JPH0682187B2 - Stereoscopic imaging device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a stereoscopic imaging device having a pair of zoom lenses whose imaging magnification changes.

(Prior Art) It is possible to easily change the angle of view even in a stereoscopic imaging device used for recording a family trip, taking a stereoscopic photograph of a landscape, or stereoscopically photographing a microbe, a mineral, or a terrain. Therefore, a zoom lens is increasingly used as the imaging lens.

While using a stereoscopic imaging device equipped with these zoom lenses, when changing the imaging magnification, you can manually view while looking at the viewfinder that allows you to see the left and right images at the same time, or the monitor TV that displays the left and right images at the same time. The image pickup magnification of each zoom lens is adjusted so that the left and right images have the same size.

(Problems to be Solved by the Invention) When various objects are imaged by using the above-described device, the optimum imaging magnification is different for each object, so that the imaging magnification of each object is changed. Changes need to be made. This imaging magnification is changed by changing the imaging magnification of both the left and right zoom lenses.
In addition to the poor operability that the image pickup magnifications of the two zoom lenses have to be changed, and since the image pickup magnifications of the two zoom lenses must match, changing the image pickup magnifications is an extremely troublesome task.

The present invention has been devised to solve the above problems, and an object of the present invention is to provide a stereoscopic imaging device capable of easily changing the imaging magnification.

(Means for Solving the Problem) In the stereoscopic imaging device of the present invention, when one zoom lens of the pair of zoom lenses is the first lens and the other zoom lens is the second lens, the first lens A first magnification changing unit that changes the imaging magnification of the first lens, a first magnification detecting unit that detects the imaging magnification of the first lens, and a second magnification changing unit that changes the imaging magnification of the second lens, The output of the first magnification detecting unit is indicated by sending a control output to the second magnification detecting unit that detects the imaging magnification of the second lens, and the first magnification changing unit and the second magnification changing unit. It is provided with a magnification control section for controlling to match the magnification and the magnification indicated by the output of the second magnification detection section.

(Operation) Since each of the pair of left and right zoom lenses is provided with a magnification detection unit that detects the imaging magnification and a magnification changing unit that changes the imaging magnification, the zoom lens has the optimum focal length for the target. When changing the image pickup magnification of, the magnification control unit controls the magnification change unit to change the image pickup magnification of each of the left and right zoom lenses, and the magnification detection unit provided in each of the left and right zoom lenses. The imaging magnifications of the pair of zoom lenses are set by matching the magnifications indicated by the outputs.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an external perspective view in which a part of the stereoscopic image pickup apparatus of the present invention is cut away.

In the figure, each of the pair of zoom lenses is composed of a front lens group 101, a variable magnification lens group 102 for changing the imaging magnification, and a rear lens group housed in a lens barrel 104. Are supported by a helicoid provided inside the lens barrel 104 so as to be movable in the optical axis direction when the drive gear 103 is rotated. And drive gear 10
A pinion gear 106 fixed to the drive shaft of a zoom motor 105 that is a stepping motor meshes with the shaft 3.

In addition, a minute photosensor 107 is embedded in the lower part of the lens barrel 110 in which the variable magnification lens group 102 is housed on the side of the front lens group 101 in a direction capable of detecting light from the lower part. Then, at a position corresponding to the photo sensor 107 in the lower part of the lens barrel 110, a diode array 108 which is elongated in the optical axis direction and whose inside is divided into a large number of small chambers 111 by a plurality of partition plates 109,
It is provided so as to be in contact with the lens barrel 110, and the upper surface of the diode array 108 is formed so that the curvature in the short direction thereof is the same as the radius of the outer peripheral surface of the lens barrel 110.

FIG. 2 is a sectional view showing a detailed configuration of the photo sensor 107 and the diode array 108.

At the bottom of each small chamber 111 divided by the partition plate 109 of the diode array 108, a minute light emitting diode 112 is provided.
Is attached. And these light emitting diodes
112 includes the front lens group 101 corresponding to each position.
Numbers are assigned that gradually increase from 0 as they go from the side toward the rear.

The length of the photo sensor 107 embedded in the lower portion of the lens barrel 110 in the optical axis direction is substantially the same as the length of the small chamber 111 in the optical axis direction.
Only the light of the light emitting diode 112a provided in 11 can be received.

It should be noted that the diode array 108 is configured so that its position can be slightly moved in the optical axis direction, and a difference in imaging magnification between the left and right zoom lenses caused by variations in parts of the optical system at the time of manufacture is This diode array
It has a structure that can be absorbed by the movement of 108.

FIG. 3 is a block diagram showing the electrical construction of an embodiment of the present invention.

In the figure, a block 41 surrounded by a broken line is a CP
It is composed of software processed by a microcomputer including U, ROM, and RAM.

Also, the alphabets shown at the end of the numbers given to each block include blocks with the same number, so in the following explanation, when it is necessary to distinguish between these blocks. Only, the blocks are distinguished by the numerical value including the alphabet, and in other cases, the blocks are designated only by the numbers.

The output of the photo sensor 107 is received through the input circuit 22 and is detected by the light receiving detection unit 4
12 is output to the drive circuit 2
It is led to the diode array 108 via 3. The output of the motor control unit 411 is sent to the zoom motor 105 via the drive circuit 21.

The output of the zoom switch 32 provided in the operation unit of the camera body (not shown) is guided to the control unit 414 via the input circuit 31, and from the control unit 414,
Outputs for control are sent to the light emission control unit 413 and the motor control unit 411. The motor controller 411 is provided with the output from the light reception detector 412.

Here, the correspondence between the words described in claim 1 and the drawings will be described.

The first lens and the second lens have the same configuration, and each has a front lens group 101 and a variable power lens group 102.
And a rear lens group in the lens barrel 104. The first magnification detecting unit and the second magnification detecting unit have the same configuration, and each of them has a photo sensor 107, a diode array 108, a light reception detecting unit 412, and a light emission control unit 41.
It is composed of 3 main parts.

The first magnification changing unit and the second magnification changing unit also have the same configuration, and the drive gear 103 and the zoom motor 105 are the main components. The magnification control unit is composed of a control unit 414 and a motor control unit 411.

The operation of the embodiment of the present invention will be described below.

When the zoom motor 105 is rotated and the drive gear 103 is rotated, the variable magnification lens group 102 is moved in the optical axis direction by the helicoid in the lens barrel 104. Therefore, since the focal lengths of the first lens and the second lens change,
The imaging magnification changes. This imaging magnification is a variable magnification lens group
102 becomes larger as it moves to the rear lens barrel 104 side,
It becomes smaller as it moves to the front lens group 101 side. In addition, a light emitting diode 1 that can receive light by a photo sensor 107 provided in the front part of the lens barrel 110 and the lower part on the front lens group 101 side
12, the corresponding light emitting diode 112 changes as the variable magnification lens group 102 moves.

FIG. 4 is a flowchart showing the operation in the block 41, which will be referred to as necessary in the following description.

When it becomes necessary to change the imaging magnification, the zoom switch 32 provided on the operation unit is operated. At this time, it is assumed that the switch 32U for instructing to increase the imaging magnification is pressed.

The depression of the zoom switch 32 is detected by the control unit 414 through the input circuit 31 (step). Further, it is determined which of the switches 32U and 32D is the switch (step). What was pressed is the switch 32 for instructing to increase the imaging magnification.
Since it is U, the program advances to the step after the step.

The control unit 414 gives an instruction to the light emission control unit 413 to move the position of the light emitting diode 112 to emit light. Therefore, when the variable magnification lens group 102 is at the position shown in FIG. 2, for example, the light emission of the light emitting diode 112a (the numerical value 4 is assigned as the number indicating the position of the light emitting diode 112) and the light emission is stopped. Diode 112b
(Numerical value 5 is assigned as the position number)
The emission control unit 413 controls the start of emission of light (step).

Then, the motor controller 411 is instructed to move the variable magnification lens group 102 backward. The motor control unit 411
According to this instruction, the zoom motor 105 is rotated to move the variable magnification lens group 102 rearward, and at the same time, the light reception detection unit 412
Wait for the detection signal to be sent from (step,).

The variable magnification lens group 102 moves rearward, and the photo sensor 107
When the position corresponding to the light emitting diode 112b to which the number 5 is assigned is reached, the light from the light emitting diode 112b is received by the photo sensor 107, so that the light receiving detector 412 via the input circuit 22 detects the light received. Detection is performed, and that effect is sent to the motor control unit 411. The motor control unit 411 notified of the detection of the received light stops driving the zoom motor 105 (step).

The above operation is performed in order to move both the lens groups of the variable power lens groups 102a and 102b (in the flowchart of FIG. 4, the movement of one variable power lens group 102 is described. In fact, it is operating in parallel due to time division). Therefore, the zoom motor 105
When the drive due to is stopped, the imaging magnifications of the two zoom lenses (the first lens and the second lens) are the same.

The control unit 414 checks whether the zoom switch 32 is still pressed (step). Then, when the zoom switch 32 is continuously pressed, the same instruction as described above is sent to the light emission control unit 413 and the motor control unit 411 to further increase the imaging magnification (steps-). In this way, the enlargement of the imaging magnification is continued while the zoom switch 32 is being pressed, and when the zoom switch 32 is no longer pressed, the operation shifts to the loop state by step.

When the switch 32D of the zoom switch 32 is pressed, the substantially same operation as described above is performed, and in the step following the step, the position of the light emitting diode 112 to be emitted by the light emission control unit 413 is changed to the front lens group 101 The motor controller 411 is instructed to move the variable power lens group 102 to the front lens group 101 side while giving one instruction to move the lens in the side direction (step).

The motor control unit 411 rotates the zoom motor 105 until the light reception detection unit 412 gives a notification of the detection of the received light, so that the variable magnification lens group 102 is moved to the front lens group 1.
When the detection of the received light is notified, the rotation of the zoom motor 105 is stopped (step,).

The same process is repeated thereafter, and when the switch 32D is no longer pressed, the step loop state is entered.

Since the variable magnification lens group 102 moves according to the above description, even when the switch 32U of the zoom switch 32 is pressed or when the zoom switch 32D is pressed, the switch 32U, 32D is no longer pressed. Then, the zoom magnification including the zoom lens group 102a and the zoom magnification including the zoom lens group 102b are equal to each other.

The present invention is not limited to the above-mentioned embodiment, and the first and second
Regarding the magnification detection unit, the configuration for detecting the imaging magnification based on the movement position of the variable magnification lens group 102 in the optical axis direction has been described, but by detecting the rotational position of the drive gear 103, the imaging magnification of It is possible to adopt a configuration for performing detection.

Further, the diode array 108 is used to detect the position of the variable power lens group 102 in the optical axis direction.
The position of the light emitting diode 112 to be emitted in the inside is changed, and when the light of the changed light emitting diode 112 is received by the photo sensor 107, the configuration in which the variable magnification lens group 102 is determined to be at the predetermined position has been described. A position detection plate provided with a minute slit along the axial direction is provided, and a photosensor and a light emitting diode for detecting the slit are provided on the side of the lens barrel 110, which is detected before the movement of the lens barrel 110. It is possible to determine that the variable magnification lens group 102 has moved to a predetermined position when a slit adjacent to the existing slit is detected.

(Effects of the Invention) In the stereoscopic imaging apparatus according to the present invention, each of the pair of zoom lenses is provided with a magnification changing unit that changes the imaging magnification and a magnification detecting unit that detects the imaging magnification, and each magnification detecting unit. Since the magnification change section is controlled by the magnification control section so that the magnifications indicated by
Since the left and right zoom lenses are set to have the same imaging magnification, the imaging magnification can be easily changed.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of the present invention, FIG. 2 is a sectional view showing a detailed structure of a photosensor and a diode array, and FIG. 3 is an electrical view of the embodiment of the present invention. FIG. 4 is a block diagram showing a dynamic configuration, and FIG. 4 is a flowchart showing an operation in a block surrounded by a broken line in FIG. 101 …… Front lens group 102 …… Variable magnification lens group 103 …… Drive gear 105 …… Zoom motor 107 …… Photo sensor 108 …… Diode array 411 …… Motor control unit 412 …… Light receiving detection unit 413 …… Light emission control Section 414 …… Control section

Claims (1)

[Claims] 1. A stereoscopic imaging device having a pair of zoom lenses, wherein when one zoom lens of the pair of zoom lenses is a first lens and the other zoom lens is a second lens, A first magnification changing unit that changes the imaging magnification, a first magnification detecting unit that detects the imaging magnification of the first lens, a second magnification changing unit that changes the imaging magnification of the second lens, and The second magnification detecting unit that detects the image pickup magnification of the second lens, and the control output to the first magnification changing unit and the second magnification changing unit, thereby outputting the magnification indicated by the output of the first magnification detecting unit. And a magnification control unit that performs control to match the magnification indicated by the output of the second magnification detection unit.