JPS60210239A - Enlarging ophthalmometer - 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 light is inside the optometry device. Once identified, the patient's image is magnified and in a proper stereoscopic image.
tl. ! I'm looking into an optometrist who can test the bottom, that is, the net.

Taku's device 6 is known for examining the fundus of a patient.

Direct vision optometry is a hand-held device that projects the fundus of the eye but does not actually magnify it. Direct vision optometry kl kJ, corrects the patient's corneal refraction Since no other lens is used, the image remains erect without being inverted.An enlarged image, known as physiological enlargement, also occurs in this direct transmission ophthalmoscope. By the way, the image of the fundus is focused only by the power of the eyes of the doctor conducting the examination, so the image lacks precision.

On the other hand, an indirect ophthalmoscope uses a magnifying lens called a halogen lens or an observation lens. This lens is placed in front of the patient's eyes for stereoscopic WI&'IJH, and is used to connect the magnified fundus image between the patient and the patient. The condensing lens is normally used with a binocular device iH:j, while the device pi is supported on the doctor's head and is a plow that reduces the doctor's interpupillary pressure and provides illumination. do. The 1114 bottom image seen by the doctor is inverted and inverted.

Although indirect optometry provides inverted and inverted images, it is not a medical device that can detect diseases such as urinary retinopathy, retinal detachment, and peruvitis. )l and [7 are widely used. Indirect vision examination 1i1 (in shoes, magnification depends on the magnification of the condensing lens. Although the image that the doctor sees in the indirect eye examination is inverted and inverted, it maintains a proper three-dimensional image. Because the doctor's This is because the images seen by the left eye and the right eye [1] are also exchanged by the device.

Therefore, the correct depth n is expressed. If the left stone statue is also not replaced, a condition known as pseudostereostatism occurs, which may appear as a protrusion or void.

Although indirect ophthalmoscopes have several advantages, it is necessary to have an ophthalmoscope with sufficient magnification and good resolution, especially for studying minute details around eye spots and examining small lesions. has been done. Such a device is capable of examining the entire fundus without sacrificing a proper stereoscopic image or a significant portion of the visual field, thus preserving depth sensation, yet providing good magnification. This is desirable.

[Summary of the invention]

The present invention relates to an improved indirect ophthalmoscope that provides an enlarged stereoscopic view of a patient's fundus. The instrument is equipped with a pair of magnifying (Kepler) obtuses and a series of image rotation mirrors that transmit the fundus image to the magnifying optical system.

This system can both enlarge and maintain stereoscopic images without significantly losing the brightness and range of the field of view. I can do it. In a preferred embodiment, the ophthalmoscope is a compact, microscope-mounted diagnostic instrument for use with a conventional condenser lens to provide the physician with an image of the fundus.

In conventional indirect ophthalmoscopes, magnification is limited by a hand-held condenser lens. A condensing lens magnifies not only the image seen by the doctor but also the image of the light source in the patient's pupil plane. The magnified image of the light source provides room for the doctor to observe the fundus image of the patient! A limit occurs when the 11q or light source that does not enter the foramen is partially blocked by the patient's erythema, reducing the brightness of the fundus image. In practice, this limit is a magnification of 5x.

The present invention solves this problem in a manner that increases the magnification of the fundus image without affecting the magnification of the light source by incorporating a telescope into the eyepiece of the second eyepiece.

An ophthalmoscope according to a preferred embodiment of the invention uses a Kevlar telescope rather than a telescope. Kebcy magnifying optics provide the physician with a fairly wide field of view. In such a Keplerian system (i.e. with a convex eyepiece) a magnification of 6X provides a field of view of approximately 42°, whereas with the same Kepler system a magnification of 10x provides a field of view of approximately 3°. Therefore, the Galilean system (i.e., using a concave eyepiece) only provides a field of view of J8° with a magnification of 6x.

The K7ler cylindrical lens embedded in each eyepiece produces an inverted and inverted image in the observer's eyes, so if the magnifying optic and condensing lens are used alone in a conventional arrangement, If so, the doctor would look at the erect image of the fundus. However, since this condenser lens primarily acts to exchange the right and left images of the doctor's ll+ii holes, this fundus assembly is viewed by the doctor as a pseudo-stereoscopic image. In order to restore the correct stereoscopic image, this image C, which is focused by the left and right eyepieces, must be exchanged or this 4 base image must be inverted/inverted again.

This product features a Keplerian expansion assembly and a cooperating image rotation! This problem is solved by providing a '11 solid (preferably two sets of this image rotation assembly acting in tandem on the left stone statue) to re-invert and re-invert the statue. The net result is that the doctor sees the inverted and inverted image again (as is normal with indirect ophthalmoscopes), but also sees this as a true stereoscopic image and under magnification. .

In one preferred embodiment, the ophthalmoscope has a left-image/stone-image conversion assembly, which assembly is comprised of a series of four buttons, each arranged in optical alignment; Invert/reverse the statue. In this specific example, what about these two sets of subsystems? ! The 'J' blunt is also arranged to act as a beam grid device to separate the image into left and stone images.

At low oil levels in this subsystem, the needles after the incorporation of a series of weights transmit their images to the left and right objectives of the two sets of magnification systems, respectively.

Furthermore, the present invention sets the position of the anterior soft part by li'1,
A mechanism for adjusting the interpupillary distance and observation distance of the doctor can be provided. Furthermore, the invention can provide a means for adjusting the angle and magnification of the irradiated light by W and ζ. In one preferred embodiment, the position of the objective lens is also controlled by a mechanism that provides so-called "zoom" point control.

Without departing from the technical idea of the present invention (one change or
Possible applications will be apparent to those skilled in the art. Example 1: In addition to the specific example z-array,
Various other devices can be used to rotate the light from the condenser lens into R11, which transmits it to the magnifying optics. Similarly, a single image holding subsystem may be used before the beam is split into left and right images. Furthermore, various equivalent mechanisms (for example, a cam mechanism, a pivot mechanism, a translation table, etc.) can be configured in place of the adjustment mechanism illustrated here.

[Detailed description of the preferred embodiment]

FIG. 1 is an overall view of the optometry Q1o according to the present invention, which includes a hand-held condensing lens 40 and a part for mounting on the doctor's head @6.
has 0. The member 60 includes a support bracket 46 that allows the headband 12 to hold the lamp enclosure 16 and optical viewing assembly 62 in front of the physician. Department@60 furthermore,
Aperture 44 (through which the statue is received)
and an eyepiece lens 14.14a for binocular observation.

Furthermore, the member 60 is a~'' for dividing the stratification angle into 14 sections.
- A knob 18, another W4 knob 42 for adjusting the size of the patient's pupil, and a zoom control 148 for adjusting the magnification. - air connector 64 is 7
11 electrical connections to one source (not shown).

In FIG. 2, the image beam path is shown schematically. The left optical path 72 is shown in dashed lines and is formed by the condenser lens 40, the left image rotation assembly 20, and the left magnification assembly 30. The right optical path 72A is shown in solid line and is formed by the condenser lens 40, the right image rotation assembly 20A, and the right magnification assembly 30A. Condensing lens 40s1
, the fundus image of the MA person is focused in the air at the focal plane Aj1.

This statue has the top and bottom, left and right reversed. patient's 1lf
fl Entrance window of the doctor's pupil on the foramen plane, "a" in Figure 2
Note that "" and "b" are also exchanged by the condenser lens 40, so that the doctor's left eye "A" appears in the right entrance window "a" and vice versa. Left/right image rotation assembly 2
0.20A splits the image beam from the condenser lens 40 into left and right images and transmits them to the left and right magnification assembly 30.30A. The state of the pseudo-stereoscopic image generated when the image is re-focused on the focal plane 1'J2 by the magnifying assembly 30.50A is [f! In order for f to occur, the intermediate assembly 20.20A inverts the image M2 again to coincide with the image in the focal plane M1. Thus, the final result that the doctor sees is a correct stereoscopic enlargement, an inverted image. Assembly in progress 20.2O
A is generally known as an image rotation component, and is preferably comprised of a mirror, although other components such as a prism or a combination of a prism and a mirror may also be employed.

3, the preferred optical arrangement for the viewing assembly of FIG. 1 is 11! (Illustrated in 1t.

FIG. 3 shows the abduction schematically illustrated in FIG. 2 in more detail. In FIG. 3, the image rotation member 20.20A of FIG. 2 includes a series of four mirrors 22.24.26, respectively.
．． 28, 22A, 24A.

26fi, , 28A. Each series/
The mirror 22.22A of the mirror inner cylinder is provided for splitting the inverted image from the condenser lens 40 into a left stone image.

The intensity of mirror 22.22A is as shown by arrow 74 or 7J (mN bfr is produced after hIJ along the optical axis 70, and the rack -
the first using a pinion drive or similar
Adjust to the size of the patient's pupil using the eyelid knob 42 shown in the figure.

The left stone statue reflected from the first ζχ22.22A is further mirrors 24.26.2B, 24A, and 26A.

The images from 28.28A of the left/right image rotation assembly are reflected by 28A and sequentially rotated by 180° upward and downward, left and right.
Left with 2.52 and 38.38A eyepieces respectively
It is transmitted to the right magnifying assembly 30.30A. Between the objective lens and the eyepiece of each magnifying assembly, a respective first
and second beriscopic mirror 54.56 and 34A156A
These further separate the objective and eyepiece lenses of each assembly without compromising the overall compactness of the device.

Objective lens 32.32 for eyepiece 38.38A
The 1st place of A is the zoom control device in Figures 4 and 5.
As shown by arrows 76 and 76A in Figure 8, it is possible to move W4 forward and backward along the left and right optical paths.

- In the specific example, this control device k48 is a disc-shaped knob formed by inserting a pin engaged through a rack into both objective lenses 32.32A into a helical groove. is the objective lens 32.32A in the front and rear positions.
A cam mechanism is provided for translation at will. Additionally, in a preferred embodiment, the eyepiece 38.38A is
Individual adjustments can be made, for example by rotation within a threaded housing, to provide even sharper focus to match the doctor's refractive index.

As shown in FIGS. 4 and 4A, the lamp enclosure 16 in the shrine 60 of FIG. battery pack (not shown) and decays. When the lamp is turned on, the light is reflected from the illuminator 58, exits the aperture 44, travels to the condenser lens (FIG. 3), and from there into the patient's eye. The irradiation angle of the irradiation (λ 58) is adjusted by the knob 18. In other words, when the knob 18 is rotated, the sharpener 58 rotates on a horizontal axis transverse to the optical axis 70.

The image rays returning from the patient's eye are transmitted backward through the condensing lens, and upon entering the aperture 44, are divided into the left stone image by the first image rotary casting, 22.22A,
This image is then transmitted to the eyepiece as described above. The knob 42 is connected to a pinion gear 56 which is connected to two racks 66, 66A, across which the first mirror 22, 22 is taken. As soon as the knob 42 is rotated, the rack-binion mechanism is activated! mirror 22.22A is moved back and forth.

The zoom control device for the objective lens 52.52 is shown in FIG.
4A and is illustrated in FIG. 5. knob 4
8, that is, the bottom of the device +-1 has a spiral groove 50.
, into which a bottle 54 is inserted. The bin 54 is connected to a rank 78 mounted on or above the objective 32.32A. Rotating knob 48 moves pin 54 and rack 78, causing objective lens 32.32
Move around AIi.

[Brief explanation of the drawing]

FIG. 1 shows the test 111 according to the present invention. ! It is a perspective view of the whole area. 2nd rNl is a schematic diagram of the imaging optical system of the ophthalmoscope of FIG. 1; 51'! ! , I are more detailed strategic diagrams of the optical power of the ophthalmoscope of FIG. Figure 5 is the front and side view of device i:'j. The names indicated by the numbers are listed below. The numbers of common iiU indicate the same parts. 10: Ophthalmoscope 12: Headband 14.14A: Eyepiece 16: Lamp envelope Ul1 body 18: Adjustment knob 20.20A: Left/right image rotation assembly 22.24.26.28.22A, 24A, 26
28A: Princess 30.30A = left/right enlargement J, r
J assembly 32.32A: Objective lens 34.54A: Periscopic lead. 56. To 56: Periscopic mirror 38. 38A: Eyepiece 40: Condensing lens 42: Adjustment knob 44: Aperture 46 Two support receivers 48: Zoom control device 50: Helix drill 52: Rung 54: Pin 56: Pinion gear 58 : Irradiation record 60: (for head-mounted) part 62: Observation assembly 64: Electrical connector 66.66A rack 70: Optical axis 72.72A: Left/right optical path 78: rack AJl, A/2: focal plane A: Patient's left eye B: Patient's right eye a: Right population window b: Left entrance window

Claims (9)

[Claims] (1) Stereoscopic image detection used with a condenser lens to observe the patient's fundus image! ! comprising left and right eyepieces, a light source, and means for directing light from the light source to the patient's eye, the image of the patient's eye being focused by a condensing lens within a focal plane perpendicular to the optical axis. The image forming apparatus is adapted to form an image, comprising: A. image splitting means for splitting the image into left and stone images respectively transmitted along left and right optical paths; B. left and right image rotation means arranged in optical alignment with the image splitting means and for inverting and inverting each of the left and stone images from the image splitting means; configured,
An ophthalmoscope comprising left and right magnifying means arranged in optical alignment with each image rotating means to magnify the image from the image rotating means and directing the image to each eyepiece. (2) The ophthalmoscope according to claim 1, wherein the image dividing means includes a ■-shaped inverting means disposed centrally along the optical axis. (3) The ophthalmoscope of claim 1, wherein each image rotation means includes a series of reflective means optically aligned to rotate the image stepwise to an inverted and inverted state. (4) The ophthalmoscope according to Patent Application Publication No. 8U, Section V11, Item I, in which each magnifying means includes a pair of veriscopic reflection means arranged in optical alignment between the objective lens and the eyepiece. (5) Adjust the position of the image splitting means along the optical axis.
The ophthalmoscope according to claim 1, which includes means c. (6) The means for guiding the light is to make the light darker and set the angle to s,'3
rU'1 Q・f i) 'l'
The optometry system 1° according to claim 1-1 (7) The magnifying means adjusts the position f of the objective lens along each optical path.
pt. (8) In optometry, which is equipped with left and right eyepieces, a light source, and a means for guiding the light from the light source to the patient's eye to illuminate the image of the patient's eye, A. dividing the image into left and stone statues; B. image dividing means arranged in optical alignment with the image dividing means and for inverting and reversing each of the left and right stone statues from the image dividing means; C0 each; , a pair of proboscis lenses and an eyepiece lens (1), arranged in optical alignment with each image rotation means, magnifies the image from the image rotation means, and converts this image into a 6-tangent lens 11j (lens 11j). An ophthalmoscope consisting of left and right magnification means for transmitting images to the left and right sides. (9) In order to clearly see the image of the patient's fundus, stereoscopic ophthalmoscopy is used with a condensing lens, and the left and right eyepieces, a light source, and the light from the light source must not be directed into the patient's eyes. A. In a method in which the image of the patient's eye is formed by a condensing lens in a focal plane perpendicular to the optical axis by breaking the means described above, A. A V-shaped reflecting means arranged at the center along the optical axis and moving in the front-rear direction along the optical axis is used to divide the image into left and right stone images that transmit the image along the left and right paths, respectively. B. image segmentation means; a series of reflecting means arranged in optical alignment to rotate the image upside down in steps until an inverted and inverted image is obtained; Left and right image rotation means for inverting and inverting the left and right images from the dividing means, and an objective lens and an eyepiece arranged in optical alignment with each of the C0 image rotation means and adjustable respectively;
It has a pair of left and right periscopic mirrors disposed between the objective lens and the eyepiece, and a means for moving the objective lens about 1 point relative to the eyepiece after iii, and a means for rotating the image from the image rotation means. An ophthalmoscope comprising left and right magnifying means for magnifying and transmitting the magnified light to each eyepiece, and D. means for adjusting the angle of light guided from the light source to the patient's eye.