JP3303254B2 - Driving device for zoom 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 driving apparatus for a zoom lens, and more particularly to a driving apparatus for a zoom lens of a two-lens 3D camera used for photographing a stereoscopic image for reproducing an image which gives an observer a stereoscopic effect. About.

[0002]

2. Description of the Related Art Conventionally, a technique has been proposed in which a subject is photographed by two left and right cameras corresponding to both eyes to obtain a stereoscopic image that allows an observer to feel a stereoscopic effect. FIG. 9 shows a configuration of a driving device for a zoom lens of a conventional two-lens 3D camera. The drive device for the zoom lens shown in FIG. 1 controls two video cameras 1 and 2 equivalent to each other on the left and right sides by the microprocessing device 3, and mainly drives the variable power lens 12 of the left zoom lens 10. A first drive unit 14 that performs zooming, a first position detector 16 that detects the zoom position of the left zoom lens 10 (for example, a value indicating the position of the variable power lens 12), and a change of the right zoom lens 20. A second drive unit 24 for driving the magnification lens 22, a second position detector 26 for detecting the right zoom position, and a microprocessing unit (MPU) for synchronously controlling the first and second drive units 34, and a zoom switch 36 for performing a tele / wide switching operation. Note that the left and right can be interchanged.

When the contact piece of the zoom switch 36 comes into contact with the tele side (or the wide side), a control signal for operating the motor drive circuits 64 and 74 is output from the MPU 34 at the same time. Then, the motor drive circuits 64 and 74 respectively drive the motors 62 and 72 based on this control signal to move the variable power lenses 12 and 22 back and forth in the optical axis direction.
The positions of the variable power lenses 12 and 22 are detected by the first and second position detectors 16 and 26, respectively.
The MPU 34 has been notified.

On the other hand, for focus adjustment, motor drive circuits 67 and 77 are controlled based on a signal from an auto focus (AF) means (not shown), and the focus lenses 43 and 53 are moved forward and backward via motors 66 and 76, respectively. It is moved and the focus is adjusted. The positions of the focus lenses 43 and 53 are automatically adjusted so that the focus is not deviated with the movement of the variable power lenses 12 and 22, respectively. And the sensors 68, 7
8, the positions of the focus lenses 43 and 53 are detected, and are notified to the MPU 34.

The subject light that has passed through the left zoom lens 10 forms an image on the light receiving surface of the CCD 45, and is converted into R, G, and B signal charges corresponding to the light intensity. R, G,
The B charge is read by a read pulse applied from the CCD drive circuit 46, separated by a CDS (correlated double sampling) circuit 47, subjected to known signal processing, and output as an image signal. A timing signal from a reference signal generator (SSG) 49 is added to each of the CCD drive circuit 46, CDS circuit 47, and signal processing circuit 48, and the circuits are synchronized. The same applies to the video camera on the right side.

[0006]

However, in the above-mentioned conventional zoom lens driving device, even if a left and right zoom lens system is prepared, the position of the variable power lens or the amount of movement of the lens with respect to the amount of movement may vary due to individual differences between the lenses. Since the focal lengths are not the same, there is a problem that an error occurs in the left and right zoom magnifications.

Further, one zoom lens is connected to the master side,
With the other zoom lens as the slave side, the master side zoom lens is driven by operating the zoom switch,
Even when the slave-side zoom lens is configured to follow and drive based on the error between the zoom positions of both, the non-linearity of the detector that detects the left and right zoom positions causes the left and right focal length errors to vary depending on the zoom position. There is a problem that the degree changes greatly.

[0008] If there is a difference between the left and right photographing magnifications, the resulting image is very difficult to see, giving the viewer fatigue and making it difficult to use for a long time. The present invention has been made in view of such circumstances, and when changing the focal lengths of the zoom lenses of the two right and left video cameras, a drive device for a zoom lens that can match the left and right focal lengths with high accuracy. The purpose is to provide.

[0009]

In order to achieve the above object, the present invention provides a zoom lens driving apparatus for driving first and second zoom lenses arranged in a pair on the left and right for taking a stereoscopic image. A zoom switch for instructing zooming in a tele direction or a wide direction, first driving means for driving the first zoom lens in a tele direction or a wide direction by operating the zoom switch, and the first and the second, respectively. First and second detecting means for detecting a zoom position indicating a photographic magnification of a zoom lens, digitizing the detected zoom position data, and outputting the digitalized zoom position data; and a zoom position output from the first and second detecting means. Inputting zoom position data of at least one of the data, storing in advance an output value corresponding to a digital value of the input signal,
And at least one look-up table that corrects the zoom position detection characteristics of the second detection means so that they match each other, and the zoom position data detected by the first and second detection means and corrected by the look-up table. And a second driving unit that drives the second zoom lens so that a photographing magnification of the second zoom lens matches a photographing magnification of the first zoom lens. I have.

According to the present invention, of the two left and right zoom lenses, the first zoom lens issues a zooming instruction in the tele direction or the wide direction by operating the zoom switch, and the second zoom lens performs zooming. The first zoom lens is driven to follow based on the position error. At this time, in consideration of the variation and non-linearity of the output characteristics of the position detectors that detect the left and right zoom positions, at least one of the zoom position data is corrected using a look-up table, and the output characteristics of both are made uniform. So
The left and right focal lengths can be matched with high accuracy.

[0011] Further, the present invention provides
First and second pairs of left and right arranged for capturing a stereoscopic image
And a zoom switch for instructing zooming of the first and second zoom lenses, and the first and second zoom lenses in response to operation of the zoom switches. And first and second driving means for driving the first and second driving means, respectively, detecting a zoom position indicating a photographing magnification of the first and second zoom lenses, digitizing the detected zoom position data, and outputting the digitized data. And at least one of the zoom position data output from the first and second detection means, and an output value corresponding to a digital value of the input signal is stored in advance. And at least one look-up table that corrects the zoom position detection characteristics of the first and second detection means so that they match each other. Is detected by the detecting means, wherein calculating the error of the corrected zoom position in the look-up table, said first and second to reduce the said error
Speed control means for controlling at least one of the zoom speeds of the first and second zoom lenses driven by the driving means.

According to the present invention, zooming is commanded for the first and second zoom lenses by one common zoom switch. When zooming is instructed by the zoom switch, the first and second driving means are driven by the first and second driving means.
Are simultaneously driven. For each zoom lens, the first and second detecting means detect a zoom position indicating a shooting magnification, and based on the detection, the first and second detecting means control the speed control means to reduce an error between both zoom positions. The zoom speed of at least one of the two zoom lenses is adjusted. At this time, in consideration of the variation and non-linearity of the output characteristics of the position detectors that detect the left and right zoom positions, at least one of the zoom position data is corrected by a look-up table, and the output characteristics of both are made uniform. Therefore, the left and right focal lengths can be matched with high accuracy. In addition, since the left and right zoom lenses are simultaneously driven by the operation of the zoom switch, errors in the zoom position at the beginning of the start can be reduced.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a zoom lens driving device according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a configuration of a driving device of a 3D zoom lens to which the present invention is applied. 9, the same or similar members as those of the conventional zoom lens driving device shown in FIG. 9 are denoted by the same reference numerals. The driving device for the 3D zoom lens shown in FIG. 1 mainly includes a first driving unit 14 and a second driving unit 24 that respectively drive the variable power lenses 12 and 22 of the left and right zoom lenses 10 and 20; A first position detector 16 and a second position detector 26 for detecting the positions of the variable power lenses 12 and 22, respectively,
And AD converters 17 and 27 for digitizing the position detection signals detected by the second position detectors 16 and 26, respectively.
And a lookup table (LUT) in which zoom position correction data corresponding to the digital value of the input signal is stored in advance, and the zoom position correction data is read out according to the digital value of the signal applied from the AD converters 17 and 27. 1
8, 28, and a comparator 30 that detects an error between the two from the zoom position data corrected by the LUTs 18, 28, and drives the second drive unit on the right side based on the detected error. It comprises a microprocessing unit (MPU) 34 for controlling, a zoom switch 36 for operating a tele / wide zooming command, and the like. Note that the left and right can be interchanged.

As the left and right video cameras, video cameras having the same specifications are used. That is,
A lens unit including the fixed lens 42, the variable power lens 12, and the focus lens 43, which constitute the left video camera, the CCD 45, the CCD driving circuit (driver) 46, and the CD
Each member of the imaging unit including the S circuit 47, the signal processing circuit 48, the reference signal generator (SSG) 49, etc., the fixed lens 52, the variable power lens 22,
And a lens unit including the focus lens 53 and the CCD 5
5, CCD drive circuit (driver) 56, CDS circuit 5
7. Signal processing circuit 58 and reference signal generator (SSG)
The same members as those of the image pickup unit including 59 are used.

The subject light that has passed through the lens portion of the left video camera is imaged on the light receiving surface of the CCD 45 and is converted into R, G, and B signal charges corresponding to the light intensity. R,
The G and B charges are read by a read pulse applied from the CCD drive circuit 46, separated by the CDS circuit 47, subjected to known signal processing, and output as image signals. The CCD driving circuit 46,
The CDS circuit 47 and the signal processing circuit 48 include an SSG 49
From each other, and the respective circuits are synchronized. The same applies to the video camera on the right side.

The first drive section 14 on the left side includes a motor 62 for driving the variable power lens 12, and a motor drive circuit (motor driver) 64 for operating the motor 62. The motor driver 64 includes the MPU3
4 is controlled by a control signal. That is, when a zooming command is issued in the tele direction by the zoom switch 36, a control signal of a tele signal = high (H) and a wide signal = low (L) is sent from the MPU 34 to the motor driver 64.
When a zooming command is issued in the wide direction by the zoom switch 36, the MPU 34 outputs a tele signal =
The control signal of L, wide signal = H is the motor driver 6
4 is output. When the zooming command by the zoom switch 36 is released, the tele signal = L and the wide signal =
An L control signal is output to the motor driver 64.
The motor driver 64 drives the motor 62 based on the control signal.

The variable magnification lens 12 is driven back and forth by the motor 62 to change the photographing magnification of the zoom lens 10. The zoom position indicating the photographing magnification of the zoom lens 10 is determined by the first position detector 16
Is detected by The first position detector 16 is composed of, for example, a potentiometer, and detects the position of the variable power lens 12 between the telephoto end and the wide end as a zoom position voltage Va.

The zoom position voltage Va is digitized in the range of 0 to 255 by the AD converter 17 and is corrected by the LUT 18. The LUT 18 is an input / output conversion table in which an output value corresponding to a digital value of an input signal is stored in advance, and a conversion function for matching output characteristics of the first position detector 16 with a reference zoom function serving as a reference. have.

The zoom position data corrected by the LUT 18 is added to the comparator 30 and is also notified to the MPU 34. On the other hand, the right zoom lens 20 also includes a motor 72 for driving the variable power lens 22 in the front-rear direction and a motor drive circuit (motor driver) 74 for operating the motor 72, as in the case of the left zoom lens described above. A second drive unit 24 is provided, and the position of the variable power lens 22 is detected by a second position detector 26. The zoom position voltage V detected by the second position detector 26
b is digitized in the range of 0 to 255 by the AD converter 27 and then corrected by the LUT 28.
The LUT 28 has a conversion function to make the output characteristic of the second position detector 26 coincide with the reference zoom function described above.

The zoom position data corrected by the LUT 28 is added to the comparator 30 and is also notified to the MPU 34. The details of the LUTs 18 and 28 will be described later. The configuration on the right side differs from the configuration on the left side in that the second drive unit 24 is drive-controlled based on the error between the left and right zoom positions detected by the comparator 30.
The second drive unit 24 drives the variable power lens 22 so as to reduce the error of the zoom position caused by the movement of the left zoom lens driven in advance by the operation of the zoom switch 36. . In other words,
With the left zoom lens as the master side and the right zoom lens as the slave side, the movement of the master-side zoom lens 12 follows the movement of the slave-side zoom lens 22 to minimize the error in the left and right shooting magnifications. I have.

As for the focus adjustment, a motor 66 for driving the left focus lens 43 in the front-rear direction is used.
And a motor drive circuit (motor driver) 67 for operating the motor 66, and a sensor 68 for detecting the position of the focus lens 43. The motor driver is provided based on auto-focus (AF) means (not shown). 67 is controlled so that the focus lens 43 is driven to focus, and the focus lens 43 is driven so as to obtain a focused state in accordance with the position of the variable power lens 12. The sensor 68 detects the position of the focus lens 43 and notifies the MPU 34 as focus position data.

As for the focus adjustment on the right side, similarly to the left side, the motor 7 for driving the focus lens 53 is used.
6, a motor drive circuit (motor driver) 77 for operating the motor 76, and a sensor 78 for detecting the position of the focus lens 53, based on a signal from an auto focus (AF) unit (not shown). As a result, the focus lens 53 is driven to focus, and a focused state is obtained in accordance with the position of the variable power lens 22. Then, the position of the focus lens 53 is detected by the sensor 78 and notified to the MPU 34.

FIG. 2 qualitatively shows the output characteristics of the first and second position detectors. As shown in the figure, the first and second position detectors 16 and 26 output a zoom position voltage corresponding to the position of the variable power lenses 12 and 22. The zoom position voltage is large when the variator lenses 12 and 22 are on the wide side, and smaller when the variator lenses 12 and 22 are on the telephoto side.

FIG. 3 shows the output characteristics of the position detector in LU.
9 is a graph showing a method of correcting using T. The curve graph shown on the right side of the figure shows the zoom position voltage directly output from the first position detector 16 (or the second position detector 26). As shown in FIG.
The output of the zoom position voltage has a non-linear characteristic with respect to the zoom position between telephoto. The feature of the present embodiment is that the LUT 18 (or the LUT 28) corrects such a non-linear detection characteristic to match a linear characteristic function (reference zoom function).

That is, first, analog zoom position voltages output from the first position detectors 16 and 26 are digitized by AD converters 17 and 27, respectively, to obtain zoom voltage AD values. Next, the zoom voltage AD value is set to LUT1.
The input / output relationship of the LUTs 18 and 28 is determined and stored in advance so that the output data is in accordance with the reference zoom function. As a result, the left and right position detectors 16 and 26 have a common linearity with respect to a change in the zoom position of the variable power lenses 12 and 22.

FIG. 4 is a conceptual diagram of the LUT, and shows a state in which input digital values on the right side of the figure are associated with output data on the upper side of the figure. This LUT is constituted by an individually rewritable storage element, and by changing the setting of the correspondence, the output characteristics of the above-described position detector can be appropriately changed. FIG.
FIG. 2 is a block diagram illustrating a main part of a control system of a second driving unit 24 illustrated in FIG. 1. The zoom position data corrected by the LUTs 18 and 28 is input to a comparator 30, which detects an error between the left and right zoom positions. For example, if the zoom position data on the master side (left side) is A and the zoom position data on the slave side (right side) is B, a high (H) signal and a low (L) signal are output from the comparator 30 when A> B. Is output and applied to the motor driver 74 INA and INB, respectively.

When A = B, a low (L) signal and a low (L) signal are output from the comparator 30 and applied to INA and INB of the motor driver 74, respectively, where A <B.
In the case of B, a low (L) signal and a high (H) signal are output from the comparator 30, and the motor driver 74
INA, INB. FIG. 6 shows a motor driver 74.
And a correspondence table between output signals output from the motor driver 74 and combinations of input signals applied to the input terminals INA and INB.

If the input signals applied to the input terminals (INA, INB) are both low (L, L), the motor driver 7
4 output terminals (OUTA, OUTB) from (L,
L) is output. In this case, the motor 72 stops.
When the input signals applied to the input terminals (INA, INB) are (L, H), respectively, (L, H) are output from the output terminals (OUTA, OUTB) of the motor driver 74. In this case, the motor 72 is driven to the tele side.

If the input signals applied to the input terminals (INA, INB) are (H, L) respectively, the motor driver 7
4 output terminals (OUTA, OUTB) from (H,
L) is output. In this case, the motor 72 is driven to the wide side. When the input signals applied to the input terminals (INA, INB) are (H, H), respectively, the motor driver 7
4 output terminals (OUTA, OUTB) from (H,
H) is output. In this case, the motor 72 is braked. The same applies to the motor driver 64.

According to the driving apparatus for a zoom lens configured as described above, when a zooming command is issued in the tele direction or the wide direction by operating the zoom switch 36, the first zoom lens 10 is driven based on the command. Is done. On the other hand, the second zoom lens 20 is driven based on an error between the left and right zoom positions, and follows the first zoom lens. At this time, the output characteristic of the position detector that detects the left and right zoom positions is corrected by the LUT so as to coincide with a common reference zoom function having linearity.
Variations in the focal length error depending on the zoom position are suppressed, and errors in the left and right shooting magnifications due to individual differences in the zoom lens are reduced.

Since the second zoom lens follows the first zoom lens based on the output of the position detector, the left and right focal lengths can be matched with high accuracy. In the above-described embodiment, a case has been described where two LUTs are provided and the output characteristics of the two position detectors are converted into a common reference zoom function. However, a configuration in which one LUT is used is also possible. That is, in the zoom lens driving device shown in FIG. 1, one of the zoom position detection characteristics may be corrected using the LUT and the one of the other zoom position detection characteristics may be adjusted to the reference side.

FIG. 7 shows a method of correcting the output characteristic of the second position detector 26 (slave side) when the number of LUTs is one, so as to match the output characteristic of the first position detector 16 (master side). It is a graph shown. The curve graph shown on the upper right side of the figure shows the zoom data output directly from the master position detector, and the curve graph shown on the lower right side of the figure shows the zoom data output directly from the slave position detector. 4 shows zoom data to be displayed.

The analog zoom position voltage output from the position detector 26 on the slave side is converted to an AD converter 27.
And digitalized as the zoom voltage AD value. Next, the input / output relationship of the LUT 28 is determined and stored in advance so that the output voltage matches the master side zoom data by using the zoom voltage AD value as input data of the LUT (see the graph on the left side of the figure). . As a result, the left and right position detectors have a common output characteristic with respect to a change in the zoom position of each of the variable power lenses 12 and 22, and an error in the photographing magnification caused by an individual difference between the left and right zoom lenses is reduced. Can be reduced.

Next, a second embodiment of the present invention will be described with reference to FIG. 8, members that are the same as or similar to the configuration shown in FIG. 1 are given the same reference numerals, and descriptions thereof will be omitted. The second embodiment shown in FIG. 8 differs from the embodiment shown in FIG. 1 in that the first and second driving units 14 and 24 are simultaneously driven by operating the zoom switch 36, The point is that the left and right zoom speeds are controlled in accordance with the error between the left and right zoom positions to reduce the error in the zoom position.

With the operation of the zoom switch 36, the MPU
The H / L control signal output from 34 is applied to the master side motor driver 64 and also to the input pin of an OR gate 88 connected to the slave side motor drive 74. The output of the above-described comparator 30 is applied to the other input pin of the OR gate 88, and the output of the OR (OR) gate of both the OR gate 88 is used as the motor driver 74.
Is drive-controlled.

Therefore, even when the operation of the zoom switch 36 is released, if the error amount of the left and right zoom positions is larger than a predetermined value, the second drive unit 24 reduces the error of the zoom position to a predetermined range. Until the variable magnification lens 22 is driven. In other words, the left zoom lens is used as the master side, and the right zoom lens is used as the slave side, and the movement of the master-side zoom lens 12 is followed by the slave-side zoom lens 22. Even if the zoom switch 36 is released, the slave is moved until the following is completed. In addition, since the left and right zoom lenses are simultaneously driven by operating the zoom switch, errors in the zoom position at the beginning of the start can be reduced.

On the other hand, the left and right zoom position data are added to a subtractor 82 to detect a zoom position error. The zoom position error data is converted into an absolute value by an absolute value circuit 84.
The data is converted into an analog signal by the DA converter 86. And
The analogized zoom position error data is supplied to the amplifier 9.
2 to the motor driver 74,
It is applied to the motor driver 64 via the amplifier 93.
The motor drivers 74 and 64 respectively apply a voltage corresponding to the zoom position error to the motors 72 and 62 to adjust the zoom speed.

For example, if the slave zoom position is delayed with respect to the master zoom position and the error between them becomes large, the master zoom speed is reduced.
By increasing the zoom speed on the slave side, the error between the zoom positions of both is reduced. Conversely, if the zoom position on the slave side becomes excessive with respect to the zoom position on the master side, the zoom speed on the master side is increased and the zoom speed on the slave side is decreased, so that both zoom positions are The error can be reduced. Further, one of the left and right zoom speeds may be adjusted.

As described above, the error can be reduced by controlling at least one of the voltages applied to the motors 62 and 72 based on the error between the left and right zoom positions and controlling the zoom speed. . At this time, in consideration of the variation and non-linearity of the output characteristics of the position detectors that detect the left and right zoom positions, at least one of the zoom position data is corrected using a look-up table, and the output characteristics of both are made uniform. This is similar to the embodiment shown in FIG.

Therefore, according to the zoom lens driving device shown in FIG. 8, the fluctuation of the focal length error depending on the zoom position due to the detection characteristics of the position detector can be suppressed, and the zoom lens driving device can be controlled by the individual difference of the zoom lens. It is possible to reduce an error between the left and right photographing magnifications. Then, the focal lengths of the left and right zoom lenses can be matched with high accuracy.

[0041]

As described above, according to the zoom lens driving apparatus of the present invention, at least one of the position detectors for detecting the left and right zoom positions is corrected by the look-up table. Since the output characteristics of the two are made uniform, it is possible to suppress the fluctuation of the error of the focal length depending on the zoom position, and to reduce the error of the left and right photographing magnification due to the individual difference of the zoom lens. Thereby, the photographing magnifications of the left and right zoom lenses can be made to match with high accuracy, and a good stereoscopic image can be photographed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a driving device of a 3D zoom lens to which the present invention is applied.

FIG. 2 is a graph showing output characteristics of first and second position detectors.

FIG. 3 is a graph showing a method for correcting an output characteristic of a position detector using an LUT.

FIG. 4 is an explanatory diagram of a lookup table.

FIG. 5 is a block diagram showing a main part of a control system of a second drive unit 24;

FIG. 6 is a truth table of a motor driver.

FIG. 7 is a graph showing a method for correcting the output characteristic of the second position detector when there is one LUT.

FIG. 8 is a block diagram showing a configuration of a second exemplary embodiment of the present invention.

FIG. 9 is a configuration diagram of a conventional driving device for a 3D zoom lens.

[Explanation of symbols]

 10, 20 ... zoom lens 12 ... first variable power lens 16 ... first position detector 17, 27 ... AD converter 18, 28 ... lookup table (LUT) 22 ... second variable power lens 26 ... second Position detector 30 ... Comparator 34 ... Microprocessing unit (MPU) 36 ... Zoom switch 62,72 ... Motor 64,74 ... Motor driver

──────────────────────────────────────────────────の Continuation of front page (51) Int.Cl. ⁷ identification code FI G03B 35/08 G03B 3/00 A (58) Field surveyed (Int.Cl. ⁷ , DB name) H04N 13/00-15 / 00

Claims (3)

(57) [Claims] 1. A zoom lens driving device for driving first and second zoom lenses arranged in a pair on the left and right for capturing a stereoscopic image, comprising: a zoom switch for instructing zooming in a tele direction or a wide direction; First driving means for driving the first zoom lens in a telephoto direction or a wide direction by operating a zoom switch; and detecting a zoom position indicating a photographic magnification of the first and second zoom lenses, respectively. First and second detecting means for digitizing and outputting the obtained zoom position data; and inputting at least one of the zoom position data output from the first and second detecting means, An output value corresponding to a digital value of an input signal is stored in advance, and correction is performed so that the zoom position detection characteristics of the first and second detection units match. Based on at least one look-up table, and the first and second detecting means, and based on the zoom position data corrected by the look-up table, the photographing magnification of the second zoom lens is set to the first look-up table. And a second driving means for driving the second zoom lens so as to match the shooting magnification of the zoom lens. 2. A zoom lens driving device for driving first and second zoom lenses disposed in a pair on the left and right sides for capturing a stereoscopic image, wherein a command for zooming of the first and second zoom lenses is provided. Two zoom switches; first and second driving means for driving the first and second zoom lenses in accordance with the operation of the zoom switches; and a photographing magnification of the first and second zoom lenses, respectively. First and second detection means for detecting a zoom position, digitizing and outputting the detected zoom position data, and at least one of zoom position data output from the first and second detection means The zoom position data is input, an output value corresponding to the digital value of the input signal is stored in advance, and the zoom position detection characteristics of the first and second detection means are matched. At least one look-up table that is corrected by the first and second detection means, and calculates an error of the zoom position corrected by the look-up table and calculates the first position so as to reduce the error. And a speed control unit for controlling at least one of the zoom speeds of the first and second zoom lenses driven by the second driving unit. . 3. The zoom lens driving device according to claim 1, wherein the look-up table is configured by a storage element that can be individually rewritten.