JP3176244B2 - Conversion adapter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conversion adapter to which an interchangeable lens can be attached.

[0002]

2. Description of the Related Art In a manufacturing site, automation is advanced, and accordingly, many image processing devices are used in each manufacturing process such as assembly and quality evaluation. The optical system of these image processing devices is C
A lens such as a mount is often used. On the other hand, with the advancement of technology in recent years, higher-resolution sensors and the like have been developed, and when they are used in manufacturing sites and the like, a 35 mm camera with a larger imaging area and better image performance than a C-mount lens. Lenses have come to be used frequently.

However, since the 35 mm camera lens has a mount different from the C mount, an adapter for changing the mount has been proposed.

[0004]

However, in recent years, the 35 mm camera system has not been able to exhibit its function sufficiently even if it is applied to a system other than the original camera system, such as an autofocus system. For example, when the control of the focus / aperture of the lens is not performed by an external mechanical link such as a camera or the like but is performed only by an electrical signal, a manual operation cannot be performed.

[0005] In order to solve such a problem, the present invention provides:
An object of the present invention is to provide a conversion adapter that can be controlled by a plurality of other systems even in a lens controlled only by an electric signal.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a conversion adapter according to the present invention, wherein a first mount on which an interchangeable lens can be mounted and an interchangeable lens mounted on the first mount. A second mount to which an optical device having a lens as a photographing optical system can be mounted, a first electric terminal provided on the first mount portion, and a second electric terminal connected to a first external control device And a third electric terminal connected to a second external control device different from the first external control device connected to the second electric terminal.

As a result, a general-purpose interchangeable lens can be controlled by a plurality of external control devices, and an interchangeable lens originally designed for a silver halide camera can be utilized.

Further, for example, control of a general-purpose interchangeable lens can be performed by program control by a computer and / or manual control by a computer.

[0009]

【Example】

(Embodiment 1) FIG. 1 shows a system using a conversion adapter for explaining a first embodiment according to the present invention. In FIG. 1, reference numeral 1 denotes a conversion adapter, 2 denotes, for example, an interchangeable lens for a single-lens reflex camera (hereinafter abbreviated as a lens), and 3 denotes an optical device such as a video camera or a scanner camera using a lens 2 as a photographing optical system, or a film camera, or image processing. Equipment (hereinafter abbreviated as camera), 4 a general-purpose computer as a first external control device for controlling the lens 2, 5
Is a second external control device for controlling the lens 2. Reference numeral 6 denotes an electric terminal serving as a first electric terminal attached to the mount 7, and reference numeral 7 denotes a mount for mounting the lens 2. Reference numeral 8 denotes a general-purpose electric terminal serving as a second electric terminal for computer communication for performing serial communication with the computer 4. Although an RS232C interface is used in this embodiment, a Centronics, SCSI, or the like may be used.

Reference numeral 9 denotes a third electric terminal for inputting a control signal of the external control device 5. Reference numeral 10 denotes a conversion circuit as first conversion means for converting a serial control signal from the computer 4 into a control signal recognizable by the lens 2 and converting a signal from the lens 2 into a serial signal recognizable by the computer 4. . Reference numeral 11 denotes a conversion circuit as second conversion means for converting a control signal of the external control device 5 into a control signal that can be received by the lens 2. A selection circuit 12 selects one of the conversion circuit 10 and the conversion circuit 11. With the system described above, the interchangeable lens for single-lens reflex camera 2
The microcomputer 2a can be controlled by the computer 4 or the external control device 5 via the interface 2b and the conversion adapter 1. The microcomputer 2a in the lens controls the actuator 2c in the lens via the control circuit 2d to drive, for example, the focus lens 2f and the diaphragm 2e.

FIG. 2 is a diagram showing an example of a circuit configuration for explaining in further detail another embodiment of the adapter 1 and the external control device 5 in FIG. 6-a is a power supply terminal (hereinafter referred to as VBAT power supply) for driving an actuator in the lens 2, 6-b is a ground terminal for the power supply terminal 6-a,
6-c is a power supply terminal (hereinafter referred to as VDD power supply) for operating the circuit system in the lens 2, and 6-d is a ground contact to the power supply contact 6-c. 6-e is a clock terminal for serial communication between the lens 2 and the conversion adapter 1, 6-f is a contact for receiving serial data from the lens 2 to the conversion adapter 1, and 6-g is a contact from the conversion adapter 1 to the lens 2. This is a contact for transmitting serial data.

Reference numeral 13 denotes a microcomputer in the conversion adapter. Reference numeral 14 denotes an RS232C serial signal connected from an external computer via a terminal 8 to +5 volts, 0
This is a level conversion circuit that converts the voltage to a logic level of volts.

A power supply control circuit 15 controls the supply of power for driving the actuator 2c in the lens 2.
The power supply control circuit 15 turns on or off power supply to the power supply terminal 6-a according to a control signal from the microcomputer 13. Reference numeral 16 denotes a power supply control circuit for controlling supply of power for operating the control circuit 2d in the lens 2. The power supply control circuit 16 turns on or off power supply to the power supply terminal 6-c according to a control signal from the microcomputer 13. I do.
PS is a power switch (main switch).

Reference numeral 17 denotes an interchangeable lens mounting detection switch, which is turned on only when the lens 2 is mounted on the mount 5 and the lens 2 reaches a position controllable by the adapter 1 through the electric signal contact 6, and the switch 17 is a microcomputer. 13 is connected. Reference numeral 18 denotes a non-volatile memory (EEPROM) which is connected to the microcomputer 13 so that data in the memory 18 can be erased, written, and read. 19
Is a mode switch, and the transfer speed of the RS232C interface is set as shown in FIG. 3 according to the state of the switches 19-a and 19-b.

In the embodiment of FIG. 2, the conversion of signals is switched by software instead of the conversion circuits 10 and 11 of FIG. 1 without using a microcomputer.

FIG. 4 is a diagram for explaining an example of the external control device 5 according to the present invention. In this embodiment, the external control device 5 is an example of a manual remote control operation unit.

Reference numerals 20 to 25 denote switches, and the switch 20 drives the focus in an infinite direction. The focus is driven in the infinite direction while the switch is turned on. The switch 21 is for driving the focus in a close direction,
While being turned on, the focus is driven in the closest direction. The switch 22 is for driving the aperture in the opening direction.
The aperture is driven in the opening direction while it is on. The switch 23 is for driving the aperture in the closing direction, and is driven in the aperture closing direction while being turned on. Switch 24
Is for switching the focus speed. The speed is high when the focus is on and low when the focus is off. Switch 25 is IRI
It is for switching S speed, it becomes high speed when on,
Slow when off.

FIGS. 5 to 12 are flowcharts for explaining the operation of the microcomputer 13. Figures 5 to 12
Will be described step by step.

<Step 101> When the main switch PS shown in FIG. 2 is turned on, the microcomputer 13 initializes a memory, an input / output port, and the like. At this time, switch 1
The transfer speed of the RS232C serial communication is also set according to the state of No. 9.

<Step 102> The contents of the nonvolatile memory 18 are read out and stored in the memory (RAM) in the microcomputer 13. Note that the nonvolatile memory 18 stores data having the contents shown in FIG. FIG.
F_MEMO0 to F_MEMO7 are stored data of the focus position and are set in association with the encode value of a focus encoder (not shown) in the lens 2. F_
SPD0 to F_SDP3 are focus speed data, which are set in association with the focus drive amount in the lens 2. I_SPD0 to I_SDP3 are set in accordance with the time intervals at which the drive of the aperture (IRIS) in the lens 2 is executed by the IRIS speed data. In addition, F_MEMO
0 to F_MEMO7 are microcomputers 1 respectively.
3 in the memories MF_MEMO0 to MF_MEMO7
_SPD0 to F_SPD3 are stored in the memories MF_SPD0 to MF_SPD3 of the microcomputer 13, respectively.
Also, I_SPD0 to I_SPD3 are memories MI_SPD0 to MI_SPD of the microcomputer 13, respectively.
3 is stored.

<Step 103> Lens mounting switch 1
The state of No. 7 is detected, and if it is on, the process proceeds to step 105 because the lens 2 is mounted. If it is off, the process proceeds to step 106.

<Step 104> In step 103,
Since it is determined that the lens 2 is not attached to the adapter 1, the power supply control circuit 16 is connected to the power supply terminal 6-
c so as not to be supplied, and the process returns to step 103.

<Step 105> In step 103,
Since it is determined that the lens 2 is attached to the adapter 1, the power supply control circuit 16 is switched from the power supply VDD to the power supply terminal 6-c.
And the process proceeds to step 106. That is, in steps 103 to 105, VDD power is not supplied until the lens 2 is mounted, and VDD is supplied when the lens 2 is mounted.

<Step 106> Since the circuit power supply VDD is supplied to the lens 2 in step 105, the electric terminals 6-
e, 6-f, 6-g, microcomputer 2a in lens 2
And the microcomputer 13 in the adapter performs bidirectional serial communication. If the serial communication is not executed normally, the process proceeds to step 107. If the serial communication has been executed normally, the process proceeds to step 108.

<Step 107> Since communication with the lens 2 is abnormal, the power supply control circuit 15 is controlled so that the power supply VBAT is not supplied to the power supply terminal 6-a, and the process returns to step 103.

<Step 108> Since the communication with the lens 2 has been normally performed, the power supply control circuit 15 is controlled so that the power supply VBAT is supplied to the power supply terminal 6-a.
Go to 9. Thus, by steps 106 to 108,
The power supply VBAT is supplied only when communication with the lens 2 is normally performed.

<Step 109> The lens 2 is controlled through the electric terminal 6 so that the aperture of the mounted lens 2 is opened.

<Step 110> Information on the open F-number and the minimum aperture F-number of the mounted lens 2 is fetched through the electric terminal 6 and stored in the memories AV_O and A_V, respectively.
Store in V_MAX.

<Step 111> The lens 2 is controlled through the electric terminal 6 so that the focus of the mounted lens 2 is driven to the nearest end.

<Step 112> The lens 2 is controlled through the electric terminal 6 so that the value of the focus encoder (not shown) of the mounted lens 2 is reset to zero.

<Step 113> The lens 2 is controlled through the electric terminal 6 so that the focus of the mounted lens 2 is driven to the infinite end.

<Step 114> The focus encoder value of the attached lens 2 is fetched through the electric terminal 6 and stored in the memory ENC_MAX.

The above steps 109 to 114 drive the aperture / focus of the mounted lens 2 to the initial position, as well as the open F-number,
The minimum aperture F number and the focus encoder value at the infinite end when the closest end is set to zero are fetched and stored in the memory, thereby reading the characteristics of the interchangeable lens.

<Step 115> The SELECT flag is set, and control from the external control device 5 is permitted.

<Step 116> An interrupt generated when communication by RS232C is received is permitted. If an interrupt occurs, RS2 from step 200 in FIG.
Proceed to the 32C communication interrupt routine.

<Step 117> If the SELECT flag is set, the control from the external control device 5 is effective, and the process proceeds to step 118. If the SELECT flag is cleared, the control from the external control signal 5 is prohibited, and the process proceeds to step 130 in FIG.

<Step 118> The state of the focus speed switching switch 24 shown in FIG. 4 is detected, and if it is on, the process proceeds to step 119; if it is off, step 1 is performed.
Proceed to 20.

<Step 119> The focus speed is driven at a high speed according to the result of the determination at step 118.
Therefore, the data of the focus speed set in the memory MF_SPD3 is copied to the memory P, and
Proceed to 21.

<Step 120> Since the focus speed is set to low speed in step 118, the memory MF_SP
The data of the focus speed set in D0 is copied to the memory P, and the process proceeds to step 121. Note that the memory M
The contents of F_SPD0 and the contents of memory MF_SPD3 are
Satisfies MF_SPD0 <MF_SPD3.

<Step 121> The state of the switch 20 is detected, and if it is on, the focus is driven in the infinite direction. Therefore, after executing the infinite focus direction activation processing subroutine in step 140, step 123
Proceed to.

<Step 122> The state of the switch 21 is detected, and if the switch 21 is on, the focus is driven in the closest direction. Therefore, after executing the near-focus direction starting process subroutine in step 150, the process proceeds to step 123. If it has been turned off, the subroutine proceeds to step 123 after executing the focus stop processing subroutine in step 160.

<Step 123> The state of the switch 25 for switching the aperture speed is detected. If the switch 25 is on, the process proceeds to step 124; if it is off, the process proceeds to step 125.
Proceed to.

<Step 124> In step 123, I
The RIS drive performs high-speed drive. Therefore, the memory MI_S
The data of the aperture speed set in PD3 is copied to the memory T, and the flow advances to step 126.

<Step 125> In step 123, I
The RIS drive performs low-speed drive. Therefore, the memory MI_S
The data of the aperture speed set in PD0 is copied to the memory T, and the flow advances to step 126.

<Step 126> The state of the switch 22 is detected, and if it is on, the IRIS is driven in the opening direction. Therefore, after executing the IRIS release direction activation processing subroutine in step 170, the process proceeds to step 130.

<Step 127> The state of the switch 23 is detected, and if it is on, the IRIS is driven in the direction to close. Therefore, after executing the IRIS narrowing-down direction start processing subroutine in step 180, the process proceeds to step 130. If the switch is off, the subroutine proceeds to step 130 after executing the focus stop processing subroutine of step 190.

FIG. 6 shows a subroutine shown in FIG.
That is, steps 140, 150, 160, 170, 1
It is a flowchart explaining 80,190.

First, steps 141 to 14 in FIG.
In Step 5, the infinite focus direction activation processing subroutine of Step 140 will be described.

<Step 141> If the in-focus in-direction driving flag is set, the subroutine is terminated without doing anything because the driving is already in the infinite direction.

<Step 142> The focus encoder value immediately before driving the focus is obtained through the electric terminal 6 and stored in the memory ENC_0.

<Step 143> The lens 2 is controlled through the electric terminal 6 so that the focus of the mounted lens 2 is driven in the infinite direction by the driving amount P.

<Step 144> The in-focus in-focus driving flag is set.

<Step 145> The flag for driving in the closest focus direction is cleared, and the subroutine ends.

Next, steps 151 to 15 in FIG.
In step 5, the near-focus direction starting processing subroutine of step 150 will be described.

<Step 151> If the in-focus close direction driving flag is set, the subroutine ends without any operation because the drive is already in the close direction.

<Step 152> The focus encoder value immediately before driving the focus is obtained through the electric terminal 6 and stored in the memory ENC_0.

<Step 153> The lens 2 is controlled through the electric terminal 6 so that the focus of the mounted lens 2 is driven in the close direction by the driving amount P.

<Step 154> Set the close-in-focus direction driving flag.

<Step 155> The in-focus in-direction driving flag is cleared, and the subroutine ends.

Next, steps 161 to 16 in FIG.
In step 3, the focus stop processing subroutine in step 160 will be described.

<Step 161> The lens 2 is controlled through the electric terminal 6 so as to stop the focus of the mounted lens 2.

<Step 162> The in-focus in-direction driving flag is cleared.

<Step 163> The flag for driving in the closest focus direction is cleared, and the subroutine ends.

Steps 171 to 1 in FIG.
Reference numeral 77 denotes an IRIS release direction activation subroutine in step 170.

<Step 171> Whether the aperture is currently in the open state is obtained from the lens 2 through the electric terminal 6, and if it is in the open state, no further driving in the opening direction is possible, so the subroutine is terminated without doing anything. I do. If it is not in the open state, the process proceeds to step 172.

<Step 172> If the aperture opening direction driving flag is set, the subroutine ends without any operation because the aperture opening direction is already being driven.

<Step 173> The lens 2 is controlled through the electric terminal 6 so that the aperture of the mounted lens 2 is driven in the opening direction by ８ step.

<Step 174> A timer is started so that an interrupt occurs at time T.

<Step 175> The timer interrupt occurrence flag is cleared.

<Step 176> An aperture opening direction driving flag is set.

<Step 177> The driving flag in the narrowing-down direction is cleared, and the subroutine ends.

Steps 181 to 1 in FIG.
Reference numeral 87 denotes an IRIS narrowing-down direction starting subroutine in step 180.

<Step 181> Whether or not the aperture is currently in the minimum aperture state is obtained from the lens 2 through the electrical terminal 6. If the aperture is in the minimum aperture state, no further drive in the aperture stop direction is possible, so no subroutine is performed without any operation. To end. If it is not in the minimum aperture state, step 1
Go to 82.

<Step 182> If the driving flag in the narrowing-down direction has been set, the subroutine ends without performing any operation because it is already driven in the narrowing-down direction.

<Step 183> The lens 2 is controlled through the electric terminal 6 so that the aperture of the mounted lens 2 is driven in the direction of narrowing down by ８ step.

<Step 184> A timer is started so that an interrupt occurs at time T.

<Step 185> The timer interrupt occurrence flag is cleared.

<Step 186> The flag in the narrowing-down direction is set.

<Step 187> The flag indicating that the aperture opening direction is being driven is cleared, and the subroutine ends.

Next, steps 191 to 19 in FIG.
In step 3, the IRIS stop processing subroutine of step 190 will be described.

<Step 191> The lens 2 is controlled through the electric terminal 6 so as to stop the IRIS of the mounted lens 2.

<Step 192> The flag in the focusing direction is cleared.

<Step 193> The open direction driving flag is cleared, and the subroutine ends.

In steps 118 to 127, the focus and the start and stop of the IRIS are controlled based on the signal from the external control device, in this embodiment, the signal corresponding to the state of the switch. In this embodiment, focus and IRI
Although only S has been described, zoom and other optical actuators, for example, optical means for correcting optical blur and optical means for obtaining a high resolution by optically shifting an image are provided in the lens. The control may be performed from an external control device.

Steps 200 to 201 in FIG.
This is to explain an interrupt operation due to the reception of the S232C communication.

<Step 200> The SELECT flag is cleared and control from the external control device is prohibited. That is, only control from the external computer by the RS232C is enabled.

<Step 201> The received commands are analyzed, and the process proceeds to each command reception processing routine.

Steps 202 to 207 in FIG. 7B are for explaining the processing when a command for driving the focus in the infinite direction is received.

<Step 202> Memory MF_SPD0
Is copied to the memory P.

<Step 203> If the in-focus in-direction driving flag is set, the communication interrupt routine is terminated without any operation because the driving is already in the infinite direction.

<Step 204> The focus encoder value immediately before driving the focus is obtained through the electric terminal 6 and stored in the memory ENC_0.

<Step 205> The lens 2 is controlled through the electric terminal 6 so that the focus of the mounted lens 2 is driven in the infinite direction by the driving amount P.

<Step 206> The in-focus in-focus driving flag is set.

<Step 207> The close-in-focus direction driving flag is cleared, and the communication interrupt routine ends.

Steps 211 to 216 in FIG. 7C are for explaining the processing when a command for driving the focus in the closest direction is received.

<Step 211> Memory MF_SPD0
Is copied to the memory P.

<Step 212> If the focus close direction drive flag is set, the communication interrupt routine is terminated without any operation because the drive is already performed in the close direction.

<Step 213> The focus encoder value immediately before driving the focus is obtained through the electric terminal 6 and stored in the memory ENC_0.

<Step 214> The lens 2 is controlled through the electric terminal 6 so that the focus of the mounted lens 2 is driven in the close direction by the driving amount P.

<Step 215> Set the close-in-focus driving direction flag.

<Step 216> The in-focus in-direction driving flag is cleared, and the communication interrupt routine ends.

Steps 221 to 223 in FIG. 7D are for explaining processing when a command to stop focusing is received.

<Step 221> The lens 2 is controlled through the electric terminal 6 so that the focus driving of the mounted lens 2 is stopped.

<Step 222> The flag in the near-focus direction is cleared.

<Step 223> The in-focus in-direction driving flag is cleared, and the communication interrupt routine ends.

Step 231 in FIG. 7E explains the processing when a command for setting the focus speed is received.

<Step 231> Memory MF_SPD0 to MF_SPD3 according to received focus speed number
Is copied to the memory P, and the communication interrupt routine is terminated.

Steps 241 to 242 in FIG. 8A are for explaining processing when a command for storing the focus position is received.

<Step 241> The focus encoder value is fetched from the lens 2 through the electric terminal 6 and stored in the memory MF_MEMO0 to MF_ according to the received storage number.
Store in MEMO7.

<Step 242> The focus encoder value is fetched from the lens 2 through the electric terminal 6 and the nonvolatile memory F_MEMO0 is read in accordance with the received storage number.
Writing to F_MEMO7, the communication interrupt routine ends.

Steps 251 to 256 in FIG. 8 (b) are for explaining processing when a command for driving to the stored focus position is received.

<Step 251> The data in the memories MF_MEMO0 to MF_MEMO7 is stored in the memory ENC_2 according to the received storage number. That is, ENC_
The data stored in 2 indicates the target encoder value of the focus to be driven from now on.

<Step 252> The current focus encoder value of the lens 2 is fetched through the electric terminal 6 and stored in the memory ENC_0.

<Step 253> Memory ENC_ 0 and E
The amount to be driven is calculated from NC_2 and stored in the memory P ′. Note that P '= ENC_2−ENC_0.

<Step 254> The lens 2 is controlled through the electric terminal 6 so as to drive the focus of the mounted lens 2 by the drive amount P ′.

<Step 255> The in-focus in-focus direction driving flag is cleared.

<Step 256> The flag in the near-focus direction is cleared, and the interrupt routine is terminated.

Steps 261 to 268 in FIG. 9A are for explaining processing when a command for driving the aperture in the opening direction is received.

<Step 261> Whether or not the aperture is currently open is obtained from the lens 2 through the electric terminal 6. If the aperture is open, no further drive in the opening direction is possible, so the interrupt routine is executed without doing anything. finish. If it is not in the open state, the process proceeds to step 262.

<Step 262> Memory MI_SPD0
The data of the currently set aperture speed number from .about.MI_SPD3 is copied to the memory T.

<Step 263> If the aperture opening direction driving flag is set, the interrupt routine is terminated without any operation because the aperture opening direction is already being driven.

<Step 264> The aperture of the mounted lens 2 is driven in the opening direction by １ ／ -stop in the open direction.
The lens 2 is controlled through the electric terminal 6.

<Step 265> A timer is started so that an interrupt occurs at time T.

<Step 266> The timer interrupt occurrence flag is cleared.

<Step 267> An aperture open direction driving flag is set.

<Step 268> The flag for driving in the narrowing-down direction is cleared, and the subroutine ends.

Steps 271 to 278 in FIG. 9 (b) are for explaining the processing when the command to drive the aperture down and to open the aperture is received.

<Step 271> Whether or not the aperture is currently in the minimum aperture state is obtained from the lens 2 through the electric terminal 6, and if the aperture is in the minimum aperture state, no further driving in the direction of narrowing down is performed, so the interruption is performed without any operation. End the routine. If it is not in the minimum aperture state, the process proceeds to step 272.

<Step 272> Memory MI_SPD0
The data of the currently set aperture speed number from .about.MI_SPD3 is copied to the memory T.

<Step 273> If the narrowing direction driving flag has been set, the interrupt routine is terminated without any operation because it is already being driven in the narrowing direction.

<Step 274> The lens 2 is controlled through the electric terminal 6 so that the aperture of the mounted lens 2 is driven in the direction of stopping down by １ ／ step.

<Step 275> A timer is started so as to generate an interrupt at time T.

<Step 276> The timer interrupt occurrence flag is cleared.

<Step 277> The flag in the narrowing-down direction is set.

<Step 278> The flag indicating that the aperture opening direction is being driven is cleared, and the subroutine ends.

Steps 281 to 284 in FIG. 9C are for explaining the processing when a command to stop the aperture drive is received.

<Step 281> The lens 2 is controlled through the electric terminal 6 so that the drive of the aperture of the mounted lens 2 is stopped.

<Step 282> The timer interrupt occurrence flag is cleared.

<Step 283> The flag in the narrowing-down direction is cleared.

<Step 284> The flag indicating that the aperture opening direction is being driven is cleared, and the subroutine ends.

Step 291 in FIG. 9D describes the processing when a command for setting the aperture drive speed is received.

<Step 291> The speed data from the memories MI_SPD0 to MI_SPD3 is copied to the memory P in accordance with the received aperture drive speed number, and the communication interrupt routine ends.

Step 295 in FIG. 9E allows the external control device to control the lens 2.

<Step 285> The SELECT flag is set to enable control by the external control device until the next control by the RS232C, and the communication interrupt routine ends.

In FIG. 10, it is necessary to cause the lens 2 to perform various operations in response to a control signal from an external control device or a command from a computer by RS232C. In steps 130 to 133, it is determined whether or not to perform focus or IRIS driving, and respective processes are performed.

<Step 130> If the infinity driving flag is set, the process for infinite driving is performed in step 300, and the routine proceeds to step 132.

<Step 131> If the close-in-progress flag is set, a process for close drive is performed in step 310, and the routine proceeds to step 132.

<Step 132> If the open drive flag is set, a process for opening drive is performed in step 320, and the process returns to step 117.

<Step 133> If the stop-in-driving flag is set, the process for the stop-down drive is performed in step 330, and the process returns to step 117.

Steps 301 to 307 of FIG. 11A show an infinite drive subroutine of step 300.

<Step 301> The focus encoder value is fetched from the lens 2 through the electric terminal 6 and stored in the memory ENC_1.

<Step 302> The focus encoder value ENC_0 obtained last time is compared with the ENC_ obtained this time. If the value has not changed, the process proceeds to step 305. If the value has changed, the process proceeds to step 303.

<Step 303> The contents of the focus encoder value ENC_1 obtained this time are stored in the memory ENC_0.
And updates ENC_0.

<Step 304> Attached lens 2
Is driven to the infinity side by the driving amount P,
The lens 2 is controlled through the electric terminal 6.

<Step 305> Whether or not the focus has reached the infinity end is fetched from the lens 2 through the electric terminal 6, and if the focus has not reached the infinity end, the subroutine is terminated as it is. If it has reached the infinite end, the process proceeds to step 306.

<Step 306> The lens 2 is controlled through the electric terminal 6 so as to stop the focus of the mounted lens 2.

<Step 307> The in-focus in-direction driving flag is cleared, and the subroutine ends.

Steps 311 to 317 of FIG. 11B show a subroutine for the closest drive of step 310.

<Step 311> The focus encoder value is fetched from the lens 2 through the electric terminal 6 and stored in the memory ENC_1.

<Step 312> The focus encoder value ENC_0 acquired last time is compared with the ENC_ acquired this time. If the value has not changed, the process proceeds to step 315. If the value has changed, the process proceeds to step 313.

<Step 313> The content of the focus encoder value ENC_1 obtained this time is stored in the memory ENC_0.
And updates ENC_0.

<Step 314> Attached Lens 2
Is driven by the drive amount P to the nearest side,
The lens 2 is controlled through the electric terminal 6.

<Step 315> Whether or not the focus has reached the closest end is fetched from the lens 2 through the electric terminal 6, and if not, the subroutine is terminated as it is. If it has reached the closest end, the process proceeds to step 316.

<Step 316> The lens 2 is controlled through the electric terminal 6 so as to stop the focus of the mounted lens 2.

<Step 317> The flag in the near-focus direction is cleared, and the subroutine ends.

Steps 321 to 328 of FIG. 12A show a subroutine of the aperture opening drive of step 320.

<Step 321> If the timer interrupt occurrence flag has not been set, the time T has not elapsed since the previous aperture drive, and the opening drive subroutine is terminated as it is. If the timer interrupt occurrence flag is set, the process proceeds to step 322.

<Step 322> Whether or not the aperture of the mounted lens 2 is in the open state is fetched through the electric terminal 6, and if it is in the open state, there is no need to further drive in the opening direction, so the process proceeds to step 326. .

<Step 323> Set the aperture of the lens 2 to 1 /
The lens 2 is controlled through the electric terminal 6 so as to be driven in the opening direction by eight steps.

<Step 224> A timer is started so that an interrupt occurs at time T.

<Step 325> The timer interrupt occurrence flag is cleared, and the subroutine ends.

<Step 326> The lens 2 is controlled through an electric terminal so as to stop driving the aperture of the mounted lens 2.

<Step 327> The flag in the aperture opening direction driving flag is cleared.

<Step 328> The timer interrupt occurrence flag is cleared and the subroutine is terminated.

Steps 331 to 338 in FIG. 12B show a subroutine of the narrowing-down drive in step 330.

<Step 331> If the timer interrupt occurrence flag has not been set, the time T has not elapsed since the previous aperture driving, and the aperture driving subroutine is terminated as it is. If the timer interrupt occurrence flag has been set, the process proceeds to step 332.

<Step 332> It is determined whether or not the aperture of the attached lens 2 is in the minimum aperture state by the electric terminal 6.
If it is in the minimum aperture state, there is no need to drive in the further aperture direction, so the process proceeds to step 336.

<Step 333> Set the aperture of the lens 2 to 1 /
The electric terminals 6 are driven so as to be narrowed down by eight steps.
Lens 2 is controlled through

<Step 334> A timer is started so that an interrupt occurs at time T.

<Step 335> The timer interrupt occurrence flag is cleared, and the subroutine ends.

<Step 336> The lens 2 is controlled through an electric terminal so as to stop driving the aperture of the mounted lens 2.

<Step 337> The driving flag in the focusing direction is cleared.

<Step 338> The timer interrupt occurrence flag is cleared and the subroutine is terminated.

Step 340 in FIG. 12C is an interrupt routine when a timer interrupt occurs.

<Step 340> Since the timer T generates a timer interrupt, the timer interrupt generation flag WPO
Set and end the interrupt routine.

As described above, in this embodiment, immediately after the main switch PS is turned on, the lens 2 is controlled by both the control by the control signal from the external control device 5 and the control by the computer 4 by the RS232C. Control is possible, but once control from the computer by the RS232C is executed, control from the external control device is prohibited thereafter until a specific command is received from the computer.

Embodiment 2 FIG. 14 is a circuit diagram for explaining an adapter 1 and an external control device 5 according to a second embodiment of the present invention. The same parts as those in FIG.
Detailed description is omitted.

In FIG. 14, reference numeral 26 denotes a switch. When the switch 26 is on, control from the computer by the RS232C is selected. When the switch 26 is off, control from an external control device is selected.

FIG. 15 is a flow chart for explaining the operation of the microcomputer 13 in the present embodiment. The same reference numerals as those in the flow chart of FIG. 5 denote the same steps, and a description thereof will be omitted.

Steps 101 to 114 are the same as the operations in FIG.

<Step 415> Switch 26 in FIG.
If it is on, the process proceeds to step 416; if it is off, the process proceeds to step 118.

Steps 118 to 130 are the same as the steps in FIG.

<Step 416> An interrupt generated when communication by RS232C is received is permitted, and the flow advances to step 130. Subsequent steps up to step 133 and steps 300, 310, 320 and 330 are the same as those in FIG. When an interrupt occurs, the process proceeds to the RS232C communication interrupt routine from step 500 in FIG.

The subroutine shown in FIG. 15, that is, steps 140, 150, 160, 170 and 18
0 and 190 have been described with reference to FIGS.

Step 500 in FIG. 16 explains an interruption due to the reception of the RS232C communication.

<Step 500> The received commands are analyzed, and the process proceeds to each command reception processing routine. The command reception processing routines are the same as the routines shown in (b) to (e) of FIG. 7, (a) to (b) of FIG. 8, and (a) to (d) of FIG. I do.

As described above, in the second embodiment, the switch 26
Depending on the state, either the control by the control signal from the external control device 5 or the control from the computer 4 by the RS232C can be selected.

(Embodiment 3) FIG. 17 is a circuit diagram illustrating an adapter 1 and an external control device 5 according to a third embodiment of the present invention. The same parts as those in FIG.

In FIG. 17, reference numeral 27 denotes a non-volatile memory, which is connected to the microcomputer 13;
Erasing, writing, and reading of data in the memory are controlled by the microcomputer 13.

FIG. 18 is a flowchart for explaining the operation of the microcomputer 13 in the third embodiment. The same reference numerals as those in FIG. 5 indicate the same steps.

Steps 101 to 114 and steps 118 to 133 are the same operations as those in the flowcharts of FIGS. Subsequent step 13
Up to 3 and steps 300, 310, 320 and 330 are also the same as in FIG. Further, the subroutine shown in FIG.
70, 180, and 190 have been described with reference to FIGS.

In this embodiment, the contents of the non-volatile memory 27 shown in FIG. 17 are read in step 102 and stored in the memory of the microcomputer 13. Note that the nonvolatile memory 27 stores data having the contents shown in FIG. In FIG. 19, F_MEMO0 to F_MEMO
Reference numeral 7 denotes storage data of a focus position, which is set by a value from a focus encoder (not shown) in the lens 2.
F_SPD <b> 0 to F_SDP <b> 3 are focus speed data and are set by a focus drive amount in the lens 2. I_
SPD0 to I_SDP3 are set by IRIS speed data at time intervals at which the driving of the aperture (IRIS) in the lens 2 is executed. As for MODE, control from the computer by RS232C is selected when 00H is written, and control from an external control device is selected when FFH is written. In addition, F_MEMO0
F_MEMO7 is stored in the memories MF_MEMO0 to MF_MEMO7 of the microcomputer 13 respectively.
PD0 to F_SPD3 are respectively stored in the memories MF_SPD0 to MF_SPD3 of the microcomputer 13, and I_SPD0 to I_SPD3 are respectively stored in the memories MI_SPD0 to MI_SPD3 of the microcomputer 13.
Similarly, MODE is stored in the memory M_MODE.

<Step 615> If the content of the memory M_MODE is 00H, the flow proceeds to step 416; if it is FFH, the flow proceeds to step 118.

<Step 416> An interrupt generated when communication by RS232C is received is permitted, and the flow advances to step 130. When an interrupt occurs, the process proceeds to the RS232C communication interrupt routine from step 500 in FIG.

The interrupt processing routine by the reception of the RS232C communication has been described with reference to FIGS.

In the third embodiment, the M of the nonvolatile memory 27
Depending on the contents written in the ODE, one of the control by the control signal from the external control device 5 and the control from the computer 4 by the RS232C can be selected.

[0207]

By using the conversion adapter according to the present invention, even a general-purpose interchangeable lens controlled only by an electric signal can be easily controlled by a plurality of other computers or the like. Since the conversion adapter can be switched, this conversion adapter can be applied to various systems, and there is an effect that it can be used for many purposes.

[Brief description of the drawings]

FIG. 1 is a configuration diagram for explaining an example of a system using a conversion adapter according to the present invention.

FIG. 2 is a diagram showing a first embodiment of a circuit configuration of a conversion adapter.

FIG. 3 is a diagram showing a relationship between a switch 15 and a baud rate of RS232C.

FIG. 4 is a diagram illustrating a configuration example of an external control device.

FIG. 5 is a flowchart illustrating an operation example of the conversion adapter according to the first embodiment.

FIG. 6 is a flowchart illustrating an operation example of the conversion adapter according to the first embodiment.

FIG. 7 is a flowchart illustrating an operation example of the conversion adapter according to the first embodiment.

FIG. 8 is a flowchart illustrating an operation example of the conversion adapter according to the first embodiment.

FIG. 9 is a flowchart illustrating an operation example of the conversion adapter according to the first embodiment.

FIG. 10 is a flowchart illustrating an operation example of the conversion adapter according to the first embodiment.

FIG. 11 is a flowchart illustrating an operation example of the conversion adapter according to the first embodiment.

FIG. 12 is a flowchart illustrating an operation example of the conversion adapter according to the first embodiment.

FIG. 13 is a list showing an example of data stored in a nonvolatile memory.

FIG. 14 is a diagram showing a second embodiment of the circuit configuration of the conversion adapter.

FIG. 15 is a flowchart illustrating the operation of the conversion adapter according to the second embodiment.

FIG. 16 is a flowchart illustrating the operation of the conversion adapter according to the second embodiment.

FIG. 17 is a circuit configuration diagram of a third embodiment of the conversion adapter.

FIG. 18 is a flowchart illustrating an operation of the conversion adapter according to the third embodiment.

FIG. 19 is a diagram illustrating a list of examples of data stored in a nonvolatile memory 27 according to the third embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conversion adapter 2 Interchangeable lens 3 Image processing equipment 4 Computer 5 External control device 6 Electric terminal 7 Mount 8, 9 Electric terminal 10, 11 Conversion circuit 12 Selection circuit 13 Microcomputer 14 Level conversion circuit 15, 16 Power supply control circuit 17 Switch 18 Nonvolatile memory 19 to 26 Switch 27 Nonvolatile memory

Continuation of the front page (56) References JP-A-4-243236 (JP, A) JP-A-63-199335 (JP, A) JP-A-5-91384 (JP, A) JP-A-6-301111 (JP, A) JP-A-6-317736 (JP, A) JP-A-6-95199 (JP, A) JP-A-5-103248 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB G03B 7/20

Claims (7)

(57) [Claims] 1. A first mount to which an interchangeable lens can be mounted, a second mount to which an optical device having an interchangeable lens attached to the first mount as a photographic optical system can be mounted, and a first mount unit A second electric terminal connected to the first external control device, a second electric terminal connected to the first external control device, and a second electric terminal different from the first external control device connected to the second electric terminal. A third electrical terminal connected to the external control device;
A conversion adapter. 2. The method according to claim 1, wherein the first conversion unit converts a signal input from the second electric terminal and outputs the converted signal to the first electric terminal; Second converting means for converting and outputting to the first electric terminal, one of the first converting means and the second converting means,
Alternatively, a conversion adapter having selection means for selecting both. 3. The conversion adapter according to claim 2, wherein the selection means is controlled by an external switch or a built-in switch. 4. The conversion adapter according to claim 2, wherein the selection means is controlled by data stored in a readable and writable nonvolatile memory. 5. The method according to claim 2, wherein the selection means selects the first conversion means after the power is turned on until a signal is input from the second electric terminal, and the signal is input from the second electric terminal. A conversion adapter, wherein the second conversion means is selected according to the above. 6. The method according to claim 2, wherein the selecting means is capable of selecting the second converting means based on a signal inputted from the second electric terminal when the first converting means is selected. Conversion adapter. 7. The conversion adapter according to claim 1, wherein the second external control device is not a computer.