JPH06153240A - Filter device and zoom device for stereoscopic television camera - Google Patents

Abstract

PURPOSE:To simplify the structure of a filter disk device and to reduce the cost. CONSTITUTION:A filter disk 32 is fitted to a case 31 via a rotary shaft 33. A motor driving the filter disk 32 is installed to one side of the filter disk 32 and a potentiometer 37 is installed to other side of the filter disk 32 via 2-stage gears 36 reducing the drive. Filters 34a-34h are provided symmetrical to the rotary shaft 33 with respect to the filter disk 32 and the opposite filters among them are selected to be of the same kind.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter device and a zoom device for a stereoscopic television camera in which two lens devices are mounted in parallel to shoot a stereoscopic image.

[0002]

2. Description of the Related Art Conventionally, a stereoscopic television camera of this type has a structure in which two television cameras are juxtaposed and combined into one housing. One device is arranged in front of each of two optical systems, that is, lenses, and each device is driven by an independent drive system.

For example, as shown in FIG. 7, two filter disks 2a and 2b which are symmetrically installed in a housing 1 are
The filter disks 2a and 2b are rotated by the motors 4a and 4b via the idle gears 3a and 3b, and the rotations of the filter disks 2a and 2b are transmitted to the potentiometers 6a and 6b through the idle gears 3a and 3b and the two-stage gears 5a and 5b. Here, the idle gears 3a and 3b separate the motors 4a and 4b and the potentiometers 6a and 6b from a prism portion (not shown) to prevent interference between them.

On the other hand, in a zoom lens device, a pair of lens devices having the same zoom ratio are arranged on the left and right sides, and by interlocking them, the zoom ratio and focus of both lens devices are set to be the same. . Then, the images taken by both lens devices are converted into an electric signal by the image pickup means including a pair of CCDs having the same specifications, and the electric signal is transmitted to the image receiver and displayed. At this time, since both images are alternately projected on the image receiver, when the images are viewed through a device that alternately blocks the lines of sight of both at the same cycle,
The images are viewed with the eyes corresponding to each other, and the parallax between the images is sensed so that the images can be viewed stereoscopically.

For example, as shown in FIG. 8, a pair of lens devices 11a and 11b in which optical axes La and Lb are arranged in parallel are lens groups 12a and 12b, lens groups 13a and 13b, and lens group 14a as a zoom lens optical system. , 14b, lens group 1
5a and 15b, focus is adjusted by movement of the lens groups 12a and 12b, zoom is set by relative movement of the lens groups 13a and 13b and lens groups 14a and 14b, and movement is achieved by movement of the lens groups 15a and 15b. The tracking of the image plane is adjusted.

The lens groups 13a, 13b and the lens groups 14a, 14b are adapted to be driven by a command from the zoom variable means 16, and a command signal is given to the motor control section 17 so that a potentiometer 18 is provided. The motor 19 rotates, and the rotation is transmitted to the gears 21a and 21b via the common gear 20 so that the mechanical cam 22a,
22b rotates. The rotation of the mechanical cams 22a and 22b is performed by rotating the cam grooves 23a and 23b and the cam groove 24, respectively.
Pins 25a and 25b and pins 26 fitted to a and 24b
It is transmitted to the lens groups 13a and 13b and the lens groups 14a and 14b via a and 26b.
13b and the lens groups 14a and 14b move in the optical axis La direction.

At this time, the loci of the cam grooves 23a and 23b and the loci of the cam grooves 24a and 24b are formed to be the same, and the reduction ratio of the gears 20 and 21a and the reduction ratio of the gears 20 and 21b are also the same. Therefore, both lens groups 13a and 13b and lens group 14 with respect to the rotation of the motor 19 are
Since the movement amounts of a and 14b are the same, both zooms are set to be equal.

On the other hand, with respect to focusing, both lens groups 12a and 12b are made to interlock by a mechanism similar to zooming.

[0009]

However, in the above-described conventional example shown in FIG. 7, since two filter disk devices 2a and 2b having the same specifications are required, the motors 4a and 4b and the potentiometer are correspondingly provided. 6a, 6b
Electrical parts such as, idle gears 3a, 3b, two-stage gear 5
Two mechanical parts such as a and 5b are required, which is disadvantageous in terms of cost. Further, since the two optical systems are provided close to each other, there is no room in the space, and the structure for installing the two filter disks 2a and 2b is complicated.

On the other hand, in the above-described conventional example shown in FIG. 8, even if the lens devices 11a and 11b having the same specifications are used, the zoom cannot be set to the same due to their manufacturing errors, or the cam grooves 23a, 23b and cam groove 24a,
There is a problem that due to the processing error of 24b, the lens groups 13a and 13b and the lens groups 14a and 14b do not move to the same position, and the zoom and focus settings are deviated, so that a good stereoscopic image cannot be obtained. Further, in order to correct these mutual differences, it is necessary to rework the mechanical cams 22a and 22b, which is extremely troublesome.

A first object of the present invention is to solve the above problems and provide a filter device for a stereoscopic television camera having a simple structure and low cost.

A second object of the present invention is to solve the above-mentioned problems and to provide a zoom device for a stereoscopic television camera which can easily correct the mutual difference.

[0013]

A filter device for a stereoscopic television camera according to a first aspect of the present invention for achieving the above object is characterized in that filters of the same type are symmetrically attached to the axis of a filter disk.

A zoom device for a stereoscopic television camera according to the second aspect of the present invention, means for storing data for correcting a mutual difference between at least one of zoom and focus of two lens devices having a plurality of lens groups. , And at least two motors for moving these lens groups, and means for controlling these motors.

[0015]

In the filter device for a stereoscopic television camera according to the first aspect of the present invention having the above-described structure, the same type of filter is symmetrically attached to the axis of the filter disc, the filter disc is rotated, and the same type of filter is used for both cameras. Set before.

The zoom device for a stereoscopic television camera according to the second aspect of the invention stores data for correcting the mutual difference between at least one of the lens groups of zoom and focus, and the motor is rotated according to this data to rotate the lens groups. To move.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the embodiments shown in FIGS. 1 is a sectional view of the filter disk device of the first embodiment, FIG. 2 is a side view of an optical system using this filter disk device, FIG. 3 is a front view of this optical system, and FIG. It is also a sectional view taken along the line AA.
A filter disk 32 is rotatably attached to the housing 31 via a rotating shaft 33, and eight filters 34a to 34h are attached to the filter disk 32 symmetrically with respect to the rotating shaft 33. These filters 34a-3
Among the 4h, the filters 34a, 34e, the filters 34b, 34f, the filters 34c, 34g, and the filters 34d, 34h that face each other are of the same type. A motor 35 for rotating the filter disc 32 is installed on one side of the filter disc 32 through a gear 35a, and the filter disc 3 is provided on the other side of the filter disc 32.
A potentiometer 37 is installed via a two-stage gear 36 for decelerating the rotation of 2.

On the other hand, on the front plate 31a of the housing 31, a guide rail 38 for locking a mount of a lens device (not shown) is provided.
And a mount 39a of the lens device having the optical axis La and a mount 39b of the lens device having the optical axis Lb are provided on both sides of the center of the front plate 31a. In addition, prisms 40 for color separation are installed on both sides of the center of the rear plate 31b of the housing 31.

With this structure, the filter disk 32 is rotationally driven by the motor 35, and the filter 34a
Opposite filters in ~ 34h are mounts 39a, 3
It is located behind 9b. At the same time, the rotation is reduced by the two-stage gear 36 and transmitted to the potentiometer 37.

As described above, in the embodiment, the filter disc 32, the motor 35, the two-stage gear 36, and the potentiometer 3 are used.
Since 7 is one set at a time, the number of parts, the number of assembling man-hours, the electrical adjustment portion, etc. are reduced. Also, the filter disc 3
Since there is only one, it is possible to make a simple structure without being affected by space.

Although the filter disk 32 is driven by the motor 35 in the embodiment, it may be manually driven. In addition, the filter disk 32
However, more filters are combined by using two or more filter discs, for example, ND filters, CC filters, effect filters, etc., and arranging them in the optical axis direction to increase the number of filters. Can be combined.

FIG. 4 is a block diagram of the zoom lens apparatus according to the second embodiment, which is a lens apparatus 41 in which optical axes La and Lb are arranged in parallel.
Focusing lens groups 42a, 4a are provided in a and 41b.
2b, lens groups 43a and 43b for zooming and lens group 4
4a and 44b, and lens groups 45a and 45b for image formation are arranged. Lens groups 43a and 43b and lens group 44
a and 44b have pins 46a and 46b and pins 47a and 47b.
b is fixed, and these are mechanical cams 48a and 48b.
Cam grooves 49a, 49b and cam grooves 50a, 5 formed on the
0b is slidably fitted. Mechanical cam 48
Motors 51a and 51b are connected to a and 48b, and potentiometers 52a and 52b that detect the rotation angles of the motors 51a and 51b and motor control units 53a and 53b that control the rotation of the motors 51a and 51b are connected. Has been done.

A zoom mutual difference correcting means 54 for correcting the mutual difference of the zoom ratios between the lens devices 41a, 41b is connected to the motor control portions 53a, 53b. The zoom mutual difference correcting means 54 corrects the mutual difference. A correction data storage unit 55 that stores data for zooming and a zoom control unit 56 that issues a command to change the zoom are connected. here,
In the process of manufacturing the lens devices 41a and 41b, the relationship between the rotation angle of the mechanical cams 48a and 48b and the zoom ratio is measured, and these data are stored in the correction data storage unit 55.

With such a configuration, the lens device 41
When a set value for changing the zoom of a and 41b is sent from the zoom control means 56 to the zoom mutual difference correction means 54, the zoom mutual difference correction means 54 stores the correction angle of the rotation angle of the mechanical cams 48a and 48b for the set value. The motor 51 is read from the unit 55 and the motor controller 53a, 53b is loaded with the motor 51.
The motors 51a and 51b are rotated by instructing the rotation angles of a and 51b. When the mechanical cams 48a, 48b rotate by the rotation of the motors 51a, 51b, the cam grooves 49a,
49b and the pin 46a fitted in the cam grooves 50a, 50b,
46b and the pins 47a and 47b slide, and the lens group 43
a, 43b and the lens groups 44a, 44b are moved to set a new zoom ratio. At this time, the lens device 41a,
Since each zoom ratio of 41b is set by the data measured in advance and stored in the correction data storage unit 55, there is no mutual difference in zoom ratio between the lens devices 41a and 41b, which is good. You will be able to obtain a good image. It should be noted that although the zoom has been described in this embodiment, the mutual difference can be corrected for the focus by the same mechanism.

FIG. 5 is a block diagram of the third embodiment. Here, the lens group 43 of both lens devices 61a and 61b is used.
a, 43b and the lens groups 44a, 44b are the common motor 6
2 are moved simultaneously by, for example, one lens device 61
The lens group 43a and the lens group 44a of a are further moved by the pulse motors 63a and 64a.

That is, each mechanical cam 65a,
65b is connected to a common gear 67 via gears 66a and 66b, and this gear 67 is connected to a motor 62 equipped with a potentiometer 68. Further, the motor 62 and the potentiometer 68 are connected to the motor control circuit 69. On the other hand, the cam grooves 70a, 7 of the mechanical cam 65a
1a is provided with a sliding member 74 via pins 72a and 73a.
The sliding members 74a and 75a slide in the optical axis La direction when the mechanical cam 65a rotates by connecting the a and 75a. Sliding members 74a, 75a
Is a holding member 76 for holding the lens groups 43a and 44a.
a and 77a are movably attached to the sliding members 74a and 75a.

Female screw portions 78a and 79a are attached to the upper portions of the holding members 76a and 77a, and feed screws 76a and 77 driven by pulse motors 63a and 64a are attached to these.
a is screwed together and the feed screws 80a and 81a are rotated, so that the holding members 76a and 77a are slidable to the sliding members 74a and 75a.
It is designed to move up. Pulse motor 63a,
Motor control units 82a and 83a are connected to 64a, and the motor control units 82a and 83a are zoom mutual difference correction means 54.
It is connected to the.

With this arrangement, the lens group 43a,
43b and the lens groups 44a and 44b are driven by a common motor 62, and the mutual difference in zooming that occurs at that time is that the lens groups 43a and 44a of the one lens device 61a are driven by the pulse motors 63a and 64a to move slightly. It is corrected by doing. In this embodiment, when the lens devices 61a and 61b are manufactured, the movement amount of the lens groups 43a and 44a and the lens groups 43a and 44a is set based on the zoom ratio of the lens device 61b. It is necessary to measure and store the data in the data storage unit 55.

In the present embodiment, the sliding member 74a,
75a and holding members 76b, 7 of the other lens device 61b
The mechanical cams 65a, 6
You may make it move only by rotating one side of 3b.

FIG. 6 shows a fourth embodiment, in which an electronic cam is used instead of the mechanical cam for one of the two lens devices 91a and 91b. For example, in the lens groups 43a and 44a of the one lens device 91a, the female screw member 94 is provided via the pin members 92a and 93a, respectively.
a and 95a are connected. Female screw members 94a, 95
The feed screws 96a and 97a are screwed into the
6a and 97a are connected to motors 100a and 101a equipped with potentiometers 98a and 99a. These motors 100a and 101a and potentiometer 98
Reference numerals a and 99a are connected to the motor control units 102a and 103a, and the motor control units 102a and 103a are connected to the zoom position calculation means 104. A locus data storage unit 105 that stores the positional relationship of the lens groups 43a and 44a for each zoom, that is, the zoom locus, in the computing unit 104.
And the zoom mutual difference correction means 54 are connected.

Also in this embodiment, the relationship between the rotation angle of the mechanical cam 48b of the lens device 91b and the zoom is measured in advance and the data is stored in the correction data storage section 55, but an electronic cam is further used. The relationship between the positions of the lens groups 43a and 44a of the lens device 91a and the zoom is measured, and the data is stored in the locus data storage unit 105.

With such a configuration, the zoom control means 5
When the zoom command is sent to the zoom mutual difference correction means 54 from the lens 6, the correction data storage section 55 causes the lens device 49b.
The cam rotation angle of the mechanical cam 48b of the motor controller 5 is
3b, and the mechanical cam 48 is driven by the motor 51b.
b rotates and the lens devices 43b and 44b move to predetermined positions. At the same time, a zoom instruction is sent from the zoom mutual difference correction means 54 to the zoom position calculation means 104,
The zoom position calculation means 10 is also obtained from the locus data storage unit 105.
The locus data is sent to 4. This data is sent to the motor control units 102a and 103a and the motor 100a,
101a rotates, the feed screws 96a and 97a rotate, and the lens devices 43a and 44a move to a predetermined position.

In this embodiment, the electronic cam is used for only one of the lens devices 91a, but the same effect can be obtained by using the electronic cam for both of the lens devices 91a and 91b.

[0034]

As described above, the filter device for a stereoscopic television camera according to the first aspect of the present invention can simplify the structure by symmetrically mounting the same type of filter on one filter disk, and reduce the cost. It is possible to significantly reduce the weight, the space, the number of assembling steps, and the like.

Further, since the zoom device for the stereoscopic television camera according to the second aspect of the present invention can easily correct the mutual difference in zoom and focus between the two lens devices, a good stereoscopic image can be obtained. it can.

[Brief description of drawings]

FIG. 1 is a sectional view of a first embodiment.

FIG. 2 is a side view of an optical system.

FIG. 3 is a front view.

FIG. 4 is a sectional view of a second embodiment.

FIG. 5 is a sectional view of a third embodiment.

FIG. 6 is a sectional view of a fourth embodiment.

FIG. 7 is a front view of a conventional example.

FIG. 8 is a sectional view of a conventional example.

[Explanation of symbols]

 32 filter disk 34a-34h filter 43a, 43b, 44a, 44b lens group 48a, 48b, 65a, 65b mechanical cam 54 zoom mutual difference correction means 55 correction data storage section 56 zoom change means 63a, 64a pulse motor 104 zoom position calculation means 105 locus data storage unit

Claims (4)

[Claims] 1. A filter device for a stereoscopic television camera, wherein filters of the same type are symmetrically attached to the axis of a filter disk. 2. A means for storing data for correcting a mutual difference of at least one of zoom and focus of two lens devices having a plurality of lens groups, and at least two means for moving these lens groups. A zoom device for a stereoscopic television camera, comprising a motor and a means for controlling these motors. 3. The zoom device for a stereoscopic television camera according to claim 2, wherein at least one of the lens devices has at least two means for moving the plurality of lens groups for changing zoom. 4. The zoom device for a stereoscopic television camera according to claim 3, wherein at least one of the lens devices has a unit for storing data on a positional relationship between the plurality of lens groups for changing zoom.