JP3091533B2 - Imaging device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image pickup apparatus having a plurality of optical systems for independently forming an image of a subject on an image pickup device, and more particularly to an adjustment for adjusting the relative positions of the plurality of optical systems. The present invention relates to an imaging device provided with means.

[0002]

2. Description of the Related Art An example of a conventionally used imaging device will be described below with reference to FIG. FIG. 8 is a block diagram illustrating an imaging principle of an imaging device including one optical system for photographing. This imaging apparatus includes an optical system 1, an imaging device 2 connected to the optical system 1, a signal processing unit 3 connected to the imaging device 2, and a signal output unit 4 connected to the signal processing unit 3. ing. The optical system 1 includes, in order from the subject side, a focusing lens group 5, a variable power lens group 6, a correction lens group 7, an iris (aperture) 8, and a master lens group 9.
And an optical quartz filter 10.

Light from a subject enters an optical system 1 and passes through each of the above-described lens systems to form an optical image on an image sensor 2.
Then, the light focused on the image sensor 2 is converted into an electric signal by the image sensor 2. The electric signal is output by the signal processing means 3 and the signal output means 4.

[0004]

A subject is imaged on the basis of the above-described imaging principle. When combining images captured by individual optical systems, for example, an image captured by a single focus lens and a zoom lens are used. It is convenient to use an imaging device having a plurality of optical systems for photographing when synthesizing with images captured by the optical system or when performing instantaneous switching of images captured by the individual optical systems. .
However, an imaging device including a plurality of optical systems for photographing has the following problems. FIG. 9 is an explanatory diagram schematically illustrating a state in which a subject is imaged using an imaging device including two optical systems for photographing.

In this case, the imaging apparatus includes a first optical system 11 including a zoom lens and a second optical system 12 including a single focus lens. In the figure, reference numeral 13 denotes the first optical system 1.
Reference numeral 1 denotes a photographing center, and reference numeral 14 denotes a light beam that enters the first optical system 11 from the photographing center 13. Reference numeral 15 denotes a shooting center of the second optical system 12, and 16 denotes a shooting center 15
2 shows light rays incident on the second optical system 12. Here, the photographing center is a center of a subject that can be photographed by the optical system. As shown in FIG. 9, when a subject is photographed using an imaging apparatus having a plurality of photographing optical systems, the position of the photographing center photographed by each optical system is reduced due to the positional shift of each optical system. A displacement occurs.

[0006] The displacement of the position of the photographing center is called parallax. Due to this parallax, there has been a problem that when an image captured by a plurality of optical systems is selectively and instantaneously switched to the same monitor, the viewer feels strange. In addition, there is a problem that the parallax impedes creation of a composite image.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide an image pickup apparatus capable of reducing parallax.

[0008]

SUMMARY OF THE INVENTION The imaging apparatus according to the present invention, a first for entering an optical image of a subject each independently
Optical system and second optical system, and the first optical system and
Each optical image formed by the second optical system
A first image sensor and a second image sensor that convert to
The first optical system and the second optical system that hold each of the second optical systems.
A first lens barrel and a second lens barrel, the first imaging element and
Processing means connected to each of the first and second imaging elements
The first optical system and the second optical system.
You can instantly switch the video shot by
An imaging device for generating and outputting the image data, wherein
Serial provided so as to connect them between a second barrel, the relative positional relationship between the second optical system and the first optical system, imaging center of the first optical system When the second
It includes an optical system adjusting hand stage for adjusting of the imaging center of the optical system so as to coincide. The optical system adjusting means includes a first preferably has a first arm attached to the first barrel, mounted on the second barrel, which is pivotally connected with the first arm And two arms.

[0009]

According to the present invention, with the above arrangement, each optical system is adjusted by the optical system adjusting means so that the imaging center of the first optical system coincides with the imaging center of the second optical system. Relative position can be adjusted. Thus, parallax due to positional deviation of each optical system can be reduced.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below with reference to FIGS. This imaging apparatus includes a zoom lens 21 and a single focus lens 22 with reference to FIG. An iris (aperture) 24, a zoom motor 26, an image sensor 27, a substrate 28, and a focus motor 29 are attached to the zoom lens 21.
The iris (aperture) 24 is mounted in front of the master lens group, and adjusts the amount of light incident on the master lens group. The zoom motor 26 is a drive system for driving a variable power lens group (variator) and a correction lens group (compensator). The focus motor 29 is a drive system for driving the master lens group.

The single focus lens 22 has an iris (aperture)
25, an image sensor 30 and a substrate 31 are attached. The light incident on the zoom lens 21 and the single focus lens 22 is transmitted to the image pickup device 2 attached to each of them.
7 and the image pickup device 30 to form an optical image. Then, photoelectric conversion is performed by the image sensor 27 and the image sensor 30, and incident light is output as an electric signal by signal processing means (not shown) and signal output means (not shown) connected to each. . The zoom lens 21
Is held by a lens barrel 21a, and the single focus lens 22 is held by a lens barrel 22a.

The relative position adjusting means of each lens system will be described below with reference to FIGS. 2 to 5 by using the drawings in which this embodiment is disassembled into a zoom lens 21 and a single focus lens 22. FIG. 2 shows a side view of the zoom lens 21, and FIG. 3 shows a front view of the zoom lens 21. An arm 32 and an arm 33 are fixed below the lens barrel 21a of the zoom lens 21. Arm 3
2 has a round hole 32a and a round hole 32b. The arm 33 has a round hole 33a.

Referring to FIGS. 4 and 5, an arm 34 and an arm 35 are fixed above the lens barrel 22a of the single focus lens 22. The arm 34 has a protrusion 34a at a position corresponding to the round hole 32a. In the arm 34, a female screw portion 34b that can be screwed is provided at a position corresponding to the round hole 32b. The arm 35 is provided with a female thread 35a at a position corresponding to the round hole 33a.

The zoom lens 21 having the above structure and the single focus lens 22 are engaged. First, the protrusion 34a of the arm 34 provided on the single focus lens 22 is fitted into the round hole 32a provided on the arm 32 of the zoom lens 21. Thereby, with respect to the zoom lens 21,
The single focus lens 22 can be rotated with the round hole 32a and the protrusion 34a as fulcrums. Then, the relative position between the single focus lens 22 and the zoom lens 21 is selected by rotating the single focus lens 22. Thereafter, the round hole 32b and the female screw portion 34b and the round hole 33a and the female screw portion 3
The single focus lens 22 is fixed to the zoom lens 21 by fastening 5 a using a screw 23. At this time, the hole diameters of the round hole 32b and the round hole 33a are considerably larger than the screw diameter.

FIG. 6 is a partially enlarged view showing a state where the relative position between the zoom lens 21 and the single focus lens 22 is adjusted. At this time, since the hole diameters of the round holes 32b and 33a are considerably larger than the screw diameter, the position of the single focus lens 22 can be adjusted with the protrusion 34a fitted into the round hole 32a as a fulcrum. FIG. 7 shows a state where the relative position between the zoom lens 21 and the single focus lens 22 is adjusted so that the shooting center 36 of the zoom lens 21 and the shooting center 37 of the single focus lens 22 match. In the figure, 38
Denotes a light beam entering the zoom lens 21 from the shooting center of the subject, and 39 denotes a light beam entering the single focus lens 22 from the shooting center of the subject.

By adjusting as described above, parallax due to the arrangement of the lens system can be significantly reduced. In the above-described embodiment, the holes 32b and 33a provided in the arm portion have a round shape, but have a quadrangular shape, have substantially the same curvature as an arc centered on the round hole 32a, and extend in the longitudinal direction. It may be a shape or the like. Further, in the above embodiment, after adjusting the position of the single focus lens 22 with respect to the zoom lens 21, the zoom lens 21 and the single focus lens 22 are fixed, but after the relative positions of the respective lens systems are determined. Alternatively, the lens system may be fixed to the imaging device body. Also, the lens system was arranged up and down,
A plurality may be arranged in a horizontal direction or an oblique direction. Further, although the zoom lens 21 and the single focus lens 22 are combined, other lens systems may be combined.

Next, a parallax adjustment method using an image pickup apparatus having the above structure will be described more specifically.

Zoom lens 21 and single focus lens 22
The imaging device is connected to the monitor so that the image obtained by the method can be displayed on the same monitor. Thereafter, a subject is selected and the subject is set at a predetermined position. Then, the image from the zoom lens 21 is projected on a monitor, and a mark is placed at the center of the monitor screen (hereinafter, referred to as “center of monitor”). next,
The subject and the zoom lens 21 are adjusted so that the center of the monitor matches the center of the subject. At this time, the zoom lens is set at the telephoto end (telephoto end). TEL
This is because the center of the subject can be easily understood when the position is at the E end.

Next, the screen of the monitor is switched, and the image of the single focus lens 22 is displayed on the monitor. Then, the position of the single focus lens 22 is adjusted using the above-described method so that the center of the subject in the image of the single focus lens 21 matches the mark of the monitor center. As described above, by using the imaging device of this embodiment, the imaging centers captured by the plurality of imaging optical systems of the imaging device can be easily matched.

[0020]

According to the present invention, parallax generated in the optical system can be significantly reduced. This makes it possible to remarkably reduce the sense of discomfort given to the viewer when the image is instantaneously switched using an imaging apparatus having a plurality of optical systems for photographing.

[Brief description of the drawings]

FIG. 1 is a side view of an imaging apparatus according to an embodiment of the present invention.

FIG. 2 is a side view of a zoom lens of the imaging apparatus shown in FIG.

FIG. 3 is a front view of the zoom lens shown in FIG. 2;

FIG. 4 is a side view of a single focus lens of the imaging apparatus shown in FIG.

FIG. 5 is a front view of the single focus lens shown in FIG. 4;

6 is a partially enlarged view of an arm fastening portion of the imaging device shown in FIG.

FIG. 7 is a diagram illustrating a state in which the relative position of the optical system is adjusted so that the respective photographing centers coincide with each other in the imaging apparatus illustrated in FIG. 1;

FIG. 8 is a block diagram illustrating an imaging principle when a conventional imaging device is used.

FIG. 9 is an explanatory diagram schematically showing a state in which parallax occurs in an image pickup apparatus including a plurality of optical systems for independently forming an image of a subject on an image pickup device.

[Explanation of symbols]

 Reference Signs List 21 Zoom lens 22 Single focus lens 21a, 22a Lens barrel 32, 33, 34, 35 Arm 32a, 32b, 33a Round hole 34a Projection 34b, 35a Female thread 27, 30 Image sensor

Claims (2)

(57) [Claims] 1. An optical image of a subject is independently inputted.
Optical system and a second optical system, and an image formed by the first optical system and the second optical system.
A first image sensor for converting each optical image into an electrical signal, and
Holding a second image sensor and each of the first optical system and the second optical system
A first lens barrel and a second lens barrel, and the first image sensor and the second image sensor, respectively.
Signal processing means connected to the first optical system and the second optical system.
Instantly switch or combine and output video shot
An imaging device that is provided between the first lens barrel and the second lens barrel so as to connect them, and a relative position between the first optical system and the second optical system. wherein Do positional relationship, the imaging center of the first optical system, in that it comprises an optical system adjusting means for adjusting so as to coincide with the imaging center of the second optical system
Imaging device according to. Wherein said optical system adjusting means comprises a first arm attached to the first barrel, mounted on the second barrel, is linked to the first arm and the pivot And a second arm .
The imaging device according to claim 1, wherein