JPH10210328A - Dark part image-pickup device and dark part image-pickup system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dark part image-pickup device that can pick up sharply and quickly an optional part in a narrow dark part, such as oral cavity as a horizontal erected image with a same camera angle naturally in addition to consecutive shots. SOLUTION: A lighting light 3 that lights a front side of a lens 2A and a holder ring 4 that is turned around an optical axis of the lens 2A to be stopped at an optional position are provided, in addition to a CCD camera 2 and a dental mirror 5 is removably mounted to the holder ring 4 in a state facing a mirror 5A on the optical axis of the lens 2A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dark-section photographing apparatus and a dark-section photographing system, and more particularly to close-up photographing as well as a horizontal erect image of the same camera angle at any point in a narrow dark section such as the oral cavity. The present invention relates to a dark-section photographing apparatus capable of photographing clearly and quickly as well as a dark-section photographing system capable of adding character information to a photographed image and printing out or displaying the image on a monitor screen.

[0002]

2. Description of the Related Art Conventionally, a medical camera provided with a ring-shaped lighting device has been used for photographing a dental row or a dental treatment in an oral cavity in dental care or the like. However, in order to photograph a dentition or a treated tooth with a medical camera, the photographer had to hold a dental mirror in one hand and photograph with a medical camera in one hand, which required extremely sophisticated photographing techniques.
In addition, since a medical camera cannot obtain a print image in real time, there are many difficulties in photographing. In order to solve these problems, an intraoral camera system mainly using a CCD camera has been developed.

[0003] The intraoral camera system is a system in which an intraoral dentition or a treatment tooth is photographed by a CCD camera, the image is displayed on a monitor television in real time, and can be printed out from a video printer. . As a CCD camera, a so-called pen-type CCD camera in which a CCD and an optical fiber for illumination are incorporated at the tip of a main body that can be inserted into the oral cavity, a ring-shaped illuminating tool and a circular dental mirror in a cylindrical main body A so-called thumb CCD camera or the like equipped with a camera is known.

[0004]

However, since the pen-type CCD camera described above is configured to illuminate via an optical fiber, a clear image cannot be obtained in panoramic photographing of a tooth row due to insufficient light quantity. There's a problem.
In addition, because the field of view is narrow, it is practically impossible to obtain a directly facing image of the entire dentition. On the other hand, in the thumb CCD camera, since the relative position between the camera body and the dental mirror is fixed, when the dental mirror is rotated around the optical axis according to the treatment tooth to be photographed, the camera body also rotates together. As a result, the image displayed on the monitor television rotates, and it is not possible to obtain a horizontal erect image at the same camera angle.

In addition, since the intraoral camera system using such a CCD camera has a configuration in which an image signal is simply output from the CCD camera to a video printer and a monitor television, the imaging date, patient name, tooth type, etc. Character information cannot be added.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object not only close-up photography, but also as an erect horizontal image of the same camera angle at any point in a narrow dark area such as the oral cavity. It is an object of the present invention to provide a dark part photographing apparatus capable of photographing clearly and quickly, and a dark part photographing system capable of adding character information to the photographed image and printing it out or displaying it on a monitor screen.

[0007]

As a means for achieving the above-mentioned object, a dark-section photographing apparatus according to the present invention is a dark-section photographing apparatus mainly composed of a CCD camera.
The camera is provided with an illuminating lamp capable of illuminating the front of the lens and a holder ring which can be rotated around the optical axis of the lens and stopped at an arbitrary position. The mirror holder is removably mounted with the mirror facing.

Further, the dark part photographing system according to the present invention comprises:
A dark section photographing device mainly composed of a CCD camera;
A video titler for inputting an image signal from a CCD camera and adding character information, wherein the image signal to which the character information is added by the video titler can be output to a video printer or a monitor television. .

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a configuration of a dark part photographing apparatus and a dark part photographing system according to the present invention. 1 is an exploded perspective view of the dark part photographing apparatus, FIG. 2 is a side view showing the dark part photographing apparatus as a partial cross section, FIG. 3 is a perspective view showing a different example of a mirror mounted on the dark part photographing apparatus, and FIG.
Is a perspective view showing the overall configuration of the dark part imaging system, and FIG. 5 is a block diagram showing a signal transmission path of the dark part imaging system.

As shown in FIGS. 1 and 2, a concave / dark portion photographing apparatus (1) according to the present invention mainly comprises a CCD camera (2) having an autofocus function. The CCD camera (2) includes an illumination lamp (3) that can illuminate the front of the lens (2A), and a holder ring (4) that can rotate around the optical axis of the lens (2A) and stop at an arbitrary position. And are attached. The lens (2) is attached to the holder ring (4).
The mirror holder (5B) of the dental mirror (5) is detachably mounted with the mirror (5A) facing the optical axis of (A).

The CCD camera (2) includes an optical system that separates the color light of the subject into light of three primary colors of red, green, and blue (hereinafter abbreviated as RGB), and an optical system that separates the separated RGB light. A CCD image pickup device for photoelectrically converting to an electric signal is incorporated. The RGB signals photoelectrically converted by the CCD image pickup device are digitally converted and output to the video titler (11) as color image signals.

The CCD camera (2) has a button (2)
A storage device for storing the image of the subject as a still image by the operation of B) is incorporated. In addition, CCD camera (2)
Is a zoom lens having a lens (2A) of about 10 times, which is activated by operating buttons (2C) and (2D).
It has a digital zoom function of about 0 to 20 times. This CCD camera (2) has a function of switching from auto focus to manual focus.

The illumination lamp (3) is formed in a short-axis cylindrical shape, mounted on the outer periphery of the lens holder (2E), and extends from the ring-shaped light projecting surface (3A) to the front including the optical axis of the lens (2A). Illuminate almost uniformly.

On the inner periphery of the holder ring (4), an adapter ring (6) which is loosely fitted on the outer periphery of the illumination lamp (3) is mounted so as to be relatively rotatable with a predetermined sliding resistance. A plurality of leaf springs (not shown) whose intermediate portion is curved and bulges inward are mounted on the adapter ring (6) at substantially equal intervals in the circumferential direction. Then, the curved portion of each leaf spring is pressed against the outer periphery of the illumination lamp (3) with a predetermined elastic force, so that the adapter ring (6) is detachably mounted on the outer periphery of the illumination lamp (3), and the holder is provided. The ring (4) is configured to be able to rotate around the optical axis of the lens (2A) and stop at an arbitrary position.

At the front surface of the holder ring (4), for example, four mounting holes (4A) into which the base end of the mirror holder (5B) is inserted are opened at equal intervals in the circumferential direction. Each mounting hole (4A) is provided so that the mirror (5A) mounted on the tip of the mirror holder (5B) faces the optical axis of the lens (2A) and is oblique to the optical axis at a predetermined angle. It is formed inclined with respect to the axis. Although not shown, the mirror holder (5) inserted into the mounting hole (4A) has an intermediate portion of a leaf spring that is curved and swells inside the mounting hole (4A).
B) is configured to be pressed against the base end portion with a predetermined elastic force and to be detachably mounted.

The mirror (5A) shown in FIG. 1 and FIG.
This is a large wide mirror used for examining upper and lower jaw teeth of general adults in dental care and the like. This mirror (5
A) is a stainless steel metal mirror whose surface is mirror polished, and a clear mirror image can be obtained by surface reflection. Such a mirror (5A) is bent into a U-shaped cross section, and its base end is detachably clamped by a leaf spring clamper (5D) rotatably pivotally attached to the tip of a rod (5C). . The mirror (5A) is detachably mounted on the mirror holder (7) by detachably screwing the base end of the rod (5C) into a screw hole formed at the distal end of the mirror holder (7). Is done.

At the tip of the mirror holder (5B), an elliptical mirror (5E) integrated with a rod (5C) as shown in FIG. 3 (a) or as shown in FIG. 3 (b). Various dental mirrors such as a circular mirror (5F) integrated with the rod (5C) can be mounted.

The dark part photographing apparatus (1) configured as described above.
Together with a video titler to be described later constitute a dark area photographing system of the present invention. As shown in FIG. 4 and FIG. 5, a dark part photographing system (10) according to the present invention includes a dark part photographing device (1) mainly composed of the CCD camera (2),
A video titler (11) for inputting an image signal from the CCD camera (2) and adding character information; and outputting the image signal added with the character information by the video titler (11) to a video printer (12) or a monitor television (11). 13).

The video titler (11) is configured so that character information such as Japanese, alphanumeric characters and symbols can be added to a color image signal by key touch input and pen touch input. The video printer (12) is provided with a foot switch (14) for remote control operation.
A color still image to which character information is added by the video titler (11) can be printed out by operating the foot. Further, the monitor television (13) can input a video signal from the video titler (11) via the video printer (12) to display a color still image or video to which character information is added. It is configured.

As shown in FIG. 4, a dark section photographing system (10) comprising a dark section photographing device (1), a video titler (11), a video printer (12), and a monitor television (13).
Is an exclusive anti-bacterial rack with casters (1
5) and is configured to be movable. In addition, it is preferable that antibacterial coating is also applied to each component of the dark part imaging system (10).

The dark part photographing apparatus (1) and the dark part photographing system (10) of the present invention, for example, display in real time a photographed image of an intraoral dentition or a treated tooth as informed consent means in dental care. It is also used to print out.

When photographing a dental row or a treatment tooth in the oral cavity, a dental mirror (5) is attached to the holder ring (4) of the dark section photographing device (1) as shown in FIG. ) Is inserted into the patient's mouth. When the illumination lamp (3) is turned on, the inside of the oral cavity is illuminated.
In this state, a mirror image of the oral cavity reflected by the mirror (5A) is clearly photographed by the CCD camera (2) having the autofocus function, and is displayed as an image on the monitor television (13). Therefore, the CCD camera (2) is held so that the image becomes a horizontal erect image, and the dental mirror (5) is rotated together with the holder ring (4) around the optical axis of the lens (2A) to thereby form a tooth as a subject. The rows and the treated teeth are displayed on the monitor television (13).

In the above-mentioned intraoral radiography, the dental mirror (5) is rotated 180 degrees around the optical axis to be the upper and lower target positions, so that the view of the occlusal surface on the lingual side and the palate side of the dentition can be horizontally erect. Images can be taken. Similarly,
By rotating the dental mirror (5) about the optical axis by 180 degrees to set the left and right target positions, it is possible to capture a horizontal erect image of the buccal side view of the molars on the left and right sides of the dentition. In addition, the dental mirror (5) is detached from the holder ring (4) and a close-up photograph is taken for the front view of the dentition. In addition, by replacing the mirror (5A) of the dental mirror (5) with an appropriate mirror (5E), (5F) or the like as shown in FIG. In addition, various horizontal erect images magnified on the back side can be photographed.

The image captured by the CCD camera (2) can be obtained by operating the button (2B) or the foot switch (1).
By the operation of 4), the monitor TV (1) is output as a still image.
Displayed in 3). So, video titler (11)
By the tooth type corresponding to the still image, patient name, shooting date,
Enter text information such as the doctor in charge. Since this character information is displayed on the monitor television (13), after confirming this, the foot switch (14) is operated to print out a color still image to which the character information is added by the video printer (12). I do.

As described above, the dark part photographing apparatus (1) of the present invention
According to the dark part photographing system (10), an arbitrary portion in the oral cavity can be clearly photographed as a horizontal erect image at the same camera angle, and predetermined photograph information is added to the photographed image and printed out. I can do it. Therefore, for example, in orthodontics and esthetic dentistry, it is possible to accurately compare and examine the dentition before and after one week or more based on the photographed image.

The CCD camera (2) has an autofocus function, and has a lens (2A) and a mirror (5).
Since the distance to A) is constant, the inside of the oral cavity can be quickly and clearly photographed, and the burden on the patient can be reduced.

The mirror (5A) is a mirror holder (5B)
The mirror holder (5B) is detachable from the holder ring (4), so that the dental mirror (5) can be easily sterilized and disinfected. Therefore, it is suitable for a wide range of dental care such as general dentistry, orthodontics, and esthetic dentistry.

Of course, the dark part photographing apparatus (1) and the dark part photographing system (10) of the present invention can be applied not only to dental care but also to oral medicine and otorhinolaryngology.

Further, the dark-section photographing apparatus (1) and the dark-section photographing system (10) of the present invention are used for inspecting and maintaining aircraft, railway vehicles, automobiles, factory facilities, nuclear power plants, and the like. It can also be used to capture dark areas. In this case, the mirror holder (5B) of the dark part photographing device (1) can be a telescopic telescopic type that can be extended and contracted, and the illumination lamp (3) can be a beam light that projects toward the mirror (5A). It is preferable that a small liquid crystal monitor is attached to the CCD camera (2).

[0030]

As described above, according to the dark portion photographing apparatus of the present invention, the holder ring is turned around the optical axis of the lens and stopped at an arbitrary turning position, thereby facing the optical axis. Since the mirror can be stopped at any rotational position around the optical axis, and the lighting of the illumination lamp can illuminate the front of the lens and the shooting location reflected on the mirror,
An arbitrary portion of the narrow concave / dark portion can be clearly photographed as a horizontal erect image at the same camera angle. Further, since the distance between the lens and the mirror is constant, it is possible to take a picture quickly. Further, by removing the mirror holder from the holder ring, close-up photography with a wide field of view can be performed.

On the other hand, according to the dark part photographing system of the present invention, since the image signal from the CCD camera is output to the video printer or the monitor television via the video titler, predetermined character information such as the photographing date is added. Still images can be printed out or displayed on a monitor screen.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a dark part photographing apparatus according to the present invention.

FIG. 2 is a side view showing a dark section photographing device as a partial cross section.

FIG. 3 is a perspective view showing a different example of a mirror mounted on the dark section photographing apparatus.

FIG. 4 is a perspective view showing the overall configuration of a dark part photographing system.

FIG. 5 is a block diagram illustrating a signal transmission path of the dark part imaging system.

[Explanation of symbols]

 1: dark area photographing device 2: CCD camera 2A: lens 2B: button 2C: button 2D: button 2E: lens holder 3: illumination light 3A: light emitting surface 4: holder ring 4A: mounting hole 5: dental mirror 5A: mirror 5B ： Mirror holder 5C ： Rod 5D ： Clamper 6 ： Adapter ring 10 ： Dark section photographing system 11 ： Video titler 12 ： Video printer 13 ： Monitor TV 14 ： Foot switch 15 ： Rack with casters

Claims (2)

[Claims] 1. A dark area photographing apparatus mainly comprising a CCD camera, wherein said CCD camera has an illumination lamp capable of illuminating the front of a lens, and an arbitrary position which is rotated around an optical axis of the lens. And a holder ring that can be stopped
A dark part photographing apparatus, wherein a mirror holder is detachably attached to the holder ring with a mirror facing the optical axis of the lens. And a video titler for inputting an image signal from the CCD camera and adding character information. The image signal to which character information is added by the video titler is provided. A dark part photographing system, which is configured to be able to output to a video printer or a monitor television.