JP3303255B2 - Driving device for zoom lens - Google Patents

Driving device for zoom lens

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Publication number
JP3303255B2
JP3303255B2 JP34275195A JP34275195A JP3303255B2 JP 3303255 B2 JP3303255 B2 JP 3303255B2 JP 34275195 A JP34275195 A JP 34275195A JP 34275195 A JP34275195 A JP 34275195A JP 3303255 B2 JP3303255 B2 JP 3303255B2
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Japan
Prior art keywords
zoom
zoom lens
lens
driving
magnification
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JP34275195A
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JPH09187040A (en
Inventor
好司 金子
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富士写真光機株式会社
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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 driving device for the zoom lens shown in FIG.
A video camera 1 and a video camera 1 are controlled by a micro-processing device 3 in synchronization with each other. The first drive unit 14 mainly drives a variable power lens 12 of a left zoom lens 10 and the left zoom lens 10 A first position detector 16 for detecting the zoom position (for example, a value indicating the position of the variable power lens 12), a second drive unit 24 for driving the variable power lens 22 of the right zoom lens 20, A second position detector 26 for detecting a right zoom position, a microprocessing unit (MPU) 34 for synchronously controlling the first and second drive units, and a zoom for performing a tele / wide zoom command operation. It is composed of a switch 36 and the like. 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 left and right video cameras, a drive device for a zoom lens that can make the right and left image magnifications match 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 photographing magnification of the zoom lens, and photographing of the second zoom lens based on zoom position data detected by the first and second detecting means. Second driving means for driving the second zoom lens so that the magnification is equal to the photographing magnification of the first zoom lens; and the first and second zooms, respectively. First and second image pickup means for picking up an image of a subject that has passed through a lens, and one of a pair of images picked up by the first and second image pickup means so that one image magnification is equal to the other image magnification. Electronic zoom means for electrically enlarging or reducing based on the zoom position data detected by the first and second detection means.

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. Based on the position data, the right and left photographing magnifications are driven so as to match, and follow the movement of the first zoom lens. At this time, based on the output of the position detector that detects the left and right zoom positions, one of the image magnifications is electrically scaled and adjusted to match the other image magnification.
A slight error in the photographing magnification during the following of the zoom lens can be eliminated on the image. As a result, the first and second
The left and right image magnifications can be matched with high accuracy even during the driving of the zoom lens.

According to another aspect of the present invention, there is provided a zoom lens driving apparatus for driving first and second zoom lenses disposed in a pair on the left and right for capturing a stereoscopic image. A zoom switch for instructing zooming, a first driving unit for driving the first zoom lens in a telephoto direction or a wide direction by operating the zoom switch, and a photographing magnification of the first and second zoom lenses, respectively. And first and second detecting means for digitizing and outputting the detected zoom position data, and inputting the zoom position data of at least one of the first and second detecting means. Then, an output value corresponding to the digital value of the input signal is stored in advance,
At least one lookup table for correcting the zoom position detection characteristics of the first and second detection means so that they match each other; and a zoom detected and detected by the first and second detection means and corrected by the lookup table. A second driving unit that drives the second zoom lens based on the position data such that a photographing magnification of the second zoom lens matches a photographing magnification of the first zoom lens; First and second image pickup means for picking up an image of a subject that has passed through a second zoom lens, and one image magnification of one of a pair of images picked up by the first and second image pickup means. Electronic zoom means for electrically enlarging or reducing the zoom position data based on the zoom position data detected by the first and second detection means so as to match the magnification. To have.

According to the present invention, at least one of the zoom position data is corrected by the look-up table in consideration of the variation and the non-linearity of the output characteristics of the position detector for detecting the left and right zoom positions, and the output of both is corrected. The characteristics are made uniform. Further, based on the zoom position data, one of the image magnifications is electrically scaled and adjusted so as to match the other image magnification. Therefore, a slight magnification error during the following of the second zoom lens. Can also be eliminated on the image. Thus, the left and right image magnifications can be matched with high accuracy even during the driving of the first and second zoom lenses.

[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.
Is controlled by the microprocessing device 3 and the zoom switch 36 for performing a tele / wide zooming instruction operation.

The video cameras 1 and 2 have substantially the same configuration on the left and right, and each camera is roughly divided into a lens system, a lens control system, and an imaging system. The video camera 1 will be described on the left side and the video camera 2 will be described on the right side, but left and right can be switched. Video camera 1 on the left
The lens system includes a fixed lens 42, a variable power lens 12, and a focus lens 43. The magnification is changed by moving the variable power lens 12 back and forth, and the focus is adjusted by moving the focus lens 43 forward and backward. Is done.

The lens control system includes a zoom lens control system for driving and controlling the variable power lens 12 and a focus lens 43.
And a focus lens control system for driving and controlling the lens. The zoom lens control system includes a motor 62 for driving the variable power lens 12, a motor drive circuit (motor driver) 64 for operating the motor 62,
The motor driver 64 is controlled by a control signal from the MPU 34, and drives the motor 62 based on the control signal. That is, the zoom switch 36
When a zooming command is issued in the tele direction by the MPU 34,
When the zoom signal is output from the MPU 34 to the motor driver 64, the MPU 34 outputs a tele signal = L (H) and a wide signal = Low (L). , A control signal of wide signal = H is output to the motor driver 64. When the zooming command by the zoom switch 36 is released, a control signal of tele signal = L and wide signal = L is output to the motor driver 64. Then, the variable power lens 12 is driven back and forth by the motor 62,
The photographing magnification of the zoom lens 10 is changed.

The first position detector 16 comprises, 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. This zoom position voltage Va is used as information indicating the shooting magnification of the left zoom lens 10. The zoom position voltage Va is set to 0 to 2 by the AD converter 17.
After being digitized in the range of 55, it is added to a look-up table (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 a comparator 30 and a subtractor 32, which will be described later, and is notified to the MPU 34. The LUT 18 will be further described later.

The focus lens control system includes a motor 66 for driving the focus lens 43 in the front-rear direction, a motor drive circuit (motor driver) 67 for operating the motor 66, and a sensor for detecting the position of the focus lens. The motor driver 67 is controlled based on an auto focus (AF) unit (not shown) to drive the focus lens 43 to focus.
The focus lens 43 is driven so as to obtain a focused state in accordance with the position of the variable power lens 12. Then, the sensor 68 detects the position of the focus lens 43 and notifies the MPU 34 as focus position data.

Next, the imaging system of the video camera 1 will be described. This imaging system includes a CCD 45, a CCD drive circuit (driver) 46, a CDS circuit 47, a reference signal generator (SSG) 49, and an auto gain controller (AGC)
82, AD converter 83, electronic zoom circuit 84, DA
It comprises a converter 85 and the like.

The subject light passing through the above-described lens system is
An image is formed on the light receiving surface of the CCD 45, and is converted into R, G, and B signal charges corresponding to the light intensity. The R, G, and B charges are read out by a readout pulse applied from the CCD drive circuit 46, separated into signals by the CDS circuit 47, adjusted in gain by the AGC 82, and digitized by the AD converter 83. The digitized image signal is subjected to known signal processing (not shown), the image magnification is adjusted by an electronic zoom circuit 84, and the DA converter 8
5 and output as a video signal. The timing signals from the SSG 49 are added to the CCD drive circuit 46 and the CDS circuit 47, respectively, so that the circuits are synchronized.

The electronic zoom circuit 84 includes an arithmetic processing unit, an image memory, and the like. The electronic zoom circuit 84 electronically executes an address control of reading in an image memory for storing digital image signals for one screen and an interpolation operation of the read digital image signals. The screen is enlarged or reduced. In the present embodiment, the magnification of the electronic zoom of the left camera is set to a fixed value of, for example, about 1.1 times.

On the other hand, for the right video camera 2,
The lens system includes a fixed lens 52, a variable power lens 22, and a focus lens 53, and the lens control system includes a zoom lens control system for driving and controlling the variable power lens 22 and a focus lens control system for driving and controlling the focus lens 53. And the above-mentioned left video camera 1
Is the same as

The right zoom lens control system includes a motor 72 for driving the variable power lens 22, a motor drive circuit (motor driver) 74 for operating the motor 72, and a second drive for detecting the position of the variable power lens 22. 2 position detector 26
However, the control method is different from that of the first drive unit described above. That is, the motor driver 74
Is driven and controlled based on the error between the left and right zoom positions detected by the comparator 30, and reduces the error in the zoom position caused by the movement of the left zoom lens driven in advance by operating the zoom switch 36. The variable power lens 22 is driven so as to perform the operation. In other words, by using the left zoom lens as the master side and the right zoom lens as the slave side, the slave variable power lens 22 follows the movement of the master variable power lens 12, thereby reducing the error in the left and right shooting magnification. It is extremely small. This control will be further described later.

The second position detector 26 detects the position of the variable power lens 22 and outputs it as a zoom position voltage Vb. The zoom position voltage Vb is digitized by the AD converter 27 in the range of 0 to 255, and then the LUT
28 and corrected. The LUT 28 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 the output characteristic of the second position detector 26 with a reference zoom function serving as a reference. have. As a result, the output characteristics of the first position detector 16 on the left side are aligned with the common reference zoom function.

The zoom position data corrected by the LUT 28 is applied to a comparator 30 and a subtractor 32 and is also notified to an MPU 34. The right focus lens control system includes a motor 76 for driving the focus lens 53 in the front-rear direction, and a motor drive circuit (motor driver) 77 for operating the motor 76. The motor driver 77 is controlled on the basis of this, and drives the focus lens 53 to focus, and also drives the focus lens 53 so as to obtain a focused state in accordance with the position of the variable power lens 22. And the sensor 78
Detects the position of the focus lens 53 and notifies the MPU 34 as focus position data.

Next, the imaging system of the right camera will be described. This imaging system is, like the left side described above, a CCD 5
5, CCD drive circuit (driver) 56, CDS circuit 5
7, a reference signal generator (SSG) 59, an auto gain controller (AGC) 92, an AD converter 93, an electronic zoom circuit 94, a DA converter 95, and the like.

The difference from the configuration on the left is that the electronic zoom circuit 94 is controlled according to the output of the subtractor 32 to correct the electronic zoom magnification. That is, based on the left image magnification, the right image magnification is finely adjusted based on the difference between the left and right photographing magnifications. This electronic zoom magnification adjustment will be described later. Next, drive control of the right zoom lens will be described.

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 the figure, the output of the zoom position voltage has a non-linear characteristic with respect to the zoom position between the wide end and the tele end. The LUT 18 (or LUT 28) corrects such a non-linear detection characteristic so as to match a linear characteristic function (reference zoom function).

That is, the analog zoom position voltages output from the first position detectors 16 and 26 are first digitized by AD converters 17 and 27, respectively, to obtain a zoom voltage AD value. 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, 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 motor driver 74 that drives the right zoom lens 20 illustrated in FIG. 1.
The zoom position data corrected by the LUTs 18 and 28 shown in FIG.
With 0, an error between the left and right zoom positions is detected. At this time, for example, assuming that 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, when A> B, the high (H) signal and the low ( L) A signal is output and applied to INA and INB of the motor driver 74, 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 <A
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.

When 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. However, in order to reduce the left and right zoom position errors, it is necessary to set the right driving speed higher than the left driving speed.

Next, the magnification correction of the right electronic zoom circuit will be described. FIG. 7 is a main block diagram showing a specific configuration of the electronic zoom circuit 94. Electronic zoom circuit 84
Is mainly composed of a write buffer 102, a frame memory 104, a read buffer 106, a write address generation circuit 108, a read address generation circuit 110, a timing signal generation circuit (SSG) 112, and the like.

Image signals digitized by the AD converter 93 shown in FIG. 1 are sequentially input to the write buffer 102 via a digital signal processor (DSP) (not shown). The address of the image signal temporarily stored in the write buffer 102 is designated by the write address generation circuit 108,
Based on the write timing signal from SG 112,
The data is written to the frame memory 104. The image data written in the frame memory 104 is read according to the read address specified by the read address generation circuit 110, and is output to the DA converter 95 via the read buffer 106. The timing is adjusted by the SSG 112 so that the write operation and the read operation are alternately repeated. In addition, when a read address is added to the frame memory, an enlarged screen or a reduced screen can be obtained by adjusting a read start address, a read timing, and the like. Various necessary operations are performed by an operation processing unit (not shown) or the MPU 34.

The feature of this embodiment resides in that the read address generating circuit 110 is controlled based on the output from the subtractor 32 shown in FIG. 1 to finely adjust the magnification of the right screen. The subtracter 32 outputs a signal corresponding to the difference between the left zoom position data corrected by the LUT 18 and the right zoom position data corrected by the LUT 28. As shown in FIG.
Thus, the output characteristics of the zoom position detectors 16 and 26 are made uniform, and since the focal length error does not vary depending on the zoom position, the image magnification can be adjusted by the difference between the zoom positions.

When the photographing magnification of the right zoom lens 20 is smaller than the photographing magnification of the left zoom lens 10, the screen is enlarged by the electronic zoom circuit 94 in accordance with the photographing magnification difference (zoom position difference). When the photographing magnification of the zoom lens 20 is larger than the photographing magnification of the left zoom lens 10, the screen is reduced by the electronic zoom circuit 94 to make the right and left image magnifications equal. When the right-side photographing magnification is larger than the left-side photographing magnification and the right-side screen is reduced by the electronic zoom, the right-side screen is electronically zoomed because the left-side electronic zoom magnification is slightly larger at 1.1 times. There is no shortage of image information when the image is reduced.

According to the zoom lens driving device configured as described above, when a zooming command is issued in the telephoto or wide direction by operating the zoom switch 36, the left (master) zoom lens is operated based on the command. 10 is driven. On the other hand, the right (slave side) zoom lens 20 is driven based on the error between the left and right zoom positions,
It follows the zoom lens 10 on the master side. At this time, the output characteristics of the position detectors 16 and 26 for detecting the left and right zoom positions are corrected by the LUTs 18 and 28 so as to coincide with a common reference zoom function having linearity. The fluctuation of the focal length error is suppressed, and the error of the left and right photographing magnification due to the individual difference between the zoom lenses 10 and 20 is reduced.

Then, the variable power lens 22 on the slave side is made to follow the variable power lens 12 on the master side based on the outputs of the position detectors 16 and 26, so that the focal lengths on the left and right coincide with each other with high precision. be able to. Furthermore, L
Based on the zoom position data corrected by the UTs 18 and 28, the magnification of the electronic zoom on the slave side is controlled so that the image magnification on the slave side matches the image magnification on the master side. Even a slight error in the photographing magnification during the follow-up driving of No. 22 can be eliminated on the image. Thereby, the right and left image magnifications can be matched with high accuracy even during the zooming driving of the zoom lens.

In the above embodiment, two LUTs are provided,
Although the case has been described where the output characteristics of the two position detectors are converted to a common reference zoom function, an embodiment in which one LUT is configured is also possible. That is, in the zoom lens driving device shown in FIG. 1, only one zoom position detection characteristic is set to L based on one zoom position detection characteristic.
The correction may be made by the UT so as to be aligned with the reference side.

FIG. 7 shows a method of correcting the output characteristic of the second position detector 26 (slave side) in the case of one LUT 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.

Further, in the above embodiment, the case where the output characteristics of the zoom position detectors 16 and 26 are shared by using the LUT has been described. However, the output characteristics of the zoom position detector have sufficient linearity. When the individual difference is negligible, the LUT may not be used.

[0044]

As described above, according to the driving apparatus for a zoom lens according to the present invention, of the two left and right zoom lenses, the first zoom lens is moved in the tele direction or the wide direction by operating the zoom switch. The second zoom lens is driven such that the left and right shooting magnifications match based on the zoom position data indicating the shooting magnifications of the left and right zoom lenses, and further, based on the left and right zoom position data, Since the image magnification is electrically adjusted so as to match the image magnification of the other image, it is possible to drive the left and right zoom lenses so that the photographing magnifications match with high accuracy, and to perform the second operation. Even a slight error in the photographing magnification during the following of the zoom lens can be eliminated on the image.

Further, the zoom position data of at least one of the position detectors for detecting the left and right zoom positions is corrected by a look-up table so that the output characteristics of both are made uniform. The fluctuation of the focal length error can be suppressed, and the error of the left and right photographing magnification due to the individual difference of the zoom lens can be reduced. Then, based on the zoom position data corrected by the look-up table, one of the image magnifications is electrically scaled and adjusted so as to match the other image magnification. And a good stereoscopic image can be taken.

[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 the motor driver 74;

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

FIG. 7 is a block diagram illustrating a configuration of an electronic zoom circuit.

FIG. 8 is a graph showing a method of correcting the output characteristic of the second position detector when there is one lookup table.

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

[Explanation of symbols]

 10, 20 ... zoom lens 12, 22 ... variable power lens 16 ... first position detector 17, 27 ... AD converter 18, 28 ... lookup table (LUT) 26 ... second position detector 30 ... comparator 32 ... Subtractor 34 ... Microprocessing unit (MPU) 36 ... Zoom switch 62,72 ... Motor 64,74 ... Motor driver

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) H04N 13/00-15/00

Claims (2)

(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; first and second detecting means for detecting a zoom position indicating a photographic magnification of the first and second zoom lenses, respectively; A second detection unit configured to match a shooting magnification of the second zoom lens with a shooting magnification of the first zoom lens based on zoom position data detected by the first and second detection units. Second driving means for driving the second zoom lens, and first and second imaging means for capturing a subject image passing through the first and second zoom lenses, respectively. A second image pickup means, and a pair of images picked up by the first and second image pickup means, wherein one image magnification is detected by the first and second detection means so as to match the other image magnification. Electronic zoom means for electrically enlarging or reducing based on the zoom position data.
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, 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 detection means for digitizing and outputting the obtained zoom position data, and zoom position data of at least one of the first and second detection means, and converting the digital value of the input signal into a digital value. At least one look-up for storing a corresponding output value in advance and correcting the zoom position detection characteristics of the first and second detection means so that they match. And a table, wherein the photographing magnification of the second zoom lens is set to the photographing magnification of the first zoom lens based on the zoom position data detected by the first and second detecting means and corrected by the look-up table. A second driving unit that drives the second zoom lens so as to coincide with each other; a first and a second imaging unit that capture a subject image that has passed through the first and second zoom lenses, respectively; Based on the zoom position data detected by the first and second detection means, one of the pair of images picked up by the first and second image pickup means is set to have one image magnification equal to the other image magnification. A zoom lens driving device, comprising: electronic zoom means for dynamically expanding and contracting.
JP34275195A 1995-12-28 1995-12-28 Driving device for zoom lens Expired - Lifetime JP3303255B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP34275195A JP3303255B2 (en) 1995-12-28 1995-12-28 Driving device for zoom lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP34275195A JP3303255B2 (en) 1995-12-28 1995-12-28 Driving device for zoom lens

Publications (2)

Publication Number Publication Date
JPH09187040A JPH09187040A (en) 1997-07-15
JP3303255B2 true JP3303255B2 (en) 2002-07-15

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