JPS6080433A - External illuminator in fine gap lamp microscope - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention relates to an external illumination device for a slit lamp microscope, and more specifically, when observing or photographing a subject, in addition to illuminating with a slit light, the present invention also provides a background for the slit illumination as necessary. The present invention relates to an external illumination device for a slit lamp microscope equipped with an illumination device (hereinafter referred to as an external illumination device) capable of illuminating the periphery or the entire area.

Conventionally, with this type of slit lamp microscope, especially one for ophthalmology, opportunities for photographing are increasing as medical examinations become more sophisticated.

When taking photographs using slit lighting, in order to clarify which part of the eyeball is illuminated by the slit lighting, an external lighting device that illuminates the periphery or the entire area, which is the background of the slit lighting, is used to illuminate the slit lighting. There are relatively many cases in which photographs are taken without slit illumination, either by operating the external illumination device at the same time or by operating only the external illumination device.

A conventional slit illumination microscope device of this type will be described with reference to the drawings. In FIGS. Condenser lens 3 is on optical axis B'
The light emitted from the lamp 1 is reflected in the direction of the optical axis B by the movable mirror 4 arranged above. Also strobe lamp 5
The light emitted from the movable mirror 4 passes through the condenser lens 7 along with the light reflected by the concave mirror 6 arranged at the rear, and passes through the slit 8 along the optical axis B when the movable mirror 4 is deviated from the optical axis B. Its direction is bent by the prism 9 along the perpendicular optical axis B', passing through the filter 10, the projection lens system 11, and the head 125 of the slit illuminator 120.
It is bent at right angles by a mirror 12 fixedly attached to the mirror 12, so that it is parallel to the photographing optical axis A and reaches a fulcrum E with respect to the rotation axis of the slit illumination device 120.

This slit illumination device 120 is equipped with a click pole 124 on its lower surface, and the illumination device 120 can be rotated tilll.
When rotating around D, the click ball 124 falls into the click groove provided on the sliding surface 105 depending on the relative position of the microscope main body 100 and the illumination device 120, thereby positioning the illumination device.

On the other hand, an arm section 101 is integrally provided in the microscope main body 100, and an objective lens frame 102, which is integrally fixed, includes an objective lens 13, a variable magnification lens system 14, and an imaging lens 15 for transmitting light Ml+ A movable mirror 17 is arranged along the direction A and is bent in the vertical direction by the prism 16 facing the preset diaphragm 25, and is arranged along the six optical axes '', right next to the prism 16.

The erecting prism 18 is located on the optical axis A'' bent by this movable mirror 1T, which is converted into an optical axis Ah/, and on the axis there is a focusing plate 19 and an eyepiece. 20 are arranged.

When taking a photograph on the film 24, the movable mirror 17 is rotated so that the light beam incident from the objective lens 13 is aligned with the optical axis A.
The light ray reaches the prism 16 along the axis A', and its direction is bent perpendicularly, changing its course in the direction of the optical axis A', so that the light ray passes through the condenser lens 23 and reaches the film 24. .

A floodlight lens 26 and a strobe lamp 27 are incorporated into the external illumination device 140 along an optical axis C, and this optical axis C intersects with the optical axis A at an intersection point E. A rotating frame 141 provided integrally with the external illumination device 140 is rotatably disposed on the outer periphery of the objective lens frame 102 described above. Thus, the external illumination device 140 can rotate around the optical axis A via its rotation frame 141 while maintaining the inclination angle θ.

Arm portion 101 provided on the microscope main body 100 described above
A rotation hole 104 is provided in the rotation frame 103 which is integral with
The upper surface 107 of the rotating frame is in sliding contact with the slit illumination device 12
The rotation shaft 130 is in sliding contact with the sliding surface 123 on the lower surface of the rotation frame 121 of 0.
4 and the shaft hole 111 to constitute the above-mentioned rotation axis.

External illumination is usually illuminated from the left and right sides of the eyeball, that is, from the lateral position, so that it is not blocked by the eyelids.

When using slit illumination and external illumination at the same time, or when taking photographs using only external illumination, the optical axis C of the external illumination device 140 is located at position H, as shown in Figure Ω, and one slit illumination The device 120 is located on the F side, which is the other horizontal position, and the light emitted from the external illumination device (I1140) reaches the intersection point E along the optical axis C without being blocked by the head 125 of the slit illumination device 120. It is possible to illuminate the crab subject, that is, the eyeball located at E, and the slit light emitted from the slit illumination device 120 can also illuminate the eyeball at the same time.

However, if the slit illumination device 120 is rotated to a position such that the optical axis C overlaps with the other horizontal position, H side, in order to avoid corneal reflection from the lesion position or the lesion, the same H
Even if the strobe lamp 27 of the external illumination device 140 is made to emit light so that it overlaps with the external illumination device 140 located at cannot be illuminated.

Similarly, the slit lighting device 120 and the external lighting device 1
Even when the lens 40 is in the F position, the illumination light from the external illumination device 140 is blocked by the head 125 and cannot reach the subject.

For this reason, conventionally, when performing illumination by slit light and external illumination at the same time, or when performing only external illumination, it is necessary to keep in mind the positional relationship in which the external illumination light is not blocked by the head 125 of the slit illumination device 120. Place it in
Rotate the external lighting device 140 to the other horizontal position to change the light emitting position or switch the light source switch.
It was done manually. However, it is necessary to take one's hand off the operating part temporarily, which is cumbersome, and the number of operational errors increases as the number of photographs is taken, resulting in a large amount of wasted photographing.

The present invention has been made in view of the above points, and an object of the present invention is to provide an external illumination device for a slit lamp microscope that has a simple configuration, can prevent operational errors, and can take efficient and reliable photographs. The present invention will be described in detail below with reference to the drawings. FIGS. 3 to 6 illustrate one embodiment of the present invention. In the figures, the same or corresponding parts as in FIG.

Arm portion 101 configured integrally with microscope main body 100
'A condenser lens 26, a strobe lamp 27, and a movable mirror 30 are built into the interior of the lens.
It irradiates the light receiving surface 31a of the light guide 31 which is bent and disposed upward in FIG. This light guide 3
A similar light guide 32 is provided on the opposite side (lower side in FIG. 3) corresponding to 1, and its light receiving surface 32a is connected to the mirror 3
3, the light beam emitted from the lamp 27 is bent by the mirror 30 and the light beam is received.

The light guides 31 and 32 are composed of optical fibers made of glass or plastic, and one end surface thereof is a light receiving surface 31a6 or 32a.
When it receives light from the other end surface 31b or 32b, it emits the received light from the other end surface 31b or 32b.

FIG. 3 shows a state in which the light emitted from the end face 31b illuminates the entire surface of the subject, ie, the eyeball, located at the intersection E. At that time, the slit illumination device 120 and its head 125 are at the position "F" on the lower side of the figure,
It doesn't block the light from.

A mechanism 4 for switching the movable mirror 30 is shown in FIGS. 3 and 4. In the figure, the movable mirror 30 is attached and held by a mirror holding part 34, and a shaft 35 integral with the holding part 34 is connected to a bearing part 1 provided on the arm part 101'.
Jli can be rotated from the inside in 08! equipped. Also, a floor wall cam 36 is attached to the other end of the shaft 35 that protrudes outside.
One end of each spring 39°40 is attached to spring hooks 36cl and 36e fixedly attached to a part of the arm portion 101', and the other end is attached to a spring hook 41, 42 planted on the outside of the arm portion 101'.
is attached under tension. 37 and 38 are implanted on the outside of the arm portion 101' as stoppers for limiting the rotation angle of the floor wall cam 36.

Figure 6 (6), Figure 6 (B), Figure 6 (D) are A of Figure 3.

It is a plan view seen from arrow A', and is a slit illumination device 12.
When the position 0 is in the state shown in FIG. 3F, the inner edge 36b of the cam 36 is pushed by the detection pin 43 that has entered the recess 36a of the eaves-shaped cam 36, as shown in FIG. The cam 36 is rotated about the shaft 35 until the tensile force of the springs 39 and 40 exceeds the center of the rotation shaft 35 and the outer edge 361 comes into contact with the stopper 37. At this time, mirror 30
is in the position shown in the actual record in Figure 3. From this state, move the slit illumination device 120 from E to G-H in FIG.
When moved to change its relative position with the microscope main body 100, the detection bottle 43 moves along its trajectory J and comes into contact with the inner edge 36c of the cam, pressing the cam against the tensile force of the springs 39 and 40. , until the cam 36 reaches the state shown in FIG. 6(B).
Rotate. At this time, the springs 39 and 40 are in a state of tension that is exactly balanced against each other.

If the suppression is continued further, the detection bottle 43 continues to press the inner edge 36c, resulting in the state shown in FIG. 4(C), and the outer edge 36g comes into contact with the stopper 38 and its rotation is stopped.

At this time, the mirror 30 guides the light emitted from the lamp 27 to the light receiving surface 32a of the light guide 32, centered on the position shown by the chain line in FIG.

The mechanism for switching using the difference in relative position between the arm part 101' of the 'jA micro-sharp main body 100 on which the light guides 31 and 32 are fixed and the direction in which the slit illumination device 120 illuminates the subject is as described above. In addition to the above embodiments, there are also examples of pulley and belt transmission mechanisms, combinations of these with gear mechanisms, and even mechanisms that include magnets and switches.

The above is mainly a case of photographing the anterior segment of the eye, ie, the cornea, anterior chamber, iris, and crystalline lens. Also, if the slit illumination device 120 and the microscope main body 100 overlap (G in FIG.
position), transillumination method using reflected light from the retina, and use of ruby lenses, contact lenses, etc. to photograph the vitreous body, retina, or angle; no external illumination is used. In order to detect this state, a microswitch 33 is disposed below the arm 1s101' of the microscope body 100, and the movable tip 33a that turns it on and off is located at the lower end of the slit illumination device 120. Cam 3 installed in
3b, the slit lighting device 1
20 and the microscope main body 100 are pressed together, the switch 33 is turned off, and the power to the lamp 27 is cut off.
Only the illumination by 0 is activated.

When taking a photograph at the relative position of the slit illumination device 120 and the microscope main body 100 at the position H in Figure 3, the movable mirror 30 is located at the position indicated by the chain line in Figure 3 as described above. By the irradiation of the lamp 27, light is emitted from the end face 32b of the light guide 32 to illuminate the subject, and it is possible to take a picture as expected. Similarly, by continuously moving the slit illumination device 120 from the position shown in FIG. The switch 33 continues to be on so that light is emitted from the end surface 32b.

Similarly, in the relative position of the slit illumination device 120 and the microscope main body 100 as shown in E, the mirror 30 is at the position shown by the solid line in FIG. Light that illuminates the subject is emitted from the end surface 31b of the lens. Furthermore, F
The slit illumination device 120 is continuously moved from the position shown in G to the end face 31b immediately before reaching the position shown in G.
within a range that is not blocked by the lighting device 120,
The switch 33 continues to be on so that light is emitted from the end surface 31b as in the case described in 6fl.

When the illumination device 120 and the main body 100 are in the same position as shown in FIG. However, the subject is not illuminated by the light guide 31 or 32.

As explained above, the present invention is provided with a means for detecting the relative position between the light emitting part of the slit illumination and the microscope body, and thereby automatically switches the light emission position and stops the light emission of the illumination device that illuminates the peripheral area or the entire body. As a result, even if you operate the slit lighting without keeping in mind the relative positional relationship between the slit lighting and the lighting device that illuminates the surrounding area or the entire area, or the light emitting position, there will be no failure due to erroneous lighting, and the surrounding area will be illuminated. Since the part of the illumination device that illuminates the microscope section or the entire microscope section is incorporated inside the arm of the container that holds the microscope section, no special space is required and the entire device can be configured compactly, which is advantageous. .

[Brief explanation of drawings]

Figures 1 and 1 show a conventional example, Figure 1 is a longitudinal sectional view showing the arrangement of the optical system, Figure 2 is a plan view of the main parts, and Figures 3 to 3.
Figure O shows an embodiment of the present invention, Figure 3 is a plan view explaining the configuration of the main parts, Figure 3 is a side view, and Figures S to O show the automatic switching mechanism for the illumination position. Fig. 3 is a partial sectional view of the main part, Fig. 6 (B) is a plan view of the state in which it has been rotated in one direction, and Fig. 6 (B) is a plan view showing the state near the intermediate position. FIG. 6(C) is a plan view of a state in which it has been rotated in the other direction. 1...Lamp 2,6...Concave theory

Claims (1)

[Scope of Claims] (1) External illumination device for slit nail type 9gl equipped with an external illumination device capable of illuminating the peripheral area or the entire body apart from illumination by slit light when observing or photographing a subject. , comprising a means for detecting the relative positions of the light emitting part, dg, and mirror part of the slit light illumination, and configured to automatically switch the light emitting position of the external illumination device based on the information detected thereby. Features include: External lighting equipment in the former tunnels. (J2) Patent 1, characterized in that a front external illumination device is incorporated into the arm holding the microscope delivery section. Claim 1) External illumination device in the slit lamp microscope 9 of 12. (3) When the light emitting part of the slit light illumination and the microscope main body overlap, the light emission of the external illumination device is automatically stopped. External illumination device in a slit lamp microscope.