KR20070091432A - Combined indirect ophthalmoscope with upright and inverted image - Google Patents

Abstract

An ophthalmoscope is provided to enable a user to observe both an upright image and an inverted image by displaying the inverted image at an upper portion and the upright image at a lower portion. An ophthalmoscope for generating upright and inverted images includes an optical source to emit the light to eyes of users(1). A focusing lens is arranged in front of the eyes of users. The image applied on the focusing lens(2) propagates through center mirrors and left/right mirrors. Planar mirrors(7,7') are arranged behind the ophthalmoscope and apply the image from the focusing lens to a rear portion of the ophthalmoscope. Schmidt prisms(10,10') totally reflect the images from the planar mirrors. The images from the Schmidt prisms are applied to the eyes of users through a right planar mirror(8) and a beam splitter.

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 which makes the existing inverted eyeglasses look upright, and to provide a combination of a direct eye and an inverted eyepiece that can simultaneously observe the upright and inverted images.

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, the Schmitt prism is a light on the other side or inclined surface 45 ° 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 be further characterized in that the image signal is applied through the reflection mirror therein, the light source is formed of a plurality of different light emitting diodes, the light intensity and color can be selected It includes a means.

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 a light source 3 is applied through the lens 4.

The lens 4 is for positioning the focus of the light source as a convex lens.

The image signal applied through the condenser lens 2 is configured to be applied to the examiner's eye 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 then the central mirrors 5, 5 'and the left and right mirrors 6, 6'. ), 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 In-Place Point 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 the Schmitt prism used in the straight (upright) ophthalmoscope of the present invention, which is used to change the direction of light.

This Schmidt prism 10 enters at right angles or inclined planes at 45 ° to the other side and totally reflects when it exceeds the critical angle (approximately 42 °) of the glass. Change.

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

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 passes through a flat mirror 7, 7 ′ through a Schmitt prism ( The light source 3 is configured to be applied through the lens 4.

Therefore, the image reversed through the condenser lens 2 is again inverted by the Schmitt prism 10, 10 'so that the upright image is applied to the examiner's eye through the left and right plane mirrors 8 (only the right side 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 respectively fixed. The light passing through) is configured to be applied to the examiner's eye 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 in the case of constructing a direct eyepiece.

The linear ophthalmoscope is a flat mirror (7), (7 ') for applying the image of the eye of the subject to the rear end, and the Schmitt prism (10) for receiving the image of the flat mirror (7), (7') and total reflection , 10 ', and the image of the Schmitt prism 10, 10' are applied to the eye of the examiner, which consists 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 eye of the inspector, and partly transmitted image signal is applied to the light receiving portion 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 plane mirror.

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

This is because the angle of image of the camera is within 10 degrees, and the focusing lens 24 is 20 diopters for the fundus image to fill the camera receiver, and the distance between the receiver and the lens is about 50 mm. Adjusting the distance, the reflection mirror 12 is configured to adjust the tilt (tilt) in response, it is configured to be controlled so that the center of the fundus image is applied to the center of the light-receiving unit.

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) for applying a direct signal to the camera light receiving unit 16.

As described above, the central mirrors 5, 5 'and the flat mirrors 7, 7' are installed upright in the body, and the left and right flat mirrors 8, 8-1 are triangular bodies on both sides. Is attached to.

The triangular body is connected to the lower sliding bars 21 and 21 'through the fastening means, and the sliding bar is inserted to allow the sliding movement in the long hole 22 formed in the body 20. .

Handles 9 and 9 'are connected to the other side of the triangular body, and the teeth of the handle mesh with the teeth formed on the body so that the sliding bars 21 and 21' 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 a lower end thereof, and a light source adjusting bar 28 is formed at the top thereof. have.

Here, the position adjustment bar is a fine adjustment bar for adjusting the light emitted from the light source 90 degrees toward the subject's pupil, the light source adjustment bar 28 is a bar for adjusting the size of the light.

This relationship is shown in more detail in FIG. 6.

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

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

Wherein the focusing 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 that is connected to the camera receiving unit 16 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 glasses, 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 shape, and fixed to the bottom by a leaf spring.

By rotating the light source control bar 28, light of the light emitting diode is applied to a hole having a desired size.

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

The position adjusting bar 26 fixed to the lower portion of the protrusion 33 adjusts the angle of the reflecting mirror 29 to adjust the light of the light source to the pupil of the inspection target.

In the present invention configured as described above, when inspecting the eye to be inspected, the light source adjusting bar 28 of the protrusion 33 adjusts the size of the light emitted from the light source, and the color adjusting bar 28 adjusts the light source of the desired color. Choose.

Next, turn the position bar 26 to adjust the light 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 vehicle and are aligned with the eyes of the inspector.

When the inspection is performed after such adjustment, the image introduced through the condenser lens is inverted, as shown in FIG.

In addition, the image introduced through the condenser lens is totally reflected by the Schmitt prism 10, 10 'through the plane mirrors 7 and 7' in FIG. 5 and through the left and right plane 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 line up as shown in FIG.

In particular, when an inexpensive personal camera is attached to the camera light receiving unit 16, an image can be displayed and stored on a monitor, and the weight and volume of the ophthalmoscope can be reduced by installing only the light receiving unit of the camera in 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 central mirror (5) for 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 vision 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 condenser 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 a right flat mirror (8) and a beam splitter (8-1) for applying the image of the Schmitt prism (10), (10 ') to an examiner's eye. The right flat mirror (8) and the beam splitter (8-1) are connected to the sliding bars (21) and (21 ') at the bottom through a triangular body, and the handles (9) and (9) on the other side. Direct and in-vehicle ophthalmoscopes characterized in that connected to ') According to claim 1, the Schmitt prism (10), (10 ') the light entering the right side or the oblique plane is incident to the other surface at 45 ° to form over the critical angle of the glass (about 42 °) to form a total reflection Direct and in-vehicle combined ophthalmoscope, characterized in that configured so as to. 2. The camera according to claim 1, further comprising a light receiving unit 16 of the camera, so that an image signal is applied through the left beam splitter 8-1, and the light collecting lens 24 and the light receiving unit 16 of the camera are configured. Direct and in-vehicle optometry, characterized in that configured to adjust the inclination of the reflective mirror 12 in a certain distance According to claim 1, wherein the light source (3) is formed of a plurality of light-emitting diodes of different colors, the light source control bar 28, the color selection bar 27 and the position adjustment bar that can select the intensity and color of the light ( 26) a combination eye and eyepiece, characterized in that configured to be inserted into the lead portion 33 of the body.

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