KR100781665B1 - Combined Indirect Ophthalmoscope with upright and inverted image - Google Patents

Abstract

The present invention is to provide an indirect ophthalmoscope which allows the indirect ophthalmoscope to be viewed directly in the form of an indirect ophthalmoscope, which can simultaneously observe the upright and inverted images.

 In the light source for transmitting light to the eye of the subject, the condenser lens installed in front of the eye of the subject, and the image ophthalmoscope for transmitting the image applied to the condenser lens through the central mirror and the left and right mirrors,

Located in the lower side of the image ophthalmoscope, a flat mirror for applying the image applied through the condensing lens to the rear end, a Schmitt prism to totally reflect the image of the flat mirror, and the image of the Schmitt prism eyes It consists of a right planar mirror and beam splitter applied to make the existing indirect ophthalmoscope look straight, and the existing inverted image is added on top of it so that the examiner can use both.

Directly, Icon, Ophthalmoscope, Camera, Schmitt Prism, Condenser

Description

Combined Indirect Ophthalmoscope with upright and inverted image}

1 is a schematic diagram showing the principle of a general image ophthalmoscope,

Figure 2 is a perspective view of the Schmitt prism used in the direct ophthalmoscope of the present invention,

3 is a schematic view of a direct indirect ophthalmoscope in which the Schmitt prism is used in the present invention,

Figure 4 is a partial perspective view of the combined eyeglass and ophthalmoscope of the present invention,

5 is a partial cross-sectional view showing an embodiment of a linear and image combined optoscope of the present invention,

Figure 6 is a perspective view showing the inside of the protrusion in the direct vision and combined vision ophthalmoscope of the present invention,

7 is a view showing an image of the subject with a direct vision and a combined eye glasses according to the present invention;

Figure 8 is a cross-sectional view of the color selection bar formed in the protrusion in the direct and image combined speculum of the present invention,

Figure 9 is a cross-sectional view of the light source control bar formed in the protrusion in the direct and image combined speculum of the present invention.

Explanation of symbols on the main parts of the drawings

1: eye of the subject 2: condensing lens

3: light source 4: lens

5, 5 ': Center mirror 6, 6': Left and right mirror

7, 7 ': flat mirror 8: right flat mirror

8-1: beam splitter (or left flat mirror)

9, 9 ': Handle 10, 10': Schmitt prism

12: reflection mirror 15: the image ophthalmoscope

16: camera receiver 21. 21 ': sliding bar

20: body 22: long hole

26: position control bar 28: light source control bar

27: color selection bar 33: protrusion

30: direct vision eyeglasses 32: LED fixture

37: connector

The present invention relates to a direct vision (upright image) in which an image of a subject can be seen as it is, and a direct vision and combined vision ophthalmoscope in which an examiner can simultaneously view a figure (inverted image) in which images of the subject are changed up, down, left, and right.

Ophthalmoscopes designed to look inside the eye are used to look at the image of the retina with light reflected from the retina by illuminating the pupil in the dark room.

Fundamental examination is essential for the diagnosis of retinal disease, which is the most common cause of blindness in current eye diseases. There are three methods of fundus examination, which have different advantages and disadvantages.

(1) Ophthalmic ophthalmoscopes are mainly used for screens and are used for relatively simple fundus examinations such as papillary edema.

(2) Fundus examination, such as slit lamp using special lens, has been widely used in recent years, and it has the advantage that the fundus test can be performed like general slit lamp test.

(3) The indirect ophthalmoscope is somewhat different from the above two methods. First, it is useful when the entire retina can be observed. It is used for the diagnosis of the back. In addition, since the sclera is pressed while observing the sclera, dynamic observation of the retina is possible.

Therefore, the indirect ophthalmoscope is necessary for all ophthalmology offices, and it is an ophthalmological device for each office in general hospital. Attempt of retinal detachment surgery Indirect ophthalmoscope is required for the indication of retinal tear and should be kept in ophthalmic retinal surgery room.

However, at present, the indirect ophthalmoscope in which the fundus image is shown upside down increases the demand of the indirect ophthalmoscope in the upright view. Indirect ophthalmoscope was needed.

The present invention is to solve the above problems,

It is an object of the present invention to provide an indirect ophthalmoscope for making an existing indirect ophthalmoscope look straight, and to provide a combination of both an upright and an inverted ophthalmoscope capable of simultaneously observing an upright and inverted image.

Another object is to provide an indirect ophthalmoscope that is inverted, and to add an existing inverted ophthalmoscope on top of it to provide a combination of both the visual and visual ophthalmoscope that the examiner can use both.

Another object is to provide an ophthalmoscope with an easy structure for intravitreal surgery in the outpatient by the combination of both upper and upper image.

The above object is to provide a light source for transmitting light to the eye of the subject, a condenser lens installed in front of the eye of the subject, and an image ophthalmoscope for sending an image applied to the condenser lens through a central mirror and left and right mirrors,

Located in the lower side of the image ophthalmoscope, a flat mirror for applying the image applied through the condensing lens to the rear end, a Schmitt prism to totally reflect the image of the flat mirror, and the image of the Schmitt prism eyes This can be achieved by the right planar mirror and the beam splitter to be applied.

The left and right flat mirror is connected to the sliding bar through the triangular body at the bottom, and is connected to the handle on the other side, wherein the Schmitt prism 45 ° light on the other side or inclined surface on the other side It is characterized in that the total reflection is formed by exceeding the critical angle of the glass (about 42 °) to enter.

In addition, the light receiving unit of the camera is configured to further include an image signal is applied through the reflection mirror therein, the light source is formed of a plurality of light emitting diodes that emit light of different colors, respectively, the intensity of the light and It includes a means of selecting a color.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic diagram showing the principle of a general inverted (vertical) ophthalmoscope.

The condenser lens 2 is positioned in front of the eye 1 of the examinee, and the condenser lens 2 is configured such that light from the light source 3 is applied through the lens 4.

The lens 4 is a convex lens for focusing the light source.

The image signal applied through the condenser lens 2 is configured to be applied to the examiner's eyes through the left and right mirrors 6 and 6 via the central mirrors 5 and 5 '.

That is, as shown in the drawing, the inverted image formed on the subject's eye 1 is inverted through the condensing lens 2 to become an upright image, and the center mirrors 5, 5 'and the left and right mirrors 6, 6' are also inverted. ), The left and right are changed so that the image of the examiner's eyes is changed to the image.

The image ophthalmoscope 15 as described above has the following advantages and disadvantages.

Advantages of Indirect Ophthalmoscope

(1) The entire retina can be observed.

(2) Wide field of view of fundus observation is widely used for diagnosis of retinal detachment and eye tumor.

(3) Since the sclera is pressed while observing, dynamic observation of the retina is possible.

(4) Stereoscopic vision is possible compared to the direct eye glasses

(5) It is possible to fix the indirect eyeglasses on the examiner's head, hold the condenser lens with one hand, and perform various procedures inside and outside the eye with the other hand.

Disadvantages of Indirect Ophthalmoscopes

(1) The image of the fundus retina changes upside down and left and right.

(2) It can not be properly used for the outpatient procedure and more difficult when the procedure is performed with the instrument inserted into the vitreous cavity.

Fig. 2 is a perspective view showing a Schmitt prism used in a straight (upright) ophthalmoscope of the present invention, which is used to change the direction of light.

The Schmidt prism 10 has a total reflection when the light entering the perpendicular or inclined plane enters the other side at 45 ° and exceeds the critical angle of the glass (about 42 °), thereby increasing the forward direction by 180 °. Change.

FIG. 3 is a schematic diagram of a linear indirect ophthalmoscope used in the present invention, showing an embodiment in which the Schmitt prism is used in FIG. 2.

The linear ophthalmoscope 30 has a condenser lens 2 positioned in front of an eye 1 of a subject, and the light passing through the condenser lens 2 is a flat mirror 7, 7 ′ and a Schmitt prism 10. After passing through 10 ', it is configured to be reflected by the flat mirror 8 and applied.

Therefore, the image inverted through the condenser lens 2 is again inverted in the Schmitt prism 10, 10 'so that the upright image is applied to the examiner's eye through the left and right flat mirrors 8 (only the right is shown). do.

 The present invention to have all the advantages of the above-described ophthalmoscope and direct vision ophthalmoscope as described above

First, the linear ophthalmoscope is formed, and the in-phase ophthalmoscope is positioned on the upper portion of the linear ophthalmoscope.

Fig. 4 is a partial perspective view showing the direct and image combined spectacle of the present invention, and the illustration of the condenser lens 2 provided on the examinee side is omitted.

First, the central mirrors 5 and 5 ', which constitute the image ophthalmoscope, are installed and fixed on the upper part of the Schmitt freezes 10 and 10', and the central mirrors 5 and 5 'are installed. The light passing through) is configured to be applied to the eyes of the examiner through the right flat mirror 8 and the beam splitter 8-1.

The right planar mirror 8 and the beam splitter 8-1 are commonly used even when constructing a direct ophthalmoscope.

The linear ophthalmoscope is a flat mirror (7), (7 ') for applying the image of the subject's eyes to the rear end, and the Schmitt prism (10) for receiving the images of the flat mirror (7), (7') and total reflection (10 ') and the image of the Schmitt prism (10), (10') is applied to the eyes of the examiner is composed of a right flat mirror (8) and a left beam split (8-1).

The beam split 8-1 reflects a part of the light rays to form an image in the eyes of the inspector, and a part of the transmitted image signal is applied to the light receiving unit 16 of the camera, which will be described later.

When the camera mentioned later is not used, the beam split 8-1 can be used as a left flat mirror.

In addition, a condenser lens 24 is formed behind the beam splitter 8-1 on the left side, and a camera light receiver 16 is mounted to capture an image signal. The image signal applied through the Schmitt prism 10 is focused. It is configured to pass through this possible condensing lens 24 and to be applied to the light receiving portion 16 of the camera through a separate reflection mirror (12 in FIG. 5).

This means that the image angle of the camera is within 10 degrees, the focal image is 20 diopters for the condenser lens 24 to fill the camera light receiver 16, and the distance between the light receiver 16 and the condenser lens 24 is about 50 mm. The focusing distance is controlled by the condenser lens 24 to adjust the distance, and the reflection mirror 12 is configured to adjust the tilt, and the center of the fundus image is the center of the light receiver 16. It is configured to be controlled to be authorized.

Fig. 5 is a partial cross-sectional view showing an embodiment of the above-mentioned direct vision and combined vision ophthalmoscope.

Here, the reflecting mirror 12 is attached to a tripod holder (possible tilt control) to apply a direct signal to the light receiving portion 16 of the camera.

And as described above, the central mirror (5), (5 ') and the flat mirror (7), (7') is installed in the body 20, the left and right flat mirrors (8), (8-1) are both sides Is attached to the triangular body.

The triangular body is connected to the sliding bars 21, 21 'at the lower side through the fastening means, and the sliding bars 21, 21' are slid in the long hole 22 formed in the body 20. It is inserted for exercise.

Handles 9 and 9 'are connected to the other side of the triangular body, and the teeth of the handles 9 and 9' are engaged with the teeth formed in the body 20 and the sliding bar 21, 21 'is configured to move.

In addition, in the body 20, the projection 33 having the flat mirrors 7 and 7 'therein is provided with a positioning bar 26 at the lower end, and a light source adjusting bar 28 is formed at the top. have.

Here, the position adjustment bar 26 is a fine adjustment bar for adjusting the light emitted from the light source by 90 degrees to face the pupil of the subject, and the light source adjustment bar 28 adjusts the size of the light.

This relationship is shown in more detail in FIG.

Figure 6 is a perspective view showing the inside of the projection in the direct and image combined speculum with the present invention is a rear view.

Although not shown in the protrusions 33, a plurality of light emitting diodes (LEDs) emitting light of different colors are built in, and the light emitting diodes (LEDs) are fixed to the lower part of the LED fixture 32. . And a means for controlling the light (color selection bar, light source control bar) and the like is built.

Here, the focus adjustment bar 34 is to focus the desired focus of the tube through the vertical movement of the condenser lens. Reference numeral 37 is a connector connecting the light receiving unit 16 of the camera and the image processing unit of the PC camera.

That is, the color selection bar 27 formed in the protruding portion 33 is formed in both the direct vision and the combined vision ophthalmoscope, and a plurality of holes for selecting the light emitting diodes (LED) are formed in the spatula-shaped color selection bar 27. The lower part shows the structure fixed by the leaf spring.

9 shows a light source control bar 28 formed in the projection 33. In this case, a plurality of holes having different sizes are drilled in the shape of the fist-shaped direction, and are fixed by a leaf spring at the bottom thereof.

The light source control bar 28 is rotated to apply light of the light emitting diode to a hole having a desired size.

That is, the light source control bar 28 adjusts the size of the light emitted from the light source, and the color selection bar 27 sets the color of the light output by selecting the light emitting diode.

The position adjusting bar 26 fixed to the lower portion of the protrusion 33 adjusts the angle of the reflector 29 so that the light of the light source is directed to the pupil of the test subject.

In the present invention configured as described above, when inspecting the eye to be examined, the light source adjusting bar 28 of the protrusion 33 adjusts the size of the light emitted from the light source as shown in FIG. Select.

Next, the position adjustment bar 26 is turned to adjust the light emitted from the light source to face the pupil of the subject.

When the left and right handles 9 and 9 'are rotated, the sliding bars 21 and 21' move in the long hole 22 while being engaged with the gears so as to fit the eyes of the examiner.

When the inspection is performed after such adjustment, the image introduced through the condenser lens is inverted as shown in FIG. 1 and is transmitted to the examiner through the left and right flat mirrors 8 and 8-1 of FIG.

In addition, the image introduced through the condenser lens is totally reflected by the Schmitt prism 10, 10 'through the planar mirrors 7 and 7' in FIG. 5 and through the left and right planar mirrors 8 and 8-1. The principle of the upright phase generated at this time is delivered to the inspector, as described with reference to FIG. 3. As a result, the inspector can obtain the image and the direct image as shown in FIG.

In particular, when a low-cost personal camera is attached to the light receiving unit 16 of the camera, the image can be displayed and stored on the monitor, and only the light receiving unit 16 portion of the camera can be installed in the ophthalmoscope, thereby reducing the weight and volume of the ophthalmoscope.

As described above, the present invention provides an upper-level ophthalmoscope at the bottom while using the structure of the existing in-situ ophthalmoscope as it is, so that the structure can be simplified.

Since it can be observed with both eyes, it becomes stereoscopic vision, and the upper part shows the same image as the conventional image ophthalmoscope, and the lower part shows the same image as the upper part, so that the examiner can observe the same image directly and the upper part of the image at the same time.

Claims (5)

 A light source 3 for transmitting light to the eye 1 of the subject, a condenser lens 2 installed in front of the eye 1 of the subject, and an image applied to the condenser lens 2 in the center mirror 5; In the image ophthalmoscope which is sent through 5 'and left and right mirrors 6 and 6', Located in the lower side of the image ophthalmoscope, the flat mirror (7), (7 ') for applying the image applied through the condensing lens (2) to the rear end, Schmitt prism (10), (10 ') for receiving the image of the plane mirror (7), (7') and total reflection A direct and in-vehicle combined eye glasses composed of the right flat mirror (8) and the beam splitter (8-1) for applying the image of the Schmitt prism (10), (10 ') to the eyes of the examiner. The right flat mirror (8) and the beam splitter (8-1) are connected to the sliding bars (21), (21 ') at the lower end through a triangular body, and the handle (9), ( 9 '), both visual and visual ophthalmoscopes According to claim 1, wherein the Schmitt prism 10, 10 'is configured to be totally reflected beyond the critical angle (about 42 °) of the glass by injecting light entering the right angle or the oblique surface at 45 ° to the other surface Direct vision and combined vision ophthalmoscope characterized in that. The camera according to claim 1, further comprising a light receiving unit 16 of the camera such that an image signal is applied to the light receiving unit 16 through a beam splitter 8-1 on the left side. And the light-receiving unit 16 is configured to adjust the inclination of the reflective mirror 12 in the middle at a certain distance, characterized in that the combined eye and vision ophthalmoscope. The light source control bar (28) and color selection bar (27) according to claim 1, wherein the light source (3) is formed of a plurality of light emitting diodes, each of which emits light of a different color. And the position adjusting bar 26 is configured to be inserted into the protrusion 33 of the body 20, both linear and visual ophthalmoscope.

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