JPS59140427A - Automatic focus adjusting device of lens interchangeable type camera - Google Patents

Abstract

PURPOSE:To determine a driving direction of a driving means basing on the driving direction of the driving means and a shift direction from a detecting means, which are prescribed clearly to a photographic lens for which the driving means drives a focusing lens in the feed-out direction. CONSTITUTION:In case of having a focus adjusting mechanism by which a focusing lens FL of a photographic lens is fed out by a clockwise rotation of a motor MO of a camera body side, a terminal (c) of a discriminating circuit 109 is at High. In this case, in case of a front focus, terminals (a), (b) of a motor driving circuit MDR are at Low and High, and in case of a rear focus, they are at High and Low. Accordingly, in case of the front focus, the motor MO rotates counter-clockwise and the focusing lens FL is fed in. Also, in case of the rear focus, the motor MO rotates clockwise and the focusing lens FL is fed out. Subsequently, in case of having a focus adjusting mechanism by which the focusing lens FL is fed out by a counterclockwise rotation of the motor MO of the camera body side, the terminal (c) of the discriminating circuit 109 is Low. In this case, the device operates in the opposite way to the foregoing, and moves the lens to a focused position.

Description

[Detailed description of the invention]

TECHNICAL FIELD The present invention provides a camera with a detecting means for detecting the direction of deviation of the imaging position of a target object from a predetermined focus position, and a driving means for driving the focusing lens of the Odishō lens based on the direction of the deviation. It relates to an automatic focus adjustment device for an interchangeable lens camera equipped on the main body side. PRIOR ART Defocus direction data indicating whether the imaging position of the target object is in front or behind the expected focus position is detected from the detection means.

[, With the deviation direction data of this detection means,
A lens that uniquely determines the direction of rotation of the drive means.
A number of conventional automatic focus detection devices for interchangeable cameras have been proposed.
has been done. However, in these devices, for example, the drive means is driven in one direction at a time.
When rotating, the lens for 74-waste is always extended.
The rotational direction of the drive means and the focusing lens should be adjusted so that
It was necessary to always match the direction of movement. That is,
Transmission that transmits the rotational force of the driving means to the focusing lens
The transmission system of the mechanism has the above relationship regardless of the type of interchangeable lens.
The transmission structure of various interchangeable lenses is configured to meet the
was. Therefore, depending on the interchangeable lens, the above relationship may be 1.
In order to configure the transmission mechanism so that
The burden increases, the transmission mechanism becomes complicated, and the need for interchangeable lenses increases.
There were inconveniences such as it becoming shaped and heavy.
. In addition, the driving direction of the driving means and the movement of the focusing lens are
It has a transmission mechanism whose relationship with the direction of motion is opposite to the above.
Interchangeable lenses that focus only when attached to the camera body.
The focus lens is driven in the opposite direction to the position.
However, it also had the disadvantage that it could not be used for automatic focus adjustment.・1st disturbance The present invention is based on the driving direction of the driving means on the camera body side and the exchange lever.
The moving direction of the focusing lens on the lens side has a predetermined relationship.
A record that can perform automatic focus adjustment, regardless of whether it is
J:Uto provides automatic focus adjustment devices for interchangeable lens cameras.
It is something to do. 1 In the present invention, the driving means moves the focusing lens in the feeding direction.
Driving hand determined according to the photographic lens for driving
Based on the driving direction of the step and the direction of deviation from the detection means,
The driving direction of the driving means is determined. Embodiment Outline of camera system for automatic focus adjustment according to the present invention
An example of an interchangeable lens camera is an eye reflex camera.
This will be explained based on Figure 1. In Figure 1, the dashed line
On the left is a zoom lens as an example of a LE lens.
, the right side is the camera body (BD), and both are
Mechanically connected via latches (101) and (102)
Terminal LIL'l) ~ (JL5), LIB'1) ~ - Cas
lens (FL), zoom lens (ZL), mass
The subject light that has passed through the lens (ML) enters the camera body (8
Transmits through the medium-light semi-transparent part of the reflective mirror (103) of D>.
, J is reflected by the sub-mirror (104) for focus detection.
The optical system is configured so that the light is received by the light receiving section (FLM).
has been completed. The IG processing circuit (105) is a focus detection light receiving section (F L
Based on the signal from M), the deviation from the focus position is detected.
Indication differential A - Scrap suspension lΔL1 Diff J - Scrap direction (front
(pin, rear bin). Motor (MO
) is driven by the motor drive circuit (MDR) described later.
Based on these data and the γ value described below, C
selectively rotates in one direction and counterclockwise CF direction;
is the slip mechanism (S l-1), the drive mechanism (L
D R>, via clutches (101) and (102)
transmitted to the transmission mechanism (100) of the photographic lens (LE).
It will be done. At this point, the force lens (FL) comes out.
The focal point is adjusted by adjusting the focus. In addition, the slip mechanism (SLP) is attached to the driven part of the photographic lens.
When a torque exceeding the specified level is applied, the motor (
This is to prevent overload from being applied to MO>.
Ru. The lens circuit (LEC) on the shooting lens side has a camera
The photographic lens required for automatic black and white vA adjustment control on the main body side
Transmitter! Unique plurality depending on the transmission system of M (100)
data is fixedly stored. These data are
Moving direction of lens (FL) and motor (MO>)
The direction of rotation of l! I section (for example, focus lens
Feeding J indicates whether the motor should rotate clockwise or not.
Focus on the rotation direction data and the above-mentioned defocus amount.
Conversion coefficient data for converting to the amount of movement of the lens for
etc. These data of the lens circuit (LFC) are shown above.
The reading circuit (LDC) on the camera body side is
) is read. The number of strokes M (106) is the reading circuit
(LDC) and the signal processing circuit (1
Multiply the defocus amount 1ΔL1 from 05) to obtain the focal length.
To drive the focus lens (FL) to the in-focus position.
The necessary drive allows the focus lens (F L ) to be hung at a specified level.
Outputs a pulse every time a rib is driven. Counter (107)
The pulse from 1-1-G (ENC) is ■! count
. In addition, this 81 value is for the focus lens (FL).
Move simply. The comparison circuit (108)
γ from the path (106) and from the counter (107)
Compare the data and if the two match, focus lens
This means that the lens (, FL) has reached the in-focus position.
-Gives a drive stop signal to the drive circuit (MDR). The motor drive circuit (MDR) is (n@processing circuit (10
5) Based on the defocus direction data from
, children (a), (b) as i H1,h+= or "l-
ow”.Here, terminals (a) and (b) are, for example,
, it is necessary to extend the lens using a motor drive during a bottle breakage.
If the
', if it is necessary to retract with the front pin = 110. II
. At "11 igl+", stop the motor when focused.
If so, l L 0WTl , l゛l O,II
bawl. The discrimination circuit (109) is a reading circuit (LDC).
Output terminal (C) based on the read rotation direction data.
is set to ``High'' or ``low''. child
Here, the terminal (C) is
If it indicates that the lens is extended when rotating in the direction,
The lens extends when rotated counterclockwise to PATO+i, l, and IT.
If it indicates that the
Ru. In addition, one motor terminal (d>, (0) is "Lo"
When the motor (MO
) is assumed to rotate in the hour 31 direction. Direction determining circuit and
The decoder (110) as shown in FIG.
At the input level of children (a), (b), (C)
so that the output level of terminals (d) and (e) changes accordingly.
This specifies that the motor (MO) clock
Direction or counterclockwise rotation and stop is determined
. The operation of this camera system with the above configuration is described below.
do. First, the camera lens attached to the camera body (BD)
(LE) is the timer of the motor (MO>) on the camera body side.
By rotating in one direction, the focus lens (F
If L) is on the right side of the focus adjustment n that is extended, it is determined that
The terminal (C) of the circuit (109) is 'igl+'.
It has become. At this time, if the front pin is
(MDR) terminals (a) and (b) are “Low”
, "@igh", if it is the back bin, "1" i
gh”, “LOW”. Therefore,
, if the front pin is the motor (MO) terminal (d), (0
) is “' l-l ighol, -I L 0W
II, the motor (MO) rotates counterclockwise.
The focusing lens (FL) is retracted. Also, after
In the case of a bottle, this is the motor (MO) terminal (d). (0) is *lowll, ゛′toB, h+i
Then, the motor (MO) rotates in the 51 direction and the C
The lens for the cassette (F L ) is fed out. As the motor (MO) rotates, the encoder (ENC)
By counting the pulses output from J, the counting circuit (
107) is the movement of the focusing lens (F L )1. I
Output data indicating J m. On the other hand, multiplication 0 circuit (1
06) is the defocus from the signal processing circuit (105)
By the hanging and the conversion coefficient from the reading circuit (L l) C)
, drive the focus lens (F L ) to the in-focus position
Output 1 data indicating the drive fJl frl required to
ing. Therefore, the focus lens (FL) is at the in-focus position.
When the IC reaches the position, both data match, so compare
A drive stop signal is sent from the circuit (108) to the motor drive circuit (
MDR). This allows terminals (a), (
b) is I LOWI11 = L 0W11, terminal
(d>, (Q) is “Low”. The motor (MO) stops rotating when it becomes “Low”.
do. Next, the photographic lens (L) attached to the camera body (BD>
E) is the counterclockwise direction of the motor (MO) on the camera body side.
Structure in which focus lens (FL) is extended by rotation.
If the focus adjustment mechanism has a focus adjustment mechanism of
) terminal (C) is "Low". In this case, contrary to the above
For the pair, the front pin terminals (d) and (e) are
”. 1 = 14 igh II, motor (MO)
rotates clockwise and the focus lens (FL) is hit.
be included. After the IC% pin is connected to the terminal (d), ((ri is "l"
-4igh",'"Low and mode.
The focus lens (MO) rotates in the opposite direction Ω1.
The nuts are rolled out. As above, focus lens
until the motor (MO>) is in focus position.
is driven. In addition, in the explanation regarding FIG.
The equipment of the present invention has been described in order to make it easier to understand its functions and operations.
F? is constructed by the combination U of circuit blocks.
However, in reality, the functions of each of those circuit boards are
Head/υdo is a microcomputer as described below.
This is accomplished by a computer (hereinafter referred to as a microcomputer). The first figure is the camera body (B) of the configuration shown in Figure 1.
1. ) This is a block diagram mainly showing the configuration of the circuit section on the ) side.
Ru. In the figure, the camera body (BD) and lens (+-E
) Let's compare the focal length PA of Shins (L-E).
For example, a converter (CV
) has been inserted. Camera body (BD> and] converter
The inverter (CV) and lens are connected respectively.
(L[) is the connection terminal group (CN 3) and (C
N4) is connected to the converter (CV) and
Various information from the lens (LE) and the camera body (13D
> It is designed to be given to the side. Power switch (
MAS) is closed, the power-only safety
1 circuit (PORI), microcontroller (MCI), (MC2)
, display control circuit (DSC), oscillation circuit (O20), input
Inverter (INl) ~ (IN8), AND circuit (AN
1) Power supply is started via the power supply line (10F). By starting this power supply, the power-on reset circuit (POR)
1) The reset signal (PO1) is output and the microcontroller
(MCI), (MC2) and display control circuit (
DSC) is reset. The microcontroller (MC2) is this
Performs the entire operation of the camera system in sequence.
Microcomputer (MCI)
In response to the control signal from this microcontroller 1 (MC2),
Sequence the focus adjustment operation and select the first signal.
For the 1° metering suite (MES) shown in the figure, press the release button (
(not shown) is closed in the first step of the pressing operation, and this light
When the inverter (INI) is opened, the inverter (INI)
Input terminal of microcomputer (MC2) via <+o>
ni” +-+ igh +1 Rehernoig M is given
I'm confused. In response to this, the microcomputer (MC2) terminal (
00) becomes +-+t51b'', and the inverter (I
The transistor (B-rl) becomes conductive via N2). Due to the conduction of this i-transistor (8 transistors, 1), the power
reset circuit (POR3), Ill optical circuit (LM
C), decoder (DECl), light emitting diode drive
transistor (Br3), film sensitivity setting device (SSE)
), aperture setting device (ASE), exposure time setting device (T
SE), exposure control mode setting device (MSE), exposure control a
Power line to ll device (EXC) and latch circuit (LA)
<VB)? Power supply is started via the This power supply starts.
and reset from the power-on reset circuit (poR3).
The signal (P03) is output and the exposure control filter (EX
C) is reset to 1~. In addition, the microcontroller (MC2)
The “High” level signal from the output terminal (00) is
The converter (CV) and recorder are connected by the buffer (B F ).
As the power supply voltage (■) of the lenses (LE), the connection terminal group (
CNI). (CN 2) , (CN 3) , (CN
4) through the circuit (C:V) in the converter (C:V).
VC) and the circuit (LEC) in the lens ([E)
It will be done. In addition to this power supply terminal, the connection terminal group includes
Output from the output terminal (06) of the controller (MC2)
Reset the converter circuit (CVC) and lens circuit (LEC).
A signal transmission terminal for releasing from the set state and a microphone
The clock output terminal (SCO) of the controller (MC2)
The periodic clock pulse is converted into a converter circuit (CVC),
Clock pulse transmission for transmission to circuit (LEG)
terminal and the serial data input terminal of the microcontroller (MC2) (
SDI> from converter (CV) and lens (LE)
A signal input terminal for inputting data and a (MC2)
Figure 4 shows the circuit configuration of the serial data input section.
CV) circuit (CVC) and lens (shiE) circuit (
The circuit configuration of J0 (LEC) is shown in Figure 6. The photometry circuit (LMG) is an analog of the microcontroller (MC2).
Insert the photometric symbol of the analog value into the input terminal (△Nt).
Reference voltage signal for D-A conversion to quasi-voltage input terminal (VR)
is giving. The microcomputer (MC2) has a photometry circuit (L,
Based on the reference voltage J [signal from terminal (A
Analog [l photometric signal input to N+]
Convert to. The display control circuit (DSC) is connected to the data bus (
Depending on the various data sent via the DB), the LCD display
The display (DSP) displays and emits the exposure control value.
By photodiode (1-Dlo) ~ (LDIn)
Display warning signs, etc.). Output terminal of microcomputer (MC2)
(08) is set after the photometry switch (YES) is closed.
Until Mela's exposure-based riOiFIJ work starts.
Hioh”, and by the inverter lNg)
The transistor (BT3> is a light-emitting diode (
L D 1o) to (L D In) are enabled to emit light. The output of the digital camera (DEC1) is the output of the microcomputer (MC2).
The device (
MSE), (TSF), (△SF). (SEE), circuit (DSC), (1-△)
data between that device or circuit and the microcontroller (MC2).
Do you want to receive and pass data via tabus (DB)?
Give a signal indicating to the output terminals (aO) to (an+1)
. For example, if the microcomputer (MC2) has data in exposure control mode,
When reading data from the output port (OP+),
With constant data, the output terminal (aO) becomes "l-1-1i"
By setting the exposure control mode on the data bus (DB)
1 data indicating the setting exposure control mode from consent (MSE)
This data is output to the input/output button of the microcontroller (MC2).
Loaded from the start (Ilo>).Similarly, the set aperture value is
When reading, terminal (a2) is set to ``+-+ igh u.
Become. When sending display data to the display control circuit (DSC)
, one of the terminals (a4) to (an) is connected depending on the data to be sent.
It becomes “ll igl+”. In addition, the lens described later
When sending conversion coefficient data (K D ), input and output capo
-1- This change from (Ilo> to the data bus (D B )
After outputting the conversion coefficient data, specify the output port (OPI).
Outputs constant data for a certain period of time and connects terminal '(an+1)
The variation coefficient data is sent to the latch circuit (L△) by these pulses.
latches. The exposure control I device (EXC) is a microcontroller (MC2)
input signal type) 'Higl+°' interrupt to J terminal (it)
1. By setting HF3, the following exposure control is possible.
It is designed to start operating, and the release circuit and mirror
-Equipped with drive circuit, comparison IIJ control circuit, and exposure time control circuit.
It is growing. This device [(EXC) is a microcomputer (MC2)
When a pulse is output from the output terminal (04) of
Retrieves the number of refinement stages data output to the bus (DB).
Create a release circuit and start exposure control operation.
let A certain period of time has passed since the beginning of exposure control operation 17i'I.
After a while, the exposure time data from my 1st (MC2)
On the data bus (DB>, a pulse is output to terminal 05).
It will be done. This allows the exposure control device (EXC) to read the exposure time data.
and activate the mirror drive circuit to move it onto the reflecting mirror.
At the same time, the aperture control circuit is activated to reduce the aperture.
The aperture is narrowed down by the depth data. reflective mirror
As soon as the ascent is completed, the leading car starts running towards Shisetsuta.
Ru. At the same time, the count switch <C08) closes.
This activates the exposure time control circuit and causes the exposure time arc.
Counting of the corresponding time is started. Karan I- is complete
When the shutter is finished, the rear movement of the shutter (j is between 9 (1) and the aperture is
is opened and the mirror is lowered to perform exposure control operation.
Complete.゛The release switch (RLS) is pressed down on the release button.
This switch (RL S
') is opened, the output of the inverter (IN3) immediately
One input terminal of the AND circuit (AN 1) is L Hi
gl, it's going to be 11. The switch (EES) is an exposure control operation.
When the exposure is completed, it is opened and the exposure control mechanism (not shown) is activated.
It will be released when it is charged to a state where it can be used. This sui
The signal indicating the opening/closing status of the knob is sent to the inverter (IN4).
The input terminals of the microcontroller (MC2) <12) 13 and
Applied to the other input terminal of the AND circuit (AN+)
. In addition, the output terminal of the AND circuit (AN 1) is connected to the microcomputer (MC
2) is connected to the interrupt signal input terminal (it). subordinate
If it is exposed, the change in control mechanism has not been completed.
In the state, the gate of the AND circuit (AN 1) is closed.
Even if the release switch (RLS) is closed, the
The output of the second circuit (AN 1) is °“low !+”
It remains as it is. In other words, the microcontroller (MC2) receives an interrupt signal.
No input is made and the exposure control operation is not started.・On the other hand, Dew
When the output control mechanism is fully charged, the AND
The gate of the circuit (AN 1) is heard and the release
When the switch (RL S ) is closed, the AND circuit (A
The output of N1) becomes “Hi 11°” and an interrupt signal is generated.
is input to the interrupt terminal (i[) of the microcomputer (Me 2),
The microcomputer (MC2) immediately shifts to exposure control operation.
. Output terminal <01> of the microcomputer (MC2). (02) and (03) are microcontrollers (MCI), respectively.
) input terminals (i 11) , (i 12) ,
(i 13) is connected to I. Here, the output terminal (
01), the microcomputer (MCI) performs focus detection operation.
4"+-+ igh n if you want to do it,
output terminal (02) becomes 'Low'.
For focusing, rotate the motor <MO> clockwise.
An exchange configured so that the timing (F t-) is played out.
°' High ” if an interchangeable lens is attached.
, when the motor (MO> is rotated counterclockwise)
If the lens is an interchangeable lens, it will be 'LOW'. Output
Terminal (03) is used to detect the rapid deviation of the imaging position from the in-focus position and the
Combine the focus lens based on the focus direction.
A method in which the predictor is driven toward the focal position (hereinafter, the predictor
An interchangeable lens whose focus is adjusted only in response to
In the case of a lens, it is ``Low'', the deviation from the in-focus position.
Drives the lens with direction signals (front focus, rear focus, focus)
method (hereinafter referred to as the three-point indication method) and this predisposition method.
A) 1-J, ζ-point adjustment with one type
In the case of an interchangeable lens, t is "')-4ight". Sui
switch (FAS) is a manual off switch (not shown). ! l! To the shrine
-()A-
The focus lens is driven to the in-focus position and automatically adjusts the focus.
Section 7-1: (hereinafter referred to as FT Need)
), the camera is closed and the camera is focused according to the detection result of the focus state.
Status displayLtlfi trNaware, 1'a
i;! 4FtS is a manual 1j rope mode (below)
, [△ is called one do], then 1 is opened and 1 is created. child
During the swing i-(1:ΔS) of V! J1 signal I-f
Input to microcomputer (MC2) via Noveta ([N6)
Terminal (11) and input terminal (i
t4). Microcomputer (MCI) output terminal (QIG) t, inverter
The base of the transistor (f3T2) is
is connected to the ground (is therefore terminal <016) “
When it becomes "High", the transistor (13-r'2)
Continuity and power-on 1 noset circuit (PO2), burnout detection
Output light receiver (FLM), light receiver dust control circuit (GOT),
Motor drive circuit (MDR), encoder (ENC),
Power line to light emitting diode drive circuit (FA, D)
Power supply is started via (VF). This power supply starts.
Power A circuit (PoR2)
The output signal <PO2) is output. The light emitting diode drive circuit ([△D), for example, has a hob-like circuit configuration as shown in the figure.
The output port (OPO,) of MCI>, that is, the output terminal (0
17), (01B7, output from (019))
The light emitting diodes (1-DO>.
017), (018), (019)
If one terminal becomes '+-t tuh', the previous bin table
Indicator light emitting diode (IDO), focus indicator light emitting diode
LED <LD 1), rear pin display light emitting diode (14
) 2) lights up when the front focus or focus is on.
shows the violation. In addition, the output terminal (017>,
When the two stars of (019) become ゛HiOh u, the oscillation time
Based on the clock pulse (CP) from the path (C8D)
Light emitting diode (LDO) and (LD 2) are the same
It blinks at times to indicate that focus cannot be detected. Table 1 shows the operation
Indicate the condition. Table 1 Focus detection light receiving section (FLM) has multiple focus detection
CCD (Cbarge Q ou
pled[)eVico). control four
The circuit (COT) is exposed to the signal from the microcomputer (MCI).
C:, C', D (F IM) (1) m, CC
D output (D A-D conversion j @ 63 and A-D conversion output
It has a transmission function to the microcontroller (MCI). In addition, from the microcomputer (MCI> to the control circuit (COT)
T, output 1 child (010) or 13ccD (FLY)
A pulse signal to avoid starting the integral operation is sent to the output terminal (
011) to forcefully stop this integral operation.
Each pulse signal is output. In addition, the control circuit (COT) for microcontroller <MCI)
Therefore, the integral operation at C0D(Fl, M) has been completed.
A signal indicating this is sent to the interrupt terminal (it). The accumulated charge of each photodetector of COD (FLY)
A signal indicating that the A-D conversion operation has been completed is sent to the input terminal (
ilO), the converted data in A-1) above is input to the input board.
(IPO) respectively. Furthermore, the control circuit (COT) for COD (FLM>
From reset l-(jj is sent to terminal (φR), transfer command is sent.
The signal is connected to the terminal (φT), and the transfer clock is connected to the terminal (φ1
), (φ2), and (φ3), reference @ potential is connected to the terminal (ANB>
The control circuit is connected to C0D (FLY).
(COT), from the terminal (ANB) to the monitor receiver.
The potential depending on whether the light part receives light is applied from the terminal (AOT) to each receiver.
The specific circuit configuration of the storage in the optical section (COT) is explained in the section below.
This is explained in detail in the figure. At the COD (FLY), control circuit (COT),
To explain the operation of the icon <MCI), the control circuit (CO
T) is the output terminal (010) of the microcomputer (MCI>)
In response to the integration start signal from
Send a set signal to reset C0D (FLY)
At the same time, the reference potential signal is sent to the CCD (Fl, M).
give. The amount of light received by each light receiving part in C0D (FLY)
According to
The potential output from NB) is decreasing. The control circuit (COT') has a terminal (ANB) level of
When a predetermined value is reached, a command signal is transferred to COD (FLM).
Outputs the accumulated fM charge of each light receiving part of C0D (FLY).
If you transfer it to the Megate (transfer within COD (Fl-M))
Also, the integration is completed at the interrupt terminal (:t) of the microcomputer (MCI).
Give a completion signal. And the control circuit (G O-r) is
, the stored voltage transferred to the transfer gate of COD (Fl-M)
Receives the load based on the transfer clocks of φ1, φ2, and φ3.
A-1) Convert the accumulated charge by one light receiving part to
11] Input Me 1 every time the transformation is completed.
An A-DfL conversion completion signal is given to the output terminal (ilo). Ma
The icon (MC1) performs A-D conversion in response to this signal.
The input data is taken in from input ports 1 to (IPO). Then, the microcomputer (MCI) receives the CCI) (FLM).
When A-D converted data is imported for the number of optical elements, C
Finish importing the CD output. Note that the microcomputer (MCI) will be activated after a certain period of time has passed since the beginning of the reconnaissance investigation.
If no interrupt signal is input even after the
A microcomputer (M
CI) is output from the terminal (011). Control circuit (CO
T) responds to this pulse and issues a transfer command from the terminal (φT).
In addition to giving the signal to the COD, it also sends the signal to the microcontroller (MCI).
outputting an interrupt signal and performing eight-way conversion of the CCD output as described above;
Performs data transfer operations. The motor drive circuit (MDR) is the output of the microcomputer (MCI).
Given from force terminals (012), (013), (014)
Based on the signal sent to the motor (MO) t-driveTIh
? 1 le. In addition, ” / Imlin (MG 1) (7
) When the output terminal (012) is 'High', the motor (
M O) is in one direction from time, and the output terminal (013) is = 1
(igl, l+ throat motor (MO) is counterclockwise
The output terminals (012) and (013) are driven by
When I+ is low, the motor (MO) is not driven.
will be stopped. Furthermore, the output terminal of the microcomputer (MCI) (
014) is 'HiOh' The throat motor (MO) is high speed
A specific example of this motor control circuit (MDR) is described in the present application.
Someone has already proposed it in Special No. 8fi 1983-136772.
However, since it is unrelated to the gist of the present invention, the explanation will be omitted.
8. The encoder (ENC) is the motor (MO) rotation 1-
Transmission m on the camera body side to transmit the light to the lens
M (1-M D ) driving finger, for example, with a photocoupler
The number of pulses proportional to the drive M is monitored by the
Outputs the file. This pulse is the clock of the microcomputer (MCI).
is input to the clock input terminal (DCL) and counted as automatic fishing.
The count value is used for counter interrupt. Also
, this pulse is sent to the motor drive circuit (MDR)
, depending on the number of pulses (rotational speed of motor (MO) 1 (
is a flowchart 1- showing control. Microcomputer (MC)
The operations in 2) can be roughly divided into the following three 7 [1-]
Ru. The flow starts from step #1, when the power switch is
The main flow that is opened 1 (1) by opening (MAS)
and the photometry switch (MES) is closed (#2)
By doing so, the circuit section other than the circuit section for focus adjustment may be
Salary N171! (#4), and the settings on the camera body (BD).
Read the set exposure control information (#5),
), reading data from converter (GV) (#6~
#12), Reading photometric values (#13.14), A F
T-need, automatic setting of FA mode (#16 to #27),
Exposure control value display (#2B> and display (#31. #
32), etc., are repeated. Start with step #45
The flow is a timer built into My 21 (Me 2).
Photometry is performed using a timer signal periodically output from
Even if the switch (M [S)
15 seconds) is to perform the operation of the main flow above.
The term (mar interrupt) 1'-. Also, #59
The release switch (RL) starts with the step.
With the development of the camera's exposure control operation controller (M
Detailed explanation of the operation of the camera system in Figure 2 related to C2)
Rir. First, when the power switch (MAS) is opened, the power
On-reset circuit (PORI) Karari set signal (1)
01) is output. This relet signal (F-)01)
Therefore, the microcontroller (MC2)
Perform the relet operation in step #1. Photometric switch
(MES) is closed), step #2
The input terminal (10) has become 'High' on the
Once determined, tie)' - disable interrupts #3),
Connect the terminal (OO) to 'l-1ioh'(#4). This makes the transistor (BT1) conductive and the power supply voltage is turned on.
Power supply from the input (VB) is started. At the same time, the buff
converter from the power line (VL) via the filter (BF)
(CV) and interchangeable lens (LE) are started.
Ru. In step #5, the exposure control mode setting device (M
SE), exposure time setting device (TSE), aperture value setting device
(ΔSE), film setting equipment fiff (SSE)?
The data is sent to the input/output board via the data bus (D'B).
(Ilo). In steps #6 to #12, first write data to register A.
The data is set to “0” (#6), and the terminal (06) is set to “tr”.
1, converter circuit (CVC), lens
The reset 1 to state of the zoom circuit (LEG) is canceled and (#
7-1) , γ-Y series manual command is output (#
7-2). Converter circuit (CVC), lens circuit
When one data entry is completed from (1,,E C)
(#8), the captured data becomes the contents of the register.
It is set in the corresponding register M(Δ) (#9). next
, “1” is added to the contents of register △ (#10), and
It is determined whether the content of is AC (constant 1 "]).
It will be done. Here, if (A)≠AC, return to step #7-2.
Then, the next data is taken in again. When (A)=Ac, lens (LE) and converter
This means that the data import from (CV) has been completed.
Then, set the output terminal (06) to 'low' and set it to T'(#1
2), converter circuit (CVC), lens circuit (L,
Reset E C). Here, lens ('l-E) and converter (GV)
The data input section accepts, for example, 8-bit serial data.
8 glue O pins from the output terminal (SCO)
output the clock pulse, and input it at the falling edge of this clock pulse.
Read serial data sequentially. That is, the serial data input instruction (SIIN)
P70 Tsubu (FF1) is rets 1~ and barred to 3 pits 1
The reset state of the initial counter (Co 1) is released.
be done. At the same time, the gate of the AND circuit (AN 7)
A clock that is opened and divided within the microcontroller (MC2)
Pulse (DP) is output terminal as Otsu output for same 11.
(SGO) to converter (CV) and lens (L[)
The signal is sent to the circuit (CVC) and (LEC). Also, this
The loss pulse is generated by a counter (COl), a shift register (
SRt) clock input terminal. Shift register (SR1) beam [1 pulse (OP)
At the falling edge of the microcontroller (MC2) input terminal (SD
The data entered in I) will be imported one by one. here
, the carry terminal (CY) of the counter (Co 1) is 8
From the time when the th clock pulse (DP) is input, the next
Period until cross pulse (DP) is input” Hi9
On the other hand, the AND circuit (8N 5)
This carry output is on one input, and the carry output is on the other input.
The clock pulse (D
P) is input, so the AND circuit (AN 5) is 8
At the falling edge of the second pulse (DP)
isuh 11 what, flip 70 knob (F[1)
to reset 1, and the counter (Co 1) is also reset.
state. Therefore, the output of the AND circuit (AN 5) is also
The carry terminal (CY) of the counter (CO1) is 1. ．．
By becoming owlT, l-OWu roars and prepares for the next operation.
I can do it. This AND circuit ('1・lig from AN 5>
The serial input flag 5IFL is set by the pulse of “h”.
Completion of data input is determined, and the microcontroller (MC2)
from the foot register (SR1) to the internal data bus (IDB)
Store the data output to the specified register M(Δ).
pay. In Figure 6, the left side from the single point @ line is the converter (CV
) is the converter circuit (CV C), and the right side is the lens.
(LE) lens circuit (LEC). Microcomputer (M
C2) output terminal (06) becomes °“l-1ioh”.
and counter (CO3). (Ni05), (Co 7), (Co 9)
The reset state of the counters is released and these counters are
The clock given from the output terminal (SGO) of (MC2)
It becomes possible to count pulses (DP). 3
Pitt's binocular counter (Co 3), <
Co 7) detects the rising edge of this clock pulse (DP).
Count and start the next clock pulse from the rising edge of the 8th clock pulse.
The carry is held until the rising edge of the clock pulse (DP).
Set the terminal (CY) to l Hi, hll. 4 bits
Inary counter (Co 5), (Go 9) is
When the falling edge of this terminal (CY) is detected,
, , the rising edge of the first of 8 clock pulses
The counters (Co 5) and (Co 9) count each time.
1st shift increases by 1. t<-') circuit (CVC) (7) ROM (RO
1) is based on the callan t-im of the counter (Go 3).
The register is specified directly. Lens circuit (LE
C) ROM (RO3) is the counter (CO1).
Decoder (DE9), data selector based on the
(DS1) indirectly specifies that register.
Ru. From ROM (RO1) and (RO3) respectively
Output lens (LE), converter (CV)
The data does not correspond to the output of Aco1-da (DE5).
Either output is output by the series adder circuit (AL 1).
The output of the sum of the two processed
data is selectively output. Here, the focal length is fixed.
Counter (009) and deco for lenses that are
Table 2 shows the relationship between the reader (DE9) and ROM (RO3).
, represents the above relationship for a zoom lens with variable focal length.
Shown in 3. In addition, the converter has a +13 counter (C
o 5) and decoder (DE5) and ROM (RO1)
Table 4 shows the relationship with the output data to the camera body. still,
φ means that the data of each bit can be either °゛0'' or 1''
shows. (Left below) Table 2 Table 3 Table 4 Output (b) of counters (Go 3) and (Co 7)
O), (bl), (b2) are decoder (D
E3). (DE7) and a decoder (DE3). (DE7) transmits the signal shown in τ table 5 according to this person's kadek.
Output. (Left below) Table 5 Therefore, each time the clock pulse rises, the ROM (R
3) The data is one pit sequentially starting from the least significant bit (rO).
Each AND circuit (8N20) ~ (AN27), OR circuit
(OR5) and is output to ROM at the same timing.
(RO1) data is also
AND times one hit at a time starting from the lowest pitch I-(eO)
(AN10) to (AN17), OR circuit (OR1
) is output via. In the case of a zoom lens
is the focus set by operating the zoom ring (ZR).
Code that outputs 5-bit data according to distance #311
A board (FCD) is installed in the lens circuit (L, E C).
It is. A code plate (F
By the output of CD>, the data fileter (DS 1)
The value of the lower 5 bits of the input terminal (α2) is determined instantly.
Ru. Therefore, the data hefter (DS 1) is a decoder
The output (h4) of (Dr ball 9) is “j L, owll
In this case, “'0000 h3 from the input terminal (α 1)
h2 hl hO” data, ゛(Higl
, II, “h2 h1 from the input terminal (α2)
h0＊＊＊＊＊” (* is code board data)
By outputting, you can specify the address of ROM (RO3).
Set. If the output of the counter (CO9) is “oooo”, RO
M (RO3) address °'OOH” (g( is hexadecimal)
The address (indicating the number) has a check mark indicating that the lens is attached.
data is stored, and this data can be used for all types of
Data common to interchangeable lenses (e.g. 01010101
). At this time, the camera body (BD) and lens
An =I inverter (CV) is installed between the
If so, the output terminal (Q2) of the decoder (DE5) becomes Hi.
oh” is sent from the lens (L, E)
The data “' 01010101” is an AND circuit (ΔN3
2>, via the OR circuit (OR3), and also the lens (series)
If [) is attached directly to the camera body (BD)
It is sent directly to the camera body and connected to the input terminal (SDI).
is read into the microcontroller (MC2). This check de
The data detects that an interchangeable lens is attached.
If the metering mode is open, the exposure control device (fE
Aperture control is performed with XC). On the other hand, interchangeable lenses
If it is determined that the
The mode is set to photometry (no comparison control is performed. The outputs of the counters (Co 5) and (Co 9) are '
0001”, the lens ROM (RO3) address is
The address "'0111" is specified and the ROM (RO3
) outputs open aperture value data AVO. J5,
A zoom lens whose effective aperture value changes depending on the set focal length #1.
In the case of a lens, the maximum aperture value at a focal length of m is output.
Ru. Also, the ROM (RO1) of the converter (CV)
Address “1H” has a recorder installed with a converter (CV).
The constant value data β corresponding to the amount of change in the open aperture value of the lens is
The constant value data is stored in the ROM (RO1).
The data β is output. Decoder (DE5) terminal (9o)
"Ht(7h") NiJl:su, ROM (RO1
), (RO3) data is sent to the series adder circuit (Δ
L 1) is added and (A VO + β) is extracted,
This data is used for the ant circuit (AN30) and the off circuit (O
T is output via R3). Counter (Go 5),
Output power of (CO9) “0010” Ninaruto, ROM
(RO3). (RO1) is specified by the address “'02H” respectively.
be done. Minimum aperture from lens ROM (RO3)
Data A vmax and converter ROM (RO1)
Similarly to the case of the hk aperture value, using the data β from
, A vmax+β data is not installed again.
In this case, data of A vn+ax is output. The outputs of counters (Co5) and (CO9) are “o”
oii'M, : naruto, shi>) <(1) r'<OM (
RO3) address “03H” is specified, and the ROM
(RO3) outputs open photometry error data. child
Now, if the converter is not installed, this data
is loaded directly into the camera body. On the other hand, converter
If the CV is installed, the decoration will be displayed as shown in Table 4.
All outputs of the controller (DE5) are “' low” and the output is
The output of the circuit (OR3) is independent of the data from the lens.
'lo+v' will remain in the display, and the camera will not open it.
Read the data of O'' as the radiation measurement error. This is =
1 By installing an inverter (CV), the open aperture can be increased.
When the aperture is relatively small and the aperture metering error is '0'°,
Because you can think about it. Count (COr+), (Co 9) (7) Out
When the force becomes “0100”, ROM (RO1),
(RO3) has the address ``041-1'' respectively.
It is specified. Address of 1nons ROM (RO3)° “04 Tobi”
. The mode for extending the focusing lens ("L") is shown below.
Data showing the rotational force of the motor (MO) in 7 directions and this exchange record.
The lens has a model with an exchange coefficient that changes depending on the set shooting distance.
Data indicating whether it is a lens or not is stored.
. For example, rotating the motor clockwise will focus
41 at the bottom if the lens is of the type that is extended.
When the °I bit is “1°”, the motor is rotated counterclockwise.
This is a type of lens in which the focusing lens is extended when the
In this case, the least significant bit is 110 II. Also
, a type of lens whose conversion coefficient changes depending on the set shooting distance.
In the case of
In the case of the lens, the topmost pitch 1- is '0''.
. This data is independent of converter (CV) installation.
It is sent directly to the camera body. When the output of the counter (GO9) becomes “oioi”, the deco
For a lens with a fixed focal length, the output of the reader (DE9) is
'00101', for zoom lens '1001'
φ°°2, lens circuit (LEC) ROM (R
O3) is ``'05!-bi'or'' oo1*, respectively.
＊ ＊ ＊ ＊ ” address is specified. In addition, ゛
＊＊＊＊＊ 4: ” is the data from the code board (FCD)
It is ta. This address of ROM (RO3) is fixed.
In the case of a focal length lens, outside the fixed focus of that lens 1III
Corresponds to log 2 f of the logarithm value of l[ to the base 2
If the data is for a zoom lens, the zoom lens settings
Out of focus fl! Corresponding to the logarithm value log 2 f of l r
data is stored and this data is output to the camera body.
Powered. Also, the ROM (RO1) of =1 inverter is
Address '5H' is specified, and this address
To do this, replace the converter (CV) with the camera body ([3D)].
Changes when attached to an interchangeable lens (LE)
The change in focal length simply corresponds to the data γ that is stored.
. At this time, the output terminal (go) of the decoder (DE5) is '
)−l right”, so the addition circuit (A
-1 data 1 (1 (J 2
Add constant value data γ to f and Iζ data is sent to the camera body.
Sent. This focal length is used to determine the camera shake warning.
used for. When the output of the counter (Go 9) becomes "0110",
In the case of a zoom lens, from the digital camera (DE9)
Data of 1010φ'' is output and the terminal (h4) is
Since the 111th II, the data collector (DS
Data from the input terminal α2 of 1) is output. to this
Therefore, ROM ('RO3) is "010* * *
*:l: ” address is specified.
changes the focus n1 of the zoom lens from the shortest focal length
Aperture 1 from the effective aperture value at the shortest focal length when
γ-ta ΔAV of white change is memorized according to the set focal length.
It is. In addition, in the case of a lens with # outside the fixed focal point, Δ△
v = Q, address "06H" has "OII"
data is stored. This data is converted to
(CV) is attached to the camera body as is, regardless of whether it is attached or not.
I will be sent. In addition, this data is open 65! i! ! ll
A cast (Bv) for removing aperture components from optical data.
-Avo -ΔAV) -AVO-ΔAY and setting or 9
Operation iAv for controlling the effective diaphragm based on the diaphragm aperture
-ΔvO-ΔAV. When the output of the counter (CO9) becomes “0111”, the
In the case of a multi-lens, the output of the decoder (DE9> is “1oi”)
iφ", and ROM (RO3) is '"011 *
:l: ** * ” address is specified. This address
The dress contains conversion coefficient data K corresponding to the set focal length.
D is memorized. Also, fixed focal length lenses
In this case, the ROM (RO3) has the address “0711”
specified, and fixed conversion coefficient data K is stored at this address.
D is memorized. Compensate for changes in conversion coefficients
A converter with a built-in mechanical transmission mechanism is installed.
If it is, this data is transmitted to the body as is.
. This conversion coefficient data KD is processed by a microcomputer (MCI).
Calculated differential focus amount 1ΔL1 to 1ΔLIXKD
The motor drive mechanism (1-M l))
It is used to drive single data. . In addition, the conversion coefficient data is, for example, 8-bit data.
, the upper 4 bits of the exponent and the lower 4 bits of the significant digits
It is divided into sections and code numbered as shown in Table 6.
. Table 6 KD=(k3・2 2・2 in 1,000 1・2−2 in 1,000 + bo
・2) ・2 ・21 R1=4・2 +5・2 +6・22+7・2
J is determined by the performance of a constant value (for example, -7). Furthermore, k3 is the it-place bit of the significant figure part.
It is always 1111+. Therefore, this
If such coding is performed, the value of KD can be within a considerably wide range.
It is easy to use W4 in the microcomputer (MCI) even if the environment changes.
Can be memorized as a small number of pitches
. Figure ♀ shows the conversion coefficient data output from the zoom lens.
This is a graph showing the relationship between focal length and focal length, and the horizontal axis is lo
Corresponds to g 2 f, and the vertical axis corresponds to the conversion coefficient +<0
. By the way, KD is -C straight line according to focal length 11111 f
A. It changes continuously as shown in B and C, but in this example,
In this case, mA', B', C'''C As shown, K
The value of D is set to a discrete value of 1 to 33. Therefore, in the case of K 1-2, K D = "01111000"
, -1-2-3-4 If K2 = 2 + 2 + 2 + 2 then KD =
“'01101111”, K 3-2-1-2-1-2
In the case of KD-''01101110'', K4=2+24
-2, K D = “01101101”, K 3
1 = 2-'+'; In case of i', KD-' ooio
32=2+2 in 4-7, KD="00111001", K
When 33=2, KD='“ooioioooo°’.
ing. The focal length of the zoom lens is 5 pins on the code board (FCD).
It is divided into many areas corresponding to the output of
For example, if it is a lens that changes to a straight line, f17 to f2
It is divided into 9 zones of 5. With this configuration, f2
If it is a zone of 5, the smallest 1 value of T' in that zone
110 small data closest to ] < 17, f24
If it is a zone of f23, it is 1G, and if it is a zone of f23, it is l(1!
If the zone is i, f22, the data 1 (13 will be output)
It will be done. The reason for determining the value of KD in this way is as follows.
Ru. That is, by making K O a larger ratio than the actual data,
Then, drive the lens for A-waste to the in-focus position l.
ENC coder (ENC) pulses that simply correspond to the drive required for
Number of spaces J: Calculated from Rimo N = K D X1ΔL1
N becomes larger, and as a result, the lens passes through the in-focus position.
The lens may be hunting before and after the focus position.
This is because it will happen. Therefore, by setting KD to a smaller value, J5
If N, the camera will gradually approach the focus position from one direction.
Also, the difference with the actual KD will be as small as possible.
The focus lens will reach the in-focus position.
You can shorten the time it takes. In addition, if the value of KD is always set to a small value, the actual KD
The difference between the value of
Sometimes things take too long, but you can reduce the time.
In order to reduce the
As shown, the area is slightly larger than the actual 116.
Slightly i: Set it up and go a little too far from the focus position
It may be possible to do so. In addition, even though the shooting distance is the bear limit, the solid line C (oQ), short distance
In this case, it is converted according to the shooting distance, as shown by the dashed-dotted line C (near).
There are zoom lenses whose coefficients vary significantly. This zoom
In the lens, for example, the shooting Pi is set in the focal length f1 zone.
When lt changes from the infinite position to the nearest position, K
[)=k17=2 changes to KD=゛2-4 and 15=2+2. A zoom lens like this
In this embodiment, in order to be able to deal with
Store only the conversion coefficient data in ROM (RO3).
, the area near the in-focus range (hereinafter referred to as the near-focus zone)
Until it reaches
The focus lens is driven only based on the signal from
, when entering the near focus zone, due to the above-mentioned KD and IΔL1.
1 nons is driven based on the value of N found as follows.
are doing. In addition to the focal length code board (FCD),
A separate ]-do board for setting prefecture shadow distances is provided, and these "-do boards
Specify the ROM (RO3) address to make exact changes.
Although it is possible to obtain conversion coefficient data, the number of parts
increase, number of bits for addressing, ROM capacity
However, it is not practical due to problems such as an increase in Additionally, move the zoom ring, for example, from the shortest focal length position.
Mac0@shadow can be achieved by moving the lens to the short focal length side.
There are zoom lenses that are configured to (This zoom
The mechanism of the lens is not related to the gist of this application, so it will not be discussed here.
The explanation will be omitted. ) For such a zoom lens,
In this embodiment, when switching to macro photography, the code board (F
data of “11111” is output from CD), and the specified
so that the address ""o1iii1ii" is specified.
It is. In the case of macro photography, the position of the @ diameter may change or the depth of focus may change.
The AF mode may become shallow or the aperture value may become dark.
Since it is difficult to adjust the focus by the address,
φφφφ0110” data is stored, and
3 is “°0”. The microcomputer (MC2) uses this data to
The switch (FAS) determines that the
AF mode is set.
automatically switches the focus adjustment mode to mode. Also, if you do not set the shooting nt in the closest position, the microphone
[Zoom configured so that switching to 1 shooting is not possible]
There's a lens. For lenses like this, go for macro photography.
The switch (MC8) in Figure 5 is closed by the switching operation.
, inverter (I N 17), inverter (I N
19) through the AND circuit (8N40) ~ (AN44
) output becomes 'LOW'.This causes
The address of ROM (RO3) is ``01100000''.
It is specified. This address has 1 “φφφφ0100” as KD.
The data is stored and the microcomputer (MCI)
゛-Evening 3 = k1 = Q allows Mac [cut to 1 shooting
It is determined that the replacement operation has been performed and the removal distance is automatically set to the maximum.
Rotate the motor (MO) so that it is in the contact position.
No need to manipulate the focusing lens. The light receiving part for focus detection is the fixed exit pupil where the photographing lens is located.
The diameter of this pupil and the light receiving element (field)
(has been revised to a position optically equivalent to the lume surface)
from the subject that passes through the photographic lens depending on the position of the pupil.
It is determined whether the light receiving element receives the light. Therefore,
The lens may be damaged (so that light does not enter some of the light receiving areas).
There are some things. Focus detection is not performed with such lenses.
However, it is unreliable even if the mode is
It is preferable not to perform any action. Therefore, a lens like this
ROM (RO3) address (zoom
For lenses, set “01 to l: :l: 1: **”, fixed.
For focal length lenses, “ooooooiil”) and “φφ
Store the data of “φφ0001” as KD.
Icon (MC2) uses this data to create #16, which will be described later.
In step -2, the microcomputer (MCI) switches to ΔF mode.
to avoid performing focus detection operation in FA mode.
Ru. In addition, by macro switching, AND circuits (△N40) to (A
N44) to “ooooo” or 6°11111”
If data is output, the ROM (RO3) address
Response “00100000”, “00111111”
” contains data corresponding to the focal length @r during macro photography,
Address “olooooooP, 01011111
'' stores data corresponding to ΔAV during macro photography.
are output from the ROM (RO3).
Ru. Also, the rotation of the drive shaft in the camera body is transmitted to the focus adjustment member.
For interchangeable lenses that do not have a mechanism to reach
Similarly to switching to B prefecture shadow, KD and “φφφφ0110
''' is memorized and only FA mode is possible.
. Furthermore, like the lenses mentioned above, it does not have a transmission mechanism.
In the case of a converter, the NOJ counter (CO2) (7) output
When the force is '0111'' 2139, ROM (ROI
) outputs "φφφφ0110"' and decodes it.
Only the terminal (gl) of the terminal (DE5) is
” ROM (RO1) Car data to camera
What kind of interchangeable lenses can be used if the transmission is transmitted to the main body?
Even if it is installed, it will only operate in FA mode. Insert a converter between the camera body and the interchangeable lens Jl
rThe focal length changes depending on the successive platform and converter.
In response to this increase, only the darkness is driven from the camera body.
A deceleration mechanism is installed inside the converter to reduce the amount of rotation of the shaft.
It is necessary to In other words, the amount of rotation of the drive shaft of the camera body is
This is the mechanism that transmits the signal to the drive shaft of the focusing lens.
If the converter is equipped with
Transmitted to the camera body and only N=KDX lΔL1 is transmitted to the camera
When the drive shaft of the main body is rotated less, the amount of out-of-focus -1 increases.
There are problems such as the camera not responding properly or moving away from the focus position.
be. Therefore, converters that are not equipped with the above-mentioned reduction gear II structure
In this example, for example, the focal length is increased by 1.4 times.
If you are looking for a converter that can convert KD to 1/2
If the KD is 1/4, the upper KD of each
From the 4-bit exponent data (k7 to 6 to 5 to 4)
, for a 1.4x converter, subtract 1 and get a 2x converter.
If it is ta, I try to subtract 2. Returning to Figure 5, the output of the counter (Co 5) is '10'.
00”, the converter circuit (C
VC) ROM (ROI) to converter (CV)
"'01010101" indicating that the
Check data is output. At this time, the terminal (gl) of the decoder (DE5) is t-1
This check data will not be recorded.
Data from ROM (RO3) of lens circuit (LEC)
AND circuit (AN31) regardless of. Sent to the camera body (BD) via the OR circuit (OR3)
It will be done. The output of the counter (Go !i) becomes ``1001''
This is due to the fact that the luminous flux is limited by the converter.
The aperture value data Avl determined based on the vignetting of light is R
Output from OM (RO1) and output in the same manner as above.
The “C” circuit is connected via the C circuit (AN31) and OR circuit (OR3)
Sent to Mera itself. This data Δv1 is the microcomputer (
M, C2) is compared with the open aperture data AVO+β.
Ru. When AVO+B<AVI, the photometric output is [3v
-AVI, so (BV-AVI)+△v
l=3vJ5 and comparison stage number data AV - (AVO
+β) is calculated. As described above, the lens (LE) and the converter (
When the import of data from CV) is completed, the screen shown in Figure i.
In the flowchart, the output of the photometric circuit (LMC)
A-D conversion is performed (#13), and this A-D conversion
The photometric output data is stored in a predetermined register (
#13>. In step #15, the release flag RL F is “1°”.
', and if this flag is "1", #
Go directly to step 28, and if II O11, #
Easily change steps 16 to #26 to step #28
Transition. Here, the release flag RLF is the release flag RLF.
The switch (RLS) is closed and steps after #59
Camera exposure control value when interrupt operation is 1-1
d is a flag that is set to 1'° when the
Rir. Note that the exposure control value is not displayed during this interrupt operation.
If it is determined in step #63 that there is no
Perform the above data import operation in the following 5 steps,
If RLF=1 in step #15, steps after #16
Focus detection operation using AF and FA modes in step
Jump the flow and perform exposure calculation in step #28
After that, go through step #30 and step #64 onwards.
Exposure control is performed on the top. In step #16, switch to AF mode or FA mode.
A determination is made as to whether or not focus detection operation is possible.
, if possible, go to step #17, if not, go to step #17.
Move to step 28. In this step, the lens
is installed (#16-1>, exit pupil
Whether the conditions defined by the diameter and position are compatible with the light receiving part.
(916-2), is the subject visible to all light receiving sections for focus detection?
(#1G-3)
It is possible to determine whether the switch is closed or not (#1G-5).
It is done sequentially. Here, check data “01010101” is input.
If not (#16-1), the KD data is 3~
When kO is “0001''(#1G-2), the lens
The diameter of the exit pupil is too small and the aperture is opened wide (mAvo, AVO
+β, AVO-to △AV or △vl is a constant aperture value [Example
For example, 5 (F 5.6)] If larger than AVC (#
1G-3>, both have AF mode and FA mode.
Since the focus detection operation is impossible, the ttlG-4 step
It is displayed that the focus detection operation is not performed at step
After the warning is displayed on the control circuit (DSC), step #28
Move to step. Also, the photometry switch (YES) is open.
If it is released and (io) is low (# 1[1-
5) 1: Operate only in A mode for 15 seconds.
In order to do this, move on to step #28. Input check data, k3~kO≠゛0001'', A
VO, AVO+β, AVO+AV or △v1≦△vc
. If both “'High” in (10) are determined,
Proceed to step #17 and subsequent steps. In step #17, the output terminal (01) is 11 Hi
, l, becomes IT, and microcontroller (MCI> is its input terminal)
F, FA by ill's j Hi gi IT
Starts focus detection operation depending on the mode. Step #18
The conversion coefficient data read into the microcontroller (MC2) is
'D' to the data bus from the input/output port (Ilo).
to cause the latch circuit (LA) to latch. This rack
The data latched by the circuit (LA) is sent to the microcomputer (M
CI) is read in step N 0093 described below. In step #19, the output of the - counter (Co 9)
Based on the data read when is “0100”,
The conversion coefficient KD of the attached lens changes depending on the shooting distance.
Determine whether the lens is a changing model. Here, something strange
If the lens is a lens that converts into
03) In other words, the input terminal (i13) of the microcomputer (MCI)
l +1ight If the lens does not change to T-, “
= c Set to 0W11. The microcomputer (MCI) is based on this belief.
Depending on the number, the detailed fence is No. 192 or No. 1, which will be described later.
As described in step 97, the imaging position is within the near focus zone.
or whether the integration time is longer than a certain value.
Switch the motor (MO) drive in AF mode accordingly.
Ru. Similarly, in step #22, the counter (Co9) is "'
0100” based on the data read.
How to rotate the motor (MO) when feeding and covering the lens for scraps
Determine the direction. Here, if the direction is clockwise, the microcontroller (M
C2) output terminal (02), that is, the mini-input (MCI)
Set the input terminal (i12) to '+-+ igh u,
If it is in one direction, set it to “L 0WIT.
I) is the (No. 8 and defocus method) to this terminal (i12).
The direction of rotation of the heptad (MO) is determined by the direction signal. In step #25, the third of the conversion coefficient data KD is
By having humans detect whether 3 is "1" or '0°2
, A with attached converter (CV) and lens (LE)
Determine whether focus adjustment operation using F mode is possible
. In this case, k3-1 allows F mode, so F mode is possible.
Set the lag MFF to 1101+ and move to step #28.
do. On the other hand, if k3=0, AF mode is not possible, so M
Set the FF to 1'', then turn the switch (FAS) to ΔF.
Or check if any mode of FA is selected.
I know. Here, the AF mode is selected and the input terminal
If (11) is ``Hi, l, 11, then the photographer
automatically switches to FA mode even if ΔF mode is set.
The display control circuit (DSC) warns that the switch is being made.
Change the notification display to step #28. If the input terminal (11) is 'low', the FA mode is
Since it is originally selected, continue with step #28.
to move to. In step #28, in steps #5 to #14
Loaded set exposure control values, metering values, and data from the lens
The exposure time and aperture are determined based on the exposure time and aperture.
Extract the value data and set the flag LMF to 1". In step #30, check whether the release flag RLF is "1" or not.
If it is ``1'', proceed to steps after #64.
Return to the flow of the exposure control operation and select #3 when
Move to step 1. In step #31, the output terminal
To make 'l-1ioh' through child (08)
Inverter (IN8) and transistor (BT3)
conduction, and the light emitting diodes (L D 10) to (L
Warning display by D in) and liquid crystal display (DSP)
J: Displays the exposure control tlDm. In step #33, the photometry switch (YES) is opened/closed.
Determine the condition. Here, the photometric switch (MES) was developed.
is set and (10) is 'lligh', the timer
- Timer data for 15 seconds count for interrupt
#34) and start the timer.
(#35) and enable timer interrupt (936).
Then return to step #2. In this case, (10) becomes
“= High 11 (photometering switch (MES) closed)
), so immediately move to step #3.
Disable timer interrupts and repeat the same operation as above
. On the other hand, the photometry switch (MES) is open.
o) “Low” switch (FAs)
) selects either AF or FA mode.
(#37), and based on the data from the lens
The mode determined in step #25 is determined (#3
8) To be done. Here, the input horn terminal (11) is ' lo
Check whether FA mode is selected (#37) with w” or
Even if the AF mode is selected, the flag MFF is 111.
II, the lens side can only operate at FA'f needle.
If not, proceed to step #40. AF mode
is selected and MFF is “Ot+”, the output terminal
Set <ol) to “LOW” (#39) and turn on the microcomputer (
After stopping the operation of MCI>, proceed to step #40.
go In addition, #37. FA mode in step #38
is determined, the terminal (01) G, t “High
h” (Move to D Mate#4o step, Miko
(MCI) operation continues. In step #40, the open/close status of the switch (EES) is checked.
It is determined that the exposure control Ij118 has been charged and the C and
If (12) is '@igl+', then #41
Go to step 1 and perform the operation to return to the initial state.
Let's do it. The exposure control mechanism has been fully charged (12
) is 'low', then #3G+7) )
, after enabling timer interrupts in step #2.
(return, the metering switch (YES) is opened again.
The input terminal (:0) becomes ``Hi, l, II, or
It has a timer interrupt. Now, when there is a timer interrupt, 1 is generated from the contents of register Tc.
Has been subtracted (#45) and the content of Tc has become 0''?
It is determined whether or not (#46). If Tc≠0, #5
Move on to the subsequent steps to import and expose the aforementioned data.
Perform movements such as numbness. At this time, if in FA mode,
The terminal (ol) is “Hioh” l:; Note microcomputer (
MCI) repeats the operation for FA, even if it is in AF mode.
In step #39, terminal (01) becomes LOW It.
The microcomputer (MCI) has stopped operating because
Ru. On the other hand, when l'-c=0, the output terminal (00). (01) and (08) are set to ``LOW'' and the
Power supply by resistor (BT 1) and buffer (BF)
operation of the microcomputer (MCI) in FA mode.
The power supply is stopped by the transistor (BT3>).
be exposed. Furthermore, the blank display on the liquid crystal display (DSP)
, flag MFF. After resetting the LMF, return to step #2
. To summarize the above operation, the photometry switch (MES) is closed.
While data is being created, the microcomputer (MCI)
> operation and the operation of displaying the exposure quality 9 are repeated. Next, when the photometry switch (MES) is opened, the AF mode
When the code is off, the microcontroller (MCI) stops operating immediately.
It takes 15 seconds to import the data and display the exposure calculation as 0.
When in FA mode, data acquisition and mapping are repeated.
FA operation and exposure calculation using icon (MCI). The display action is repeated for 15 seconds. In addition, the exposure control mechanism
If charging is not completed, press the metering switch (M
ES) is released and the data is imported. My-1 (M'CI) operation, exposure calculation 1 display operation
Stop immediately. In addition, once #16-4. #27-2 Step alert
Even if a warning is issued, there is no need to issue a warning at the next flow point.
If so, please provide the data to cancel this warning.
Yes, it is necessary to communicate to the display control circuit (DSC)
It's no good. Next, release the camera after the exposure control mechanism has been fully charged.
Explain the operation when the switch (RLS) is closed
. In this case, what kind of operation does the microcomputer (MC2) perform?
Even if the
performs a number of movements. First, an interrupt occurs while reading data from the lens.
Considering the case, set the terminal (06) to l L oll.
converter and lens circuit (CVC). (LEC) to reset state #59), terminal (01
) to =゛L0W11, and the microcomputer (MCI)
Stop the operation of 8F or FA mode (9fiO)
. Furthermore, output terminal (08) is set to I-owll for warning.
Turn off the light emitting diodes (LD10) to (LDIn).
Let's light T (#"61), Shi! J-Sufu 7g RLF
1'' is set (#62) L, and then the aforementioned flag LM is set.
It is determined whether F is ``1''(#63). Here, if the flag LMF is "1", the exposure control value is calculated.
Since the output has been completed, the process moves to step #64. one
On the other hand, if the LMF is '0', the calculation of the exposure control value is completed.
Since you have not done so, move on to steps after #5 and control the exposure.
The value is calculated and the process moves to step #64. In step #64, the value calculated in step #28 is
The data of the number of refinement stages AV -AVO, AV - (A
VO+ΔAV), Δv-(ΔvO+β), AV-
(A VO + β + ΔAv) is output to data bus < DB)
The pulse for data acquisition is output from the output terminal (04).
It is output (#65). With this, the exposure control device!
When the data of the number of narrowing stages is imported to (EXC) and the number is counted,
In both cases, exposure control am's narrowing down operation is started, and the
When the aperture is narrowed down by the number of stops specified, the aperture is narrowed down.
The operation is complete. A certain amount of time has passed since the pulse output from the output terminal (O4)
Zuruto (#6 (i), calculated exposure time data 1
v is output to the data bus (DB>), and the output terminal (05)
A pulse for data acquisition is output from (#67, 4
t68). This pulse is called J: by the exposure control device (EXC).
), the exposure time data is captured and the built-in
One mirror operation is started by the mirror drive circuit that has been installed.
Ru. When the mirror up is completed, the shutter front curtain will start moving.
starts, and the count switch (CO8”) starts.
The time counter corresponding to the exposure time data captured by closing the
mount starts. After the count ends, the shutter
Curtain travel has started and mF3 travel has been completed. By lowering the mirror and opening the aperture, the switch (EES
) is rr+IC″rJ. The microcomputer (MC2) is closed when this switch (EES) is
Then the input terminal (12) becomes “l Hi, l, II.
When the release flag (RL) is determined (#69),
F) (970) and 1 light switch (MES).
) is m or the input terminal (10) is
(#71) @Here, (10) is °
'l-11g11'', proceed to steps after #2.
Return, data import mentioned above, microcontroller (MCI) operation
, repeat the operation of n appearance fraud 9 display. On the other hand, #71's stage
If the photometry switch (MES) is open at the top and the input terminal
If the child (10) is 111 os-T, the steps after #47
program and reset the microcontroller (MC2) to its initial state.
Flowchart 1- shows the operations from #1 to #2. Ma
The operation of the icon (MCI) can be roughly divided into the following three flows.
be done. The program that starts with step N011 is a microcontroller (M
The main frame is started by the focusing operation command from C2).
COD (F
LM) operation start (No. 8), determination of whether the motor is rotating or not.
Separate (No, 10 to No, 13), best integration time of COD
Operation when the longest integration time elapses (No. 14)
~19), Detection of the end position of the focusing lens 7Jl
Timing of longest integration time (No. 35 to 44), end position
Stopping the motor at low contrast and restarting rotation at low contrast
(NO, 43-48.51-67), Microcomputer (MC
I) initial settings when the operation is stopped (No, 25 to 33),
Lowll! Conversion of COD data at mark time (N 0978-8
0), calculation of defocus amount and defocus direction (
N0181-91), lenses that can operate in AF mode
(N 0092-96), contrast
Focusing by MA11 (NO, 100>, ΔF mode)
Operation during zone (N 00105-115, 205-2
14) You can switch to macro photography at the most recent concubine shooting position.
Motor drive in the case of a capable lens (NO, 220-23
2) etc. are performed. No, steps 70 to 7G are control times ff1 (COT
) to the terminal (it) by the COD integration completion signal.
This is the flow of a short cut. Also, N 062 in Figure '8
Steps 00 to 204 are processed through 1 encoder (ENC).
By outputting a match signal from the counter FCC,
This is a flowchart of a counter interrupt in which focus is determined. still
, once the pin interrupt is enabled, the counter
Even if an interrupt signal is generated, it will not be generated until after the terminal interrupt operation has finished.
Both interrupts are
Priority order of operations is determined. This flowch below
AF in a3 in this example based on the chart. The operation of FA mode will be explained. First, in response to the opening of the power switch (MΔS), the power
Reset signal (PO
1) is output, and this reset signal causes the microcomputer (MCI
) performs a reset operation (No, 1) from a specific address
. No, the switch (FAS) is closed in step 2.
and the input terminal (i14) becomes "l-1ight".
Determine whether there are any. Here, (i14) = H
igl, if it is 11, the AF mode is selected.
Set the flag MOF to 1 “0” with “LOW”
If so, the Nogu flag MOF with FA mode selected.
Set '1''. N At step C05, the output of the microcomputer (MC2)
The terminal (01) is I Higl, II, that is, the input horn terminal (
ill) is “l-1ioh”.
Discrimination. Here, the input terminal (ill) is 'low
”, then No, return to step 2 and repeat the above steps.
1°. (ill) becomes 11 iQh u
is determined, the output terminal (016) is
hll (No, (1, via inverter (INS))
do!・Pass the power line through the transistor (BT2)
(VF) to start power supply. Next, C0D(F
L fvl ) in the register ITR for integration time n1.
Set fixed data C1 corresponding to the best integration time (N
o, 7). Next, from the 1 output terminal (010)
g1+” pulse (NO, +1) and control circuit.
The integration operation of COD (FLM) is started at (COT>).
1! , after enabling interrupts (No. 9), set No. 10.
Move to step. No, in steps 10 to 13 G, motor (
It is sequentially determined whether or not MO) is rotating. In other words, it is determined whether the first focus detection operation has been performed or not.
By flag jPF (No, 10), focus lens is set.
If the driving position of the lens (F L ) is the nearest or the end of infinity,
Whether or not the end position has been reached is determined by the end flag ENF (
No. 11), the driving position is within the focus zone.
Whether or not the focus flag I[[: (No, 12),
Which mode is selected by the switch (1”As)
Iruka is flagged by MOF (No, 13), respectively.
It is determined sequentially. At this point, check whether the first focus detection operation has been performed or not.
has reached its end position or is in the focus zone.
or if FA mode is selected, the motor
- (MO) has stopped rotating, so No. 14 onwards.
Move to step. In addition, the focus detection operation from the second time onwards
is being made, and the lens reaches the end position of the 9th focusing zone.
and AF mode is selected, the monitor
Since the motor (MO) is rotating, NO, after 35
Move to the next step. Furthermore, the flag FPF is the first
The period during which the focus detection operation is performed is ``゛1'''', twice.
During the subsequent operations, it becomes “0” and the end flag E N F
is the closest driving position n of the focus lens (FL)
Or, if the motor (MO) has reached the infinite position,
Even if the rotation is more than
When the is not output, it becomes "'bi'" and the focus flag IF
F means that when the lens enters the in-focus zone, it will be out of focus by 1°.
When it is, it becomes 0''. No. In the steps after 14, first,
“1” is subtracted from the contents of register ITR (N (1,
14>, Borrow 〇RW appears from this register ITR.
(No, 15). Here, if Borrow BRW does not appear, low brightness flag
I want to set II OII in LLF.No, 18>, My
From the controller (MC2) to the input terminal (+11), the microcontroller (M
l-(high” signal for operating CI> is input.
No, 19). If (ill) is “l-1igb” then No, 1
Return to step 4 and repeat this operation. Also, “L
ow”, No, move on to steps 25 and onwards.
After performing the operation to return to the initial state, step N082
Returning to the top, the input terminal (ill) is “’ 11 t
gh”.Meanwhile, No, 15 steps
When it is determined that a borrow BRW has been obtained, the integral of @ length
The time has elapsed, and a pulse is output to the output terminal (011).
Output (No, 16) L, , CC [J (FLM)
Forcibly stops the integration operation and sets the low brightness flag LLF.
Set it to "1" and connect the interrupt terminal (eye) from the control circuit (GOT).
It has an interrupt signal output. In the steps after No. 35, first, the time register
Data C2 is set in TWR for a certain period of time (No, 35>
, 17 from the contents of register ITR (for example, 3)
Determine whether BO0-BRW appears by subtracting
(NO, 37). Here, from the register ITR
-If BRW appears, the longest integration time is
Since the elapsed time has passed, move on to step 16.
to forcibly stop the integral operation of COD (Fl-M).
, the low luminance flag LLF is set to "°1'', and the control circuit (C
Interrupt No. 18 is input from the OT) to the interrupt terminal (it).
wait. Also, if Borrow BRW appears and the number is pulled, the low brightness flag will be flagged.
Set 1F to ``0'', register TWR to II 1
Subtract II [Check whether Borrow BRW is out or not]
Separately (N(1,40>.Nowadays, Bo1]-8RW is
If not, the input terminal (ill) is '= 1'i, l
, Check whether it is ++ or not in step 41.
Distinguish by (ill) becomes “Htgh”
If there is, l'Jo, return to the 3G step,'''l-ow
”, move to step 25. In addition, if C1y'n > C2, then N003
Until Borrow BRW comes out in step 7
, multiple borrows are determined in steps of N+1.40.
Out. No, if Borrow B RW comes out at step 40, E
Data that counts the number of pulses from encoder (ENC)
[Set CD to register [CD1, <NO, 42]
, compare this setting data with the contents of register ECR2.
(N 0043). In addition, register ECR2 has that
Previously captured count data is set. child
Here, register ECR1. If the contents of ECR2 do not match, the lens may have moved.
Therefore, record the contents of register [E CR1.
Set to register ECR2 (No, 44) and No, 35
Go back to step. No, register ECRI and ECR2 in step 43.
If the contents match, the previously captured encoder
The pulse count data from (ENC) is changing.
No, i.e. the lens moves to the nearest position or to infinity.
This means that the position has been reached. Therefore in this case
Interrupts are not possible (No, 45), ! l: Output end
Child (011) t,:z<Output Luz (No, 46) L
/TCCD ([LM) +7) Forces the integral operation to stop.
output terminal (012). (013) together “L OW” (No, 47>
to stop the rotation of the motor (MO) and set it to low
~ Determine whether flag LCF is “1” (
NO, 48). Note that this flag LCF is used when the subject is low
based on the output of C0D (FL, M).
The differential suspension and scrap suspension ΔL calculated using the
It becomes 1''. Here, if the flag and CF are 0''
In this case, set the termination flag ENF to ii 1 u (No,
49), proceeding to step No. 270 in Figure 10.
Ru. In the step of NO, 270, the input terminal (ii4
) remains as “l-l right”,
(ii4) is “light” and ΔF mode is selected.
If it stays the same, go to step 2.
. On the other hand, (ii4) becomes 'low' -)T and F
If it is switched to A 'E- mode, the flag F P
Set F to 1111+ and connect terminals (012) and (013
) Turn the motor (MO) to “low” and stop it.
, set flags LCF, LCF1, and LCF3 to 0''
Afterwards, return to step N082. To summarize the above operation, the input from the microcontroller (MC2)
The focus detection operation command starts the COD integration and divides the COD.
start counting the best integration time.
Ru. If the motor (MO) is not rotating at this time,
Interruption No. 18 is input while counting this R 艮 integral time.
If the interrupt signal is not input even after the best time has elapsed,
If not, the COD integration will be forcibly stopped.
Have a signal input. On the other hand, when opening the integral operation of COD,
If the motor (MO>) is rotating when you start it, the
Does the lens reach its end position while counting minutes?
It has an interrupt signal input while periodically determining whether
@Even if the long integral time elapses, the interrupt signal is not input and the record is
If the lens has not reached the end, the COD integration is forced.
It has an interrupt signal. Also, the lens reaches the end.
If so, interrupts are disabled and the integration is forcibly stopped.
then stop the rotation of the motor (MO) and turn on the COD again.
, and as described later, falsify ΔL and focus.
If there is a violation, the microcontroller (MC2)
High I+ to the input terminal (ill) of the controller (MCI)
Even if a signal is input, the microcomputer (MCI) does not perform focus detection.
This signal is
The photometry switch (MES) is closed and turned on again with w”
When the power terminal (ill) becomes “High”, N 0.2
Start operation from step. Now, at step N0048, flag I-CF is 1''
If it is determined that 7-lag LCFI is
It is determined whether the angle is 1°° (No, 51). here,
If LCF is ``0'', set LCF 1 to ``°1''.
(No, 52), No, 60 steps to change the focus direction.
Determine whether lag FDF is "1". In addition, the flag
In LCF1, the lens position is significantly off from the focus position.
A computer is used to determine whether or not you are in a so-called stupid state.
In order to scan the lens position where the trust exceeds a predetermined value,
flag, flag FI) r: is a lens with ΔL>O
When renormalizing (front bin), “I 1++, Δl−<
When extending the lens with O (rear focus), the flag becomes '0''.
It is At this time, if FDF is 1゛', it becomes °0'',
°', it is reset to "1", and each input terminal (i
12) is “Hiql+” is determined (N
o, 63.64). In other words, determine the rotation direction of the motor to extend the lens.
Then, No, in step G3, (i12) becomes 1-11-1
If it is 1°', it must be rotated clockwise to prevent the lens from extending.
No, move to step 66.
and set the terminal (012) to 'High'. Set the terminal (013) to 'Low'. (112) is”
l, ow”, in order to extend the lens, [-tar(
MO) must be rotated counterclockwise, so Gj must be rotated counterclockwise.
, No. Go to step 65 and connect the terminal (012) to “
low", (Q 13) 'l-1igl+
”. Also, in step No. 64 (i12)
If it is ゛'to1ight+, turn counterclockwise to retract the lens.
The motor (MO) must be rotated in the direction
Q No, move on to step 65. (i12)
If is "'low", then clockwise to retract the lens.
Since the motor (MO) must be rotated to
o, move to step 6G. Next, No. 67
In the step, set the terminal (014) to ``Hi, l, 11.
Rotate the motor (MO) at high speed, and
Move on to the next step. No, at step 51 flag LCF 1 becomes °゛1
”, the low con 1 to last remains.
The nearest or infinite terminal position has been reached at
Stop the motor (MO>! (No, 53>, (il
l) becomes “l L O, II (No, 55
), flag LCF, LCF 1. LCF 3 to pa 0°'
Then, return to step 25. Now, let me explain the series of operations in the case of [low contrast]
. First, if the contrast is low in △1: mode, the output cap
-1- (OPO) outputs “101°°” and displays a warning.
(No, 105), then 7 lag LCF is ゛1
(Noy107).Here, if the flag LCF is 1”, then
Well, this is the first time I've had a low con 1-last 1-
For example, set flags LCF, LC, F3 to ``1'' (No.
, 108, 109), No, the highest step in step 110.
It is determined whether this is the first operation (FPF=1). Flag F
1) If [ is 4"0°°, the operation up to that point is low
It is not trust, and there is a possibility that this measurement is an error.
Therefore, move to step No, 280, and
After the steps of o, 270 and 271, the step of No.2
Return to the top and perform the measurement again. At this time, the motor
– is rotating towards the previous calculated value. Note that the termination flag [N[2 is i+1-u, No, 110]
If you go through steps and move to step NO, 280
If so, the motor (MO>) has stopped rotating, so turn on the
Hold the power terminal [11] at 'low' (N
o, 2el), 7 lag LCF, LCF 3'O゛
' from (N 01282) to No. 25 and onwards.
First ff to stop microcomputer (MCI) operation with step
Set the I value. Also, in the step of NO, 110, 7 lag FPF is '1
”, if it is determined that it is the first operation, the flag FP is set.
F, LCF 3 to “OII” (No, 111, 1
13) Defocus amount Δ at step No. 205
Determine whether L is positive or negative. If Δl->o and it is the previous bin, flag
If FDF is 1 pass, △ is 0 and the back pin is flag FDF.
N 00206,209), the above-mentioned
NO, extend the lens in the same way as steps 63 to 66
motor for
– Rotate (MO) counterclockwise or clockwise. Next, the integral time (register
ITR content) is shorter than the constant value c1.
Separately, the integration time is below a certain value ((ITR)≧07)
(F) When the terminal (014) is "l-1iah"
Shifter (MO> Fast drive I! (NO
9213), Get % when the integration time is above a certain value
lf Ding (014) wo” L-OW” Toshi T-E-
Drive the motor (MO) at low speed (No, 214), N
o, 270 steps as If ``C' N (1, 2
Go back to step and start measurement again. like this
from now on until the measured value becomes a value that is not low contrast.
Then, move the lens in the direction determined at the beginning. Lens reaches one end position with low contrast
Then, at step No. 52, the flag is set and C[:1 is set to “1”.
'', reverse the C movement direction, and repeat the measurement.
move the lens. Furthermore, while maintaining low contrast,
From one end to the other when reaching the end position of
It takes 4T to know that the lens has been scanned, so No. 55 is selected.
step and stop working. Note that during this operation
It is determined that the measured value is low.
No, move on to step 101 and set the defaults described later.
The lens control operation is performed based on the amount of dregs. here,
If the contrast suddenly becomes lower than 1, try setting it as described above.
Ignore the second measurement value and repeat the measurement, this time.
If the contrast is also low, the flag LCF 3 becomes 1".
(No, 112), LCF 3 O''
Then move to step No. 205 and measure at this time.
Contrast is determined by determining the direction of lens movement based on a fixed value.
is constant (look for the position where it is 10 or more. FA mode (when MOF = 1>' and low con 1 to last)
From step No. 106 to step No. 115.
and set the flag LCF to "'1°'" and the flag L.
CF 1. LC'F3 °l Q II, flag [PF
1°', @ end flag ENF 11 Q II, output end
Child (012), (013) as 'low'
, No, moves to step 258, and moves to step 0', which will be described later.
and then perform the measurement again. The microcomputer (MCI) starts from steps No. 19 to 13.
N 0914.15.18.19 loop or No
, 35-40. Loop of 42-44 or No, 36-
While executing loop 41, C0D(FLY)
When the integral operation is completed, the control circuit (
As the pulse of "1liOh" is input from COT),
Microcomputer (MCI) jumps to No. 70 step
and start interrupt operation. First, encoder (ENC
), the pulse from
Set in register ECR3 (NO, 70), COD
The number of light-receiving parts of
)~(IF"0) value corresponding to the number of data input
C3 is set in register DNR (No, 71), No
, in step 72, the input terminal (ilO) is set to ``1right''.
” pulse is input.COD output △/
When the D conversion is completed, the input terminal (ilo) becomes “' l−(t
gh”, it is input to input capo-1- (IPO).
One CCD output data CD is stored in register M (D N
R”) (NO, 73). Then the register
1'' is subtracted from the contents of N R (No,
74), Borrow B RW is output from this register DNR.
No, steps 72 to 75 are repeated until
. In this way, the CCD output data CD is sequentially registered in the register.
Data M (DNR). When the import of all CCD output data CD is completed,
, set the return address and return to that address.
Perform the main operation after step No. 77.
Shift to the flow. No, in step 77, flag L-1-F is 1°'?
It is determined whether Here, if L L F is 1''
For example, the largest data MAC among data CDs from COD
D is searched (No, 7fl). This data MACD
When the highest bit is not 1'', all COD output data
Data A L CD is doubled (No, 80) and 1
'', the data overflows when multiplied by 2
will appear, so leave it as NO and move on to step 81.
. On the other hand, if the flag LLF is 0'', immediately NO,
Move on to step 81. In steps No. 81 and 90, the fi
The integer part and the shift amount of the two images in a plane equivalent to the lume plane.
and decimal part operations are performed. 'Also, these steps
A specific example of calculating the shift amount in is described in US Pat. No. 43, for example.
Proposed in No. 33007 or JP-A No. 417-45510
However, since it is unrelated to the gist of the present invention, it will not be explained.
omitted. No, in steps 82 to 85, the above
No. Similar to steps 10 to 13, motor (MO)
It is determined whether or not there is rotation. Here, the motor (MO)
If the is rotating, the pulse from the encoder (ENC)
Number of Karan 1-Data E CD is lens:') E C
R1-intake t, tL (No, 86), this data and N
Register ECR previously captured in step O, 44
The contents of 2 are compared. If (ECR1) - (ECR2), the lens has reached the end
Therefore, step No. 47 mentioned above.
If (ECR1)≠(ECR2), the lens has reached the end.
(Since it is 7, reset the contents of IECR1 to ECR2.)
Then move to step NO, 89. On the other hand, the motor
If (MO) stops rotating, immediately turn on NO, 89.
Move to step. At the step N(1,89, the input terminal (ill) is "
Determine whether Hi is 11'° and = L O, II.
When 1"J (1, 2! i focus detection movement after speed-up)
The operation has been stopped J3 and initial settings have been made.
If gl+°', No, move to step 90 and run the system.
Calculate the decimal part of the weight, and calculate N O, 81 and N O,
Due to the shift amount determined in step 90, f)A
-Scrap suspension Δ1. is released (No, 91). At step NO, 92, the AF is activated by the flag MOF.
Determine whether it is in AF mode or not, and if it is AF mode, No, 93
Go to step 100 in FA mode, No, step 100
Move to. In the case of AF mode, first the microcomputer (MC2
) is latched in the latch circuit (+-A).
The conversion coefficient KD is taken from the input capo] - (IPl) (N
o, 93), in this Y-evening 3 is O°° and 2 is “
1" (NO, 94). Here,
If k3=0 and 2=1, as mentioned above, exchange
The lens cannot operate in F mode, so it is not possible to operate in F mode.
Set the lag MOF to '1'' (F-A mode) and NO, 9
Move to step 6. On the other hand, k3=1 or 2−
If it is 0, an interchangeable lens capable of ΔF mode is attached.
Therefore, we will move on to step No. 100.
Ru. Furthermore, in step No. 96, whether kl=o or not
If it is 1-1, No, 100 steps.
Transition to zuru. If k1=0, as mentioned above, the lens moves to the nearest position.
If the lens is equipped with a lens that cannot be switched to macro photography unless the
is being used and you are trying to switch to macro photography.
It becomes. In this case, No, move on to step 220
output terminal (014)'i: "l-1-1i"
$: L, T motor (MO) Rotate at 1% speed
, Next, check whether the input terminal (i12) is “High”.
(No, 221 >.Here, (i12
) is 'l-11QII', it rotates clockwise.
When the lens is extended, the output terminal (O1
2) to '11 +Q11'' and 'low'
If so, it can be fed out by rotating it counterclockwise.
After setting (013) to "I-l igl+",
Register the pulse 1-data ECD from the encoder.
The data is imported into the star ECR2 (NO, 224). Next, set the fixed time data c8 in the register T'WR.
(No, 225) in this register TWR.
Subtract ``1'° from the value and see if BO0-BRW comes out.
Repeat the operation to determine the
When RW appears, pulse count data from the encoder
Load ECD into register ECR1 (No, 228
). Next, the contents of register F, CR1 and ECR2 are the same.
No, 22'l), (ECR
1) When ≠ (ECR2), the contents of ECR1 are converted to ECR2.
Set (No, 230) to No, 225-230
Repeat steps. On the other hand, (ECR1) = (EC
When R2), the lens has reached the closest position.
Output terminal (012). (013) to 'l-ow' and U'll-1ter (M
O) is stopped (NO1231) and the flag FPF is set to 1.
1111 (No, 232), No, 2 step
Return to top. Note that from now on, the FA mode operation will be performed. No, at step 100, the data from COD is low.
It is determined whether there is contrast. A specific example of these three steps will be described later based on the Azusa map. Here, if the contrast is low, the above-mentioned N 00105
Move on to the next step. On the other hand, low contrast
If so, the flag LCF is set to 1 in the step of N 0.101.
”.Here, L, c F are “1”.
If so, the previous measurement value is a low contrast CD.
7 lag FPF l 11I, flag LCF, 1. ,c
F1.1. , c[3 as 0″, N O,290
The process moves to step , and the mode flag MOF is referenced. If MOF=O, that is, ΔF mode, output terminal (012)
(013> is set to °“LOW” and the motor (Ml is stopped).
After stopping, return to step NO42 and perform measurement again.
make it happen Also, if MOF=1, that is, one-person mode, N
Move to step O, 240 and change to FA mode which will be explained later.
Perform the action. No, in step 101, the flag LCF=1 and the previous measurement
If constant 11r1 is not low contrast, NO610
4, refer to the 1-do flag MOF, Mol: is °1゛
° That is, if l:△ mode, NO, 240 steps
If MOF is 0°', that is, AF mode, No, 1
Move to step 25. No, in steps 125-130, defocus
Is ΔL within the focusing zone ZN 1?
A determination operation is performed as to whether the First, the lens is terminal 1
9 decoys have not been reached and the flag ENF is °°0'' (N
0.125) and once it reaches the in-focus zone, it is in focus.
Flag (1: If F is °1" (NO, 12G)
, the current measurement value 1ΔL1d7N 1d is No, 12
Compare in step 7. Here, 1Δ11<ZNI
Displays the focus (No. 128) from the input terminal (No.128).
ill) becomes °“low” (No, 12
9), No, move to step 25 and stop operation
do. On the other hand, if ;Δ1-1≧ZN 1, set the flag FPF to I
I l? +, set the flag summer FF to “0°’”, +
Proceed to step 35 and adjust the differential based on the current measurement value.
A lens control operation is performed using focus acid. Also, the lens has reached the end and the flag ENF is “1”.
In the case of No, 1Δ in step 127 and l<ZN
If 1, display the focus (No, 128 > , I
If ΔL l ≧ZN i, the previous differential A-cass side
Move to step No. 129 while the direction is still displayed.
Then, as above, (ill) becomes “Low”
It stops working. Here, if 1Δ and 1≧ZN 1
If the previous defocus direction is still displayed, select No. 1.
Move to step 29, but in this case the lens is at the end
The focus was not achieved even at the position, and the motor (MO) was controlled from then on.
It's no use, so I forced the operation of My Ni 1 (MCI).
It will stop. The lens has not reached the end (/) nor is it within the focusing zone.
It is determined in steps of No, 125, and 12G that the
Well, first of all, the first bath is in step 131.
It is determined whether the lag FPF is 1". Here, if the flag FPF is "0°", the above-mentioned No.
, the lens has reached the end as in steps 86-88.
(NO, 132-13)
4) If no, move on to step 135, and also select “
When “P” is “1”, continue with NO, step 135.
Moving on to the next step. NO, ・In step 135, the microcomputer
The focus detection command from (MC2) is determined, and the input terminal
If the child (tll) is “* Lowe, No, 25
Return to the step and stop the operation, "l-I iuh
”, the process moves to step N00136. In step No. 136, the calculated defocus
The amount ΔL is multiplied by the read conversion coefficient 1aKD, and the lens
The data N of the drive mechanism (LDR) is used
, No again, and at step 137 the flag FPF is set to °1'
”.Here, the flag FPF is Pa1”.
If so, first, it is determined whether N is positive or negative (No, 14
0), if positive, set the focusing direction flag FDF to '1°',
If it is negative, after setting it to 0°, the absolute value of e M N becomes Nl
It is set in register ECR4 as l+ (No, 144
>, flag FPF is set to “0°”, No, 166
Move on to the next step. On the other hand, in step No. 137, 7 lag FPF is ``0''
If so, first check if the previous drive amount data is stored.
The contents of register ECR4 are moved to register ECR5.
(No, 14io), instead of 1 at this point
The pulse count data ECD from the reader (ENC) is
It is taken into register ECR4 (No, 151). In other words, [cr<s is the counter at the end of CCD integration.
The data TCI is the count at this point in ECR4.
This means that data Tc2 has been set. Next, CO
834) Movement of the lens during 1Il1 required for the integration of D
Φτ−T Co −TCI is required to calculate N.
Lens transfer during this period! FJJ hanging 1o = Tcl
-Tc2 is calculated. Here, the integration period of COD is
If N is obtained at an intermediate position, at this point
τ/2 + to
only moving. Also, from the N' rn obtained in the previous flow, the lens
Data N''m=p4'm-τ after correcting the movement amount τ+to
-10 is calculated. Note that this data N”Ill is not required.
It is positive. NO, in steps 155 to 157, defocus MN
Whether the focusing direction has been reversed according to the positive/negative flag FDF.
It is determined whether First of all, in step 155, now
It is determined whether the calculated defocus IN is positive or not.
, if N is positive, it is determined whether the flag FDP=0.
(No. 156). At this time, if FDP=O, the direction is
Since it has reversed, it moves to the step of N 0.158.
, if FDP = 1, the reverse is 1 no. (No, 15
Move to step 9. On the other hand, if N is negative, it is determined whether it is FDP-1 (
No, 157), if FDF=1, it is reversed, so
No, move to step 158, reverse if FDP-0
Since it is not a rotation, move to step 159. When the direction is not reversed, that is, the step of N 0.159
When the camera rotates, the camera moves closer to the focus position.
Therefore, it is assumed that the value of N is obtained in the middle of the integration period.
Then perform the calculation IN+-τ/2-tO=N'
(The movement due to motor rotation is corrected, and then this N
It is determined whether or not ' is negative (No, 160). here
So, if N'< Q, it means that the object has passed the in-focus position.
Set IN'l=N' and move to step 164.
If N'〉0, then No, step 161, the previous time
Average of data N j−m and N′
Take (N"l!l+N')/2=Na (NO0161
), and this data Na is set as Nl11 (No, 162
), No, move to step 166. When the direction is reversed, i.e. j'Jo, step 158
In step, τ/2+t from the time when the current data was obtained.
Only o from the focus position in the current defocus direction? i! [
Since it is, INI+τ/2+to = N' correction
The fraud is carried out and the process moves to step No. 164.
Ru. No, in step 164, between N''Ill and N'
The average (N"II - N')/2-Na is calculated and then
It is determined whether this average 11Na is negative or not ( N
o, 165). Here, if Na>O, the above-mentioned No, step 162
If Na < 0, the terminals (012), (01
3) to 41 Lowll and stop the motor rotation.
Let (No, 174), focus zone data ZN
Multiply 1 by the conversion coefficient KD to calculate the focus zone motor.
Calculate rotation amount data Ni (No, 175)
. Next, it is determined whether lNa1 is less than Ni.
If (No, 17G), l Na I < Ni
Since it is in the focus zone, set the focus flag IFF to '
1゛′ and then No. 12 after going through 270 steps.
Sten 7 kml? 1'y'TJ le. On the other hand, 1Nal>N
If it is i, it has passed through the focus zone and the flag F
Set the PF to 111 TI and use the same steps for N 01270.
After step N092, the measurement operation is stopped.
Reset. Now, in step NO, 166, the near focus zone is shown.
Apply KD to the data NZ to change the focus position from the near focus zone.
Data corresponding to the amount of lens drive up to this point is calculated. Next, in step No. 167, the near focus zone value ZN
1 and KD, calculate Nt = ZN IXKD.
Therefore, the data N1 of the lens drive amount in the focusing zone is calculated.
(No, 167) and Nm and Nn are compared.
(No. 168). Here, N11l≧Nn, that is, near
If it is outside the focus zone, move to step 181.
and connect the terminal (014) to “L Hi o l+ 11 left”
to rotate the motor (MO) at high speed and turn the encoder (
1- for down-column pulses from
Set Nm Nn@nQ to counter ECC (No, 18
2), No, move to step 185. On the other hand, if Nl < No, it is determined that it is within the near focus zone.
If separated, No, at step 169 N11l<N1
Determine whether or not. Here, if Nl1l≧N1
, within the near focus zone but not within the focus zone
and set the output terminal (014) to “'Low”.
Reduce the rotation speed of the motor (MO) No. 183)
, Nm wo force'y>ri E CCk-Ku constant L and T(N
o, 184 > , move to step 185
. In addition, K D is lff1 shadow distance #! 11.
When using a lens, the camera will defocus if it is not in the near focus zone.
direction (lens control is performed only by Li)
, when extracting defocused clear, No. from 150
Since the correction is performed by moving the lens, this model for Inajo uses
No for data, N11l -N in step 182
S2 is set to the counter ECC. Also, Nll1<
For Ni, output terminals (O12) and (013)
l L Set 0W11 to stop the motor (MO) (
No, 171), set the focus flag IFF to "1'"
No. 172), disable counter interrupts (
No, 173), No, return to step 270
, perform confirmation measurements again. Now, in step No. 185, the flag FDP is 11.
111 is determined. Here, FDP is II I
If it is II, it is the front pin, so it is the output port (OPO)” 1
00” and lights up the light emitting diode (LDO).
Display the previous bin (No, 186>, 'O')
Since it is the rear bin, '001' is input to the output port (OP, 0).
output and light the light emitting diode (LD2) to display the rear view.
(NO, 189). Next, the contents of this flag FDP and the input terminal (i12) are
The motor (MO
＞Clockwise or counterclockwise (No. 18)
8.1ri1), No., move on to step 192
, determines whether the input terminal (i13) is “Higl+” or not.
Ru. Here, the conversion coefficient changes depending on the travel distance -
The interchangeable lens is TW and (i13) is 1-IiOh"
If so, No, step 193 will tell you whether it is NIl or Nn.
Determine if it is a fish. At this time, it is outside the near focus zone and N
If 11l≧N +1, the above No. 182 step
It seems that you immediately moved from the step to No. 185.
, depending on the direction signal, regardless of the calculated Nm.
Determine the direction of rotation of the motor (MO) and rotate it. Next, check whether the integration time is longer than the constant time value corresponding to CI.
No, 194), if it is long, record it.
There is a possibility that the lens may go too far at the in-focus position R.
Child (014)! Set L 0W11 and motor (MO
) is driven at low speed (No, 195), counter interrupt
as impossible (No, 196), No, 2
After going through step 70, return to step No. 2. on the other hand
, No. At step 193, N11l and Nn are close.
When it is determined that the object is in the focus zone,
As with regular interchangeable lenses, counter interrupts are enabled.
(No, N17), No, return to step 270. Also, when the input terminal (i13) is 'low'
Enable counter interrupt and go to step N00270
return. Now, while the motor (MO) is rotating, the encoder (ENC)
) Contents of counter ECC that counts pulses from
When becomes 0'', a counter interrupt occurs and l'Jo, 20
At step 0, it is determined whether N11l < Nn.
. Here, if Nll1<Nn, the monitor is in the near focus zone.
The focus zone was reached immediately when the motor (MO) was being rotated.
Therefore, the output terminals (012) and (013
) as 11 L oll and the rotation of the motor (MO)
<No, 203), focus flag (I
= F) to “1” and go to step N00270.
return. On the other hand, Nll≧Nntll'' is ′, near focus
This means that the output terminal (014) has reached "L".
ow” and set the motor to low speed (No, 201)
, Nn is the counter ECCk:li constant (N 00202
) Return to the address where the interrupt occurred on Sita 1N. Next, in step No. 104 or No. 290,
When it is determined that the lag MOF is 1°', N o
, FA mode operation is performed in steps after 240.
Ru. First, in step No. 240, the flag FPF
It is determined whether FPF is “1”. Here, FPF is “1”.
If it is 1″, start 1: Operate in FA mode.
and when switching from F mode to
Set flag ENF to ``0°'', focus flag IFF to ``0°''
, and the focus zone is set in the focus zone discrimination register IZR.
Set the data for 7N2. Furthermore, this data ZN 2
is a value larger than the data ZN 1 in AF mode.
ing. This is the motor drive in case of F mode.
Although the lens position can be adjusted more precisely,
In A mode, the lens position must be adjusted manually, so
This is because it is very difficult to properly adjust any dents in the motor drive. Next, at step No. 245, 7 earth pass flag
F P F to II OII and NO, 246 steps
to the top. On the other hand, if the flag FPF is 0'', immediately
NO, move to step 24G. At step No. 246, the focus flag IFF is set to “
1°' is determined. Here, flag 1FF is
II If 1 +1, the calculated value up to the previous time is in the focus zone.
Therefore, the previous calculated value Δ1n-1 and the current cylinder
The average value of Yosaki ΔL, that is, Δ1n=(Δ1-1−ΔL,
rll ) / 2 deception was carried out (No, 74
7), as data for focusing zone in register IZR.
ZW (>ZN 2) is set (No, 248
) After that, the process moves to step No. 250. this is
, there are variations in the distance of each n, and - within the focusing zone.
When the camera enters the camera, the width of the focus zone expands.
Increase the probability of being identified, and ensure that the lens position is at the boundary of the focusing zone.
This is to prevent display fluctuations when the device is nearby.
Ru. On the other hand, at step N00240, the focus flag IF
If F is 0′”, let the current measurement value Δ[ be ΔLn and N
O, 249), No, move on to step 250. NO, 250 (D: 1. step is 1ΔI-rl l
<(1'; lR), that is, the calculated value is within the focus zone
Determine whether Here, the mouth within the focus zone is
When it is determined, the focus flag IFF is set to II I 11.
(No, 251), light emitting diode (LDI)
(NO, 252>, NO,
Proceed to step 258. On the other hand, if you are outside the focus zone,
When it is determined that ΔLn > 0, it is determined that
(N o, 253), if ΔLn>O, the light emitting diode
Previous bin display by (LDO>), if ΔLn <Q (L
Post-bin display according to D2) is performed. Next, focus flag I
FF “'o” t,, IZRk-data ZN 2
Setting (,4T'4 o, move to step 25B. j'J o, in step 25B, input terminal (114)
Determine whether °l F(igl, II, 'l
-1ioh” flag if it has switched to AF mode.
FPF is °′1”, IFF is IQ 11°LCF is
0°' and No, step 2 again = 10. e
If it remains in FA mode with +, it will continue to step N002.
Return to the top and take the next measurement. No. In steps 25 to 33, AF, FAt
- Stopping focus detection operation and setting initial state by mode
The work is done. First, interrupts are disabled (No, 25
>, output a pulse to the terminal (011) to calculate the integral movement of COD.
The operation is forcibly stopped (No, 26) and the terminal (012
), (013) to “Low” to turn the motor (
MO) is stopped (No, 27) and the output port (OPO
) to "o o o" to make a light emitting diode (LD
O), (LD 1), ([D 2) are off.
(No, 28), terminal (01 (3) is set to '+-owI
The power supply from the power line (VF) is stopped as I (
No, 32). Also, flags IENF, IFF, 1
．． - “0” in CF3, °゛1゛ in flag F P F
' is set (No, 29-31.33). this
After the initial settings are made, the process returns to step N002. Next, as a modification of the above embodiment,
The subject area to be focused on during the focus adjustment operation is the focus zone.
When the depth of focus is reached, other subject areas are within the depth of focus.
Proceed to main flowchart 1 that shows whether or not the
It is. That is, in the step of NO, 127, the focus zone
It is determined that the focus has been reached, and an in-focus display is performed.
(No, 128), flag lFF1 is set to "'1".
2 (No, 300), the microcomputer (MC1) in the second illustration
Set the output terminal (030) to I High= (N O, 3
01) Zuru. This output terminal (030) is the input of my input (MC2).
It is connected to the terminal (i5), and the microcontroller (MC2) is
The input terminal (i5) Higl, ++ causes the lens to
It is determined that the camera has reached the in-focus position. Next, the microcomputer (MCI) returns No, step 270.
[If it does not switch to FA mode]
Now, return to step 2 and perform the measurement again. child
In this case, the flag IFF is '1'', so it is necessary to check the focus.
Go through the same flow as above until you reach step No. 91.
Ru. Step No. 0191 and Step No. 92
It is determined whether the flag IFF+ is 1" between
Step (No, 305) is provided, and flag I
If FF 1 is “O”, NO, go to step 92, “
If it is 1°', No, the process moves to step 306. In step No. 306, the aperture value AV for exposure control is 1.1 between the input port (IF5) and 3, and the aperture value AV for exposure control is I, 'O board.
(#80), and this aperture value is output from the decoder (#80).
) With the pulse from the output terminal (an+2) of FE C)
It is latched in the latch circuit (LA 1).
, the input capo-t- (IF5) contains aperture value data for exposure control.
data is input. The read data AV is converted to FNo.
, 307), N O, in the step of 308 ΔD=δ×
FNo. is calculated. Here, δ is the allowable amount
The value corresponding to the diameter, ΔD is the value corresponding to the depth of focus.
. Next, if you get No at 7[+-, step 91 this time,
The defocus hanging 1ΔL1 and ΔD are No, 309
is compared in the following steps, and the N
o, move on to step 27o. Here, if 1ΔL1≦ΔD, then the measured
The part of the object will be within the depth of focus and the output port
(OP5) outputs a signal of "0 'I O"2 to light the light emitting diode (104) shown in the enclosed diagram.
° [The focus is displayed. On the other hand, if 1ΔI-1>ΔD
If so, depending on whether Δ1 is positive or negative (OP 5)
Output “100” to the LED and turn on the light emitting diode (LD3).
Turn on the front bin display or '001'
output and light up the light emitting diode (LD5) to display the rear view.
is displayed. If you perform this kind of operation, the AF mode
After the lens reaches the in-focus position, move the lens to the in-focus position.
Depth of focus is in areas other than the area measured for driving.
Is it within the range, or is it the front pin or the rear pin?
It has very easy-to-use effects such as being able to check
. In addition, the accurate depth of focus is calculated in step No. 308.
However, due to camera shake etc. (+>1 is the subject)
It is difficult to precisely match the desired part of the
, the calculated values of ΔL also vary, so the FA mode of
Expand the focus zone in the same way as when
When using TC 4G, you can widen the focus zone or focus several times.
Improve accuracy by processing the average value of the calculated data
It's like that. For example, to widen the width of the focusing zone, ΔD=1×δXF
N(1(+=2~3)) etc. In this modification, the microcomputer (MCI) stops operating.
Initial setting of the curse, initial setting when switching to FA mode
For setting, step No. 33 and step No. 2
Between the steps, No. 273 step and No. 2 step
The following steps are inserted between each step.
There is. In other words, set the flag IFF 1 to 0'''N
O,320,N O,325), chemical capo-1~(CP
5) outputs 'o o o' and lights up the light emitting diode (
1-D 3) , (LD 4) (1-D(1-
D 5) is turned off (No, 321. No, 32
6), set the output terminal (030) to 1°LOW l-
Juru (No, 322. No, 327). Even after the MES is released, the display operation of the above modification example will continue.
In order to perform this for a certain period of time, step #38 and #
Determine the state of the input terminal (i5) between step 3i
A step (#81) is inserted. Immediately, photometry
The switch (YES) is open and the AF mode is active.
Even if it is determined that the input terminal (i5) is
11 and the microcontroller (MCI> has the depth of focus mentioned above)
If you are performing an operation that determines whether the
It is a circuit diagram which shows the example of a shell of a terminal (01) (COT). The counter (CO24) is a clock from the counter (CO22).
The rise of the pulse (DP2) obtained by dividing the lock pulse (CP)
Click the drop of this counter (CO24).
The decoder (D
E20) is 1'Hi at the output terminals (TO) to (TO).
A i t- signal is output. This counter (CO2
4) output and the output of the decoder (DE20) and the flip
70 Tsubu (FF22), (FF24) (FF2
6), the relationship with the Q output of (FF28) is shown in Table 71
．． (Left below) This table 7
As is clear from the Flip 70 Tsubu (FF2 (3)
The Q output (φ 1) of the counter (CO24) is "
Between "11101" and "ooioi""' l-11
g1t”, Q output of flip flop (FF24)
Horn (φ2) is between “ooioo” and “10111”
"'l-1igl+°', fritsuno flop (FF2
2) Q output (φ3) is "'10110" ~ "' 1
1110”, it becomes “’ ) l igb”. This output
Rikishin 8 (φ 1). (φ 2), (φ 3) are powered from the power line (V")
is given to COD (FLY) while the
Analog signals are constantly being transferred within the transmission gate.
. Note that this operation causes the remaining inside the transfer gate to
Accumulated charge is also drained. Power-on reset circuit (Po
At t, the reset signal (PO2) from 2) causes flip 7
0 Tsubu (FF 20) ~ (FF 28). (FF32), D flip 70 tube (DF20). (DF22), (DF24), counter (00
20). <CO22>, (CO24) is cut. difference
Additionally, a flip-flop (F F 30) is set.
Then, the Q output becomes “= 11 i, l, IT. This output
Analog switch (As 2) by force (No. 1 (φR))
are interconnected, and the output potential of the constant voltage source (Vrl) becomes (n@ line (
AND) to the CCD (FLM), and this
The potential of the charge storage part of CC[) (FLM> is constant at the potential
be done. Integral operation from the output terminal (010) of the microcomputer (MCI)
A “Higl+” pulse is output to start the
Once installed, the free
The flip-flop (FF30) is reset to 1 and the terminal (φR
) becomes “L, ow”. With this, COD
(FLY) opens charge accumulation according to the light receiving part of each light receiving part.
start In addition, analog
The monitoring switch (As 1) becomes conductive and the COD monitor
The output is from the terminal (ΔN F3 > to the comparator (AC1
> (-) terminal. The terminal (
The COD monitor output from the AND) is low from the potential Vrl.
until it reaches a potential of constant voltage 1!1 (Vr2).
, the output of the comparator (△01) is ' @ igl+
”. This completes the accumulation of C0D(FLY).
It is detected that the process has been completed. This inversion creates a one-shot circuit.
(O310) outputs a pulse of “' 11 igh°”.
is applied to the flip-flop through the OR circuit (OR20,).
(FF20) is written. “’ of this Q output
fl ioh” signal is the rising edge of the terminal (φ1)
Therefore, it is taken into the D flip-flop (+)F20).
, due to its Q output "'Htgt+", the counter
Relene of (CO20) [-state is released, AND circuit
(8N60), (AN64), (AN(36)
, (AN68) is enabled. Terminal (φ1) rose to 'Hi(]11''
After that, when the terminal (TO) becomes 'ioh', it will flip.
The flop (F F 2B> is "" t of terminal (10)
-1ioh", the terminal (T1)'s"
This Q output is re-energized by “High”.
'H from the terminal (φT) via the circuit (A N 68)
igh” pulse is sent to COD (FLM),
This signal transfers the accumulated charge to the transfer gate. moreover,
This (φT) signal is the interrupt terminal (
The microcontroller (lvlcl) is sent to the above-mentioned COD
(FLM) output data is taken in. When this terminal (φd) falls to 'low', one
Flip-flop via shot circuit (OS 1G)
(FF32) is set, and its Q output is “'Low”
The AND circuit (8N68) is closed by
From then on, from the Q output of the flip-flop (FF28)
@igh” signal is not output.
via the gate circuit (O8IC4) and the OR circuit (OR32)
The flip-flop (FF30) is set and the terminal is connected again.
(φ1<) is set to ``to1high''. Transfer No. 18 (φ1), (φ2), (φ3) makes CO
Accumulated charge is sequentially transferred from D (FLM) to terminal ゛ (AOT)?
However, the charge at the mouth (φ2) is “Hi”.
It is output during gh°'. Therefore, D flip-flop
The Q output of the drop (DF20) is II Hi, l, =!
Then, (φ2) becomes “l-1i(711”)
It is reset by "l-1igl+" of the terminal (T4) within the period of
Sample hold circuit signal @ (φS) is AND times 1B <
A N (3G>) and i+H of terminal (T5)
A signal (φΔ) for starting A-D conversion by i a i -
is output from the AND circuit (AN (i4). Also, first from the terminal (AOT) of COD (FLM>)
The accumulated charge signal sent to Offcella 1~Adjustment
As a result, only the charge corresponding to leakage in the light receiving area is accumulated.
The length is so high that the peak potential (Vrl) is
is equal to At this time, D flip flop (
The Q output of DF2.4) becomes "' H1g11 °".
Therefore, the sample and hold signal <φS) is
Ripple hold circuit (SH
CC['
) (FLY) to terminal (AOT) /? And Nanpurho
stored in the field entry (8111). first zumble
1) Flip due to fall of hold signal (φS)
The Q output of F [1 tube (1) F24) is “Higl+
', and the subsequent Leansorhold belief @(φS) is
Sample and hold circuit via AND circuit (△N72)
The potential () given to (SH2) and corresponding to the amount of light received thereafter
are sequentially stored in the sample hold circuit (3H2).
Ku. Q output of D flip-flop (DF20) is "@i
gt+”, the signal at (φ3) is connected to the AND circuit (△
One input of the AND circuit (8N62) via N60〉
given to the terminal. At the first fall of this (φ3)
The Q output of the D-flip tube L1 tube (DF22) is Htgh.
”, so the pulse signal of (φ3) after the second time is
Microcontroller (MCI) input via the command circuit (AN62)
A power terminal (NO) is given to the microcomputer (MCI).
A signal that commands the import of data to the power boat (IPO).
number. Here ℃, 1 tube in D Fritzbufu (DF20)
The Q output of becomes 'l-1iah' and the first AND circuit
The (φ3) pulse from (△N60) is connected to the AND circuit (A
The reason for not outputting from N62) is the above-mentioned
The data from the first COD (FLM) is offset
This is because the data is for adjusting the pitch. Also, the signal of (φ3)
is also given to the clock input terminal of the counter (CO20).
The counter (CO20) is
'l-l igl+' of the Q output of the module (DI"20)
The reset state is released by the pulse from (φ3).
Click the falling edge. This counter (CO20
) is the number of light receiving parts of COD (Fl-M) (φ 3)
When counting the pulses from the terminal (CY),
')light"'. From the 24th onwards, the sample hold circuit
2) The output data of COD (FLM, ) is the signal (φS)
is sampled and held based on the resistance (R1),
(R2), a subtraction circuit consisting of an operational amplifier (OA1>)
The output of the number hold circuit (SHI) and (S)l
The difference with the output of 2) is extracted, and the Δ-D variable yA
) can be sent to the analog input terminal. △−ri transformer (
AD) starts operating at No. 18 of (φA), and the counter (
Based on the clock pulse (DP I) from CO22)
The input data for the lever is A-D converted. Here, constant voltage source
The output of (Vrl) is V'1, and the voltage drop due to leakage is Vd.
, if the voltage drop due to the light receiving part is Vl, then the sample hole is
The output of the field circuit (Sl-41) is ■r1-1/d,
The output of the pull-bold circuit (SH2) is ■rl-Vl-■
d. Therefore, the output of the subtraction circuit is called Vl.
The signal component is only the received light m. In addition, A-D conversion W
(AD) is a high-speed A-D conversion, such as a successive approximation type.
It is preferable to use a model that can be replaced. A-D conversion of all data from COD (FLM>)
is completed and the carry terminal (CY) of the counter (CO20) is
)but'! -1ight'”. This causes one shot.
via the cut circuit (0814), OR circuit <OR22)
Te Flip 70 Tsubu (FF20). (FF32), D Flipf ('D F20
). (DF22), (DF24) are rehit and D
The Q output of the flip-flop (DF20) is 'L OW'
The counter (CO20) will be reset.
There is a “High” pulse from the terminal (010).
Returns to the state before input. In addition, the integration time is determined by the timer of the microcomputer (MCI).
It is determined that the constant 11i J level has been reached and the terminal (0
11) When the “il light” pulse is input to
The one-shot circuit (08
12), flip-flop via OR circuit (OR20)
(Fr20) is set. Therefore, from now on
When the output of the regulator (AC1) is reversed to 'HH,hu
The same operation as above is performed, and the output of COD (FLY) is
The data is converted from A to D and input to the microcomputer (MCI).
A similar example to t-(IPO), output data from COD
If the data is small, import the data to the microcontroller (MCI).
/vda-shun, the operation to double the data is performed by a microcomputer (M
CI)? In the software (No. 78-82 steps of the funeral map)
Hard RF was used before performing A-D conversion.
It was made to sound like a growl. Constant current while terminal <φR) is “'l-1ic+h”
Determined by source (CIS), resistor (R10) - (R13)
A potential ■r1 is applied to the CCD (FLM), and “L
During “OW”, the COD (FLM) monitor output is
(-) input terminal of parator (ACIO) to (AC12)
given to. Then, the integration progresses and the monitor output becomes v'
When the potential of 2 is reached, the output of the comparator (AC12)
] changes to l Hi, i II and becomes a one-shot circuit (
"l-1igl+" pulse is output from OS 10)
This pulse causes the OR circuit (OR20) to
After the flip-flop (FF20) is reset, the previous
Perform the same operation as described above. Furthermore, this pulse is connected to a D flip-flop (DF32).
~ (DF38) is given to the clock terminal. At this time
, the output of the comparator (AC12) is 'High'
Therefore, the Q output of the D flip-flop (DF38) is "'
High”, analog switch (△848),
(AS38) is conductive. Here, resistance (R30) ~ (
The value of R40) is R30= R40= R38=R48=
R36/1, 5=R46/1, 5=I or 34/
2=R44/2-R32/2.5-R42/2.5=and
L12, analog switch (Δ838), (△
548), R30= R40= R38=
Since it is R48, Vl from the operational amplifier (0△10)
The signal is output as is. When the COD output is low contrast and the longest integration
If the output of the comparator (AC12) is not reversed within
In this case, the output terminal (,011) of the microcomputer (MCI)
From one-shot 1 to circuit (OS 12) by signals from
The output of l-1igt+'' is passed through the OR circuit (OR20).
signal is output, and the monitor output at that time is Vr2~
Vr3. V r3 to V r4. Vr4～Vr
l depending on whether it is between
Shivor circuit (EO4), (EO2), inverter
D Noritub flop (1) F
Q of 2O), (DF34), (DF32)
One of the backs of the output is l-1ioh", and each
Analog switch (△33G>, (AS4(3),
(△334). (Δ544), (Δ832), (AS42) are
I go to school. Therefore, the integration is forcibly stopped and the current monitor
1.5V1.2Vl depending on the output. 2.5V, I signal is output from the operational amplifier (0Δ10)
be done. Figure 1 shows the microcomputer (MCI) shown in Figures 1 to 3.
A modified example of the operation is shown, and measurement is performed once focus is detected.
Flower when out-of-focus is detected continuously in the results
Showing the main part of 1-, No. 130 step No. 1
The step to fW flag IFF 2 between step 38
step is inserted. In other words, the lens reaches the in-focus zone.
The focus is adjusted and the end flag ENF is 0''.
If (N o, 130), the step of N o, 351
It is determined whether the flag fFF2 is 1'' or not. child
Here, if flag IFF 2 is “OIt”, this flag
Set lFF2 to 1″ and move to step N 00270
Then, measure again for confirmation. On the other hand, flag IF
If F2 is 1″, the measurement result will be confirmed twice in a row.
This results in out-of-focus (1△Ll≧7N 1).
If , flag IFF. Set IFF 2 to 0, flag FPF to 1,
Move to step J'y0.135 and adjust focus again
perform the desired action. In addition, No. 33 step and No. 09
2 and between the steps of NO, 240 and
A flag IF is set between the steps NO and 241.
Sunin1 to avoid rehitting F2 and returning to the initial state
-Las 1- Specific steps to determine whether
It is low. First, set the contents of register C to ``O'' and C(
No, 370), register i to ``1'' (No, 371
) Zuru. Next, the output of the 1st and t+1th photodetector is
Power a! , aj-11, the absolute value of the difference 1ai-ai-1-1
Add the contents of register C to l and set j to register C.
(No, 372 >, 1 is added to this register i
(No, 373), the content of this i is 11 (the mouth is
The total number of light receiving elements r is compared with (No, 37
4). Here, if i<ni-i, then NO, 372
Return to the steps, and in order, the absolute 1 point difference is (＾
, when i = n-1, move to step No, 375.
Overturn the line. That is, when moving to step No. 375
The contents of register C at point Hal-a21+l
a2 a31 -+-I a3 a4
1 + ++ + 1all 2
an-11-1-1an-1-an l,
As is well known, the value indicates the contrast of the subject.
There is. In step No. 375, this value is greater than the constant value CD.
If (C) > CD, then control
If there is enough last, move on to step 101.
, (C)≦CD Since the contrast is low such as IJ, No.
, the process moves to step 105. J5, the focus adjustment state is detected using two series of light receiving elements.
When using force, one system is used to determine whether
It is sufficient to use the output of Also, the subject
The data that can be associated with truss 1~ is the defocus amount.
If it is found in the process of performing mn in the defocus direction,
, memorize this data and use J3 to keep it constant (below itl).
Contrast 1~
The determination may be made as follows. 1 As described above, the present invention t predicts the imaging position of the object to be focused.
A detection means detects the direction of deviation from the fixed focus position, and
The drive means on the camera body side is driven based on the direction of the misalignment.
The force is transmitted through the transmission mechanism of the interchangeable lens [focusing lens]
Lens interaction model in which automatic focus adjustment is performed by transmitting information to
Interchangeable lens transmission in camera automatic focus adjustment device
It is uniquely determined by the mechanism and the driving means is the focusing lens.
Driving direction of the driving means for moving the lenses in the feeding direction
A signal output means is provided to output a signal, and
The above settings should be made so that the direction of movement of the focus lens corresponds.
The driving means is aligned based on the deviation direction signal and the driving direction signal.
Drive it in the direction! Determine whether to drive J or in the other direction.
Since it is designed to
The relationship between the moving direction of the focusing lens is as follows.
Automatic focus adjustment is always performed regardless of whether
Well, in order to align the above relationships to the predetermined relationships as in the past.
The problem with interchangeable lenses is that they become larger and more fragile.
The convenience is resolved, and the degree of freedom in designing interchangeable lenses is increased.
Make it.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram showing an outline of the camera system according to the present invention, Fig. 4 is a flow chart showing the operation of the microcomputer (MC2) in Fig. 3, and Fig. 5 is a flow chart showing the operation of the microcomputer (MC2) in Fig. 3.
Figure 6 shows the circuit configuration of the converter (GV) and interchangeable lenses (L, E'') mounted on the camera body. The circuit diagram, Figure 7 is a circuit diagram showing the specific circuit configuration of the light emitting diode drive circuit ("ΔD") controlled by a microcomputer (MCI), and Figure 8 is an optical circuit diagram in which the conversion coefficient changes depending on the focal length. Graphs showing the relationship between the focal length and conversion coefficient of a variable power lens having a variable power system, FIGS. 9 to 11
The figure is a flowchart showing the operation of the third microcomputer (MCI), FIG. 12 is a circuit diagram showing the main circuit configuration of the first modification of the camera system in FIG.
Figure 4 shows the microcontroller (MC2) corresponding to this modification.
) and (MCI), and Figure 15 shows the specific circuit configuration of the control circuit (COT) that is controlled by (MCI) and (MCI). The circuit diagram and RF116 diagram show the circuit configuration of the main part of the modified example, and the diagram 4117 shows the main part of the other modified example of the flow of the microcomputer (MC1). FIG. 18 is a flowchart specifically showing the operation of the microcomputer (MCI) in FIG. 9 at step No. 100. BD = camera body, LE: i-shadows, FLM. 105: detection means, 109: signal output means, 110: drive direction selection means, MC1, MC2: microcomputer. Applicant Minolta Camera Co., Ltd.

Claims (1)

[Claims] 1. A detection means for detecting the direction of deviation of the imaging position of the object to be focused from the expected focal position by receiving the light from the object to be focused that has passed through the photographing lens, and the focus of the photographing lens. It is uniquely determined by a driving means for selectively driving the transmission 5RPi structure in one direction J3 and the other direction for transmitting driving force to the focusing lens, and a transmission mechanism of the photographing lens, and the driving means drives the focusing lens. Outputs a signal indicating the driving direction of the driving means for moving in the feeding direction (G output means and the detecting means so that the direction of shift of the detecting means corresponds to the moving direction of the focusing lens. Automatic focus adjustment of an interchangeable lens camera, comprising a drive direction selection means on the camera body side that selectively determines the drive direction of the drive means based on the direction of deviation from the drive means and the drive direction from the signal output means. Device.