JPH07100146A - Frontal observation device - Google Patents

Abstract

PURPOSE:To enable observations with either both eyes or one eye so as to match observed images with playback images simply and accurately by incorporating a half mirror on the optical axis from the lesion of a patient to a video camera to observe the identical images to those on the video camera. CONSTITUTION:A miniaturized video camera 14 comprising CCD, etc., is fixed at the top of a camera housing 15 and transparent glass window 44 and 45 are provided at the front and the rear parts of the bottom. A half mirror 46 is provided between the glass windows on the optical axis 17 of the camera. A reflecting mirror 47 is provided to refract the reflected light from the half mirror 46 toward the video camera 14. A lens 12 is incorporated between the reflecting mirror 47 and the video camera 14. In observation with both eyes, the reflected light from the lesion of the patient passes on the optical axis 17 through the glass window 44 and is partly reflected by the half mirror 46 and fully reflected by the reflecting mirror 47. Then the reflected light passes through the lens 12 and is imaged on the video camera 14.

Description

Detailed Description of the Invention

[0001]

INDUSTRIAL APPLICABILITY The present invention relates to otolaryngology, plastic surgery, ophthalmology, oral surgery, etc.
Used for viewing to third parties, recording, video reproduction, etc.,
The present invention relates to a so-called teaching head scope observation and viewing device for a forehead, and more specifically, an eardrum,
Even when the field of view is narrow, such as the nasopharynx and larynx, and it can only be observed with a single eye because it is deep inside, the observation image with that single eye, the image from the video camera, and the illumination optical axis of the lighting fixture are The present invention relates to an observation and viewing device for a forehead that is made to match.

[0002]

2. Description of the Related Art Recently, with the advent of a video camera having a small fingertip size and excellent resolution, as shown in Japanese Patent Publication No. 3-23056, this video camera and a forehead mirror are used. Combined, illuminating the affected area with a lighting device, and visually observing the affected area with a video camera as a third eye, and reproducing the image on the cathode ray tube so that the third party can see the viewing and viewing device for the frame. became.

This conventional frame viewing and viewing apparatus will be described in more detail with reference to FIGS. 6 and 7, in which the frame 10 is fixed to the head of the doctor 11. A small video camera 14 such as a CCD and a lighting device 18 are attached via an arm 16 and a universal joint 21 to the approximate center of the forehead of the frame 10. Then, the light from the luminaire 18 is reflected by the reflection mirror 19 to illuminate the affected part 23 such as the eardrum through the illumination optical axis 20, and the reflected light from the affected part 23 passes through the camera optical axis 17 to the camera. The light enters the video camera 14 through the lens 12 and the prism 13 in the housing 15, is converted into an electric signal here, is sent to a monitor device (not shown), and reproduces an image.

Normally, 25 to 3 depending on the left and right eyes 24 and 25
Since the affected area 23 that is about 0 cm apart is observed,
If the camera optical axis 17 and the illumination optical axis 20 of the frame viewing and viewing device are adjusted and fixed so as to coincide with the bisector of the left-eye visual axis 26 and the right-eye visual axis 27, the doctor's 11 The observed image and the image captured by the video camera 14 are substantially coincident with each other, and a so-called teaching head scope can be used to show a correct image to a third person such as a young doctor, a nurse, a patient, or an attendant.

[0005]

However, mainly in otolaryngology, plastic surgery, ophthalmology, oral surgery, etc., the field of view such as the tympanic membrane, nasopharynx, and larynx is narrow, and it is observed only with a single eye because it is deep inside. There are times when you can't. For example, as shown in FIG. 7, when an attempt is made to observe an affected part 23 where the external auditory meatus 22 is narrow and deep, the left eye visual axis 26 of the left eye 24 is affected by the affected part 23.
Even if it reaches, the right visual axis 27 of the right eye 25 does not reach the affected part 23, and only the point A on the side wall of the external auditory meatus 22 can be observed due to the right visual axis 27a. Further, the illumination optical axis 20 of the luminaire 18 does not reach the affected area 23, and only the point B of the ear canal 22 can be illuminated by the illumination optical axis 20a.

Therefore, in order to observe with only a single eye (usually the left eye 24), if the video camera 14 and the luminaire 18 are aligned with the left eye visual axis 26 in FIG. The image from the video camera 14 appears to match. However, even if they match in the horizontal direction in FIG. 7, a completely matched image cannot be obtained unless they match in the vertical direction in FIG. In particular, in the case where the ear canal 22 is narrow, deep, and further bent, the left-eye viewing axis 26, the camera optical axis 17, and the illumination optical axis 20 are not only horizontal but also substantially vertical. It is desirable that they match. However, the conventional apparatus has a problem that these adjustments are extremely troublesome or impossible.

According to the present invention, not only when observing with the left and right eyes 24 and 25, but also when observing with only one of the left eye 24 and the right eye 25, the observation image can be easily and accurately obtained. It is an object of the present invention to provide an apparatus that allows observation and viewing by matching a video camera reproduced image.

[0008]

The present invention provides a frame viewing and viewing apparatus in which a lighting device 18 for illuminating an affected area 23 and a small video camera 14 for capturing an image of the affected area 23 are attached to the frame 10. A half mirror 46 for observing the same image as the video camera 14 is provided on a camera optical axis 17 connecting the video camera 14 and the video camera 14, and the observation viewing device for a forehead is provided with a left eye 24 and a right eye 25. Is provided so as to be movable and adjustable at least from the approximate center position to the left-eye visual axis 26 and / or the right-eye visual axis 27.

[0009]

[Action]

(1) When observing with both eyes The observation viewing device for the forehead is accurately positioned and fixed midway between the left-eye visual axis 26 and the right-eye visual axis 27. When the affected part 23 is observed in this state, the left eye 24 and the right eye 25 directly receive the reflected light rays from the affected part 23 via the left-eye visual axis 26 and the right-eye visual axis 27 and observe the reflected light. Further, the reflected light from the affected part 23 passes through the camera optical axis 17 and the window glass 44, and passes through the half mirror 4
Part of the light is reflected by 6 and is totally reflected by the reflection mirror 47, and then is imaged on the video camera 14 through the lens 12. It is photoelectrically converted by this video camera 14 and sent to the monitor device,
The same image as the image observed by the doctor 11 is reproduced, the correct image is observed, and the image is presented to a third party. (2) When observing with a single eye In the observation viewing device for a forehead, the camera optical axis 17 to the video camera 14 and the illumination optical axis 20 from the luminaire 18 are the left eye visual axis 26 (or the right eye visual axis 27). And fix it to match. When the affected area 23 is observed in this state, the left eye 24
(Or the right eye 25) receives the reflected light from the affected part 23 through the half mirror 46 and observes it. The light beam reflected by the half mirror 46 is imaged on the video camera 14, photoelectrically converted, and sent to the monitor device. As a result, the monocular observation image of the doctor 11 and the image received by the video camera 14 and displayed on the monitor device become the same, and a correct image is observed and presented to a third party.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2, reference numeral 10 denotes a forehead band fixed to the head of the doctor 11. An attachment fitting 30 is integrally provided at a substantially central portion of the forehead portion of the forehead band 10, and the insertion hole 3 is horizontally provided at a tip portion of the attachment fitting 30.
1 is formed, and the L-shaped support arm 32 is horizontally movably inserted and fixed by the fixing screw 43.

Next, reference numeral 33 is a holder. The camera housing 15 is attached to a vertical video camera attachment hole 34 of the holder 33, and two lighting fixture attachment pieces integrally provided at the tip of the holder 33. A housing 28 for a lighting fixture is attached between 35. Positioning pins 36 are screwed and fixed to both sides of the holder 33, and an L-shaped metal fitting 37 is provided on either side of the holder 33.
After positioning with, it is attached with a screw 48. If necessary, the other surface can be replaced and attached.

The support arm 32 and the L-shaped metal fitting 37 are connected via a universal joint 21.
The spherical portion 38 of the universal joint 21 is the cylindrical portion 4
It is rotatably fitted to 0 and is pressed by the coil spring 41. The threaded portion 39 integrated with the ball portion 38 is formed by the L-shaped metal fitting 37.
And the other end of the tubular portion 40 is fixed to the support arm 32 with a screw 42.

At the upper end of the camera housing 15,
Compact and high resolution video camera 1 consisting of CCD etc.
4 is fixed downward and fixedly fitted, and transparent window glasses 44 and 45 are provided on the front and rear portions of the lower end of the camera housing 15, and between the window glasses 44 and 45, A half mirror 46 is provided on the optical axis 17 of the camera, and a reflection mirror 47 for refracting the reflected light of the half mirror 46 toward the video camera 14 is provided. Between the reflection mirror 47 and the video camera 14. The lens 12 is interposed in the.

The luminaire housing 28 is vertically fixed by screws between the luminaire mounting pieces 35, the luminaire 18 is mounted on the upper end, and the reflection mirror 1 is mounted on the lower end.
9 is provided, and a lens 49 is provided in the middle.
The illumination optical axis 20 of the luminaire 18 is provided slightly above the camera optical axis 17 in the embodiment of FIG. 1, but it is desirable that the illumination optical axis 20 be as close to the camera optical axis 17 as possible. As shown in the drawing, the tubular portion 50 may be provided so as to project from the camera optical axis 17 at the lower end portion of the camera housing 15, and the reflection mirror 19 may be attached to the outer periphery of the tubular portion 50. Further, as shown in FIG. 5, a plurality of lighting fixtures 18 may be provided on the outer circumference of the tubular portion 50.

The operation of the above configuration will be described. (1) Observation with both eyes As shown in FIG. 2, the camera optical axis 17 of the video camera 14 is used.
And the illumination optical axis 20 of the luminaire 18 are set so as to be accurately positioned between the left-eye visual axis 26 and the right-eye visual axis 27.
That is, the fixing screw 43 is loosened, and the support arm 32 is moved left and right in the insertion hole 31 of the mounting bracket 30 so that the camera optical axis 17 of the video camera 14 and the illumination optical axis 20 of the lighting fixture 18 are left eye 24 and right eye. The fixing screw 43 is tightened and fixed so that it is located at an intermediate position of the eye 25. Further, the holder 33 is swung back and forth, left and right by the spherical portion 38 and the tubular portion 40 of the universal joint 21 so that the illumination optical axis 20 and the camera optical axis 17 are accurately directed and illuminated to the affected area 23.

When the affected area 23 is observed in this state, the left eye 24 and the right eye 25 receive and observe the reflected light rays directly from the affected area 23. In addition, the reflected light from the affected area 23 is
After passing through the camera optical axis 17 and the window glass 44, the light is partially reflected by the half mirror 46 and further totally reflected by the reflection mirror 47, and then is focused on the video camera 14 through the lens 12. The image is photoelectrically converted by the video camera 14 and sent to the monitor device, the same image as the image observed by the doctor 11 is reproduced, the correct image is observed, and the image is viewed by a third party.

(2) Observation with a single eye (for example, the left eye 24) As shown in FIG. 3, the camera optical axis 17 of the video camera 14 is used.
And the illumination optical axis 20 of the lighting fixture 18 are set so as to be located on the left-eye visual axis 26. That is, the fixing screw 43 is loosened, and the support arm 32 is inserted into the insertion hole 31 of the fitting 30.
Move to the left and right inside the camera optical axis 1 of the video camera 14.
7 and the illumination optical axis 20 of the luminaire 18 are exactly aligned with the left eye visual axis 26, and the fixing screw 43 is tightened and fixed.
Further, the holder 33 is swung back and forth, left and right by the spherical portion 38 and the tubular portion 40 of the universal joint 21 so that the illumination optical axis 20 and the camera optical axis 17 are accurately directed and illuminated to the affected area 23.

When the affected area 23 is observed in this state, the reflected light from the affected area 23 is received by the left eye 24 through the window glass 44, the half mirror 46 and the window glass 45 of the camera housing 15, as shown in FIG. And observe. Also,
The light beam reflected by the half mirror 46 is reflected by the reflection mirror 47, passes through the lens 12, and forms an image on the video camera 14. It is photoelectrically converted by the video camera 14 and sent to the monitor device. As a result, the image observed by the left eye 24 of the doctor 11 and the image received by the video camera 14 and displayed on the monitor device become the same, and a correct image is observed and presented to a third party.

It should be noted that although the observation with the single eye is generally performed by the left eye 24, when the observation by the right eye 25 is desired, the L-shaped metal fitting 37 is attached to the right side surface of the holder 33 in FIG. By inserting the support arm 32 by reversing the right and left, the video camera 14 and the lighting fixture 1
It is also possible to make 8 coincide with the right-eye visual axis 27 of the right eye 25 as shown by the chain line in FIG.

[0020]

【The invention's effect】

(1) Since the half mirror 46 for observing the same image as the video camera 14 is interposed on the camera optical axis 17 that connects the affected part 23 and the video camera 14, not only the doctor 11 under examination but also the young The same image can be viewed by a large number of third parties such as doctors, nurses, patients and attendants. Therefore, it is extremely effective for learning and training medical technology as a so-called teaching headscope, such as video viewing during practical training and educational viewing during surgery. (2) Camera optical axis 1 connecting the affected part 23 and the video camera 14
Since 7 can be correctly set at the intermediate position between the left eye 24 and the right eye 25, there is no parallax between the video camera 14 and the doctor 11 who is observing with both eyes.

(3) Since the observation and viewing device for the forehead is provided so that its movement is adjustable, the field of view is narrow, such as the eardrum, nasopharynx, and larynx in otolaryngology, plastic surgery, ophthalmology, and oral surgery, and Even in the case where it can be observed only by a single eye because it is deep inside, the observation of the single eye (left eye 24 or right eye 25) and the image captured by the video camera 14 are completely the same. (4) Since the illumination device 18 for illuminating the affected part 23 is provided and the illumination optical axis 20 of the illumination device 18 is provided as close as possible to the camera optical axis 17, the field of view is narrow and the affected part 23 at the deep depth is provided. Even if it is, it can be illuminated reliably.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an embodiment of a frame viewing and viewing device according to the present invention.

FIG. 2 is a partially cutaway plan view of FIG.

FIG. 3 shows a viewing and viewing device for a forehead according to the present invention, which is provided with a left eye axis 2
It is a top view of the state set to 6.

FIG. 4 is a cross-sectional view of a different example of the lighting fixture 18.

FIG. 5 is a sectional view of still another example of the lighting fixture 18.

FIG. 6 is a side view showing a conventional observation and viewing device for a forehead band.

FIG. 7 is a plan view showing an example of observation by a conventional frame viewing and viewing device.

[Explanation of symbols]

10 ... Frame band, 11 ... Doctor, 12 ... Lens, 13 ... Prism, 14 ... Small video camera, 15 ... Camera housing, 16 ... Arm, 17 ... Camera optical axis, 18 ... Lighting fixture, 19 ... Reflection mirror, 20 ... illuminating optical axis, 21 ... universal joint, 22 ... ear canal, 23 ... affected area, 24 ...
Left eye, 25 ... right eye, 26 ... left eye visual axis, 27 ... right eye visual axis,
28 ... Housing for lighting equipment, 30 ... Mounting bracket, 31
… Insert holes, 32… Support arms, 33… Holders, 3
4 ... video camera mounting hole, 35 ... lighting fixture mounting piece,
36 ... Alignment pin, 37 ... L-shaped metal fitting, 38 ... Ball part,
39 ... Screw part, 40 ... Cylindrical part, 41 ... Coil spring, 42 ...
Screw, 43 ... Fixing screw, 44 ... Window glass, 45 ... Window glass, 46 ... Half mirror, 47 ... Reflecting mirror, 48 ... Screw, 49 ... Lens, 50 ... Cylindrical part.

Claims (3)

[Claims] 1. In a frame viewing and viewing apparatus in which a small video camera 14 for picking up an image of an affected part 23 is attached to a frame 10, the video camera 14 is attached to a camera optical axis 17 connecting the affected part 23 and the video camera 14. An observation / display device for a forehead, which is characterized by interposing a half mirror 46 for observing the same image as the above. 2. A lighting device 18 for illuminating an affected part 23 is provided, and an illumination optical axis 20 of the lighting device 18 is set as a camera optical axis 17.
The observation and viewing device for a forehead according to claim 1, which is provided as close as possible to the. 3. An observation viewing device for a forehead is provided with at least a left visual axis 26 and / or a substantially central position of the left eye 24 and the right eye 25.
Alternatively, it is provided so as to be movable and adjustable up to the right-eye visual axis 27.
Alternatively, the observation and viewing device for a frame as described in 2.