JPH11215485A - Image-pickup device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To readily mount an image-pickup device on an existing door scope and to attain an easy to see image. SOLUTION: A case 26 contains a CCD 20, a telescopic lens 21, a liquid crystal display 22, and a battery 25. The case 26 is fixed onto a door 2 by an adhesive or a double-sided tape, while a recessed part 27 at a rear side of the case 20 is in matching with an end 3a of a door scope 1 so that a wide angle lens of the door scope 1 and the telescopic lens 21 are aligned on a same optical axis. Thus, the image-pickup device captures a scene at the outside of the door through the existing door scope and a display device displays the scene, thus a user can view the outside without coming close to the door. Furthermore, an optical system, in combination with the wide angle lens and the telescopic lens 21, is adopted to obtain an image without the sense of incongruity of being different from an image seen through the door scope.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a peephole with a lens provided on a door, a wall, and the like for separating indoors and outdoors of a building such as an existing condominium, apartment house, detached house, office, and warehouse. For example, the present invention relates to an imaging device that displays an image of a visitor from indoors.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 6, a divergent lens element (hereinafter referred to as a door scope) 1 is formed on a door 2 of a house so that a wide field of view can be seen with the naked eye. It is screwed into the viewing hole 3 and assembled. Although not shown, the door scope 1 has a diverging system wide-angle lens (diverging lens), and is installed in many doors 2 because it is small and inexpensive.

[0003] However, the wide-angle lens used for this purpose has a very short exit pupil, so it is necessary to look into the door scope 1 to see an external visitor, and who is the visitor quickly. Can not judge. In addition, in the case of a visitor who does not expect, he does not want to be informed that he is in the house, but when he approaches the door 2, he knows he is in the house.

In order to improve such a situation, as shown in FIG. 7, a dedicated converging wide-angle lens 4, a CCD 5, a liquid crystal display or a CRT adapted to the size of the observation hole 3.
There is proposed an imaging apparatus which is provided with a monitor 6 such as the above so that an image of a visitor can be viewed on the monitor 6 even from a position slightly away from the door 2. In the figure, 7 is CCD5,
A mounting board on which a control circuit and the like are mounted, 8 is a battery, 9 is a start button, 10 is a case, and 11 is a mounting frame for fixing a lens.

[0005] This is to remove the existing door scope,
A special wide-angle lens 4 is installed in the peephole 3 of the door 2,
Mounting frame 1 mounted on case 10 containing CCD 5 and the like
1 is screwed into the tip of the wide-angle lens 3 protruding indoors, and is fixed so as to sandwich the door 2.

Then, when the start button 9 is pressed, the CC
D5, the control circuit and the like are energized, the subject image from the dedicated lens 4 is picked up by the CCD 5, and the image is output to the monitor 6. In addition, a battery 8 is installed inside the case 10 as a power source to eliminate wiring.

As described above, by removing the existing door scope and installing an image pickup device equipped with a dedicated wide-angle lens, visitors can be seen without looking into the door scope as in a conventional door scope. .

[0008]

However, when a general user attaches the above-described apparatus by himself, it is difficult to understand how to remove the existing door scope, and it is difficult to attach the door scope. Furthermore, there are various opening diameters of the peep holes, so that they may not be attached properly, and as a result, the appearance may be impaired.

[0009] Therefore, there is disclosed in Japanese Utility Model Registration No. 3001552 an imaging device in which a CCD, a monitor, and a power supply can be integrated and directly attached to the door scope without removing the existing door scope.

However, in this apparatus, since a light beam coming through the wide-angle lens of the door scope is directly imaged on the CCD, an image with a distorted periphery is obtained, and it is very difficult to see.
In addition, if the CCD is displaced from the optical axis of the wide-angle lens, the image is blurred, and there is a possibility that the visitor cannot be identified. That is, the original monitoring function of the device cannot be sufficiently exhibited.

In view of the above, it is an object of the present invention to provide an image pickup apparatus which can be easily attached to an existing door scope by a simple method without removing the existing door scope and can obtain a clear image.

[0012]

An object of the present invention is to provide an image pickup apparatus which is attached to a partition such as a door or a wall having a peephole (door scope) with a diverging lens body. A telephoto lens (convergent lens) for forming an image of a light beam incident through a wide-angle lens (divergent lens) on an image pickup device, and a display device for displaying an image from the image pickup device. They are arranged on the same optical axis.

[0013] According to this, the scene outside the door can be captured by the image pickup device through the existing door scope and displayed on the display, so that the outside can be seen without approaching the door. In addition, by using an optical system in which a wide-angle lens and a telephoto lens are combined, an image that is different from an image viewed through a door scope and that does not cause any discomfort can be obtained.

[0014] The imaging device, the telephoto lens and the display are housed in a housing, and the housing is fixed to a door. As a fixing method, if the contact portion of the housing facing the flat portion of the door is made flat, it can be attached using an adhesive or a double-sided tape. Further, the housing may be provided with an engaged body that engages with the engaging body of the door, and the two may be hooked and engaged. Furthermore,
It can also be attached by providing an adsorbent such as a magnet and a suction cup in the housing, and adsorbing the housing to the door.
As described above, the present apparatus can be easily attached without removing the door scope.

The telephoto lens can be easily mounted as described above. However, if there is an error in assembling each component or a variation in the focal length of the telephoto lens, or if there is a positional shift at the time of mounting because anyone can mount the telephoto lens, the telephoto lens cannot be mounted. The image may be blurred due to a shift in the focal length. Therefore, it is preferable to provide an adjusting means for adjusting the focal length of the telephoto lens by moving the lens barrel so that the lens barrel holding the telephoto lens is movable in the optical axis direction. Thereby, the focus can be easily adjusted with the housing attached to the door, and a clear image can be obtained.

When mounting, the ends of the door scope are protruded, and this is used to align the optical axes of both lenses. That is, the housing is provided with a guide portion such as a dent that engages with this end. Thus, the displacement of the optical axis can be easily set within a range that does not hinder practical use only by mounting the housing with the guide section positioned at the end of the door scope. In addition, it is possible to prevent the end from interfering with the housing at the time of attachment.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An image pickup apparatus according to an embodiment of the present invention which can be attached to an existing door scope will be described with reference to the drawings. As shown in FIGS. 1 and 2, the image pickup apparatus includes a CCD 20 as an image pickup device, a telephoto lens (convergent lens) 21 that forms an image of a light beam incident through a wide-angle lens (divergent lens) of the door scope 1 on the CCD 20, CCD2
A liquid crystal display 22 as a display for displaying an image from 0, a mounting board 23 on which a CCD 20, a control circuit and the like are mounted, and a start button 24 for activating the CCD 20
, A CCD 20, a liquid crystal display 22, and a battery 25 for supplying power to the control circuit. These are housed in a housing 26 and are unitized.

A small television camera may be used instead of the CCD 20, and a cathode ray tube may be used instead of the liquid crystal display 22. Further, a primary battery and a solar battery are used as the battery 25.

The housing 26 is formed in a box shape, and the liquid crystal display 22 is arranged on the front side so that the user can see the outside without coming into the vicinity of the door 2 and looking into the outside. Are located. Housing 26
A battery 25 is arranged in the lower part of the inside, and has a structure in which the lower part or the lower part on the front side of the housing 26 can be opened so as to be replaceable. By providing a remote control receiver in place of the start button 24, remote control can be performed using a transmitter.

The rear side of the housing 26 is flattened because it faces the door 2, and the end 3a of the door scope 1 projects a little toward the room. A recess 27 having a diameter slightly larger than the diameter of the scope 1 is formed. Furthermore, in this recess 27,
A circular opening 28 through which the incident light passes is formed, and the telephoto lens 21 is arranged on the same optical axis as the wide-angle lens in close proximity to the opening.

To fix the housing 26 in close contact with the door 2, fixing portions 29 are provided at the four corners on the back side of the housing 26, and the housing 26 is fixed to the door 2 with an adhesive or a double-sided tape. ing. In addition, on the back side of the housing 26, only the fixing portion 29 that directly contacts the door 2 may be a flat surface, and the other portions need not be flat.

At this time, by positioning the recess 27 on the back side in accordance with the end 3a of the door scope 1, the optical axis can be aligned to a degree that does not hinder practical use. By making the effective image circle of the telephoto lens 21 large, even if there is a slight optical axis shift, moire or the like can be prevented from being generated on the screen. That is, the recess 27 functions as a guide for aligning the optical axes of the telephoto lens 21 and the wide-angle lens. Moreover, when the housing 26 is brought into close contact with the door 2, the end 3a of the door scope 1 does not interfere.

The telephoto lens 21 is held by a lens barrel 30.
The lens barrel 30 is screwed and supported by a fixed barrel 31 fixed to the mounting substrate 23, and is rotatable and movable in the optical axis direction.

Here, the housing 26 is fixed to the door 2. At this time, the focal length error of the telephoto lens 21 and the housing 2
6 and the CCD 20 may cause variations in accuracy. Since the telephoto lens 21 has a shallow depth of field, the above-described variation causes an image to be blurred. In order to correct this, an adjusting means for adjusting the focal length of the telephoto lens 21 is provided.

As this means, a gear 3 is provided on the outer periphery of the lens barrel 30.
2 is fitted, and an adjustment gear 33 meshed with the gear 32
Is provided. The adjustment gear 33 is rotatably supported by the housing 26 via a shaft 34, and an upper portion of the adjustment gear 33 projects outside from the upper side of the housing 26. Therefore, by rotating the upper part of the adjustment gear 33, focus adjustment can be easily performed only by operating from the outside after the housing 26 is fixed.

As another adjusting means, the lens barrel 30 is fixed
1 is slidably inserted, a lever is attached to the lens barrel 30, and a groove is formed on the upper side of the housing 26 so that the lever can be moved in the optical axis direction. In this case, similarly, the telephoto lens 21 can be moved only by operating the lever, and the focus can be easily adjusted.

In the above-described imaging apparatus, for example, when there is a visitor, the start button 24 is pressed to activate the apparatus. Then
The light incident from the outside of the door 2 passes through the wide-angle lens, becomes parallel light, reaches the telephoto lens 21, and the incident light is converged by the telephoto lens 21 to form an image on the CCD 20. The control circuit performs video signal processing, outputs a video signal to the liquid crystal display 22, and a visitor is displayed on the screen.
By pressing the start button 24 again, the power supply is cut off and stopped. Therefore, when approaching door 2,
Even if you do not look into it, visitors can be aware of the outside situation without being noticed by the visitor, and in some cases it is very convenient for insiders.

When the wide-angle lens of the existing door scope 1 is used as it is, the incident light is directly transmitted from this wide-angle lens to C.
When an image is formed on the CD 20, only a very distorted image with a distorted periphery can be obtained. Image. Therefore, the image becomes the same as the scene seen by the human eye, and can be seen without any uncomfortable feeling. Therefore,
It is only necessary to attach the present imaging device without removing the doorscope 1, and troublesome construction is not required, and it can be easily retrofitted.

Next, a method of attaching the housing 26 to the door 2 according to another embodiment is shown in FIG. When the door 2 is made of iron, as shown in FIG. 3A, if the magnets 35 are embedded in the four corners on the back side of the housing 26, the housing 26 can be attracted to the door 2 using magnetic force. Alternatively, FIG.
As shown in (b), when the suction cup 36 is fixed to the rear side of the housing 26 so as to face the flat surface of the door 2, by pressing the suction cup 36 against the door 2, the space between the door 2 and the suction cup 36 is increased. The housing 26 can be adsorbed to the door 2 in a vacuum state. As described above, the imaging apparatus can be easily attached to the door 2 by any method.

FIG. 4 shows another method. here,
A fixing bracket 37 is interposed between the door 2 and the housing 26. Then, a part of the fixing bracket 37 is cut and raised, and bent upward to form the engaging body 38. A corner 37a of the fixing bracket 37 is fixed to the door 2 with an adhesive, a double-sided tape or a screw. A hole 39 facing the door scope 1 is formed in the center of the fixing bracket 37. On the other hand, an engaged body 40 bent downward is formed on the back side of the housing 26.

By hooking the engaged body 40 of the housing 26 on the engaging body 38 of the fixing bracket 37, the housing 26
Attached to In this case, the housing 26 is the door 2
The battery 25 can be easily detached, and maintenance such as replacement of the battery 25 becomes easy. Moreover, by forming the fixing bracket 37 into a shape conforming to the planar shape of the door 2, the present imaging apparatus can be attached to the door 2 even when the door 2 has irregularities.

It should be noted that the present invention is not limited to the above-described embodiment, and it goes without saying that many modifications and changes can be made to the above-described embodiment within the scope of the present invention. In the present embodiment, the present invention is applied to a door scope of a door, but may be attached to a wall of a building or a wall of a large container that requires a peephole, such as a door scope.

As shown in FIG. 5, the image pickup apparatus A may be connected to the indoor unit 41 of the door phone B so as to be linked with the door phone B. That is, when a visitor comes and operates the outdoor unit 42 of the door phone B, a driving signal is simultaneously output from the indoor unit 41 to the imaging device A, and the CCD 20 is activated to control the image to be displayed. In this case, the indoor unit 41
If the display 43 is also installed, the outside state can be known without going to the door 2. If the power is supplied from the indoor unit 41, the battery 2
5 need not be provided, and downsizing can be achieved.

[0034]

As is apparent from the above description, according to the present invention, a telescope lens is combined with an existing door scope using a wide-angle lens so as to be on the same optical axis, so that the light enters from the door scope. Since the reflected light can be imaged on the image pickup device, when the image is displayed on the display device as an image, the outside state can be easily known from a place away from the door.

Therefore, it is not necessary to remove the doorscope and replace it with a wide-angle lens to constitute an optical system as in the conventional case, and it is possible to obtain an image through an image pickup device by retrofitting the existing doorscope. . Moreover, since the image is obtained by composing the optical system by combining the wide-angle lens and the telephoto lens, the image can be easily viewed without a sense of incongruity.

Further, since a mechanism for moving the telephoto lens in the direction of the optical axis is provided, even if there is a variation in component accuracy or mounting accuracy, the telephoto lens can be moved to easily focus on the door. Adjustments can be made and clear images can be obtained.

Since the imaging device, the telephoto lens, and the display device are housed in the housing, the housing may be mounted on the door, and the mounting work becomes very easy. Therefore, there is no need to remove and wire the existing door scope, and a general user can mount the door scope. In addition, when the housing is fixed, the housing can be mounted using a simple operation such as mounting using an adhesive, a double-sided tape, a magnet, or the like, and the work can be easily performed.

At this time, since the end of the door scope protrudes from the door, a guide portion is provided on the housing so that the guide can be used as a reference when aligning the optical axes of the telephoto lens and the wide-angle lens. The optical axes of both lenses can be easily made coincident only by attaching them to the ends with their positions adjusted. In addition, since the guide portion is recessed according to the protruding end portion, it is possible to prevent the door scope from obstructing when the housing is attached to the door.

[Brief description of the drawings]

FIG. 1 is a diagram showing an internal configuration of an imaging apparatus according to an embodiment of the present invention.

2A is a front view of a housing, and FIG. 2B is a rear view of the housing.

FIG. 3A is a side view of a housing attached using a magnet, and FIG. 3B is a side view of a housing attached using a suction cup.

FIG. 4A is a side view of a housing to be attached by using a fixing bracket, and FIG. 4B is a front view of the fixing bracket.

FIG. 5 is a configuration diagram when an intercom is combined with an imaging device.

FIG. 6 shows a door scope.

FIG. 7 is a diagram showing a conventional imaging device.

[Explanation of symbols]

 Reference Signs List 1 door scope 2 door 3 peephole 20 CCD 21 telephoto lens 22 liquid crystal display 23 mounting board 24 start button 25 battery 26 housing 27 recess 30 lens barrel 32 gear 33 adjustment gear

Claims (6)

[Claims] 1. An imaging device attached to a partition having a viewing hole with a diverging lens body, comprising: an imaging device; a converging lens configured to form a light beam incident through the diverging lens on the imaging device; An imaging apparatus, comprising: a display for displaying an image from an imaging device; wherein the converging lens and the diverging lens are arranged on the same optical axis. 2. A lens barrel for holding a converging lens, the lens barrel being movable in the optical axis direction, and an adjusting means for adjusting the focal length of the converging lens by moving the lens barrel is provided. The imaging device according to claim 1. 3. An image pickup device, a converging lens, and a display are housed in a housing, and are connected to an end of a diverging lens body protruding from a partition to adjust the optical axes of the converging lens and the diverging lens. The imaging device according to claim 1, further comprising a guide unit that matches. 4. The imaging device according to claim 1, wherein the imaging device, the converging lens, and the display device are housed in a housing, and a contact portion of the housing facing a flat portion of the partition is flat. apparatus. 5. An image pickup device, a convergent lens, and a display device are housed in a housing, and the housing is provided with an engaged body that engages with an engaging body provided on a partition.
Or the imaging device according to 2. 6. An image pickup device, a converging lens, and a display device are housed in a housing, and an adsorbent for adsorbing to the partition is provided in the housing for fixing the housing to the partition. The imaging device according to claim 1.