lock unit takes 
photography timing data form the camera and, on the basis of the timing 
data, locks the optical system of the imaging surface till an exposure on 
the imaging surface is started since the photography preparatory operation 
of the camera was started. 
According to the present invention, the lock unit takes the photography 
timing data from the camera and, on the basis of the timing data, locks 
the optical system or the imaging surface till an end of the mirror-up 
since the mirror-up was started in the camera. 
According to the present invention, a shake correcting apparatus comprises 
a shake detecting unit for detecting a shake quantity of a camera, a shake 
correcting unit for moving an optical system or an imaging surface in the 
camera in such a direction as to offset the shake quantity detected by the 
shake detecting unit, and a lock unit for locking the movement of the 
optical system or the imaging surface that is moved by the shake 
correcting unit. The lock unit takes the photography timing data from the 
camera and, on the basis of the timing data, locks the optical system or 
the imaging surface with an end of the exposure on the imaging surface. 
According to the present invention, further, the lock unit takes the 
photography timing data from the camera and, on the basis of the timing 
data, locks the optical system or the imaging surface till the mirror-down 
is ended since the mirror-down is started in the camera. 
In the shake correcting apparatus of the present invention, the movement of 
the optical system or the imaging surface, which is moved by the shake 
correcting unit, is locked during a period from the start of the 
photography preparatory operation of the camera to a timing just before 
starting the exposure on the imaging surface. 
In the shake correcting apparatus of the present invention, during the 
mirror-up period, the movement of the optical system or the imaging 
surface, which is moved by the shake correcting unit, is locked. 
In the shake correcting apparatus of the present invention, with an end of 
the exposure in the camera, the movement of the optical system or the 
imaging surface, which is moved by the shake correcting unit, is locked. 
In the shake correcting apparatus of the present invention, during the 
mirror-down period, the movement of the optical system or the imaging 
surface, which is moved by the shake correcting unit, is locked.

DESCRIPTION OF THE PREFERRED EMBODIMENTS 
Embodiments of the present invention will hereinafter be described in 
greater detail with reference to the accompanying drawings. 
FIG. 1 is a block diagram illustrating a block diagram illustrating a 
signal system of a photographing apparatus to which a shake correcting 
apparatus in a first embodiment of the present invention is applied. FIG. 
3 is a schematic diagram showing a construction including a photographing 
optical system of the photographing apparatus to which the shake 
correcting apparatus in the first embodiment is applied. 
As illustrated in FIGS. 1 and 3, this shake correcting apparatus is 
incorporated into the photographing apparatus (see FIG. 3) constructed of 
a lens device 1 and a body device 2. As will be mentioned later, a part of 
the photographing optical system is moved based on a detected value of a 
deflection quantity of an optical axis in the photographing optical 
system. 
The lens device 1 is provided with a microcomputer 3 for shake correction 
control, a microcomputer 16 for an ultrasonic motor and a microcomputer 24 
for communications. On the other hand, the body device 2 is provided with 
a microcomputer for the body. 
The shake correction control microcomputer 3 controls a drive of a shake 
correction drive consisting of an X-axis drive motor 7, an X-axis motor 
driver 8, a Y-axis drive motor 11 and a Y-axis motor driver 12 on the 
basis of an output of the body microcomputer 25 of the body device 2, and 
optical system positional data given from an X-encoder 5, a Y-encoder 9, a 
distance encoder 15 and a zoom encoder 22. 
Further, the shake correction control microcomputer 3 constitutes a 
locked-state detecting unit of a lock magnet 29 which will be mentioned 
later, and checks whether the lock magnetic 29 is locked or not from an 
electrifying condition of the lock magnet 29. 
Further, the shake correction control microcomputer 3 also serves as a lock 
control unit for controlling the lock magnet 29. 
Note that if the body device 2 is provided with the shake correction 
control microcomputer 3 serving as the locked-state detecting unit, an 
item of locked-state detected result data may be temporarily transmitted 
to the communication microcomputer 24 defined as a first communication 
unit provided in the lens device 1 and then transmitted to the shake 
correction control microcomputer 3 from the communication microcomputer 
24. 
A lens terminal 4 is an electric contact group used for transferring and 
receiving signals between the lens device 1 and the body device 2, and is 
connected to the communication microcomputer 24. 
The X-encoder 5 detects a quantity of an X-axis directional movement of the 
optical system, and an output of the X-encoder 5 is connected to an 
X-encoder IC 6. The X-encoder IC 6 serves to convert the X-axis 
directional movement quantity of the optical system into an electric 
signal, and this signal is transmitted to the shake correction control 
microcomputer 3. Further, the X-axis drive motor 7 is a drive motor for 
driving and moving an X-axis deflection correcting optical system. The 
X-axis motor driver 8 is a circuit for driving the X-axis drive motor 7. 
Similarly, the Y-encoder 9 serves to detect a Y-axis directional movement 
quantity of the optical system, and an output of the Y-encoder 9 is 
connected to a Y-encoder IC 10. The Y-encoder IC 10 serves to convert the 
Y-axis directional movement quantity of the optical system into an 
electric signal, and this signal is transmitted to the shake correction 
control microcomputer 3. Further, the Y-axis drive motor 11 is a drive 
motor for driving and moving a Y-axis deflection correcting optical 
system. The Y-axis motor driver 12 is a circuit for driving the Y-axis 
drive motor 11. 
A shake correction head amplifier 13 is a shake detecting unit for 
detecting a shake quantity and also a circuit for detecting the shake 
quantity. More specifically, an item of image blur data is converted into 
an electric signal, and this signal is transmitted to the shake correction 
control microcomputer 3. For example, an angular speed sensor or the like 
is usable as the shake correction head amplifier 13. 
A VR switch 14 is a switch for switching over ON/OFF states of the shake 
correction drive. 
The distance encoder 15 is an encoder for detecting a focus position and 
converting it into an electric signal, and an output of which is similarly 
connected to the shake correction control microcomputer 3, the ultrasonic 
motor microcomputer 16 and the communication microcomputer 24. 
The ultrasonic motor microcomputer 16 serves to control the ultrasonic 
motor 19 for driving a focusing optical system moving unit. 
A USM encoder 17 is an encoder for detecting a movement quantity of the 
ultrasonic motor 19, and an output of which is connected to a USM encoder 
IC 18. The USM encoder IC 18 is a circuit for converting the movement 
quantity of the ultrasonic motor 19 into an electric signal, and this 
signal is transmitted to the ultrasonic motor microcomputer 16. 
The ultrasonic motor 19 is a motor for moving the focusing optical system. 
An ultrasonic motor drive circuit 20 is a circuit, having a drive 
frequency intrinsic to the ultrasonic motor 19, for generating two drive 
signals having a 90.degree. phase difference from each other. An 
ultrasonic motor IC 21 is a circuit serving as an interface between the 
ultrasonic motor microcomputer 16 and the ultrasonic motor drive circuit 
20. 
The zoom encoder 22 is an encoder for detecting a lens focal length 
position and converting it into an electric signal, and an output of which 
is connected to the shake correction control microcomputer 3, the 
ultrasonic motor microcomputer 16 and the communication microcomputer 24. 
A DC-DC converter 23 is a circuit for supplying a DC voltage which is 
stable against voltage fluctuations of a power supply battery, and is 
controlled by the signal from the communication microcomputer 24. 
The communication microcomputer 24 is a microcomputer for performing 
communications between the lens device 1 and the body device 2 and 
transferring commands to other microcomputers (such as the shake 
correction control microcomputer 3, the ultrasonic motor microcomputer 16, 
etc.) within the lens device 1. Further, in accordance with the first 
embodiment, the communication microcomputer 24 serves as a first 
communication unit for transmitting, to the body device 2, the 
locked-state detected result data outputted from the shake correction 
control microcomputer 3 serving as the locked-state detecting unit. 
The first communication unit transmits, to the body device 2, an item of 
lock command execution end data showing whether or not the shake 
correction control microcomputer 3 defined as a lock control unit outputs 
a lock signal or unlock signal to the lock magnet 29. 
The body microcomputer 25 indicates a shake correction display unit 27 to 
display an alarm by using maximum shake correction time data, exposure 
setting data and subject luminance data that are transferred from the lens 
device 1. 
Further, in accordance with the first embodiment, the body microcomputer 25 
serves as a second communication unit for receiving the lock-state 
detected result data outputted from the communication microcomputer 24. 
Further, the second communication unit also receives the lock command 
execution end data. 
A release switch 28 is provided in the body device 2. A photographer 
transfers a start of exposure control to the body device 2, and, if 
designated by a shake correction control start switch determining process, 
a transmission timing of a shake correction control signal is determined. 
The release switch 28 is constructed of a half-push switch SW1 for 
starting a photography preparatory operation by half-pushing a release 
button with a finger of the photographer, and a full-push switch SW2 for 
indicating a start of the exposure control by fully pushing the release 
button. 
The lock magnet 29 serves as a locking element for locking the shake 
correcting optical system in a predetermined position (central position). 
The lock magnet 29 is an electromagnetic magnet provided in the lens 
device 1 and interlocking with mechanism parts (unillustrated) provided 
for fixing a shake correcting mechanism. When electrifying the 
electromagnetic magnet, the shake correcting mechanism is in a movable 
state, and during non-electrification of the electromagnetic magnet, the 
shake correcting mechanism is in a locked-state. In other words, the lock 
magnet 29 is a lock mechanism incorporating an electrification type 
unlocking function to unlock the shake correcting mechanism from the 
predetermined stop position (central position) when electrified. 
The photographing apparatus to which the shake correcting apparatus in the 
first embodiment is applied, is constructed as discussed in detail. 
FIG. 2 is a flowchart of assistance in explaining an operation sequence of 
the photographing apparatus in the first embodiment. 
In step (hereinafter abbreviated to "S") 200, the communication 
microcomputer 24 makes the preparation for the communications. At the same 
time, the shake correction control microcomputer 3 makes the preparation 
for the communications in S201, and the ultrasonic motor microcomputer 16 
makes the preparation for the communication in S202. 
In S203, the communication microcomputer 24 communicates with the body 
device 2 via the lens terminal 4. 
In S204, a focusing control indication given from the body device is 
transferred to the ultrasonic motor microcomputer 16. 
In S205, the ultrasonic motor microcomputer 16 executes the focusing 
control on the basis of the data from the zoom encoder 22, the distance 
encoder 15, etc. 
In S206, a shake correcting control indication or a lock related control 
indication (a lock control indication or an unlock control indication) is 
transferred to the shake correcting control microcomputer 3. 
In S207, the shake correcting control microcomputer 3 performs shake 
correction arithmetic. 
In S208, the shake correcting control microcomputer 3 executes the shake 
correcting control indication or the lock related control indication (the 
lock control indication or the unlock control indication). 
FIGS. 4 and 5 are both flowcharts showing the operating sequence down to a 
process of transmitting to the lens device 2 the shake correcting control 
instruction after finishing the film exposure control with respect to the 
lock related control and the shake correcting control of the body device 2 
in the first embodiment. 
In S400 in FIG. 4, the body device 2 activates the power supply circuit 
within the body device 2 by turning ON a body power supply switch and 
proceeds to S401. 
In S401, the body device 2 communicates with the lens device 1 via the lens 
terminal 4, detects an item of lens data and proceeds to S402. 
In S402, the body device 2 determines whether or not the lens device 1 
attached to the body device 2 is a shake correcting function corresponding 
lens on the basis of the lens data obtained in S401. If determined to be 
the shake correcting function corresponding lens, the body device 2 
proceeds to S403. Whereas if not, the body device proceeds to S411. 
In S403, the body device 2 supplies the lens device 1 with the electric 
power and proceeds to S404. 
In S404, the body device 2 determines whether a shake correcting control 
mode (VR switch) is set ON or not. If the VR switch is turned ON (in the 
case of a shake correcting control execution mode), the process proceeds 
to S405. Whereas if the VR switch is not turned ON (in the case of a shake 
correcting control non-execution mode), the processing proceeds to S411. 
Herein, Table 1 shows an itemized content of the control operations in the 
shake correcting control mode (VR switch). 
TABLE 1 
______________________________________ 
VR Switch ON OFF 
______________________________________ 
Control Shake Correcting Control 
Shake 
Operation Execution (Shake Correcting 
Correct- 
Control During Film Exposure, 
ting 
Which Is Done By VR Operation 
Control 
Switch Excluding Duration Of Film 
Non- 
Exposure) Execution 
______________________________________ 
S405 its determined whether the VR operation switch is turned ON or not. If 
the VR operation switch is turned ON, the processing proceeds to S406. 
Whereas if not turned ON, the processing proceeds to S411. 
Herein, Table 2 shows an itemized content of the control operation by the 
VR operation switch. 
TABLE 2 
______________________________________ 
VR Operation 
Switch ON OFF 
______________________________________ 
Control Operation 
Shake Correcting 
Shake Correcting 
Control Execution 
Control Non- 
Execution 
______________________________________ 
In S406, the body device 2 determines whether or not the lock magnet 29 
defined as the lock unit of the shake correcting optical system that is 
built in the lens device 2 is an unlocked state on the basis of the lens 
data obtained in S401. If the lock magnet 29 is in the unlocked state, the 
processing proceeds to S407. Whereas if not in the unlock state, the 
processing proceeds to S408. 
In S407, the body device 2 transmits the shake correcting control command 
to the lens device 1. 
In S408, the body device 2 checks whether or not the body device 2 has 
already transmitted an unlock command to the lens device 1. If the unlock 
command has already been transmitted, the processing proceeds to S410. 
Whereas if not, the processing proceeds to S409. 
In S409, the body device 2 transmits the unlock command to the lens device 
1. 
In S410, the body device 2 transmits a locked state data transmitting 
instruction to the body device 2. 
In S411, the body device 2 determines whether or not there is turned ON the 
release switch through which the photographer gives a start-of-exposure 
command. If the release switch is turned ON, the processing proceeds to A 
(S500). Whereas if not turned ON, the step S411 is repeatedly executed. 
In S500 in FIG. 5, the body device 2 determines whether or not the lens 
device 2 attached to the body device 2 is the shake correcting function 
corresponding lens on the basis of the lens data obtained in S401. If the 
lens device 2 is determined to be the shake correcting function 
corresponding lens, the processing proceeds to S501. Whereas if not, the 
processing proceeds to S507. 
In S501, the body device 2 checks whether or not the shake correcting 
control mode (VR switch) is set ON. If the VR switch is turned ON (the 
shake correcting control execution mode), the processing proceeds to S502. 
Whereas if the VR switch is not turned ON (the shake correcting control 
non-execution mode), the processing proceeds to S507. 
In S502, the body device 2 determines whether or not the lock magnet 29 of 
the lens device 2 is in the locked state on the basis of the lens data 
obtained in S401. If in the unlocked state, the processing proceeds to 
S503. Whereas if not in the unlocked state, the processing proceeds to 
step S504. 
In S503, the body device 2 transmits the shake correcting control command 
to the lens device 1. 
In S504, the body device 2 checks whether or not the unlock command has 
already been transmitted to the lens device 1. If the same command has 
already been transmitted, the processing proceeds to S506. Whereas if not, 
the processing proceeds to S505. 
In S505, the body device 2 transmits the unlock command back to the lens 
device 1. 
In S506, the body device 2 transmits a locked state data retransmitting 
command to the lens device 1. 
In S507, the body device 2 controls the film exposure. 
In S508, whether or not the VR switch is turned ON is checked. If the VR 
switch is turned ON, the processing proceeds to S509. Whereas if not 
turned ON, the processing returns. 
In S509, the body device 2 checks whether or not the VR operation switch is 
turned ON. If the VR operation switch is turned ON, the processing 
proceeds to S510. Whereas if not turned ON, the processing returns. 
Thus, according to the photographing apparatus to which the shake 
correcting apparatus in the first embodiment is applied, there must be a 
time lag until the unlocked state is completed since the body device 2 has 
transmitted the unlock command to the lens device 1. Even when a length of 
this time lag fluctuates depending on operation conditions of the 
microcomputer of the lens device 1, the body device 2 receives the 
locked-state data from the lens device 1 and judges the locked state, 
thereby making it possible to move the shake correcting optical system. 
Therefore, the body device 2, even in such a case that the shake 
correcting control is carried out immediately after the unlocking 
operation, a possibility of executing the shake correcting control before 
the unlocking operation is eliminated, with the result that no impact as 
given upon the shake correcting mechanism. 
Further, in accordance with the first embodiment, the body device 2 
receives the locked-state data from the lens device 1 and judges this 
locked state, thereby avoiding the impact subsequent to an abrupt 
activation. Hence, the body device 2 transmits the shake correcting 
control command to the lens device 1 after a required or longer time has 
elapsed since the body device 2 transmitted the unlock command to the lens 
device 1, which method eliminates the possibility of worsening the 
respondency. 
Furthermore, in accordance with the first embodiment, the lens device 1 
does not transmit the locked-state data to the body device 2 until the 
body device 2 commands the lens device 1 to transmit the locked-state 
data. Hence, the unnecessary locked-state data is never transmitted to the 
body device 2 from the lens device 1 when the lens which is capable of 
shake correcting control is attached to the body device and incapable of 
the shake correcting control. It is therefore feasible to obviate such a 
drawback that the microcomputer of the body device 2 engages in a 
time-consuming process for communications with the result that other 
required processes are to be delayed. 
Moreover, the first embodiment adopts such a method that the locked-state 
data, when unlocked, is updated after the time needed for the unlocking 
has elapsed since the lock control unit carried out the unlock control. It 
is therefore feasible to prevent damage to the shake correcting mechanism 
due to the execution of the shake correcting control before the unlocking 
process that occurs when the delay of control time is not taken into 
consideration. Further, the locked-state detection switch is not required, 
resulting in a reduction in costs. 
The shake correcting apparatus according to the present invention is not 
limited to the embodiment discussed above, and a variety of modifications 
and changes can be carried out and included in the scope of the present 
invention. For instance, in accordance with the first embodiment, the 
explanation has been given by exemplifying the lens device of the 
single-lens reflex camera in which the lens device and the body device are 
detachably attached thereto. The present invention can be, however, 
applied to the lens device of the compact camera in absolutely the same 
way. 
A second embodiment of the present invention will be discussed with 
reference to the accompanying drawings. 
FIG. 6 is a block diagram illustrating a construction of the second 
embodiment. 
FIG. 7 is a schematic sectional diagram showing the second embodiment. 
Throughout FIGS. 6 and 7, a camera body 101 is provided with a release 
button 111, and an output of the release button 111 is connected to a 
microcomputer 112 for the body (which is hereinafter termed a "body 
microcomputer"). 
An output terminal of the body microcomputer 112 is connected to a mirror 
driver 113 for flipping a mirror 113a up and down. A communication 
terminal of the body microcomputer 112 is connected via a lens terminal 
114 to a communication microcomputer 121 on the side of a photographing 
lens 102. 
I/O terminals of the communication microcomputer 121 are individually 
connected to a shake correcting control microcomputer 122 and an 
ultrasonic motor microcomputer 123. 
A distance encoder 124 is an encoder for detecting a focus position of the 
photographing lens 102 and converting it into an electric signal, and an 
output of which is connected to the shake correcting control microcomputer 
122, the ultrasonic motor microcomputer 123, and the communication 
microcomputer 121. 
A zoom encoder 125 is an encoder for detecting a focal length of the 
photographing lens 102 and converting it into an electric signal, and an 
output of which is connected to the shake correcting control microcomputer 
122, the ultrasonic motor microcomputer 123, and the communication 
microcomputer 121. 
A shake correcting switch 126 is a switch for setting whether or not a 
shake should be corrected during the film exposure, and an output of which 
is connected to the shake correcting control microcomputer 122. 
A vibration sensor 127 is a sensor circuit for detecting a shake quantity 
of the camera, and an output of which is connected to the shake correcting 
control microcomputer 122. Note that the vibration sensor 127 may involve 
the use of, e.g., an angular sensor. 
A shake correcting operation switch 128 is a switch for setting whether or 
not the shake should be corrected during a period exclusive of the film 
exposing period, and output of which is connected to the shake correcting 
control microcomputer 122. 
A correcting optical system 129a is an optical element so disposed on the 
optical axis of the photographing lens 102 as to be tiltable. 
A lock magnet 129 is an electromagnetic magnet provided for locking a 
motion of the correcting optical system 129a, and an input of which is 
connected to the shake correcting control microcomputer 122. Note that the 
correcting optical system 129a is in a movable state during 
electrification of the lock magnet 129 and is in a fixed state during 
non-electrification thereof. 
Connected further to the shake correcting control microcomputer 122 are an 
X-motor 131 and an X-motor driver 130 for moving the correcting optical 
system 129a in the X-axis direction. A drive quantity of this X-motor 131 
is detected by an X-encoder 132 and is then inputted to the shake 
correcting control microcomputer 122. 
Connected similarly to the shake correcting control microcomputer 122 are a 
Y-motor 134 and a Y-motor driver 133 for moving the correcting optical 
system 129a in the Y-axis direction. A drive quantity of this Y-motor 134 
is detected by a Y-encoder 135 and is then inputted to the shake 
correcting control microcomputer 122. 
Connected also to the ultrasonic motor microcomputer 123 are an ultrasonic 
motor 137 and an ultrasonic motor IC 136 for adjusting a focus of the 
photographing lens 102. A drive quantity of this ultrasonic motor 137 is 
detected by an encoder 138 and is then inputted to the ultrasonic motor 
microcomputer 123. 
FIG. 8 is a flowchart showing the operation of a third embodiment. 
The operation of the third embodiment will hereinafter be described with 
reference to FIGS. 6 through 8. 
When the photographing lens 102 is supplied with the electric power, the 
communication microcomputer 121 starts preparing the communication (S200). 
With this preparation for the communication, the shake correcting control 
microcomputer 122 and the ultrasonic motor microcomputer 123 also start 
preparing the communications (S201, S202). 
Upon a completion of these preparations for the communications, the 
communication microcomputer 121 starts communicating with a camera body 
101 via a lens terminal 114 (S203). 
Herein, upon receiving the focusing control indication from the camera body 
101 (S204), the focusing control indication is transferred to the 
ultrasonic motor microcomputer 123. The ultrasonic motor microcomputer 123 
performs the focusing control on the basis of the data of the zoom encoder 
125 and of the distance encoder 124. 
On the other hand, when fully pushing the release button 111 on the side of 
the camera body 101, the camera body 101 gives a release full-push 
indication to the communication microcomputer 121 (S206). 
On receiving this release full-push indication, the shake correcting 
control microcomputer 122, when the shake correcting switch 126 is turned 
ON, there is set a flag of the shake correcting control indication for 
indicating that the shake correcting control is on the execution. 
Based on this shake correcting control indication, the shake correcting 
control microcomputer 122 starts electrifying the lock magnet 129 (S208). 
Subsequently, the shake correcting control microcomputer 122 at first 
slightly drives the X-motor 131. Thereafter, a movement quantity of the 
correcting optical system 129a is detected through the X-encoder 132. 
Herein, if the correcting optical system 129a is moved by the drive of the 
X-motor 131, the correcting optical system 129a is determined to be in the 
unlocked state. 
On the other hand, if the correcting optical system 129a is not moved, the 
correcting optical system 129a is determined to be in the locked state. 
Herein, if determined to be in the locked state (S307), the execution of 
the shake correction is temporarily halted while holding the above shake 
correcting control indication. In this state, the processing returns to 
S203, wherein the focusing control is gain executed, and the detection of 
the locked state in S307 is repeated based on the held shake correcting 
control indication. 
On the other hand, if determined to be in the unlocked state (S307), the 
shake correcting control microcomputer 122 drives the X-motor 131 and the 
Y-motor 134 on the basis of an output of the vibration sensor 127, and 
then executes the correction of the shake (S308, S309). After executing 
the film exposure in the thus shake-corrected state, the processing 
returns to S203 to get ready for a next photography. 
Thus, in accordance with the third embodiment, if the unlocking operation 
of the correcting optical system 129a is uncompleted, neither the X-motor 
131 nor the Y-motor 134 is driven. Hence, it is feasible to surely avoid 
such a situation that the shake correction is executed while the 
correcting optical system 129a remains locked. 
In particular, the correcting optical system 129a is always in the locked 
state due to a trouble pertaining to a power supply system, in which case 
the shake correction does not start till this trouble is obviated. 
Therefore, it is possible to safely certainly avoid the worst condition in 
which the camera is damaged. 
Further, the shake correction can immediately start after the correcting 
optical system 129a is unlocked. It is therefore feasible to reduce the 
time till the shake correction is started since the correcting optical 
system 129a was unlocked with a simple construction. Thus, a period for 
which a force for restricting the movement of the correcting optical 
system 129a does not work, is reduced, whereby impactive vibrations are 
exerted on the camera during this period. It is therefore feasible to 
remarkably reduce the possibility in which the correcting optical system 
129a might be damaged. 
Next, a fourth embodiment will be discussed. 
FIG. 9 is a flowchart showing the operation of the fourth embodiment. 
Note that the constructive elements in the fourth embodiment are the same 
as those in the embodiment discussed above and therefore marked with the 
identical reference numerals, with the explanation being omitted herein. 
The operation of the fourth embodiment will be described with reference to 
FIGS. 6, 7 and 9. 
When the photographing lens 102 is supplied with the electric power, the 
communication microcomputer 121 starts preparing the communication (S200). 
With this preparation for the communication, the shake correcting control 
microcomputer 122 and the ultrasonic motor microcomputer 123 also start 
preparing the communications (S201, S202). 
Upon a completion of these preparations for the communications, the 
communication microcomputer 121 starts communicating with the camera body 
101 via the lens terminal 114 (S203). 
Herein, upon receiving the focusing control indication from the camera body 
101 (S204), the focusing control indication is transferred to the 
ultrasonic motor microcomputer 123. The ultrasonic motor microcomputer 123 
performs the focusing control on the basis of the data of the zoom encoder 
125 and of the distance encoder 124. 
Further, upon receiving the shake correcting control indication from the 
camera body 101 (S206), the shake correcting control microcomputer 122 
starts electrifying the lock magnet 129 (S208). After awaiting till a 
predetermined delay time elapses since the above electrification was 
started, the shake correcting control microcomputer 122 judges that the 
unlocking is completed and therefore executes the shake correction (S210, 
S211). After performing the film exposure in this state, the processing 
returns to S203 to get ready for the next photography. 
Thus, in the embodiment discussed above, the determination of the 
completion of unlocking is made after the predetermined time has elapsed 
since the unlocking operation started. Hence, there is no necessity for 
directly detecting the state of the lock magnet 129. Accordingly, a sensor 
for detecting the locked state is not required to be disposed, and the 
unlocking can be extremely easily determined. 
Further, in accordance with the shake correcting control indication from 
the camera body 101, the photographing lens 102 unlocks the correcting 
optical system 129a as a preparation for starting the shake correction, 
and hence it is possible to omit a complicated process for individually 
synchronizing an operation timing of starting the shake correction and the 
unlocking. 
Further, there is no necessity for judging the locked-state or transferring 
the locked-state to the camera body 101. Hence, the time needed therefor 
is saved, whereby the respondency to the shake correction can be enhanced. 
Note that the embodiment discussed above has dealt with the case of 
executing the shake correcting control, but the present invention is not 
confined to the above-mentioned. As in the case of the shake correction, a 
start timing of the locating control may be determined. 
Moreover, the embodiment discussed above has dealt with the case where the 
shake is corrected by moving the correcting optical system, but the 
present invention is not limited to the above-mentioned. In the shake 
correcting apparatus for correcting the shake by moving, e.g., exposure 
surfaces of a photosensitive element and an imaging element, the start 
timing of the locating control or the shake correction may be determined 
as in the same way with the above-described embodiment by detecting the 
locked states of these exposure surfaces. 
As discussed above, according to the present invention, if the unlocking is 
not incomplete in the correcting optical system and other movable 
portions, it is possible to surely avoid such a situation that the shake 
correction is to be executed while being in the locked state by starting 
no movement of the movable portion. 
Particularly, if the movable portion is in the ever-locked state due to the 
trouble in the power supply system, the shake correction is not executed 
till this trouble is obviated. Therefore, it is feasible to stably 
certainly avoid the worst condition in which the camera might be damaged. 
According to the present invention, the shake correction is started after 
awaiting the unlocking of the movable portion. It is therefore feasible to 
easily reduce the time up to the start of the shake correction since the 
movable portion has been unlocked. Thus, there is shortened the period for 
which the force for restricting the movement of the movable portion does 
not work, thereby making it feasible to remarkably decrease such a 
possibility that the movable portion might be damaged as a result of the 
impactive vibrations being exerted upon the camera during that period. 
According to the present invention, if the unlocking of the movable portion 
is incomplete, the locating control of the movable portion is not started, 
and hence it is possible to surely steer clear of such a situation that 
the locating control is executed while being in the locked state without 
starting the locating control of the movable portion. 
Particularly, if the movable portion is in the ever-locked state due to the 
trouble in the power supply system, the locating control is not executed 
till this trouble is obviated. Therefore, it is feasible to stably 
certainly avoid the worst condition in which the camera might be damaged. 
According to the present invention, the locating control is started after 
awaiting the unlocking of the movable portion. It is therefore feasible to 
easily reduce the time up to the start of the locating control since the 
movable portion has been unlocked. Thus, there is shortened the period for 
which the force for restricting the movement of the movable portion does 
not work, thereby making it feasible to remarkably decrease such a 
possibility that the movable portion might be damaged as a result of the 
impactive vibrations being exerted upon the camera during that period. 
According to the present invention, after the predetermined time has 
elapsed since the unlocking operation was started, the completion of the 
unlocking is determined. Hence, there is no necessity for directly 
detecting the state of the locking element. Accordingly, the sensor for 
detecting the locked state is not required to be disposed, and the 
unlocking can be extremely easily determined. 
According to the present invention, the shake correcting element releases 
the locking by the locking element as a preparation for starting the shake 
correction, and, therefore, it is feasible to omit the complicated process 
for individually synchronizing the operation timing of starting the shake 
correction and the unlocking. 
Further, there is also no necessity for determining the locked state or 
transferring the locked-state data. Hence, the time needed therefor can be 
saved, and the respondency to the shake correction can be enhanced. 
According to the present invention, the locating element releases the 
locking by the locking element as a preparation for starting the locating 
control, and it is therefore possible to omit the complicated process for 
individually synchronizing the operation timing of starting the locating 
control and the unlocking. 
Moreover, there is also no necessity for determining the locked state or 
transferring the locked-state data. Hence, the time needed therefor can be 
saved, and the respondency to the locating control can be enhanced. 
As discussed above, in the shake correcting apparatus to which the present 
invention is applied, the start timing of the locating control or the 
shake correction can be safely certainly determined with the simple 
construction. 
Further, in the corresponding relationship between the embodiment discussed 
referring to FIGS. 6 and 7 and the invention of the present application, 
the movement detecting element corresponds to the vibration sensor 127; 
the shake correcting element corresponds to the shake correcting control 
microcomputer 122, the X-motor driver 130, the X-motor 131, the X-encoder 
132, the Y-motor driver 133, the Y-motor 134 and the Y-encoder 135; and 
the locking element corresponds to the body microcomputer 112, the shake 
correcting control microcomputer 122 and the lock magnet 129. 
FIGS. 10 and 11 are flowcharts showing the operation of a fifth embodiment. 
FIG. 12 is a diagram showing the operation on the side of the lens device 
in the fifth embodiment. 
The fifth embodiment will hereinafter be described with reference to FIGS. 
10 through 12. 
When the release button 111 is half-pushed (step S1), the body 
microcomputer 112 takes in the lens data (step S2) and checks whether or 
not the lens incorporates the shake correcting function from this item of 
lens data (step S3). 
In the case of the photographing lens 102 having no shake correcting 
function, the processing shifts to the normal photographing operation 
(step S4). In the case of the photographing lens 102 having the shake 
correcting function, the photographing lens 102 is supplied with the 
electric power (step S5). 
In this state, the shake correcting control microcomputer 122 checks 
whether or not the shake correcting switch 126 provided in the 
photographing lens 102 is in the ON-status, and transfers a result of 
checking to the body microcomputer 112 via the lens terminal 114 (step 
S6). 
When the shake correcting switch 126 is in the OFF-status, there is no need 
for correcting the shake during the film exposure, and, therefore, the 
processing shifts to the normal photographing operation (step S7). 
When the shake correcting switch 126 is in the ON-status, the shake 
correcting control microcomputer 22 determines whether or not the shake 
correcting operation switch 128 provided in the photographing lens is in 
the ON-status, and transfers a result of determination to the body 
microcomputer 112 (step S7). 
When the shake correcting operation switch 128 is in the OFF-status, the 
shake correction is not executed during a period excluding the film 
exposure period. Then, the shake correcting control microcomputer 122 
continues to cut off the electrification of the lock magnet 129, thus 
making the correcting optical system 129a remain locked (step S8). 
On the other hand, when the shake correcting operation switch 128 is in the 
ON-status, the shake correcting control microcomputer 122 unlocks the 
correcting optical system 129a (step S9) and executes the shake correction 
(step S10). 
Next, the body microcomputer 112 awaits till the release button 111 is 
fully pushed (step S11). 
When the release button 111 is fully pushed, the body microcomputer 112 
gives the lock command to the photographing lens 102. The shake correcting 
control microcomputer 122 cuts off the electrification of the lock magnet 
129 at such a timing as to receive this lock command, thus forcibly 
locking the correcting optical system 129a (step S12). 
Thus, in the locked-state of the correcting optical system 129a, the body 
microcomputer 112 starts flipping up the mirror through the mirror drive 
unit 113 (step S13). 
The body microcomputer 112, after completing the mirror-up (step S14), 
issues the unlock command to the photographing lens 102. The shake 
correcting control microcomputer 122 electrifies the lock magnet 129 at a 
timing when receiving the unlock command, thus unlocking the correcting 
optical system 129a (step S15). 
Subsequently, the shake correcting control microcomputer 122 drives the X- 
and Y-motors 131, 134, thereby moving the unlocked correcting optical 
system 129a. The shake correction is thus executed (step S16). 
In such a state, the body microcomputer 112 executes the film exposing 
operation (step S17). 
Upon finishing the film exposing operation, the body microcomputer 112 
imparts a stop command of the shake correction to the photographing lens 
102. The shake correcting control microcomputer 122 stops the shake 
correction at a time when receiving this stop command (step S18). 
Subsequently, the shake correction control microcomputer 122 locks the 
correcting optical system 129a (step S19). 
Thus, in the locked state of the correcting optical system 129a, the body 
microcomputer 112 starts flipping down the mirror through the mirror drive 
unit 113 (step S20). 
Normally, in the locked state of the correcting optical system 129a, there 
is a wait till the next photography comes. When the shake correcting 
operation switch 128 is turned ON, however, the correcting optical system 
129a is unlocked after a completion of the mirror-down, thereby making the 
shake correction resume (steps S22-S24). 
With the operation given above, for the duration of the mirror-up and -down 
of the mirror 113a, the correcting optical system 129a is forcibly locked. 
Accordingly, the correcting optical system 129a can be surely prevented 
from being damaged without any vibrations of the correcting optical system 
129a due to impactive vibrations subsequent to the mirror-up and -down of 
the mirror 113a. 
Further, the shake correction can be started during the film exposure in a 
state where free vibrations of the correcting optical system 129a are 
restrained by locking the correcting optical system 129a when flipping up 
the mirror. Hence, a setting time for the shake correcting control is 
effectively reduced, whereby a picture with a less image blur can be 
obtained by the photographing. 
Note that the body microcomputer 112 outputs the lock and unlock commands 
and thereby controls the locked-state of the correcting optical system 
129a in the embodiment discussed above, but the present invention is not 
limited to the above-mentioned. For instance, in the photographing lens 
102, the terminal data of the release button 111 and other data are 
fetched out of the camera body 101, and the "mirror-up and -down timings" 
are judged or presumed based on those items of data. The lock control of 
the correcting optical system 129a may be thus performed. 
Further, in accordance with the embodiment discussed above, the lock and 
unlock commands are given, and these commands are executed irrespective of 
the locked-state of the correcting optical system 129a. The present 
invention is not, however, confined to the above-mentioned. For example, 
there is provided a lock monitoring element for detecting the locked-state 
and determining a present locked-state from hysteresis of the 
locked-state, whereby a command that is invalid enough not to change the 
locked-state is not issued, or this invalid command is not executed. 
Further, the embodiment discussed above has dealt with the case where the 
shake correction is attained by moving the correcting optical system. The 
present invention is not, however, confined to the above-mentioned. For 
instance, in the shake correcting apparatus for correcting the shake by 
moving the exposure surfaces of the imaging element and the photosensitive 
member, these exposure surfaces may be locked during the mirror-up and 
-down period. 
As discussed above, according to the present invention, the shake 
correction movable portion is locked during the period up to the time 
before starting the exposure of the imaging surface since the 
photographing preparatory operation of the camera was started. It is 
therefore possible to surely prevent the movable portion from being 
damaged without any vibrations of the movable portion due to the shake 
caused in the camera during such a period. 
Further, the shake correction can be started during the exposure in the 
state where the free vibrations of the movable portion are restrained, and 
hence the setting time for the shake correcting control can be remarkably 
reduced. 
According to the present invention, the shake correction movable portion is 
locked during the mirror-up period in the camera, and hence it is feasible 
to certainly prevent the damage to the movable portion without any 
vibrations of the movable portion due to the vibrations caused by the 
mirror-up. 
Moreover, the shake correction can be started after flipping up the mirror 
in the state where the free vibrations of the movable portion due to the 
mirror-up are restrained, and hence the setting time for the shake 
correcting control can be outstandingly decreased. 
According to the present invention, since the shake correction movable 
portion is locked after finishing the exposure in the camera, the movable 
portion never vibrates due to the camera shake caused for preparing for 
the next photography, and the damage to the movable portion can be surely 
prevented. 
According to the present invention, the shake correction movable portion is 
locked during the mirror-down period in the camera, and it is therefore 
feasible to surely prevent the movable portion from being damaged without 
any vibrations of the movable portion due to the vibrations produced by 
the mirror-down. 
Accordingly, in the camera mounted with the shake correcting apparatus of 
the present invention, it is possible to remarkably extend a life-span of 
the shake correcting mechanism by certainly preventing the damage to the 
shake correcting mechanism due to the shake caused when photographing 
while decreasing the setting time for the shake correction. 
It is apparent that, in this invention, a wide range of different working 
modes can be formed based on the invention without deviating from the 
spirit and scope of the invention. This invention is not restricted by its 
specific working modes except being limited by the appended claims.