JP2767225B2 - Drive control device for taking lens - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive control device for a photographing lens which is driven by a driving means while outputting a movement detection signal every time a movement is made by a predetermined amount.

[0002]

2. Description of the Related Art Some automatic focus controllers such as a single-lens reflex camera and a video / still camera, and others drive a photographing lens by driving means while outputting a movement detection signal every time a photographing lens is moved by a predetermined amount.

In this type of photographing lens drive control apparatus, when a photographing lens located at a certain position is moved to another position, the number of movement detection signals output as the photographing lens moves by the driving means is counted. Then, control is performed with the photographing lens position when the number of movement detection signals reaches a required value as a target position.

[0004]

In this type of photographing lens drive control device, since the photographing lens is mechanically moved, the actual movement amount of the photographing lens and the number of movement detection signals are determined. Does not completely match, and some error may occur between the ideal photographing lens position recognized by the control device and the actual photographing lens position.

This error is accumulated and increased each time the photographing lens is driven, making it difficult to perform appropriate lens drive control.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a photographing lens drive control device capable of suppressing an error in detecting a photographing lens position and always performing appropriate lens drive control. It is assumed that.

[0007]

According to a first aspect of the present invention, there is provided a photographing lens movable between a first position and a second position, and the photographing lens. Driving means, a detection signal generating means for outputting a movement detection signal each time the photographing lens moves by a predetermined amount, a counting means for counting the number of movement detection signals, and the first or second of the photographing lens. A photographing lens position information detecting means for generating position information of the photographing lens based on reference position information corresponding to one of the positions and a count value of the counting means; and an output interval of the movement detection signal. Lens movement detecting means for detecting a moving state of the photographing lens based on the condition information, and the reference position information and the position information of the photographing lens provided that the lens movement detecting means detects the stop of the photographing lens. Comparing means for comparing, when the difference between said comparison means the position information of the reference position information and the photographing lens of the taking lens is determined to be within a predetermined tolerance,
A drive unit for forcibly changing the position information of the taking lens to the reference position information.

According to a second aspect of the present invention, in the driving control apparatus for the photographing lens, the control means is arranged such that the comparing means determines that a difference between the reference position information of the photographing lens and the photographing lens position information is a predetermined value. A drive control unit for driving the photographing lens in one of the first and second positions when the driving lens is determined to be out of the allowable range. It is.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic explanatory view of a camera provided with a function of keeping the image magnification constant regardless of the movement of a subject.
In FIG. 1, reference numeral 1 denotes a camera main body, 2 denotes a lens mount of the camera main body 1, 3 denotes a photographing lens detachably attached to the lens mount 2, and the photographing lens 3 includes an autofocus mechanism (AF) serving as a focus driving means. Mechanism) and a power zoom mechanism (PZ mechanism) that is a zoom driving means.
Note that, here, AF is an abbreviation for autofocus, and PZ is an abbreviation for power zoom.

A camera control circuit 4 as shown in FIG. 2 is provided in the camera body 1, and a lens control circuit 5 as shown in FIG.

[Camera control circuit 4] This camera control circuit 4
Has a main CPU 6 and a display CPU 7. This main CP
The serial output terminal SO of the display CPU 7 is connected to the serial input terminal SI of U6, and the serial output terminal SI of the display CPU 7 is connected to the serial output terminal SO of the main CPU 6.
CPU 6 clock terminal SCK is connected to display CPU 7 clock terminal S
CK is connected.

The terminal PF of the main CPU 6 has a film
DX circuit 8 for ISO sensitivity detection (for DX code detection) is connected,
The switch PAF A / M for auto / manual switching on the camera body is connected to the terminal P20 of the main CPU6.
The terminal P21 has a switch SWAF for focusing / release priority switching.
S / C is connected.

This DX circuit 8, switch SWAF A / M, switch S
The wiring 9 is connected to the WAF S / C. Between the wiring 9 and the terminals P2 to P9 of the display CPU 7, a photometric switch SWS, a release switch SWR, and a lock switch SWLOC for power ON / OFF are provided.
K, a mode switch SWMODE, a drive switch SWDRIVE, an exposure compensation switch SWXV, an up switch SWUP, and a down switch SWDOWN are provided respectively. These constitute an operation switch group sw-I. By operating this mode switch SWMODE in combination with the switches SWUP and SWDOWN, it becomes possible to select program shooting, auto shooting, manual shooting, and the like. Moreover, by operating the switches SWUP, SWDOWN and the drive switch SWDRIVE in combination, it is possible to switch between continuous shooting (continuous shooting), single shooting (single shooting), self-timer, etc.
The exposure value can be corrected by operating the switches SWUP and SWDOWN in combination with the exposure correction switch SWXV. The photometering switch SWS and the release switch SWR are sequentially operated in this order with two-stage operation buttons.

The main CPU 6 has terminals PA, PB, PC, PD, PE, VDD, Gnd
The terminal PA receives the output of the light receiving element 10 for subject luminance measurement that enters through the photographing lens 3 through the A / D conversion circuit 11, and outputs an exposure correction signal from the terminal PB. It is input to the exposure control circuit 12. In addition, an AF or focusing CCD 14 is connected to the terminal PC via a CCD processing circuit 13 as a defocus amount detecting means. This CCD14
Is used to detect a light beam from a subject by the photographing lens 3 and to detect a focus. AF motor control circuit 15 from terminal PD
The motor control signal is input to the AF motor control circuit 15
Controls the driving of the AF motor 16 in the camera body 1.

The AF motor 16 drives the coupler 18 via a reduction gear 17 for rotation. When a lens-side coupler linked to the focusing lens group is provided at the end of the lens barrel,
When 3 is mounted on the lens mount 2, the coupler 18 engages with this lens side coupler, and the AF motor 16 and the taking lens
The focusing lens group can be driven in focus by the AF motor 16 in conjunction with the third focusing lens group. Since the lens of the present embodiment does not have a lens-side coupler that engages with the coupler 18, the focusing motor group is not driven by the AF motor 16. A pulsar 19 is linked to the reduction gear 17, and the output of the pulsar 19 is
Is input to the terminal PE.

A display LCD 20 is connected to the terminal P _SEG of the display CPU 7. Terminals P10 to P17 of this display CPU 7
Connection terminals Fmax1 to Fmax3, Fmin1, Fmin2 for information transmission, connection terminals A / MT for auto / manual information, common connection terminal C
ont and a power supply connection terminal Vdd-T are connected respectively. ON / O to switch circuit 21 from terminal P18 of display CPU7
A signal for FF is input, and a connection terminal VBATT for power supply is connected to the switch circuit 21.

On the plus side of the battery 22, the Vdd1 of the display CPU 7 and the grounded capacitor 24 are connected via the regulator 23, and the power supply terminal VDD of the main CPU 6 is connected.
Are connected via the DC / DC converter 6 ′,
The switch circuit 21 is connected. And display CPU7
A signal for ON / OFF control is input to the DC / DC converter 6 'from the terminal P1.

On the other hand, the ground terminal Gnd of the main CPU 6, the ground terminal Gnd of the display CPU 7,
Wiring 9 of operation switch group SW-I and connection terminal G for ground
nd-T is connected.

The above connection terminals Fmax1 to Fmax3, Fmin1, Fmin
2, Cont, Vdd-T, VBatt, Gnd-T are arranged on the end face of the lens mount 2 and constitute a connection terminal group TI of the camera body.

In such a configuration, when the main switch, ie, the lock switch SWLOCK is in the OFF state, the display CPU
Since no operation signal is input to the DC / DC converter 6 'from the terminal P1 of 7, the power is not supplied from the battery 22 to the main CPU 6, and the main CPU 6 is in the OFF state.

On the other hand, the terminal VDD1 of the display CPU 7 has a battery
Since the voltage of 22 is applied via the regulator 23, the display CPU 7 operates even when the lock switch SWLOCK is in the OFF state. In this state, the display on the display LCD 20 is turned off.

When the lock switch SWLOCK is turned ON,
The ON signal is input to terminal P4 of the display CPU7,
A display signal is input from the terminal P _SEG to the display CPU 20, and the display LCD 20 lights up. At the same time,
An operation signal is input from the terminal P1 of the CPU to the DC / DC converter 6 ', and the voltage of the battery 22 is applied to the terminal VDD of the main CPU 6 via the DC / DC converter 6'. Thereby, the main CPU 6 operates.

[Power Zoom / Focus Structure of Photographing Lens 3] This photographing lens 3 has a power zoom mechanism for driving the zoom lens groups 25 and 26 shown in FIG. 4, and a focusing lens (not shown). And a focus drive mechanism for driving the lens.

The power zoom mechanism includes a cylindrical fixed frame 27,
A lens frame fitted in the fixed frame 27 so that it can move forward and backward in the axial direction.
28, a first cam barrel 29 rotatably fitted on the outer periphery of the fixed frame 27, and a second cam fitted rotatably and axially movable on the outer periphery of the first cam barrel 29. Cylinder 30 and cam cylinder 30
Has a lens frame 31 fixed thereto. And lens frame 2
Lens groups 25 and 26 are attached to 7,31.

The above-mentioned fixing frame 27 has a guide hole parallel to the axis.
32 is formed, the cam cylinder 29 is formed with slit cams 33 and 34, and the cam cylinder 30 is formed with a slit cam 35 and a guide hole 36 parallel to the axis. Further, the guide roller 37 mounted on the outer periphery of the lens frame 28 is inserted and engaged with the guide hole 32 and the slit cam 33, and the guide roller 37 mounted on the outer periphery of the fixed frame 27 is inserted and engaged with the slit cam 34 and the guide hole 36. The guide roller 39 mounted on the outer periphery of the cam cylinder 29 is inserted and engaged with the slit cam 35.

The above-mentioned focus drive mechanism has an AF motor M1 for driving a focusing lens group (not shown), and the power zoom mechanism has a PZ motor M2 for driving the cam barrel 29. An AE motor M3 controls the aperture of a variable aperture (not shown) provided in the optical path of the photographing lens 3. still,
The motor M1 and the focusing lens group, and the motor M2 and the zooming lens group are linked via a friction clutch.

A zoom position reading means is interposed between the base of the cam barrel 29 and a code plate mounting member (not shown) on the fixed frame 27 side as one of focal length detecting means. The zoom position reading means includes a zoom code plate 40 held by a code plate support member and disposed concentrically around the cam barrel 29, and an inner peripheral surface of the zoom code board 40 attached to the base of the cam barrel 29. It has a brush 41 in contact with it (see FIG. 5). Moreover, a plurality of pattern contacts are provided intermittently in the circumferential direction on the inner peripheral surface of the zoom code plate 40, and the pattern contacts and the brush 41 cooperate to move the zoom position from the zoom code plate 40 to the zoom position. A signal is output.

Similarly, a focusing position reading means, that is, a distance reading means (not shown) is provided on the focusing lens side as one of the focus position detecting means. This distance reading means also has the same structure as the zoom position reading means, and a distance signal is obtained from a distance code plate 42 (see FIGS. 1 and 3) similar to the zoom code plate 40.

[Lens control circuit 5] The connection terminals of the taking lens 3 to the lens mount 2 have connection terminals Fmax1 'to Fmax
3´, Fmin1´, Fmin2´, Cont´, Vdd-T´, VBATT´, Gnd-T´
Is arranged. These connection terminals Fmax1 'to Fmax3', Fmi
n1 ′, Fmin2 ′, Cont ′, Vdd-T ′, VBatt ′, Gnd-T ′ are connected to the connection terminals Fmax1 to Fmax3, Fmin1, Fmin2, when the photographing lens 3 is mounted on the lens mount 2 of the camera body 1. Cont, Vdd-
T, VBatt, and Gnd-T are connected to each other to form a connection terminal group T-II. The connection terminal groups T-II and TI constitute a connection section TC. Data is transmitted between the camera control circuit 4 and the lens control circuit via the connection section TC.

The taking lens 3 has a built-in lens ROM 43 for storing information unique to the lens and a lens CPU 44 used for controlling the lens. The lens-specific information includes, for example, the maximum number of pulses of the focusing lens group and the zooming lens group, whether or not power zooming is possible, whether or not power focusing is possible, whether or not a varifocal lens is used, and a focus correction value by zooming. There is information of. The terminal PL of the lens ROM 43 and the lens CPU 44
The output signal of the zoom code plate 40 is input to the terminal Pk of
A distance signal from the distance code plate 42 is input to a terminal PM of the lens ROM 40.

The motor control signals output from the terminals PH, PI, and PJ of the lens CPU 44 are supplied to an AF motor drive unit (AF motor control circuit) 45, a PZ motor drive unit (PZ motor control circuit) 46, and an AE motor drive unit ( AE motor control circuit) 47. Then, the motor driving units 45, 46, 47 control the driving of the motors M1, M2, M3, respectively. Also, the rotation of the motors M1, M2, M3 is
The AF pulser 48 (one of the focus position detecting means), the PZ pulser 49 (one of the zoom position detecting means, that is, one of the focal length detecting means), and the AE pulser 50
The output signals of 8, 49 and 50 are input to terminals P20 to P22 of the lens CPU 44, respectively.

The connection terminal VBATT 'is connected to the power input units of the motor driving units 45 to 47, and the connection terminal Vdd-T' is connected to the lens CPU 44.
The other end of the resistor 51 and the anode side of the diode 52 are connected to the reset terminal RESET of the lens CPU 44 and the ground line. 53 is connected via a capacitor 54. The connection terminal Gnd-T ', the ground terminal Gnd of the lens ROM 43, and the ground terminal Gnd of the lens CPU 44 are connected to the ground wire 53. The ground wire 53 has a switch SWAF (A / M) for automatic manual switching and a switch SWPZ (A
/ M), constant image magnification mode switch SWPZC to keep the image magnification by the zooming lens constant, and set the zooming lens to the Tele end.
Zoom switch SWPZT that drives to the (telephoto end) side, and zoom switch SW that drives the zooming lens to the Wide end (wide-angle end)
PZW is connected. These switches SWAF (A / M), SWPZ
(A / M), SWPZC, SWPZT, SWPZW are terminals P23 to P27 of lens CPU44
Connected to each other.

The connection terminal Fmax1 'is a reset terminal RESET of the lens ROM 43 and an input terminal (interrupt terminal) In of the lens CPU 44.
t and the emitter of the transistor 55, and the connection terminal F
max2 'is connected to the clock terminal SCK of the lens ROM 43, the clock terminal SCK of the lens CPU 44, and the emitter of the transistor 56, and the connection terminal Fmax3' is a serial output terminal SO of the lens ROM 43, a serial input / output terminal SI / SO of the lens CPU 44, and a transistor. Connected to 57 emitters. The connection terminal Fmin1 ′ is connected to the terminal RDY of the lens CPU 44 and the transistor 58.
The connection terminal Fmin2 'is connected to the ground line 53 via the information setting fuse 59, and the connection terminal
A / MT 'is connected to a ground wire 53 via a switch SW A / M used for switching between automatic or program and manual operated by an aperture ring, and a connection terminal Cont' and a base of transistors 55 to 58 are connected to a lens ROM 43. Power input terminal VCC
It is connected to the. In addition, the collectors of the transistors 55 to 58 are connected to the ground line 53.

[0035] In the [image magnification constant principles] FIG 6, F ₁ is the front side (object side i.e. the object side) focal position of the taking lens 3, F ₂ is rear (image side) of the photographic lens 3 focal position, y ₁ is the size of the taking lens 3 in front of the object (subject), y ₂ is infinity of the light beam by the photographing lens 3 of the image formed on the rear size, a is from the front focal point F ₁ until the object distance, the distance x from the back focal position F ₂ to the image, f is the focal length of the taking lens 3. Then, the position where the image of y ₂ is formed is the focus position.

The equation of image formation in FIG. 6 is as follows: a · x = f ² ... A It is.

Here, the image magnification is set based on the distance a on the object side.
From the equations A and B, the image magnification m is Becomes

Further, based on the image side distance x, the image magnification is A, B
From the formula, the image magnification m is Becomes

If x and f in the equation (2) are x ₀ and f ₀ as shown in FIG. 7A, and the image magnification is m ₀ , the image magnification m ₀ is Becomes Here, by object y ₁ is moved, FIG. 7
When the defocus dx occurs as in (b),
When the distance from the front focal point F ₁ to an object (subject) y ₁ and a _1, A _{formula, a 1 (x 0 + dx} ) = f 0 2 ................................. (4 ), And the distance a ₁ is given by equation (4). Becomes Here, assuming that a new focal length for constant image magnification (m ₀ ; constant) is f, Expression (1) is given by: Becomes By transforming equation (6) with respect to f and substituting equations (3) and (5) into the transformed equation, Becomes When the zoom ratio is obtained from this equation (7), the zoom ratio f
/ f ₀ is Becomes

Therefore, if the zoom ring is driven so as to change by this zoom ratio, the image magnification is constant (m ₀ = f / a ₁ = x ₀ / f ₀ ) as shown in FIG. Become.

By the way, the focal length f of the photographing lens 3 changes three-dimensionally depending on the zoom position and the focus position, as in the focal curved surface 60 shown in FIG. As a result, the distance x ₀ to the image plane described above also varies in three dimensions as the curved surface 61 shown in FIG. 9 by the zoom position and Fuokasu position.

Also, depending on the zoom position of the taking lens 3, K
The value Kval (lens extension amount and focus deviation ratio) changes. Then, the zoom position by the zoom code plate 40 and the Kval
10 changes stepwise as shown by a correction coefficient line 62 shown by a solid line in FIG. 10, and the relationship between the zoom position and the focal length at this time also changes stepwise as shown by a correction coefficient line 63 in FIG. Changes to In FIGS. 10 and 11, the correction coefficient lines 62 and 63 are indicated by broken lines 62.
It is desirable to obtain a smooth change as indicated by 'and 63' in zoom control and focus control. Thus, now the lens ROM43 allowed to pre-stored information for correction shown in Table 1, to as to the f and x ₀ is computed by the lens CPU 44.

Table 1. [Information for correction] 01 Number of first pulses in encoder on zoom code plate P _h 02 First pulse width in encoder on zoom code plate Pw 03 First Kval K _h 04 First Kval correction coefficient Kc 05 First focal length f _h 06 Top focal length correction coefficient fc 07 Focus lens position, focal length primary correction coefficient f _fc1 08 Focus lens position, focal length secondary correction coefficient f _fc2 09 Feed amount x ₀ Calculation coefficients Q, R, S, T 10 Image magnification ratio → zoom drive pulse conversion coefficient A, B, C Here, the leading Kval, that is, the leading K value is the step K _i (I = 0, 1, 2, 3,...) Of the correction coefficient line 62 in FIG. .. N) at one of the left and right ends. That, L (Tel) when directed to the S (wide) side from the side of the right end of the stepped portion K _i, also the Kval the left end of the stepped portion K _i when flowing in opposite therewith.

The correction coefficient Kc of the top Kval is a coefficient for which calculates a value corresponding to the curve 62 'as the slope of the approximately straight line in the stepped portion K _i. Also, the starting focal length f _h is
Like Kval, it means one of the left and right ends of the correction coefficient line f _i (I = 0, 1, 2, 3,... N), and the head focus correction coefficient fc is a value corresponding to the correction curve 63 '. Is a coefficient for approximately calculating the slope of the straight line in the step f _i . The Kval and the focal length obtained in this way are the correction curves 62 in FIGS.
It looks like ´´, 63´. The focusing lens position focal length primary correction coefficient _ffc1 is obtained from the curve 64 determined by the zoom position and the focal length shown in FIG. Further, the focusing lens position and the focal length secondary correction coefficient f _fc2 are obtained by _adding the above-mentioned f _fc1 to the three-dimensional focal surface 60
Is determined.

The focal curved surface 60 is a curved surface determined by the optical design and mechanical design of the photographing lens 3, and is a curved surface that cannot always be expressed in a simple formula accurately and proportionally. The extension amount of the focusing lens defined by this curved surface is almost proportional to the zoom amount of the zooming lens, but is not completely proportional in this case. Therefore, it is necessary to correct the extension amount of the focusing lens.
The correction coefficients for this are Q, R, S, T, and the correction coefficients Q,
R, S, and T vary depending on the optical design and mechanical design of the lens, and the equation (10) using the correction coefficients Q, R, S, and T also varies depending on the optical design and mechanical design of the taking lens. Also,
The number Pz of zooming lens drive pulses used to control the image magnification to be constant is also determined by the optical design and mechanical design of the taking lens. Therefore, the correction coefficients A, B, and C in equation (11) for calculating Pz are values determined by optical design and mechanical design.

Here, assuming that the number of absolute position pulses of the current zoom ring of the photographing lens 3 is Ps and the number of absolute position pulses of the current focusing lens is Pinf, the focal length f and the extension amount x
₀ is f = f _h + fc × (Ps−P _h ) + f _fc1 × Pinf + f _fc2 × (Pinf) ² ……………… (9) x ₀ = Q (Pinf) ³ + R ( Pinf) ² + S (Pinf) + Pinf × T (P _h -Ps)... (10) In this case, Pinf is set to a small value in consideration of an overrun of the feeding amount toward the infinite side. Also,
Assuming that the control image magnification is γ, the number Pz of zoom drive pulses is obtained as Pz = Aγ ³ + Bγ ² + Cγ (11).

The data as shown in Table 1 and the above-mentioned formulas are stored in the lens ROM 43 of the photographing lens 3 in advance.

The main terms used in the flowchart of the control operation of the camera control device having such a configuration will be described.

In this flowchart, AFSTOP indicates a process for stopping the focusing lens group.

FL stands for Far Limit.
Is an abbreviation for a flag for detecting the far end of the focusing lens group. When FL = 1, it means that the control circuit has detected that the focusing lens group is at the far end, and when FL = 0, it indicates that the far end has not been detected.

NL is an abbreviation of Near Limit and indicates a Near end detection flag of the focusing lens group. When NL = 1, the focusing lens group is Ne.
It means that the control circuit has detected that it is at the ar end, and when NL = 0, it indicates that the near end has not been detected.

Pinf is the number of drive pulses from the far end to the near end of the focusing lens group. When Pinf = 0, it means that the focusing lens group is at the far end. This pulse number is detected by the AF pulser 48.

WL is an abbreviation of Wide Limit and indicates a Wide (wide) end detection flag of the zooming lens group. When the flag WL is WL = 1, it means that the control circuit detects that the zooming lens group is at the wide end (Wide end), and when WL = 0, the Wide end is not detected. Means that.

TL is an abbreviation of Tele Limit, and is a Tele (tele) end detection flag of the zooming lens group. When this flag TL is TL = 1, it means that the control circuit has detected that the zooming lens group is at the Tele end, and when TL = 0, it means that the tele end has not been detected. means.

The MFL stands for Macro Far Limit
(Limit) is a Far end detection flag of the focusing lens group driven by zoom driving in the macro area, that is, a Far end detection flag by driving the zooming lens group in the macro area. When this flag MFL is MFL = 1,
This means that the zooming lens group is determined to be a tele macro from the signal output from the zoom code plate 40, and that the control circuit has detected that the zoom lens group is at the far end during focusing. When MFL = 0, it means that the Far end has not been detected.

MNL stands for Macro Near L
(imit) is a Near end detection flag of the focusing lens group driven by zoom driving in the macro area, that is, a Near end detection flag by driving the zooming lens group in the macro area. When the flag MNL is MNL = 1, it is determined from the signal output from the zoom code plate 40 that the zooming lens group is determined to be a tele macro, and that the control circuit has detected that the zoom lens group is at the near end during focusing. means.
When MNL = 0, it means that the near end has not been detected.

SWREN is a release permission flag.
When EN is SWREN = 1, release is enabled and flag SWREN is
When SWREN = 0, it indicates that release is not allowed.

MF is Manual Focus
Abbreviation of "manual focus" indicates a flag. When the flag MF is MF = 1, it indicates that manual focus is being performed, and when MF = 0, it indicates that manual focus is not being performed.

AF is an abbreviation of auto focus and indicates a flag during auto focus. When the flag AF is AF = 1, it indicates that auto focus is being performed, and when the flag AF is 0, it indicates that auto focus is not being performed.

PZMACRO is a flag indicating whether or not the zooming lens group is in a macro area by a power zoom mechanism. This flag PZMACRO is PZMAC
When RO = 1, it means that the zooming lens group is in the macro area. When PZMACRO = 0, it means that the focusing lens group is not in the macro area.

AFGO indicates a focusing lens group drive flag. When the flag AFGO is AFGO = 1, it means that the AF motor M1 is operated to drive the focusing lens group, and AFGO = 0. Sometimes, it means that the focusing lens group is not driven by the AF motor M1.

PZGO indicates a zooming lens group drive flag. When the flag PZGO is PZGO = 1, it means that the PZ motor M2 is operated to drive the zooming lens group,
When = 0, it means that the zooming lens group is not driven by the PZ motor M2.

PZMGO indicates a flag indicating whether or not the zooming lens group is driven by the PZ motor M2 in the macro area. When the flag PZMGO is PZMGO = 1, it means that the zooming lens group is being driven. When it is 0, it means that it is not driven.

PZMODE is a flag indicating whether or not the zooming lens group can be driven by the power zoom mechanism.
When MODE = 1, driving is possible, and when PZMODE = 0, driving is impossible.

MAGIMG is a flag for starting the image magnification constant control. When MAGIMG = 1, the image magnification constant control is started.
When MG = 0, the image magnification constant control is not performed. ONIMG is a flag indicating whether image magnification constant control is being performed.
When G = 1, the image magnification constant control is being performed, and when ONIMG = 0, it means that the image magnification constant control is not being performed.

AFFARGO sets the focusing lens group to Far
AFNEARGO indicates processing for driving the focusing lens group in the near (near) direction. AFDRVF is a flag that indicates the driving direction of the focusing lens group in this process.
When = 1, the driving direction is the Far direction, and when AFDRVF = 0, the driving direction is not the Far direction but the Near direction.

PZTELGO indicates processing for driving the zooming lens group in the Tele direction, and PZWIDEGO indicates processing for driving the zooming lens group in the Wide direction. In addition, PZDRVF is a flag indicating which driving direction of the zooming lens group is in this process.When PZDRVF = 1, the driving direction is the Tele direction, and when PZDRVF = 0, the driving direction is not the Tele direction.
It means Wide direction.

MCRFARGO indicates a driving process of a zooming lens group for a focusing lens group in a macro area, and MCRNEARGO indicates a driving process of a zooming lens group for a focusing lens group in a macro area. MCRDRVF is a flag indicating which driving direction of the zooming lens group is in this process.
When 1, the driving direction is the Far direction, and when MCRDRVF = 0, it means that the driving direction is not the Far direction but the Near direction.

AFS is an in-focus priority mode flag, and AFS = 1
When AFS = 0, it means that priority is given to release rather than focus priority.

AFCORR is an abbreviation of AF CORRECT. When a zoom operation of a zooming lens group is performed during focusing priority, there is a shooting lens (for example, a varifocal lens) that is out of focus. This is a flag for making the correction. When AFCORR = 1, it means that the focus is corrected, and when AFCORR = 0, it means that this correction is not made.

The ON / OFF state of the macro switch means whether or not the zooming lens group is in the macro area in the information from the zoom code plate 40.

Next, a control operation of the camera control device having such a configuration will be described with reference to a flowchart.

When the lock switch SWLOCK is turned on, the operation of the control device including the camera control circuit 4 and the lens control circuit 5 starts as shown in FIG. 14, and is initialized in S1.

In this initialization, as shown in FIG. 40, first, in S1-1, an AF mode switch (AF mode switch), that is, a switch SWAF A / M, SWA for automatic manual switching.
It is determined whether F (A / M) is ON, and if it is ON
If YES (AF), proceed to S1-2; if not ON, proceed to S1-26 with NO (manual). In S1-2, the focus lens, that is, the focusing lens group, is driven to the far end (far end).

This driving process is performed by a subroutine shown in FIG. In the S-AFG1 shown in FIG.
By operating 45 and operating the AF motor M1,
The focusing lens group is driven to the far end side. Then, the Far direction drive flag AFDRVF = 1 is set in S-AFG2, and S-AFG
3 sets the focusing lens group driving flag AFGO = 1, sets the focusing lens group's Near Limit (near limit end), that is, the near end detection flag NL to NL = 0, and sets the Far Limit (Far Limit) to the S-AFG4. Limit), that is, the far end detection flag FL is set to FL = 0, and the process returns to FIG. 40 and shifts to S1-3.

While the focusing lens group is being driven to the far end, a driving pulse is output from the AF pulser 48,
This drive pulse is input to the lens CPU 44. Whether or not this drive pulse is output from the AF pulser 48 is shown in FIG.
Determined in S1-3. This determination is made based on whether the pulse interval is equal to or longer than 100 msec, and if NO (less than 100 msec) is output, YES (10
It repeats the judgment until it reaches 0 msec).
When the pulse interval exceeds 100 msec, the focusing lens group is driven to the far end and stopped, and the AF
The friction type clutch that links the motor M1 and the focusing lens group is slipping. Therefore, when the pulse interval becomes 100 msec or more, YES (1
At 00msec or more), the flow shifts to S1-4 to perform AFSTOP. This AFSTOP
Then, as shown in FIG. 47, it is determined whether or not the focusing lens group is being driven (AFGO = 1) by the S-AS1, and if not, the process proceeds to S1-5 in FIG. 40 with NO. I do. If the focusing lens group is driven according to the judgment of S-AS1, YES is returned to SA.
The process proceeds to S2, in which the driving of the focusing lens group is stopped by stopping the operation of the AF motor M1, and the process proceeds to S-AS3. In this S-AS3, the focusing lens group driving flag AFGO is set to AFGO = 0 indicating non-driving,
The process moves to S1-5 in FIG. In S1-5, the Far end detection flag FL of the focusing lens group is set to FL = 1. At this time, since the focusing lens group is not at the near end,
Then, the flow shifts to S-6, where the near end detection flag NL of the focusing lens group is set to NL = 0.

If the AF mode switch of S1-1, that is, whether the auto / manual switch SWAFA / M is ON or not (NO), the position of the focusing lens group is determined. Since it is not known whether or not it is, the process proceeds to S1-26, and the Far end detection flag FL is set to FL = 0.
The ar end detection flag NL is set to NL = 0, and the flow shifts to S1-7.

At the stage of S1-7, since the focusing lens group is at the far end and the number of drive pulses Pinf from the far end of the focusing lens group is 0, Pinf = 0 is set. Thereafter, in S1-8, the zooming lens, that is, the zooming lens group
The wide end detection flag WL is set to WL = 0, the tele end detection flag TL of the zooming lens group is set to TL = 0 in S1-9, and the far end detection of the focusing lens group by driving the zoom ring in the macro area is performed in S1-10. The flag MFL is set to MFL = 0, the near end detection flag MNL of the focusing lens group by the zoom ring drive in the macro area is set to MNL = 0 in S1-11, the release permission flag SWREN is set to SWREN = 0 in S1-12, In step S1-13, the flag MF during manual focus is set to MF = 0, and in step S1-14, the flag AF during auto focus is set to AF = 0, and the process proceeds to step S1-15.

In S1-15, the macro switch is turned ON to determine whether or not the macro area is present. If YES (ON), the flow shifts to S1-16 to set the macro area flag PZMACRO to PZMACRO = 1, and NO
If (OFF), proceed to S1-17 and set the flag PZMA in the macro area.
The process proceeds to S1-18 with the CRO set to PZMACRO = 0.

In S1-18, the focusing lens group drive flag AFGO is set to AFGO = 0. In S1-19, the zooming lens group drive flag PZGO is set to PZGO = 0.
AF drive flag PZMGO by Z mechanism (power zoom mechanism) PZ
MGO = 0, and the flag PZMO during power zoom drive is set in S1-21.
DE is set to PZMODE = 0, the flag MAGIMG for starting the image magnification constant control is set to MAGIMG = 0 in S1-22, the image magnification constant control in progress flag ONIMG is set to ONIMG = 0 in S1-23, and for example, in S1-24, A 5 msec timer start is started, a timer interrupt is permitted in S1-25, and the flow shifts to S2 in FIG.

In S2, the AF mode switch, that is, the auto mode
It is determined whether or not the manual switch SWAF A / M is ON, and if it is ON, the process proceeds to S3 with YES (AF) and ON.
If not, the process shifts to M in FIG. 23 with NO (manual).

At S-M1 in FIG. 23, it is determined whether or not the AF mode switch (switch SWAF A / M) is turned on and the AF operation is being performed (AF = 1). If YES (during AF operation), the flow shifts to K in FIG. 35, and if NO, the manual focus flag MF is set in S-M2.
Is set to MF = 1, and the process shifts to S-M3. After the defocus amount dx of the focusing lens group is obtained in S-M3, it is determined in S-M4 whether the contrast is low. If the contrast is low in this determination, the process proceeds to S-M7 with YES to turn off the in-focus display, and if NO, the process proceeds to S-M5 to determine whether or not focus is achieved. If NO in S-M5, the flow shifts to S-M7 to turn off the focus display, and if YES, the flow shifts to S-M6 to turn on the focus display, and returns to A in FIG. AF mode switch (switch SW
AF A / M) is determined to be ON (input), and if manual, the loop between M in FIG. 23 and A in FIG. 14 is repeated until it is turned ON.

When the process proceeds to K in FIG. 35 with YES (during AF operation) in S-M1 in FIG. 23, the timer interrupt is prohibited in S-K1, and the process proceeds to S-K2 AFSTOP processing. In this AFSTOP processing, as shown in FIG. 47, it is determined whether or not the focusing lens group is being driven (AFGO = 1) by the S-AS1, and if not driven, the determination is NO in S-AS1 of FIG. Move to ZOOMSTOP processing of K3. If YES, the driving of the focusing lens group is stopped by stopping the operation of the AF motor M1, and the S-AS3
And the focusing lens group driving flag AFGO = 1
Is set to AFGO = 0, and the flow shifts to S-K3 ZOOMSTOP processing in FIG. 35.

In this ZOOMSTOP processing, as shown in FIG. 48, it is determined whether or not the zooming lens group is being driven (PZGO = 1) in S-Z1, and if NO, the process proceeds to S-Z2. It is determined whether or not AF drive (autofocus drive) is performed by the power zoom mechanism (PZ mechanism) in the macro area, and the PZ
If the AF is not being driven by the mechanism (PZMGO = 1), NO and the SK
Move to 4. When the zooming lens group is being driven by S-Z1, or when the AF drive is being performed by S-Z2 (PZMGO = 1), the operation proceeds to S-Z3 with YES, and the operation of the PZ motor M2 is stopped. To stop the driving of the zooming lens group.
The zooming lens group driving flag PZGO is set to PZGO = 0,
In S-Z5, the flag PZMGO is set to PZMGO = 0, and the flow shifts to S-K4 in FIG.

In S-K4, the in-focus display is turned off, and the flow shifts to S-K5. The S-K5 uses an AF mode switch (switch SWAF
(A / M) is input (ON) or not.
The process shifts to S-K6, and if YES (AF), shifts to the AFFARGO process of S-K7. In the S-K6, the focusing lens group Fa
The end detection flag FL and the focusing lens group Near end detection flag NL are set to FL = NL = 0, and the flow shifts to S-K12.

In the AFFARGO of the S-K7, the focusing lens group is set in the subroutine shown in FIG.
Drive in the Far direction and set each flag to AFDRVF = 1, AFGO = 1, NL = 0,
The process shifts to S-K8 in FIG. 35 as FL = 0.

While the focusing lens group is driving in the Far direction, a driving pulse is output from the AF pulser 48, and the driving pulse is input to the lens CPU 44.
The S-K8 determines whether or not the driving pulse is output from the AF pulser 48. The judgment is that the pulse interval is 100mse
Performed when c is greater than or less than c, and if NO (less than 100 msec), YES
(100 msec or more) and repeat the judgment by looping. When the pulse interval becomes 100 msec or more, the focusing lens group is driven to the far end and stopped, and the friction clutch that links the AF motor M1 and the focusing lens group slips. Wake up. Therefore, when the pulse interval becomes 100 msec or more, the processing shifts to S-K9 with YES (or more) to perform the AFSTO processing. this
In the AFSTOP processing, as shown in FIG. 47, it is determined whether or not the focusing lens group is being driven (AFGO = 1) by the S-AS1,
If not, the process proceeds to S-K10 in FIG. 35 with NO, and if YES, the operation of the focusing lens group is stopped by stopping the operation of the AF motor M1, and the process proceeds to S-AS3 for focusing. The flag AFGO for driving the focusing lens group is set to AFGO = 0, and the flow shifts to S-K10. In S-K10, the Far end detection flag FL of the focusing lens group is set to FL = 1. At this time, since the focusing lens group is not at the near end,
The flow shifts to K11, where the near-end detection flag NL of the focusing lens group is set to NL = 0, and the flow shifts to S-K12.

At the stage of S-K12, since the focusing lens group is at the Far end, the number of drive pulses Pinf from the Far end of the focusing lens group is 0, so that Pinf = 0. Thereafter, in S-K13, the Wide end detection flag WL of the zooming lens, that is, the zooming lens group, and the Tele end detection flag TL of the zooming lens group are set to WL = TL = 0. Also, SK
In FIG. 14, the Far end detection flag MFL of the focusing lens group driven by the zoom ring in the macro area and the focusing lens group driven by the zoom ring in the macro area are driven.
The near end detection flag MNL is set to MFL = MNL = 0. In the S-K15, the image magnification constant control flag ONIMG is set to ONIMG = 0, and in the S-K16, the flag MAGIMG for starting the image magnification constant control is set to MAGI.
MG = 0, flag M during manual focus on S-K17
Set F and AF flag during autofocus to MF = AF = 0, S-
In K18, the auto focus correction flag AFCORR = 0
Then, in S-K19, the timer interruption is permitted, and the process returns to S2 in FIG.

In the judgment of S2, if the switch SWAF A / M for automatic / manual switching is ON, YES (AF) and S3
Move to In this S3, manual focus flag
It is determined whether MF is MF = 1 or not.
Then, the process proceeds to K, and if NO, the process proceeds to S4.

At S4, it is determined whether or not the photometric switch SWS is turned on. If not, the photometric switch SWS is turned on.
Return to S2 and repeat the above operation until is turned ON. Also,
If ON, shift to S5 and auto focus flag AF
Is set to AF = 1, the defocus amount dx of the focusing lens group is calculated in the next S6, and the process shifts to S7. In S7, it is determined whether or not the subject has low contrast based on the amount of light from the subject incident on the light receiving element 10. If the contrast is low, YES
Return to S2 until the contrast increases, and repeat the above operation. If NO, that is, if the contrast is not low, the flow shifts to S8 in FIG. In this S8, it is determined whether or not the camera is in focus. If NO (out of focus), the flow shifts to S9; if YES (focus), the flow shifts to S21. In S21, it is determined whether or not the flag MAGIMG for starting the image magnification constant control when the image magnification constant mode switch SWPZC is turned on (turned on), that is, MAGIMG
It is determined whether or not = 1. If the flag MAGIMG is set, the in-focus display is turned off in S25 with YES, and the process shifts to B in FIG.
If the flag MAGIMG is not set, the process proceeds to S22 with NO and the focus indication is turned on, and then the release permission flag SWREN is set to SWREN.
The process shifts to S24 as = 1. In this S24, it is determined whether or not AFS = 1, that is, the focus / release priority switch SWAF S / C
Enters the S side (focusing priority side) to determine whether the focusing priority flag AFS = 1 is set. If YES, the focus is locked by looping. If NO, that is, if the AFC side (release priority side), the process returns to S2.

[0091] Also, if it is determined in S8 whether or not the camera is in focus, NO (out of focus) is determined.
When the process proceeds to S9, the release permission flag SWRE is
N is set to SWREN = 0 and the process proceeds to S10. Then, in S10, the in-focus display is turned off and the process proceeds to S11. In step S11, the driving amount of the focusing lens group is calculated based on the defocus amount dx obtained in step S6.
The process proceeds to S12 after calculating dp. In S12, it is determined whether or not the driving direction of the focusing lens group is the Near direction, and YES (Ne
(ar direction), the process proceeds to S13, and if NO (Far direction), S18.
Move to

In S13, the focusing lens unit Nea
It is determined whether or not the r-end detection flag NL is NL = 1, that is, whether or not the focusing lens group is at the Near Limit (Near end).
Focusing lens group at the near end (Near Limit) and NL
If = 1, the process proceeds to I in FIG. 22, and if the focusing lens unit is not at the near end (Near Limit) and is NO, S1
Move to 4. In S18, it is determined whether or not the focusing lens group Far end detection flag FL is FL = 1, that is, whether or not the focusing lens group is at the Far end (Far Limit). Focusing lens group at far end (Far Limit)
If FL = 1, the process proceeds to I in FIG. 22.If the focusing lens group is not at the Far end (Far Limit) and NO, S1
Move to 9.

When the process shifts to I in FIG. 22, it is determined in S-I1 whether the power zoom drive enable flag PZMODE is PZMODE = 1. If NO, the process returns to S2 in FIG. If YES, the process proceeds to S-I2. In this S-I2, the macro switch is turned ON and the macro area flag PZMACRO is set to PZMAC
It is determined whether or not RO = 1. If NO, the process returns to S2 in FIG. 14 to loop, and if YES, the process proceeds to S-I3. This S-I3
Then, the focusing drive amount zdpx by the zooming lens group is calculated from the above-described defocus amount dx, and the flow shifts to S-I4. In S-I4, it is determined whether the focusing direction by the zooming lens group is the Far direction or the Near direction.If YES (Near direction), the process proceeds to S-I5.If NO (Far direction), the process proceeds to S-I12.
Move to Then, in S-I5, it is determined whether or not the Near end detection flag MNL of the focusing lens group by the zoom ring drive in the macro area is MNL = 1, and if YES, S2 in FIG.
Then, if NO, the process proceeds to MCRNEARGO processing of S-I6. Also, in S-I12, it is determined whether the Far end detection flag MFL of the focusing lens group by the zoom ring drive in the macro area is MFL = 1, and if YES, the process returns to S2 in FIG. 14 to loop and NO If so, the flow shifts to MCRFARGO processing in S-I13.

In the processing of S-I6, the zooming lens group is driven in the Near direction as shown in FIG. 46, and in the processing of S-I13, the zooming lens group is driven in the Far direction as shown in FIG.

That is, in the processing shown in FIG. 46, S-MNG1
The PZ motor M2 is operated to drive the zooming lens group in the Near direction, and the S-MNG2 sets the Far direction drive flag MCRDRVF of the zooming lens group in the macro area to MCRDRV.
F = 0 (Near direction), zooming lens group driving flag PZMG for focusing in the macro area with S-MNG3
O is set to PZMGO = 1 (during driving), the tele-end detection flag TL of the zooming lens group is set to TL = 0 in S-MNG4, and the Wide end detection flag WL of the zooming lens group is set to WL = 0 in S-MNG5. Ne by driving a zooming lens group in the macro region with S-MNG6
The ar edge detection flag MNL is set to MNL = 0, and the S-MNG 7 is used to drive the zoom lens group in the macro area.
FL is set to MFL = 0, and the flow shifts to S-I7 in FIG.

In the processing of S-I13, as shown in FIG. 45, the PZ motor M2 is operated by the S-MFG1 to drive the zooming lens group to the far end, and the zooming in the macro area is performed by the S-MFG2. Far direction drive flag MCRDR of lens group
Set VF to MCRDRVF = 1 (Far direction), set the zooming lens group driving flag PZMGO for focusing in the macro area in S-MFG3 to PZMGO = 1 (during driving), and set S-MFG4 to Tele in the zooming lens group. The end detection flag TL is set to TL = 0, and the S-MNG5 sets the wide end detection flag WL of the zooming lens group to WL = 0 and S-MNG5.
In MFG6, the near-end detection flag MNL by driving the zooming lens group in the macro area is set to MNL = 0, and in S-MFG7, the far-end detection flag MFL by driving the zooming lens group in the macro area is set to MFL = 0. Move to I7. During driving of the zooming lens group, a driving pulse is output from the PZ pulser 49, and the driving pulse is input to the lens CPU.

In S-I7, it is determined by the focusing drive amount zdpx by the zooming lens group obtained in S-I3, that is, whether or not the zooming lens group is driven by zdpx. If YES, the process proceeds to S-I14 with YES and ZOOMST in FIG.
After performing the OP processing, the process returns to S2 in FIG. If NO, S-I8
Move to

In this S-I8, the driving pulse is applied to the PZ pulser 49
Is output. This determination is made depending on whether the pulse interval is equal to or longer than 100 msec. When this pulse interval becomes 100 msec or more, the zooming lens group is driven to the Far end or Near end and stopped, and the friction clutch that links the PZ motor M2 and the zooming lens group slips. State. Therefore, when the pulse interval becomes 100 msec or more, the process shifts to S-I9 with YES (or more), performs the ZOOMSTOP process of FIG. 48, and shifts to S-I10. In S-I10, it is determined whether the driving direction is the Far direction or not, and if NO (Near direction), S-I11
Then, the near-end detection flag MNL by driving the zooming lens group in the macro area is set to MNL = 1, and the process returns to S2 in FIG. 14.If YES (Far direction), the process returns to S-I15 to perform the zooming lens in the macro area. The Far end detection flag MFL by group driving is set to MFL = 1, and the process returns to S2 in FIG.

Also, when shifting from S13 to S14 in FIG. 15, the focusing lens group is driven in the Near direction as shown in FIG. 42, and when shifting from S18 to S19, the focusing lens group is shifted. Processing for driving the group in the Far direction as shown in FIG. 41 is performed.

In the processing of FIG. 41, the focusing lens group is driven in the Far direction by S-AFG1, and the flag AFDRVF in which the driving direction of the focusing lens group is in the Far direction by S-AFG2.
Is set to AFDRVF = 1 (Far direction), the flag AFGO during focusing lens group driving by S-AFG3 is set to AFGO = 1 (driving), and
Focusing lens group Near end detection flag NL with AFG4
NL = 0, the focusing lens group Far end detection flag FL is set to FL = 0 in S-AFG5, and the flow shifts to S15 in FIG.

In the process of FIG. 42, the focusing lens group is driven in the Near direction by S-ANG1, and the process proceeds to S-ANG2. In this S-ANG2, since the driving direction of the focusing lens group is not the Far direction but the Near direction, the flag AFDRVF in which the driving direction of the focusing lens group is in the Far direction is set to A.
FDRVF = 0 (Near direction), the focusing lens group driving flag AFGO is set to AFGO = 1 in S-ANG3, the focusing lens group Near end detection flag NL is set to NL = 0 in S-ANG4, S-
ANG5 sets the focusing lens group Far end detection flag FL to F
At S15, it is determined whether or not the focusing lens group has been driven by the drive amount dp obtained at S11. To the focusing lens group
After performing the AF drive stop processing, the focusing lens group is stopped, and the process returns to S2 and loops. If NO, S16
To determine whether the interval between the drive pulses output from the AF pulser 48 is 100 msec or more and NO (less than 100 msec).
If so, a loop is made until YES (100 msec or more) is reached, and that determination is repeated. When the pulse interval becomes 100 msec or more, the driving of the focusing lens group is stopped and AF
The friction type clutch that links the motor M1 and the focusing lens group is slipping. Therefore, when the pulse interval becomes 100 msec or more, the flow shifts to S17, performs AF end point processing, shifts to S2, and loops.

[AF endpoint processing (FIG. 25)] The endpoint processing in S17 is shown in FIG.
This is performed as shown in FIG. In this process, the AF-stop process of FIG. 47 is performed in S-AFE1 as described above to stop the driving of the focusing lens group, and the process proceeds to S-AFE2. In this S-AFE2, the number of pulses dpx driven until the focusing lens group is stopped is counted from the output of the AF pulser 48, and is obtained.
Move to In this S-AFE3, it is determined whether the driving direction of the focusing lens unit is in the Far direction or not.
If it is S, it shifts to S-AFE12, and if it is the Near direction, it shifts to S-AFE4 with NO.

In this S-AFE4, the number of extended pulses Pinf of the focusing lens group is changed by the focusing lens group.
The process proceeds to S-AFE5 by replacing the number of pulses Pinf delivered from the far end by the value obtained by adding the number of drive pulses dpx obtained by S-AFE2.

In this S-AFE5, the absolute value of the pulse number Pnear from the pulse number Pinf to the near end of the focusing lens group obtained from S-AFE4 until the focusing lens group hits the far end to the near end is calculated. The result of calculating | Pinf-Pnear | is Plmt
And move to S-AFE6.

In the case of detecting the end point, since the number of pulses from the far end to the near end is known, this may be set as the number of driving pulses of the focusing lens group toward the near end. Focusing lens group
In some cases, it may stop without being driven to the Near end, so it is necessary to consider this case. On the other hand, since the pulse number Pnear is a value known in advance by the lens, if the focusing lens group hits the near end, the result when subtracting Pinf-Pnear and taking its absolute value is Should be "0". Therefore, if the focusing lens group hits the near end, the result of this subtraction must be "0", but taking into account that some error may occur, the result of the subtraction Is within the allowable value, it is assumed that the focusing lens group is at the end point. The number of pulses Pnea
r is a value known in advance by the lens and is stored in the lens ROM in advance as fixed data.

Therefore, in S-AFE6, it is determined whether or not the number of pulses at the end point is within the allowable value ε, that is, | Pinf-Pn
If ear | is within the allowable value ε, the process proceeds to S-AFE10 with YES, and if ear | is out of the allowable value ε, the process proceeds to S-AFE7 with NO. Here, the allowable value ε means a pulse in a range in which the focusing lens group can be driven with almost no error within this range, for example, 10 pulses. Then, in S-AFE7, the processing of driving the focusing lens group in FIG.
Move to

Here, this focusing lens group is Ne
During driving in the ar direction, a driving pulse is output from the AF pulser 48, and the driving pulse is input to the lens CPU 44. Whether or not this drive pulse is output from the AF pulser 48 is determined by the S-AFE 8. This judgment is made when the pulse interval is 10
The determination is made at 0 msec or more, and if NO (less than), the determination is repeated by looping until YES (or more), that is, until an end point is detected. When this pulse interval becomes 100 msec or more, the focusing lens group is driven to the near end and stopped, and the friction clutch that links the AF motor M1 and the focusing lens group slips. State. Therefore, when the pulse interval becomes 100 msec or more, the process proceeds to S-AFE 9 with YES (or more), performs the AFSTOP processing shown in FIG. 47, and proceeds to S-AFE 10. In this S-AFE10, the near-end detection flag NL of the focusing lens group is set to NL = 1.
Then, the processing shifts to S-AFE11. In this S-AFE11, Pinf = Pnear, and the processing shifts to S2 in FIG.

When the drive direction of the S-AFE 3 shifts to the S-AFE 12 with YES (Far direction) in determining whether or not the drive direction is the Far direction,
In this S-AFE12, the number of extension pulses Pinf of the focusing lens group is set to a value obtained by subtracting the number of drive pulses dpx obtained in S-AFE2 from the number of pulses Pinf of the focusing lens group extended from the far end. Replace with S-AFE13.

In this S-AFE13, the absolute value of the pulse number Pinf of the focusing lens unit up to the far end obtained in S-AFE12 |
Calculate Pinf-dpx | and shift to S-AFE14. Here, the focusing lens group may stop without being driven to the Far end for some reason. Therefore, it is necessary to detect this case. On the other hand, if the focusing lens group hits the Far end, the absolute value of Pinf, that is, Pinf-dPx of S-AFE12
(Ie, the result of the subtraction of S-AFE12) should be “0”. Therefore, if the focusing lens group hits the far end, the result of this subtraction must be “0”. However, considering some errors, if this error is within the allowable value, the focusing It is assumed that the single lens group hits an end point.

In S-AFE 14, it is determined whether or not the number of pulses at the end point is within allowable value ε. That is, if | Pinf | is within allowable value ε, the process proceeds to S-AFE 18 with YES, and If it is out of ε, move to S-AFE15 with NO. Then, in the S-AFE15, as described above, the focusing lens group is
A process of driving to the end side is performed.

Here, this focusing lens group is Fa
During driving to the r end, a driving pulse is output from the AF pulser 48, and the driving pulse is input to the lens CPU 44. Whether this drive pulse is output from AF pulser 48
Determined by S-AFE16. In this judgment, the pulse interval is 100msec
If the answer is NO (less than), the determination is repeated by looping until YES (or more), that is, until an end point is detected. When the pulse interval becomes 100 msec or more, the focusing lens group is driven to the far end and stopped, and the friction clutch that links the AF motor M1 and the focusing lens group slips. Wake up. Therefore, when the pulse interval becomes 100 msec or more, the processing shifts to S-AFE 17 with YES (or more) and the AF shown in FIG.
Perform STOP processing, shift to S-AFE18, set the Far end detection flag FL of the focusing lens group to FL = 1, and set Sinf
Then, the process shifts to S2 in FIG.

[AF Drive Stop (FIG. 24)] The AF drive stop process in S20 is performed as shown in FIG. In this process, the AF-stop process of FIG. 47 is performed by the S-AFS1 as described above to stop the driving of the focusing lens group, and the process shifts to S-AFS2. This S-AFS2
Then, the number of pulses dpx driven until the focusing lens group is stopped is obtained by counting from the output of the AF pulser 48.
-Move to AFS3. In S-AFS3, it is determined whether the driving direction is the Far direction. If YES (Far direction), the process proceeds to S-AFS11, and if NO (Near direction), the process proceeds to S-AFS4.

In this S-AFS4, the number of extended pulses Pinf of the focusing lens group is changed by the focusing lens group.
The number of pulses Pinf delivered from the far end is replaced by the value obtained by adding the number of drive pulses dpx (equivalent to dp) obtained by S-AFS2, and the process proceeds to S-AFS5.

In S-AFS5, the number of pulses at the end point is Pnea
It is determined whether the value is smaller than r (within the range), and if YES (within the range), the flow shifts to S2 in FIG. 14; Then, in S-AFS6, as shown in FIG. 42, processing for driving the focusing lens group in the Near direction is performed.

Here, this focusing lens group is Ne
During driving in the ar direction, a driving pulse is output from the AF pulser 48, and the driving pulse is input to the lens CPU 44. Whether or not this drive pulse is output from the AF pulser 48 is determined by the S-AFS7. This judgment is made when the pulse interval is 10
The determination is made at 0 msec or more, and if NO (less than), the determination is repeated by looping until YES (or more), that is, until an end point is detected. When this pulse interval becomes 100 msec or more, the focusing lens group is driven to the near end and stopped, and the friction clutch that links the AF motor M1 and the focusing lens group slips. Wake up. Accordingly, when the pulse interval becomes 100 msec or more, the process proceeds to S-AFS8 with YES (or more) to perform the AFSTOP processing shown in FIG. 47, and proceeds to S-AFS9 to perform the near end of the focusing lens group. Set the detection flag NL to NL = 1, and set S-AFS10 to P
The process proceeds to S2 in FIG. 14 as inf = Pnear.

If the drive direction of the S-AFS3 is shifted to the S-AFS11 with YES (Far direction) in the determination as to whether or not the drive direction of the S-AFS3 is in the Far direction, the S-AFS11 executes the extension pulse of the focusing lens group. Several Pinf, Focusing lens group Far
The process proceeds to S-AFS12 by replacing the number of pulses Pinf extended from the end with the value obtained by subtracting the number of drive pulses dpx obtained in S-AFS2 from the number Pinf.

In this S-AFS12, the number of pulses P at the end point
It is determined whether or not inf is greater than or equal to 0 (out of the range) .If YES (in the range), the process shifts to S2 in FIG. 14, and if NO (out of the range), SA
Migrate to FS13. Then, in S-AFS13, the processing for driving the focusing lens group in the Far direction of FIG. 41 as described above is performed.

Here, this focusing lens group is Fa
During driving in the r direction, a driving pulse is output from the AF pulser 48, and this driving pulse is input to the lens CPU 44. Whether this drive pulse is output from AF pulser 48
Determined by S-AFS14. In this judgment, the pulse interval is 100msec
The determination is made in accordance with the above or less, and if NO (less than), the determination is repeated in a loop until YES (or more), that is, until an end point is detected. When this pulse interval becomes 100 msec or more, the focusing lens group is driven to the far end and stopped, and the friction clutch that links the AF motor M1 and the focusing lens group slips. Wake up. Therefore, when the pulse interval becomes 100 msec or more, the process proceeds to S-AFS15 with YES (or more). And S-AF
In S15, AFSTOP processing shown in FIG. 47 is performed, and the flow shifts to S-AFS16. In the S-AFS16, the Far end detection flag FL of the focusing lens group is set to FL = 1, and in the S-AFS17, the Pinf = 0, as shown in FIG.
Shift to S2.

[Image magnification constant control] At S21 in FIG. 15, the image magnification constant mode switch SWPZC is turned on (turned on) as described above.
It is determined whether or not a flag MAGIMG for starting the image magnification constant control is set, that is, MAGIMG = 1. If the flag MAGIMG is MAGIMG = 1 and YES, the flow shifts to S25. In S25, the in-focus display is turned off and the flow shifts to B in FIG. In FIGS. 16 and 17, control for keeping the image magnification constant is performed.

At S-B1 in FIG. 16, the image magnification constant control flag ONIMG is set to ONIMG = 1 (during control), and the routine goes to S-B2. In S-B2, the amount of extension x ₀ from the infinity end of the focusing lens group is calculated, and the process proceeds to S-B3. In S-B3, the current focal length information f ₀ of the zooming lens group is input. Move to S-B4. In the S-B4, the feeding amount of x ₀ is determined whether f ₀ / 0.99 or smaller. In this determination, the feed amount x ₀ is f ₀ /
Whether it is smaller than 150 means that the image magnification is not too small for the constant image magnification control, and when the image magnification is too small, the change in the image magnification accompanying the movement of the subject is accurately determined. It cannot be detected. Therefore, in such a case, the process proceeds to S-B18 with YES, the in-focus display is turned off, and a control disable signal is generated at S-B19 to notify that the image magnification constant control is impossible. S-B20 sets the release permission flag SWREN to SWREN = 0, S-B21 sets the image magnification constant control flag ONIMG to ONIMG = 0 (non-controlling), and S-B22 starts the image magnification constant control flag. MAGIMG to MAGI
The process proceeds to S2 in FIG. 14 with MG = 0.

If the image magnification is not too small in the judgment of S-B4, the process moves to S-B5 with NO. In S-B5, the image magnification m ₀ = x ₀ / f ₀ is obtained, and the flow shifts to S-B6. In this S-B6,
The defocus amount dx is calculated, and the flow shifts to S-B7. This S-B7
Then, it is determined whether or not the subject has low contrast.If YES (low contrast), the flow shifts to S-B23 to set the release permission flag SWREN to SWREN = 0, and in S-B24, the in-focus display is turned off and S
Go to -B1 and loop until low contrast is no longer present. This is because, even when the subject disappears from the screen or when the contrast is lowered by shifting to the side, the image magnification constant control is continued when the subject returns to the predetermined position on the screen again, and the convenience in use is improved. That's why.

If NO, the process shifts to S-B8, where it is determined whether or not the camera is in focus. If YES (in focus), it means that the contrast is correct and the subject has not moved compared to the previous time, so the flow shifts to S-B16 and the release permission flag SWREN is set to SWREN = 1 (release release ), And the flow shifts to S-B17 to turn on the in-focus display, and returns to S-B1 for a loop. On the other hand, if the determination in S-B8 is NO (out of focus), the lens must be moved.
Calculate the driving amount dp of the focusing lens group from dx and calculate S-
Move to B10. In S-B10, the focal length when the defocus amount dx occurs is obtained from Expression (7), and the flow shifts to S-B11. Here, the focal length f in equation (7) is f1. Here, the focal length at the Wide end of the focusing lens group is fW and Te
Assuming that the focal length at the le end is ft, f1 needs to be in the range of fW <f1 <ft in order to perform the image magnification constant control.
Therefore, this determination is made in S-B11, and if f1 is not within the range of fW <f1 <ft, the process proceeds to S-B25 with NO, sets the release permission flag SWREN to SWREN = 0, and focuses on S-B26. The display is turned off, and the flow shifts to E in FIG. The processing of E is such that f1 is fW <f1 <ft
This is the process waiting to enter the range.

[0123] proceeds to S-B13 after f1 is determined in S-B11 have sought fW <f1 <control image magnification gamma = f1 / f ₀ the process proceeds to S-B12 is YES if within the range of ft I do. In S-B13, constants A, B, and C for calculating the driving amount Pz of the zooming lens group are
Input from OM43 to lens CPU44 or main CPU6 and S-B14
Move to In S-B14, the driving amount Pz of Expression (11) is calculated using the constants A, B, and C, and the flow shifts to S-B15. And S-B15
Then, it is determined whether dp = Pz = 0 or not.
Move to 18 N. Also, if both are YES at 0, the process proceeds to S-B16, the release permission flag SWREN is set to SWREN = 1 (release permitted), the process proceeds to S-B17, the focus indication is turned on, and the process returns to S-B1. Loop.

According to the judgment of S-B15, at least one of dp and Pz is 0.
If not, the process moves to N in FIG. 18 and the focus indication is turned off at S-N1 and the release permission flag SWREN is set at S-N2 at SWREN.
The process moves to S-N3 with = 0. In S-N3, it is determined whether the driving amount dp of the focusing lens group is 0 or not.
Shift to S-N9 with S. In S-N9, it is determined whether or not the driving amount Pz of the zooming lens group is 0.
Move to 9D.

If the driving amount dp is not 0 in S-N3, NO and S
The process shifts to -N4, and in S-N4, it is determined whether the driving direction of the focusing lens unit is in the Far direction. If it is the Near direction, the process proceeds to S-N5 with NO, and if it is the Far direction, the process proceeds to S-N7 with YES. In this S-N5, Ne of focusing lens group
It is determined whether or not the ar end detection flag NL is NL = 1, and the end point is detected. If NL = 1 and YES, the flow returns to B in FIG. 16 to loop, and if NO, the flow proceeds to S-N6. In S-N7, Far end detection flag F
Judges whether L is FL = 1 or not, detects the end point, and if FL = 1, Y
The ES returns to B in FIG. 16 and loops. If NO, the process proceeds to S-N8. In S-N6, the AFFARGO process of driving the focusing lens group of FIG. 41 in the Far direction is performed, and in S-N8, the AF driving the focusing lens group of FIG. 42 in the Near direction is performed.
Perform NEARGO processing and then move to S-N9. In the determination of S-N9, it is determined whether or not the drive amount Pz is 0. If not, the process proceeds to S-N10 with NO. In S-N10, it is determined whether the driving direction of the zooming lens group is the Tele direction. And Te
If the direction is the le direction, the process proceeds to S-N11 with YES to perform the PZTELEGO processing of FIG. 43 for driving the zooming lens group in the Tele direction. If the judgment is S-N10 and the direction is the Wide direction, the process proceeds to S-N12 with NO and drives the zooming lens group in the Wide direction.
Perform DEGO processing.

In the PZTELEGO processing shown in FIG. 43, the zooming lens group is driven in the Tele direction by S-PTG1, and the Tele-direction drive flag PZDRVT of the zooming lens group is set to PZDRVT = 1 (Tele
Direction), and zooming lens group driving flag P with S-PTG3.
Let ZGO be PZGO = 1 (during driving). And S-PTG4 ~ S-PTG7
19, the Tele end detection flag TL, the Wide end detection flag WL, the Near end detection flag MNL by driving the zooming lens group in the macro area, and the Far end detection flag MFL by driving the zooming lens group in the macro area are set to 0, respectively.
Move to D.

In the PZWIDEGO processing of FIG. 44, the zooming lens group is driven in the Wide direction by S-PWG1, and the telephoto is driven by S-PWG2.
Set the direction drive flag PZDRVT to PZDRVT = 0 (Wide direction) and set S-PW
At G3, the zooming lens group driving flag PZGO is set to PZGO = 1 (during driving). In S-PWG4 to S-PWG7, a Tele end detection flag TL, a Wide end detection flag WL, a Near end detection flag MNL by driving a zooming lens group in a macro area, and a Far by driving a zooming lens group in a macro area.
The end detection flags MFL are set to 0, respectively, and the flow shifts to D in FIG.

In the processing of FIG. 19D, since the focusing lens group is within the zoom area, no end point is detected, and the processing always stops at somewhere. Then, only the zooming lens group detects the end point. In the processing of D in FIG. 19, `` (a) when both the focusing lens group and the zooming lens group are not moving, (b) only the zooming lens group is moving and the focusing lens group is not moving If (c) the zooming lens group is stopped and only the focusing lens group moves, (d) both the focusing lens group and the zooming lens group move and the focusing lens group moves first. And (e) when both the focusing lens unit and the zooming lens unit move and the zooming lens unit stops first. Hereinafter, each of these cases will be described.

[(A) When both the focusing lens unit and the zooming lens unit are not moving] S-D1 in FIG.
Then, the focusing lens group drive flag AFGO is set to AFGO = 1
(Driving) or not, and if YES, proceed to S-D2 for N
If O, shift to S-D13. In S-D13, it is determined whether or not the zooming lens group drive flag PZGO = 1 (during driving). If NO, the process shifts to S-D16. Then, in S-D16, the release permission flag SWREN is set to SWREN = 1, release release and in-focus display are performed, and in S-D17, driving stop processing of the focusing lens group shown in FIG. 24 is performed, and the flow shifts to S-D18.

At S-D18, it is determined whether or not the Far end detection flag FL of the focusing lens group is FL = 1 (end point detection). If the end point is detected, the process proceeds to B in FIG. The process loops, and if NO is detected without detecting an end point, the process shifts to S-D19. SD
In 19, the near end detection flag NL of the focusing lens group
Is NL = 1 (end point detection) is determined, and if YES, B in FIG.
To S-D20 if NO and no end point is detected
Move to

As described above, if NO in S-D18 and S-D19, NO means that the image magnification has become constant, so that the in-focus display is turned on in S-D20, and the release permission flag is turned on in S-D21. SWREN = SWREN =
Return to B in FIG. 16 and loop. Also, S-D18, S-D19
If YES is determined, the process returns to B in FIG. 16 and loops until the image magnification becomes constant.

[(B) When only the zooming lens group is moving and the focusing lens group is not moving]
In 19, focusing lens group drive flag AFGO with S-D1
It is determined whether or not AFGO = 1 (during driving). If YES, the process shifts to S-D2. If NO, the process shifts to S-D13. In this S-D13,
It is determined whether or not the zooming lens group drive flag PZGO = 1 (during driving). If YES, the process shifts to S-D14. In S-D14, it is determined whether the zooming lens group is driven by the driving pulse number Pz and the driving is completed. If NO, the process returns to S-D1 and the zooming lens group is driven by the driving pulse number Pz. Loop until When the zooming lens group is driven by the driving pulse number Pz in this manner, YES is determined in S-D14.
The operation proceeds to S-D15 at (drive end). In this S-D15, processing for stopping the zooming lens group shown in FIG.
Move to 6. Thereafter, the processing of S-D16 to S-D21 described above is performed, and the process returns to B in FIG. 16 and loops.

[(C) When the zooming lens group is stopped and only the focusing lens group is moving] In this case, the focusing lens group driving flag AF is set in S-D1.
In determining whether GO is AFGO = 1 (driving) or not, the process proceeds to S-D2 with YES (driving). In S-D2, it is determined whether or not the zooming lens group driving flag PZGO = 1 (driving). If NO (non-driving), the process shifts to S-D4. In S-D4, it is determined whether the focusing lens group has been driven by the number of pulses dp. If YES, the process shifts to S-D12 to perform the AFSTOP process of FIG. 47 to stop the focusing lens group, and returns to S-D1 to loop.

If NO in S-D4, the flow shifts to S-D5. In this S-D5, it is determined whether or not the AF pulse output interval output from the AF pulser 48 is 100 ms or more, and NO (100 ms
If it is less than (c), it returns to S-D1 and loops until it becomes 100 msec or more, and if YES (100 msec or more), it shifts to S-D6 and
The focusing lens group is stopped by performing the AFSTOP processing of, and the process shifts to S-D7.

In S-D7, it is determined whether or not the zooming lens group driving flag PZGO = 1 (during driving). Then, if the drive is not being performed and the determination is NO, the process shifts to S-D10, performs the end point processing in FIG. 25, and returns to B in FIG. 16 to perform a loop.

[(D) When both the focusing lens group and the zooming lens group are moving and the focusing lens group stops first] In this case, the focusing lens group driving flag is set in S-D1. In determining whether AFGO is AFGO = 1 (driving) or not, the process proceeds to S-D2 with YES (driving). This SD
In 2, the zooming lens group driving flag PZGO is set to PZGO = 1.
(Driving) is determined, and if YES (Driving), S-D3
Move to In S-D3, it is determined whether the zooming lens group has been driven by the number of drive pulses Pz and the driving has been completed, and if NO, the process proceeds to S-D4. In S-D4, it is determined whether or not the focusing lens group has been driven by the number of pulses dp, and if YES, the process shifts to S-D12 and FIG.
After the focusing lens group is stopped by performing the AFSTOP processing of (1) and returning to S-D1, the processing of S-D13 to S-D19 is performed.

If the determination in S-D4 is NO, the process shifts to S-D5. In this S-D5, it is determined whether or not the AF pulse output interval output from the AF pulser 48 is 100 ms or more, and NO (100 ms
If it is less than (c), it returns to S-D1 and loops until it becomes 100 msec or more, and if YES (100 msec or more), it shifts to S-D6 and
The focusing lens group is stopped by performing the AFSTOP processing of, and the process shifts to S-D7.

At S-D7, it is determined whether or not the zooming lens group driving flag PZGO = 1 (during driving). If YES during driving, the flow shifts to S-D8. In this S-D8, it is determined whether or not the zooming lens group has been driven by the number of drive pulses Pz based on the pulse output from the PZ pulser 49 and the drive has been completed. The process loops, and if YES, the process shifts to S-D9 to perform the stop processing of the zooming lens unit in FIG. 48 and shift to S-D10. In S-D10, after performing the end point processing of FIG. 25, the process returns to B of FIG. 16 and loops.

[(E) When both the focusing lens group and the zooming lens group are moving and the zooming lens group stops first] In this case, the focusing lens group driving flag AFGO of the S-D1 is set. In determining whether AFGO = 1 (during driving) or not, the process proceeds to S-D2 with YES (during driving). In S-D2, it is determined whether or not the zooming lens group driving flag PZGO = 1 (during driving). If YES (during driving), the process shifts to S-D3. In S-D3, it is determined whether the zooming lens group has been driven by the number of drive pulses Pz and the driving has been completed, and if YES, the process shifts to S-D11 to stop the zooming lens group in FIG. 48. After that, shift to S-D4.

In S-D4, it is determined whether the focusing lens group has been driven by the number of pulses dp. If YES, the flow shifts to S-D12 to perform the AFSTOP process in FIG. Stop the single lens group and return to S-D1. When this AFSTOP processing is performed, the focusing lens group drive flag AFGO is 0, so the determination in S-D1 becomes NO, and the processing in S-D13 to S-D21 described above is performed.

If NO in S-D4, the process shifts to S-D5. In this S-D5, it is determined whether or not the AF pulse output interval output from the AF pulser 48 is 100 ms or more, and NO (100 ms
If it is less than (c), it returns to S-D1 and loops until it becomes 100 msec or more, and if YES (100 msec or more), it shifts to S-D6 and
The focusing lens group is stopped by performing the AFSTOP processing of, and the process shifts to S-D7.

In S-D7, it is determined whether or not the zooming lens group driving flag PZGO = 1 (during driving). Then, if the drive is not being performed and the determination is NO, the process shifts to S-D10, performs the end point processing in FIG. 25, and returns to B in FIG. 16 to perform a loop.

In the determination of S-B11 in the processing of B in FIG. 16 described above, when the processing shifts to S-B25 and S-B26, the processing then shifts to E in FIG. In this E, when the constant image magnification control is outside the zoom range, "it is more desirable to move the zooming lens group to the end point than in the middle for the next processing", so this determination is made.

First, whether the zooming lens group is at the wide end or the tele end is determined using f1. In addition, when f1 is smaller than ft, f1 is smaller than fw, so that f1 and fw can be determined without determining both the magnitude relationship between f1 and ft and the magnitude relationship between f1 and fw.
If only the magnitude relationship with ft is determined, the magnitude relationship between f1 and fw can be determined at the same time.

Therefore, in S-E1 of FIG. 20, it is determined whether f1 is equal to ft or f1 is greater than ft, and
If it is equal to ft or f1 is larger than ft, it moves to S-E2 with YES because it is on the Tele end side, and moves to S-E13 with NO if f1 is less than ft because it is on the Wide end side. .

In S-E2, it is determined whether or not the Tele end detection flag TL of the zooming lens group is TL = 1 (end point detection). If an end point has been detected, the process proceeds to S-E7 with YES and NO in NO. If there is, move to S-E3. In this S-E3, the zooming lens group shown in FIG.
The processing for driving in the le direction is performed, and the flow shifts to S-E4. This S-
E4 is processing to keep waiting for the zooming lens group to detect an end point. If NO (less than 100 msec), the drive loops until the drive ends and YES, and YES (100 msec
If the above), the process proceeds to S-E5 and performs the ZOOMSTOP processing of FIG. 48 to stop driving the zooming lens group and perform S-E5.
Move to E6. In this S-E6, Tele of zooming lens group
The end detection flag TL is set to TL = 1, and the flow shifts to S-E7.

When the processing shifts from S-E2 or S-E6 to S-E7, the defocus amount dx of the focusing lens group is calculated at S-E7, and the processing shifts to S-E8. In S-E8, it is determined whether or not the subject has low contrast. If the contrast is low and YES, the process loops until there is a contrast, and if there is contrast, the process proceeds to S-E9 with NO. The S-E9 In calculates the feeding amount X ₀ of the focusing lens group moves to S-E10, calculates the S-E10 in Xf = ft · m ₀ shifts to S-E11.

In S-E11, dx + X ₀ is equal to Xf obtained in S-E10.
Depending on whether the image magnification is greater than or equal to
_It is determined whether or not it falls within the focal length of ₀ . If it is within this focal length, the process proceeds to S-E12 with YES and proceeds to S-E12.
After replacing the f ₀ to ft at E12, the process proceeds to start driving the S-B9 in FIG. 17. If the subject is farther than the focal length in the determination of S-E11, the process shifts to P in FIG. 21 with NO.

On the other hand, in the judgment of S-E1, if f1 is smaller than ft and located on the Wide end side and the operation proceeds to S-E13 with NO,
First, in S-E13, the Wide end detection flag W of the zooming lens group
It is determined whether or not L is WL = 1 (end point detection). In this determination, if an end point has been detected, the process proceeds to S-E18 with YES, and if NO, the process proceeds to S-E14. In S-E14, processing for driving the zooming lens group in FIG. 44 in the Wide direction is performed, and the flow shifts to S-E15. This S-E15 is processing to keep waiting for the zooming lens group to detect an end point. If NO (less than 100 msec), the drive loops until the drive is completed and YES, and if YES (more than 100 msec), the flow shifts to S-E16 and Z in FIG.
By performing the OOMSTOP processing, the driving of the zooming lens group is stopped, and the flow shifts to S-E17. In S-E17, the Wide end detection flag WL of the zooming lens group is set to WL = 1, and S-E17 is set.
Move to E18.

When the processing shifts from S-E13 or S-E17 to S-E18, the defocus amount dx of the focusing lens group is calculated at S-E7, and the processing shifts to S-E19. In S-E19, it is determined whether or not the subject has low contrast. If YES in low contrast, the process loops until there is a contrast, and if there is contrast, the process proceeds to S-E20 with NO in NO. The S-E20 In calculates the feeding amount X ₀ of the focusing lens group moves to S-E21, and calculating the in S-E21 Xn = fw · m 0, the process proceeds to S-E22.

[0151] In the S-E22, dx + X ₀ is the whether Xn is smaller than, whether the object is within the focal length of the image magnification m ₀ obtained last time is determined. By the judgment of S-E22,
This Within focal length shifts to S-E23 YES, the after replacing the f ₀ in S-E23 in fw, the process proceeds to start driving the S-B9 in FIG. 17. If the subject is closer than the focal length in the determination of S-E22, the process shifts to P in FIG. 21 with NO.

In S-P1 of FIG. 21, the driving amount dp of the focusing lens group is calculated from the defocus amount dx, and the flow shifts to S-P2. In S-P2, it is determined whether or not the driving direction of the focusing lens group is in the Far direction. If NO (Near direction), the process proceeds to S-P3, and if YES (Far direction), S-P9. Move to In this S-P3, it is determined whether the Near end detection flag NL of the focusing lens group is NL = 1, and if the end point is detected,
If YES, shift to S-P8. If NO, shift to S-P4. In S-P9, it is determined whether or not the Far end detection flag FL of the focusing lens group is FL = 1, and if the end point is detected, YES
The process proceeds to S-P8, and if NO, proceeds to S-P10. Then, in S-P4, processing for driving the focusing lens group in FIG. 42 in the Near direction is performed, and in S-P10, processing for driving the focusing lens group in FIG. 41 in the Far direction is performed. Move to

In S-P5, it is determined whether or not the focusing lens group has been driven by the drive amount dp. If the driving has been completed, the process proceeds to S-P11 with YES, and if NO, the process proceeds to S-P11. -Move to P6. In this S-P6, it is determined whether or not the pulse interval output from the AF pulser 48 is 100 ms or more, and NO (100 ms
If it is less than c), the flow returns to S-P5 to loop, and if YES (100 msec or more), the flow shifts to S-P7. In S-P7, the AF end point processing of FIG. 25 is performed, and the flow shifts to S-P8. In S-P11, the AF drive stop processing of FIG. 24 is performed, and the flow shifts to S-P8. And in S-P8,
It is determined whether the zoom lens group Tele end detection flag TL is TL = 1 or not. If the end point has been detected, the process proceeds to S-E7 in FIG. 20 with YES, and if NO, the process proceeds to G in FIG. Repeat the same.

[Timer interrupt processing (FIGS. 26 and 27)] S-T1 in FIG. 26
Then, the timer interrupt is prohibited, and the process proceeds to S-T2. In S-T2, the AF mode switch (switch SWAF A / M) is input (ON) to determine whether or not the camera is in the AF mode.
Shift to -T3, and if NO (manual), shift to S-T15. On S-T15, power zoom mode switch SWPZ is ON
It is determined whether or not the operation is ON. If the switch is ON, the process proceeds to S-T16 with YES, and if the switch is OFF, the process proceeds to S-T19 with NO. And
In the S-T16, the power zoom drive enable flag PZMODE is set to PZMODE =
In step S-T19, the power zoom drive enable flag PZMODE is set to PZMODE = 0 (drive disabled), and the process proceeds to S-T17. In S-T17, it is determined whether or not the auto focus flag AF is AF = 1 (during auto focus).
The process proceeds to K, and if NO, proceeds to S-T18. In S-T18,
The power zoom drive check shown in FIGS.
Move to H.

At S-H1 in FIG. 28, the release switch SWR is
It is determined whether or not N is performed. If it is ON, the process proceeds to S-H2 with YES, and if not, the process proceeds to S-H12 with NO. Then, in S-H12, the lens storage check process of FIG.
The flow shifts to -H13, where the power zoom drive check shown in FIGS. 31 to 33 is performed in S-H13, and the flow shifts to S-H14. In S-H14, the timer interrupt is permitted and the timer interrupt processing ends.

When it is determined in S-H1 that the release switch SWR is ON, and the flow shifts to S-H2, in S-H2, whether the manual focus flag MF is MF = 1 (manual focus) or not. Is determined. If the manual focus is being performed, the process proceeds to S-H5 with YES, and if NO, the process proceeds to SH
Move to 3. In S-H3, it is determined whether the focus / release priority switch SWF S / C is in focus priority (AFS) or not. , Release priority
If (AFC), move to S-H11 with NO. In this S-H11,
It is determined whether the image magnification constant flag ONIMG is ONIMG = 1 (during image magnification constant) or not. If the image magnification is constant, YES proceeds to S-H4, and if NO, proceeds to S-H5. Further, in S-H4, it is determined whether or not the release permission flag SWREN is SWREN = 1 (release permission). If YES, the process proceeds to S-H5 with YES, and if NO, S-H5 is determined.
The processing of H12 to S-H14 is performed, and the timer interrupt processing ends.

In S-H5, it is determined whether or not the focusing lens group driving flag AFGO is AFGO = 1 (driving). If driving is in progress, YES is returned to S-H6, and if NO, If it moves to S-H10. In this S-H6, the AFSTOP processing shown in FIG. 47 is performed to stop the driving of the focusing lens group.
The flow shifts to S-H7, where the number of pulses dpx driven until the focusing lens group is stopped is counted from the output from the AF pulser 48, and the flow shifts to S-H8. In this S-H8,
AFDRVF Far direction drive flag of focusing lens group is A
Judge whether FDRVF = 1 (Far direction) or not, YES if it is Far direction
Then, the flow shifts to S-H15. If NO, the flow shifts to S-H9. And in S-H15, replace Pinf with Pinf-dpx, and in S-H9,
Replace f with Pinf + dpx and migrate to S-H10. This S-H1
In the case of 0, the driving of the zooming lens group is stopped by performing the ZOOM STOP processing of FIG. 48, and the flow shifts to the release processing of either Q in FIG. 29 or Q ′ in FIG.

[Release Process] (1) Release Process Q (FIG. 29) In the release process of FIG. 29, when the drive mode is the continuous release mode (drive C), the release process is performed while the release switch SWR is ON. The release processing is performed continuously without driving the single lens group and the zooming lens group.

When the flow shifts to Q in FIG. 29, first in S-Q1, release processing is performed to release the shutter of the camera, and
The flow shifts to Q2, and in S-Q2, the lens storage check process in FIG. 37 is performed, and the flow shifts to S-Q3. In this S-Q3, the drive switch
By operating the up switch SWUP or the down switch SWDOWN while operating SWDRIVE, the drive mode is changed to drive C, that is, continuous release mode (a mode in which release processing is continuously performed) or drive S, that is, single release mode (only once). (The mode in which the release process is performed), and shift to S-Q4. This S-Q4
In, it is determined whether the drive mode is drive S or not,
If the drive is C, the process proceeds to S-Q5 with NO, and if the drive is S, the process proceeds to S-Q6 with YES. Then, in S-Q5, it is determined whether or not the release switch SWR is ON. If the release switch SWR is ON, the process returns to S-Q1 with YES, loops until the release switch is OFF, and the release process is continuously performed. If so, move to S-Q7 with NO. Also in S-Q6, it is determined whether the release switch SWR is ON or not. If it is ON, return to S-Q2 with YES and OFF
It loops until it does, and if it is OFF, it shifts to S-Q7 with NO. In S-Q7, it is determined whether or not the photometry switch SWS is ON. If not, the process proceeds to L in FIG. 36 if NO, and to S-Q8 if YES if YES.

In S-L1 of FIG. 36, first, the timer interrupt is inhibited and the process proceeds to S-L2. In S-L2, the focusing lens group is stopped by performing the AFSTOP processing of FIG. Move to In this S-L3, the image magnification constant control flag ONIM
It is determined whether or not G is ONIMG = 1 (during image magnification constant control) .If not under control, the process proceeds to S-L7 with NO, and if under control with S, the process proceeds with YES.
-Move to L4. In S-L4, the zoom lens group is stopped by performing the ZOOMSTOP processing of FIG. 48, and the flow shifts to S-L5. In S-L5, the flag MAGIMG for starting the image magnification constant control is set to MAGIMG = 0, and the process proceeds to S-L6.
In L6, the image magnification constant control in-control flag ONIMG is set to ONIMG = 0 and S-
Move to L7. In this S-L7, the release permission flag SWREN
To S-L8 with SWREN = 0 (not allowed), and in S-L8, set the AF correction flag AFCORR to AFCORR = 0 and shift to S-L9, and in S-L9, perform the AF drive processing of FIG. 24. Then, the process shifts to S-L10, where a timer interrupt is permitted, and the process returns to S2 in FIG.

Further, when shifting from S-Q7 of FIG. 29 to S-Q8,
In this S-Q8, it is determined whether or not the auto-focusing flag AF is AF = 1 (during auto-focusing). If the auto-focusing is being performed, the process proceeds to S-Q9 with YES, and if NO, the S-Q11 is performed.
Move to In S-Q9, the image magnification constant control flag
It is determined whether ONIMG is ONIMG = 1 (during image magnification constant control),
If not under control, move to S-Q11 with NO; if under control, Y
Move to S-Q10 in ES. Then, in S-Q10, the timer interrupt is permitted, and the process returns to B in FIG. In S-Q11, the timer interrupt is permitted, and the process returns to S2 in FIG.

(2) Release Process Q '(FIG. 30) In the release process of FIG. 30, when the drive mode is the continuous release mode (drive C) and the focusing priority mode,
Regardless of whether the release switch SWR is ON or OFF, the release is permitted after performing re-AF or constant image magnification control. That is, in the processes of SQ'5 and SQ'6, the release process is performed by determining the AF mode, the focus priority mode, and the like.

In SQ'1 of FIG. 30, a release process is performed to release the shutter of the camera, and the flow shifts to SQ'2.
At '2, the lens storage check processing of FIG. 37 is performed, and the flow shifts to SQ'3. In this SQ´3, the drive switch SWDRIVE
Up switch SWUP or down switch while operating
By operating SWDOWN, the drive mode is switched to either drive C, that is, continuous release mode (a mode in which release processing is continuously performed) or drive S, that is, single release mode (a mode in which release processing is performed only once). Enter and move to SQ´4. In this SQ´4,
It is determined whether the drive mode is drive S or not.
Move to SQ´7 by ES.

In this SQ'7, the release switch SWR is
It is determined whether N is performed or not. If it is ON, YES and SQ'2
And loops until it is turned off.
Move to

In SQ'5, it is determined whether or not the AF mode switch (switch SWAF A / M) is input (ON). If the switch is ON, the process proceeds to SQ'6 with YES (AF mode). Then OFF
If so, move to SQ'8 with NO (manual). SQ´6
Then, it is determined whether the switch SWF S / C for focus / release priority switching is in focus priority (AFS) or not.
The process proceeds to Q'9, and if NO, the process proceeds to SQ'8.

Then, in SQ'8, the release switch SW
It is determined whether R is ON or not.
The process returns to Q'1 and loops until the camera is turned off, and the release process is continuously performed.

In this SQ'9, the release permission flag SWREN
Is set to SWREN = 0, and the flow shifts to SQ'10. In this SQ'10, it is determined whether or not the auto-focusing flag AF is AF = 1 (auto-focusing is in progress). Move to 13. In SQ'11, it is determined whether or not the image magnification constant control flag ONIMG is ONIMG = 1 (image magnification constant control is being performed). If YES, shift to SQ'13. Then, in SQ'12, a timer interrupt is permitted and the process returns to B in FIG. Also, SQ´13
Then, the timer interrupt is permitted, and the process returns to S2 in FIG.

As described above, in the case of the manual judgment based on the determination of S-T2 in FIG. 26, S-T15 to S-T18 and K in FIG. 35, H in FIG. 28, and Q in FIG.
Alternatively, the processing of Q ′ in FIG. 30 and the processing of L in FIG. 36 are performed. Also, this S-T2
If it is determined that the AF mode switch (switch SWAF A / M) is ON, the process shifts to S-T3 with YES (AF).

At S-T3, it is determined whether or not the mode is the focusing priority mode. If the mode is the focusing priority mode, the process shifts to S-T20. In this S-T20, the in-focus priority mode flag AFS is set to AF
The process shifts to S-T7 as S = 1 (focusing priority). On the other hand, if it is determined in S-T3 that the mode is not the focusing priority mode, the process proceeds to S-T4 with NO. In this S-T4, the in-focus priority mode flag AFS is set to AFS = 0.
Then, shift to S-T5. In this case, the release is possible at any time, so the release permission flag SWREN is set to SWREN = 0 with S-T5.
After that, shift to S-T6. This SWREN = 0
This is for performing the AF process again even if the focus is moved halfway after focusing. In other words, even though the camera is focused once in the focus priority mode, the in-focus state cannot always be detected, and it is necessary to perform the AF process again when the mode is changed to another mode.

When the zooming lens group is driven to perform zooming after focusing, there is a photographing lens that is out of focus. There is a varifocal lens as this photographing lens. In this vari-focal lens, when the zooming lens group is driven to perform zooming, the focus is out of focus. Therefore, it is necessary to correct the out-of-focus. Therefore, in the case of the focusing priority mode, the flag AFCORR is set to AFCORR = 1, and
You need to re-AF. However, since the focus priority mode is not set here, the focus shift correction flag AFCORR is set in the S-T6.
Set AFCORR = 0 and shift to S-T7.

In S-T7, it is determined whether or not the photometric switch SWS is ON. If it is ON, the process proceeds to S-T9 without confirming the AF bit with YES. -Move to T8 to check the AF bit. In this S-T8, it is determined whether or not the auto focus flag AF is AF = 1 (during auto focus).
To L, and if NO, to S-T9.

In this S-T9, the power zoom switch SWPZ
Is ON or not, and when OFF, N
If it is O, it moves to S-T21, and if it is ON, it moves to S-T10 with YES. In the S-T10, the power zoom driving flag PZM
ODE is set to PZMODE = 1 (during driving) and the process moves to S-T11.At S-T21, the power zoom driving flag PZMODE is set to PZMODE = 0 and S-T11 is set.
Move to T22. In S-T22, the ZOOMSTOP processing of FIG. 48 is performed, and the flow shifts to S-T23.

Here, irrespective of ON / OFF of the zoom switch SWPZ, there is a possibility that the zooming lens group is manually moved and is in the macro area. In addition, the driving control of the zooming lens group is performed regardless of whether the zooming lens group is in the zoom area or the macro area. The driving control method differs depending on the area. Therefore, in S-T11 and S-T23, it is determined whether or not the macro switch is ON.

In the determination of S-T23, the macro switch SWP
If ZC is ON, the process proceeds to S-T24 with YES, and if not, the process proceeds to S-T25 with NO. In S-T24, the macro area flag PZMACRO is set to PZMACRO = 1 (macro area), and in S-T25, the macro area flag PZMACRO is set to PZMACRO = 0 (zoom area), and the processing of H in FIG. 28 is performed.

Also, the macro switch is turned on by the judgment of S-T11.
If yes, move to S-T26 with YES, if not, NO
Move to S-T12. In S-T26, the previous macro area flag
It is determined whether or not PZMACRO is PZMACRO = 1 (macro area). If YES, the process proceeds to S-T30 with YES if YES, and shifts to S-T27 with NO if NO. In this S-T27, the near-end detection flag MNL by driving the zooming lens group in the macro area is set to MNL = 0, and the process proceeds to S-T28.In the S-T28, the Far end detection flag MFL by the driving of the zooming lens group in the macro area is set to MFL. = 0 and the process proceeds to S-T29.In S-T29, the macro area flag PZMACRO is set to PZMACRO = 1 (macro area).
Move to T30. Since the image magnification constant control cannot be performed in this macro area, the flag MAGIMG for starting the image magnification constant control is set to MAGIMG = 0 in S-T30, and the process proceeds to S-T31. In this S-T31, the image magnification constant control in-control flag ONIMG is ON.
It is determined whether or not IMG = 1 (under control).
The process shifts to L in 36 to stop the constant image magnification control, and if not in control, shifts to S-T32 with NO. In this S-T32,
A power zoom drive check in FIG. 33 is performed, and the flow shifts to H in FIG. 28 to perform a release process.

When shifting from S-T11 to S-T12, S-T1
Even in 2, judge whether the previous macro area flag PZMACRO is PZMACRO = 1 (macro area), and if it is a macro area, answer YES.
The flow shifts to S-T33, and if not in the macro area, the flow advances to S-T13 with NO. Then, in S-T33, the macro area flag PZMACRO is set to PZ
The process proceeds to K in FIG. 35 assuming that MACRO = 0 (outside the macro area, that is, the zoom area).

When shifting from S-T12 to S-T13, this S-T13
Then, it is determined whether or not the constant image magnification mode switch SWPZC is ON. And if it is not ON, the above-mentioned S-
The processing of T30 and S-T31 is performed, and the flow shifts to L in FIG. 36 to stop the constant image magnification control. If ON and YES, S-T14
In this S-T14, the image magnification constant control start flag M
AGIMG is set to MAGIMG = 1, the flow shifts to H in FIG. 28, and release processing is performed.

[Power zoom drive check (FIGS. 31 to 33)]
In the S-PD1 in FIG. 31, the power zoom mode switch SWPZ is
N to determine whether or not the power zoom drive enable flag PZMODE is PZMODE = 1 (drive enabled).
The process proceeds to S-PD7 if NO, and the process proceeds to S-PD7 with NO. In this S-PD7, it is determined whether the zooming lens group is driven by the power zoom mechanism, that is, whether the zooming lens group drive flag PZGO is PZGO = 1 (during driving), and if it is not driven, Proceed to the step next to the step where the power zoom drive check processing is performed,
If YES, the process proceeds to S-PD8 with YES. In S-PD8, the zooming lens group is stopped by performing the ZOOMSTOP processing of FIG. 48, and the flow shifts to S-PD17.

If it is determined in S-PD1 that the power zoom drive enable flag PZMODE is PZMODE = 1 (drive enabled), YES is returned to S.
-Move to PD2. In this S-PD2, it is determined whether the image magnification constant control flag ONIMG is ONIMG = 1 (during control), and if control is being performed, YES is determined next to the step in which the power zoom drive check processing is being performed. Move to step, if NO, proceed to S-PD3. In this S-PD3, it is determined whether the AF drive flag PZMGO by the power zoom mechanism in the macro area is PZMGO = 1 (during driving), and if driving is in progress, this power zoom driving check processing is performed with YES. The process proceeds to the next step, and if NO, the process proceeds to S-PD4.

In this S-PD4, the zooming lens group is
It is determined whether or not the zoom switch SWPZW that is driven in the e direction is ON. If the zoom switch SWPZW is ON, the process proceeds to S-PD5 with YES, and if NO, proceeds to S-PD9. In this S-PD9, it is determined whether or not the zoom switch SWPZT for driving the zooming lens group in the Tele direction is ON. If the zoom switch SWPZT is ON, the process proceeds to S-PD10 with YES, and if NO, S-PD7 Move to In S-PD5, it is determined whether or not the zooming lens group driving flag PZGO is PZGO = 1 (during driving). -Move to PD6. Similarly, in the S-PD10, the zooming lens group driving flag PZGO is set to PZGO = 1 (driving).
It is determined whether or not the operation is not driving, and if NO, the process proceeds to S-PD22. If the device is being driven, the process proceeds to S-PD11 with YES.

When the zoom switch SWPZW for driving the zooming lens group in the Wide direction is ON and the zooming lens group is driven, it is inconsistent that the zooming lens group is moving to the Tele side. Therefore, in S-PD6, it is determined whether or not the Tele side driving flag PZDRVT of the zooming lens group is PZDRVT = 1 (driving to the Tele side). In this case, the process proceeds to S-PD8 with YES, and performs a ZOOMSTOP process for stopping the zooming lens group.

Also, when the zoom switch SWPZT for driving the zooming lens group in the Tele direction is ON and the zooming lens group is driven, it is contradictory that the zooming lens group is moving to the Wide side. Therefore, the S-PD11 also determines whether the Tele-side driving flag PZDRVT of the zooming lens group is PZDRVT = 1 (driving to the Tele side), and if it is driving to the Wide side, it is inconsistent. Then, the process proceeds to S-PD8 with NO, and performs ZOOMSTOP processing for stopping the zooming lens group.

On the other hand, if there is no inconsistency unless the vehicle is being driven to the Tele side by the judgment of S-PD6, in this case, the operation proceeds to S-PD12 with NO, and the vehicle is being driven to the Wide side by judgment of S-PD11. If not
There is no conflict if driving to the Tele side, so in this case also
Move to S-PD12 with YES. In this S-PD12, PZ pulser 4
It is determined whether or not the interval of the pulse output from 9 is 100 msec or more, and if it is less than 100 msec, the process proceeds to the step next to the step in which the power zoom drive check process is performed if NO, and if it is 100 msec or more. Move to S-PD13 with YES.
In this S-PD13, the zooming lens group is stopped by performing the ZOOMSTOP processing of FIG. 48, and the flow shifts to S-PD14.
In this S-PD14, it is determined whether or not the Tele-side driving flag PZDRVT of the zooming lens group is PZDRVT = 1 (driving to the Tele side). The process proceeds to S-PD15 with NO when driving to the Wide side instead of the Tele side. And the S-PD15 has a zooming lens group Wi
The de-end detection flag WL is set to WL = 1, and the S-PD 16 sets the Tele end detection flag TL of the zooming lens group to TL = 1, and the process proceeds to S-PD17.

When the process proceeds from S-PD5, S-PD10 to S-PD22, the S-PD22 sets the AF correction flag AFCORR = 0 to AFCORR = 0, and proceeds to S-PD23. In this S-PD23, it is determined which of the power zoom drive switch, that is, the zoom switch SWPZT or SWPZW, is driven in either the Tele side or the Wide side, and if the zoom switch SWPZT is ON, S-PD23 is determined. The process proceeds to PD26, and if the zoom switch SWPZW is ON, the process proceeds to S-PD24.

In the S-PD24, the zooming lens group
It is determined whether the Wide end detection flag WL is WL = 1 or not, and the S-PD26 determines whether the Tele end detection flag TL of the zooming lens group is TL = 1. The process proceeds to the step next to the step in which the processing is being performed. In addition, if the determination in S-PD24 and S-PD26 is NO, the process shifts to S-PD25 and S-PD27, respectively.

In the S-PD 25, the zooming lens group is driven in the Wide direction by performing the PZWIDEGO processing shown in FIG.
In 27, the PZTELEGO process in FIG. 43 is performed to drive the zooming lens group in the Tele direction, and the flow shifts to S-PD28.

In this S-PD28, an auto focus flag is set.
Judge whether AF is AF = 1 (during auto focus),
If the auto focus is being performed, the process proceeds to S-PD29 with YES.
Then, in S-PD29, it is determined whether or not the focus / release priority switch SWF S / C is in focus priority (AFS), and if the focus is priority, the process proceeds to S-PD30 with YES. Also, this S-PD30
Then the release permission flag SWREN is SWREN = 1 (release is permitted)
Then, if release is permitted, the flow shifts to S-PD31. In addition, the S-PD 31 determines whether the photographing lens 3 is a vari-focal lens based on the information stored in the lens ROM 43.
To shift to S-PD32. On the other hand, NO in S-PD28 to S-PD31
If so, the process proceeds to the next step after the step in which the power zoom drive check processing is performed.

When shifting from S-PD31 to S-PD32, this S-PD
At 32, the focal length PZST at the start of driving the zooming lens group
ARTF is memorized and the process proceeds to S-PD33.The S-PD33 sets the release permission flag SWREN to SWREN = 0 (release not permitted) and returns to S-PD35.
The S-PD35 sets the AF correction flag AFCORR to AFCORR
As = 1, the process proceeds to the next step after the step in which the power zoom drive check process is performed.

Further, S-PD8 or S-PD15, S-PD16 to S-PD
When the process proceeds to S17, the S-PD 17 determines whether or not the auto focus flag AF is AF = 1 (during auto focus), and if the auto focus is being performed, the process proceeds to S-PD 18 with YES. Then, in S-PD18, it is determined whether the focus / release priority switch SWF S / C is in focus priority (AFS) or not. If the focus is priority, the process proceeds to S-PD19 with YES. Also, S-PD19
Then, it is determined whether the AF correction flag AFCORR is AFCORR = 1 or not, and YE
If S, shift to S-PD20. In S-PD20, the focal length PZENDF when driving of the zooming lens group is stopped is stored, and the flow shifts to R in FIG. 34 or S2 in FIG. On the other hand, S-PD17 to S-PD1
If the determination in 9 is NO, the process proceeds to the step following the step in which the power zoom drive check processing is performed.

In S-R1 of FIG. 34, the correction value PSTRT corresponding to the focal length PZSTART at the start of driving of the zooming lens group is read from the lens ROM 43, and the processing shifts to S-R2. In S-R2, driving of the zooming lens group is stopped. The correction value PEND corresponding to the focal length PZENDF at the time is read from the lens ROM 43, and the processing shifts to S-R3. This correction value is a shift amount of focusing due to driving of a zooming lens group when a vari-focal lens is used as a photographing lens. That is, the deviation amount (correction value) is, for example, as shown in Table 2 below.

[0191] Such a correction pulse (correction value n) can be changed by the lens design, and also changes depending on which of the reference value 0 is set to n _{1 to} n ₁₁ .

Then, when shifting from S-R2 to S-R3, in S-R3, the correction value PSTR when the zooming lens group is driven is set.
In order to see how much the difference between T and the correction value PEND when the zooming lens group was stopped after this drive, the subtraction result AFC obtained by subtracting the correction value PEND from the correction value PSTRT
Move to S-R4 for R. In this S-R4, the subtraction result A
It is determined whether or not the FCR is “0”. If the FCR is 0, the camera is in focus, so the process proceeds to S-R15 with YES, and if not 0, the camera is not focused, and the process proceeds to S-R5. Then, in S-R15, the release permission flag SWREN is set to SWREN = 1, and the process shifts to S-R16.In S-R16, the in-focus display is turned on, and the next step after the step in which the power zoom drive check processing is performed is performed. Transition.

If the subtraction result AFCR shifts to S-R5 instead of 0 in the judgment of S-R4, the focusing lens group driving amount of the subtraction result AFCR is set to dp in S-R5. In this case, since the drive amount is an absolute value, the process shifts to S-R6 as dp = | AFCR |. In S-R6, it is determined whether the subtraction result AFCR is positive or negative.
Move to 7. In S-R7, AFNEARGO processing is performed in FIG. 42 to drive the focusing lens group to the near side, and in S-R8, AFFARGO processing is performed in FIG.
Drive to ar end side and shift to S-R9.

In S-R9, it is determined whether or not the focusing lens group has been driven by the driving amount dp. If the driving has not been completed and the determination is NO, the process shifts to S-R10, and if the determination is YES, the process proceeds to S-R10. Move to S-R12. Then, in S-R10, it is determined whether or not the interval between pulses output from the AF pulser 48 is equal to or longer than 100 msec. If it is shorter than 100 msec, the process returns to S-R9 with NO and loops. If the pulse interval is equal to or longer than 100 msec in S-R10, the process shifts to S-R11. In S-R11, the end point processing shown in FIG. 25 is performed, and in S-R12, the AF drive stop processing shown in FIG. 24 is performed, and the flow shifts to S-R13.

In this S-R13, the N of the focusing lens group
It is determined whether the ear end detection flag NL is NL = 1 or not.
-Move to R14. In this S-R14, it is determined whether or not the Far end flag FL of the focusing lens group is FL = 1.
-Move to R15. Then, in S-R15, the release permission flag SWREN is set to SWREN = 1, and the flow shifts to S-R16. In S-R16, the in-focus display is turned on, and the flow shifts to the step next to the step in which the power zoom drive check processing is performed. If YES in S-R13 and S-R14, the flow shifts to the next step in which the power zoom drive check processing is performed.

[Lens Storage Check (FIG. 37)] S-LC1 in FIG. 37
Then, the main SW (switch), that is, the lock switch SWLOCK is ON
It is determined whether or not the power zoom drive check process is being performed. If NO, the timer interrupt is inhibited by S-LC2 and the process proceeds to S-LC3. In this S-LC3, Figure 47
AFSTOP processing is performed to stop the focusing lens group and shift to S-LC4, where the ZO shown in FIG.
By performing the OMSTOP process, the zooming lens group is stopped, and the process proceeds to S-LC5. The S-LC5 determines whether the AF mode switch (switch SWAF A / M) is ON,
If it is AF, the process proceeds to S-LC6 with YES, and if NO (manual), the process proceeds to S-LC14. Also, in S-LC6, it is determined whether or not the focusing lens group is of a storable type from information stored in the lens ROM 43 in advance, and if storable, the process proceeds to S-LC7 with YES. And if NO
Move to S-LC14.

In this S-LC14, it is determined whether or not the power zoom switch SWPZ is ON. If the switch is ON and YES, the flow shifts to S-LC15. In S-LC15, lens RO
It is determined whether or not the zooming lens group is of a storable type based on information stored in advance in M43, and if storable, the process advances to S-LC11 with YES. On the other hand, if the power zoom switch SWPZ is OFF and NO in the judgment of S-LC14, or if the zooming lens group is not of the type that can be stored in S-LC15 and is NO, from FIG. The process proceeds to S-U18, where the power hold is released at S-U18, and the processing ends.

When shifting from S-LC6 to S-LC7, in S-LC7, the focusing lens group is driven in the direction to be retracted, and then shifting to S-LC8. In S-LC8, the focusing lens group drive flag is set. Set AFGO to AFGO = 1 and transfer to S-LC9. This SL
In C9, it is determined whether or not the power zoom switch SWPZ is ON, and if it is ON and YES, the process shifts to S-LC10. In this S-LC10, it is determined from the information stored in the lens ROM 43 in advance whether or not the zooming lens group is of a type that can be stored.
Move to 1. In this S-LC11, the zooming lens group is driven in the rewinding direction and the process proceeds to S-LC12.In S-LC12, the zooming lens group driving flag PZGO is set to PZGO = 1 and S-LC13 is set.
Move to

On the other hand, if the power zoom switch SWPZ is turned off and the determination is NO in S-LC9, or if the zooming lens group cannot be stored in the S-LC10 and is NO, the S-LC10 Move to LC13. And S-LC12 or S-LC
9, When shifting from S-LC10 to S-LC13, lens RO
The maximum storage time timer of the lens stored in advance in M43 is operated, and the flow shifts to U in FIG.

In FIG. 38, it is determined in S-U1 whether the focusing lens group driving flag AFGO is AFGO = 1 (driving), and if not driving, the process proceeds to S-U7 with NO, and If YES, the process proceeds to S-U2 with YES. In this S-U2, it is determined whether the AF mode switch (switch SWAF A / M) is ON,
If it is ON and AF, YES moves to S-U3, and if NO (manual), moves to S-U4. In S-U3, it is determined whether or not the pulse interval output from the AF pulser is 100 msec or more. If the pulse interval is less than 100 msec, shift to S-U5 with NO, and if 100 msec or longer, shift to S-U4 with YES. .

When shifting from S-U3 to S-U5, the pulse count value AFP of the number of pulses output from the AF pulser is counted, and the process shifts to S-U6.
Maximum value A that AFP can drive the focusing lens group to the maximum
Judge whether it is smaller than FPmax, and if smaller, YES with S-U7
If it is larger, move to S-U4 with NO. And S-
At U4, the focusing lens group is stopped by performing the AFSTOP processing of FIG. 47, and the flow shifts to S-U7. This is because if the pulse output from the AF pulser 48 during the driving of the focusing lens group continues to be output even if it exceeds the maximum value AFPmax,
In this case, the battery is stopped because the battery is greatly consumed.

Then, in S-U7, it is determined whether or not the zooming lens group driving flag PZGO = 1 (during driving). If not driving, the process shifts to S-U13 with NO, and if driving, YES-S-
Move to U8. In S-U8, it is determined whether or not the zoom switch SWPZ is ON. If it is ON, the process proceeds to S-U9 with YES, and if NO, the process proceeds to S-U10. In S-U9, it is determined whether or not the pulse interval output from the PZ pulser 49 is equal to or longer than 100 msec.
If it is 0 ms or more, the flow shifts to S-U10.

When shifting from S-U9 to S-U11, the pulse count value PZP of the number of pulses output from the PZ pulser
The pulse count value PZP is the maximum value P at which the zooming lens group can be driven at the maximum in the S-U12.
Judge whether it is smaller than ZPmax, and if it is smaller, YES and S-U1
Move to 3, if larger, move to S-U10 with NO. And
In S-U10, the zooming lens group is stopped by performing the ZOOMSTOP processing of FIG. 48, and the process shifts to S-U13. This is P
If the pulse output from the Z pulser 49 while driving the zooming lens group exceeds the maximum value PZPmax, the pulse continues to be output,
In this case, the battery is stopped because the battery is greatly consumed.

In S-U13, it is determined whether the focusing lens group driving flag AFGO is AFGO = 1 or not. If not driving, the process proceeds to S-U14 with NO. In S-U14, it is determined whether or not the zooming lens group driving flag PZGO = 1 or not. If the driving is not in progress, the process proceeds to S-U18 with NO. And this S-U18
To release the power hold and finish.

In the embodiment of the present invention described above, the focusing lens group and the like are
The AF end point processing subroutine (FIG. 25) executed when the far end or the near end is reached, and the AF drive stop subroutine (FIG. 24) executed when the required driving amount of the focusing lens group or the like is completed. In), an error between the position information of the photographing lens and the reference position information is sometimes eliminated at the time of control.

That is, in the AF end point processing subroutine, in S-AFE4 to S-AFE6 or S-AFE12 to S-AFE14, Plmt is calculated from Pinf and dPX, and Plmt <ε as the condition of the allowable range. Judgment is being performed.

If the result of the determination at S-AFE6 or S-AFE14 is YES and within the allowable range, S-AFE11 or S-AFE11
In AFE19, Pinf, which is the positional information of the focusing lens group, is set to Ne, where the focusing lens group is located.
Since it is changed to Pnear or 0 as the reference position information of the ar end or the Far end, the error of Pinf is eliminated.

If the result of determination in S-AFE6 or S-AFE14 is NO and the result of determination is out of the permissible range, S-AFE7
Alternatively, the focusing lens group is set to Nea in S-AFE15.
Drive toward the r end or Far end, and after stopping at S-AFE9, S-AFE10 or S-AFE17, S-AFE18, change Pinf which is the positional information of the focusing lens group in the same manner as above, and Pi
The error of nf is eliminated.

Further, in the AF drive stop subroutine, the S-AFS4 or S-AFS11 calculates a new Pinf from the previous Pinf and dPX, and sets Pinf <Pnear as a condition of the allowable range of the new Pinf. Or Pinf> 0 is S-AFS
5 or S-AFS12.

When it is determined that the S-AFS5 or S-AFS12 is out of the allowable range, the S-AFS6 or S-AFS13 is determined in the same manner as in the case of the out of the allowable range.
Focus lens group near end or Far
After driving toward the end and stopping, S-AFS10 or S-AFS
At 17, Pinf which is the positional information of the focusing lens group is changed, and the error of Pinf is eliminated.

If the focusing lens group is being driven and YES is determined in S-U13, or if the zooming lens group is being driven and YES is determined in S-U14, S-U15
Move to Then, in S-U15, it is determined whether or not the storage time has ended, and if not, the process returns to S-U19 with NO. Then, in S-U19, it is determined whether or not the main switch, that is, the lock switch SWLOCK is ON. If OFF, the process returns to S-U1 to loop with NO, and if ON, YES to K in FIG. Move to

On the other hand, when shifting from S-U15 to S-U16, S-U1
In FIG. 47, the focusing lens group is stopped by performing the AFSTOP processing of FIG. 47, and the process shifts to S-U17.
The zoom lens group is stopped by performing the ZOOMSTOP processing of (1), and the process shifts to S-U18, where the power hold is released and the processing ends.

In the embodiment of the present invention described above, as described above, the focusing lens group, etc.
The AF end point processing subroutine (FIG. 25) executed when the far end or the near end is reached, and the AF drive stop subroutine (FIG. 24) executed when the required driving amount of the focusing lens group or the like is completed. In), an error between the position information of the photographing lens and the reference position information is sometimes eliminated at the time of control.

In other words, in the AF end point processing subroutine, in S-AFE4 to S-AFE6 or S-AFE12 to S-AFE14, Plmt is calculated from Pinf and dPX, and Plmt <ε as an allowable range condition. Judgment is being performed.

If the result of the determination in S-AFE6 or S-AFE14 is YES and within the allowable range, S-AFE11 or S-AFE11
In AFE19, Pinf, which is the positional information of the focusing lens group, is set to Ne, where the focusing lens group is located.
Since it is changed to Pnear or 0 as the reference position information of the ar end or the Far end, the error of Pinf is eliminated.

If the result of determination in S-AFE6 or S-AFE14 is NO and the result of determination is out of the permissible range, S-AFE7
Alternatively, the focusing lens group is set to Nea in S-AFE15.
Drive toward the r end or Far end, and after stopping at S-AFE9, S-AFE10 or S-AFE17, S-AFE18, change Pinf which is the positional information of the focusing lens group in the same manner as above, and Pi
The error of nf is eliminated.

Further, in the AF drive stop subroutine, the S-AFS4 or S-AFS11 calculates a new Pinf from the Pinf thus far and dPX, and Pin <Pnear as a condition of the allowable range of the new Pinf. Or Pinf> 0 is S-AFS
5 or S-AFS12.

When it is determined that the value of S-AFS5 or S-AFS12 is out of the allowable range, the S-AFS6 or S-AFS13 is determined in the same manner as in the case of out of the allowable range.
Focus lens group near end or Far
After driving toward the end and stopping, S-AFS10 or S-AFS
At 17, Pinf which is the positional information of the focusing lens group is changed, and the error of Pinf is eliminated.

In the embodiment described above, an example is shown in which the zoom position is detected by the zoom code plate, but the present invention is not necessarily limited to this. For example, FIG.
As shown in (1), a reflection plate 64 for position detection extending in the circumferential direction may be fixed to the outer periphery of the base of the cam cylinder 29, and a reflection type photodetector 65 may be arranged to face the reflection plate 64. The photodetector 65 has a light emitting element that emits light toward the reflection plate 64 and a light receiving element that receives light reflected by the reflection plate. Moreover, as the reflection plate 64, for example, a density change type in which the density changes from one end to the other end as shown in FIG.
A bar code plate as shown in FIG. 50 (B) may be used.

As shown in FIGS. 51 and 52, the cam cylinder 29
An electrode plate 66 fixed circumferentially to the base of the
It is also possible to provide a variable-capacitance-type zoom position detecting means comprising an electrode plate 67 attached to the fixed frame 27 side in such a manner as to oppose the above, so as to detect the zoom position from a change in capacitance.

Further, as shown in FIG. 53, a variable resistance type zoom position comprising a resistance plate 68 fixed to the base of the cam barrel 29 in the circumferential direction and a brush 69 elastically contacting the resistance plate 68. Detecting means may be provided to detect the zoom position from a change in resistance change of the variable resistor.

FIG. 54 conceptually shows the relationship between the power zoom mechanism and the pulsar used in the present invention. Here, it is assumed that the pulsar also serves as a zoom code plate and a PZ pulsar, but a zoom code plate may be provided in addition to the pulsar, or a pulsar instead of the zoom code plate and a PZ pulsar are used in combination. You can also.

In FIG. 54, a gear 70 is provided at the base of the cam cylinder 29, and the PZ motor M2 is interlocked with the gear 70 via the reduction gear mechanism 71. This reduction gear mechanism 71 includes a gear 70
A gear 72 meshing with the gear 72, a pinion 73 meshing with the gear 72,
It has an idle shaft 74 to which the pinion 73 is fixed, and a gear 75 fixed to the idle shaft 74. A transmission type PZ is provided between the idle shaft 74 and a lens barrel (not shown).
Pulsar 49 is interposed. The PZ pulsar 49 has a slit plate 76 fixed to the idle shaft 74 and a photodetector 77 arranged on the periphery of the slit plate 76. As shown in FIG. 55, a large number of slits 76a extending in the radial direction are formed in the peripheral portion of the slit plate 76 at a constant pitch in the circumferential direction. Further, the photodetector 77 is disposed at a position where the light emitting element 77a and the light receiving element 77b sandwich the peripheral edge of the slit plate 76. Incidentally, the arrangement of such a PZ motor M2 and the reduction gear mechanism 71 is not limited to the illustrated position, but may be appropriately arranged in consideration of other components and the like.

As the PZ pulser 49, a reflection type may be used in addition to a transmission type. Fig. 56, Fig. 5
7 shows an example of a reflection type pulser.
In this example, a reflection plate 78 is fixed to the idle shaft 74, reflection surfaces 78a extending in the radial direction are provided on the reflection plate 78 at equal pitches in the circumferential direction, and the photodetector 52 is mounted on the reflection plate 78.
In this example, a reflection type photodetector 79 similar to the above is opposed.

FIGS. 58 and 59 show another example of the reflection type pulser. In this example, a polyhedral reflector 80 whose peripheral surface is a reflective surface is fixed to the idle shaft 74, and a reflective photodetector 81 similar to the photodetector 52 is opposed to the peripheral surface of the polyhedral reflector 80. It is.

[0226]

As described above, according to the first aspect of the present invention, the comparing means determines that the difference between the reference position information of the taking lens and the position information of the taking lens is within a predetermined allowable range. In this case, the control unit forcibly changes the position information of the photographing lens (information about the position recognized by the control device) to the reference position information (information corresponding to the actual position of the photographing lens). If the information includes an error associated with the movement up to the reference position information, the error accumulated up to that point is eliminated, and accurate lens drive control can always be maintained.

According to the second aspect of the present invention, when the comparing means determines that the difference between the reference position information of the photographing lens and the photographing lens position information is outside a predetermined allowable range, the control means Driving the photographing lens toward one of the first and second positions in the driving means, and forcibly correcting the error at the driving end point position of the first or second position. Since this is eliminated, accurate lens drive control can always be maintained.

[Brief description of the drawings]

FIG. 1 is a control block circuit diagram of a camera image magnification control device according to the present invention.

FIG. 2 is a circuit diagram showing in more detail a portion on the camera body side in the image magnification control device of the camera shown in FIG. 1;

FIG. 3 is a circuit diagram showing in more detail a portion on an imaging lens side in the image magnification control device of the camera shown in FIG. 1;

FIG. 4 is a schematic explanatory view showing an example of a movable mechanism of a zooming lens group of the photographing lens shown in FIG.

FIG. 5 is an explanatory diagram of the zoom code plate of FIG. 4;

FIG. 6 is a schematic explanatory diagram showing a relationship between a subject and an image by a photographing lens.

FIG. 7 is a schematic explanatory view for explaining the principle of constant image magnification according to the present invention.

8A is a three-dimensional change coordinate diagram showing a change in the focal position of the focusing lens group due to zooming, and FIG.
FIG. 4 is an explanatory diagram for explaining the meaning of coordinates (a).

FIG. 9A is a three-dimensional change coordinate diagram showing a change in the defocus amount of the focusing lens group due to zooming;
(B) is an explanatory diagram for explaining the meaning of the coordinates of (a).

FIG. 10 is an explanatory diagram showing a relationship between a zoom position of a zooming lens group and a K value.

FIG. 11 is an explanatory diagram showing a relationship between a zoom position of a zooming lens group and a focal length of a focusing lens group.

12 is an explanatory diagram of a correction curve obtained by correcting the relationship between the zoom position and the K value of the zooming lens group shown in FIG.

13 is an explanatory diagram of a correction curve obtained by correcting the relationship between the zoom position of the zooming lens unit and the focal length of the focusing lens unit in FIG.

FIG. 14 is a flowchart for explaining the operation of the image magnification control device for a camera according to the present invention.

FIG. 15 is a flowchart following J1.

FIG. 16 is a flowchart following B.

FIG. 17 is a flowchart following J2.

FIG. 18 is a flowchart following N.

FIG. 19 is a flowchart following D.

FIG. 20 is a flowchart following E.

FIG. 21 is a flowchart following P.

FIG. 22 is a flowchart following I.

FIG. 23 is a flowchart following M.

FIG. 24 is a flowchart illustrating a subroutine for stopping AF driving.

FIG. 25 is a flowchart showing a subroutine of AF end point processing.

FIG. 26 is a flowchart showing a subroutine of a timer interrupt process.

FIG. 27 is a flowchart following J3.

FIG. 28 is a flowchart following H.

FIG. 29 is a flowchart following Q.

FIG. 30 is a flowchart following Q ';

FIG. 31 is a flowchart illustrating a subroutine of a power zoom drive check.

FIG. 32 is a flowchart following J4.

FIG. 33 is a flowchart following J5 and J6.

FIG. 34 is a flowchart following R.

FIG. 35 is a flowchart following K.

FIG. 36 is a flowchart following L.

FIG. 37 is a flowchart showing a subroutine of a lens storage check.

FIG. 38 is a flowchart following U.

FIG. 39 is a flowchart following J7.

FIG. 40 is a flowchart showing a subroutine for initialization.

FIG. 41 is a flowchart showing a subroutine of AFFARGO.

FIG. 42 is a flowchart showing a subroutine of AFNEARGO.

FIG. 43 is a flowchart showing a subroutine of PZTELEGO.

FIG. 44 is a flowchart showing a subroutine of PZWIDEGO.

FIG. 45 is a flowchart showing a subroutine of MCRFARGO.

FIG. 46 is a flowchart showing a subroutine of MCRNEARGO.

FIG. 47 is a flowchart showing a subroutine of AFSTOP.

FIG. 48 is a flowchart showing a subroutine of ZOOMSTOP.

FIG. 49 is an explanatory diagram showing another example of the zoom position detecting means for detecting the zoom position of the zooming lens group.

50 is a development view of the reflection plate shown in FIG. 49.

FIG. 51 is an explanatory diagram showing still another example of the zoom position detecting means for detecting the zoom position of the zooming lens group.

FIG. 52 is an explanatory diagram of the electrode plate of FIG. 51.

FIG. 53 is an explanatory diagram showing still another example of the zoom position detecting means for detecting the zoom position of the zooming lens group.

FIG. 54 is an explanatory diagram conceptually showing an example of a power zoom mechanism of a photographing lens.

FIG. 55 is a front view of the slit plate of FIG. 54.

FIG. 56 is a front view showing another example of the PZ pulser shown in FIG. 54.

FIG. 57 is an explanatory diagram of the reflection plate of FIG. 56.

FIG. 58 is an explanatory view showing still another example of the PZ pulsar shown in FIG. 54.

FIG. 59 is a front view of the polyhedral reflector shown in FIG. 58.

[Explanation of symbols]

 M1 AF motor M2 PZ motor 3 Shooting lens 4 Camera control circuit 5 Lens control circuit 48 AF pulser 49 PZ pulser

────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-63-208012 (JP, A) JP-A-62-102212 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G02B 7/08

Claims (2)

(57) [Claims] 1. A photographing lens movable between a first position and a second position, driving means for driving the photographing lens, and a movement detection signal output each time the photographing lens moves by a predetermined amount. Detection signal generation means; counting means for counting the number of movement detection signals; reference position information corresponding to one of the first and second positions of the photographing lens; and a count value of the counting means. Lens position information detecting means for generating position information of the photographing lens on the basis of: lens movement detecting means for detecting a moving state of the photographing lens based on an output interval of the movement detecting signal; Comparing means for comparing the reference position information with the position information of the taking lens on condition that the means detects the stop of the taking lens; and Control means for forcibly changing the position information of the taking lens to the reference position information when it is determined that the difference from the position information of the taking lens is within a predetermined allowable range. Drive control device for lens. 2. The drive control device for a photographing lens according to claim 1, wherein the control unit determines that a difference between the reference position information and the photographing lens position information of the photographing lens is outside a predetermined allowable range. A driving control unit for driving the photographing lens in one of the first and second positions.