JPS59159136A - Focus detector - Google Patents

Abstract

PURPOSE:To simplify operation by providing a focus detector with two focusing width signal output means outputting focusing width signals having different focusing width each other and selecting any one of the focusing width signals in accordance with automatic/manual driving of a focusing lens. CONSTITUTION:The focus detector is provided with the 1st and 2nd focusing width signal outputting means 117, 118 outputting focusing signals having the 1st and 2nd prescribed width which is different each other, a driving mode signal outputting means 116 outputting a driving mode signal commanding the automatic/manual driving of a focusing lens FL in a photographing lens LE, a focusing width signal switching means 119 inputting respective focusing width signals from the 1st and 2nd focusing width signal outputting means 117, 118 and outputting the 1st/2nd focusing width signal 117/118 in accordance with the automatic/manual driving signal outputted from the driving mode signal outputting means 116, and focusing discriminating means 113 discriminating whether the image formation position of a subject to be focused is included in a range to be focused or not on the basis of a shifted variable signal and a focusing width signal from the focusing width signal switching means 119.

Description

[Detailed Description of the Invention] Technical Field The present invention is directed to determining whether the imaging position of a subject to be focused is within a focusing area (hereinafter referred to as a focusing zone) centered on a predetermined focal position. Regarding a focus detection device that detects σ, in particular, the focus detection device used in a focus adjustment device that manually or electrically drives a focusing lens of a copying lens toward a predetermined focal position based on the detection result is shown in FIG. .

Conventional technology The detection accuracy for detecting the in-focus state, that is, the value of the in-focus width of the in-focus zone, is generally determined by taking into consideration the optical system of the focus detection device and the driving accuracy of the focusing lens of the photographing device. It can be decided. For example, when an encoder detects the amount of rotation of a motor that electrically drives a focusing lens of a predetermined image, the focusing control amount is determined based on the control level of the motor and the resolution of the encoder.

Therefore, in the case of focus adjustment mode (hereinafter referred to as AF mode) in which the focusing nonce is electrically driven, it is possible to sufficiently improve focus detection accuracy by increasing encoder resolution and motor control accuracy. There is C. However, in the case of focus adjustment mode (hereinafter referred to as FA mode) in which the focus lens is manually driven based on the focus detection result, the accuracy of manually driving the focus lens is lower than that of the encoder described above, and as will be discussed later. Psychological causes of decoy images caused by instability of the focus status display 1 Due to slow response to manual operations, etc., the final focusing accuracy is extremely reduced and the operability of the camera becomes worse. . In other words, if focus adjustment is performed using FA mode 1 while the focus detection accuracy of the front focus detection side is set to the accuracy in the case of electric drive, the imaging position can be stably placed within the focus pupil. becomes difficult.

Here, the focus detection result is, for example, the front bin, in focus.

When the focus display device is configured to display two types of rear focus states in the no-inner of the camera, the following drawbacks occur. In other words, during manual operation, minute finger movements are transmitted and the focusing lens vibrates in the front and back direction of the optical axis, and the focus state is displayed by moving the imaging position into or out of the focusing zone. This causes confusion and irritates the photographer. Well, in the process of manually operating the lens for R and A-blacks on the screen, if the focus status display changes from the front bin to the focus, this will respond and the image will change to the right or manual operation. Even if an attempt is made to stop the manual operation, the inertia of the previous manual operation may cause the manual operation to be stopped when the imaging position passes through the focusing zone and reaches the position of the rear caltrop. In particular, response delays due to the inertia of such manual operations are unavoidable, and may become even more irritating to the photographer if the manual operation is performed again.

Conventionally, seven types of focus detection devices with variable focus detection accuracy have been commercially available. For example, in the focus detection device of Japanese Patent Application Laid-open No. 55-11300 or U.S. Pat. Sensitivity 4 can be changed, and
It has been proposed to change the focus detection accuracy according to the aperture value of the photographing lens, as in the focus detection device of No. 020. These focus detection devices have the advantage that by narrowing down the aperture of the photographic lens, for example, the focus range of the in-focus zone becomes wider, making it easier to manually adjust the focus, but the focus range changes depending on the aperture value. Therefore, when the camera is brought into focus at a position far away from the expected focus position, near both ends of the focus width, a photograph with poor hints may be taken. In other words, in this case, it is not possible to tell whether the distance is from the connecting point or the planned focal point, so when photographing a subject with a wide range of depth, it is impossible to perform dancing shadows as intended while keeping the depth of field in mind. There was an inconvenience.

In addition, in order to eliminate the above-mentioned drawbacks, we have also developed a Japanese Patent Application Laid-Open No. 57-
Like the focus detection device of the 185423 bow, a first focusing zone with a narrow foot width and a second focusing zone with a wide width that changes depending on the aperture value of the photographic lens are selectively switched, The second focusing zone performs coarse focusing, and the first
It has been proposed to use a motor to perform vertical focus adjustment in the focal zone of the camera.

However, this focus adjustment device only discloses focus adjustment using AF seeds, but does not disclose focus adjustment using FA mode 1 at all. Even if it were possible to manually adjust the focus, the focus width of the second focus zone would change depending on the aperture setting of the photographic lens, similar to the focus detection device described above. Therefore, in the case of manual focus adjustment, it is impossible to perform accurate focus adjustment using only the second focus zone. Therefore, after performing coarse focus adjustment using the second focus zone, Two operations were required to adjust the focus accurately.

Moreover, a switching operation was required during the focusing operation, and the operability was poor, making it impractical.

Purpose The present invention provides a focal point that can detect the in-focus state with easy operation and with a predetermined focus detection accuracy, regardless of whether the 4-reference lens of a photographic lens is driven automatically or manually. The purpose is to provide a detection device.

Summary The present invention provides an automatic focusing camera system in which a focusing lens of a photographing lens is driven toward a scheduled focal position based on a signal indicating the amount of deviation of the imaging position of a subject to be focused from a scheduled focal position. Further, the focus detection device is equipped with first and second focus width signal output means for outputting focus width signals having different predetermined values of focus width, and the focus detection device is automatically driven. The focusing width signal from one of the four focusing width signal output stages is selected depending on whether the driving is performed manually or manually, and the focusing is performed based on the selected focusing width signal and the above-mentioned cross-over signal. It is designed to detect the state of focus.

Embodiment The outline of an automatic focusing camera system according to the present invention will be explained based on FIG. 1, taking a single-lens reflex camera with interchangeable lenses as an example. In Fig. 1, the left side of the dashed line is the photographing lens (E) - a zoom lens as an example, and the right side is the camera body (Bl) C, and both are connected to each other.
They are electrically connected via (JLl) to (JL5) and (JB1) to (JB5). In this camera system, subject light that has passed through the focus lens (FL), zoom lens (ZL), and master lens (ML) of the photographic lens (LE) is reflected by the reflection mirror (10) of the camera body (BD).
8) through the semi-transparent part at the center of the sub-mirror (109).
The optical system is configured so that the light is reflected by the focus detection light receiving section (FLM) and received by the focus detection light receiving section (FLM).

The signal processing circuit (112) is a focus detection light receiving unit (FlM)
Based on the signal from , the defocus amount (Δl) indicating the amount of deviation from the in-focus position and the defocus direction (front tip, rear tip) are extracted.

The focus determination circuit (113) compares the defocus amount: Δl: from the signal processing circuit (112) with the focus width ZN of the focus zone from the focus width signal switching circuit (119), which will be described later. It is determined whether the imaged position of the covered object is within the focusing zone. Historically, based on this determination result and the signal in the defornos direction from the signal processing circuit (112), the front bin, focus,
Outputs signals indicating three types of rear focus states.

The focus state determination circuit (115) determines whether the front bin, focus, or rear bin is in focus according to the focus state signal from the focus determination circuit (113), as described in Table 1 below. Show status.

The 7-star control circuit (114) controls the motor drive required to rotate the focusing lens (FL) to a predetermined focal position based on the focus state signal and the TEF A-cus signal: Δl:. It outputs a signal and controls the rotation of the MO. In addition, this motor control circuit (114) is
The drive mode signal output circuit (116), which will be described later, accepts automatic drive and outputs a drive mode signal.When the drive mode signal is output, it is activated, and the motor (
MO) is driven and controlled. In addition, if the manual drive is indicated by an increments motor signal, it will be in an inactive state and the 7-
motor (MO) is not driven.

The rotary motor (MO) rotates based on this drive signal, and the rotational torque is transferred to the image sensor (MO) via a transmission mechanism (not shown).
The signal is transmitted to the focusing lens (iE) and focus adjustment is performed.

The driving lens (L) output signal output circuit (116)
E) A drive mode signal indicating whether to drive the focusing lens (FL) automatically or manually is output. In this drive mode signal output circuit (116), the switch (FAS) is a changeover switch that manually selects automatic drive or manual drive, and is closed, for example, when automatic drive is selected. The 3-signal circuit (LDC) is connected to the lens circuit (LEC) after it is installed on the photographing lens (LE) side.
Read information given by. The lens circuit (LEC) fixedly records various information such as the aperture value and focal length required by the camera body (BD) for photography, which is the same information as the photographing lens (LE). Various information from this lens circuit (LEC) is used to ensure that this photographic lens (LE) is connected to the camera body (BD) in a state that allows for proper focus adjustment during automatic focusing by transmission of rotational torque from the motor (MO). It contains information indicating whether or not the lens is attached to the lens, that is, whether or not it is possible to focus. Although the details will be explained later, a state in which it is impossible to focus is, for example, a state of macro photography or a situation where a convergence device that does not have a transmission correction function is inserted between the photographing lens (LE) and the camera body (BD). This is the state where it is being done. The discrimination circuit (120) includes a changeover switch (FA
The selection information J5 from S) and the focusable information from the reading circuit (LDC) are determined, and one of the drive mode signals is output. Here, when manual drive is selected by the changeover switch (FAS), the determination circuit (120) outputs a mode signal for manual drive, regardless of whether or not focusing is possible from the reading circuit (LDC). Further, even if focus is not selected by the changeover switch (FAS), a drive mode signal for manual drive is output even if information indicating that focus is not possible is received from the lens circuit (LEC). On the other hand, a drive mode signal for automatic drive is output only when focusing drive is selected by the changeover switch (FAS) and information indicating that focusing is possible is received from the lens circuit (LEC).

A first focusing width signal output circuit (117) and a second focusing width signal outputting circuit (118) each output an 18th and a second focusing width corresponding to the width of the defocus amount from the expected focus position. Outputs 84 times the focusing width. Here, the first and second
The values of the focusing widths are set to predetermined values W that can be considered to be in focus during automatic focusing and manual focusing, respectively, and the first focusing width is narrower than the second focusing width. . The focusing width signal switching circuit (119) is connected to the drive mode signal output circuit (11
When a drive mode signal instructing automatic drive is given from 6), the first focus width signal from the first focus width signal output circuit (117) is given, and a drive mode signal instructing manual drive is given. If given, the second focusing width signal station output circuit (1
18) is alternatively selected, and this selection signal is outputted to the 4-focus determination circuit (113).

Up)! The operation of the automatic focusing camera system having the above configuration will be briefly explained below. First, the selector switch (FAS) is opened and automatic drive is selected. At this time, if information is being given to the camera body via the lens circuit (LEC) regarding whether the photographing lens (iE) is in a state where automatic focusing is possible, the drive mode signal output circuit (116) A drive mode signal indicating automatic drive is output from. Therefore, in this case, the focusing width signal switching circuit (1
19) to the focus determination circuit (113), the first focus width word from the first focus width signal output circuit (117) is selectively given. The focus determination circuit (113) compares this first focus width with the defocus value from the signal control circuit (112) and determines whether the object is in focus or out of focus. At this point, in the case of focus, the focus status display circuit (115) displays the focus state. On the other hand, in the case of out of focus, the focus state display circuit (1
15) and the motor control circuit (114).
), a motor (M
O) starts to be driven, and automatic focusing operation is performed by the motor (MO) until focus is determined by the focus determination circuit (113). Furthermore, when it is determined that the focus is on,
The rotation of the motor (MO) is stopped, and the above-mentioned focus display is performed.

On the other hand, even if the changeover switch (FAS) is open, if there is a state where automatic focusing is not possible due to distance shadow glare (LE), manual drive is indicated from the drive mode signal sunrise circuit (116). The drive mode signal is output. In addition, if the switching switch (FAS) is released and manual drive is selected, manual drive is selected from the drive mode signal output circuit (116) regardless of whether focusing is possible from the photographing lens (LE). The output signal is the driving signal shown. In these cases, the second focus width signal is selectively given from the focus status display circuit (119) to the focus determination circuit (113). compares this second in-focus width with the defocus value from the optical processing circuit (112) and determines whether C is in focus or out of focus.Based on this determination result, in-focus and front focus Alternatively, the focus state of any of the rear bins is displayed by the focus state display circuit (115).At this time, the focus state display circuit (114) is inactivated. According to the display of the focus state by (115), the photographic lens (LE)'s 7.1 lens for lens (Fl) is driven by a single movement operation of the Ministry of Honor.Here,
The second focusing width is wider than the first focusing width and is suitable for manual focusing, so that manual focusing can be easily performed.

In the above explanation, it is assumed that the changeover switch (FAS) is placed on the camera body (BD) side, or that this switch (FAS) is placed on the camera body (BD) side.
S) may be provided on the honor lens (LE) side. In addition, the changeover switch (FAS) and reading circuit (LDC)
and the opening/closing signal from the changeover switch and the photographic lens (
Although the drive mode signal is changed according to both the signal indicating whether automatic focusing is possible or not from The drive mode I signal may be switched by a bow. Further, the present invention is not limited to single-lens reflex cameras with interchangeable lenses, and it goes without saying that the present invention can be applied to cameras in which a photographing lens (LE) is integrated into a camera body (BD).

In the above explanation, a hardware circuit configuration was used to simplify the outline of the present invention, but the functions of the above-mentioned circuit section on the camera body side are based on the microphone controller as described below. This is executed by a combi coater (hereinafter referred to as a microcomputer).

FIG. 2 is a block diagram mainly showing the circuit configuration on the camera body (BD) side described above. In the figure, the camera body (B
A converter (CV) is inserted between D) and the lens (LE) to extend the focal length of the lens (LE) by, for example, 1.4 times or 2 times. The camera body (BD) and converter (CV) each have a connection terminal group (CN1).
and (cN2), and the converter (CV) and lens (LE) are connected through their respective connection terminal groups (CN3) and (C
N4), and various information from the converter (CV) and lens (iE) is given to the camera body (BD) side. Power switch (MAS)
), the power-only reset circuit (POR1), microcontroller (MC1), (MC2), display control circuit (DSC), oscillation circuit (OSC), inverter (IN1) to (IN8), and A1 circuit Power is started to be supplied to (AN1) via the power line (+E). By starting this power supply, the power-on reset circuit (PORl) outputs a reset signal (PO1) and the microcontroller (MC1
), (MC2) and the display control circuit (DSC) are reset. The microcomputer (MC2) is a microcomputer that performs the overall operation of this camera system in a sequential manner, and the microcomputer (MC1) is a microcomputer that performs the overall operation of this camera system in a sequential manner.
This is a microcomputer that sequentially performs focus adjustment operations in response to control signals from the MC2. The operation of the microcomputer (MO2) is not shown in the flowchart of FIG. 3, and the operation of the microcomputer (MC1) is not shown in the flowcharts of FIGS. 8 to 10.

The photometry switch (MES) is opened in the first step when the release button (not shown) is pressed down, and this switch (MES)
When S) is closed, a "High" level signal is given to the input terminal (i0) of the microcomputer (MC2) via the inverter (IN1). In response to this, the microcontroller (M
The terminal (O0) of C2) becomes "High", and the transistor (BT1) becomes conductive via the inverter (IN2). Due to the conduction of this transistor (BT1), the power-on reset circuit (POR3), the photometry circuit (LMC),
Tekota (DEC1), light emitting diode driving transistor (BT3), film sensitivity setting device (SSE), aperture value setting device (ASE), exposure time setting device (TSE)
, exposure control mode setting device (MSE), exposure control device (
EXC), power is started to be supplied to the wrap circuit (LA) via the power supply line (VB). By starting this power supply, the power-on reset circuit (POR3) sends a reset signal (PO
3) is output and the exposure control device (EXC) is relit. In addition, the "High" level signal from the output terminal (O0) of the microcomputer (MC2) is passed through the buffer (BF) as the power supply voltage (VL) of the converter (CV) and lens (LE) to the connection terminal group (CN1), (CN2),
Converter (CV) via (CN3) and (CN4)
The circuit within (CVC) and the circuit within lens (LE)
C) is given. In addition to this power supply terminal, the important connection point is that the output is output from the output terminal (O6) of the microcomputer (MC2) and connected to the Lombarder circuit (CVC) and lens circuit (IE).
A signal transmission terminal for releasing the microcomputer (MC2) from the reset state, a synchronization clock pulse transmission terminal from the clock output terminal (SCO) of the microcomputer (MC2), a terminal for transmitting a synchronizing clock pulse from the microcomputer (MC2) clock output terminal (SCO),
2) Connect an inharter (C) to the serial data input terminal (SD1).
V), a signal input terminal for inputting data from the lens (LE), and a ground terminal. In addition, the microcomputer (
Figure 4 shows the circuit configuration of the serial data input section of MC2), which includes the converter (CV) circuit (CVC) and lens (LE).
) The circuit configuration of the circuit (LEC) is not shown in FIG.

The photometric circuit (LMC) provides an analog value photometric signal to the analog input terminal (ANI) of the microcomputer (MC2), and provides a reference voltage signal for DA conversion to the reference voltage input terminal (VR). The microcontroller (MC2) is a light metering circuit (LMC).
), the analog photometric signal input to the terminal (ANI) is converted into a digital signal based on the reference voltage signal from the terminal (ANI). The display control circuit (DSC) controls the liquid crystal display section (DSC) according to various data input via the data bus (DB).
P) displays the exposure control value, and the light emitting diodes (LD10) to (LD1n) display warnings and the like. The output terminal (O8) of the microcomputer (MC2) remains "High" from the time the photometry switch (MES) is closed until the exposure control operation of the camera starts, and the transistor (O8) is turned on by the inverter (IN8). BT3) indicates that the light emitting diodes (LD10) to (LD1n) can emit light only during this period.

The TV (DEC1) outputs the device (M) according to the signal given from the output port (OP1) of the microcomputer (MC2).
SE), (TSE), (ASE), (SSE), circuit (
The output terminal (
a0) to (an+1). For example, a microcomputer (M
C2) or exposure control mode data, the output terminal (a0
) becomes “High”, the data bus (DB
), the exposure control mode setting device (MSE) outputs data indicating the set exposure control mode, and this data is input to the input/output port (I/O) of the microcomputer (MC2). Similarly, when continuing to set the aperture value, the terminal (a2) becomes "High".

When sending display data to the display control circuit (DSC), one of the terminals (a4) to (an) becomes "High" depending on the data to be sent. In addition, when sending lens conversion coefficient data (KD), which will be described later, input/output port (I/O)
After outputting the conversion coefficient data to the data bus (DB), specific data is output to the output port (OP1) for a certain period of time, and the conversion coefficient data is latched into the latch circuit (LA) by a pulse from the terminal (an+1).

The exposure control device (EXC) starts the following exposure control operation when a "High" interrupt signal is given to the interrupt signal input terminal (it) of the microcomputer (MC2), and the release circuit , a mirror drive circuit, an aperture control circuit, and an exposure time control circuit. This device (
When a pulse is output from the output terminal (O4) of the microcomputer (MC2), EXC) takes in the aperture step number data that is output to the data bus (DB), activates the release circuit, and starts exposure control operation. . After a certain period of time has elapsed from the start of the exposure control operation, exposure data is transferred from the microcomputer (MC2) to the data bus (DB) and is transferred to the terminal (O5).
) a pulse is output.

As a result, the exposure control device (EXC) takes in the exposure time data, operates the mirror drive circuit to start raising the reflecting mirror, and operates the aperture control circuit to narrow down the aperture by the number of aperture steps. When the reflection mirror has finished rising, the front curtain of the shutter starts running. At the same time, when the count switch (COS) is closed, the exposure time control circuit is activated and starts counting the time corresponding to the exposure time data. When the count is completed, the seedling starts to move after the shutter, the aperture is closed, and the lower part of the mirror closes to complete the exposure control operation.

The release switch (RLS) is closed in the second step of pressing down the release button, and this switch (RLS)
When the inverter (IN3) is opened, the output of the inverter (IN3), that is, one input terminal of the AND circuit (AN1) becomes "High". The switch (EES) is closed when the exposure control operation is completed, and is opened when the exposure control mechanism (not shown) is activated. The signal is sent to the microcomputer (MC) via the inverter (IN4) based on the open/closed status of this switch.
2) and the other input terminal of the AND circuit (AN1).

Furthermore, the output terminal of the AND circuit (AN1) is connected to the microcomputer (MC2).
) is connected to the interrupt signal input terminal (it). Therefore, if the exposure control mechanism is not fully charged,
The gate of the AND circuit (AN1) is closed, and even if the release switch (RLS) is not opened, the AND circuit (A
The output of N1) remains "Low". That is, no interrupt signal is input to the microcomputer (MC2), and no exposure control operation is started. On the other hand, when the exposure control mechanism has completed charging, the gate of the AND circuit (AN1) is open, and when the release switch (RLS) is opened, the output of the AND circuit (AN1) becomes "Hiah". Then, an interrupt signal is input to the interrupt terminal (it) of the microcomputer (MC2), and the microcomputer (MC2) immediately shifts to exposure control operation.

Output terminals (O1), (O2), (
O3) is the input terminal (i1) of the microcomputer (MC1).
1), (i12), and (i13). Here, the output terminal (O1) becomes "High" when the microcomputer (MC1) performs the focus detection operation, and becomes "Low" when the focus detection operation is not performed. The output terminal (O2) is set to "High" when an interchangeable lens is attached that is configured to extend the focus lens (FL) when the motor (MO) is rotated clockwise;
) for an interchangeable lens that is extended by rotating counterclockwise, it becomes "Low". The output terminal (O3) is capable of focusing only in accordance with the method (hereinafter referred to as the preticle method) in which the focusing lens is driven toward the in-focus position based on the amount of deviation from the in-focus position and the defocus direction. In the case of an interchangeable lens where the In the case of an interchangeable lens whose focus is adjusted in combination with the predictor method, the value is "High". Switch (FA
S) is opened and closed by a manual switching member (not shown), and the AF
It is opened when the mode is selected, and released when the FA mode is selected.

The open/close signal of this switch (FAS) is sent to the inverter (IN
6) to the input terminal (i1) of the C microcomputer (MC2) and the input terminal (i14) of the microcomputer (MC1).

The output terminal (O16) of the microcomputer (MC1) is connected to the base of the transistor (BT2) via an inverter (IN5). Therefore, the terminal (O16) is “High”
h”, the transistor (BT2) becomes conductive and the power-on reset circuit (PO2) and focus detection light receiving section (F
LM), light receiver control circuit (COT), motor drive circuit (MDR), encoder (ENC), and light emitting tie auto drive circuit (FAD) via the power supply line (VF). With the start of this power supply, the power-on reset circuit (POR2) outputs a relet signal (PO2).

The light emitting diode drive circuit (FTD) has a circuit configuration as shown in Fig. 6, for example, and the microcomputer (MC1)
output port (OP0), that is, output terminal (O17), (
The light emitting diodes (LD0), (LD1), and (LD2) are driven according to the data output from Oi8) and (O19). With this circuit configuration, when any one of the output terminals (O17), (O18), and (O19) of the microcomputer (MCI) becomes "High", the light emitting diode (LD0) for displaying the front bin and the light emitting diode for displaying the focus are activated. Diode (LD
1) Any one of the rear bin display light-emitting lights (LD2) lights up to display front focus, focus, or rear bin. Furthermore, when the two terminals of the output terminals (O17) and (O19) become "Hing", the light emitting diode (LD0) is activated based on the clock pulse (CP) from the optical wall circuit (OSC).
) and (LD2) blink at the same time to indicate that focus cannot be detected. Table 1 shows its operating status.

The focus detection light receiving unit (FLM) is a CCD (Charge Coupled Dev) equipped with multiple light receiving units for focus detection.
ice). The control circuit (CO1) controls the CCD (FLM) based on the signal from the engine (1C1).
), A-D conversion of the CCD output, and transmission of the A-D conversion output to the microcomputer (MC4).

In addition, a pulse signal for starting the integration operation of the CCD (FlM) from the input (MCI) to the suppression circuit (GOT) is sent from the output terminal (0IO) to the output terminal (01l).
) outputs a pulse signal to forcibly stop this integral operation.

In addition, the control circuit (00l) for the microcomputer (MC1)
This indicates that the integration operation at C0D (F[\) has been completed, and the A-D conversion operation 1 of the accumulated charge is sent to the υ included terminal (1t) for each light receiving element of the CCD (1LM). The above A-0 is input to the input terminal (ilO) to reduce the completion of T.
The converted data are respectively input to the input boat (It0).

Furthermore, from the CG circuit ([to 1)], the reset signal is sent to the terminal (ΦR), the transfer signal is sent to the terminal (Φ[), and the transfer signal is sent to the terminal (Φ[)]. $1), (Φ2
), (*3), the reference position is input to the terminal (ANB), CC) (F1N) to the control circuit (COT), and the terminal (A\B) A potential corresponding to the amount of charge accumulated in each light receiving section is output from the terminal (A01). The specific circuit development of this control circuit (COT) will be described in detail in FIG. 14, which will be described later.

Here, to briefly explain the operation of CC) (FL\), control circuit 1 (COT), and icon (lC1), the control circuit (cor
) responds to the integration start signal from the output terminal (010) of the microcomputer (ICI), reloads C and CCD (L), and reloads the CCD (FJ+) with the signal, while at the same time resetting the reference potential. Rieru Nobunori (CC) (FIM). CCD
In each light-receiving section (F[, M), the accumulated power increases in accordance with the amount of light received, and as a result, the potential output from the terminal (13) decreases slightly.

When the control circuit (C0T) reaches the level of the terminal (A\3) or a predetermined value, it outputs a transfer command signal to the CC (F1v) and transfers the accumulated charge in each light receiving part of the CCD (FLM) to the CCD (F1v).
At the same time, the integration completion signal is sent to the interrupt terminal (it) of the microcomputer (ICI). Then, the control circuit (COr) is C0D(:LM)
The accumulated charges transferred to the transfer gates of 91, Φ2, φ3
A-) is converted based on the transfer clock of 1
Each time the A/D conversion of the accumulated charges in one light receiving section is completed, an A/D conversion completion signal is given to the input terminal (ilO) of the microcomputer (MCI). In response to this signal, Maifun (νC1) takes in the Yatsukawa-transformed data from input capo-1 (]Po). And the microcomputer (MCI) is C0D
(111)'s number of light-receiving elements A]] Once the converted data is imported, the CCI output is not imported.

%Oh, if the microcomputer (Nc1) does not input an interrupt signal even after a certain period of time has passed since the start of integration, it sends a pulse to forcibly stop the integration operation of the microcomputer (Nc1).
Output from terminal (011) of C1). Control circuit (CO
r) responds to this pulse and sends a transfer command signal from the C terminal (Ql), outputs an interrupt signal to the microcomputer (Vc1), and performs A-D conversion of the CCD output of the front small.
Perform data transfer operations.

The motor drive circuit (1DR) drives the motor (XO) based on signals given from the output terminals (012), (01'), and (014) of the mine (IC1). still,
output terminal (012) of the output terminal (vc1) or “High
”, the motor (10) moves in the 1st direction, and the output terminal (0
13) The cutting edge motor (MO) at "High°" is driven in the counterclockwise cutting direction, and when the output terminals (012) and (013) are both low, the motor (ν0) is stopped. Furthermore, the output terminal (014) of the microcomputer (MC1) is “Hi”.
gh”, the motor (VO) is driven at high speed 4, “LO”
W", the motor is driven at low speed. This motor control circuit (l
A specific example of DR) is disclosed in Japanese Patent Application No. 57-1.
Although the application was filed under No. 36772, the description thereof will be omitted as it is unrelated to the gist of the present invention.

] EhC is a transmission mechanism (L) on the camera body side that transmits one torque of rotation of the motor (MO) to the lens.
MD) The amount of displacement is controlled by, for example, a photocoupler, and a number of pulses proportional to the driving force is output.

This pulse is sent to the microcomputer (+C+) glue input terminal (
DCL) is input to the motor control circuit (voR) and the one-value ECD is used for counter interrupt in the flow of multiple microcontrollers (IC1). The rotational speed of the seven-liter motor (MO) is controlled according to the pulse width.

FIG. 3 is a reflow chart showing operation 4 of the microcomputer (%C2) in FIG. 2. The operations of the microcomputer (MC2) can be roughly classified into the following three types. The #1 twin peak step starts with the opening of the power switch (1AS).
This is the main flow in which the photometry switch (IES) is closed (#2), power supply starts to circuits other than the focus adjustment circuit (p4), and the camera body (3D
) Read the exposure control information set in (65), read the data from the lens (-E), and the conharc (Cy) (
#6~#12), Continuation of Side Light Town (Go13.bl) A7-1~. Automatic setting of FA7-1 (rod 1i-tsubo 27), sister-in-law of exposure control value (u28), u:hi display (g31. go 3)
2) Repeat the above steps. The steps after G4j are performed according to the timer signal periodically output from the timer built into the microcomputer (MC2), so that even if the photometry switch (4IS) is opened, the main flow continues for a predetermined period of time (for example, 15 seconds). There is a code (C) for a timer interrupt to make the value 1. Further, Stella/ of ≦59 or later is a release interrupt no-low for starting the exposure control operation of the camera by opening the release switch (RLS). Below, based on Figures 3 to 6, the microcomputer (IC2
) The operation 4h of the camera system shown in FIG. 2 will be described below.

In response to the opening of the power switch (1AS), the pano-on reset circuit (PO dog 1) outputs a power signal g (PO
l) is output. In response to this POl, the microcomputer (MC2) performs the reset operation 83 in the main flow at step #1. Photometering switch (ME
S) is closed, and when it is determined that the input terminal (10) is at °High, the tie ma-J is made inclination #3), and the terminal (00)
is set to 'High' (Go 4).This makes the transistor (RTI) conductive and supplies power from the power line (VB) to the power line (Vl) via the buffer (B').
From there, power supply to the converter (C\) and the interchangeable lens (LE) starts.

In step #5, the exposure control mode I setting device (MSE
), exposure time setting (1S), aperture value setting device (8st), and film sensitivity setting device (33). )
will be taken in sequentially.

In steps 7G to 12, first set i to register A.
- The terminal (06) is set to “O°” and the terminal (06) is set to “O°”.
gh” and the converter circuit (CVC) and lens circuit (1EC) are released from the rehisotobutsu state (79).Next, ]1° is added to the contents of register A (#10),
It is determined whether the content has reached AC (constant value). Here, if τ, (A)yAC, the process returns to =72 (, the next data is taken in again. (A)-
AC Koniruto, Lens (IE) and “Shibata” (CV)
Since the data acquisition has been completed, the output seat (06) is set to Low degree (#12), and the converter circuit (CVC) and lens circuit (LEC) are reset.

Here, a specific example of the k-inclusion of the 7-ta from the lens (IE) and the conharc (CV) will be quickly explained with reference to FIGS. 4 and 54. Serial data input section 1 in Figure 4, for example E3
When inputting serial data of P1, output terminal (S
8 glue blocks are output from CO), and the serial 7 units inputted at the falling edge of this glue pulse are sequentially read. At the same time, the serial gator input hanger (SlIN) hits the fritsano button (FF1) and releases the reset 1 state of the high-level counter (COI) of the third F. At the same time, the clock pulse ()l, which is applied to the gate of the circuit (Ai7) and frequency-divided within the microcontroller (MC2), is output as a synchronization clock output (SC○
) to two inverter (CV), len (LE)) circuit (CV
C).

(LFC). Also, this signal is sent to the counter (Cod) and shift register (SRI) input terminal. The shift 1 node (SRi) is activated by the clock pulse (Dt) and the microcomputer (MC).
2) The data input to the input terminal (St[) is sequentially inputted into R. Here, the period from when the counter (COl) 1↑ to the terminal (CY) U, 8 clock pulses (DP) or the pano input to the next input L pulse (Dl) becomes "High°". On the other hand, this i!1 output is input to the -power input terminal of the circuit (ANl), or the clock pulse (1l) is input to the other input terminal via the inverter (1j1). , AND circuit (8N5)
is “H” at the falling edge of the 8th pulse (DI).
igl”, resets the flip knob (FF1) and resets the counter (CO4).
Therefore, the output j of the AND circuit (AN5) is also the same as that of the counter (C
When one end P(CY) of O1) becomes "Low", it becomes "lOW" and prepares for the next operation. The "Higl" pulse from this A1 circuit (Al5) turns the serial input flag SIIL to determine whether the footer input is complete, and the microcomputer (MC2), the S2 register (SR4), and the internal J-T bus (IDB) The data appearing in the register M(A) is stored in a predetermined register M(A).

In the 5th figure, the side from the dashed line is m heart (C\
) is the Ninhart circuit (CVC), and the right side or lens (
There is a lens circuit (LEc) c of L2). Microcomputer (1c
When the output terminal (06) of 2) goes high, the counter (CO3).

(CO5), (Co7), (Co9) reset [state or release] These counters are clock pulses (DP) given from the output terminal (sco) of Myin (=12)
It is possible to count 4r. The three binary counters (Co3) and (Co7) check the rising edge of the second clock pulse (DP), and start the next clock pulse (DI) from the rising edge of the eighth clock pulse. The terminal (CY) is set to ``High°'' until
Nizuru. 4-human 1-higher high-quality cow (CO5), (
CO9) calculates the rising edge of this carry terminal (CY) by 1, and every time the first pulse of the three Norikotsu pulses rises, the counter (O!l) and the counting 1 of (Co9) increase by 1. .

The ROM (F01) of the first heart circuit (CVC) or the register is specified directly based on the count of the counter (CO3).
3) Based on the count value of l register (CO4), the decoder (DE9) and data register (O3+) are moved to indirectly specify the register of t. RON (ROl),
(103) Depending on the output of the lens (T), the converter (C input), and the decoder (DFl), either output or series addition circuit (A
11) The output of the sum of both sums added together is selectively outputted as "O" data. Here, focus F
Counter for lenses with fixed ratio (CO9)
Table 2 shows the relationship between the decoder (l-9) and the ROM (l03), and Table S shows the above relationship in the case of focal Q distance or variable zoom lens. Also, the counter (C
Table 4 shows the relationship between the decoder (DE5), the PON (RO1), and the output data to the camera body. Incidentally, ψ indicates that the data of each filler 1 may be 0° or 1.

Outputs (bO) of counters (Co3) and (Co7), (b
1) and (b2) are decoders (DE3).

(DE7) and a decoder (DE3).

(DE7) outputs the J- signal shown in Table 5 in response to this input data.

Accordingly, τ, where the clock pulse stands, R○1(R
3) The data is sequentially 1 bit 1 starting from the lowest hitter (rO).
Each AND circuit (A2O) ~ (A27), 7I circuit (
OR5) and ROI(
The f-ta of ROl) is also sequentially output one bit from the lowest bit (eo) at each rising edge of the clock pulse via the AND circuits (8 to 10) to (8 to 17) and the OR circuit (OR1). Ru. Further, in the case of a zoom lens, a code desk (FC1) or a lens circuit (LIC) that outputs five pieces of data corresponding to the focal length set by operating the zoom link (ZR) is provided. 7-Ta selector (DSI) 1, Tecoder (DF9) output (h4) °
The l-ta of “0000h3h2h1h0” at the cutting input terminal (α1) of “Low” is also set to “H”.
h2h1h0 from the input terminal (α2) when
By outputting the data of ＊＊＊＊＊' (* is the arc of the code opposite), 7 dresses of R○1 (RO3) are sufficient.

If the output of the counter (CO9) is '0000', RO
The 71st address of ~ (RO3) address “○○H” (H indicates a hexadecimal number) stores 。1tsukura-yu,
This data is common to all types of interchangeable lenses (for example, 01010101). This place,
If a converter (CV) is installed between the camera body (BD) and lens (LE), the nonce (LE)
The data '01010101'' sent from The data is sent directly to the camera body and read into the microcomputer (XC2) from the input terminal (SDI). If it is determined by this check arc that an interchangeable lens 4C is attached, the exposure metering mode 1 is set and the exposure control device (EXC) performs aperture control. On the other hand, if it is determined that an interchangeable lens is not attached,
The aperture metering mode is set to I, and the aperture control is not performed.

Output of counter (CO5), (Co9) “0001”
Then, address 'O1 of lens ROM (RO3)
H is specified, and open aperture value data Avo is output from the ROM (RO3). Note that in the case of a zoom lens equipped with an optical system in which the aperture value changes depending on the set focal length, the maximum aperture value at the best focal length of 1 is output directly. Furthermore, constant value data β corresponding to the change in the open aperture value of the lens due to the attachment of the converter (CV) is stored at address "1H" of the ROM (R01) of the converter (C input). When the terminal (gO) of the decoder (DF5) is set to “High”, the arcs from the ROMs (RO1) and (RO3) are added in the series mourning circuit (AI1), and (AVO+β) is used, and this arc is A side 1 circuit (A side 30), OR circuit (
0R3). Counter (COl), (
When the output of CO9) becomes “0010”, the output of ROM (RO
3) and (RO1) are each designated with address "02N". Using the minimum aperture data AImaX from the lens ROM (RO3) and the arc β from the converter ROt (RO1), Avm
If the data of lX-β is installed again, then AV
The arc of maX is released.

The output of the counter (Coi), (C09) is “0011”
Then, the lens ROl (RO3) Alres “03
1° is specified, and data of RO and (RO3)h daylight open photometry errors are output. Here, if a converter is not installed, this data is read directly into the camera itself. On the other hand, when the converter (CV) is installed, all outputs of the decoder (DF5) are "Low" as shown in Table 4, and the output of the OR circuit (0R3) is independent of the arc from the lens. It remains 'Low' and the camera body reads data of 'O' as an aperture metering error.This is because by installing a converter (CV), the aperture becomes relatively small and the aperture metering error is reduced. '0
” This is because it can be assumed that

Count (Co!), (Co9) output is “0100”
Then, ROM(ROl) and (RO3) are respectively '
041'' address is specified.

In the lens ROM (RO3) area "04H",
The motor used to extend the focus lens (FL) (
Data indicating the direction of rotation of the lens M○) and data indicating whether this cross β lens is a type of lens whose exchange coefficient changes depending on the set focal length are stored. For example, in the case of a 5-type lens in which the focusing lens is extended when the motor is rotated clockwise, the lowest bit is ``1'', and when the motor is rotated counterclockwise in the δ direction, the focusing lens is extended by 1 inch. In the case of a men's model, the highest position should be 1° or 0°.
For lenses whose 2-conversion coefficients change, the highest value is 1.
In the case of a type 1 lens that does not change, the least significant bit becomes °○°. This data is converted into a converter (
CV) is inserted into the camera body regardless of whether it is installed.
Ru.

When the output of the counter (CO2) becomes 'o+o+', the output of the second coater (fE9) is 'For a fixed focal length nonce'
00101", "1oo1a" for a zoom lens (, RO1 (RO3) of the lens circuit (LEC) is specified as "05H" or A"001＊＊＊＊＊° amylless. In addition, "* ＊＊＊＊” is the second plate (FC
D) The data is h. In the case of a fixed focal length lens, this address of R○M (103) contains data corresponding to the log2f of the fixed focal length f of that lens, or in the case of a zoom lens, the data corresponding to the log2f of the set focal length of that zoom lens.
Data corresponding to f is stored, and this data is output to the camera body. In addition, Konharta's ROM (R
OL) is specified as address ``5J'', and this Amilless has the controller (CV) connected to the camera body (BD).
The j-tata γ corresponding to the change row 1 of the focal length that changes when the lens is attached between the lens and the interchangeable lens (LE) is stored. At this time, the output terminal (go
) is set to ``High'', so the
), the data obtained by adding the constant direct data γ to the focal length data is sent to the camera body. This H point distance is used for determining camera shake warnings, etc.

When the output of the counter (CO9) reaches 0140 degrees, the field force of the zoom lens and the output of the arcoter (DE9) reach 10 degrees.
The data of 10q' is output and the terminal (h4) is
1", the data from the input terminal α2 of the data selector (DS1) is output. As a result, the data from the ROM (
RO3) is designated with the address of "O4O*******". This address contains data AAI of the amount of change in aperture value from the aperture value at the shortest focal length when the focal length of the zoom lens is changed from the shortest focal length, or is written in C according to the set focal length. Also, for fixed focal length lenses, AAV
=O, so the data of °O'' is stored in the address "06H".This data is sent as is to the Nomera main body regardless of whether the converter (CV) is installed or not. The data is an operator (BI-7■0-AA+)-Avo for removing the aperture component from the 1-radiometry light data
-AAI and 6 Used in the calculation A\-A■0-AAI for controlling the effective aperture to a constant or stopped aperture.

When the output of the counter (CO9) becomes "0111", in the case of a zoom lens, the output of the counter (DE9) becomes "104".
4Φ゛゛, ROM (RO3) is °011＊＊＊＊＊
” is specified. This amyres stores conversion coefficient data KD corresponding to the set focal length. Also, for fixed focal length lenses, ROl(RO
3) is the address "07H" designated 1, and fixed conversion coefficient data KI is stored at this address. If a converter is installed, which has a built-in mechanical transmission mechanism that compensates for changes in the conversion coefficient, this data is transmitted to the body as is.

The data KD of this conversion coefficient is obtained by converting the differential A-cus |ΔL| extracted by the microcomputer (MCI) to |ΔL| used for.

Also, if the data of the conversion coefficient is 8 bits, for example. It is divided into an exponent part of L position 4 bits and 1, and a significant figure part of lower 4 bits, and are coded as shown in Table 6.

The conversion coefficient data KD is KD=(k3・2°+k2・2−1+k1・2−2+k
O・2-3)・2n・2m m=k4・20+k5・2”+kO・22+k7・23 n=−fixed weight (for example, −7). Note that since k3 is the most significant pit in the significant figure part, it is always "1". Therefore, by executing such a code, even if the value of KD changes over a fairly wide range, it can be stored as data with a small number of pins, which is easy to calculate within the microcomputer (MCI).

Figure 7 is a graph showing the relationship between conversion coefficient data output from a zoom lens and focal length, and the horizontal axis is lo
g2f, and the vertical axis corresponds to the conversion coefficient KD.

However, UKD is a straight line A depending on the focal length f.

Although it changes continuously as shown in B and C, in the case of this example, the value of KD is set as a discrete value of 1 to 33 (according to broken lines A', B', and C'). There is.

Here, when K1=2°, KD="01111000", K2=
In the case of 2-1+2-2 and 2-3+2-4, KD=”011
01111″, K if K3=2-1+2-2+2-3
D=”01101110”, K4=2-1+2-2+2
-4, KD="01101101", K31=2-
In the case of 4+2-6, KD="00101000", K32
=2-4+2-7, KD="00111001",
When K33=2-5, KD="00101000".

The focal length of a zoom lens is divided into many regions by a code plate (FCD). For example, a lens that changes by A is divided into nine zones from f17 to f25. With this configuration, if it is an f25 zone, the data closest to the smallest value within that zone and having a small value will be 17, and if it is an f24 zone, it will be K16. K15 for zone l23. If the zone is f22, the zone K3 is output.

The reason for setting the value of KI in this way is as follows. In other words, if KI is set to a value larger than the actual data, N-KDX1Δl will be larger than the number of pulses of the encoder (E to C) that corresponds to the driving amount required to drive the focusing lens to the in-focus position. This is because N determined by : becomes larger, and as a result, the lens passes through the in-focus position, causing the lens to hunt before and after the in-focus position. Therefore, if KD is set to a small value, the focus position will gradually approach from one direction, and the actual KD will gradually approach the in-focus position from one direction.
I tried to make the difference with D as small as possible, so
The time it takes for the focusing lens to reach the in-focus position can be shortened.

In addition, if the value of KI is always set to a small value, the actual KD
It may happen that the difference between the value of It is also possible to provide a slight area where the value is slightly larger than the value of , so that the distance τ from the in-focus position is slightly better.

There are also zoom lenses whose conversion coefficients change significantly depending on the decoy distance, as shown by the solid line C (∞) when the shooting distance is infinite, and the dashed line C (near) when the shooting distance is close. With this zoom lens, for example, when the shooting distance changes from the infinite position to the closest position in the focal length f1 zone, KD=ki
7=2-2h changes to KD=K15=2-2+2-4. In order to be compatible with such a zoom lens, in this embodiment, only the data of the conversion coefficient at the infinity position is stored in the ROM (RO3), and the area near the focusing range (hereinafter referred to as near focus) is stored in the ROM (RO3). until reaching the focal zone), Δl
Based on the positive and negative (i.e., defocus direction) signal loops of C) A-Dus lens is driven, and when it enters the near focus zone, based on the value of N found from the above KD and 1 to Ll. In addition to the code board (FCD) for the focal length, a coat board for the set shooting distance is provided separately, and these code boards are used to control the area of the ROM (RO3). Although it is possible to specify and obtain accurate conversion coefficient data, it is not practical because it increases the number of parts, the number of pins for addressing, and the capacity of the ROM.

Furthermore, there is a zoom lens that is configured so that macro photography can be performed by moving the zoom link, for example, to a shorter focus side than the position of the shortest focal length. The mechanism of this zoom lens will be explained later based on FIGS. 18 to 23. For such a zoom lens, in this embodiment, when switching to macro photography, data of '11111' is output from the code board (FCD), and data of '11111' is output from the code board (FCD), and a specific address '
01111111" is specified. In the case of Macro I shadow, the Q position of the pupil diameter changes, the depth of focus becomes shallow, and the aperture value becomes dark, making it difficult to adjust the focus using AF mode. Therefore, the address is “Φφ
ψφ0110" data is stored, and its k3 is "0". The microcomputer (MC2) uses this data to determine that the macro photography has been switched, and activates the AF mode using the switch (FAS). [Automatically switches the focus adjustment mode to A mode.

Furthermore, there are zoom lenses that are configured such that switching to micro photography cannot be performed unless the photographing distance is set to the closest position. The mechanism of this lens will be described later with reference to FIG.

In the case of such a lens, the switch (MCS) shown in Fig. 5 is closed when switching to Macro photography. Inverter (IN17) and inverter (I to 19) are turned to outputs of AND circuits (AN40) to (AN44).
w". This specifies the address "01100000" of the ROM (R03).

This Amirres stores the data "Φφφφ0100" as KI, and the microcomputer (Mcl) determines that the switching operation to macro photography has been performed based on this data k3-kl=Q and automatically shoots the image. Maneuver the focusing lens by rotating the motor 4 times so that the lens is at the closest position.

The light receiving section for focus detection is designed to look at a fixed exit pupil where the photographic lens is located, and awards are given based on the diameter of this hole and the position of the pupil that emerges from the light receiving element (a position equivalent to the film surface). It is determined whether the light-receiving element receives the light from the subject that has passed through the lens.

Therefore, depending on the lens, there are some lenses in which light does not enter a part of the light receiving section. With such lenses, even if focus detection is performed, it is not reliable, so go to F mode or FA.
It is preferable not to operate the mode. Therefore, in the case of such a lens, the address of RO4 (R03) (
'011＊＊＊＊＊'' for a zoom lens, '00000111' for a fixed focal length lens ゛ψΦφψooo1
” data as KD (. Microcomputer (MC)
2) This data is used to prevent the microcomputer (MCI) from performing a focus detection operation in the 8 mode or the [A mode] in step #16-2, which will be described later.

In addition, by macro switching, the circuit (40 to A) to (A) is connected to A1.
AN44) to °ooooo” or “11111”
When the data of R0M (RO3) is output
Addresses "00100000" and "00111111° store data corresponding to the focal length f during macro photography, and addresses °07000000" and "01017717" store data corresponding to AV during macro photography.
Each is output from the ROM (RO3).

Also, 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, the KD "ψψφψ0110" is used in the same way as when switching to macro photography.
” is stored, and only FA mode is possible.

Furthermore, in the case of a converter that does not have a transmission mechanism like the above-mentioned lens, the output of the counter (CO2) is "0".
411”, the ROM (ROI) reads “φφΦ
Φ0110” is output, and only the terminal (gl) of the decoder (DE5) becomes “High” and the ROM (ROI
) so that the data from the camera is transmitted to the camera body.
No matter what kind of interchangeable lens is attached, only "A mode" operation will be performed.

When inserting a converter between the camera body and an interchangeable lens, the focal length changes depending on the converter, so
It is necessary to install a deceleration mechanism in the converter to reduce the amount of rotation of the drive shaft of the camera body I etc. in response to the increase m. In other words, if the converter is equipped with a mechanism tab that transmits the amount of rotation of the drive shaft of the camera body directly to the drive shaft of the A-scrap lens, the KD of the lens is transmitted directly to the camera body and N=KD×|ΔL |If you rotate the drive axis of the dip camera body, there is a problem that the dip camera will shift from the focus position by an amount corresponding to the increase in focal length. Therefore, in this embodiment, for a converter that does not have the above-mentioned speed reduction mechanism, for example, a converter with a focal length of 1.4 @ has a KD of 1/2, and a converter with a focal length of 2x has a KD of 1/2.
/4, from the exponent part data (k7k6k5k4) of the upper 4 bits of Tere Sore KD, 1 is subtracted for a 1.4 times converter, and 2 is subtracted for a 2 times converter.

In Figure 5, the output of the counter (CO5) is "100".
0”, the converter circuit (CV
Check data "01010101" indicating that the converter (CV) is installed is output from the ROM (RO1) in C).

At this time, the terminal (J1) of the dataer (DE5)
h", this check data is sent to the camera body (1D) via the AND circuit (AN31) and the OR circuit (OR3), regardless of the data from the RON (RO3) of the lens circuit (LEC). It will be done.

When the output of the counter (CO5) reaches '1ooi°, the aperture value data Avl, which is determined based on the vignetting of light due to the restriction of the luminous flux by installing this converter, is stored in the ROM (
RO1) and output from the ant circuit (RO1) in the same manner as described above.
AN31) and is sent to the camera body via the OR circuit (OR3). This data AVI is compared with data Avo+β of the open aperture value by a microcomputer (MC2). Avo+
When B<Avl, the photometric output is By-Av1, so (By-Avl)+Avl=Bv and the aperture stage number footer AV-(AVO+β) are calculated.

As described above, the lens (lE) and the converter (
When the import of data from the CV) is completed, in the flowchart of FIG. 3, the output of the photometry circuit (LNC) is converted from A to D (413), and the data of the photometry output after the A to D conversion is converted. is stored in the specified register (#
13).

At step Sasa 15, it is determined whether the release flag RLF is "1" or not, and when this flag is "1", #28
If the value is "0", the process goes through steps #16 to #26 and then goes to step #28.

Here, the release flag RLF is the release switch (
This flag is set to "1" when the exposure control value of the camera is being calculated when the interrupt operation after step #59 is performed after RLS) is closed. Note that #6 indicates that the exposure control value is not calculated during this interrupt operation.
If it is determined in step 3, the second data is taken in in step #5 and thereafter, and if RLF=1 in step #15, A is determined in step #1G and subsequent steps.
After jumping the focus detection operation flow in F and FA modes and performing exposure calculation in step #28, step #3
Exposure control is performed in steps #G4 and subsequent steps through step #0.

In the Sasa 1θ step, 100 determinations are made as to whether focus detection operation in AF mode or FA mode is possible.
Move to step 28. In this step, we check whether the lens is attached (#16-1) and whether the conditions determined by the diameter and position of the exit pupil are compatible with the light receiving section (#16-1).
16-2), Determining whether light from the subject is incident on all C light receiving sections for focus detection (#+6-3), and whether or not the photometry switch is open (#16-5) are performed sequentially.

Here, if the check data 'o1oioioi' is not input (Sasa 16-1), the KD data is 3~k.
When Q is "oooi" (Sasa 46-2), the diameter of the exit pupil of the lens is small and the open aperture value Avo, Avo 1β, A
VO → AAV or JAvl is a constant aperture value [for example, 5 (F
5.6)] If larger than Avc (#16-3),
Since the focus detection operation in both AFt-mode and FA mode is impossible, after the display control circuit (DSC) displays a warning that the focus detection operation will not be performed in step #16-4, step #28 is performed. Move to step. Also, the photometry switch (MES) is open (10)
When is '1ow'(#16-5), the process moves to step #28 in order to perform only FA mode operation for 15 seconds.

Input check data, k3~kO≠“0001”, A
vo, AVO+β, AVO+AV or Av1≦Avc
, (io) are both determined to be "High", the process moves to steps #17 and subsequent steps.

At step =17, the output terminal (01) is set to "Highl".
”, and the microcomputer (MCI) is connected to the input terminal (ill
) starts the focus detection operation in AF and FA modes.
The conversion coefficient data KD read into C2) is input/output
1 (I/O) to the data bus, and the latch circuit (
LA). The data latched by this latch circuit (1-A) is sent to the microcomputer (MC1) at No.
, 93.

In step #19, the output of the counter (CO9) is '
Based on the data read in "04OO", it is determined whether the attached lens is a type of lens whose conversion coefficient KD changes according to the shooting distance. If the lens has a conversion coefficient KD that changes, the microcomputer MC2) output terminal (o3
) That is, the input terminal (!13) of the microcomputer (MCi) is 'H.
If the lens does not change, set it to 'LOW'.

The microcomputer (IC1) uses this signal to switch the operation in the F mode to be described later.

Similarly, in step CO22, the counter (CO9) is “0”.
The direction of rotation of the motor (MQ) when feeding the Fornos movement is determined based on the data read when the speed is 100". Here, if it is clockwise, the microcomputer (MC
2) output terminal (o2), that is, input terminal (i12) of the microcomputer (MCi), is set to "High", and if the direction is counterclockwise, set to "LOW". The microcontroller (MCi) connects this terminal (i
12) and the defocus direction signal determine the rotation direction of the motor (MO).

In step 25, by detecting whether the third bit k3 of the conversion coefficient data KD is "1" or "0",
AF with attached converter (CV) and lens (LF)
It is determined whether or not the focus A section fishing operation is possible depending on the mode. At this time, if k3-1, the 8 [mode is possible, so the flag MFF is set to 0" and the process moves to step 28. On the other hand, if k3=0, the AF mode is not possible, so the MFF
is set to "1", and then the switch (FAS) detects whether mode I, AF or FA, is selected.
11) is 'High', the display control circuit (DSC) indicates that F mode 1 has been set by the honoree and Ub will automatically switch to FA mode (a warning will be displayed and # Move to step 28. Input terminal (1
If 1) is 'LOW', the FA mote is originally selected, so the process moves directly to step #28.

In step 28, a known exposure calculation is performed based on the set exposure control value, photometry value, and data from the lens read in steps #5 to #14, and data on exposure time and aperture value are calculated. Set flag LMF to "1".

In step #30, it is determined whether the release flag RLF is "1" or not, and when it is "1", the flow returns to the exposure control operation flow of steps after #64, and when it is "o", it moves to step #31. do. In step #31, the output terminal (
08) makes the inverter (lN8) conductive to the transistor (Br3), and the light emitting diodes (LD1o) to (LD1n) display a warning.The exposure control value is displayed on the liquid crystal display (DSP). display.

Step 33 determines whether the photometry switch (M=S) is open or closed. Now, if the photometry switch (YES) is closed and (io) is "High", set the data for 15 seconds call 1 for timer interrupt in the timer register Tc (#34) , starts the evening ear (#35), enables timer interrupt (93B), and returns to step 2. In this case, (10) is “
Higl'' (photometering switch (YES) remains open), the process immediately moves to step 3, disables timer interrupt, and repeats the same operation as described above.

On the other hand, the photometry switch (MES) is open (10
) or “Low”, the switch (FAS)
It is determined which mode, F or FA, is selected (step 37), and the mode determined in step 25 is determined based on the data from the NONS (#38).

Here, the input terminal (11) is "LOW'" and the FA mode is selected (#37), or even if the AF mode is selected, the flag MFf is "1" and the lens side is FA mode.
If only the mode can be operated, the process moves to step 40. AF7-1 is selected and the old MFF '0
In this case, the output terminal (01) is set to “Low” (S3
9) to avoid stopping the operation of the microcomputer (4C1), and then proceed to step 40. In addition, p37. In step #3B, when it is determined that it is the A mode, the terminal (01) remains at "High" and shifts to the mode of Sasa 4o, and the operation of the microcomputer (MC1) continues.

In step #40, the open/closed state of the switch (EFS) is determined, and it is determined that the exposure control mechanism has not been fully unlocked (
If 12) is 'High', the process moves to step 47 and performs the operation to return to the initial state, which will be described later.The exposure control mechanism has been reset and (12) is 'LOW'.
In that case, go back to the STELLAR V of 36 and the START of g2, and then either the photometry switch (MES) is closed again and the input terminal (10) becomes "High", or there is a timer interrupt. have.

Now, when there is a timer interrupt, 1 is generated from the contents of register TC.
is subtracted (#45), and it is determined whether the content of Tc has become °O'' (S46). If Tc≠0, ≦5
Moving on to the subsequent steps, the above-mentioned data acquisition, exposure sieving, etc. operations are performed. At this time, if in FA mode,
Since the terminal (01) is “°High”, the microcomputer (MCI)
repeats the operation for EA, and if it is 8 "mo 1", it is #39
Since the terminal (01) is set to 'LOW' in step , the operation of the microcomputer (MCI) is stopped.

On the other hand, when Tc=0, the output terminals (00), (01),
(08) is "Iow" and the transistor (BTl
) and badge 7 (BF), the operation of the microcomputer (MCI) in A mode is stopped, and the power supply is stopped by transistor 1 (Br3). Furthermore, 1 rank display on the liquid crystal display (DSP), flag MFF, L
After resetting the MF, return to step 2.

To summarize the operation below, while the photometry switch (YES) is open, data is captured and the microcontroller (MCI)
), exposure calculation, and display operations are repeated.

Next, when the light metering switch (MYOS) is turned off, in C1 mode, the microcomputer (MCI) operation is immediately stopped and data acquisition, exposure calculation, and display operations are repeated for 15 seconds. When in [At-mode], data is taken in, FA operation is performed by the microcomputer (McI), and exposure calculation is performed.

The display action is repeated for 15 seconds. In addition, if the exposure control mechanism has not been fully loaded, the metering switch (Y
When the ES) is opened, data is imported and the microcontroller (MC)
1) Immediately stop the display and display operations.

In addition, - day, Go 16-4. If C, which displays a warning in step #27-2, no longer needs a warning at the next point in the flow, it is necessary to transmit data for canceling this warning to the display control circuit (+SC). It goes without saying that there is.

Next, the operation when the release switch (RLS) is closed with the exposure 11w mechanism completed charging will be described. In this case, even if the fiducial controller (MC2) is performing the four operations as described above, it immediately performs the release interrupt operation from step #59.

First, in case an interrupt occurs while reading data from the lens, set the terminal (06) to "LOW" and reset the conharc and lens circuits (CVC) and (lEC) (#59). , terminal (01) is set to 'Low'
to stop the AF or FA mode operation by the microcomputer (MCI) (a60). Output terminal (08
) to "Low" and the warning light emitting diode (LD1
After turning off 0) to (ID1n) (61) and setting the release flag RLF to ``1'' (62), determine whether it is the aforementioned 7-lack LMF or ``1'' (*G3).
.

Here, if the 2RA LMF is "1", the generation of the exposure control value has been completed, and the process moves to step #64. On the other hand, if the LMF is "0", the exposure control value has not been fully ejected, so the process moves to steps #5 and subsequent steps, outputs the exposure control value #, and moves to step 64.

Smooth C of #64 uses the data AV-AVO, AV=(AVO+
AAv), AV-(Avo+β), AV-(Avo+β
+ΔAv) is output to the data hash (DB), and a pulse for data acquisition is output from the output terminal (04) (#
65). As a result, the exposure control device (EXC) receives the data on the number of calibration steps, and the exposure control mechanism starts the narrowing down operation, and when the aperture is narrowed down to the loaded number of stops, the narrowing down operation is completed. do.

When a certain period of time has elapsed since the pulse output from the output terminal (04) (Scream 66), the calculated exposure time data 7V is output to the data bus (DB), and the pulse for data acquisition is output from the output terminal (05). is output (#67, 168
). This pulse causes the exposure control device (EXC) to take in data on the exposure time, and the built-in mirror drive circuit starts the mirror-up operation. When the mirror up is completed, the Jagtar front curtain starts running, and the time count corresponding to the exposure distance data acquired by closing the COS starts. When the count ends, the trailing thread of the shutter starts running, and the switch (EES) closes when the running of the trailing curtain is completed, the mirror is lowered, and the aperture is opened.

When the mine (MC2) determines that this switch (EES) is open and the input terminal (02) becomes "High" (69), it re-hits the release flag (RLF) (70). ), it is determined whether the photometric switch (MES) is closed and the input terminal (io) is "High" (Dou 71). Here, if (10) is 'High', the process returns to step #2 and subsequent steps, and the above-mentioned data import, microcomputer (MC1) operation, exposure calculation, and display operation are repeated.On the other hand, in step #71 Photometering switch (M
ES) is open and the input terminal (10) is “low”
If so, move on to the steps after golf and install a microcomputer (M
Set C2) to the initial state and return to step #2.

FIG. 8, FIG. 9, and FIG. 10 are flowcharts showing the operation of the microcomputer (MCI). The operation of the microcomputer (MCI) is roughly divided into the following three flows.

The knob knob after No. 0.1 is the main flow started by the focusing operation command from the controller (MC2).
Start of operation of CCD (FLM) by control circuit (COT) (No. 8), determination of presence or absence of motor rotation (No. 10~
No. 13), CCD measurement of the longest integration time and operation when the longest integration time has elapsed (No. 14 to 19), detection of the end position of the focusing lens and measurement of the longest integration time (N
o, 35-44), motor stop at the end position and restart of rotation at low contrast (No. 43-48, 51-
67), Initial settings when the microcontroller (MCI) stops operating (
No. 25-33), conversion of CCD data at low brightness (
No. 78-80), Calculation of Deno A-dust amount and Tefocus direction (No. 81 to 91), Determination of whether the lens is capable of AF mode operation (No. 92 to 96), Contrast determination (No. 100), motor drive to focus sorter and focus determination in AF mode (No. 12)
5 to 196) (Fig. 9), Focus determination in case of FA mode (No. 240 to 261) (Fig. 10), Operation at low contrast 1 last (No. 105 to 115, 205 to 214)
, operations such as motor drive (Nos. 220 to 232) are performed in the case of a lens that can switch to the Macco prefecture shadow at the closest focusing position.

No. In steps 70-76, the CCD is activated by the CCD integration completion signal sent from the control circuit (COT) to the terminal (1).
This is a flowchart of a terminal interrupt in which a CCD data input operation is performed. Further, steps No. 200 to 20J in FIG. 8 are counter interrupts 20-, in which focusing is determined by outputting a coincidence signal of 1 from the counter ECC via the 1-coater (E\C). Note that once pin interrupts are enabled, the priority order of both interrupt operations is determined so that even if a counter interrupt signal is generated thereafter, the counter interrupt will not be executed until after the pin interrupt operation has finished. ing. The operations of the AF and FA modes in this embodiment will be described below based on this flowchart 1.

First, in response to the closing of the power switch (MAS), a reset signal (PO
1) is output, and this reset signal causes the microcomputer (MC1
) performs a reset operation (No. 1) from a specific address. No. It is determined whether the second step or switch (FAS) is closed and the input terminal (i14) is "High". Here, (i14) is “High”
If so, the AF mode is selected and it is 100%
If it is "Low", the FA mode is selected, so set the flag MOF to 1°.

No. In step 5, the output terminal (01) of the microcomputer (IC2) is "High", that is, the input terminal (ill) is "
Determine whether it is “High”.Here,
If the input terminal (ill) is 'LOW', NO, return to step 2 and repeat the above operation. (ill) is 'HIGH'.
gh”, the output terminal (0
16) is set to "High" (No, 6), the transistor (BT2) is made conductive via the inverter (IN5), and power supply from the power supply line (Vl) is started. next,
Set fixed data C1 corresponding to the longest integration time in the integral time clock register JTR of C0D (to LM) (N0
．． 7). Next, output 1 pulse of "High" from the output terminal (010) (No, 8), and control circuit (00)
After starting the integration operation of the CCD (FlM) and enabling interrupts (No. 9), No. Move on to step 10.

NO, in steps 10 to 13, the motor (MO
) is rotating or not is sequentially determined.

That is, whether or not the first focus detection operation has been performed is determined by the flag FPF (No. 10), and the drive position of the focusing lens (i) is at the closest or infinite end position. The end flag ENF determines whether or not it has been reached (No,
11), the focus flag IFF determines whether or not the drive position is within the focus zone (No, 12), and the switch (F
Which mote is selected by AS) is sequentially determined by the flag MOF (NO, 13).

Here, if the first focus detection operation has been performed, if the lens has reached the end position, if it is in the focus zone, or if FA mode is selected, the rotation of Peter (LO) Since it is stopped, it moves to the steps after N0.14. In addition, if the second and subsequent focus detection operations have been missed, and the nonce has reached the end position and the focus zone, and AF mode 1 is selected,
Since the motor (MO) is rotating, No. Move to step 35 and subsequent steps 4. The flag FPF is 1° during the first focus detection operation, and 0 during the second and subsequent operations, and the end flag ENF is the focus detection function (F1). When the driving position reaches the closest position or the infinite position and no pulse is output from the encoder (EEC) even if the motor (MO) is rotated further than that, it becomes "1", and the focus flag IFF becomes "1". '1' when the lens is in the focus zone, 'o' when it is out of focus
become.

In the steps after No. 14, "1" is first subtracted from the contents of the integral time measuring register JTR (No. 14).
), it is determined whether a hollow BRW is output from this register (No, 15).

Here, if the borrow BRW is no longer displayed, the low brightness flag LLF is set to 0" (No, 18), and the microcomputer (1
02) to the input terminal (i+4) to avoid operating the microcomputer (Nci) is determined (No, 19), and (111) or “High” signal is input.
If it is "LOW", then NO, go back to step 14 and repeat this operation.If it is "LOW", NO, go to steps 25 and onwards to return to the initial state, and then go to step No. 2. Go back to the step and reconnect the input terminal (ill)
Wait until the signal becomes “High”. On the other hand, if Polo BRW or °C Tako left is determined at the step of N0.15, it means that the longest integration time has elapsed, and the output terminal (011)
output a pulse (No. 16) to forcefully stop the integration operation of the CCD (FLM) and set the low brightness flag LLF.
1", from the control circuit (00th) to the interrupt terminal (1t)
Wait for the interrupt signal to be output.

No. In the steps after 35, first, data C2 for a certain period of time is set in the old register TWR (No, 35).
, subtract n (for example, 3) from the contents of register jTR to determine whether there is a borrow BRW (No. 3).
7). Here, if borrow BFW is output from register ITI, it means that the longest integration time has elapsed, so move to step NO, 16 and C0D(F
Lv) to avoid forcibly stopping the integration operation of low luminance flux L.
Set LF to 1° and send the interrupt end from the C control circuit (COI).
It has an interrupt signal input to it.

Also, if Borrow BRA appears and disappears, low brightness Nolag LL
Set F to "0" and subtract "1' from register TWR to determine whether borrow BRW is issued (NO, 4)
0). At this time, if a borrow BRV occurs, check whether the input terminal (ill) is “High” or not.
o, the determination is made in step 41. (ili) or “High
If it becomes "h", No, return to step 36, and "L".
If the result is "No", the process moves to step 25. Note that if C1/n>C2 is determined, and until a borrow BRW is issued after determining "NO" at step 37, the result is "No" and the process moves to step 25.
Multiple borrows occur in the 40-step decision.

No. When a borrow BRW occurs at step 40, the data E which is the number of pulses from the encoder (E\C) is sent to Karan.
Set the CD in register ECD1 (No, 42), and compare this setting data with the contents of register ECR2 (
No. 43). Incidentally, the register ECR2 is set with the previously fetched data of Callan 1. Here, if the contents of registers ECR1 and ECR2 do not match,
Since the lens is moving, register ECF
The contents of 1 are set in the register ECR2 (No, 44) and the process returns to step N0.35.

No. If the contents of registers ECRI and ECR2 match in step 43, the pulse count data from the encoder (EyC) that was captured last time has not changed, that is, the lens has not moved and the closest The position or the infinite position has been reached. Therefore, in this case, interrupts are disabled (No. 45) and the output terminal (0
11) outputs the pulse λ (No. 46) to the CCD (FL
4) is forcibly stopped, and the output terminal (012
) and (013) are both set to 'LOW' (No. 47) to stop the rotation of the C motor (VO), and determine whether the low contrast flat LCF is 1° or not (No. 48).
). Incidentally, this flag lCF is set to 1 degree when the subject has a low contrast and the teff A-scrap suspension Δl used in the tube based on the output of the CCD (FLN) is unreliable. Here, when the flag LCF is °O°, the termination flag ENF is set to "1" (No. 49), and the N
o. The process moves to step 270. No. In step 270, it is determined whether the input clapper (i+4) remains at "High", and if the AF mode is still selected at (it4) or 'High', the process moves to step 2. .On the other hand, if (it4) is 'Low' and it is not possible to switch to FA mode 1, set the flag FPF to '1' and set the terminals (O42) and (013) to 'Low'.
to stop the motor (MO) and flag LCF, LC
After setting F1 and LCF3 to "O", return to step N0.2.

To summarize the above operation, in response to a focus detection operation command from the microcomputer (MC2), the CCD starts integration, enables interrupts, and starts counting the longest integration time. If the motor (MO) is not rotating at this time,
An interrupt signal or input is input while the longest integration time is 1, and if the interrupt signal is not input even after the longest integration time has elapsed, the CCD integration is forcibly stopped, and the interrupt signal is input. wait for it to happen. On the other hand, if the motor (M0) is rotating when the CCD integration operation is started, an interrupt signal is input while periodically determining whether the lens has reached the final position while counting the integration time. In the Samurai, if no interrupt signal is input even after the longest integration time has elapsed, and if the lens has not reached the end, the CCD integration is forcibly stopped and an interrupt signal is generated. Also, if the lens has reached the end, interrupts are not possible and the integration is forcibly stopped.
Stop the rotation of the rotor (M○), integrate the CCD again, calculate Δl and determine whether C is in focus, as described later, and from then on, the microcomputer (MC2) to the microcomputer (MC1) Even if a “High” signal is input to the input terminal (i11) of the microcomputer (Mci), the microcomputer (Mci) does not perform focus detection or focus adjustment, and when this signal becomes “Low”, the photometry switch (YES) is turned on again. is opened and the input terminal (i
ll) becomes “High”, NO. The operation starts from step 2.

Now, if it is determined in step No. 48 that the flag LCF is "1", then the flag LCF1 is set to "1".
It is determined whether it is true or not (No, 51). Here, LCF
is “O”, set LCFI to “1” (No.52
), No. At step 60, the focusing direction flag FDF is set to "
1". By the way, the flag LcFl is a flag for scanning the lens position where the contrast is higher than a predetermined value in order to determine whether or not it is so-called stupid blur. When loading (front bin)
is a flag that becomes "1" and becomes "O" when the lens is advanced (rear bin) when Δl<O. At this time, if the DF is "i", it is set to 0°, and if it is "o", it is set to 1, and it is determined whether the input terminal (i12) is "High" or not (No. 63, 64) . That is, the rotational direction of the motor for feeding out the lens is determined, and if No. 63 is (i12) or "High," then the rotation direction of the motor for feeding out the lens is required to be clockwise.
Move to step 66 and set the terminal (O12) to “High.”
”, (013) is set to “Low”. (i12) is set to 'L
ow”, use a heater (MO) to extend the lens.
must be rotated counterclockwise, so No.
Move to step 65 and set τ terminal (012) to 'LOW'
, (O13) is set to "High". Also, No. 64
If step (i12) or "High" is selected, the motor (MO) must be rotated counterclockwise to retract the lens, so it is No. Proceed to step 65.

(i12) or 'low', the motor (MO) must be rotated clockwise to retract the lens.Go to step No.66.Next, in step No.67, connect the terminal (014). Set to "High" and rotate the 7-tar (VO) at high speed C, then move to step No. 270.

No. If it is determined that the flag LCF is 1°1° in step 51, it means that the closest or infinite end position has been reached while the contrast remains low, and the printer (M
O) is stopped (No.53), and (iii) is °Lov
“Become Samurai (No, 55), Flag LCF, LC
F1. Set LCF3 to °0'' and return to No. 25 slab.

Now, a series of operations in the case of low contrast will be explained.

First, if the contrast is low in AF mode, output "101" to the output port (○P'0) to display a warning (N0.105), and then check whether the flag LCF is "1". Discern.

(No. 107). Here, the flag LCF is not "1" and the contrast is low for the first time.
Set flags LCF and LCF3 to “1” (No, 108
, 109), No. At step 110, the first operation (F
PF=1) or not. Flag FPF or “O”
In the case of , the previous operation was not low contrast,
Since there is a possibility that this measurement was an error, No.
Moving to step 280, No. After steps 270 and 271, NO. Return to step 2 and perform the measurement again. At this time, the motor is rotating toward the previously calculated value.

Note that when the end flag ENF is 1°, it is NO, and after the step 110, it is NO. When it moves to step 280, the rotation of the motor (MO) has stopped, so the input terminal (
ill) becomes “Low” (No.281
), set the flags LCF and LCF3 to “0” (No, 2
82) to No. In steps 25 and onwards, the microcontroller (MC)
1) Set the initial value for stopping the operation.

Also, the flag FIF is “1” at step No. 110.
When it is determined that this is the first operation, the flag FPF is set.
, set LCF3 to “O” (No. 111, 113),
No. At step 205, it is determined whether the tefocus amount ΔL is positive or negative. If ΔL>0 and the front bin, set the fract FDF to °1
°, if ΔL<0 and the latter bin, set the flag FDF to “0” (
No. 0.206, 209), the aforementioned No. Similar to steps 63 to 66, set the motor (MO) to prevent the lens from extending.
) The motor (MO) is rotated counterclockwise or clockwise depending on the rotation direction of the motor (MO). Next, in step No, 212, it is determined whether the integration time (contents of the register ITR) is shorter than the constant value C7, and if the integration time is less than the constant value ((ITR)≧C7), the terminal (014 ) 'Hi
gh” to drive the motor (MO) at high speed (No.
213), and when the integration time is greater than a certain value, the terminal (014
) is set to “Low” to drive the motor (MO) at low speed (No, 214), and after passing No. 270, the motor (MO) is driven at low speed.
, go back to step 2 and start measurement again. In this way, the originally determined direction of herence is moved until the subsequent measured value becomes a value that is not a low contrast value.

When the lens reaches one end position with low contrast, the flag LCF1 is set to "1" at step No. 52.
Then reverse the direction of movement and move the lens while repeating measurements. If the other end position is reached while the contrast remains low, it means that the lens has been scanned from one end to the other, so the process moves to step 55 (NO) and stops the operation. Note that if it is determined that the measured value is not low contrast during this operation, No. 1 will be displayed.
Shifting to step 01, a lens control operation based on defocus adjustment, which will be described later, is performed. If the contrast suddenly becomes low, ignore the first measurement value as described above and measure again. If the contrast is also low this time, the flag LCF3 will be "1'" (No.
, 112), set the LCF3 to °O'' and proceed to step 205, determine the moving direction of the lens based on the next measured value, and search for a position where the contrast is greater than a certain value.

If the contrast is low in FA mode (M0F=1), move from step No. 106 to step No. 115, set the Furano LCF to °1", flag LCF1,
NO. LCF3 is set to 'o', flag FPF is set to 1°, termination flag ENF is set to 0°, and output terminals (012) and (013) are set to 'low'. The process moves to step 258, performs the operations described later, and performs measurement again.

Microcomputer (MC1) or No. No. from steps 9 to 13. 14, 15, 18.19 loops or No. 3
5-40.42-44 loop or No. 36-41
While executing the loop, the integration operation of the CCD (FL1) is completed and the control circuit (CO
When a 'High' pulse is input from T), the encoder (MC1) jumps to step No. 70 and starts interrupt operation.First, the ECD or register that counts the pulses from the encoder (ElC) ECR3 is set (No. 70), and direct C3 corresponding to the number of light receiving sections of the CCD, that is, the number of data input to the input port (IPO) of the controller (MC1), is set in the register DNR (No. 71) and step No. 72, the input terminal (i
Wait for a “High” pulse to be input to (lo).

After the A/D conversion of the CCD output is completed, the input terminal (ilo)
becomes “High”, one CCD output data CD input to the input port (IPO) is transferred to the register M (DN
R) (No, 73), then register DN
"1" is subtracted from the contents of R (No. 74), and the number continues until borrow BRW is output from this register DNR.
Steps 72-75 are repeated. In this way,
CCD output data CD is sequentially set in register M (DNR).

When all the CCD output data CD have been taken in, a return address is set, a return operation is performed to that address, and the process moves to the main flow after step NO, 77.

At step No. 77, it is determined whether the flag LLF is "1". Here, if LLF is “1”, CCD
The largest data MACD among the data CDs from is searched (No, 78). When the highest hit of this data MACD is not "1", all CCD output data ΔlC
D is doubled (No, 80), and when it is "1", doubling results in overflow data, so the process directly proceeds to step 81 (No, 80). On the other hand, flag L
If LF is "0", NO, immediately proceed to step 81.

In steps No. 81 and 90, the integer part and decimal part of the shift amounts of the two images in a plane equivalent to the film plane are calculated. Incidentally, a specific example of the operation around the shift in these steps is disclosed in, for example, U.S. Pat. No. 43330.
07 or Japanese Patent Application Laid-Open No. 57-45510, the details will be omitted here. In steps No. 82 to 85, it is determined whether or not the motor (MO) is rotating, similar to the steps No. 10 to 13 described above.

Now, while the motor (M0) is rotating, the count data ECD of the pulseless number from the encoder (ENC) is taken into the register ECR1 (NO, 86), and this data and No. Imported register E
The contents of CR2 are compared.

If (ECRi) = (ECR2), the lens has reached the end, so the operation moves from step No. 47 mentioned above, and if (ECR1)≠(ECR2), the lens has not reached the end. Reset the contents of EcRl to ECR2 and press N
o. Proceed to step 89. On the other hand, the motor (MO
) has not rotated, the process immediately moves to step 89 (No).

In step No. 89, the input terminal (i11) is “Hi”.
gh”, and if it is “LOW”, No. 2
The focus detection operation after 5 seconds is stopped and initial settings are made, and when it is "High", the process moves to step No. 90 to calculate the decimal part of the shift amount, and the decimal part of the shift amount is calculated. The defocus amount ΔL is calculated based on the shift amount calculated in step 90 (No. 91).

In step No. 92, it is determined whether the mode is AF mode using the flag MOF, and if it is AF mode, the process moves to step No. 93, and if it is FA mode, the process moves to step No. 100. In the case of AF mode, first the microcomputer (MC2)
The change coefficient KD latched in the latch circuit (LA) is fetched from the input port (IPl) (No.
), it is determined whether k3 of this data is "0" and k2 is "1" (No, 94). Here, k3=0 and k
In case 2-1, as mentioned above, the interchangeable lens cannot operate in AF mode, so the mode flag MOf is set to “
1" (FA mode) and move on to step 96. On the other hand, if k3=1 or k2=O, it means that an interchangeable lens capable of AF mode is attached.
No. Moving on to the 100th step. Furthermore, No. 96
In the step, it is determined whether k1=Q, and kl=1
If so, No, move to step 7 of 100.

If it is kl-0, as described above, it means that a lens that cannot be switched to macro mode is attached unless the lens is extended to the closest position, and that the user is trying to switch to macro mode. This is No. Move to step 220, set the output terminal (O14) to "High", and turn on the motor (MO
) is rotated at high speed, then the input terminal (il2) becomes “H”.
If it is (il2) or "High", the lens is extended by rotating clockwise, so the output terminal (01
2) is set to “High”, and if it is set to “Low”, it is fed out by rotating counterclockwise, so (O13) is set to “
After setting the pulse count data ECD from the encoder to the register ECR2 (No.
, 224).

Next, set the fixed time data C8 in the register TWR (No, 225), and from the contents of this register TWR
'' is repeated to determine whether or not a borrow BRW has been generated. When a borrow LRW is generated after a certain period of time has elapsed, the pulse count data ECD from the encoder is taken into the register ECRi (No, 228).Next, Determine whether the contents of registers ECR1 and FCP2 match (No. 22d9, if (ECR1)≠(ECR2), set the contents of ECR1 to ECR2 (No. 230)
), and repeat steps 225-230. On the other hand, when (ECR1) = (ECR2), the lens has reached the closest position, and the output terminals (012) and (013
) to “LOW” to stop the motor (MO) (N
0, 231) and set the flag FIF to “1” (NO, 2
32), No, return to step 2. Note that from now on, the FA mode operation will be performed.

In step No. 100, it is determined whether the data from the CCD is contrast data or not. A specific example of this step will be described later based on FIG. 17.

Here, if the contrast is 1, the above-mentioned No. The process moves to steps 105 and subsequent steps. On the other hand, if the contrast is not low, No. Flag LCF is “1” at step 101
Determine whether or not. Here, if IcF is "1", the measurement value up to the previous time is low conherst, so the flag FP is
F is '1', flag LCF, LCF1.LCF3 is '0'
", move to step 290 and refer to the mode flag MOF. If MOF = 0, that is, AF mode, output terminals (012) (Oi3) are set to "LOW" and the motor (MO) is stopped. , return to step No. 2 and perform the measurement again.
If it is mode, No. Moving to step 240, the FA mode operation described later in step 1 is performed.

No. In step 101, if flag LCF=l and the previous measured value is not low contrast, No. At step 104, the mode flag MOF is referred to, and if MOF is "1", that is, FA mode, No. To step 240, MOF is “0”
In other words, in the AF mode, the process moves to step N0.125.

No. In steps 125 to 130, an operation is performed to determine when the defocus amount ΔL is within the focus zone ZNi. First, the lens has not reached the final position and the flag ENF is "0". And (No. 12
5) Once the in-focus zone is reached, the in-focus flag lFF
is "1" (No, 126), the current measurement value jΔL1 and ZN1 are set as No. Compare in step 127. Here, if |ΔL|<ZN1, display the focus (No, 128), wait for the input terminal (III) to become 'Low' (No, 129), and move to step 25. and stop operation.

On the other hand, if |ΔL|≧ZN1, set the flag FPF to “1”
, the flag IFF is set to "0" and the process moves to step 135, where a lens control operation is performed using the defocus amount based on the current measurement value.

Mako, the lens has reached the end and the flag ENF is "1"
In the case of No. At step 127 |ΔL|<ZN
If it is 1, display the focus, (No, 128), |Δ
If L|≧ZN1, the previous TeFocus direction remains displayed, and No. 129 slump, and as described above, when (ili) becomes "LOW", the operation is stopped. Here, if |ΔL|≧ZN1, the previous defocus direction remains displayed and No. The process moves to step 129, or in this case, the lens is brought into focus even at the end position, and the motor (MO) is subsequently controlled, but since it is useless, the operation of the microcomputer (MC1) is forcibly stopped.

If it is determined in steps NO, 125, and 126 that the lens has not reached the end position or the in-focus zone,
First, in step No. 131, it is determined whether the first bus flag FPF is 1°.

Here, when the flag FPF is 0°, the above-mentioned NO, 8
Similar to steps 6 to 88, an operation to determine whether the lens has reached the end is performed (Nos. 132 to 134).
After that, No. 135, and FPF
However, when it is 1°, it remains No. The process moves to step 135. No, in step 135, the microcomputer (MC2
) is determined, and the focus detection command signal from the input terminal (il
When l) is "Low", No, the process returns to step 25 and the operation is stopped; when it is "High", No, the process moves to step 136.

In the step No. 136, the calculated defocus amount ΔL is multiplied by the read conversion coefficient KD to exclude the drive amount data N of the non-drive mechanism (LDR), and again in the step No. 137. Determine whether the flag FPF is 1°. Here, if the flag FPF is "1", it is first determined whether N is positive or negative (No, 140), and if it is positive, the focusing direction flag FDF is set to "1", and if it is negative, it is set to "0". Later, the absolute directivity of the drive amount N is stored in register E as Nm.
CR4 is set (NO, 144), and the flag FPF is
0'' and the process moves to step No. 166.

On the other hand, No. Flak FPL is “o” in 137 Sudetsubu
First, the contents of the register ECR4, which stores the data of the previous drive amount, are transferred to the register ECR5 (No, 150), and the encoder at this point (
The pulse count data ECD from ENC) is taken into register EcB4 (No, 151). That is, E
CR5 contains count data T at the end of CCD integration.
c1, but ECR4 has count data r at this point.
This means that c2 is set. Next, the amount of movement of the lens during the period required for CCD integration τ = Tco - Tc
1, the amount of lens movement to=Tcl-Tc2 during the period required to calculate N is calculated. Here, C
Assuming that N is exclusive at the middle position of the CD integration period, at this point the lens is at the time t/2 when N is obtained.
It has moved +to.

In addition, data N''m = N'm - τ - to which the moving force τ + to of the lens is corrected from N'm obtained in the previous flow
is calculated. Note that this data N''m is always positive.

No, in steps 155 to 157, the defocus amount N
It is determined whether the focusing direction has been reversed or old based on the sign and the flag FDP. First, in step No. 155,
It is determined whether the defocus amount N calculated this time is positive, and if N is positive, it is determined whether the flag FDF=0 (No. 156). At this time, if FDF=0, it means that the direction has reversed, and the process moves to step N0.158.
If FDP=1, it means that the rotation has not been reversed, so if it is No, the process moves to step 159.

On the other hand, if N is negative, it is determined whether FDF=1 (
No, 157), if FDF=1, it is reversed, so No
, the process moves to step 158, and if FDP=0, it means that the rotation has not been reversed, so if no, the process moves to step 159. When the direction is not reversed, that is, at step No. 159, the motor is rotating and the focus position is approaching, so the value of N obtained in the middle of the integration period is returned to |N ｜
-τ/2-to=N' is calculated to correct the amount of movement due to the rotation of the motor, and then it is determined whether this N' is negative (No, 160). Here, if N'<0, it means that the in-focus position has been passed, so set |N'|=N' and move on to step 164, and if N'>0, N0
．． 161 snob takes the average (N''m+N')/2=Na of the data N''m and N' obtained up to the previous time (No, 161), and divides this data Na by Nm (N
o, 162), No. Move to i66 step.

When the direction is reversed, that is, at step No. 158, the current defocus direction is τ/2−to far from the in-focus position from the time when the current data was obtained, so |N|+τ A correction calculation of /2+to=N' is performed, and the process moves to step 164 (No). No. 164
In the step of , the average of N″m and N′ (N″m−N′)
/2=Na is extracted, and then it is determined whether this average value Na is negative (No, 165).

Here, if Na>0, the above-mentioned No. Move to step 162, and if Na<0, terminals (O42) and (013) are set to '
“Low” to stop the motor rotation (N0, 17
4) Multiply the focusing zone data ZN1 by the conversion coefficient KD to calculate the focusing zone motor rotation amount data Ni (No. 175). Next, it is determined whether Na | < Ni (No. 176), and if |Na |
Set F to "1" and go through 270 steps to get No.
Move on to step 2. On the other hand, if |Na|>Ni, it means that the focus zone has been passed, and the flag FPF is set to "1".
Similarly, after going through steps 270 and No. Move to step 2 and repeat the measurement operation.

In step N0.166, the near focus zone data NZ is multiplied by KD to calculate data corresponding to the amount of lens drive from the near focus zone to the in-focus position.

Next, No. At step 167, the near focus zone value ZN1
By performing the operation V of Ni=ZN1XKO from
NO, 167), Nm and Nn are compared (No, 1
68). Here, if Nm≧Nn, that is, outside the near focusing zone, No. Move to step 181 and connect the terminal (O14)
is set to "High", the motor (MO) is rotated at high speed, and the counter ECC for counting pulses from the encoder (ENC) is set to Nm-Nn (
No. 182), No. 185.

On the other hand, if it is determined that Nm<Nn, that is, within the near-focus zone, it is determined in step 169 whether Nm<Ni. Here, if Nm≧Ni, it means that even if it is within the near focus zone, it is not within the focus range, and the output terminal (014) is set to 'low' and the motor (MO)
The rotational speed is set to a low speed (No. 183), Nm is set to the counter FCC (No. 184), and the process moves to step No. 185.

In addition, in the case of a lens whose KD changes depending on the shooting distance, lens control is performed only by the signal in the defocus direction when it is not in the near focus zone, but when calculating the defocus amount, it is necessary to start from N0.150. Since the moving part of the lens is corrected, the data for this correction is used for No.
At step 182, Nm-Nn is set in the counter ECC. Also, if Nm<Ni, the output terminal (012)
, (013) is set to 'low' to avoid stopping the motor (MO) (No. 171), the focus flag IFF is set to 1° (No. 172), and counter interrupt is disabled (N.
0.173), No. Return to step 270 and perform confirmation measurement again.

Now, if No, step 185, the flag FDF is “1”.
Here, if FDF is "1", it is the front bin, so it outputs "100" to the output port (OPO) and lights up the light emitting diode (LD0) to display the front bin (No. 189). , If it is "o", it is the rear bin, so it outputs '001' to the output capo-1 (OPO) and lights up the light emitting diode (LD2) to display the rear bin (No,
189).

Next, the motor (MO) is activated by the contents of this flag FDP and the rotation direction signal of the interchangeable lens to the input terminal (112).
Rotate clockwise or counterclockwise (No, 188
．． 191), No, the process moves to step 192, and it is determined whether the input terminal (i13) is "High". Here, if an interchangeable lens whose conversion coefficient changes depending on the shooting distance is attached and (ii3) is "High", then
No. At step 193, it is determined whether Sm<Nn. At this time, if it is outside the near focus zone and Nm≧Nn, the above-mentioned No. Immediately from step 182, No.
As shown in step 185, the motor (MO) is activated only by the direction signal, regardless of the calculated Nm.
Determine the direction of rotation and rotate. Next, the integral aid is C7
Determine whether it is longer than a certain time value corresponding to (N0
．． 194), if it is long, there is a possibility that the lens will go too far at the focusing position, so set the terminal (014) to "low" and drive the motor (MO) at low speed (No, 195)
, making counter interrupts impossible (No. 196), No.
．． No. 270 steps in light. Return to step 2.

On the other hand, when it is determined in step No. 193 that Nm<Nn and that the near focusing zone is entered,
As with a normal interchangeable lens, enable counter interrupt (No. 197) and return to step No. 270. Further, if the input terminal (113) is "Low", counter interrupt is enabled and if No, the process returns to step 270.

Now, while the shutter (MO) is rotating, the encoder (ENC)
) When the contents of the counter CC, which counts pulses from the counter CC, reaches 0°, a counter interrupt occurs, and it is determined at the step of N0.200 whether Nm<Nn. Here,
If Nm<Nn, motor (MO) with near focus saw
In other words, the focus zone has been reached, and the output terminals (012) and (013) are set to "Low" to stop the rotation of the motor (MO) (No, 203).
The focus flag (IFF) is set to "1" and if No, the process returns to step 270. On the other hand, if Nm≧,Nn, it means that the near focusing zone has been reached, and the output end F (014) is
w” and set the motor to low speed (No. 201), then
is set in the counter ECC (No. 202), and then returns to the address where the interrupt occurred.

Next, No. 104 or No, if it is determined in step 290 that the flag MOF is "1", then NO.
The FA mode operation is performed in steps 240 and subsequent steps. First, in step No. 240, the flag FPF is
It is determined whether the angle is 1° or not. Here, if FPF is "1", it will operate in FA mode for the first time.
In case you switch from AF mode i, set the termination flag E.
Set NF to "0", focus flag IFF to "0", and set focus zone data ZN2 to focus learn determination register IZR.
Set up. Note that this data ZN2 has a larger value than the data ZN1 in the AF mode. This is AF
In the case of the FA mode, the lens position can be adjusted with high precision by motor drive, but in the case of FA mode, the downward movement C lens position is adjusted, so it is very difficult to adjust the lens position as accurately as with the motor drive. . Next, No. 245
In step No.246, the first pass flag FPF is set to 0.Meanwhile, the first pass flag FPF is set to 0.
If F is “0”, immediately No. The process moves to step 246.

No. At step 246, the focus flag IFF is set to "1".
” or not. At this point, the flag IFF is “1”.
”, then the previous calculated value is in the focus zone, so the average value of the previous calculated value A1n-1 and the current calculated value Δl, that is, Aln-(A!+Δln-1)/2 The calculation failed (No, 247), and Zw (>ZN2) is set as the focus zone data in register IZR (N
o. 248) After that, No. Move to step 250. There are variations in the measured values each time, and once it enters the in-focus zone, it expands within the in-focus zone, increasing the probability that it will be determined to be in focus, and changing the lens position or the in-focus zone. This is to prevent the display from flickering when near the boundary. On the other hand, No. If the focus flag IFF is "0" in step 246, the current measured value ΔL is set to ΔLn (No. 249), and the current measurement value ΔL is set to ΔLn (No. 249). Move to step 250.

No. At the step of 250, |ΔLn|<(IZR),
That is, it is determined whether the calculated value is within the in-focus zone.

If it is determined that the focus is within the in-focus zone, the focus flag IFF is set to "1" (no. 251), and a light emitting diode (LDI) displays the focus (no. 25).
2), No, move to step 258. On the other hand, if it is determined that it is outside the focus zone, it is determined whether ΔLn>0 (No. 253), and if ΔLn>0, the front bin is displayed by the light emitting diode (LD0), and if ΔLn<0 (LD2) Post-bin display is performed. Next, the focus flag lFF is set to "0", data ZN2 is set in IZR, and No. The process moves to step 258. No. In step 258, it is determined whether the input terminal (i14) is "High", and if it is "High", the AF mode is switched.
○゛ and No. In step 2, press F again with “LOW”
If it stays in A mode, it will remain No. Return to step 2 and perform the next measurement.

In steps No. 25 to 33, the focus detection operation in the AF and FA modes is stopped and the initial state is set. First, it was determined that interrupts were not possible (No. 25)
), the CCD biting operation is forcibly stopped by outputting a pulse to the terminal (011) (NO.26), and the terminal (012)
, (013) is set to "Low", the motor (N0) is stopped (No, 27), and the output capo [(010) is set to °○O.
Light emitting diode (LDO), (ID1), (
LD2) is turned off (No. 28), the terminal (Oi6) is set to 'low', and the power supply from the power line (VF) is stopped (No. 32). Also, Fushiku ENF, IFF,
The LCF3 is set to 0° or the flag FPF is set to "1" (Nc, 29-31, 33). After this initial setting is made, No. Return to step 2.

Next, as a modification of the above embodiment, when the subject area to be focused in the focus adjustment operation in the AF mode reaches the in-focus zone, whether another subject area is within the depth of focus or not. An example of an eggplant in which fortune-telling can be confirmed will be explained based on FIGS. 11, 12, and 13. Here, FIG. 11 is a main circuit diagram showing only the parts different from FIG. 2,
FIG. 12 is a main part flowchart X-1 showing only the parts different from FIG. 3, and FIG. 13 is a main part flowchart I-1 showing only the parts different from FIGS. 8 to 10. That is, No.
．． When it is determined that the object has reached the in-focus zone at step No. 127, and a slip sheet is displayed (No. 128),
Set the flag 1FF1 to “1” (No, 300), and set the output terminal (O30) of the microcomputer (MC1) in Fig. 11 to “High”.
h” (No. 301).

This output terminal (030) is connected to the input terminal (15) of the microcomputer (MC2), and the microcomputer (MC2) indicates that the lens has reached the in-focus position by the "High" level of the input terminal (i5). Cover the discrimination.

Next, the microcomputer (1C1) moves to step No. 270, does not switch to FA mode, and remains in the sagging state.
o. Return to Step 7 of 2 and perform measurement again. In this case, since the flag IFF is "1", No. It comes to step 91. No
．． 91 steps and no. Between step 92 and step 92, there is a step (N
o. 305) is provided, and if the flag lFF1 is "0", then No. Go to step 92; if "1", go to step 306;

No. 306 reads data from the input port (IP2). Here, as shown in Figure 12,
Between step 30 and step 31 in FIG. 3, exposure control aperture value Av is output from the I/O boat (#80), and this aperture value is output from the output terminal (an+2) of the decoder (DEC). ) is latched by the latch circuit (LAI). Therefore, the exposure control aperture (direct data) is input to the input capo-1 (IP2).

The read data AV is FNo. (No.
307), No. At step 308, ΔD=δ×FN0
．． A performance will be held. Here, δ is a value corresponding to the diameter of the allowable blur, and LD is a value corresponding to the depth of focus.Next, the defocus amount |ΔL obtained in step 7 of No. 91 in this flow | and ΔD are No. It is compared in step 309, and after the focus status display below, No. 27 is selected.
Move to step 0.

Here, if |ΔL|<ΔD, the part of the object measured at that time is within the depth of focus, and a signal of "010" is output to the output boat (OP5), and the light emission shown in FIG. The autofocus (LD4) is turned on to display focus. On the other hand, if |ΔLl>LD, depending on whether Δl is positive or negative, '100' is output to (OP5) and the light emitting diode A-1 (LD3) is lit to display the previous bin. , or 'OO1' is output and the light emitting diode (LD5) is turned on to display the rear bin.

By performing this operation, after the lens reaches the in-focus position in AF mode, in order to drive the lens to the in-focus position, the area other than the area where the measurement was performed will be within the depth of focus. The effect is very easy to use, such as being able to check whether the bin is in the bin or whether it is in the front bin or the back bin.

Note that step No. 308 accurately determines the depth of focus, but due to camera shake, etc., it is difficult to accurately place the measurement position on the desired part of the subject, and Δ
The calculated value of l also varies, so you can widen the focusing zone width as in the case of the FA mode mentioned above, widen the focusing zone width once the focusing zone is reached, or change the sieving data several times. The accuracy may be improved by performing average value processing.

Example I: To widen the width of the focusing zone, AD-1×δ×F
It is sufficient to perform the calculation of N0 (1=2 to 3).

In addition, in this modification, No. 1 is used for initial settings when the microcomputer (MC1) stops operating and for initial settings when switched to FA mode. 33 step no. The following steps are inserted between step No. 2 and step No. 273 and step No. 2. That is, the flag IFF1 is set to "o", and (No. 3
20, No. 325), “00” to output capo-1 (OP5)
0” and light emitting diodes (LD3), (LD4)
, (LD5) is turned off (No. 321, No. 326).
), set the output terminal (030) to “LOW” (NO, 3
22, No. 327).

In addition, step 81 in FIG. 12 is a photometry switch (
In order to continue the display operation of the above-mentioned modification for a certain period of time even after the MES) is opened, a step (#81) of determining the state of the input terminal (i5) is performed between the step #38 and the step #39. ) has been inserted. In other words, even if the photometry switch (MES) is opened and it is determined that the mode is AF mode 1, the input terminal (i5) is 'Hich' and the microcomputer (MCI) is within the depth of focus described above. If any operation is being performed, the output terminal (ol)
Do not set it to 'low', leave it at 'High'.

Figure 14 shows the control circuit (Go) of the CCD (FLM) in Figure 2.
FIG. 1 is a circuit diagram showing a specific example of 1). Counter (CO24
) is the clock pulse (CO22) from the counter (CO22).
24) is counted, and the output signal (p0) of this counter (CO24) is counted.
In response to (p4), the decoder (DE20) outputs a "High" signal to the output terminals (T0) to (T9).

The output of this counter (CO24) and the decoder (DE2)
0) output and flip-flip tip (FF22), (F
Table 7 shows the relationship between F24) (FF2O) and (FF28) Q output.

As is clear from Table 7, Noritsubu flop (Fl
The Q output (Φ1) of 2G) is “High” while the output of the counter (CO24) is “11101” to “ooioi”.
The Q output (g2) of the Noritsubu flop (FF24) is 'o
"High" between "oioo" and "10111", Q output (ψ3) of flip-flop (FF22) is 'io1i
It becomes "High" between "o" and "1iiiio". This output No. 8 (Φ1), (Φ2), (ψ3) is the power supply line (V
While the analog signals are being fed from F) to the CCD (FL4), analog signals are constantly being transferred within the transfer group 1. Note that this operation also discharges the accumulated charge remaining in the transfer port 17-.

Power-on reset circuit (PO
Reset signal (PO2) 7 from R2), Noritsubu flop (FF2o) to (1F28), (FF32), D Noritsubu flop (DF20), (DF22), (DF2
4), Power printer (CO20).

(CO22) and (CO24) are reset. Furthermore, the flip knob (FF30) is set and the Q output becomes "High". This output signal (ψR) makes the approx switch (A32) conductive, and the constant voltage source (Vrl
) is connected to the CCD (FI) via the signal line (ANB).
M), and the potential of the charge storage section of the CCD (FLM) is set to this potential.

When a "High" pulse is output from the output terminal (010) of the microcomputer (MC1) to start the fractional operation, the Nori-V knob (FF30) is reset via the one-shot circuit (OS18) and the terminal (010) is output. $R) or “L
ow". As a result, the CCD (FLM) starts accumulating charges according to the amount of light received by each light receiving section. Also, the analog switch (As
1) becomes conductive and the CCD monitor output is connected to the terminal (ANB
) to the (-) terminal of the inverter (AC+). According to the accumulation of charge, the CCD monitor output from the terminal (ANs) decreases from the potential v11, and the constant voltage source (V
12), the output of the comparator (AC1) is inverted to "High". Due to dirt, the CCD (FL)
It is detected whether the storage of M) has been completed. As a result of this inversion, a "High" pulse is output from the one-shock 1 circuit (OS10), and the flip-flop (FI20) is reset via the OR circuit (0R20). “H” of this Q output
The “high” signal is taken into the D flip knob (DF20) by the rising edge of the terminal (Φ1), and the “high” signal of the Q output
"High" releases the glue set state of the force sensor (CC20), and the AND circuit (A60), (A\64)
, (8N6i), and (ANB8) are enabled.

After the terminal (φ1) rises to “High”, the terminal (φ1) rises to “High”.
When To) becomes “High”, the flip-flop (FF
28) is set by "High" at the terminal (To), and reset to "1" by "High" at the terminal (T1).

This Q output is passed through an AND circuit (A\68) to a terminal (#
T) to “High” pulse to CCD (F1M)
The accumulated charge is transferred to the transfer group I in No. 8. Roughly speaking, these (9 signals) are sent to the interrupt terminal (it) of the microcomputer (Ic1), and the microcomputer (MCI) performs an operation of taking in the output data of the previous CCD (FLM).

When this terminal (ΦF) falls to 'low', the flip-flop (FF) is passed through the one-shot circuit (OS1G).
32) is set to cell 1, and the gate of the AND circuit (ANB8) is closed by the "Low" of its Q output, and after that, the "High" signal from the Q output of the flip-flop (FF28) is not output. Furthermore, one-shot circuit (○516
), a flip-flop (
FF30) is set, and the terminal (φR) is set to “High” again.
h”.

CCD (
The accumulated charge from FLv) is sequentially output from the terminal (AC terminal), and this charge is output while (Φ2) is "High". Therefore, D flip-flop (DF
When the Q output of 20) becomes “High”, (φ2) becomes “
“High” of the terminal (T4) during the period when it is “High”
gh” from the sample hold signal (ψS) or the AND circuit (A1GG), or the “High” signal from the terminal (T5).
h'', a signal (ψA) for starting AD conversion is output from the AND circuit (A164).

In addition, the accumulated N charge that is first sent from the terminal (AO-cho) of the CCD (FTI) is used for offset adjustment, so that only the charge corresponding to the leakage of the light receiving part is accumulated. Therefore, it is almost equal to the output potential of (Vrl). At this time, the D flip-flop (DF24
) is "High", the sample full hold signal (φS) is given to the ripple hold circuit (SHl) via the AND circuit (A\70), and the offset adjustment potential is applied to the CCD ( FLL) to terminal (AD
(lower) and stored in the sample hold circuit (SH1). The Q output of the D flip-flop (DF24) is “
The subsequent 4J block hold signal (
ΦS) is given to the sample hole 1 circuit (SH2) via the AN 1 circuit (AN72), and the potential corresponding to the subsequent received light m is sequentially stored in the sample hold circuit (SH2).

Q output of D flip-flop (DF20) is “High”
”, the signal of (Φ3) is sent to the AND circuit (AN60)
is applied to one input terminal of the AND circuit (Ah62). Since the Q output of the D flip-flop (DF22) becomes "High" at the first fall of this (q3), the pulse signal of (q3) from the second time onwards is passed through the AND circuit (A to 62). This signal is applied to the input terminal (ilo) of the microcomputer (vC1) and serves as a signal that instructs the microcomputer (MC1) to import data into the input port (IPO). Here, the Q output of the D flip 70 tube (DF20) becomes “High” and the first AND circuit (AN60)
The reason for not outputting the pulse (Q3) from the AND circuit (AN62) is that the data from the first CCD (FLM) is data for off-hit adjustment, as described above. Also, the signal of (ψ3) is the counter (
The clock input terminal of CO20) is also provided, and the counter (CO20) is connected to the D control flop (D120).
The reset state is released by the "High" level of the Q output of (Q3), and the rising edge of the pulses (Q3) and others are current. When this counter (CO20) receives pulses from (Φ3) as many as the number of light receiving sections of the CCD (FLM), one end of the carry signal j (cY) becomes "High".

From the second time onwards, the sample and hold circuit (SH2)
The output data of the CCD (FlM) is subjected to rimple hole 1 based on the signal (φS), and the resistors (R+) and (R2):
The difference between the output of the sample and hold circuit (81II) and the output of (SH2) is outputted to the subtraction circuit consisting of the amplifier (OAI) and given to the j block input terminal of the A-D converter (AD). . The A-D converter (AD) starts operating with the signal (ΦA), and converts this input gutter to A- based on the clock pulse (DPI) from the counter (CO22).
D conversion zuru. Here, the output of the constant voltage source (Vrl) is set to Vr
1. If the voltage drop due to leakage is vd, and the voltage drop due to the amount of received light is Vl, the output of the Zambre Hall l circuit (SH1) is Vrl--vd, and the sample halt circuit (s+2)
The output is Vr1-Vj-Vd. Therefore, the output of the subtraction circuit is a signal component of only the received light amount vl. Note that the AD converter (AD) is preferably of a type that performs AD conversion at high speed, such as a successive approximation type.

After completing the A-D conversion of all data from the CCD (FL4), the terminal (CY) of the counter (CO20)
becomes 'Hight'.As a result, flip-flops 7 (FF20), (FF32), D flip-flops (DF20), (DF22), (DF24) are activated via the one-shot 1 circuit (C814) and the OR circuit (0122). When the counter (CO20) is reset and the Q output of the D flip-flop (DF20) becomes 'low', the counter (CO20) enters the reset state and returns to the state before the 'High' pulse is input from the terminal (010). do.

Also, when the timer of the microcomputer (MCI) determines that the integration time has reached a certain value or more and inputs a 'High' pulse to the terminal (O41), the fall of this pulse causes a 'non-shot circuit'. O812), a flip-flop (1F20) via the A circuit (0R20)
) or set. Therefore, from now on, 'Nhaleta (AC)
The same operation as when the output of 1) is inverted to "High" is performed, and the output data of CCD (1) or A-D is
The converted data is sequentially output to the input capo-1 (]FO) of the microcomputer (MCI).

Figure 15 is a modified example in which a part of the circuit diagram in Figure 14 is changed.If the output arc from the CCD is small, the arc can be doubled after importing the data into the microcomputer (LC1). This operation used to be performed by software 1 in the microcomputer (ICI) (Io, steps 78 to 82 in Figure 3), but it is now performed by hardware before performing eight-way conversion. .

A constant current source (CIS) is connected between the terminal ($R) and “High”’.
), the potential V(1) between the resistor (RIO) and ([13) is applied to the CCD (FLM), and during "Low", the CCD
(“LM” monitor output is a comparator (AC10)
It is given to the (-) input terminal of ~(ACl2). Then, as the integration progresses and the potential of the monitor output or Vr2 is reached,
The output of the comparator (AC12) becomes "High", and a "High" pulse is output from the one-piece circuit (OS10), and this pulse causes the A circuit (OR20) to output a "High" pulse.
), the flip-flop (F20) is reset and thereafter performs the same operation as described above.

Roughly speaking, this pulse is passed through one flip-flop (1"32
) to (DF38). At this time, since the output of the comparator (AC+2) is "High", the Q output of the D flip-flop (1F1a) is "High".
gh” and press the Atalog switch (AS48), (A8
38) becomes conductive. Here resistance (R30) ~ (i40)
The value of is R30=R40=R38=R4B=R36/1,
5=R48/1, 5=R34/2=R44/2=R32
/2.5=R42/2.5=, and due to the conduction of the anoroku switch (A838) and (A548), R30
-R40=R38=R4B, so operational amplifier (OA
40) outputs the signal of V1.

On the other hand, when the contrast of the CCD output is low and the output of the dual amplifier circuit (AC12) is not reversed within the longest integration time, the signal from the output terminal = (oll) of the icon (MCI) ) outputs a “High” pulse through the A circuit (0120), and the monitor output at that time is Vr2 to Vr3, Vr3.
Exclusive OR circuits ([04) and (E
O2), Q of D flip-flop I-tube (DF36), (DF34), (DF32) via inverter (IN52)
One of the outputs becomes "High", and each of the 1-naroke switches (A836), (A846), (AS34)
), (AS44), (AS32), and (AS42) are electrically connected.

Therefore, integration is forcibly stopped, and signals of 1.5Vl, 2Vl, and 2.5V1 are output from the operational amplifier (OAlo) according to the monitor output at that time.

Figure 16 shows the microcontroller (MC1) shown in Figures 8 to 10.
), and shows a part of the flowchart when out-of-focus continues to be detected again in the measurement results after in-focus has been detected. 130 steps and No.
A step regarding flag lFF2 is inserted between step 138. That is, the focus adjustment of the lens is performed up to the in-focus zone, and if the end flag ENF is "0" (No, 130), it is determined in step 354 whether it is the flag IFF2 or "1". Here, if flag IFF2 is "0", set this flag IFF2 to "
1", move to step 270, and perform measurement again for confirmation. Meanwhile, flag IFF2 or °1".
If so, check the measurement results for confirmation by pressing twice and checking the out-of-focus (
|ΔL|≧ZN1), and in this case,
Set the knock IFF, 1FF2 to "o", set the flag FPF to "1", move to step No. 135, and perform the focus adjustment operation again. Note that steps No. 33 and No. 2 A slab (No. 34, No. 241) for resetting the flag lFF2 and returning to the initial state is provided between the step No. 240 and the step No. 241, respectively.

FIG. 17 is a specific flowchart of step No. 100 in FIG. 8, that is, the step of determining whether the contrast is low 1 or not. First, set the contents of register C to “0” (N
o, 370), register I is set to “1’” (No, 371)
Zuru. Next, the output ai of the 1st and 1-1st light receiving element
, ai+1 The value obtained by adding the contents of register C to the absolute value of the difference |ai-aj+i| is set in 1 no register C (No,
372), and 1 is added to this register i (No, 37
3), the contents of this I and n (n is the national number of light-receiving cords) are compared (NO, 374). Here, i<n-
If i, then No. Returning to step 374, the absolute values of the differences are successively integrated until i=n-1 and No. Move to step 375. That is, at the time of moving to step N0.375, the contents of register C are |a1-a2|
−|a2-a3|+|a3-a4|+...+, |an2-
an-i|+|an-1-an|, which, as is well known, has seven values indicating the contrast of the subject.

No. In step 375, it is determined whether this value is larger than a constant value CD, and if (C)>CD, the contrast is sufficient, so No. Move to step 101, and if (C)≦CD, the contrast is low, so No. 1
Move to step 05.

Note that when the focus adjustment state is detected using two series of light receiving element outputs, it is sufficient to use only one series of outputs for contrast determination. In addition, if the data associated with "contrast of the subject" is found in the process of calculating the defocus amount and defocus direction, this data is memorized and 3 is used to determine whether the contrast is below a certain level. It is also possible to perform the determination of the net truss 1 by performing the following.

Figures 18-41 to 23 show the zoom lens mechanism in the above-described embodiment in which macro shadowing is possible by rotating the zoom ring to the short focal length side from the shortest focal length position. FIG. The optical system of this zoom lens is composed of four lens groups 1, If, III, and IV, as shown in the relative positional relationship diagram C in FIG.
Continuous focus adjustment from infinity to the nearest point is achieved by moving lens group I. By moving lens groups II and IV, the focal length can be changed, and by moving lens groups II and IV, focus adjustment during macro photography can be performed. Note that lens group III is fixed. Also, Fig. 19, Fig. 20,
FIG. 21 is a W-plane view of the main part of the lens barrel when set to long focal length, short focal length, and macro photography, respectively.

As shown in Figure 5, the exchange mount (1) has a fixed cylinder (2), (
3), (4), and (5) are attached in one direction. The variable magnification ring (6) is rotatably mounted on the fixed barrel (5), and the manual focusing ring (7) is attached to the mounting bracket on the lens group I holding frame (8) and the relay link (9). It is being The relay ring (10) is rotatably installed on the fixed part (5), and the axial groove (11) on the ring and the guide pin (12) on the relay tube (9) allow the relay tube (9) to be rotated. The distance scale reading window (13) can be recognized from the outside by the shooting distance scale set on the outer periphery of the relay ring (10). I need Natsuko to be able to do it.

The sum cam ring (14) is rotatable only in the outer circumferential direction of the fixed barrel (4), and the cam groove (15) (+6) shown in the diagram shown in FIG. , Relay groove (+7) (18) and cam groove (19) (2) for macro alignment
0) is provided. Since lens group III is a fixed lens, a moving cam groove is not necessary.

Further, since lens group IV is integrally coupled with lens group II as will be described later, a dedicated cam groove is not required and is covered by the cam grooves (16), (18), and (20) for lens group II. The front moving frame (21) is in engagement with the lens group l holding frame (8) by a helicoid screw (22) as a movable screw, and its outer periphery is movable to the inner diameter of the fixed barrel (4). They are mated. A guide pin (23) fixed to the front moving frame (21) passes through an axial groove (25) of the fixed cylinder (4) and fits into the cam groove (15). Note that the guide bin (23) has a shape having a nesting part and a small diameter part as shown in the figure. The rear moving frame (26) for holding lens group III is a three-finger-like arm (not shown) extending toward the right in the drawing, and this part is connected to the fixed barrel (4).
It is movably fitted to the inner diameter of the Guide bin (27)
is fixed to the rear moving frame (26), and the fixed cylinder (4)
It passes through the axial groove (28) and fits into the cam groove (1G). The lens liver III holding frame (two) contains a part of a known aperture device, and is integrated with the fixed cylinder (4) by a small part (not shown), and is attached to the rear moving frame (26). It has three relief portions that allow the arm portion to move to the right. The lens anus IV holding frame (30) is integrally attached to the rear end of the arm of the rear moving frame (26).

The link between the zoom cam ring (14) and the variable magnification link (6) is such that the pin (31) fixed to the zoom cam cluster (14) is connected to the fixed cylinder (
This is done by passing through the relief elongated hole (32) of 5) and fitting it into the axial groove (33) of the variable power link (6). , a female part (3J), a circumferential groove (3G), a small gear (
37). Small teeth (31) are raw silk rings (1
It meshes with the inner m@heavy (38) installed on the inside of 0). The driven shaft (34) has a bearing plate (39) and a fixed cylinder (2).
are rotatably held by bearing holes provided in each.

The slider (41) has an axial notch (
43), the switching cam (44) of the balk (41) and variable ring (6) engages with the circumferential groove (36) of the driven shaft (34) (Fig. 23). ) is provided with a guide bin (42) that fits into the hole. Fixed tube (5)
There is a brush for reading information on the fixed cylinder (5) side and a yaw pattern on the variable magnification ring (C) side between the variable magnification ring (6) and the variable magnification ring (6). is formed.

The mold section on the camera body side is shown on the right side of FIG. 19, and its configuration will be briefly explained below. (50) is an exchange mount 1 on the camera body side which receives the exchange mount (1) on the lens side. A drive shaft (51) driven by a motor (MO) and for driving a driven shaft on the lens side has a male part (52) that engages with a female part (35) of a dog clutch on the driven wheel side, and a circumferential groove (51). ), vinyl A gear (53) is integrated, replacement mount 1 (50), fixing member (55)
The lens is supported by a bearing hole, and is urged toward the lens by a spring (56) provided on a fixing member (55). The lock release m (!7) is integrated with a lens lock pin (not shown), and a part of the linking plate (58) integrated with this button fits into the circumferential groove (54) of the drive shaft (51). ing.

Next, the function of this zoom cam ring will be explained. When performing a magnification change operation as shown in FIGS. 19 and 20, when the magnification change ring (6) is rotated, the rotation is in the axial direction M (33).
, is transmitted to the zoom cam ring (14) by the bin (31). When the zoom cam ring (14) is rotated, the variable power cam groove (1
5), (1B) and the axial grooves (25), (28) cause the guide bins (23), (27) to move in the optical axis direction,
As a result, the front moving frame (21) and the rear moving frame (2G) move together with the guide bin, so that the lens groups 1, II, and IV held by them also move together. That is, the focal length is changed by moving between TELE and WIDE while avoiding satisfying predetermined relative positions as shown in FIG.

When automatic focusing by the AF motor is performed, the rotation of the motor (MO), which is drive-controlled by the aforementioned motor drive circuit (MDR), is transmitted to the drive shaft (51) via a drive transmission system (not shown), and When the shaft (51) rotates, the driven shaft (34) is rotated by the dog clutches (52) and (35), and the relay ring (10) is rotated by the small gear (37) and internal gear (38). Axial groove (11), bottle (
12) to the relay tube (9) and the lens group I holding frame (8).
), the lens group l is rotated and moved in the optical axis direction by the action of the helicoid screw (22), and a focusing action is performed. The decoy distance at this time is confirmed through the reading window (13) and the shooting distance scale on the relay link (10).

When focusing is performed in FA mode instead of automatic focusing, the holding frame for lens group I (8) is rotated by manually rotating the manual focusing ring (7), and the edge of the holding frame (8) is rotated. The lens group 1 is rotated and moved in the optical axis direction by the action of the id screw (22), and a focusing action is performed. In this case, the rotation of the manual focusing ring (7) causes the driven shaft (34) to rotate in favor of the relay rings (9) and (10), and the sweater (MO) on the camera body side is also driven accordingly. Either the driven rotation is blocked by a slip mechanism inserted into the drive transmission system of the camera body, and the C[-tar(
NO) is no longer transmitted and manual focusing is not inhibited.

FIG. 18 shows a close-range operation for close-range photography, also called close-up photography or macro photography.

This will be explained below based on FIG. 21, FIG. 22, and FIG. 23. In the variable power range, the variable 8 link (6) rotates between a long focus end and a short focus end, which are regulated by the F1 lever (not shown). When you operate the restriction release button (not shown) on the variable magnification link (6), the stop function at the short focal length end is canceled, so rotate the variable magnification link (6) further to bring it to the close focus area. be able to. By this rotation, the kite bins (23), (27) fit into the relay grooves (17), (18) in close proximity to the unnecessary cam grooves (19), (20).

In this state, by rotating the variable magnification ring (6), you can perform a close focusing operation. Of course, it is also possible to focus by rotating the variable magnification link (6) to a desired position and then moving the entire camera back and forth with respect to the subject.

By the way, in the case of such macro photography, it is preferable not to perform automatic focusing as described above.

As mentioned above, when the variable magnification ring (6) is rotated to obtain a close-up shooting area, the switching cam (44) installed on the variable magnification ring (6) also rotates, and the kite bin (42) is The cam (
It fits into the groove of the MACRO part shown in FIG. 23 of 44). That is, the optical axis direction height difference bin (42) of the cam (44) is moved to the left in the drawing,
Slider (40), Hawk (41), Circumferential groove (3G)
The driven shaft (34) is also moved to the left in the drawing, and the dog clutches (35) and (52) are disengaged from each other. As a result, the user may accidentally switch
Even if the AF mode is selected by operating the
The rotation of 51) is not transmitted to the drive @(34).

Incidentally, in order to detect the displacement of the driven shaft (34), the motor drive circuit etc. may be deactivated, and instead of moving the driven shaft (34) with the switching cam (44), the fixed member M The shaft may be moved by an externally operated collar.

Further, in the above-described embodiment, the driving force is disconnected from the system by engaging and disengaging the engagement latch between the drive shaft and the driven shaft, but for example, the relay ring ( 10
) can also be moved to engage and disengage the internal gear (38) into the small gear (37).

In that case, the relay link (10) is movable in the axial direction, a circumferential groove (36) is provided on the link (10), and the groove (36)
A sliter (40) may be interposed between the cam (44) and the cam (44).

In addition, in the third embodiment described above, the mechanism will be explained using a so-called zoom lens as an example of a variable power lens.
The present invention is applied to the so-called harifuka-karnosis, in which the focal length changes due to the variable B operation, and the focal point position changes, and this change in focal position is automatically corrected by the white point focusing operation. Kadeki 6.

As a modification of the above zoom lens, if zeta-chromatography is to be performed on the long focal point side, the cam groove for close focusing or the variable area cam may be extended from the long focal point side. At this time, lens groups 1 and II are often placed close to each other at long focal lengths.In such an optical system, lens group II is moved toward lens group 1 for close focusing. , lens group II may collide with lens group I. In order to avoid this, it may be possible to widen the distance between lens groups 1 and 11, but this is not desirable as it causes problems such as a reduction in the zoom ratio or an increase in the size of the lens system, and it is not necessary for close focusing. 3 by moving lens group I forward.
(In this case, it is practical to create the initial space for close focusing operation of lens group II and make it approximately the same size. In this case,
By extending the lens group I forward, the secondary effect of increasing the maximum copying magnification is also achieved.

Figure 24 is a diagram showing the groove bottom of a zoom lens using the J-type zoom lens. The basic structure is the same as that of the previous embodiment, and the same parts or similar parts are denoted by the same symbols, and the explanation thereof will be omitted.

Normal range shooting distance N scale (70)l, medium phase link (10)
It is provided on the outer periphery of the cylinder (5), and can be read at 1 through the reading window (1ζ) of the fixed cylinder (5), and the shadow distance can be read by the index (71) of the cylinder (+)j.

For example, next to the minimum photographing distance of 1.5 m, there is an X7-mark (72) indicating that this is the designated switching position for close focusing. In (73), the relay link (10) is connected to the bar end surface (79).
It is a notch provided in the. The restriction release button (74) is
It is installed in the link (6) so that it can move in the direction of the optical axis (to the right in the drawing), and at the position shown in the figure, the slider for the variable 8 range acts on the CIj, and the length is stuck when moving in the direction of the arrow. The focus side stopper is released and the variable 8 ring (a) can be rotated to the close focus area. Focal length scale (75
) is set on the variable magnification ring (6), and the focal length can be read by an index (7G) on the circumference 1 (3). (77) indicates the close focus area.

The switch (78) is installed on the variable magnification ring (6) and is biased in the opposite direction to the arrow mark on the drawing by a spring (not shown), and the restriction release button (74) is applied to the biasing force of the spring. It is closed when the current system is canceled and moved to purchase. This switch (78) corresponds to the switch f (MCS) in FIG.

The key (81) is allowed to move only in the optical axis direction, has a roller (82) installed at its left end, and has its right end in contact with the first end surface (83) of the variable magnification ring (13), as shown in the figure. It bounces and is always biased in the same direction.

The variable magnification ring (G) has a slope (81) at a position corresponding to the switching point between the long focus end and the close focus area on the extension of the first part (83), and has a slope (81) corresponding to the switching point between the long focus end and the close focus area The second end face (8i
) are doing 4. (86) is an axial elongated hole that allows the axial movement of the restriction release button (74).

The manual focusing and automatic focusing operations in the normal focusing range, the variable magnification operation in the variable power range C, and the close focusing operation are the same as in the previous embodiment, and when switching to the close focusing range, Explain the action to IZ. In this embodiment, it is possible to switch to the close focus area with a minimum distance of one shadow by using only the stepped grooves or by using the VM Dodenkurisha.

When mechanically switching from normal state to close focusing, n
When the release button (74) is moved in the direction of the arrow against the biasing force of a spring (not shown), the long focal point side stopper (not shown) will no longer work, and the object will be moved beyond the long focal point end (100 mm in the diagram). It becomes possible to rotate the variable magnification link (6) υ to the focal area. However, the slope (8) of the variable magnification link (6)
4) and the right end of the key (81) are interfering with each other, making it impossible to turn the variable magnification link (6) to the close focus lens even though the long focus side lever viewing function is released. I don't do it. In other words, collision with lens groups I and II is prevented. At this point, rotate the manual focusing link (7) in the direction of closest distance, turn the relay ring (9) to T, and rotate the relay ring (10) as well. When the notch (73) matches the index (71), the notch (73) comes to face the roller (82) at the left end of the key. At this time, when the variable magnification link (6) is rotated in the direction of close focus, the effect of the slope (84) χ$-(81
), the loan (82) moves to the left against a rightward urging force (not shown), and the roller (82) fits into the notch (73).

When the variable magnification link (3) enters the close focus area, the right end of the key (81) comes into contact with the second end surface (85), and the fitting of the roller (82) into the notch (73) is completed, and the variable magnification link (3) is in close focus. The ring (6) can be rotated freely to focus at close range. In addition, in a normal focusing mechanism, the shortest focusing distance is fixed and lens group I is extended to the frontmost position, so even if lens group II moves due to close focusing, lens groups I and II
There will be no collision, and the maximum decoy magnification can be obtained.

Incidentally, this step-by-step action can be applied to optical systems that are deformed from second to second.

In the case of the above-mentioned step-by-step switching, although it is possible to avoid collisions between lens groups due to incorrect operation, it is always necessary to manually operate the focusing link to switch to the close focus area. The conversion operation is somewhat inconvenient.

The case where this operation is performed electrically will be explained below.

First, by moving the restriction release button (74) to the right, the long focus side restriction is completely released and the switch (78) is closed. When the switch (78), that is, the switch (IC8) in FIG. 5 is closed, the information is transferred to the microcomputer (MC2).
The rotation command is transmitted to the microcomputer (IC1) via the microcomputer (IC1), and a rotation command is issued to the motor (10) to move the lens group 1 for the normal focus area in the direction of N photographing distance. As a result, the pinion (37) rotates, the internal gear (38) rotates, and the lens group I moves to the shortest photographing distance position, and the notch (73) faces the roller (82). Since it is rotated to the close focus position, the close focus rotation of the variable 8 link (6) may be prevented. After entering the close range, press the restriction release button (
When you remove your finger from the nucleating agent (7l), the nucleating agent (
74) is moved in the opposite direction to the arrow and the switch (78) is moved.
Also listen.

In other words, in order to mechanically switch to the close focusing range, it was necessary to manually rotate the manual focusing link (7) to the shortest focusing distance position.
Since the burden is avoided, one step of changing the usage name can be omitted.

In this example, the starting position of the relationship between the key (81) and the slope (84) is the same as the long focus end position, but the position of the slope (84) has been moved downward in the figure. It may also be provided in a suspended position. In this case, when the restriction release button (74) is operated, the relationship starting position between the key (81) and the slope (84) is slightly rotated beyond the long focal length end position, and the variable power link (6 ) is the signal for the close focus area, so based on this signal the motor (
MO), and the switch (78) can be omitted. However, in this case, the drive motor (lO) does not rotate at the same time as the restriction release button (74) is operated as in the previous embodiment, but begins to rotate only when the long focus end is slightly exceeded. Therefore, the timing of switching to close focusing is somewhat delayed. Furthermore, by displacement in the optical axis direction, movement of the magnification control ring to the closest focus area is allowed only at the shortest focusing distance position, but movement is permitted by displacement in the radial direction. It is also possible to use a similar mechanism. In addition, press the release button (
71), but it is of course possible to replace this with a click device and use other known methods.

Next, the small part of the slip mechanism (S1P) will be explained based on FIG. 25 and FIG. 2G. In the figure, the optical system of the interchangeable lens is schematically shown at C, and the drive mechanism of the camera body (
LDR) and upper coater (NC) are not shown in the drawings. In addition, mechanisms that have the same configuration as those shown in the above-mentioned drawings are designated by the same symbols, and their explanations will be omitted. Figure 25 shows the L part (52) of the drive shaft (51) of the camera body and the driven shaft (34) of the lens by the dog clutch.
) is shown engaged with the female part (35) of the second part.
Figure 6 shows the state in which the mesh is disengaged.

The right end of the drive shaft (151) has circumferential grooves (91) and (92) for engaging one end of the blank connection lever (93) and one end of the cam connection lever (97), respectively.
) or elaborate. The movable piece (94) of the plunger (95) is powered through a transistor (BT50) and controlled according to the output of an AND circuit (AN81).
) is mounted on the thin end of the connecting lever (93). Here, the AND circuit (80) includes an inverter (IN80)
The output terminal (0h) + signal of the microcomputer (MO2) is turned on via the inverter (IN1), and the photometry switch (ν
The opening/closing signal of the switch (ES) and the opening/closing signal of the switch (FAS) are inputted via the inverter (IN6).

Therefore, the output of the ant circuit (AN80) is only when a focusing command is output from the microcomputer (MC2), the seven metering switches (4ES) are opened, and the AF mode is selected by the switch (FAS). "High", power is supplied to the plunger (90), and the movable part (90) is
4) moves to the left in the figure. In addition, the cam temporary (97) is attached to the notch (97b) by the click spring (98).
(97c) selectively positioned to engage the
The position shown in FIG. 25 or 26 is determined by rotating an operating member (not shown) for setting whether or not to perform the focusing operation automatically. Here, Fig. 25 shows a state in which automatic focusing is set, and Fig. 26 shows a state in which manual focus is set.
. Also, the other end (96a) of the cam connection lever (96) is positioned so as to face within the rotation locus of the nob portion (97a) of the cam plate (97).
) or Q, and in the state shown in Figure 25, both stones are in a distant positional relationship. Now, if autofocus is selected by operation part A (not shown) and power is not supplied to plunge t-(95), as shown in FIG.
A dog clutch is formed by this action, and the drive shaft (51) of the camera body and the driven shaft (34) of the lens are connected.

On the other hand, when manual focusing is selected by an operation member (not shown), as shown in FIG. 26, the cam part (97a) of force x1 (97) is (96
1) to the left in the figure, the drive shaft (51) springs (
5G), moves to the right in the figure C, and the dog clutch is disengaged. In addition, even if automatic focusing is selected, if the microcomputer (Mc2) does not output a focusing operation command signal, the output of the AND circuit (AN80) becomes ``Hi''.
gl'', power is supplied to the C plunger (9ri), and its movable piece (94) moves to the left, so the drive shaft (51) moves to the right in the figure, as described above. The dog clutch is disengaged.In this way, by disengaging the dog clutch h, the transmission of the motor (MO) drive torque from the camera body side to the lens is cut off, and the lens is accidentally driven. This inconvenience is prevented.

In the method of electrically disengaging a dog clutch like the one used in Doho, it is necessary to continue supplying center to the plunger during that period.
As a power-saving measure, an AND circuit (A＼80 ) The above-mentioned electromagnet may be operated for a certain period of time in response to the rise of the output signal C to release the above-mentioned lock.

Effect J As described above, the present invention provides an automatic camera that drives the focusing lens of the photographing lens toward the planned focal position based on a signal indicating the deviation of the imaging position of the object to be focused from the planned focal position. In the focusing camera system, a focusing width signal having a predetermined value that is different from each other is alternatively selected when the A-res lens is driven automatically and when it is driven manually, and the selected predetermined value is The focus detection device is configured so that the τ in-focus state is detected based on the focus width signal of This eliminates the need for the conventional troublesome focus adjustment operation of switching and pulling the focus width during the focusing operation, making focus adjustment easy regardless of automatic drive or manual drive. Moreover, each has the effect of being able to detect whether or not it is in focus with a predetermined focus detection accuracy.

According to the third aspect of the present invention, manual focusing is performed in consideration of psychological factors during manual focusing caused by response delay due to inertia and instability of focusing state display when manually driving the focusing lens. By widening the focus width during focus adjustment by drive to the focus width in automatic drive, it is possible to smoothly perform focus adjustment by manual drive.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an outline of the camera system according to the present invention, Fig. 2 is a circuit diagram without showing its circuit configuration, and Fig. 3 is a flowchart showing the operation of the microcomputer (MC2) shown in Fig. 2. F, Figure 4 is a circuit diagram showing the specific circuit configuration of the serial data input section (SDI) of the microcomputer (IC2), Figure 5
The figure is a circuit diagram showing the circuit configuration of the converter (CV) and interchangeable lens (LE) attached to the camera body, and Figure 6 shows the specific light emitting diode 1 drive circuit (FAD) controlled by the microcomputer (IC1). A circuit diagram showing the circuit configuration, Fig. 7 is a graph showing the relationship between the focal length and the conversion coefficient of a variable magnification lens having an optical system in which the conversion coefficient changes depending on the focal length, and Figs. The microcontroller (MC) shown in the figure
11 is a circuit diagram showing the main circuit configuration of the first modified example of the camera system shown in FIG. Figure 14 shows the main parts of the flow of the microcontroller (NC2) and (MCI).
The first circuit diagram shows the specific circuit configuration of the control circuit (COT) controlled by the MC1).
FIG. 17 is a flowchart showing the main part of another modification of the flow of FIG.
The figure is a diagram showing an example of the relative positional relationship of each lens group of the variable 8 lens according to the present invention, and Figures 19 to 21 show the settings for long focal length, short focal length, and macro photography, respectively, for this variable 8 lens. A half-mounted sectional view of the lens barrel when
FIG. 22 is a perspective view showing the main mechanism of this variable power lens, and FIG. 23 is a developed view showing the main mechanism of this variable power lens.
Figure 24 shows the main mechanism of a modified example when setting macro images using this variable magnification lens, and Figures 25 and 26 show the main mechanism of the camera body side. FIG. BD: Camera body, [E: Photographic lens, FL: Focusing lens, lEC: Lens circuit, tOC: Reading circuit,
FAS, NC3, 78: Switch means, 120: Discrimination means, 116: Drive mode signal output means, 117, 118
: Focusing width signal output means, 119: Focusing width signal switching means,
113: Focus determination means. Application filed Minolta Camera Co., Ltd. V Figure 17 No, '? 2 No, /ρ/No, 105 Fig. 1F Fig. 1q Scene-uL = 1H 亙■ Fig. 2θ Fig. 1H Summer TV Z/Fig. Tx'm, rv Fig. 22 Fig. 73 Fig. 24 Fig. 25 Figure 26 f3T6θ

Claims (5)

[Claims] (1) In an automatic focusing camera system in which the focusing lens of the imager is driven toward the expected focal position by falsifying a signal indicating the amount of deviation of the imaging position of the subject to be focused from the expected focal position. , a first focusing width signal output means for outputting a focusing width signal having a first predetermined width, and a second focusing width signal outputting means for outputting a focusing width signal having a second predetermined width different from the first focusing width.
a focusing width signal output means for outputting a focusing width signal; a drive mode signal output means for outputting a drive mode signal for instructing whether to drive the A-scrap lens (of the copying system) automatically or manually; and the second focusing width signal output means, and when the automatic drive mode signal is output from the drive mode signal output means, the first
a focusing width signal switching means for outputting a second focusing width signal 8 and a second focusing width signal 8 when a manual drive mode signal is being output; and a focus determining means for determining whether the imaging position of the object to be focused is within a range that can be considered to be in focus, based on the focus width signal from the means. Detection device. (2) The second focusing width No. 18 output means outputs a focusing width signal having a width wider than the first predetermined width from the first focusing width signal outputting means. The focus detection device described in . (3) The drive mode signal output means includes a switch means that selectively switches between automatically driving the focusing lens of the photographing lens, manual driving force, and a downward movement operation, and a switch means that responds to the switching state of the switch means. The focus detection device according to claim 1 or 2, further comprising: a determining means for outputting a drive mode signal that is determined by the focus detection means. (4) The drive mode signal output means includes a signal reading means for reading signals from the photographing lens, and determines whether or not proper focus adjustment is possible during automatic drive based on the signal read by the signal reading means. The focus detection device according to claim 1 or 2, further comprising a discrimination means for outputting a drive mode signal according to the discrimination result. (5) The drive mode signal output means includes a switch means for selectively switching between automatic and manual driving of the focusing lens of the phase lens, and a signal from the focusing lens. A signal reading means, and determining whether or not proper focus adjustment is possible during automatic drive based on the signal read by the signal reading means, and selecting automatic drive by the switch means and adjusting the focus to the proper focus. A patent claim comprising a determining means that outputs a drive mode i indicating automatic drive only when it is determined that adjustment is possible, and in other cases outputs a drive mode signal without accepting a single drive command. The focus detection device according to the range 1 or 2.