KR102174559B1 - Slit-lamp microscope having dual aperture - Google Patents

Abstract

Disclosed is a slit-lamp microscope equipped with a dual diaphragm that adjusts the amount of light of a signal guided to both eyes of an examiner. The dual diaphragm 60 of the slit-lamp microscope has a pair of through holes 62a and 62b through which signal light transmitted from the microscope unit 22 to the pair of left and right eyepieces 26a and 26b respectively passes. An aperture frame 62 that has been made; One or more blocking plates 72a and 72b are rotatably coupled to one or more rotation shafts 64a and 64b formed around the through holes 62a and 62b to block or open the through holes 62a and 62b. A pair of light amount control units 70a and 70b; The other end 76 of the blocking plates 72a and 72b is rotated along the periphery of the through holes 62a and 62b so that the respective blocking plates 72a and 72b rotate around the rotation shaft 64a and 64b. A pair of guides 80a and 80b for pushing and moving; And a diaphragm driving part 90 for simultaneously rotating the pair of guides 80a and 80b along the periphery of the through holes 62a and 62b.

Description

Slit-lamp microscope having dual apertures

The present invention relates to a slit-lamp microscope, and more particularly, to a slit-lamp microscope provided with a dual aperture for adjusting the amount of light of a signal guided to both eyes of an examiner.

A slit-lamp microscope is an ophthalmic device that examines the condition of the eye to be examined by radiating a measurement light in the form of a slit to the eye to be examined and observing an optical cut surface of the eye to be examined. Using a slit-lamp microscope, not only can the eyelid, conjunctiva, cornea, anterior (front), lens, vitreous, etc.) be inspected by adjusting the width, length, and angle of the measurement light. It is also possible to take pictures of the lower part and the fundus, and measure the thickness of the cornea and lens. 1 is a perspective view showing the structure of a conventional slit-lamp microscope. As shown in FIG. 1, a conventional slit-lamp microscope includes an illumination optical unit 10 for irradiating a slit-shaped measurement light into the eye to be examined, an observation optical unit 20 for observing the eye irradiated with the measurement light, and the A carriage 30 for supporting the illumination optical unit 10 and the observation optical unit 20, and for fixing the position of the illumination optical unit 10 and the observation optical unit 20 Includes the government (40). The observation optical unit 20 includes a microscope unit 22 for magnifying the signal light reflected from the eye to be examined, an eyepiece optical system 26 for observing the magnified signal light with the naked eye, and a camera 24 for photographing the magnified signal light. do. Here, the signal light magnified by the microscope unit 22 is separated by a beam splitter (not shown) and guided to the eyepiece optical system 26 and the camera 24, respectively, and the eyepiece optical system 26 is By providing a pair of eyepieces 26a and 26b so that the signal light can be observed using both eyes of the left eye and the right eye, the eye to be examined can be observed three-dimensionally.

In such a typical slit-lamp microscope, according to the brightness of the signal light or ambient light (in addition to the signal light reflected from the subject's eye, incident from the periphery of the subject's eye), which is guided to the camera 24 and/or the eyepiece optical system 26, It is necessary to adjust the amount of light of the signal or ambient light guided to the camera 24 and/or the eyepiece optics 26. That is, if the brightness of the signal light or ambient light guided to the camera 24 is too bright, the amount of the signal or ambient light guided to the camera 24 is reduced, and the brightness of the signal or ambient light guided to the camera 24 is too dark. If the light amount of the signal light guided to the camera 24 is increased, a signal light image of sufficient brightness can be obtained. In this way, in order to adjust the amount of light of signal or ambient light supplied to the camera 24, a method of mounting a stop for adjusting the amount of light to the camera 24 or the microscope unit 22 has been proposed. However, since a typical aperture has a single aperture structure that reduces or enlarges only one optical path (refer to International Publication WO 2010/024600A2, WO 2017/135789 A1, WO 2016/122089 A1, etc.), a pair of eyepieces 26a, In the slit-lamp microscope equipped with 26b), the size of the aperture is excessively large, the operation structure is complicated, and the signal light guided to the pair of eyepieces 26a and 26b cannot be efficiently controlled. There is this.

It is an object of the present invention to provide a slit-lamp microscope equipped with a dual diaphragm capable of adjusting the amount of light of a signal guided to both eyes of an inspector.

Another object of the present invention is to provide a slit-lamp microscope capable of adjusting the depth of observation of an image of the eye to be examined by adjusting the amount of light reflected from the eye to be examined.

Another object of the present invention is to provide a slit-lamp microscope capable of reducing an installation space by having a compact structure and an efficient driving mechanism, and capable of simply driving two diaphragms at the same time.

In order to achieve the above object, the present invention, the illumination optical unit 10 for irradiating the measurement light in the form of a slit to the eye to be examined; Including a microscope unit 22 for magnifying the signal light reflected from the eye to be examined, a dual aperture 60 for adjusting the amount of the magnified signal light, and a pair of left and right eyepieces 26a and 26b for observing the enlarged signal light with the naked eye. Observation optics 20; A carriage 30 supporting the illumination optical unit 10 and the observation optical unit 20; And it provides a slit-lamp microscope including a fixing portion 40 for fixing the position of the eye to be examined. Here, the dual diaphragm 60 has a pair of through-holes 62a and 62b through which the signal light transmitted from the microscope unit 22 to the left and right eyepieces 26a and 26b respectively passes. Aperture frame 62; One or more blocking plates 72a and 72b are rotatably coupled to one or more rotation shafts 64a and 64b formed around the through holes 62a and 62b to block or open the through holes 62a and 62b. A pair of light amount control units 70a and 70b; The other end 76 of the blocking plates 72a and 72b is rotated along the periphery of the through holes 62a and 62b so that the respective blocking plates 72a and 72b rotate around the rotation shaft 64a and 64b. A pair of guides 80a and 80b for pushing and moving; And a diaphragm driving part 90 for simultaneously rotating the pair of guides 80a and 80b along the periphery of the through holes 62a and 62b.

According to the slit-lamp microscope according to the present invention, it is possible to control the amount of light of a signal guided to both eyes of an examiner, and to control the depth of observation of an image of the eye to be examined. In addition, the slit-lamp microscope according to the present invention has the advantage of having a compact structure and an efficient driving mechanism to reduce an installation space, and to simply drive two diaphragms at the same time.

1 is a perspective view showing the structure of a conventional slit-lamp microscope.
2 is a perspective view of a slit-lamp microscope having a dual aperture according to an embodiment of the present invention.
3A and 3B are an exploded perspective view and a side sectional view of a dual aperture 60 and a camera 24 used in a slit-lamp microscope according to an embodiment of the present invention, respectively.
4 is an exploded perspective view of a dual aperture 60 used in a slit-lamp microscope according to an embodiment of the present invention.
5 is a view for explaining the operating state of the dual aperture 60 used in the slit-lamp microscope according to an embodiment of the present invention.
6 is a slit-lamp microscope according to an embodiment of the present invention, the positions of the blocking plates 72a and 72b in the open state (A) and the blocked state (B) of the through-holes (62a, 62b). Showing drawings.
7 is a rear perspective view of guides 80a and 80b that can be used in a slit-lamp microscope according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In the accompanying drawings, the same reference numerals are assigned to constituent elements having the same or similar functions as in the prior art.

2 is a perspective view of a slit-lamp microscope having a dual aperture according to an embodiment of the present invention. As shown in Figure 2, the slit-lamp microscope according to the present invention, an illumination optical unit 10 for irradiating the measurement light in the form of a slit to the eye to be examined, an observation optical unit 20 for observing the eye to be examined irradiated with the measurement light , A carriage 30 for supporting the illumination optical unit 10 and the observation optical unit 20, and a fixing unit 40 for fixing the position of the eye to be examined. The illumination optical unit 10 includes an illumination system 12 that irradiates the measurement light and a reflection mirror 18 that reflects the measurement light and guides the measurement light to the eye to be examined, and the fixing unit 40 includes the forehead and It includes a forehead fixing part 42 and a chin fixing part 44 respectively supporting the chin.

The observation optical unit 20 includes a microscope unit 22 for magnifying the signal light reflected from the eye to be examined, a dual aperture 60 for adjusting the amount of the magnified signal light, and a pair of left and right eyepieces for visually observing the magnified signal light. Including (26a, 26b), if necessary, may further include a camera 24 for photographing the enlarged signal light. The microscope unit 22 is a conventional magnifying means for magnifying the signal light reflected from the eye to be examined, that is, the image of the eye to be examined, and may include one or more magnifying lenses, and if necessary, the distance between the eye to be examined and the magnifying lens By changing it, you can also adjust the magnification of the image. The eyepieces 26a and 26b are provided in pairs so that the enlarged signal light can be observed using both eyes of the left eye and the right eye, so that the eye to be examined can be observed three-dimensionally. The eyepieces 26a and 26b may include optical elements such as a prism, a lens, and a reflection mirror so that the path of the enlarged signal light can be changed and transmitted to the left and right eyes of the observer, respectively.

3A and 3B are an exploded perspective view and a side sectional view of a dual aperture 60 and a camera 24 used in a slit-lamp microscope according to an embodiment of the present invention, respectively. As shown in FIGS. 3A and 3B, a beam splitter 54 and a camera 24 may be mounted at the rear end of the dual stop 60. The dual diaphragm 60 is positioned in the path of the enlarged signal light transmitted from the microscope unit 22 to the pair of eyepieces 26a and 26b, and controls the amount of light of the signal light. The beam splitter 54 is located in the path of the signal light transmitted from the microscope unit 22 to the pair of eyepieces 26a and 26b, divides the path of the signal light, and part of the signal light is converted into a pair of eyepieces 26a and 26b. 26b), and the other part of the signal light to the camera 24. The camera 24 is a conventional image acquisition means for capturing an image of an enlarged signal light, for example, an image of a signal light having a path changed by a beam splitter 54 installed at the lower end of the dual stop 60 To shoot. When the beam splitter 54 is positioned between the microscope unit 22 and the pair of eyepieces 26a and 26b (state A in Fig. 3B), the observer can use the image of the signal light through the pair of eyepieces 26a and 26b. While observing, it is possible to take an image of the observed signal light using the camera 24. On the other hand, when the beam splitter 54 deviates from the path between the microscope unit 22 and the pair of eyepieces 26a and 26b (state B in Fig. 3B), the image of the signal light can be captured using the camera 24. Although not possible, since the beam splitter 54 is removed from the signal light path, an observer can observe a brighter signal light image through the pair of eyepieces 26a and 26b. In FIG. 3A, reference numeral 56 denotes a rotation knob for changing the position of the beam splitter 54 (A ↔ B), and reference numeral 50 denotes a dual aperture that blocks the path of the signal light passing through the dual aperture 60 from the outside. A housing, and reference numeral 52 denotes a blocking plate for blocking a path of signal light guided to the pair of eyepieces 26a and 26b from the outside.

4 is an exploded perspective view of a dual stop 60 used in a slit-lamp microscope according to an embodiment of the present invention. FIG. 5 is a view for explaining an operating state of the dual diaphragm 60 used in the present invention, and FIG. 5A is a view showing a state in which the through holes 62a and 62b of the dual diaphragm 60 are open, 5B is a view showing a state in which the through holes 62a and 62b are blocked. 6 is a view showing positions of blocking plates 72a and 72b in an open state (A) and in a blocked state (B) with the through holes 62a and 62b.

As shown in Fig. 4, the dual aperture 60 used in the embodiment of the present invention includes an aperture frame 62, a pair of light intensity control units 70a and 70b, and a pair of guides 80a and 80b. And a stop driving part 90. The diaphragm frame 62 provides a path of signal light transmitted from the microscope unit 22 to the pair of left and right eyepieces 26a and 26b, that is, a pair of through holes through which each pair of left and right signal light passes. (62a, 62b) is formed. The light amount control part (70a, 70b) is rotatably coupled to one or more rotation shafts (64a, 64b) formed around the through hole (62a, 62b), one for blocking or opening the through hole (62a, 62b) The above blocking plates 72a and 72b are provided. 6B, one end 74 of the blocking plates 72a and 72b is rotatably coupled to the rotation shafts 64a and 64b, and the other end 76 of the blocking plates 72a and 72b ) May rotate in the inner direction of the through holes 62a and 62b, specifically, in a spiral direction to block the through holes 62a and 62b. The blocking plates 72a and 72b may have an arc shape of substantially the same shape as the circumference of the through holes 62a and 62b, and are continuously overlapped at the same interval along the circumference of the through holes 62a and 62b. May be installed, for example, 4 at 90 degree intervals and 6 at 60 degree intervals. In addition, a blocking plate protrusion 78 for pushing and moving the one end 76 of the blocking plates 72a and 72b may be formed at one end 76 of the blocking plates 72a and 72b.

The guides 80a and 80b pass through holes 62a through the other end 76 of the blocking plates 72a and 72b so that the respective blocking plates 72a and 72b rotate around the rotation shafts 64a and 64b. , Move it along the perimeter of 62b). 7 is a rear perspective view of guides 80a and 80b that can be used in a slit-lamp microscope according to an embodiment of the present invention. 4 and 7, the guides 80a and 80b have the same donut shape as the light amount control parts 70a and 70b, and blocking plates 72a and 72b are provided on the rear surfaces of the guides 80a and 80b. A blocking plate protrusion guide 82 into which the blocking plate protrusion 78 formed on the other end 76 of) is fitted is formed. When the guides 80a and 80b rotate along the circumference of the through holes 62a and 62b, the blocking plate protrusion 78 is also inserted into the blocking plate protrusion guide 82 of the guides 80a and 80b, It rotates along the circumference of (62a, 62b), and the blocking plate (72a, 72b) rotates around one end (74), that is, the rotation shaft (64a, 64b), and the outer circumference of the through hole (62a, 62b) Is blocked (FIG. 6B). As shown in FIG. 7, the blocking plate protrusion guide 82 may be formed to extend radially on the rear surfaces of the donut-shaped guides 80a and 80b. When the blocking plates 72a and 72b are located around the outer periphery of the through holes 62a and 62b (Fig. 6A, the through holes 62a and 62b are open), the blocking plate protrusion 78 is a blocking plate It is located at the outer end of the protrusion guide 82. When the guides 80a and 80b rotate along the circumference of the through-holes 62a and 62b, the blocking plate protrusion 78 also rotates along the circumference of the through-holes 62a and 62b and extends radially. Since it moves in the inner direction of the blocking plate protrusion guide 82 along the protrusion guide 82, the other end 76 and the blocking plate protrusion 78 of the blocking plates 72a and 72b move in a spiral manner, The outer periphery of the (62a, 62b) is blocked (B in FIG. 6, the state where the through holes 62a, 62b are reduced). In addition, a guide protrusion 88 for pushing and rotating the guides 80a and 80b may be formed on the front surfaces of the guides 80a and 80b.

The aperture driving part 90 simultaneously rotates the pair of guides 80a and 80b along the periphery of the through holes 62a and 62b. 4 and 5, the aperture driving unit 90 may have a structure of a sliding bar that moves linearly in the left and right direction, and the pair of guides 80a are provided at both ends of the aperture driving unit 90. Each of the guide protrusions 88 of 80b) may be fitted and vertical guides 92a and 92b extending in a vertical direction may be formed. When the aperture driving part 90 is linearly moved from the left direction (FIG. 5A) to the right direction (FIG. 5B), the guide protrusion 88 fitted in the vertical guides 92a and 92b extends in the vertical direction. After moving downwards along the vertical guides 92a and 92b of the shape, while moving to the upper side, it rotates counterclockwise along the circular trajectory around the through holes 62a and 62b. In this way, when the guide protrusion 88, that is, the guides 80a and 80b, is rotated by a predetermined angle, for example, 60 degrees in the counterclockwise direction, the blocking plates 72a and 72b of the light amount adjusting parts 70a and 70b ) Rotates in a spiral manner, blocking the outer portions of the through holes 62a and 62b (FIG. 6B). Conversely, when the aperture driving part 90 is linearly moved from the right direction (FIG. 5B) to the left direction (FIG. 5A), the opposite process opens the outer portions of the through holes 62a and 62b ( Fig. 6A). If necessary, a horizontal guide 94 in a form extending in a horizontal direction is formed at one end of the aperture driving unit 90, and at least one, preferably at least two, mounted in parallel on the horizontal guide 94 Fixed guide pin 96 may be fitted. Since the fixed guide pin 96 is fixedly coupled to, for example, the aperture frame 62 (see FIG. 4), the aperture driving part 90 performs only a linear motion in the direction in which the horizontal guide 94 is formed. Accordingly, the diaphragm driver 90 performs a more stable linear motion, and the linear motion of the aperture driver 90 is converted into a rotational motion of the guides 80a and 80b. In addition, as required, as shown in FIGS. 3A and 5, one or both ends of the aperture drive unit 90 may be equipped with an adjustment handle 97 for moving the aperture drive section 90 left and right, The user may push the adjustment knob 97 in the left or right direction to move the iris driving part 90 left and right. A plurality of fixing grooves 97a are formed at uniform intervals on the surface of the adjustment handle 97, and an elastic protrusion 98 coupled to the fixing groove 97a is mounted at one end of the frame of the slit-lamp microscope. There may be. Since the elastic protrusion 98 is elastically fitted and fixed to the fixing groove 97a by an elastic means 99 such as a spring, it exceeds the elastic coupling force between the elastic protrusion 98 and the fixing groove 97a. Unless a force is applied from the outside, the elastic protrusion 98 and the fixing groove 97a remain engaged, and the movement of the adjustment handle 97 is suppressed. On the other hand, when the user applies a force exceeding the elastic force between the elastic protrusion 98 and the fixing groove 97a and moves the adjustment handle 97 in the left and right direction, the aperture driving unit 90 moves in the left and right direction. Thus, the open state of the through holes 62a and 62b is adjusted. At this time, the elastic protrusion 98 moves to the other fixing groove 97a on the surface of the adjustment handle 97 to stably fix the position of the stop driving part 90.

In the slit-lamp microscope equipped with a dual aperture according to the present invention, a pair of light quantity control units 70a and 70b formed on the dual aperture 60 operate stably at the same time, and the light quantity control units 70a and 70b The operating mechanism is simple and can be mounted in a relatively small space. In addition, in the slit-lamp microscope according to the present invention, the left and right movement of the adjustment knob 97 is stable, and the horizontal movement position of the adjustment knob 97 is fixed using the fixing groove 97a and the elastic protrusion 98 Therefore, a stopper function for each aperture size can be provided to the adjustment handle 97.

In the slit-lamp microscope according to the present invention, not only can the amount of light guided to the camera 24 be adjusted, but also the amount of light guided to the pair of eyepieces 26a and 26b is adjusted, thereby increasing the observation depth of the image to be examined. Can be adjusted. In the slit-lamp microscope according to the present invention, since the object to be examined does not have a planar structure, but has a three-dimensional structure, if the amount of light incident on the eyepieces 26a and 26b is too large, the image of the subject's eye is brightened. , The depth of field is reduced, so that the focus of the center of the image is excellent, but the focus of the outer part of the image is blurred and it is difficult to observe the entire image. In the slit-lamp microscope according to the present invention, by using the dual diaphragm 60 to reduce the amount of light incident on the eyepieces 26a and 26b, the image of the eye to be examined is partially darkened, but the depth of field is increased, so that the image center and Since it is possible to maintain the focus of the outer part well, there is an advantage that the entire image of the eye to be examined can be observed without distortion.

Claims (7)

An illumination optical unit 10 for irradiating measurement light in a slit shape to the eye to be examined; Including a microscope unit 22 for magnifying the signal light reflected from the eye to be examined, a dual aperture 60 for adjusting the amount of the magnified signal light, and a pair of left and right eyepieces 26a and 26b for observing the enlarged signal light with the naked eye. Observation optics 20; A carriage 30 supporting the illumination optical unit 10 and the observation optical unit 20; And In the slit-lamp microscope comprising a fixing portion 40 for fixing the position of the eye to be examined,
The observation optical unit 20 is located in the path of the signal light transmitted from the camera 24 and the microscope unit 22 to the pair of eyepieces 26a and 26b for photographing an enlarged signal light, A beam splitter 54 for dividing a path and guiding a part of the signal light to the camera 24;
The dual diaphragm 60 is an aperture frame in which a pair of through holes 62a and 62b through which signal light transmitted from the microscope unit 22 to the left and right eyepieces 26a and 26b respectively pass is formed (62);
One or more blocking plates 72a and 72b are rotatably coupled to one or more rotation shafts 64a and 64b formed around the through holes 62a and 62b to block or open the through holes 62a and 62b. A pair of light amount control units 70a and 70b;
The other end 76 of the blocking plates 72a and 72b is rotated along the periphery of the through holes 62a and 62b so that the respective blocking plates 72a and 72b rotate around the rotation shaft 64a and 64b. A pair of guides 80a and 80b for pushing and moving; And
Adjustment knobs 97 for left and right movement are mounted at one end or both ends, a plurality of fixing grooves 97a are formed at uniform intervals on the surface of the adjustment knob 97, and at one end of the frame of the slit-lamp microscope , An elastic protrusion 98 coupled to the fixing groove 97a is mounted, and the elastic protrusion 98 is elastically fitted and fixed in the fixing groove 97a, and the circumference of the through-holes 62a, 62b A slit-lamp microscope comprising a diaphragm driving unit 90 for simultaneously rotating the pair of guides 80a and 80b along the line. delete The method of claim 1, wherein one end (74) of the blocking plate (72a, 72b) is rotatably coupled to the rotation shaft (64a, 64b), and the other end (76) of the blocking plate (72a, 72b) is through The through holes 62a and 62b are rotated in the inner direction of the holes 62a and 62b to block the through holes 62a and 62b, and one end 76 of the blocking plates 72a and 72b is at one end 76 of the blocking plates 72a and 72b. ) The blocking plate protrusion 78 for pushing and moving is formed, a slit-lamp microscope. The method of claim 3, wherein a blocking plate protrusion guide 82 is formed on the rear surface of the guide (80a, 80b) to which a blocking plate protrusion 78 formed on the other end 76 of the blocking plate (72a, 72b) is fitted. There is a slit-lamp microscope. The method of claim 1, wherein a guide protrusion (88) for pushing and rotating the guide (80a, 80b) is formed on the front surface of the guide (80a, 80b),
The diaphragm driving part 90 has a structure of a sliding bar that moves linearly in the left and right direction, and guide protrusions 88 of the pair of guides 80a and 80b are respectively fitted at both ends of the diaphragm driving part 90 and vertically The vertical guides 92a and 92b extending in the direction are formed, a slit-lamp microscope. The method of claim 1, wherein a horizontal guide (94) extending in a horizontal direction is formed at one end of the stop driving part (90), and at least one fixed guide pin (96) is fitted in the horizontal guide (94), The diaphragm driving unit 90 performs only a linear motion in the formation direction of the horizontal guide 94, a slit-lamp microscope. delete

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