JPS59206806A - Focusing state checker - Google Patents

Abstract

PURPOSE:To enable easy checking of whether the image-forming position of a desired object part except the object to be focused is within the depth of focus or not by providing a means for checking and displaying the depth of focus corresponding to an aperture for photographing in response with the decision on focusing. CONSTITUTION:The 2nd discriminating circuit 108 for a focusing state starts operation when the image-forming position arrives within a focusing region and a motor (MO) is stopped by the 1st discriminating circuit 107 for the focusing state. When the direction of a camera is changed to the desired part of the object except the object to be focused in this state, the data on the defocusing quantity and direction relating to the desired part is outputted from a signal processing circuit 106. The circuit 108 compares the data on the depth of focus of the width corresponding to the aperture for photographing given from an output circuit 105 for aperture data and the data on the defocusing quantity relating to the desired part and displays whether the result is within the depth of focus corresponding to the aperture for photographing on a display circuit 109 for the depth of focus. The discrimination and display of the depth of focus are accomplished at every direction of the camera toward the desired part of the object.

Description

[Detailed description of the invention]

1LFF The present invention calculates data on the deviation of the desired focusing position of the human body by the focusing lens of the dancing lens with respect to the planned focal position, and adjusts the focus based on this data. The present invention relates to a focus adjustment device for a camera that operates, and particularly to a focus adjustment state display device that displays a focus adjustment state for a subject. PRIOR ART An automatic focusing device is configured to drive a focusing lens by a motor based on the data on the amount of deviation described above, and to stop further driving of the motor when the imaging position enters a focusing area of a predetermined width. For example, it has been proposed in Japanese Patent Application Laid-Open No. 55105230. However, with this device, it was only known that the imaging position had reached the in-focus area when the motor stopped operating. Generally, the light receiving section of these devices receives light only from a relatively narrow predetermined area of the photographic screen, and the data of the amount of deviation is calculated based on the output from this light receiving section. Furthermore, when photographing a subject with depth by manually adjusting the focus, the photographer takes the depth of focus into account and adjusts the focus to a photographing distance that corresponds to the intention of drawing. When photographing in accordance with such an image creation intention, it is necessary to check not only the focus adjustment state for the desired in-focus object but also the focus state for other object parts according to the depth of focus. However, since conventional automatic focus adjustment devices can only check the focus adjustment status for the above-mentioned focus object, it is impossible to check the focus taking into account the depth of focus for object parts other than the combined focus object. There were drawbacks. In order to facilitate focus adjustment, by comparing the data on the depth of focus according to the aperture value at the time of shooting or the aperture value set arbitrarily with the data on the amount of deviation above, it is possible to determine whether the imaging position is within the depth of focus. For example, Japanese Patent Laid-Open No. 55-11520 proposes a focus adjustment state display device that determines whether or not the current state is present and displays the result. However, with this device, if the imaging position is within the depth of focus defined by the aperture of the photographic lens, it is considered to be in focus, and this is simply used to adjust the focus in a predetermined area. First, focus on areas other than the designated area? It is not intended to confirm the spread of the disease. Purpose The present invention provides - in the above-mentioned focus adjustment device, a focus adjustment state display that allows confirmation of the relationship of objects other than the focused object to be focused with respect to the depth of focus of the photographic lens; ! ! It is intended to provide At. Summary of the Invention The present invention provides a focus adjustment device that detects data on the amount of deviation of an image formation position of an object to be focused by a focusing lens of a photographing lens from a planned focus position, and determines focus based on this data. In response to the focus determination, the depth of focus according to the photographic aperture can be confirmed, and it can be checked whether the image formation position of a desired subject other than the above-mentioned object in focus is within the basic depth of focus. This allows for easy confirmation. Embodiment 1 A first example showing an example in which the autofocus camera system according to the present invention is applied to a single-lens reflex camera with interchangeable lenses.
This will be explained based on the diagram. In FIG. 1, the left side of the dashed-dotted line is a photographing lens (LE) - a zoom lens as an example;
The right side is the camera body (BD), and both are mechanically connected via couplers (101) and (102), respectively.
− can be done. This camera system uses a focus lens (FL) and a zoom lens (ZL) for the photographic lens (LE).
), the subject light that has passed through the master lens (ML) passes through the central semi-transparent part of the reflection mirror (103) of the camera body (BD), is reflected by the sub-mirror (104), and is reflected by the focus detection light receiving part (FLY). ) so that the light is received by
The optical system is configured. Note that this light receiving section receives only the amount of light that is incident on a relatively narrow predetermined area of the photographing screen. The rotation of the motor (MO) is controlled by the slip mechanism (SLP), the drive mechanism (t-DR), and the camera body side coupler (1(')
2) is transmitted to the photographing lens (LE). The slip mechanism (SLP) slips when a torque exceeding a predetermined level is applied to the rear stage, and is intended to prevent the motor (MO) from being overloaded. In addition, the focusing lens (FL) of the photographic lens is connected to the transmission mechanism (100
) is connected to the lens side coupler (101). As a result, as the motor (MO) rotates, the focusing lens (L) moves in the front-rear direction of the optical axis, and the focusing lens (L) is focused. Light receiving part for (F L
Based on the received light output from
ΔL1 and defocus direction (front bin or rear bin)
data is output periodically. The first focus state determination circuit (107) compares the defocus amount 1Δ1-1 from the signal processing circuit (106) with the focus width ZN, and compares the movement of the focus lens (1)! The defocus IllΔl−1 is subtracted depending on the value, and it is detected whether 1ΔL1 becomes less than a predetermined value. For example, if 1ΔL1≦ZN, a focusing signal is output, and 1ΔLl>
If ZN, an out-of-focus signal is output. The motor drive circuit (MDR) drives the motor (MO) based on the out-of-focus signal and the signal in the defocus direction.
While driving the motor (i.e. while moving the lens)
When a focus signal is output from the focus state determination circuit (107), the drive of the motor (MO> is stopped).The aperture data output circuit (105) outputs the data of the aperture for itaaki. The second focus state determination circuit (108) starts operating in response to the drive stop, and detects the defocus amount output from the focus state determination (i'81 path < 107) when the drive is stopped. , 1Δ1-1 and aperture data output circuit (105)
Compare the depth of focus data corresponding to the aperture data output from the . The depth of focus display means (109) displays based on this determination result, that is, displays whether or not the imaging position is within the depth of focus corresponding to the aperture. The operation of this camera system with the above configuration will be explained in detail. First, when the motor (MO) is stopped, 1
When it is determined that Δml>ZN and the imaging position is outside the in-focus area, the first in-focus state 911 separate circuit (107
) The motor (MO) starts driving in response to an out-of-focus signal from the camera. As a result, one lens for focusing (F L,
) starts moving toward the in-focus position. The signal processing circuit (106) periodically outputs data on the amount of deviation based on the amount of light received from the light receiving section (FLY''), and the imaging position is adjusted to the in-focus area (by driving the motor (MO)). When the focus reaches a certain point and it is determined that 1Δ1-1≦7N, the motor (MOat) is suddenly stopped by the motor drive circuit (MDR). Now, when the direction of the camera is changed to a desired part of the object other than the object to be focused while the lens movement is stopped in this way, the signal processing circuit (106) calculates the defocus amount for the desired part. and direction data are output. Note that the 1-tar (MO) is not driven at this time. Here, the second focus state determination circuit (10B) is Depth of focus data with a width corresponding to the shadow diaphragm is calculated, and this depth of focus data is compared with the defocus amount data regarding the desired portion.The depth of focus display means (109) displays the result of this comparison. Accordingly, it displays whether or not the imaging position of the desired portion is within the focal image (material) corresponding to the photographic aperture. The specific contents of the automatic focusing camera system of the present invention having the above-described configuration will be described in detail below with reference to the drawings from FIG. The functions of the circuit, the first and second focusing state determination circuits, and the depth of focus display means are achieved by a microcomputer (hereinafter referred to as a microcomputer). Of the configurations shown, the camera body < BD
) is a block diagram mainly showing the configuration of the circuit section on the side. In the figure, the focal length of the lens (1-E) is, for example, 1.4 between the camera body (BD) and the lens (LF).
A converter (CV) is inserted to double or double the length. Camera body (BD) and converter (CV)
are the connection terminals JIY (CN 1) and (CN
2) Tochi connection H sale, converter (CV) and lens (
+-E) is the respective connection end -IY (CN 3)
,! = (CN 4) ,! The camera body (BD) side 10- is provided with various information from the converter (CV) and the lens (LE). Power switch (MAS)
), the power-only set circuit (PORl), microcontroller (MCI), (MC2), display control circuit (DSC), oscillation circuit (O20), inverter (INl) to (TN8), AND circuit ( Power is started to be supplied to AN 1) via the power line (+[). By starting this power supply, a reset signal (PO1) is output from the power-on reset circuit (POR1), and the microcontroller (MC)
I), (MC2) and display control circuit (DSC)
is reset. The microcomputer (MC2) is a microcomputer that performs the overall operation of this camera system in a sequential manner, and the microcomputer (MCI) performs focus adjustment operations in a sequential manner in response to control signals from the microcomputer (MC2). It is a microcomputer that can The operation of the microcomputer (MC2) is shown in the flowchart of FIG. 3, and the operation of the microcomputer (MCI) is shown in the flowcharts of FIGS. 8 to 10. The photometry switch (MES) is closed in the first step when the release button (not shown) is pressed down, and this switch (MES)
When S) is closed, '''ll iq is applied to the input terminal (10) of the microcomputer (MC2) via the inverter <lN1).
h" level signal is given. In response, the terminal (00) of the microcomputer (MC2) becomes "high", and the transistor (BT
1) becomes conductive. Due to the conduction of this transistor (BT1), the power-on reset circuit (POR3), photometry circuit (+-MO), decoder (DECl), light emitting diode driving transistor (BT3), film sensitivity setting device (SSE), aperture Value setting device (△SE), exposure time setting device (TSE>, exposure control mode setting device (MSE)
, exposure control device (EXC), and latch circuit (+-A) via the power line (VB).

[Power supply starts at ]. this
When power supply starts, power-on reset circuit (POR3)
Reset signal f”+ (PO3) is output from and exposure control is performed.
The device (FXC) is reset. In addition, a microcomputer (M
"t-1ioh" from the output terminal (00) of C2)
The level signal is processed by a converter (C) by a buffer (BF).
V) and the power supply voltage (V L ) of the lens (LE).
Connect terminal Y (CN1). (CN 2) , (CN 3) , (CN 4
), the circuit (CVC) in the converter (CV) and
and the circuit (LEC) within the lens (LE). still
In addition to this power supply terminal, the connection terminal group includes a microcomputer (M
C2) is output from the output terminal (06) of the converter.
Are the circuit (CVC) and lens circuit (LEC) reset?
A signal transmission terminal and a microcomputer (MC2) to release the
) synchronization clock from the clock output terminal (SCO) of
Pulse converter circuit (CVC), lens circuit (LE
C) and a terminal for transmitting clock pulses to
Icon (MC2) serial data input terminal (SDI) k-
- + converter (CV), data from z (LE)
Equipped with a signal input terminal for inputting data and a ground terminal.
ing. In addition, the serial data input section of the microcontroller (MC2)
The circuit configuration of the converter (CV) is shown in Figure 4.
VC) and lens <IF) circuit (IFC> circuit configuration).
As shown in the figure. The photometry circuit (IMC) is an analog of the microcontroller (MO2).
Insert the analog value photometry signal into the analog input terminal (ANI).
A quasi-voltage input terminal (VR) has a quasi-voltage signal for D-A conversion.
is giving. The microcontroller (M'C2) controls the photometry circuit (L
Based on the base t'F voltage signal from M C), terminal (
The analog photometry signal input to ANr) is converted into a digital signal.
Convert to The display control circuit (DSC) is connected to the data bus (
Depending on the various data input via the DB), the LCD display
The display (DSP) displays the exposure control value and emits the
By photodiode (l-Dlo) ~ (I Dln)
Display warnings, etc. Microcomputer (MC2) output terminal (
08) is the camera after the photometry switch (MES) is closed.
"l-1ic+h" until the exposure control operation of "l-1ic+h" starts.
”, and the transformer is activated by the inverter (TN8).
The transistor (BT3) is a light-emitting diode (lD) only during this period.
lo) ~(LDIn) is enabled to emit light. 14- The decoder ([') [EC1] is the microcomputer (MC2)
Depending on the signal given from the output port (OP 1),
Equipment (MSE), (TSE), (ΔSF). (SSF), circuit (DSC), (+-A)
data between the device or circuit and the microcontroller (MC2).
Whether to receive or pass data via Tabas (DB)
A signal indicating the exposure control mode is applied to the output terminals (aO) to (an+11).
When reading, specify from the output port (OP 1)
Output terminal (aO) becomes "l-l 1g1)" with data
By being exposed to the data bus < 1) B)
Set exposure control mode from control mode setting device (MSF)
The data shown is output, and this data is sent to the microcomputer (MC2
) is read from the input/output boat (Ilo>).Similarly,
When reading the set aperture value, the terminal (a2)
i, becomes hI+. When sending display data to the display control circuit (DSC)
,) One of the terminals <an> to (an) depending on the data
becomes 111-1 igl, -1. In addition, the records described below
When converting the conversion coefficient data (KD) of
From port 1-(l10) to data bus (DII)
After outputting the conversion coefficient data of
Output specific data for a certain period of time to terminal (an-+1)
Conversion coefficient data is sent to the latch circuit (L△) by these pulses.
latches. The exposure control device (XC) uses the interrupt of the microcomputer (MC2).
To the signal input terminal (11) = l II igj, 11
The following exposure control operations are performed by receiving an interrupt signal.
To start the operation (J, release circuit, mirror
-Equipped with drive circuit, aperture control circuit, and exposure time control circuit
There is. This device (FXC) is the output of the microcomputer <MC2).
When a pulse is output from the power terminal (04), the data bus
Import the number of refinement stages data output to (DB)
, activates the 1-noise circuit to start the exposure control operation.
Ru. When a certain period of time has passed since the start date of exposure control operation,
Exposure time data from the microcontroller (MC2) is transferred to the data bus
DB), a pulse is output to terminal <05). This allows the exposure control device (FXC) to set the exposure time data.
and activate the mirror drive circuit to remove the mirror.
1-Start the rise and activate the aperture control circuit.
The aperture is adjusted by the number of aperture stages data. reflection
When the mirror has finished rising, the front shutter curtain starts running.
will be started. At the same time, the count switch (CO8) is opened.
This activates the exposure time control circuit and sets the exposure time value.
The time corresponding to the data starts counting. count
When completed, shutter 4! The curtain starts running and the aperture
is opened and the mirror is lowered to control exposure.
is completed. The release switch (RLS) is pressed by pressing the release button.
This switch (RL S
) is opened, the output of the inverter (IN3), i.e.
One input terminal of the AND circuit (AN 1) is 'l-(t
gl)”.The switch (EFS) is the exposure control operation.
When completed, it is closed and the exposure control mechanism (not shown) can be operated.
It is released when it is charged to a capable state. this switch
The 1-signal indicates the open/close status of the inverter (IN4).
The input terminal (12) of the input terminal (MC2>) and
17- is applied to the input terminal of the terminal circuit (AN 1). Furthermore, the output terminal of the AND circuit (AN 1) is connected to the microcomputer (M
C2) is connected to the interrupt signal input terminal (11). Therefore, the charging of the exposure control mechanism is not completed.
The gate of the AND circuit (AN 1) is closed.
, even if the release switch (RI8) is closed, the AND rotation will not occur.
The output of AN 1 remains “low”.
. In other words, no interrupt signal is input to the microcontroller (MC2).
゛, the exposure control 11 operation is not started. On the other hand, exposure control
When the mechanism is fully charged, the AND circuit (
AN 1) The gate is opened 45, 1 Norieswie
When rats are closed, an AND circuit (AN
The output of 1) becomes “ )-1high” and the interrupt signal is generated.
Input to the interrupt terminal (it) of the microcomputer (MC2) and
MC2 immediately shifts to exposure control operation4. Output terminal (01) of the microcomputer (MC2). (02), (03) 1. t each my 11th
(MCI) input terminals (i 11), (i 12
), (i13). Here, exit
The power terminal (01) is set to “l” when performing focus detection operation with a microcontroller (MCI).
-1ioh”, or “l-ow” if you do not want to do it.
Become. Output terminal (02) connects the motor (MO) clockwise.
When rotated in the direction, the focusing lens (F) will extend.
If an interchangeable lens configured to
If “Hioh”, turn the motor (MO) counterclockwise.
For interchangeable lenses that extend when rotated = L
It becomes O, II. The output terminal (03) is used for focusing the imaging position.
The focus is based on the amount of deviation from the position and the direction of the differential focus.
A method of driving the focus lens toward the in-focus position (see below)
(referred to as one-way predictor type).
For interchangeable lenses with knots, “-L own”, combined
Signal in the direction of deviation from the focus position (front focus, back focus, focus)
(hereinafter referred to as the three-point pointing method)
) and this predictor type, there is no focus adjustment.
In the case of an interchangeable lens, it becomes "l-1-1i". The switch (FAS) is operated by a manual switching member (not shown).
The focus lens is opened and closed, and the focus lens is opened and closed depending on the focus state detection result.
The lens is driven to the in-focus position and the focal point vA is automatically set.
When in AF mode (hereinafter referred to as AF mode)
The focus status is displayed according to the focus status detection result.
mode in which only the m-section is performed and the focus m-section is performed manually (
It is opened in the FA mode (hereinafter referred to as FA mode). child
The open/close signal of the switch (FAS) is sent to the inverter (IN6).
) to the input terminal (11) and
and the input terminal (i14) of the microcomputer (MCI).
Ru. The output terminal (016) of the microcomputer (MCI) is an inverter.
to the base of the transistor (BT2) via the
It is connected. Therefore, the terminal (016) is "'High"
h”, the transistor (BT2) becomes conductive and the power is
-On reset circuit (PO2), focus detection light receiving section (F
l-M), light receiving unit control circuit (COT), motor drive circuit
(MDR), encoder (ENC), light emitting diode
Power is supplied to the drive circuit (FAD) via the power supply line (VF)
is started. This start of power supply causes a power-on reset.
The set signal (PO2) is output from the set circuit (POR2)
be done. For example, the light emitting diode drive circuit (FAD) is shown in Figure 6.
The circuit configuration is as shown, and the microcontroller (MCI)
output port (OPO), i.e. output terminal (017),
The data output from (018) and (01'l)
Light emitting diode (LDO) depending on the data. (LD, 1) and (LD 2) are driven. this circuit
Depending on the configuration, the output terminal (017) of the microcomputer (MCI)
, (018), (019).
When the terminal becomes “l Hi, l, II, the output for the previous bin display is activated.
Light diode (LDO), light emitting diode for focus display (
LDI), rear pin display light emitting diode (LD2)
One of them lights up to indicate front focus, focus, or back focus.
indicate. Also, output terminals (017), (019)
When the two terminals become l Hi, l, and II, the oscillation circuit (
Emit light based on the Otsuk pulse (CP) from O20)
Diode (LDO) and (LD2) at the same time
Flashes to indicate that focus cannot be detected. Table 1 shows its operating status.
shows. =21- Table 1 Focus detection light receiving section (FLM) has multiple focus detection
COD (Charge Coup)
led[)evice). control circuit
(COT) is based on the signal from the microcontroller (MCI).
COD (FLM) drive, COD output A-D conversion and
and transmission function of A-D conversion output to microcontroller (MCI)
It is equipped with In addition, from the microcomputer (MCI) to the control circuit (COT)
Then, integrate COD (FLY) from output terminal (010)
A pulse signal for starting the operation is sent to the output terminal (01
From 1), a pulse is generated to forcefully stop this integral operation.
signal is output respectively. In addition, the control circuit (COT) for the microcontroller (MCI)
, a signal is sent to the interrupt terminal (it) indicating that the integration operation 22- in COD (FI M) is completed.
Δ- of the accumulated charge for each light receiving element of 0D (FLY)
A signal indicating that the conversion operation has been completed is sent to the input terminal (il
(1) The above A-D converted data is input to the input port (
TPO) respectively. Furthermore, the control circuit (COT) for COD (FLY)
, the reset signal is sent to the terminal (φR), and the
is the terminal (φ1), the transfer clock is the terminal (φ1),
(φ2) and (φ3), the reference potential is connected to the terminal (ANB).
The control circuit is input from C0D (FLM).
(COT), from the terminal (ANB) to the monitor receiver.
A potential corresponding to the amount of light received by the light section is applied to each receiver from the terminal (ΔOT).
The charges accumulated in the light section are output. This control circuit
The specific circuit configuration of (COT) is detailed in Figure 11 below.
do. Here, COD (FLY), control circuit (COT),
To explain the operation of the microcomputer (MCI), the control circuit (C
OT) is the output terminal (010) of the microcomputer (MCI).
CCt) (FLY) in response to the integration start signal from
Send a set signal and reset C0D (F L Y 'I.
At the same time, the reference potential (AQ) is measured by CCD (FL
M). Each light receiving section in the COD (FLM)
The accumulated charge increases according to the amount of light received, and this causes
The potential output from the terminal (ANB) is decreasing.
When the value is reached, a transfer command signal is sent to COD (FLM).
Accumulated charge in each light receiving part of COD (FLY)
is transferred to the transfer gate in COD (FLY).
Also, the interrupt terminal of the microcomputer (MCI>)
give a signal. And the control circuit (COT) is C0D
The stored v4N load transferred to the transfer gate of (Ft, -M)
For transfer of φ1, φ2, φ3 [receive based on 1 tsuk]
A/D conversion is performed, and the charge accumulated by one light receiving section is converted to -1
When the conversion is complete, the microcomputer (MCI) input terminal (
tlo) gives an A-D conversion completion signal. Microcomputer (M
CI> is the data converted from A to D in response to this signal.
is fetched from the input boat (rPo). Then, the microcontroller (MCI) receives COD (FLY).
When A-D converted data is imported for the number of optical elements, C
Finish capturing the OD output. Note that the microcomputer (MCI) waits for a certain amount of time to pass from the start of integration.
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).
A-D conversion of the above-mentioned COD output by outputting an interrupt signal,
Performs data transfer operations. The motor drive circuit (MDR) is the output of the microcomputer (MCI).
Given from the force terminals (012), <013), (014)
The motor (MO) is driven based on the received signal. still,
The output terminal (012) of the microcomputer (MCI) is 'Hitc'.
When h''', the motor (MO) moves clockwise and the output terminal
When (013) is "1" tgh, the motor (MO
> is driven counterclockwise and the output terminal (012), (
013) are both 25-' Low, and the motor (MO> stops driving.
It will be done. Furthermore, the output terminal (014) of the microcomputer (MC1)
) is 'l-light' and the motor (MO) is
It is driven at high speed, and when it is "low" it is driven at low speed. A specific example of this motor control circuit (MDR) is disclosed in the present application.
Although someone had already proposed it in Japanese Patent Application No. 136772/1983,
Since this is irrelevant to the gist of the present invention, the explanation will be omitted. ]-encoder (ENC) is the rotary encoder (MO).
Transmission mechanism on the camera body side that transmits the light to the lens
(L MD ), for example, using a photocoupler.
The number of pulses proportional to the amount of drive is monitored by
Output. This pulse is the clock of the microcomputer (MCI)
It is input to the input terminal (DCI) and automatically counted.
The count value ECD is determined by the microcomputer (MC1) described later.
Used for counter interrupt in flow. Also, this pa
The signal is sent to the motor drive circuit (MOP) and its pulse is sent to the motor drive circuit (MOP).
The rotation speed of the motor (MO) is controlled according to the number of pulses.
Ru. -26= Figure 3 is a diagram showing the operation of the microcomputer (MC2) in Figure 2.
It is a low chart. The operation of the microcontroller (MC2) is roughly
I am completely confused by the following three flows. #1 step
The flow starts from the power switch (MAS) open.
This is the main flow that starts with the photometry switch.
The focal point is closed (#2) by YES.
Start supplying power to circuit sections other than the circuit section for the node (#4
), exposure control information set on the camera body (BD)
Reading (#5), lens (LE), converter (CV)
Reading data from (#6 to #12), reading photometric values
(#13.14), AF mode, FA mode auto
dynamic settings (#16 to #27), exposure control value calculation (#2B
) and display (a31.#32) are repeated. #
The flow starting from step 45 starts with a microcomputer (MC2).
) is a timer that is periodically output from the built-in timer.
- Even if the photometric switch (MES) is opened by the signal,
For a predetermined period of time (for example, 15 seconds), the main 70- operation described above is performed.
This is a flowchart of a timer interrupt to perform the process. Also
, the flow starting from step #59 is the release
The exposure control operation of the camera is performed by opening the switch (RLS).
This is the flow of the release interrupt to start the release. 1
Based on Figures 3 to 6 below, the microcontroller (MC)
2) Regarding the operation of the camera system in Figure 2,
Details) Ho. First, when the power switch (MAS) is opened, the power
Reset signal (PO
1) will be output. Due to this traffic signal (Pol)
, the microcontroller (MC2) performs resetting in the main flow.
Perform the trigger operation in step #1. Photometry switch (YE
S) is closed, the input terminal is closed in step #2.
When it was discovered that the child (10) had become “Hiqh”
, disable timer interrupt #3) and set terminal (00) to
Set it to “High” (#4). This allows the transistor
(BT 1) is conductive and power is supplied from the power line (VB)
is started. At the same time, power is supplied via the buffer (BF).
converter (CV) and exchange from line (V l-)
Power supply to the lens (LE) is started. Step #5
Now, let's look at the exposure control mode setting device (MSE) and exposure time setting device.
setting device (TSE), aperture value setting device (△SE), filter
The data from the system sensitivity setting device <5SE) is transferred to the data bus (
DB) and are sequentially imported into the input/output boat <110>.
Ru. In steps #6 to #12, first set the data to register △.
The data is set to “0” (#6), and the terminal (06) is set to “l”.
−1igh ′”, converter circuit (CVC)
, the reset state of the lens circuit (LEC) is released, and (
#7-1), the data serial input command is output (
#7-2>. Converter circuit (CVC), lens circuit (
When inputting one data from 1-E C) is completed (#
8) The captured data corresponds to the contents in the register.
(#9)a Next, the register M(Δ) is set to
11111 is added to the contents of register A (#10), and
It is determined whether the contents of have become AC (constant value) or not.
. Here, if (△)≠AC, return to step #7-2.
Then, the next data is taken in again. =29-(Δ)-AC, lens (L[) and converter
(CV) This means that the import of the data has been completed.
Therefore, the output terminal <06) is set to 'low! Set it to + (#1
2), converter circuit (CVC), lens circuit (L,
Reset FC). Here, the lens (t-E) and converter (CV)
A specific example of importing data is shown in Figures 4 and 5.
I will explain next. The serial data input section shown in Figure 4 is
For example, when inputting 8-bit serial data, the output
Outputs 8 clock pulses from the power terminal (SCO),
Serial data input at the falling edge of this clock pulse
Read sequentially. That is, the serial data input instruction (SIIN)
The flop (FFI) is set and the 3-bit binary
The reset state of the Lee counter (Co 1) is released.
Ru. At the same time, the gate of the AND circuit (AN7) is opened.
, the clock pulse divided in the microcontroller (MO2) (
DP) is the output terminal as a synchronization clock output <5CO)
The signal is sent from the converter (CV) to the lens (LE) circuits 30-(CVC) and (1EC). ma1c1kori
[]Spulse is a counter (COl), shift register
(SR1) is sent to the clock input terminal. Sheet 1 register (SR1) receives clock pulse (D
P>X:I falls, microcomputer (MC2) input
The data input to the terminal (SDI) is sequentially imported.
Ku. Here, the carry one terminal of the counter (Co 1) -(
CY) is when the 8th clock pulse (+) P) is input.
The next cross pulse (r)P) is input from when the
The period up to this point is ``l-1igb''. on the other hand
, and one input terminal of the AND circuit (AN 5).
- Output is connected to the other input end of the inverter (IN 15)
Since the clock pulse (DP> is input via
The AND circuit (8N 5) is the 8th clock pulse (D
At the falling edge of P), it becomes "l-11g1)" and the
Put lip 70 knob (FF1) to resettsu 1 and counter
(Co 1) is also reset. Therefore, and
The output of the circuit (AN 5) is also the key of the counter (Co 1).
When the carrier terminal (CY) becomes l + - OWl',
low-ow” and prepares for the next operation.
(AN 5) or I).
The column input flag S I F l- is set and the data person
It is determined that the force has been completed, and the microcomputer (MC2)
register (SR1) to internal data bus (IDB)
The data outputted to C- is stored in a predetermined register M(A).
Storage 1-ru. In Figure 5, the side from the dashed-dot line is mber/1 (
CV)'s inverter circuit (CV C) 'r included, right side
is the lens circuit (+FC) of the lens (l F>.
I-1i (MC2) output terminal <06)
qh ” counter (CO3). (Co 5) , (Co 7) , (Co
9) Nori Sera 1 ~ status is canceled and these counters are
Given from the output terminal (SCO) of the microcontroller (MC2)
It is possible to do Ruri [1 Tsuku Pulse (DP)]
Becomes Noh. Bye J-Lee counter to 3 pits 1 (CO3
), (Co 7) is this clock pulse (DP)
count the rise of il, and count the rise of il of the 8th clock pulse.
ts of the next clock pulse (DP) is
Keep the carry terminal (CY) 'lligh' until
Ru. 4-bit binary counter (Co', +)
, (CO9) is the fall of this carry terminal (CY).
count the first of eight clock pulses.
The counters (Co5) and (CO9) are
The count value increases by 1. =] The ROM (RO1) of the inverter circuit (CVC) is
The record is directly based on the count value of the counter (CO3).
register is specified. R of lens circuit (L, FC)
OM (RO3) is the counter (Co 1) callan 1-
Based on the value, the decoder (DP9) and data selector (D
The register is specified indirectly via S1)
. Output from ROM (RO1) and (RO3) respectively.
Data of lens (1-[), 1 inverter (CV)
Depending on the output of the decoder (DE5), the
The force is calculated by the series adder circuit (ALl>).
The output of the sum of both or all “o” data is selected.
Selectively output. Here, the focal length is fixed
Counter for lens (CO9) = 33-dode]]-da())F9) and ROM (RO3) Tono
The relationship is shown in Table 2, in the case of a zoom 1 lens with variable focal length.
Table 3 shows the above relationship between '? 1. ．． Also, in Mbaata
O(jru counter (CQ 5) and de: Koge (f') F
! i), ROM (RO1), and output data to the camera body
Table 4 shows the relationship with the data. Furthermore, φ is the data of each bit.
'O゛'gb'''At 1°°t)J, indicates that 1J0(
1st bottom margin> -3/1. - Table 2 Table 3 Table 4 Counter (Co 3>, (Co 7) +7) output
Force (b O), (bl >, (h2) is deco
Dada (DE3). (DE7) and a decoder (DE3). (DE7) outputs the signals shown in Table 5 according to this input data.
Output. (Left below) 37-Table 5 Therefore, each time the clock pulse rises, the ROM (R
3) The data is sequentially 1 bit starting from the least significant bit (rO).
Each AND circuit (AN20) to (AN27), OR circuit
(OR5) and is output to ROM at the same timing.
(RO1) data is also
AND circuit sequentially one bit at a time starting from the least significant bit (eO)
(8N10) to (AN17), via OR circuit (OR1)
is output. Also, in the case of a zoom lens,
It corresponds to the focal length set by operating the mulling (ZR).
A 38-]-code board (FCD) that outputs the same 5-bit data is installed in the lens circuit (LEC).
I'm being kicked. Changes depending on the set focal length] - board
(FCD) output, the data selector (DS
1) The values of the lower 5 pits of the input terminal (α2) are uniquely
It's decided. Therefore, the data selector (DS 1)
When the output (h4) of the reader (DE9) is “l-aw”
is 'OOOO(l h3 h2) from the input terminal (α1)
hl ho ” data again”! -1ight
1) 2 old 1+o from Nodoki input terminal (α2) *
＊ ＊ ＊ Ni” (“r< is code plate data
) ROM (RO3)
Specify the address of. If the output of the counter (CO9) is “0000”, RO
M(RO3> address "OOH" (+-1 is hexadecimal
There is a check mark indicating that the lens is attached to the address (indicating the number).
data is stored and this data is used for all types of
Data common to interchangeable lenses (e.g. 010101(N)
It becomes. At this time, the camera body (nD) and lens
A converter (CV) must be installed between the
For example, the output terminal (!12) of the decoder (DE 5)
-11 (by 1b'', lens < 1-, E)?
The data “01 (110101”) sent from
Through the command circuit (△N32) and the OR circuit (OR3),
In addition, the lens (1F) is attached directly to the camera body (BD).
is sent as is to the camera body and input.
Read from the power terminal <SDI> to the microcontroller (MC2)
. This check data indicates whether the interchangeable lens is attached.
The platform that is determined to be
Aperture control is performed using the exposure control device (E'XC).
. On the other hand, it is determined that no interchangeable lens is attached.
In this case, the aperture metering mode is set and aperture control is not performed.
It won't happen. The outputs of counters (Co5) and (CO9) are “'
0001”, the lens ROM (RO3) address is
The address “011-1” is specified and the ROM (RO
3>, open aperture ((α data AVO is output.
Oh, a zoom whose effective aperture value changes depending on the set focal length.
In the case of a lens, the aperture value is due to furl at the best focal length.
Output. In addition, the converter (CV) ROM (R
The converter (CV) is at address “1H” of O1).
A constant value that corresponds to the amount of change in the maximum aperture value of the lens due to attachment.
The value data β is stored and is transferred from ROM (RO1).
constant value data β is output. Decoder (DE5)
Terminal (gO) “l-1-1i” k: Twist, ROM
Data from (RO1) and (RO3> are added in series.
It is added by the arithmetic circuit (ALl>) and (A VO + β) is used for the sieve.
and this data is input to the AND circuit (AN30>, off-time
(OR3) I-interval is output. Counter (CO5
), (CO9) becomes "0010'", RO
M (RO3). (RO1) are each designated with address “02H”.
Ru. Minimum aperture data from lens ROM (RO3>)
From data A vmax and converter ROM (RO1)
With the data β, Av
If fflax+β data is not installed again
The data of A vmax is output. The outputs of counters (Co 5) and (Co 9) are "
0011 ” k: % Root, lens ROM (R
031-1” is specified.
, ROM (RO3>=41-) outputs the open photometry error data.
If the converter is not installed, this data remains unchanged.
Loaded into the camera body. On the other hand, converter (CV
) is installed, the decoder (D
The outputs of "5) are all "low", and the OR circuit (OR3) is "low".
) is “low” regardless of the data from the lens.
” will remain as it is, and the camera body will have a wide open metering error and “
Read the data of 0″. This is the converter CV
> By installing the , the open aperture becomes relatively small.
Therefore, the open photometry error is considered to be II (-) II.
This is because it is okay. The output of count (Co 5) and (Co 9) is “
oioo”, ROM (RO1), (R
O3) are each designated with an address of O=11-1".
Ru. Lens ROM (RO3) address ""041-1
”, the focus lens (F L ) is extended.
data indicating the rotational direction of the motor (MO) when
The exchange coefficient of interchangeable lenses changes depending on the set focal length.
Data 42--data indicating whether or not the model of the lens is used is stored. For example, when the motor is
Model in which the focusing lens extends when rotated in the direction
In the case of the lens, the least significant bit is '1'. , when the motor is rotated counterclockwise, the focus lever
If the lens is of a type that is fed out, the least significant bit is
It is “0”. Also, depending on the setting shooting path Iv1
For lenses with variable conversion coefficients, the least significant bit
is set to “1”, and the lowest bit is set to “1” for lenses that do not change.
The cut is '0''. This data is converted into a converter (
CV) is sent directly to the camera body regardless of whether it is attached.
Ru. When the output of the counter (Co 9) becomes ``0101''
The output of the decoder (DE9) is a lens with a fixed focal pressure of 111
゛00101'' for a zoom lens, ''10 for a zoom lens
01φ'', the lens circuit (LEC) ROM (
RO3) is “' 05 H” or “ 001 respectively.
* * * :l: * ” address is specified. Note that ' * * * * i: " is the code board (FCD
). This ad of ROM (RO3)
In the case of a fixed focal length lens, the fixed focal length of the lens is
+++02 f of the base 2 logarithm of the point pressure 1111 f
If the data corresponds to a zoom lens, the data corresponding to the zoom lens
lens setting focal path ivl f versus vI value log 2 f
The data corresponding to the camera is stored, and this data is
output to the main body. In addition, the converter's ROM (RO
1) has the address ``5H'' specified, and this
In the address, converter (CV) and camera body (BD
) and the interchangeable lens (+-E).
The data γ corresponding to a small change in focal length 1 is recorded.
It is remembered. At this time, the output terminal of the decoder (DE 5>
Since the child (gO) is “t-l right”
, focal length data log by addition circuit (AL 1)
,, The data obtained by adding constant value data γ to f is the camera
sent to the main body. This focal length is suitable for camera shake warnings.
Used for discrimination, etc. When the output of the counter (CO9) becomes “0110”, the
In the case of a lens, “10” is output from the decoder (DE9).
The data of 10φ°' is output and the terminal (h4) is
-1ight” and after that, the data selector (DS
Data from the input axis α2 of 1) is output. This is it
, ROM (RO3) is “010”4@ * * 1
: *” address is specified. This address has
, change the focal length of the zoom lens from the shortest focal length.
Change in aperture value from the effective aperture value at the shortest focal length when
The amount data ΔAV is stored according to the set focal length.
Ru. In addition, in the case of a fixed focal length lens, ΔΔV-0
Therefore, data “0” is written in address “06H”.
It is remembered. This data is used for converter (CV)
It is sent directly to the camera body regardless of whether it is worn or not. This data is obtained by removing the aperture component from the aperture metering data.
Calculation for (Bv-AVO-ΔAV)-AVO-
The effective aperture is controlled by ΔAV and the set or calculated aperture aperture.
It is used for the calculation △■-AVO-Δ△V for control. When the output of the counter (CO9) becomes '0111', the
In the case of a multi-lens, the output of the decoder (DE9> is “101”)
1φ", and ROM (RO3) is "'011 **
＊＊＊” address is specified.
Data KD of conversion coefficient 45- corresponding to the constant focal length is stored. In addition, fixed focus Wp
ROM (RO3) is "
The address 071-1' is specified, and this address has
Fixed conversion coefficient data KD is stored. Conversion staff
There is a built-in mechanical transmission mechanism that compensates for changes in the number of
If a converter is installed, this data will remain unchanged.
transmitted to the body. The data KD of this conversion coefficient is microcomputer<MCI).
Calculated defocus height 1ΔL l to 1ΔIIXK
The motor drive mechanism (L M D ) is calculated by calculating D.
It is used to read the data of the drive unit. 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 two parts and coded as shown in Table 6. Table 6 46- The conversion coefficient T-ta KD is KD=(k3・2+ to 2・2+ to 1・2−2l + 1(0・2) ・ 2 ・ 2m
-4・2 +5・2' +k (i・22 +7
・28 Determined by the performance of n-a constant value (for example, -7). In addition, k3 is the highest pitch 1 of the significant figure part.
, so it is always “1”. Therefore, this J
:If you use Una coding, the KO value can be in a very wide range.
Even if it changes in the microcontroller (MCI), it is easy to perform
How can you memorize data with such a large number of bits? Figure 7 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
g,, f, and the vertical axis corresponds to the conversion coefficient KL').
respond. By the way, KD becomes a straight line depending on the focal length f. It changes continuously as shown in B and C, but in this example,
In this case, as shown by the broken line △', [3', C', K
The value of D is set to a discrete value of 1 to 33. In this case, if K 1-2, K[)・-'01111000'',
-l -2~3-4 KD-''011011 when 2=2+2+2+2
11”, -1-2-3 K D = ” if K 3 = 2 + 2-1-2
01101110'', -I -2-4 to 4-2+24-2 K[)-'0110110
1”, 4-6 K 31-21-2 j matching K D = ” (101
01000'', 4-7 to 32 = 2 to 2 K E) = '' 0011100
1”, 5 to 33-2, K D = ” (10101000”
There's a lot of yelling. The focal length of the zoom lens is 5
It is divided into many areas corresponding to the output to Pitsu 1.
, for example, if the lens changes as the west line △, f17~f
It is divided into 25 9 zones. With this configuration, f
If the zone is 25, the smallest 1 in that zone.
The value closest to the value (17, f2 to the small data of 10
16 in the 4 zone, 1 in the f23 zone
5. In the f22 zone, the data 13 is output.
Ru. The reason for determining the value of KD in this way is that Jz
Ru. That is, set K[) to 110, which is larger than the actual data.
If you do this, you can drive the focusing lens until it reaches the in-focus position.
The encoder (E
NC) pulse number J: Rimo N = K D X1Δ1-
N obtained in step 1 is larger, and as a result, the focus position
The lens passes by, and the lens is tilted in front of and behind the in-focus position.
This is because it will result in Therefore, make KD smaller.
By setting the value in parentheses (), the camera will gradually approach the focus position from one direction
It's easy to read, and there's a difference between it and the actual KD.
Since the focus lens is designed to be as small as possible,
It is possible to shorten the time it takes for the
The difference between the value of K and D becomes too large and the focus position is reached.
Although it may happen that it may take a long time to
In order to shorten the time, zone f18 shown in B',
If the area is slightly thicker (like f12) than the actual value,
Focus a little (from f! position).
It may also be possible to repeat it. Also, if the shooting distance is infinite, the solid line C (flash) means close distance.
There is a G-1 lens whose conversion coefficient changes significantly depending on the shooting distance, as shown by the dashed line C (near).
. With this zoom lens, for example, the zone of focal length f1
The shooting distance is infinite f; 7- The nearest place from W'3
When the position changes to 4, K D = k 17 = 2-2hN
In this embodiment, in order to support KD=z,
Only the data of the conversion coefficients in the large-scale input device are stored in ROM (RO
3) and store it in the area near the focus range (hereinafter referred to as near focus).
Until reaching 1) shown in the zone, the positive and negative (strike) of △1-
, defocus direction)
When the lens enters the near focus zone, the above-mentioned K
Calculate the value of N by 1-1 to D and 1 -C
I am trying to drive the lens, but there is also a focal length control.
Board board (one for prefecture shadow distance llll11 set in addition to FCD>)
- Separate code boards are installed, and these code boards allow ROM (RO
3) Specify the address and convert the conversion coefficient data accurately)
However, the number of parts increases and the address
Problems such as an increase in the number of regular pins, an increase in ROM capacity, etc.
and is not practical. 50- Additionally, move the zoom ring from the shortest focal length position, for example.
By moving the lens to the short focal length side, macro photography can be performed.
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 we will explain it here.
omitted. ) For such zoom lenses, the actual
In this example, when switching to macro photography, the code board (FCD)
) will output data “11111” and the specific address will be
Make sure that the address “01111111” is specified.
Ru. In the case of macro photography, the position of the llI diameter may change,
The depth of focus becomes shallower, the aperture value becomes darker,
It is difficult to focus on 14 points in AF mode, so the ad
The data “φφφφ0110” is stored in the response.
3 is 0''.Microcomputer (MC2)
uses this data to determine that the camera has not switched to macro photography.
Separately, the AF mode is set by the switch (FAS).
Focus adjustment mode can be automatically set to display-only FA mode even if
Switch dynamically. Also, if you do not set the shooting distance to the closest position, the micro
A zoom lens that is configured so that it cannot be switched to shooting mode.
There is. With such lenses, it is difficult to switch to macro photography.
By the conversion operation, the swing-F- (MC8) in Fig. 5 becomes rJ1.
If the inverter (I
C AND circuit (A N 110) ~ (
All outputs of A N 44) become “' l-ow”
. This causes the ROM (1103) address "0"
1100000" is specified. The data of φφφφ0100" is specified at this address.
Ta ga ii'! It is remembered that the microcomputer (MCI) is this
Switch to macro photography with data 3 = k1 = O
It is determined that the operation has been performed and the prefectural mileage is automatically updated.
Rotate the motor (MO) so that it is in the
Maneuver the lens for the customer. The light receiving part for focus detection is the fixed exit pupil where the photographing lens is located.
Staring at J: The pupil diameter and light receiving element
(located at an optically equivalent position to the film surface)
Is the subject passing through the photographic lens depending on the position of the pupil?
It is determined whether the light receiving element receives the light from the light. Therefore
Depending on the lens, light may not enter some light receiving areas.
There are some things like that. Focus detection is not required for such lenses.
Since it is not reliable even if you use AF mode or FA mode
It is preferable not to perform this action. So a record like this
In the case of a lens, the ROM (RO3) address (zoom
For Mulens, “011* * * * i:”, fixed focus
If it is a point distance lens, it is '00000111°°).
Store the data of “φφ0001” as KD.
Icon (MC2) uses this data to achieve #1G as described below.
In step -2, the microcomputer (MCI) switches to AF mode.
to avoid performing focus detection operation in FA mode.
Ru. In addition, AND circuits (AN40) to (A
N44) to “ooooo” or “11111”
If data is output, the ROM (RO3) address
Response ``'00100000'', ``0011111
1” contains data corresponding to the focal length @f during macro photography.
, address “01000000”, “01011
111” contains data corresponding to ΔAV during macro photography.
are stored and output from ROM (RO3) respectively.
be done. In addition, in the case of an interchangeable lens that does not have a mechanism to transmit the rotation of the drive shaft in the camera body to the focus adjustment member 531,
As in the case of switching to macro photography, the parameter φφφφ is
0110" is stored, and only FA mode is possible.
be done. Furthermore, it is equipped with a transmission mechanism similar to the above-mentioned lens.
In the case of a converter without a counter (Co2),
When the output becomes '0111''', ROM (RO1
) outputs φφφφ0110”, and the decoder (
Only the terminal (ql) of DE 5) becomes “G110h”.
transmits data from ROM (RO1) to the camera body.
What kind of interchangeable lenses are installed?
Also, only the FAT-mode operation is performed. Connect the converter by inserting it between the camera body and the interchangeable lens.
When doing so, the focal length changes depending on the converter, so
The drive shaft from the camera body is increased by an amount corresponding to the increased portion.
It is necessary to provide a deceleration mechanism in the converter to reduce the amount of rotation.
There is a point. In other words, the amount of rotation of the drive shaft of the camera body remains unchanged.
Only the mechanism that transmits power to the focus lens drive shaft is controlled.
When preparing for a converter, the KD of the lens can be used as is on the camera.
=54- The drive of the camera body is transmitted to the body by N=KDX lΔL1.
When the axis of motion is rotated, the amount corresponds to the increase in focal length.
There is a problem that the lens may shift from the focused position. There
For converters that are not equipped with the above reduction mechanism,
In this embodiment, for example, a converter that increases the focal length by 1 or 4 times is used.
For converters, KD is 1/2, and for double converters, KO is
The top 4 bits of each KO are 1/4.
From several pieces of data (k7 to 6!1k4), 1.4 times
If it is a converter, destroy 1, and if it is a 2x converter, reduce 2.
I try to do that. Returning to Figure 5, the output of the counter (Co 5) is "10".
00”, the converter circuit (C
From the ROM (RO1) of the converter (CV)
The check mark “01010101” indicates that the
check data is output. At this time, the terminal (gl) of the decoder (DE5) is =゛+
-+ igl, +1, so check this
Data is lens circuit (1-EC) (7) ROM (R
O3) The AND circuit (AN3
1). Sent to the camera body (BD) via the OR circuit (OR3>)
It will be done. When the output of the counter (CO5) becomes “1001”, this
The light flux is limited due to the installation of a converter.
The aperture value data △v1 determined based on the rale is stored in the ROM.
(RO1) and output from AND circuit in the same way as above.
(8N31>, camera body via OR circuit (OR3)
sent to. This data AVI is microcontroller <MC2)
It is compared with the open aperture value data AVO+β. △vo
-+B<A When Vl, the photometric output is 13v~A
Since it is VI, (BV-AVI) ten △vl=l
"3VJ5 and the comparison stage number data AV - (AvO
β) is calculated. As described above, the lens (IF) and converter (
When the import of data from CV) is completed, the screen shown in Figure 3 will be displayed.
In the flowchart, the output of the photometric circuit (LMC)
△-D conversion is performed (#13), and this A-D conversion
The photometric output data is stored in the specified register (#
13). At step #15 (release flag RL F is 11
1 I+ is determined, and this flag is set to '1'.
If it is "0", go directly to step #28.
Go through steps 16 to #26 to step #28
Transition. Here, release flag R1 - "is, release
The switch (RL S ) is closed and #59 step
Camera exposure control when subsequent interrupt operations are performed
Flag set to "1" when I value is being calculated
It is. Furthermore, the exposure control value is calculated during this interrupt operation.
If it is determined in step #63 that the
Perform the above data import operation in steps from #5 onwards.
, if RL F = 1 in step #15, #1G
Focus detection using AF and FA modes in subsequent steps
Jump the flow of the exit movement and expose in step #28
After performing the calculation, go through step #30 and step #64 onwards.
Exposure control is performed in the next step. At step #1G, switch to ΔF 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 57-step, whether the lens is INIJed or not (#
161), t\ and position at the time of injection: 1: The conditions are accepted.
Whether it is connected to the optical part (#16-2), focus detection
Is light from the subject entering all light receiving areas?
No (#16-3), is the photometry switch open?
A determination of whether or not (#16-!i) is made sequentially. Here, the data “01010101” is entered.
(916-1), if the KD data is not
When 3~kO is ``0001°''(lI4'16-2
), the exit diameter of the lens is too small and the open aperture value is △VO
, AvO+β, △■0 ten ΔAV or Δ■! is a constant aperture
If the value [@5 (F5.6)) is greater than 8 VQ (#
16-3) both in ΔF mode and FA mode.
Since the focus detection operation is impossible, step #16-4 is performed.
The indication is that no focus detection operation is performed in the
After a warning is displayed on the control circuit <DSC), step #28
to the top. Also, the photometry switch (MFS) is open.
and (10) is "low'"(#1
6-5) Niha, F A Motonomino! Made by FIJ
Move to step #2B to do it for only 15 seconds
do. 58- Check data input, k3~kO≠”0001°°,
△VO, AVO+β, △vo+AV or AVI≦AV
C. (10), if both “patlight” are determined,
Proceed to step #17 and subsequent steps. In step #17, the output terminal <01) is "l-1"
igh u, and the microcontroller (MCI> is its input terminal
(N1) 'l-1ight' allows AF and FA modes to be set.
Starts focus detection operation using the code. In step #18
is the conversion coefficient data K read into the microcomputer (MC2)
Output D from the input/output capo (Ilo) to the data bus.
Then, the latch circuit (LA) latches it. This rack
The data latched by the circuit (LA) is sent to the microcomputer.
(MCI) is read in step No. 93 described below.
Ru. In step #19, the output of the counter (CO9) is “
Mounting based on the data read at 0100"
The conversion coefficient KD changes depending on the shooting distance.
Determine whether the lens is of the same model. Here, change
If the lens is a microcomputer (MC2) output terminal (03
), that is, the input terminal (i13) of the microcomputer (MCI>)
To 1ijl11, if the lens does not change, "' L
The microcomputer (MCI) will be replaced in this month.
For details, refer to N(1,192 to N O,1
As described in step 97, the imaging position is within the near focusing zone.
Whether t is present or whether the integration time is longer than a certain value.
Switches motor (MO) drive in F mode according to
I can do it. In step #22, the counter (CO9) is also '0'.
Format based on the data read when the
How to rotate the motor (MO> when feeding out the lens for scraps)
Determine the direction. Here, if the direction is clockwise, the microcontroller (M
e 2) output terminal (02), that is, the microcomputer (MCI)
Set the input terminal (i12) to "'l-1ight", and set the counterclockwise
If the direction is clockwise, set it to "low". Microcomputer (MC)
I) is the signal to this terminal (i12) and the differential 4-cass direction
The direction of rotation of the motor (MO) is determined by the signal. In step #25, the third of the conversion coefficient data KD is
By detecting whether the pi-day is “'1゛° or 0”
, attached converter (CV), lens (L F )
to determine whether focus adjustment operation using △F mode is possible.
do. At this time, if it is k3-1, F mode is possible, so
, set flag MFF to LL O+1 and step #28
to move to. On the other hand, if k3=0, ΔF mode is not possible.
So, set MFF to 11111, then switch (FAS
) selects either AF or “A” mode.
detect whether Here, F mode is selected.
If the input terminal (11) is "Hioh", the withdrawer
Even if the AF mode is set by
The display control circuit (DSC) indicates that the
Display a warning and move on to step #28.
. If the input terminal (11) is “LOW”, FA mode is also active.
Since it is already selected, go directly to step #28.
Transition. In step #28, in steps #5 to #14
Loaded set exposure control values, metering values, and data from the lens
Performs known exposure calculations based on the data, and calculates the exposure time and aperture.
Calculate the value data and set the flag LMF to "'1".
Ru. 61- At step #30, release flag RL F is “1”
Determine whether or not the
Return to the flow of exposure control operation, and when it is '0°', select #3
Move to step 1. In step #31, the output terminal
To change the child (08) to "'1" through 1
The inverter (IN8) is connected to the transistor (BT3) by
is made conductive, and the light emitting diode (L DIO) ~(l
Warning display by Dln) 13 Yohi liquid crystal display <D
The exposure control value is displayed using S P ). In step #33, the photometry switch (MES) is opened and closed.
Determine the condition. Here, the photometry switch (MES) is closed.
If (i 0 ) is "l-1-1i", then
155 seconds for timer interrupt 1 ~ data
Please set it in register TO for timer #34),
(#35) and enable timer interrupts (#35).
36) and return to step #2. In this case, (
10) is “H;gh” (photometering switch (MFS)
(remains closed), so move to step #3 immediately.
Then repeat the same operation as in ``i'' (before disabling interrupts). On the other hand, the photometry switch (YES) is open (10
) is 'l-0W++, then it becomes swing-7 ('△S).
Which mode is selected, 8F or FA?
Priced at ¥11 <937), based on data from lens
The mode determined in step #25 is determined (#38
) to be done. Here, the input terminal (11) is -'+-0W1
In step 1, “△ mode is selected (#37) or
△"Even if the mode is selected, the flag MFF is '1
” and the lens side is “△(-”)
Then, the process moves to step #40. 8 [Mode selected]
If the second MFF is 0°, the output terminal (01)
'low' (tt39) and the microcomputer (MCI)
) After stopping the operation, move on to Step 1 of #40.
Ru. In addition, in step #37, 93B, "△ mode is determined"
When the terminal (01) is
Proceed to step #40, and U1 of the microcomputer (MCI)
The work continues. In step #40, the open/close status of the switch (EES) is checked.
The exposure control mechanism has been fully charged and no C has been detected (
12) is "1-1-1i"("If there is, #47
Return to the initial state by moving to step C and then returning to the initial state
When the exposure control mechanism is completed,
T (f 2 ) is '1-ow''-r 1, #
Enable timer interrupts with 36 slots.
# Go back to step 2 and turn the metering switch (MIH8) on again.
) is opened and the input terminal (10) is "l-1+!IT
'' or there is a timer interrupt.
1 is subtracted (#45), and the content of Tc becomes ゛'0pa.
It is determined whether or not (#46). When TC≠0
If so, move to steps after lf5 and retrieve the
Performs movements such as public appearances, etc. At this time, [△[-
If so, terminal (01) is 'lligh°', so my
Con (MCI) [repeat the dream masterpiece for △] ノ, 8 [t
If it is - mode, the terminal (01) is set to "L" in step #39.
ow", so the operation of the microcontroller (MCi) is
It's stopped. On the other hand, when it becomes TC-0, it is an output terminal (OO). (01) and (08) are changed to 'l, ow'.
C, transistor (f3TI) and buffer (B F
), the power supply is stopped due to the microcontroller (M
CI) operation stop, power supply by transistor (BH3)
A stop will be made. Furthermore, the liquid crystal display section (DSP
> blank display, flag M "". After resetting 1-M", return to step #2.
Ru. To summarize the above operation, the photometry switch (YES) is opened.
While data is being created, the microcomputer (MCI)
) and the operation of exposure calculation 7 display are repeated. Next, when the photometry switch (ES) is opened,
When the code is off, the microcontroller (MCI) stops operating immediately.
41 works with data import, exposure calculation 9 display, 15
Repeatedly for seconds, "In △ mode, data acquisition,
FA fishing operation exposed oil cylinder by microcomputer (MCI). Displayed !l+ action is repeated for 15 seconds. Also, exposure control
If the charging of the mechanism is not completed, press the metering switch.
When (YES) is released, data is imported. Microcomputer (MC1) operation and exposure? Ii calculation 1 display movement 6
5- Immediately stop the production and cover. Na Jri, -FL# 16-4. #27-2 step
Even if a warning is displayed on the
If Tsuru disappears, cancel this warning J61, -me
It is necessary to transmit the data to the display control circuit (DSC).
(This is not the case in 4.).Next (Remove the release with the double exposure control mechanism fully charged.
This section explains the operation when the switch (Rl-S) is opened.
I will clarify. In this case, what should the microcontroller (MC2) do?
Go to step f-) and then t) immediately step #59.
These release interrupt operations are performed. First, there is an interrupt while reading data from 1nons.
In consideration of such a case, set the terminal (06) to "low".
Converter and lens circuit (CV C) (L E
C) into the rocket state 廿59), and connect the terminal (01).
low” and set my J1n (MCI>Niru Δ
[or "△mode CH"] Stop one operation (#60). Furthermore, set the output terminal (08) to "LOW" for warning.
Light emitting diode (IDIO) ~ (1,-1)ln)
Wi lit! T (#61), L/'J-su7766
− Set “1” to the group PIF (#62), and then
Determine whether flag LMF 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 ''011, the exposure control value can be calculated.
Since it is not completed, move on to steps after #5 and expose
The control value is calculated and the process moves to step #64. In step #64, the value calculated in step #28 is
Data of the number of refinement stages AV-△VO, AV-(Avo+
ΔAv ), Av − (Avo + β), AV − (A
VO+β+ΔAv> is output to the data bus (DB).
, a pulse for data acquisition is output from the output terminal (04)
(#65). This allows the exposure control device (FX
As the data on the number of refinement stages is imported into C)
, the exposure control mechanism's narrowing operation has started and the image has been captured.
When the aperture is narrowed down by the number of stops, the aperture stops working.
Complete. A certain amount of time has passed since the pulse output from the output terminal (04)
Then (#66), the calculated 1c exposure time data TV
is output to the data bus (DB) and output to the output terminal (05).
A pulse for data acquisition is output (#67, #
68). This pulse causes an exposure control tIl device (EXC
), the exposure time data is captured and the built-in
The mirror drive circuit starts the mirror up operation.
Ru. When the mirror up is completed, the shutter starts moving.
starts, and the count switch (CO8) opens.
The time counter corresponding to the exposure time data acquired by
start. When the count ends, shutter II
The running of the curtain has started, and the closing run has been completed. By lowering the mirror and opening the aperture, the switch (EES
) is closed. The microcomputer (MC2) closes this switch (EES).
and confirm that the input terminal (12) has become ')light'.
When it is determined (#69), the release flag (RLF) is reset.
Set it (#70) and close the photometry switch (YES).
and the input terminal (i 0 ) is 1"l-1ight
” (#71).Here, (10) is
If = -1-1Hghu, return to steps after #2.
The above-mentioned data import, microcomputer (MCI) operation,
Repeat the exposure calculation 1 display operation. On the other hand, step #71
If the metering switch (MES) is open in the input terminal
If (10) is ``YES'', proceed to steps after #47.
Migrate and set the microcontroller (MC2) to its initial state.
Return to step #2. Figures 8, 9, and 10 show the operation of the microcomputer (MCI).
FIG. Microcomputer (MCI)
The operations are roughly divided into the following three flows. The flow that starts with step No. 1 starts with the microcomputer (MC).
The main flow starts with the focusing operation command from 2).
-, COD (FLM) by control circuit (COT)
) starts operation (No. 8), determines whether the motor is rotating (
N O,10~N0.13) , CCU) best integration time
Operation when the longest integration time elapses (N 001
4-19), Detection of the final position of the focusing lens and
Measuring good integration time (NO, 35 to 44) = 69-1 Motor stop at end position and low = I during intrusion
Resumes rotation (NO, 43-48.51-67), My
Initial settings when the controller (MCI> stops operating) (NO, 2!
l~33), conversion of COD data at low brightness 1f1 (N
O, 78-80), defocus hanging and defocus
Direction calculation (N0081-91), F mode operation
Determining whether or not the lens is available (No, 92 to 6),
] Determination of trust (No, 100), AF mode
motor drive to the focus zone and focus determination (
N 00125-196) (Fig. 9), FA mode
Focus determination (NO, 240 to 261) (10th
Figure), operation at low contrast (No, 105-11
5,205-214), Macro Ken Akira at the closest shooting position
Motor drive for lenses that can be switched to (N 01
220-232) and the like are performed. N0170-76 No., control circuit (COT)?
C due to the COD integration completion signal to the terminal (it) of
Terminal interrupt for reading OD output data
It's a flow. Also, NO, 200 to 204 in FIG.
The step receives a coincidence signal from the counter FCC via the encoder 70-(IENC).
Counter interrupt that determines focus by outputting
This is a simple flow. Note that once pin interrupts are enabled,
Then, even if a counter interrupt signal is generated thereafter, the pin interrupt will not occur.
The counter interrupt will not be executed until after the interrupt operation is completed.
The priority order of interrupt operations for both is determined so that
Ru. Below, based on this flowchart, in this example
ru△F. “I will explain C1 work in Δ mode. First, the power is turned off in response to the opening of the power switch (MAS).
On-ret circuit (POR1) Karari set signal (Po
1) is output at t11, and this reset signal causes the microcontroller to
(MCI) is a reset operation from a specific address (No, 1)
Do the following. At step N092, switch (FAS)
is opened and the input terminal (i14) is ``High''.
determine whether the Here, (i14) is "
)-1r Qh If n, AF mode is selected.
Therefore, set the flag MOF to ``0'' and
w”, FA mode is selected, so flag M
Set OF to '1''. At step N045, the output terminal of the microcomputer (MC2)
The child (01) is 'l-1-1i', that is, the input terminal (ill)
Determine whether or not it is “l-1ight”.
Ru. Here, if the input terminal (ill) is 'low'
No, return to step 2 and repeat the above operation. It is determined that (ill) is “High”
When the output terminal (016) is set to " +-+ ioh
u (No, 6), through the inverter (INS)
] Pass through the Hella resistor (BT2) and connect the power line (V
Start power supply from F). Next, C0D(F L,
The longest integration time is stored in the register ITR for measuring the integration time of
Set fixed data C1 corresponding () between (No, 7>
. Next, from the output terminal (010)
Output the pulse (No, 8) and send it to the control circuit (COT).
CCr) (FLM) integral operation is started and interrupts are possible.
(No, 9), then move to No, 10 step.
go No, in steps 10 to 13, the motor (MO
) is rotating or not is sequentially determined. In other words, it is determined whether the first focus detection operation has been performed or not.
By flag FPF (No, 10), focus lens
The driving position of Z (E[) is the nearest or infinite end position.
The termination flag FNF determines whether or not it has reached (No,
11>, whether or not the drive position is within the focus zone
By focusing flag IFF (NO012>, switch (
FAS) shows which mode is selected.
Each is determined sequentially by the lag MOF (N0013).
It will be done. 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 A mode is selected, motor
- (MO) has stopped rotating, so No, 141 ME.
Move to the next step. In addition, focus detection after the 2nd time
The lens is in the end position 1 focusing zone.
If the target AF mode is not reached and Eyetsu AF mode is selected,
, the motor (MO) is rotating, so No, 35
Move on to the next step. Furthermore, the flag FPF is the first
The period during which the eye focus detection operation is performed is “1”, 2 times 7
3- ■ During subsequent operations, it becomes II OII, and the termination flag EN
F indicates the closest focus lens (FL) driving position.
(lFl or eyeless person level 16 and motor (M)
Even if O) is rotated more than that, the enloader (FNC)
As soon as the pulse is not output from II 1 II,
Focusing flannel j l F F is (nons is in the focusing zone)
If it is, it will be ``1'', and if it is off, it will be ``0''.
"1" is subtracted from the contents of the Moe register ITR (
No, 14), borrow 811 from this register ITR
Determine whether W appears (NO, 15)
. Here, if BoI'l -B RW is C・teii↑, then
Set 11 (') II to low brightness flag L l-F.
No. 18j, from the microcomputer (MC2) to the input terminal (i
11) to operate the microcontroller (MCI).
-1ight” signal is input.N
O, 19). (If ill> is N l-1ight 11, then No, 1
Return to step 4 and repeat this operation. Also, “l
-ow”, NO, move on to steps after 25.
After performing the return operation of 177'I- to the initial state, return to step N002.
and make sure that the input terminal (+11) becomes “)light” again.
have On the other hand, borrow BRW occurs at step N0115.
If it is determined that the longest integration time has elapsed,
and outputs a pulse to the output terminal (011) (No, 1
6) Force the integral operation of CCD (FLY) with L.
Stop it, set the low brightness flag LIF to 1'', and then
Interrupt enlightenment is output from (COT) to interrupt terminal (11)
have a In the steps after No. 35, first, register for timekeeping.
Data C2 is set in data TWR for a certain period of time (No, 35
), n (for example, 3) from the contents of l/register ITR.
Subtract it to determine whether Borrow BRW appears (
NO, 37). Here, borrow from register TTR
When BRW appears, the longest integration time elapses as described above.
No, move on to step 16.
to forcibly stop the integral operation of COD (FLY),
Control circuit (COT) with low brightness flag ILF set to "1"
An interrupt signal is input from the interrupt terminal (i[) to the interrupt terminal (i[). Also, if borrow BRW does not appear [J, low brightness flag L
Set LF to ``0'' and set ``1°'' from register TWR.
Pull it to determine whether Borrow BRW is out (
NO, 40). At this time, Borrow BRW must be played.
If so, the input terminal (ill>) is “)light”.
It is determined in step 41 whether or not this is the case. (il
If l) is -114i, l, 11, No, 3
Return to step 6 and if it is “low”, press N.
o, 2! Move to step i. Furthermore, CI/n >0
2, and the button was determined in step No. 37.
Until the low BRW comes out, No. 40 steps
Multiple borrows occur due to the determination of . No, if borrow f3RW comes out at step 40, en
Data counting the number of pulses from the coder (ENC)
Set [C1] to register ECD1, (No, 42)
, compare this setting data with the contents of register ECR2.
(NO, 43>. In addition, register ECR2 has that value.
The count data that was previously captured is set. Here, the contents of register ECR1ECR2 do not match.
If the lens does not move, check the register.
Set the contents of star ECR1 to register FCR2 (N 0
044) L, No, return to step 35. No, register ECR1 and ECR2 in step 43
If the contents match, the previously imported
The pulse count data from the encoder (ENC) has changed.
No, i.e. the lens does not move, it is at the closest position or at infinity.
This means that you have reached a great position. Therefore, this place
In this case, interrupts are disabled (No, 45) and the output terminal
Output pulse to (011) (NO, 46) l, teC
The integral operation of CD (FLY) is forcibly stopped and the output
Terminal (012). (013) together “L OW” (N (1,47)
to stop the rotation of the motor (MO>) and set the low contra
Determine whether the stop flag L CF is “1” (N
o, 48). Note that this flag 1-CF is set when the subject is low-coarse.
based on the output of COD (FLM).
If the defocus amount ΔL calculated by
When flags 77-1 to CF are 1101+, the termination flag FNF is set to "1".
1” (No, 49), NO, 27 in Figure 10
Move to step 0. No, with 270 steps
is whether the input terminal (+14) remains l-1iqh".
AF is determined when (+14) is ')-1ight''.
If the mode is still selected, continue to step No. 12.
Move to step. On the other hand, (+14) becomes 'low'.
flag FP if it has been switched to FA mode.
Set F to 11I and connect terminals (012) and (0
13) Turn the motor (MO) to “low”.
Stop and set flags LCF, LCF1, and LCF3 to “0”
After that, return to step N092. To summarize the above operation, the microcontroller (MC2)
In response to the focus detection operation command, COD integration is started,
Enables interrupts and starts counting the longest integration time.
let At this time, the motor (MO>) is not rotating.
For example, an interrupt signal is input while counting this longest integration time.
Wait until the longest time has elapsed; b Interrupt Gogo enters.
If no power is applied, the COD integration will be forcibly stopped and the division will be performed.
Including 78- Holds the 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 the end device during minute time counting?
While periodically determining whether the
In other words, no interrupt signal is input even after the longest integration time elapses, and
If the two lenses have reached the end ↑ [-1, the product of COD
Forcibly stop the minute and have an interrupt signal. Also, the lens
If reaches the terminal, interrupts are disabled and integration is forced.
stop the rotation of the motor (MO),
Again, do not miss the integrals of C and CD, J: sea urchin, Δ
1- is detected to determine whether or not it is in focus, and from then on the microcomputer
(MC2) to the input terminal (ill) of the microcontroller (MCI)
) even if a signal of "l-1ight '" is input to
The microcomputer (MCI) performs focus detection and focus adjustment.
However, this signal becomes “low” and the photometry switch is turned on again.
switch (MES) is opened and the input terminal (ill) is “H”.
When it becomes “high”, the operation from the step of N 0.2 is started.
Start. Now, the flag L-CF is 111 at step No, l.
If it is determined that it is 11, then 7 lag L CF
It is determined whether 1 is "1"' (NO,!i1
). Here, 1. CI- is "(')"? '-a
If so, set I-CFI to 11111 (NO, 52)
, NO, at the step of 60, the focusing direction flag F D
Determine whether P is "'1°°. Note that the flag LC
In F1, the lens position is significantly shifted from the in-focus position.
To determine whether you are in a state of stupidity]
Scan the 1 nons position where the last is 1 meter above the specified mark 1j
17 lag and flag FDF for
The previous bin) is "1", △1-<0
When the lens is extended (rear focus > ti, '“OII
This is the flag that becomes . In this case, if “[)” is 1′”
If ``O°'' is ``0'', the ``''11 parameter is reset, respectively.
input terminal (+12) is 111-1 igh ++
(No, 63.64). In other words, the direction of rotation of the motor when the lens is drawn out to a dimension lζ is determined.
Separately, in step N O, 63, (+12) is
1 iqh”, turn clockwise to extend the lens.
Must rotate r XN 0 , 66 steps
Shift to step and connect terminal (012) to “I Hiql,
Set 11° (013) to ``low''. (+12)
is 'l-owl+if et al., in order to extend the lens,
The motor (MO) must be rotated in the counter-chronological direction.
Therefore, move to step No. 65 and connect the terminal (012
) for “low”, (013) for “Hiqh”
Make it. Also, in step No. 64, (+12) is '
``1liql, +I, counterclockwise to retract the lens
Rotate the motor (MO) in the direction 1! I have to
So, No, I will move to 65 Stella 1. , (+12) is'
low”, to retract the lens, move in the direction of time.
Since the motor (MO) must be rotated at the same time, NO, 6
Move to step 6. Next, No, step 67
Now, set the terminal (014) to "Htoh" and set the motor (M
Rotate O) at high speed and move to step No. 270
do. NO, 7 lags in 51 steps 1. -CFl is 111
11, the contrast remains low.
Then, the nearest point 1 is reached, which means that the terminal position of infinite number has been reached.
, stop the motor (MO) (No. 53), and (+
11) becomes 'l-ow' (No, 55
), flag LCF, LCF 1. LCF 3 to 5゛0'
'' and return to step 8l- TNn, 2!i. Explain the series of operations when ℃, low contrast 1~
. l, zu, △[[- If the contrast is low, the output box
Outputs “101” to the output (01)0 and displays a warning.
(No, 10!i), then flag 1-CF is
It is possible to determine whether the flag is set to '1°. (NO, 107). Here, the flag l-CI- is set to 1.
Instead of °゛, this time I went to low contrast 1 for the first time.
If so, set the flag l−C ``, l CF=・3 to ゛1゛
' and (N o, 108, 109), N o,
The first operation (F P F = 1
) or not. Flag FPF is “o”
In the case of (, in the case of low contrast <
T<, there is a possibility that this measurement is an error.
, No. 280, and No. 270.
,271 steps and return to step NO,2.
, make the measurement again. At this point, the motor is
It is rotating towards the calculated value. In addition, the termination flag E N F is II 1 +1, No, 1
1Of7) steps to No, 2no steps
If the transition occurs, the rotation of the motor (MO) has stopped.
Therefore, when the input terminal (ill) becomes “LOW” (No.
, 281 > , flag LCF, LCF 3 to 0''
(No, 282) to NO, 25 and subsequent steps.
Initial 411 to stop the operation of the microcomputer (MCI) in the
Make settings. Also, the flag FPF is 111 in step No. 110.
If II determines that it is the first operation, the flag
Set FPF and LCF3 to 0” (No. 111, 113) and step No. 205.
Determine whether the defocus amount ΔL is positive or negative. Δshi〉0
If it is the front bin, set the flag FDF to °1゛, and if ΔL<O, it is the rear pin.
Set the flag FDF to 'O゛° N 0.206,2
09), similar to steps 63-66 of NO.
, rotation direction of the motor (MO) for exposing the lens 1"
Rotate the motor (MO) counterclockwise or clockwise depending on
Rotate it. Next, at the step of NO, 212, when integrating
(contents of register ITR) is shorter than the constant value C7
It is determined whether the integration time is less than a certain value ((ITR
＞≧07), set the terminal (014) to "")light"
The motor (MO) is driven at high speed as tj (No, 2
13) , the edge G whose integration time is above a certain value is connected to the terminal (
014) as “' l-ow” and the motor (MO)
Drive at low speed (No, 214 > , No, 270
Go back to step NO12 and measure again.
start the process. In this way, future measured values will be lower
The initially determined direction until the trust reaches f and r values.
Move Helens. 1 nons reaches one end position while the contrast remains low.
Then, at step No. 52, the flag ICFI is set to ``1''.
'' to reverse the direction of movement and repeat the measurement.
move the lens. Furthermore, while maintaining low contrast,
From one end to the other when reaching the end position of relaxation
The lens has been scanned, so step No. 55
and stop working. Muo, during this operation
If it is determined that the measured value is not low contrast, N
Move to step 04101 and defocus as described below.
Performs lens control operations based on quantity. Here, suddenly low
When the contrast is reached, take the first measurement as described above.
Ignore the fixed value and perform the measurement again.
If it is trust, flag LCF 3 is set to 1''.
(No oy112), set LCF3 to 0" and N
Move to step 00205, and based on the measured value at this time,
Then, the direction of lens movement is determined and the contrast is kept at a constant value.
Find a position that is more than that. In case of low contrast in FA mode (MOF=1)
, NO, step 106 to step No, 115.
Set the flag LCF to “1” and set the flag LCF to “1”.
1. Set LCF3 to "l Q II" and set flag FPF to "1".
, set the termination flag ENF to 0'', output terminal (012),
(013) as “l-ow”, No, 25B
Move to the step, perform the operations described below, and measure again.
Do the following. The microcomputer (MCI>) starts from steps N009 to 13.
No, 14.15.18.19 loop or No,
35~40.42~44 loop or No, 36~
While executing loop 41, COD (FLM
) is completed and the control circuit is connected to the interrupt terminal (it).
(COT) when l Higl, II pulses are input.
Then, the microcomputer 85- (MCI) jumps to step No. 70 and interrupts.
start the scanning operation. First, from the encoder (ENC)
The pulse count value ECD is stored in register ECR3.
is set (No. 70), the number of light receiving parts of COD, i.e.
is input to the input port (rPo) of the microcontroller (MCI).
The value C3 corresponding to the number of data is set in register DNR.
input terminal at the step of (No, 71) and No, 72.
A pulse of Hi Q i 11 is input to (ilO)
have a After the A/D conversion of COD output is completed, the input terminal
When (ilo) becomes “'Hillll”, the input point
One COD output data C input to the port (TPO)
D is set in register M (DNR>) (NO,
73). Next, 1” is subtracted from the contents of register DNR.
(No, 74>, borrow BR from this register DNR
No, steps 72 to 75 are repeated until W is output.
be done. In this way, the COD output data CD is sequentially
Set in register M (DNR). All CCO output data CD import is completed.
Then, set the return address, perform a return operation to that address, and return to step j140.77.
Then move on to the main flow of the next step. No. At step 77, it is determined whether the flag LIF is '1'' or not.
It is determined whether Here, if LLF is '1'', COD
Find the largest data MACD among the data CDs from
(N 097B). The top of this data MACD
If the bit is not “1”, the entire COD output data A
L CD is doubled (NO, 80>, and in 1
When u, the data that overflows when multiplied by 2
will appear, so move on to steps No and H. On the other hand, if the flag L L F is 0'', N 008 immediately
Move to step 1. 1'J O, in steps 81 and 90, respectively
In the plane equivalent to the film image: integer part of the shift amount of two images
and decimal part calculations are performed. In addition, these steps
A specific example of calculating the shift amount in the
Proposed in No. 333007 or JP-A-57-45510
However, since it is unrelated to the gist of the present invention, it will not be explained.
omitted. N O, in steps 82 to 85, the above
Similarly to Nos. 10 to 13, the motor (M
It is determined whether or not there is rotation of O). Here, the motor (MO
> is rotating, the pulse from IN]-da (ENC)
The count data ECD of the number of registers is set to 1 register ECR1.
imported (No, 86>, this data and No, 44
The contents of register FCR2 previously imported in step
are compared. If (ECR1) = (ECR2), l nons are at the end
This means that the above step No. 47 has been reached.
If (ECR1) 1-(ECR2), the lens reaches the end.
Since you have not done so, reset the contents of ECR1 to ECR2.
If the answer is No, proceed to step 89. On the other hand, the motor (
If the MO) is not rotating, immediately go to step No. 80.
It will move to the top. NO, at step 89, the input terminal (ill) is turned on.
1right”, and if it is “low”
No, stop the focus detection operation after the 25th step and
When the initial setting is done and it is “I-light”, it is N.
Move to step O, 90 and pass the decimal part of the shift amount.
Calculate with steps No. 81 and No. 0190.
The defocus lift ΔL is calculated based on the output lζ shift amount.
Issued (No, 91 >. If flag IFF 1 is “0” (N 00305),
No, steps 92 and subsequent steps are executed. NO,! 1
In step 2, the AF mode is determined by the flag MOF.
If it is in AF mode, select the step N0893.
If you are in FA mode, go to step 10.
Ru. In the case of ΔF mode, first the microcomputer (MC2)
Conversion coefficient K latched in the latch circuit (LA)
Take in D from the input boat (rPl) (No, 03>
, in this data, 3 is II O11 and 2 is II 1
II or not (NO, 94). here
, h3-0 and 2-1, as mentioned above, the
Since the interchangeable lens cannot operate in F mode, the mode
Set flag MOF to "1" (FA mode) and j', io
, the process moves to step 96. On the other hand, k3-1 or
If it is 2-0, an interchangeable lens capable of AF mode is installed.
Therefore, move to step 100.
Zuru. Furthermore, in step No. 96, it is determined whether 89- is 1-0, and if kl-1, No. 1 is determined.
Move to step 00. If k1=o, as mentioned above, the lens is
If the lens is equipped with a lens that cannot be switched to macro photography unless the
The user is wearing a camera and is trying to switch to Mac [1 shooting].
It turns out. At this time, go to step N 00220.
Then, set the output terminal (014) to ``1-Noh''.
Rotate the motor (MO) at high speed, then connect the input terminal (
i12) is F~! Determine whether ish 11 (N
(1,221). Here, (i12) is ll H1g1
If 111, time n] by rotating in the force direction, the lever is
Connect the output terminal (012) from which the lenses are fed out.
i(1+1", or "low" means counterclockwise cutting direction.
Since it is paid out by rotating it, (013) is “
'l-1ill)', then the encoder
Take the pulse count data ECD to register ECR2.
(No, 224). Next, set the fixed time data C8 in register TWR.
(No, 225), the contents of this register TWR
Subtract "1" from ``1'' and get a borrow [Repeat the operation of determining whether 3RW has been made or not, and after a certain period of time have passed, get a borrow.
When BRW appears, the pulse count data from the encoder
Load data ECD into register ECR1 (N 0022
8). Next, the contents of registers ECR1 and E(12) are
Check whether they match (No, 229), (
When ECR1)≠(ECR2), the contents of ECR1 are
Set to CR2 (NO, 230) and No, 225~2
Repeat 30 steps. On the other hand, (ECR1) = (
ECR2), the lens has reached the closest image.
output terminal (012). Set (013) to "low" and turn on the motor (MO).
Stop (No, 231) and set the flag FPF to 1''
(No, 232), No, return to step 2.
Ru. 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. Furthermore, this step
A specific example will be described later based on FIG. Here, if the low contrast is 1, the above-mentioned N O, 10
Proceed to step 5 and subsequent steps. On the other hand, with low contrast
If not, flag 1-CF is set at step N00101.
Determine whether or not is "0".Here, L CF is
If “1”, the previous measurement value is low contrast [-
So, 7 lag FPF is °1”', flag LCF, LCF
1. l CF 3 as 0°', N O, 290
The process moves to step and refers to the mode flag MOF. M
OF = Output terminal (012) if O-hitting AF mode
(013) as “l-ow” and motor (MO)
After stopping, return to step No. 2 and measure again.
Let it happen. If it is MOF-1, that is, FA mode,
Move to step N00240 and start the FA mode described later.
Perform the following actions. No, 101 step e flag l-CF = O before
If the measured value is not low contrast, No, 10
4, the mode flag MOF is successfully lit, and MOF is "b", that is, F.
If it is A mode, No, go to step 240, MOF
If it is “OII”, that is, ΔF mode, the step of NO, 125
Move to step. NO, in steps 125 to 130, defocus
The suspension △L is within the focusing zone ZN 1.
A determination operation is performed to determine whether or not this is the case. First, the lens is
The position has not been reached and the flag ENF is 11011 (
No. 125) Once the focus zone has been reached, the camera is in focus.
Flag IFF is '''1'° (NO, 126)
In this case, the current measured value lΔL1 and ZN 1 are 1'J
Compare in steps of 0.127. Here, 1△Ll<
If it is ZNl, the focus will be displayed (No, 128 >,
Lag IFF 1 to '1'' (No, 300), 2nd
The output terminal (030> of the microcomputer (MCI) in the figure is = H
igh II (NO, 301). This output terminal (0, 30> is the input of the microcomputer (MC2)
It is connected to the terminal (i5), and the microcontroller (MC2) is
By setting the input terminal (i5) to “High”, the lens
determines that the camera has reached the in-focus position. Next, the microcomputer (MCI) goes to step 270.
If it has not changed to FA mode, leave it as N.
Return to step 002 and measure again. On the other hand, at step No. 127, 1Δl−1≧ZN 1
If so, No, go through step 130 and set the flag FPF.
“1111, flag IFF as #OII, No, 1
3593- Move to step 3593- and defocus based on the current measurement value.
A lens control operation is performed using the lens. Also, the lens has reached the end and the flag ENF is 1'.
”, and 1Δ!-1≧Z with NO, 127 steps
If N is 1, the previous defocus h direction will be displayed.
, the process moves to step No. 129, and the input terminal (i
ll) becomes “'Low” and then No
, 25, and the operation is stopped. Here 1
18 [1≧7N If 1, the previous defocus direction
If you leave the screen displayed, if you say No, you will move to step 129.
In this case, even if the lens is at the terminal position n, it will not be in focus, and ■
It is useless to control the rear motor (MO) at 4T, so the microcomputer
(Forcibly stop the operation of MCI>. Make sure that the lens has not reached the end position or the focus zone.
If it is determined in step No, 125.126,
, firstly No, first pass flag in step 131
It is determined whether the flag FPF is "1". Here, if the flag FPF is "0", the above-mentioned No.
Similar to steps 6 to 88, when the lens reaches the end 94-? tl y++ operation is performed (N
t'), 132・~134), then No, 13! i's
Then move on to step 1, and also say ``1)''.
If no, proceed to step 135. ,N O,13
! In the 'i step, focus detection from the microcomputer (MC2)
The output command signal is determined and the input terminal (ill) is set to '1.
ow", return to step I'40.25 and perform the operation.
Stop, and the ``l-i igh'' mark is No, 136
Move to the next step. No. In step 136, the calculated defocus
Multiply the suspension Δ (by the read conversion factor @Kn, and then calculate the lens drive.
The data N of the drive amount of the moving mechanism (L D R> is sieved,
At step NO, 137 again, flag FPF becomes 1'°
Determine whether or not. Here, the flag F P F is '1
”, first, it is determined whether N is positive or negative (No, 1
40 >, if positive, focus direction 7 lag 11) "" 1
”, if it is 0, then after setting it to O゛′, the absolute value of the drive amount N becomes N
m and is set in register ECR4 (No, 144
>, the flag FPF is set to "O" and the step of NO, 166
Move to step. On the other hand, at step No. 137, the flag F P F is set to "
(“l” r atl,” 611 times of drive amount)
The contents of FOR4 are the lenses for which -11 is stored in j.
Register “QR!i” (No, 150),
Instead of this one samurai white -Ln]] -ge (f-N C)
The force run of the pulse from Cf, ) is l nozzle.
It is taken up into Ta1FcR4 (No, 1!i1). Immediately
Well, ECR1+ has the count of the COD integral Hiiragi Ryomoe point.
Data l'c1 is 1:('';R4 (J this 0 temple point r
I'm surprised that ``F-YTc2'' is set.
. Next, one node in the 191 interval required for the integration of CC[)
1jl suspension τ−=”l Co−T−cl is N
In order to use the
The amount of movement to=T ci-T-c2 is excluded. Kogu
, N is 11 in the intermediate A device between the CCD integration 110.
At this point, N of the lens is 19.
Moved by 7・' 2-+-to from '1 point'
ing. Also, from the N'l11 obtained on the previous 7 days, the lens
Data N"m = N'm-τ corrected for the amount of movement τ"-to
-to is locked out. Furthermore, this data N”m is Ipi (
It is positive. j'Jo, differential 4-car in 155-157 ST2
The focusing direction is reversed by the correct 1 of the standard N and the flag FDF.
It is determined whether or not it was done. First, Nlo, 1! i! i's
In step step, the differential A-cus ff1. N
It is determined whether N is positive or not, and if N is positive, a flag FDP is set.
= 0 is determined (No, 156). Koto
The direction of FDP-0 was reversed, so No. 1
Move to step 58 and if FDP = 1, it will not be reversed.
Therefore, move to the step with N 0.159. On the other hand, if N is negative, F r) F = 1 doesn't matter.
It is determined (No, 157), FDP = 1, and the reverse occurs.
Therefore, move to step No. 15B, and
If D F = O, it is not reversed, so NO, 15
Move to step 9. When the direction is not reversed,
That is, in step NO, 159, the rotation of the motor
is approaching the in-focus position, so in the middle of the integration period N
Assuming that the value of is obtained, lNl-τ/2-to=N'
The amount of movement due to motor rotation is corrected by calculating
Then, it is determined whether this N′ is negative or not (N o,
160 >, here T", N'< O, then change the focus position.
Since it has passed, IN'l=N' Doshi97- te l"JO, move to step 164, and N'?・0
4 works and NO, 161 steps, 1 work by last time
The average of the data N"m and N'(N"m (-
N')/2=Na (N(1,161), this
Add 1-ta Na to N+Il (No, 1fi2
>, No, move to step 16F+4. When the direction is reversed 1), that is, the step NO, 158
GJ at the top, τ/ from the time when the current data was 19
'2-1 ~ to focus in the current defocus direction;
1 Since it is far from the reed, INI+τ/2+to=
Since the correction calculation of N' is not performed, the step of NO, 164 is
move to f'J o, N at step 164
"Average of m and N'(N"m - N')/2=
Na is calculated, and next (whether the average value Na here is negative or not is
Distinguished (No, 1 (i5). Here, Na >O'Ji' et al.) Book No. 162 No.
Move to Su-y tube, and if Na<0, terminal (012)
, set (013) to "l OW" and set -r'-II-ta
(N(1,174), focus zone
The data 7N1 is multiplied by the conversion coefficient KD to determine the focus zone.
The data Ni of the 1' kneader rotation amount 98- of the engine is calculated (NO, 175). Next, 1N
It is determined whether al<Ni (No,
176), if l Na l < Ni, then the focusing zone
Since the camera is in focus mode, set the focus flag IFF to 1'.
No, step 270, then step No, 2
to move to. On the other hand, if 1Nal>Ni, the focusing zone will pass through.
It turned out that it was too much, so I set the flag FPF to "1" and did the same.
Step No. 270 and step No. 002
, and redo the measurement operation. 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, at the step NO, 167, the near focus zone value ZN
Calculation of phi = ZN 1xKD from 1 and KD
and obtain data N of the amount of lens drive in the in-focus zone.
i is calculated (N 08167), and the ratio of Nm and Nn is
Compare ft, le (No, 168). Coco"'C1N1
If 1≧p4n, that is, outside the near focus zone, NO, 181
Proceed to the step , and connect the terminal (014) to "'l-1-
1i", rotate the motor (MO) at high speed and
Pulse from coder (ENC) is down-run 1~
Set N11l-Nn in the counter ECC for (N
o, 182), No, move to step 185
. On the other hand, Nm〈No, that is, it is determined that it is within the near focus zone.
If so, No, at step 160, is N11l<Ni?
determine whether Here, if it is Ni over Nm, it is close
Even if it is within the focus zone, it is not within the focus zone.
, connect the output terminal (014) to the motor
- (Slow down the rotation speed of MO> No, IB3)
, Nm is set in the counter ECC (No, 184
), NO, the process moves to step 185. In the case of a lens whose KD changes depending on the shooting distance,
If it is not in the in-focus zone, the signal in the defocus direction will
Lens control is performed only when
When calculating, calculate the amount of lens movement from NO, 150.
Since correction is performed, the No.
, at step 182, the N11l-N port is the counter EC.
Ck: Set. Also, if N11l <Ni, output
Set power terminals (012) and (013) to LOW.
Stop the motor (MO) (NO, 171) and focus
Set flag IFF to '1' (NO, 172), counter
Disable printer interrupts (No, 173), No,
Return to step 270 and take measurements for reconfirmation.
. Now, in step N00185, the flag FDP is 11.
111 is determined. Here, FDP is 111
If it is II, it is the front pin, so it is the output port (OPO)” 10
0” and lights up the light emitting diode (LDO).
Display the front pin (No, 186), 11011 etc.
Since it is a rear pin, set “OO1” to the output port (OPO).
Output and light up the light emitting diode (LD2) and then pin
Display is performed (No, 189). Next, the contents of this flag FDP and the input terminal (i12) are
The motor (MO
> clockwise or counterclockwise (No. 18
8,191), move to step No.192
, check whether the input terminal (i13) is “High II”
Discern. Here, the conversion coefficient changes depending on the shooting distance.
(i13) is equipped with an interchangeable lens.
gh”, No, and in step 193 it is determined whether 101-Nllll <Nn.
If it is outside the zone and N11l≧Nn, the above N
o, Step 182 immediately followed by Step No. 185.
As seen in the shift to the
How to rotate the motor (MO) only according to the direction No. 451
Decide on the direction and rotate. Next, the integral time corresponds to 07.
No, 194
), at good times the lens may go too far at the focus position.
Please set the terminal (014) to 'L-OW'.
and drive the motor (MO> at low speed CNo. 195)
, making counter interrupts impossible (NO, 196),
NO, 27 (Go to step No. 2 after going through step l)
return. On the other hand, in step No. 193, Nm<NO.
When it is determined that the object is in the near focus zone
allows counter interrupts just like regular interchangeable lenses.
In 1) (No, 197), the step of NO, 270
Return to page. Also, the input terminal (i13) is “L OW”
Counter interrupt is also possible in case of 1 no, 270
Go back to step. Now, the counter ECC counts the pulses from the encoder 102- (ENC) while the motor (MO) is rotating.
When the content of becomes 0'', it becomes a counter interrupt and N00
At step 200, it is determined whether N11l < Nn.
It will be done. Here, if Null <Nn, the near focus zone
The focus zone that was rotating the motor <MO) when
This means that the output terminal (012), (
013) to “LOW” Toshi T motor (MO) rotation
(NO, 203) and set the focus flag (IFF).
> to 1"' and return to step 270.
On the other hand, if Nll1≧Nn, it means that the near focus zone has been reached.
Therefore, the output terminal (Q14) is set to “' low”.
Set the motor to low speed (No, 201) and counter Nn.
Interrupt after setting (No, 202)
Return to the number you called. Next, in step No. 104 or No. 290
When it is determined that the flag MOF is ``1'', N
FA mode operation is performed in steps of 0,240 or more.
be exposed. First, in step 240, the flag FP
It is determined whether F is 11111 or not. Here, FPF
If is '1'', it is possible to operate in FA mode for the first time.
Therefore, in case you change from ΔF mode,
Set the edge flag ENF to IQ 11, and set the focus flag IFF to ″
°0 pad, in-focus zone in register IZR for in-focus zone determination
Set the γ-taper ZN2 for the turn. Furthermore, this data ZN
2 is larger than the data ZN 1 at ΔF'E-do
It's certain. This is the motor when in ΔF mode.
- The lens position can be adjusted with high precision by driving.
However, if you are in Δ mode, you can manually adjust the lens position.
Because the motor drive is very difficult to adjust which yi pox is good
It is et al. Next, in step No. 245, Firth
Set Topasfuranono FPF to “0” and set No. 246.
Cover the transition step. On the other hand, the flag FPF is 1101+
If so, immediately proceed to step NO, 246. At step NO, 246, the focus flag TFF is set to "
1” is determined.Here, the flag TFF is
If it is 11111, the calculated value up to the previous time is in the focus zone.
Therefore, the previous Azusa output value ΔIn-1 and the current calculated value
Δ1− which average value, i.e. Δ1−n=(Δ[−+Δ1n−
1)/2 performances were held <NO, 247), Regis
ZW (＞ZN
2) is set (N 0024B ), then NO,
Move to step 250. This applies to each measurement value.
There are variations in the focus, and once it is within the focus zone, the
The probability of being determined to be in focus by expanding the width of the
high, when the lens position is near the boundary of the focusing zone.
This is to prevent flickering of the display. On the other hand, No. 2
The focus flag IFF is II OII at the 4G step.
If so, let the current measurement value Δ be Δ"n, No, 249)
, No. Move to step 250. No, 1ΔI−n l <
(I ZR), i.e. whether the calculated value is within the focus zone.
Determine if it is a fish. Here it is determined that it is within the in-focus zone.
When the focus flag TFF is set to '1'', N 01
251), focusing table using light emitting diode (LD 1)
Show (N o, 252 ), N 0025B
Move to the next step. On the other hand, being outside the focus zone
When Δ1. It is determined whether n > Q.
(N O, 253), if △I-n > O, the light emitting diode
105- by the code (+-Do), if ΔIn<Q then (1-I)2) J:
Performs rear bin display. Next, set the focus flag 1FF to 110
1+, set data ZN 2 to +7R, and set No
, move to step 258. No, 258 steps
The top is the input terminal (i14> is ``lligh'')
Distinguish ``l-1igl+'' to F7-
If it has been switched, the flag ``PF'' is set to ``1'' and IFF is set to ``1''.
II 011゜L Set CF to °0° and start N092.
To the tip, "low'"e" remains in △ mode.
If so, go back to step 2 and take the next measurement.
Do the following. In the steps after NO, 25, the AF and FA models are
Stopping the focus detection operation and setting the initial state by
41 works will be made. First, interrupts are disabled (No, 2
5) Output a pulse to the terminal (011) and calculate the product of CCO.
The minute operation is strongly stopped (NO, 26), and the end
Let children (012) and (013) be ``low''.
The motor (MO) is stopped and
Output boat (OP O), (OP 5) to ″00
0 “Why are the light emitting diodes <LDO) to (LD5)
The light is turned off (No. 28), and the terminal (016) is connected to 'l-
ow” Why? ffff Power supply from the source 106- line (VF) is stopped, and the terminal (03
0) as 'Low' and the microcomputer (MC2) of the focusing signal.
transmission to is stopped (No, 32). Also, 77
GENF, IFF, IFF 1,1-CF 3 to 110
1+, II II II is set in the flag FPF<
NO, 29-31.33). In this way, my
controller (MCI) stops operating or switches to FA mode.
N082 after the initial settings for when
Go back to step. Now, as mentioned above, at step No. 127, the lens
After determining that the lens has reached the in-focus position, step N002 is activated.
When returning to the program and taking measurements again, the flag IFF is set to 11.
1 II, so go through the same flow as when checking focus.
Then you get to step NO, 91. Between step No. 91 and step No. 92
There is a step to determine whether the flag IFF 1 is “1”.
A step (No, 305) is provided, and a flag IF
If F 1 is “0”, NO, go to step 92, 11
1 II, NO, move to step 306. N
O, at step 306, flag 1F [1 becomes 1''
Therefore, in step N, 306, the input port (
Read data from TP2). Here, # in Figure 3
Between step 30 and step #31 l;1:,
A step that outputs the aperture value AV for n output control from the I210 port.
Step #80 is set (-), and this comparison (direct is the default).
Pulse from output terminal (an+2) of coder (DEC)
is latched by the latch circuit (+-AI). Therefore
, the input capo-1'-(rP2) contains the aperture value data for exposure control.
data is entered. The read data AV is converted to FNO, (NO,
307), No, ΔD−δ×FN in step 308
The performance of O. is performed. Here, δ is the diameter of the allowable blur
1g11△[), which corresponds to , is a value that corresponds to the depth of focus.
Ru. Next, in this flow, No, in step 91
1q defocus amount 18L1 and 80 are NO,
It is compared in step 309 and goes through the focus status display below.
Then, the process moves to step NO, 270. Here, if 1△L1≦△D, the object measured at that time
The part of the object will be within the depth of focus and the output boat
Output a signal of '010' to (OP 5) and
The focus is displayed by lighting up the light emitting diode (LD 4).
be called. On the other hand, if l△[1>ΔD, is Δ[ positive?
Depending on the negative, put out ``100'' for each (OP5).
Press to turn on the light emitting diode (103) and display the front bin.
is displayed, or outputs “OO1” and emits light.
The diode (ID!i) is lit to display the rear bin.
be exposed. If you perform this kind of operation, the AF mode
After the lens reaches the in-focus position with
The area other than the area that was measured to drive up to
whether it is within the point depth, or whether it is the previous bin or the back bin.
It has the effect of being very easy to use, such as being able to reach a distance of 1 meter.
come. Note that the exact depth of focus can be determined in step NO.3011.
However, due to camera shake, the measurement position may not be the subject.
It is difficult to precisely match the desired part of the
, △L also varies (so, in the case of the FA mode mentioned above)
You can widen the focus zone width in the same way as when focusing on
After entering the focus scene, you can widen the focus scene [11] and process the average value of the calculated data several times.
You may increase me by doing 1). For example, to widen the focus zone [1], 80 = 1 x δ
It is sufficient to perform the calculation of xFNo (l = 2 to 3). Also, if this microcontroller (Me 1> stops working)
Initial setting, [First time when switching to △ mode! ■Settings
Therefore, step No. 33 and step No. 273
The following steps are performed between the step and step NO12.
It has been inserted. In other words, the flag IFF 1 is set to “0”.
No, 274), 0 for output capo-1~(OP5)
Light emitting diode (l D 3) with output 00'''
, (+-D 4) II-D (1-D 5) is turned off.
Set (NO, 275), output terminal (030>' l-
ow” (N 0.276). Also, even after the photometry switch (MES) is released, the
In order to perform the display operation of the modified example for a certain period of time, #3
An input terminal (I) is connected between step #8 and step #39.
A step (#81) to determine the state of 5) is inserted.
There is. That is, the photometry switch (MES) is opened and the
Even if it is determined that the mode is 110-, the input terminal (i5) is “tl ir+h
” and the microcontroller (MC1') is at the depth of focus mentioned above.
If you are performing an operation to determine whether the output is within the
power terminal ((11) should not be “l-ow” but “” l-
1ir+h". Figure 11 shows the control circuit (Fl-, M) of the CCD (Fl-, M) in Figure 2.
FIG. 2 is a dimensional circuit diagram showing a specific example of COT>. Counter (CO
24) is the black pulse (from the counter (CO22))
Color the falling edge of the pulse (DP2) obtained by dividing the frequency of CP).
The output signal (pO24) of this counter (CO24) is
) to (p4), the decoder (DF20) outputs
If l(i, l, l= of children (1-0) to (T9)
Overrides the output of the signal. The output of this counter (CO24) and
, decoder (r) F20) output and flip 70
(FF22), (FF24) (FF26)
, (F F2O) and the Q output are shown in Table 7. (Left below) 111- As is clear from Table 7, flip-flop (FF
The Q output (φ 1) of 26) is the output of the counter (C024).
“High” when the power is “11101” to “00101”
, the Q output (φ2) of the flip-flop (FF24) is “
'Htgh' between '00100' and '1 (1111')
, the Q output (φ3) of the flip-flop (FF22) is ″
Between “10110” and “11110”
, I=. This output signal (φ1)s(φ2), (
φ3) is supplied with power from the power line (VF)
is applied to the inter-cod (FLM), and the analog
Log signal transfer is constant. Note that this operation
This also drains the accumulated charge remaining in the transfer gate.
It is done. Power-on reset circuit (PO
Flip 70 by the reset signal (PO2) from R2)
Tsubu (FF20) ~ (FF28). (FF32>, C flip-flop (DF20). (DF22), (DF24), counter (CO
20). (CO22) and (CO24) are reset. difference
Additionally, a flip-flop (F F 30) is set.
Then the Q output becomes "+-+ igh +1. This output
The analog switch (△S2) is activated by the signal <φR).
The output potential of the constant voltage source (Vrl) is connected to the signal line (ANB
) to CC[)(FLM>, and to this potential
The charge storage section of COD (FI M>) is set.
Ru. Integral motion from the output terminal (010) of the microcomputer (Me 1)
A 'High' pulse is output to start the operation.
When the
Flip 70 knob (F F 30) is set to reset 1
The child (φR) becomes “L o*°′. By this,
COD (FLY)G Charge according to the light receiving part of each light receiving part
start accumulating. Also, via the inverter (IN50)
Then, the analog switch (△S1) becomes conductive, and COD
The monitor output is sent from the terminal (ANB) to the comparator (A
Input to C1) terminal. edge depending on charge accumulation
Is the COD monitor output from the child (ANB) at potential Vr1?
When the potential of the constant voltage source (Vr2) is reached,
, the output of the comparator (AC1) is “'l-1-1i”
to be reversed. This completes the accumulation of CCD (FLM).
It is detected that the process has been completed. This inversion creates a one-shot circuit.
(OS 10) outputs a “thigh” pulse.
, a flip-flop (F
F20) is set. “High I” of this Q output
At the rising edge of the I-fold signal and terminal (φ1), the C flip-flop
is taken into the drop (DF20), and its Q output “High”
l, II reset the counter (CO20).
The AND circuit (ANB0), (ANB
4) , <, AN66) , (ANB8) is
becomes enabled. After the terminal (φ1) rises to -Higl, IT
, when the terminal (TO) becomes “l @ i o i 11
7 lip 70 knob (FF28) is "H" of terminal (TO)
is set by “High” on the terminal (T1).
This Q output is reset by the AND circuit (
“Hi, hII” from the terminal (φT) via ANB8)
This signal is sent to the COD (FLM) as a pulse.
The accumulated charge is transferred to the transfer gate. Furthermore, this (φT
) signal is sent to the interrupt-115 terminal (it> of the microcomputer (MCI), and the microcomputer (MCI> is sent to the above-mentioned C
Performs an operation to take in the output data of C[) (FLY). When this terminal (φT) falls to j-L 0W-1, the
Flip 70 through the shot circuit (OS 16)
(FF32) is set, and its Q output is set to ``low''.
”, the gate of the AND circuit (ANB8) is closed.
From then on, the flip flop [from the Q output of 1 tube (FF2g)'
l-1iah” signal is not output.
shot circuit (OS 16), OR circuit (OR32)
The C flip-flop (FF30> is set through the
and set the terminal (φR) to “Hiqh”. COD by transfer signals (φ1), (φ2), (φ3)
Accumulated charge from (FLM) is sequentially output from terminal (AOT)
However, this charge is expressed as (φ2) is °')−1ig
Therefore, the C flip-flop
When the Q output of DF20 becomes “High”,
During the period when (φ2) is “@ight”
The signal (φS) for the 116-rimple bold is connected to the AND circuit (A
N66) and 1-4i0h” of terminal (T5).
The signal (φA) for starting conversion (A-1”) is connected to the AND circuit (
8N64). Mata, from COD (FI M) 17) terminal (AoT)
The accumulated charge signal sent first is offset adjusted.
After repeated use, only the charge corresponding to the leakage of the light receiving part is accumulated.
output voltage of (Vrl).
It is equal to the rank. At this time, D flip 70 knobs (
Since the Q output of DF24) is "'day high"
, the sample and hold signal (φS) is connected to an AND circuit (AN
70) to the sample hold circuit (81-11)
and the potential for offset adjustment is COD (FLM
) to the sample hold circuit (AoT) via the terminal (AoT).
St-41). First sample hold supply
Due to the fall of @(φS), the D flip-flop (D
The Q output of F24) becomes 'l-1tgh', and the following
The latter 4-no-1 pull hold signal (φS) is an AND circuit (
AN72) to the sample hold circuit (St~12
), and the potential corresponding to the amount of light received thereafter is the sample
The data are sequentially stored in the hold circuit (81-12). Q output of D flip-flop (DF20) is “High”
i'', the signal of (φ3) is passed through the AND circuit (8N6
0) to one input terminal of the AND circuit (△N62)
given to. D at the first fall of the mouth (φ 3)
Q output of flip-flop (DF22) is 'l-1i0
h”, so the pulse signal of (φ3) after the second time is
The microcomputer (MCI>) is connected via the AND circuit (ΔN62).
It is given to the input terminal (ilo) and the microcomputer (MC'I)
command to import data to the input port (IPO).
It becomes a signal. Here, D flip-flop (D F
20) Q output becomes “@igh” and the first
Undo the (φ3) pulse from the hold circuit (AN60).
I am trying not to output it from the code circuit (△N62).
is the data from the first CCI) (FLY) as described above.
This is because the data is used for offset adjustment. Also,(
The signal of φ3) is the clock input of the counter (CO20)
It is also given to the terminal, and the counter (CO20) is
"l-1tg" of Q output of lip 70 tube (DF20)
h”, the reset state is released and the state from (φ3) is
Count the falling edge of the pulse. This counter (C
O20) is equal to the number of light receiving parts of COD (Fl-M) (φ3
), the carry terminal (CY) is counted.
to “ll tgh”. From the second time onwards, the sample and hold circuit (SH2)
The output data of COD (FLY) is based on the signal (φS).
The resistor (R1), (R
2), by a subtraction circuit consisting of an operational amplifier (OA 1).
The output of the sample hold circuit (81-II) and (SH
2) is calculated, and the difference from the output of Δ-reconverter (AI))
is applied to the analog input terminal of A-D converter (AD
) starts vj operation with the signal (φA), and the counter (CO
22) based on the clock pulse (DP?) from
8-0 conversion of the input data. Here, constant voltage source (V
The output of rl) is Vrl, and the voltage drop due to leakage is 119- (1.
The output of the pull-hold circuit (St-11) is Vrl-Vd
, the output of the ripple hold circuit (SH2) is Vrl-V
l-Vd. Therefore, the output of the subtraction circuit is Vl
The signal component consists only of the amount of light received. In addition, △−ri
The converter (AD) converts A at high speed, such as a successive approximation type, for example.
-D conversion type is preferable. Eight-D transformation of all data from COD (Fl-M)
is completed and the carry terminal (CY) of the counter (CO20) is
) becomes "li ioh". This allows one
Via shot circuit (0814), OR circuit <0R22)
And flip 70 Tsubu (FF20). (FF32), D flip flora';' (D [20
). (D F22) and (D F24> are reset.
, the Q output of the D flip-flop (DF20) is "l-
ow”, the counter (CO20) is reset.
"l-1ight" from terminal (010)
Returns to the state before the pulse was input. In addition, the timer of the microcomputer (MCI) determines that the product time of 120-minutes has reached a certain value or more, and the terminal (0
When a pulse of "11gh" is input to 11), this
One-shot circuit at the falling edge of the pulse <0812)
, through the OR circuit (OR20), the flip-flop [ ] knob (
FF20> is set. Therefore, from now on, the comparator
When the output of the controller (△C1) is reversed to high u
A similar operation is performed and the output data of C0D(FLY) is
The input port of the microcomputer (MCI) is converted from analog to digital.
TPO). Figure 12 is a modified example of the circuit diagram in Figure 11 with some changes.
Yes, if the output data from COD is small,
After importing the data into (MCI), double the data.
The software in the microcontroller (MCI) (see Figure 8)
No, steps 78 to 82)
- This is done in hardware before D conversion.
be. When the terminal (φR) is “= Hi, l, 11, it is a constant current source.
(CIS), potential determined by resistors (R10) to (R13)
V “1 is given to CCD (FLM)” l nw
”, the CCD (FLM) monitor output is compared.
To the (-) input terminal of the motor (A C10) to (△Cl2)
Cheerable. Then, the integral is A (and the monitor output is Vr
When the potential of 2 is reached, the comparator A C12)
The output becomes “+Hj,,hn” and the one-shot circuit (
A 'High' pulse is output from the OS 10), and this
Flips through the OR circuit (OR20) by the pulse of
After the flop (FF20) is reset, the process is the same as above.
Perform the following actions. 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 “)-i igl
+ ” tJ so D flip 70 knob (DF38) Q
The output becomes “HiQh'” and the analog switch (A8
4B), (A838) is conductive. Here the resistance (
The values of R30) to (R40) are R30=R40=R3
8=R48-R36/1, 5=R46/1,5
=R34/2=R44/2=R32/2.5=L42
/2.5-, analog switch (A838
), (AS48) becomes R30= R40=
Since R38=R48, the operational amplifier (OA 10
> outputs the Vl signal as is. On the other hand, the COD output has low contrast and the best integration
If the output of the comparator (AC12) is not reversed within
From the output terminal (011) of the microcomputer (MCI)
OR circuit from the one-shot circuit (0812) by the signal of
1-1-1i” pulse is output via the circuit (OR20)
The monitor output at that time is Vr2 to Vr3. V
r3~Vr4. Between Vr4 and Vrl
Exclusive OR circuit (EOII)
), (EO2), via inverter (INS2)
Then D flip 70 knobs (DF3B>, (DF3
4>, one of the Q outputs of (DF32> is “H”
igh” and each analog switch (△83B
), (A846), (AS34). (AS44), (AS32>, (AS42) are
Pass. Therefore, the integration is forcibly stopped and the next monitor
1.5VI, 2Vl depending on the output. 2.5Vl signal is output from operational amplifier (OA 10)
be done. 123- Figure 13 is shown in Figures 8 to 10.
CI) shows a modified example of the operation, -F, focus is detected
Flowchart when out-of-focus is detected continuously in later measurement results.
- Shows the main part of the chart, No. 130 steps and N
Regarding flag IFF 2 between steps O and 138
A step has been inserted. In other words, up to the in-focus zone.
1/lens focus adjustment is performed, and the end flag FNF is set to "
0'', (No, 130), No, 3!i1
In the step, it is determined whether flag IFF 2 is “1” or not.
It will be done. Here, if the flag lFF2 is 10'', this flag
Lug IFF 2 to 1″, No. 270 steps.
Move to step 3 and perform measurement again for confirmation. On the other hand,
If the lag rFF2 is "1", the measurement result for confirmation is
This resulted in two consecutive out-of-focus conditions (1△L1≧ZN1).
In this case, the flag IFF. Set TFF 2 to ``0'' and set flag FPF to ((I II
Then move to step No. 135 and refocus.
Perform adjustment operations. In addition, step N 0033 and
between step No. 12 and step No. 01240.
A flag is placed between the 124-b and the 241 statives.
A step to reset IFF2 and return it to its initial state.
Step (No, 34. No, 241 > is provided)
It is. Figure 14 shows No. 100 steady in Figure 8, i.e. low-
21 Steps to determine whether truss 1 or not
r) []-. First, change the contents of register C to 11
(set it to 111 (No, 370) and set register 1 to #
I go to I+ (N O, 371) i. Next, the iMth
Output of the 1-1-1st light receiving element at, ai+1
Absolute difference of (101ai-ai+1 1 in register C)
The value added with the contents is set in register C (No, 372
), 1 is added to this register i (No, 373
), the content of this i and n (n is the total number of light receiving elements
) is compared (No, 374). here
, i<n-11,), No, return to step 372.
Then, the absolute value of the difference is successively multiplied, and when 1=n-1,
NO, move to step 375. That is, N O,
At the time of moving to step 375, the contents of register C
]]a1-a21-+-1a2-a31+1a3-
aJ +-+1an-2-an-1l+ jan-1-
an 1, and as is well known, the subject's
There is a value of 4-" in the value indicating
(C) If it is CD]n[
・If there is enough us1-, P N O, 101 Stesive
If (C)≦01), it is low Nikon 1-last.
So NO, 10! Move to step i. 4'i' Two series of light receiving elements are used to detect the focus adjustment state.
When row 4r is output as a child output, 11 is used to determine the contrast 1~
It is sufficient to use the output of the series of . Also, the subject
The data that can be mapped to the body's ntrus 1 is def 4-
It is found in the process of calculating the sludge m and the defocus direction.
If so, memorize this data and use the
By determining whether or not the controller is
Even if the determination of steps 1 to 1 is made, it is not possible. Part of the circuit section of the automatic focusing camera system in Figure 1
Figure 2 shows the case where most of the operations are performed by the microcontroller.
I have explained based on Figure 14, but the above operation is
Through a digital circuit that combines logic elements and arithmetic circuits, etc.
Okawa can do it too. An example of such a case is shown in Fig. 15.
This will be explained based on FIG. Figure 15 is the same as Figure 1.
This is a circuit diagram specifically showing the circuit, and FIG. 16 is a circuit diagram specifically showing the circuit.
Generates a signal that controls the operation of each circuit shown in the figure.
FIG. 2 is a circuit diagram showing a timing signal generation circuit. first,
The configuration and operation of the timing signal generation circuit shown in Fig. 16 are as follows.
1. It is explained below. The switch (193) is as shown in Fig. 15.
To start the operation of the entire circuit shown in Figure 16
A switch that is closed, and the closing signal of the switch is the first
Connect Lj to the input terminal (ill) of the microcomputer (MCI) in Figure 2.
"H+Qh u l corresponds to the novel signal. When the switch (193) is closed, the inverter (194
) output becomes ゛to+high11, one-shot circuit
(196) outputs a pulse. This pulse is or
From the output terminal (τO) of the circuit (198) to the entire circuit section
Output as a signal for setting the initial state. In addition, the pulse from 929371~circuit (196) is
Output terminal (τ 1) of OR circuit (199) or IBCOD
(FIM) integration operation and data reading 127- A signal to start the reading operation of the circuit <+-Oc>.
It is output as No. and No.1. Furthermore, this output terminal (τ 1)
The pulse from the flip-norotub (201). AND circuit <202), counter (203>, one-shut
191 ~ circuit (20/l), OR circuit (2(-) O)
I is applied to a first pulse generating circuit consisting of I. first
The pulse generating circuit generates a first pulse in response to the generation of this pulse.
During the predetermined time h1@, jetfl, , Figure 15 r
A data reading circuit (lDC) is required for data reading.
After the time has elapsed, the carry terminal of the counter (203)
A pulse is output from (τ 2). This output terminal (τ
The pulse from 2) is sent to the flip-flop (206),
Command circuit (207), counter (208>, one-shot
The second circuit consists of a cut circuit (209) and an OR circuit (205).
is applied to the pulse generation circuit. This second pulse generation
The circuit responds to the occurrence of this pulse for a second predetermined period of time.
Start counting, and then add the data required for Ni's 1j to the small data.
After the time has elapsed, the carry terminal of the counter (208>
A pulse is output from <τ 3). This pulse 128- is an AND circuit (222) and an OR circuit (223). (199) to the first pulse generation circuit,
This causes the counter (203) to start counting. child
Here, the AND circuit (222) is the output of the OR circuit (192).
The gate will open when the force is ')-1ight''
The output of the OR circuit <192) is “Hi”.
gh”, the power is output from the terminal (τ 1) or τ 3).
The pulses are output repeatedly in sequence. The pulse from the output terminal (τ 3) is passed through the AND circuit (21
0), flip 70 knob (212), and turn
path (213), counter (214). From one-shot circuit (215) and OR circuit (211)
is applied to the third pulse generating circuit. AND circuit (
210>, the output of the OR circuit (192) is "" 1- o
w”, the gate is opened and the third pulse
The pulse generating circuit generates a third predetermined pulse in response to the generation of this pulse.
The correction operation circuit starts counting the time and will be described later in FIG.
(174) after the time required for the correction calculation has elapsed.
Outputs a pulse from the carry terminal (τ4) of the terminal (214>)
do. The pulse from the output terminal (τ4) is passed through the AND circuit (
216), flip 70 tube (21B),
From the code circuit (219>, counter (220). One-shot circuit (221), OR circuit (217)
is applied to the fourth pulse generating circuit. AND circuit (
216), the output of the OR circuit (192) is °“1-ow”
The gate is opened when , which triggers the fourth pulse.
The raw circuitry measures a fourth predetermined time period in response to this pulse generation.
After the predetermined time has elapsed, the counter (220
) outputs a pulse from the terminal (τ5). this
The pulse is an AND circuit (226) and an OR circuit (223). (199) is fed back to the first pulse generation circuit.
. Here, the AND circuit (226> is the OR circuit (192)
When the output of is LOWII, the game ]- will be opened.
, and the output of the OR circuit (192) is "' l o
w”, the pulse is output from the terminal (τ 1) or τ 5).
are output repeatedly in sequence. From the timing signal generation circuit shown in FIG.
The operation of the circuit section shown in FIG. 15 is controlled in accordance with the pulse.
The configuration and operation of its circuit portion will be explained below. First, open the switch (193) in Figure 16 to open the terminal.
A pulse is output from (τ0), and this pulse causes the
7 lip-flops (14, 9>, (160),
(170). (171) is also flipped via the OR circuit (148).
The flops (137) and (151) are further connected to the OR circuit (
, 117), and a one-shot circuit (118).
The lip 70 knobs (119) are each reset. Also, reset the flip 70 knobs (137) and (151).
The output of the OR circuit (152) becomes “LOW” due to the
So D flip 70 knobs (135), (139)
and T flip-flops (132) and (138) are reset.
reset by flip-flop (160).
T flip 70 knob (141), D flip 70 knob
(142) is horn set. Also, in Figure 16
Therefore, the pulse from the terminal (τ0) is an OR circuit (199)
is applied from the terminal (τ 1) to the 131-1st pulse generating circuit via the flip-flop (2
01). With this set, the counter (2
03) is released from the reset state and the oscillator (224
) starts counting clock pulses from ). same
At times, the data reading circuit (LDC) in FIG.
1) The lens circuit (LEC) is activated by the pulse from
The reading operation of the conversion coefficient K[ is started. In addition, the signal processing
The logic circuit (106) applies J to the pulse from the terminal (τ 1).
:Starts the light receiving integration operation of the COD (FLM). In Figure 16, a pulse is output from the terminal (τ 1).
The time required to read the above data KL has elapsed since the
Then, from the carry terminal (τ2) of the counter (203>)
Pulse is output. One in response to the falling edge of this pulse
The shot circuit (204) outputs a pulse, and the OR circuit (
200) to reset the flip-flop (201).
to stop the counting operation of the counter (203).
. Also, the pulse from the terminal (τ2) is the second pulse generation time.
The counter (208) operates on run 1 of the clock pulse from the oscillator 132-(22/l).
Start. At the same time, a pulse from terminal (τ 2) causes
, the multiplication circuit (112> in FIG. 15 is a fixed data output circuit)
Conversion coefficient KB and data on the camera body from road (111)
Conversion coefficient K of shooting 1 noise from data reading circuit (LDC)
By multiplying L by 11 points, we get the conversion coefficient K of the camera system body.
= K +-・KB is calculated. Also, for the pulse from terminal (τ 2), as shown in Fig. 15,
The lit calculation circuit (110) is this multiplication circuit (112).
The fixed data output circuit (105) focuses on the calculated value of
The motor corresponding to the width of the focusing area is multiplied by the width 7N.
Output -ZN i at the rotation speed N+ =. In Figure 16, a pulse is output from the terminal (τ2).
The time required to calculate Nt has elapsed since the above data.
Then, the carry terminal (τ 3) of the counter (208>
A pulse is output from. In response to the falling edge of this pulse
One-shot circuit (209> outputs a pulse and performs an OR circuit
Reset the flip 70 knob <205) via the path (205).
Set this to stop the counting operation of the counter (208).
let At this time, the output of the OR circuit <192) is "1"
ow”, then go to game 1 of AND circuit (210)
The pulse from the terminal <τ 3) is passed through the AND circuit (2
10) to the third pulse generation circuit, and the counter
The counter (214,) receives the clock signal from the oscillator (224).
Starts the pulse counting operation. Also, due to the pulse from the terminal (τ 3), the
The multiplication circuit (113) is connected to the terminal (
Def from w), 1-Cas Raku 18 L1 and) 1) Arithmetic circuit (
Multiply the calculated value from 112) by 1 for focus.
The mode necessary to adjust the non-zero ([L) to the in-focus position.
The number of revolutions of the motor is N=K・1Δ1−1. When the motor (MO) is stopped, the correction calculation circuit (114)
is the calculated value from the multiplication circuit (113) as it is, or
When the motor rotates, perform the following correction calculation and use the calculated value.
are output as output data Nm, respectively. (This time
The operation of path (114) is No. 140 to N in FIG.
o, corresponds to the flow of 162 shortcuts. ) i.e.
When the motor is rotating, integrate and calculate from the previous data Nm'
Data corresponding to the amount of motor rotation during the period required for
(punishment) is reduced data Nm' −r−to=Nm
”, the current data N is obtained at the middle point of the integration.
Data N-(τ/2+to) = N'
is calculated. The average value of these current and previous data (N
' +Nm ''), / 2 = Nm is complementary
output from the correction calculation circuit (114) as
Powered. Here, τ-ECD 1-ECD 2゜to
=EcD2-FCD3, FCDI. ECD 2. ECD 3 is connected to the terminal shown in Fig. 16 (
Pulses are output from τ 1), (τ 2), and (τ 3).
Presettable down counter (115)
This is the output of In Figure 16, is the pulse input from the terminal (τ 3)?
After the time required for the above correction calculation has elapsed, the counter (2
14) outputs a pulse from the carry terminal (τ 4)
. In response to the falling edge of this pulse, the one-shot circuit <2
15) outputs a pulse, and the flip 70 tube (212) is output via the 135-OR circuit (211).
) to reset 1 to 8 on the counter (214).
Stop the production. At this time, the OR circuit (192)
When the output is “Low”, the terminal (τ 4)
The pulse from
The counter (22) is given to the pulse generation circuit and the counter (22) is an oscillator.
(Starts the count operation of the black pulse from 221.
Ru. Also, due to the pulse from the terminal (τ 4), the 15th
The down counter (115) in the figure is
The data Nm from is transmitted. At the same time, this
Free knob flop by pulse <170) no>
<Set AND circuits (166), (168). (169> gate is opened. At this time, the signal processing circuit
Indicates the defocus direction from the terminal (V) of the line (106).
If the signal is at the 'l-1igt+' level, the AND
Display unit (180) via circuits (165) and (166)
The front pin is displayed at the 'low' level.
If there is an AND circuit (167). (169) and the rear 136 at the display section (182).
− A bin display is made. In Figure 16, is the pulse input from the terminal (τ 4)?
After a predetermined period of time has elapsed, the counter (220>
A pulse is output from the child (τ5). respond to this pulse
The one-shot circuit (221) outputs a pulse and
Flip-flop <218) via circuit (217>)
Reset and stop counting operation of counter (220>)
let The pulse from the terminal (τ5) is passed through the AND circuit (2
26), terminal via OR circuit (223), (199)
(τ 1), and in the same manner as above, the product of COD
minutes, reading of data K[, calculation, correction calculation, data Nm
Repeat settings, motor drive, etc. in sequence. Also, the terminal
The pulse from (τ 5) causes the flip-flop in Figure 15 to
When the top (171) is set, the AND circuit (172),
The gate of (173) is opened and the signal processing circuit v8 (106
) according to the level of the terminal (V) of the AND circuit (172)
. (173) one of the outputs becomes “High”
. As a result, the motor control S circuit (MDR)
Rotate (MO) in the hour h1 direction or in the anti-hour direction. The rotation of this motor (MO) is controlled by a slip mechanism (St~
P), the camera side coupling via the transmission mechanism (+-[) R)
(102). This camera side coupler (10
2) is rotated by the lens 1 coupler (101) and the drive mechanism (
100) to the focusing lens (F L ).
is reached, and the focusing lens (F L ) is at the in-focus position.
The encoder (ENC) is connected to the transmission mechanism (LDR).
The amount of rotation (i.e., the rotation amount of the transmission mechanism (+-[) R)
The number of parameters according to the movement of the focus lens (FL)
This pulse sequentially outputs a down counter (
115), the preset data Nm decreases. Ma
In addition, the pulse from the terminal (τ 5) in Figure 16 causes a flip.
When the flip-flop (119) is set, the encoder
The pulse from (ENC) is passed through the AND circuit (120).
and is applied to the one-shot circuit (121). this one
Pulses and flip-flops from shot circuit (121)
The Q output of the drop <119) is passed through the OR circuit (123).
The discharge transistor (155) of the capacitor (156)
) is given to The transistor (155) is a one-shot circuit (121)
) and flip 70 knobs <119
) becomes conductive and discharges the capacitor (156) when reset.
let Here, pulse generation from the encoder (ENC)
Capacitor (156) and
A time constant is set by the resistor (157). Also
, pulse output from terminal <τ 3) to terminal (τ 5)
The period until the pulse output from is very short, and this period
The motor rotation amount is so strong that it can be ignored, so during this time
The above correction calculation based on the rotation of the motor is not performed. The comparison circuit (130) is a terminal of the signal processing circuit (106).
Defocus amount 1△L1 from (W) and data output circuit
Compare the focusing width ZN from (109), l△L1≦7
When N, the output is set to "'l-1-1i". one shot
The cut circuit (136) generates a pulse in response to the rise of this output.
and set the flip-flop 139-Rozzo C137). The comparison circuit (116)
, It) Exposure circuit (110) motor in the h-th focusing area
-Count from rotation 11N+ and down counter (115)
Compare the value ECD and set the output to “+” when Ni≧ECD.
-+ I'm going to join you. One shot times v8 (150
) outputs a pulse in response to the rising edge of this output, and
Set the flip-flop (151). flip fro
The Q outputs of tops (137) and (151) are both OR circuits.
(152), (163), inverter < 164. )
is given to the AND circuits (172) and (173) via
Ru. Therefore, (Δ"1≦7N or Ni≧ECD)
The focus is determined and the flip 70 knobs (137) and (1
When the output of 51) becomes “)ltgh”, the AND circuit (
'172), (173) gates are closed and the motor
The control circuit (MDR) stops driving the motor (MO>).
Ru. At the same time, the D flip-flop is connected via the OR circuit (152).
flop ('135), (139), T flip-flop
The resets of (132) and (138) are released. -1/10- In this way, the next cycle after the cycle in which focus has been determined
The focus state is determined by the comparison circuit (130)
When the pulse is output from the terminal (τ3), the amplifier is
The comparison circuits (131) and (134) at this time
The output of the circuit (130) is sent to the D flip-flop (135).
Latched. Next, in response to the falling edge of terminal (τ 3)
The output of the T-flip tip (132) is inverted and activated.
The gates of the gate circuits (133) and (134) are
He is closed. In-focus state in the next cycle
is determined and a pulse is output from the terminal (τ 3).
, and the AND circuits (131) and (133) at this time.
The output of the comparator circuit (130) is connected to the D flip-flop (13
9). After this, the focus is temporarily turned off.
After the 1l separation, the in-focus state is determined twice. OR circuit (144) is D flip 70 tube (135)
, (139) as input, and the sum of these two times is
If at least one of the focus determinations was in focus,
The output becomes °I High=. Also, both times the focus was
If not, the output will be II L 0W11
. Furthermore, due to the fall of the output of the AND circuit (133), the T-flip is
The Q output of the lip (138) is ''L o w II etc.
Then, the gate of the AND circuit (131) is closed. Now, the least of the above two focusing \tl 'b+1
If both are in focus once, use the AND circuit (146)
gate is opened and responds to the pulse from terminal (τ 4)
Then the flip 70 < 14.9) was set to Sera 1~
Ru. OR circuit (143), AND circuit by this ass 1~
The output of the circuit (168) becomes a++9h'', and the AND circuit
tract (165), (166), (167). The output of (169) becomes "+10W11," and the display part (
In step 181), the focus is displayed. On the other hand, both times
If there is an out-of-focus r, the
The gate of the terminal circuit (147) is opened and the terminal (τ 4)
through 11 circuits (1=18) in response to pulses from
Flip 70 knobs (137) and (151) are reset.
It will be done. These resets cause the output of the OR circuit (152) to
The power becomes II + - 0W)l and D Fritsuno 70tsubu (
135). (139), T flip 70 tube (132). <138) is rehit. Also, an AND circuit (17
2), the gates (173) are opened and the motor control circuit is activated.
road (MDR) resumes driving the motor (MO). Next, the focus lens (Fl) is the closest or
Focusing is performed from the comparison circuit (130) even when the extreme end position is reached.
The operation when it is not determined will be explained below. in this case
, even if the motor (MO) is rotating, the transmission mechanism (LD
Since the mechanism after R) is forcibly stopped rotating, J
Pulses are no longer output from the coder (ENC). follow
1 to run by the output of the one-shot circuit (121).
Jister (155) pulses 3#iff! things to do
The capacitor (156) and resistor (157)
The output of the switching circuit (158) after a certain period of time
is reversed to "'Htgh". That is, reaching the terminal is detected. Respond to the rising edge of this output
Then, the one-shot circuit <159) outputs a pulse and
Set lip 70 knob (160) -143-J. With this distance, 37 circuits (163), inverter
C AND circuit (172), ('1
73) is closed and the motor control circuit (MDR
) stops the rotation of the motor (MO). At the same time, Dingfu
Lipflip L1 tube (141), D flip 70 tube (1
24>, <14.2) Nori Sera 1- is released.
It will be done. Also, 11 circuits (163). One shot 1-(118) is a pulse through (117)
Output and reset flippfu[]cop119)
Then, j and switch i transistors (155) are kept conducting.
to hold. In the next one cycle, the terminal (τ 3
), when a pulse is output from the 1z circuit (140)
Therefore, the output of the comparator circuit (130) at this time is D-flip.
is latched to the push button (142). Also, signal processing
f focus direction from terminal (V) of circuit (106)
The signal is latched into a D flip-flop (124), which
This creates an AND circuit (125) and an OR circuit (127).
Via display section (180) or (182) before smell-C
Bin display or rear pin display is performed. -14/I- Now, the flip-flop (149) or (160)
When the output becomes l Hi, i, II, the OR circuit (19
The output of 2) becomes ')li(lh'), and the AND circuit (
226) is also connected via an inverter (225).
The gate of the AND circuit (210>. (216) is closed. This causes the terminal
(τ 3), (τ 4) to the third. Fourth pulse generation time
The transmission of pulses to the tract is cut off. At this time, the AND
Since the gate of the terminal (222) is closed, the terminal (τ3)
) The pulse from the AND circuit (222) and the OR circuit (2
39), given to the terminal (τ 1) via (199)
, from now on, we will integrate the COD, read the data, and perform calculations.
only is repeated. In addition, the switch (190) is set to manual.
This is a switch that is closed when adjusting the focus.
, by opening this switch, the output of the OR circuit (192) becomes
It is always 'Il 1g11 u, and after the above focus detection
and only the same actions as after termination detection are performed.
. Now, in FIG. 17, the decoder (235)
"'l-11(l) of the output of the OR circuit (192) in Fig.
h”, the signal processing circuit in Fig. 15 becomes active.
(106) depending on the data from the terminal (po) or
pO) to °“Htgh”. l) The circuit (233) is connected from the terminal (τ2) in Fig. 16.
The pulse allows the data output circuit (232) to
The data δ corresponding to the diameter of the blur and the decoder (,231>
The depth of focus at that aperture value is obtained by multiplying by the absolute aperture value F from
Calculate the degree ΔD−δ×F. Here, decoder (231>) is a comparison data output circuit
(230) outputs the setting aperture or focusing aperture aperture.
This is a circuit that converts the pex value Av into an absolute aperture value. ratio
The comparison circuit (23, 4) compares this calculated depth of focus ΔD with
Defocus from the signal processing circuit (106) in Figure 15
Compare ff1l8L1 and output when ΔD≧;ΔL1.
The power is set to ``HLoh'' and the AND circuit (241>, (2
43>. Open the gates at (244), (246), (24,8)
. On the other hand, the comparison circuit (234) calculates ΔD<1ΔL! When
output is set to “low” and the AND circuit (240), (2
42), (245>. Open the gate of (247). Therefore, the terminal (pO) is "
High”, the display means (250) indicates the terminal (r)
1) , (p2) , (p4) , (p5
) is '+''high'' and the comparison circuit (2
If the output of 34) is 'Low', it corresponds to the above terminal.
Display means (251), (,25,2), (253)
, (254), the terminal (pO) is l Higl,
In case of II, the display means (255) performs display operation respectively.
Do the following. Also, any of the terminals (pl) or p5)
or one is # Higl, II of the comparator circuit (234).
If the output is 'l-1-1i', it corresponds to the above terminal.
One of the display means (260) or 264) to
Each performs a display operation. These display means are shown in the viewfinder as shown in FIG.
There is no display means (260) below the outside of the field frame (270).
264) and (250> or 255)
They are divided into 7 groups and arranged one above the other. In addition, the display means (2
60) or 264. ＞For example, both are for green emission.
There is one light-emitting diode (147), and the result of the subject located in the distance measuring frame (271>) is
Lighting indicates that the image position is within the focal point. Further, the display means (250> or 255> may be, for example,
Both are light-emitting diodes that emit red light, and the depth of focus is
Lights up to warn you that the temperature is out of range. Also, the first
The display means (180) or 182) shown in FIG.
arranged above and outside of the finder field frame (270).
Ru. Note that these display means may be composed of lamps, liquid crystals, etc.
. Now, the display operations by these display means will be briefly explained below.
I will clarify. First, for a relatively narrow area of the field of view frame (270>)
The photographer focuses on the corresponding rangefinder frame (271>).
The direction of the camera is determined so that the main subject is facing the main subject. When the switch (193) is closed in this state, the
automatic focus adjustment is performed, and the focus condition at this time is improved.
on either display (180) or 182).
will be displayed. When the imaging position reaches within the focus area, the display hand
The step (181) lights up to indicate focus (148-), and at the same time, the movement of the focusing lens stops. From now on, keep the switch (193) closed and turn on the camera.
The part of the subject you want to change the direction of and check the depth of focus is in the rangefinder frame.
(271), you can check the depth of focus and
You can display the following information. That is, the output of the OR circuit (192)
The decoder (235) is
Becomes active. Check the depth of focus regarding the subject.
The defocus amount and direction data are stored in the signal processing circuit (
106) to the decoder (235>) and the decoder (235>
Which of the terminals (po) or pO) of the carder (235>)
or one of them yells 'l-1-1i'. Also, this default
The force amount 1ΔL1 is determined by the comparison circuit (233) according to the aperture value.
The depth of focus data ΔD is compared with the depth of focus data ΔD. This decoder output
Depending on the force and comparison result, one display means lights up;
Displays whether or not the imaging position is within the depth of focus when
Ru. In addition, to check this depth of focus, open the switch (193).
You can do this at any time, so change the direction of the camera.
This allows the depth of focus to be checked as many times as desired. Ma
Also, when the focusing lens reaches its final position, the motor (
Similarly, when the MO) stops rotating, this depth of focus
Can be confirmed. Now, by opening the switch (193), the input
One-shot circuit (197) via converter (195')
) outputs a pulse and passes through the terminal (τ0) to the previous)
The various 7 lip-flops are reset and the
The timing signal generation circuit (128) is reset and the first
The circuits shown in Figures 5 and 16 stop operating. Furthermore, this
To stop the operation, press the camera release switch (RL S
) may be performed in response to the opening of Focus confirmation display state shown in FIGS. 17 and 18 above
Other embodiments will be explained based on FIGS. 19 and 20.
do. In FIG. 19, the decoder (280>
Activated by “l-1i (lh)” of the output of the circuit (192)
state, and the signal from the signal processing circuit (106) in FIG.
Depending on the data, one of the terminals (pO) or p8)
Set one of them to "It 1g11". Therefore,
The output of either of the
(294) or 302> respectively display means.
(320) or 328), the signal processing circuit
A display is made according to the amount of deviation from the path (106). one
On the other hand, by opening the memory switch (290), the inverter
From the one-shot circuit (292) via (,291)
A pulse is output and this switch (decoder when WI is established)
280) output is D flip 70 tube (281) or
289) To be struck. Memorized by these latches
The output of the decoder <280) is the OR circuit of 4(above)
is displayed by the above-mentioned display means via. Therefore, table
In the indicating means (320) or 328), the memory switch
(290) The display of Lord Zure memorized at the time of creation and the current state
Two types of display are performed: the display of the amount of deviation and the display of the amount of deviation. This record
The memory is updated each time the memory switch (290) is closed. By the way, is the D flip-flop mentioned above an OR circuit (192)?
The reset state is canceled by the (high) output.
Ru. Further, the decoder (310) outputs the aperture data output 151 - a focus determined based on the data AV from the circuit (230).
Terminal (UO) or u6 to correspond to the width of 1 degree.
) selectively, centering on terminal (13).
d. That is, for example, if O<AV≦2, the edge
If only the child (u3) is 2∆V≦4, the terminal (u2)
If r,;Ishikuu4) is 4 < AV≦6, then the edge
If the child (ul) or u5) is 6〈△V, the terminal (
un) or u6) respectively" l-1iqh
"Howler. This is the display means (330) or 336).
and terminals (UO) or u6) respectively.
It is set in. These display means (320) or
328) and (330) or 336) are the 20th
As shown in the figure, below the outside of the viewfinder field frame (270>)
The display means (330) or
336), the depth of focus is adjusted according to the aperture data AV.
is visually displayed, the display means (320) or 32
8), the data of the amount of deviation at the time of storage J5 and at the present time is
Is displayed. In other words, the object located in the distance measurement field frame (271)
Where is the imaging position of the subject located in the depth of focus 152-, or which culm degree is off?
can be easily identified visually. Depth of focus confirmation display mode shown in Figures 15 to 18
Yet another embodiment of the invention, namely automatic focusing with a small number of display means.
An example of displaying the time and focal image (capital) confirmation is shown below.
This will be explained based on FIG. 21. In the figure, the OR circuit (
192) output is “low” and is used to drive the motor.
If automatic focus adjustment operation is being performed by
(343) or 346) is closed.
Ru. Therefore, AND circuits (351), (353), (3
The gate of 53) is closed and the AND circuit (350). Gates (352) and (354) are open. In this case, the AND circuit (166) in FIG. (16B>, (169))
0), (181), (182) is the lighting table
Show. On the other hand, the output of the OR circuit (192) in Fig. 16 is
When H+gh″′, AND circuit (343) or 3
45) gate is opened. At this time, comparison of Fig. 17
The output of the circuit (234) is ``1igl+'' (i.e.
If △D≧1Δ11), the output of the AND circuit (344>
``l-1ioh'' and the AND circuit (353)
Game 1- will be held. Also, in the AND circuit (346)
is the σ) clock pulse from the oscillator (224) in Figure 16.
The frequency-divided pulse from the frequency divider (342) is given λ
This frequency-divided pulse is processed by an AND circuit (346). (353) is given to the display means (181) by fi L.
Ru. This allows the imaging position of the subject to be adjusted when checking the depth of focus.
If it is within the depth of focus, a display means (181) for displaying the focus is displayed.
) is the point 'IA'? lru. Here'? ', automatic focusing operation
If the focus state at the time of stopping is the front bin, the display means (1
80) is always lit, and this and display means (181)
The autofocus movement stops due to the blinking of t-ft,! I do
The display can be distinguished from when checking the depth of focus. Also, auto focus
If the focus is reached when the adjustment operation is stopped, the display means (181
) will only blink, and if it is the rear bin, the display means (
182) is always lit and the display means (181) blinks. This J: Focus state when automatic focus adjustment operation is stopped
By constantly lighting the button, the focus status will blink when checking the depth of focus.
Since both are displayed at the same time, automatic focus
Common display means (180) or 182) during adjustment
can be used. Effect: As described above, the present invention is based on the tenth focusing state determining means.
It is determined that the image forming position is within the focus area of a predetermined width.
Then, the depth of focus is confirmed by the second focus state determination means.
The image is formed within the depth of focus corresponding to the shooting aperture.
Determine if the position has been reached and display this.
Therefore, after this focus judgment, for example, change the direction of the camera.
By doing this, the imaging position of the desired part of the subject is within the depth of focus.
It is easy to visually check whether or not the focus has been reached, and the focus adjustment device
For example, when photographing a subject with depth.
Adjust the focus according to the photographer's intention.
It becomes possible to

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the outline of the camera system according to the present invention, FIG. 2 is a circuit diagram showing the circuit configuration thereof, and FIG. 3 is a flowchart showing the operation of the microcomputer 14c2 shown in FIG. 2. , Figure 4 shows the microcomputer (MC2
) is a poly circuit diagram showing the specific circuit configuration of the serial data input section (SDI), and Figure 5 is a circuit diagram showing the circuit configuration of the 21 inverter (CV) and interchangeable lens (LE) attached to the camera body. , Figure 6 is a circuit diagram showing the specific circuit configuration of a light emitting diode drive circuit (FAD) controlled by a microcontroller (MCI), and Figure 7 is an optical system in which the conversion coefficient changes depending on the focal length. The focal point rl of a variable power lens having
'1l) Graph showing the relationship between 1
FIG. 12 is a circuit diagram showing the main circuit configuration of a modified example of the control circuit (COT), and FIG. 13 is a modified example of the flow of the microcomputer (MCI). 1 flowchart 17-(~, FIG. 14 is a flowchart specifically showing the operation of No. 100 steps of the microcomputer (Me 1) in FIG. 156-141'\I: A circuit diagram showing the circuit configuration of the second implementation 1911 of the camera system, Fig. 18 shows its focusing state display mode, Fig. 7J, and Fig. 19. Modification of the circuit of FIG. 17 1.: A circuit diagram showing the circuit configuration of the third embodiment,
FIG. 20 shows the focusing state display mode; FIG. 21 is a modification of the circuit in FIG. 17; and FIG. 1 shows the circuit configuration of the fourth embodiment. B [)=Camera body, 1-": Photographic lens, "[-Knee focus lens, FLY: Light receiving means for focus detection, 106: Signal processing means, 107: 10th focus state determination means, 108: 2nd 109: Depth of focus display means, 105: Aperture data output means, MDR
: Drive means. Applicant Minolta Camera Co., Ltd. 157-ji\J Aji\J Aji Aji Q-Mimi ξ (j Cal O Figure 11 Figure Zθ Figure 21 Procedure Amendment (Method) September 1988 58 1, Display of the case 1981 Patent Application No. 81977 2, Name of the invention Focus state confirmation device 3, Person making the amendment Relationship to the case Lu Yan Person Address 2-30 Azuchi-cho, Higashi-ku, Osaka City Name of Osaka Kokusai Building (607) ) Minolta Camera Co., Ltd. No. 17
Change "Figure 1" to "Figure 15 to Figure 17".

Claims (1)

[Claims] 1. Focus detection light receiving means for receiving light from a subject portion corresponding to a relatively narrow predetermined area of the photographing screen via a photographing lens, and detecting a desired subject based on the output of the light receiving means. a signal processing means for outputting data on the amount of deviation of the imaging position with respect to a predetermined focus position; and a signal processing means for outputting data on the amount of deviation of the imaging position with respect to a predetermined focal position; In a focus adjustment device equipped with a focus state determination means, the operation is started in response to a determination of focus by the first focus state determination means, and according to data from the signal processing means and an aperture value. a second focusing state determining means that compares the depth of focus data with the depth of focus data and determines whether or not the imaging position has reached the depth of focus; A focusing state confirmation device comprising a depth of focus display means for displaying a depth of focus. 2. The focus adjustment device drives the focus lens of the m shadow 1 lens by another means until focus is determined, and then drives the lens in response to the focus determination. The lens driving means according to claim 1 further includes a lens driving means for stopping the lens driving means, and the tenth focusing determination means starts operating in response to stopping of the lens driving by the lens driving means. Focus state confirmation device. 3. The depth of focus display means has a large number of display elements set (-1) corresponding to the value of Z1], and one of the display elements is set at a position where one of the display elements is shifted from the signal processing means. The focus state confirmation according to claim 1 or 2, further comprising a selection means for selecting and overriding the amount of data and a determination result from the TF second focus state display means. Device.