JPH1057314A - Arm, ophthalmologic instrument and ophthalmologic system equipped with them - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ophthalmologic system to be used either as a portable type or an installed type on the disk according to the case as well as an arm and ophthalmologic instrument for that purpose. SOLUTION: The system is composed of two bars 21, 22 jointed to turn free each other and equipped with an arm 20 of which one end is put held by an optional holder to enable to turn another end 22a free two dimensionally or three dimensionally facing the end as well as a portable ophthalmologic instrument 1 having a main body to measure or observe object eyes. The ophthalmologic instrument 1 has a first joint 4 to be jointed to another end 22a of the arm 20. The arm 20 has also a second joint 30 to joint the ophthalmologic instrument 1 to the another end 22a through the first joint 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arm, an ophthalmic apparatus, and an ophthalmologic system including the same, which are used for measuring an eye to be examined in an ophthalmic clinic or an optician.

[0002]

2. Description of the Related Art Ophthalmic instruments for measuring an eye to be examined are widely used in ophthalmic clinics and spectacle shops. As this ophthalmic apparatus, there are a so-called subjective ophthalmic apparatus for measuring the visual acuity and the like of the eye to be examined, and a so-called objective ophthalmic apparatus for measuring the spherical power, astigmatic power and astigmatic axial power of the eye to be examined. The objective ophthalmic devices are roughly classified into a stationary type and a handheld type.

[0003] A conventional stationary ophthalmic apparatus is such that a subject's jaw and forehead are fixed by a fixture so that the positional relationship between the subject's eye and the ophthalmic apparatus is fixed, and the The alignment of the measurement is performed by finely adjusting the positional relationship between the eye to be inspected and the ophthalmic apparatus by moving only the measuring unit left, right, back and forth. Specifically, as shown in FIGS. 11 and 12, the ophthalmic apparatus 100 includes a base 101 and a slide table 102.
And the measuring unit 103. The sliding table 102 is located in front, rear, left and right with respect to the base 101.
2 can be displaced up and down. A chin rest 104 and a forehead rest 105 are provided on the base 101, and the subject's chin is placed on the chin rest 104.
5 is assigned to the forehead of the subject. By doing so, the positional relationship between the base 101 and the subject is fixed. Further, in this state, the subject sees the fixation target (not shown) inside the measurement unit 103 to ensure the stability of the subject's eye.

The measurer moves the slide table 102 and the measuring unit 103 using the operation stick 107 while watching the eye to be inspected displayed on the display unit 106, so that the optical axis of the measuring unit 103 and the eye to be inspected are moved. Alignment was done to fit. After completion of the alignment, the spherical power, astigmatic power, and astigmatic axial power of the subject's eye were measured.

Further, such a stationary ophthalmic apparatus 100
In, the interpupillary distance of the subject's eye was measured as necessary. This is to measure the horizontal position of the measuring unit 103 with respect to the base 101 when measuring one of the right and left eyes to be examined, and to measure the horizontal position of the measuring unit 103 with respect to the base 101 again when measuring the other eye to be examined. Then, it is easily calculated from the difference between the horizontal position measured first and the horizontal position measured later.

[0006] Such a stationary ophthalmologic apparatus 100 includes:
It is often installed on a table, but if it is installed fixedly, it occupies space on the table, which is not preferable. Therefore, as described in JP-A-3-280926,
The ophthalmic apparatus 100 is installed movably with respect to the table,
It has also been proposed to evacuate the table when the ophthalmic device 100 is not used.

On the other hand, a conventional hand-held ophthalmic apparatus is a type in which alignment is performed by freely moving the entire apparatus without fixing the head of the subject. Specifically, FIG.
As shown in FIG. 3, the ophthalmologic apparatus 110 includes a housing 111 and a holding portion 112 projecting downward from the housing 111. The ophthalmic apparatus 110 is a
On the other hand, it is greatly different in that a chin rest and a forehead rest for fixing the positional relationship between the subject's eye and the ophthalmic apparatus are not provided, and the measurer looks at the subject's eye displayed on the display unit 113 while looking at the subject's eye. Ophthalmic equipment 11 according to the posture of the subject
The alignment was adjusted by displacing the entire zero. After completion of the alignment, the spherical power, astigmatic power, and astigmatic axial power of the subject's eye were measured. Such a hand-held ophthalmic device is also described in Japanese Patent Application Laid-Open No. 2-5920.

However, unlike the stationary ophthalmic apparatus 100, the hand-held ophthalmic apparatus 110 does not have a reference portion in the horizontal direction, and therefore cannot measure the interpupillary distance of the eye to be examined. Was.

[0009]

However, in the above-mentioned stationary ophthalmic apparatus, the positional relationship between the ophthalmic apparatus and the subject's eye is fixed, so that stable measurement can be performed, but the specific subject's eye can be stably measured. In some cases, the eye to be examined could not be measured. For example, children, the elderly, and wheelchair users have difficulty placing the chin on the chin rest, and thus sometimes cannot measure the eye to be examined. In addition, it takes time to move the slide table and the measurement unit largely, which is a factor that increases the time required for the entire measurement.

Further, in the case of a stationary ophthalmic apparatus, there is a problem that the space on the table is occupied as described above, which is not preferable. Each time the user moves, the documents on the table, the arm of the subject, and the like must be removed, which is not convenient.

On the other hand, hand-held ophthalmic equipment is excellent in portability and freedom of operation, but since the ophthalmic equipment and the eye to be examined are not fixed to each other, the positions of the ophthalmic equipment and the eye to be examined are different from each other. The relationship has changed, and there has been a problem that the alignment is difficult to perform as compared with a stationary ophthalmic apparatus, or the alignment is once shifted immediately.

[0012] Further, since the hand-held ophthalmic apparatus does not have a portion serving as a reference in the horizontal direction, the interpupillary distance cannot be measured unlike a stationary ophthalmic apparatus.

As described above, the stationary type and the hand-held type have advantages and disadvantages, and it is preferable to provide both devices in order to cope with all subjects. However, providing two types of devices having almost the same function puts a heavy burden on users.

The present invention has been made in view of the problems in such conventional ophthalmic apparatuses, and provides an ophthalmic apparatus which can be used as a hand-held type or as a stationary type as required. The purpose is to do.

[0015]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems in the conventional ophthalmic apparatus, the present invention according to claim 1 is formed of a single rod or a plurality of rods which are displaceably linked to each other. An arm whose one end is supported by an arbitrary supporting object and whose other end is capable of being displaced in a two-dimensional or three-dimensional direction with respect to the one end, and a main body that measures or observes an eye to be examined. Having a hand-held ophthalmic device having, the ophthalmic device having first connection means connected to the other end of the arm, and the arm having, at the other end, the first connection means And a second connection means for connecting the ophthalmic apparatus via the.

According to a second aspect of the present invention, in the first aspect of the present invention, the ophthalmic apparatus outputs a measured value obtained by measuring the eye to be inspected or an image of the eye to be inspected. The arm, the input means for inputting the measurement value or the image of the eye to be inspected output from the first output means of the ophthalmic apparatus, and the measurement value or the said input through the input means And second output means for outputting an eye image to be inspected.

The present invention according to claim 3 provides the invention according to claim 1 or 2
In the present invention described, the arm has a power supply unit for supplying power to the ophthalmic device,
A battery that supplies power to the measurement unit, a connection state determination unit that determines whether or not the battery is connected to the arm, and if the connection state determination unit determines that the battery is connected to the arm, Power is supplied from the power supply unit of the arm to the main unit and the battery, and when it is determined that the arm is not connected to the arm by the connection state determination unit, the power is supplied from the battery to the main unit. And a power switching unit that performs the switching.

The present invention described in claim 4 provides the present invention according to claims 1 to 3
In the present invention described above, the rod of the arm is provided with a displacement measuring means for measuring a displacement between the rods or between the rod and the support target, and the ophthalmic apparatus is measured by the displacement measuring means for the arm. It is characterized by having distance calculating means for calculating an interpupillary distance of the eye to be inspected based on the amount of displacement obtained.

The present invention described in claim 5 provides the invention according to claims 1 to 4.
In the present invention described above, the arm is attachable to a fixed shaft for fixing a subjective ophthalmoscope.

According to a sixth aspect of the present invention, there is provided one rod or a plurality of rods which are displaceably linked to each other, one end of which is supported by an arbitrary supporting object and the other end of which is the one end. A connecting means for connecting a hand-held ophthalmic device for measuring or observing an eye to be examined to the other end, the arm being capable of being displaced in a two-dimensional direction or a three-dimensional direction with respect to the arm; It is characterized by having input means for inputting a measurement value or a subject's eye image output from the apparatus, and output means for outputting the measurement value or the subject's eye image input via the input means.

According to a seventh aspect of the present invention, there is provided a hand-held ophthalmic apparatus having a main body for measuring or observing an eye to be inspected, wherein the connecting means is connected to an arm which can be displaced in a two-dimensional direction or a three-dimensional direction. And output means for outputting the measured value or the eye image measured by the main body to the arm.

[0022]

An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing the entire ophthalmic system according to the present embodiment, and FIG.
FIG. 3 is a block diagram of the entire ophthalmologic system. In each of these figures, the ophthalmic system
It is configured to include an arm 20 supported by an arbitrary support target and a hand-held ophthalmic apparatus 1 that measures or observes the eye E to be examined and is separated or connected to the arm 20.

First, the configurations of the ophthalmic apparatus 1 and the arm 20 in the present ophthalmologic system will be described, and then the measurement or observation operation in the present ophthalmic system will be described. The ophthalmologic apparatus 1 according to the present embodiment is formed as an eye-refractive-power measuring device that measures the spherical power, astigmatic power, and astigmatic axial power of the eye E based on the principle of a so-called image analysis method. Regarding this measurement principle and the optical system for performing measurement based on the principle,
For example, it is described in detail in Japanese Patent Application Laid-Open No. 55-86437 by the present applicant.

As shown in FIGS. 1 and 3, the ophthalmologic apparatus 1 has a main body 2, a storage unit 3, a first connection unit 4 as a first connection unit, and a connection state determination unit as a connection state determination unit. Part 5
And a device-side contact group 6, a power unit 7, an output unit 8, and a control unit 9.

The main body 2 is for measuring the eye to be inspected based on the above-mentioned image analysis method, and includes an optical system (not shown) for projecting and receiving light with the eye to be inspected E. The light received by the optical system is processed and calculated, and a measured value is obtained and output to the control unit 9. The main body 2 is also for observing the subject's eye E in order to grasp whether or not the subject's eye E is in a state where an appropriate measurement can be performed or to perform alignment. The obtained eye image is output to the output unit 8.

The storage section 3 stores the measured values measured by the main body section 2 and the displacement amounts measured by rotary encoders 28 and 29 of the arm 20, which will be described later.

As shown in FIG. 1, the first connecting portion 4 as a first connecting means is connected to the arm 20. The first connecting portion 4 is provided below the housing of the ophthalmic apparatus 1 to lift the ophthalmic apparatus 1 with one hand. Projected as a grip. The first connection portion 4 has a sufficient strength to support the ophthalmic apparatus 1 and has a shape that can be easily grasped by a measurer. A connection hole (not shown) is formed around the first connection portion 4 on the lower surface of the housing of the ophthalmologic apparatus 1. This connection hole will be described later.

The connection state discriminating section 5 which is a connection state discriminating means.
Is for determining whether or not the ophthalmic apparatus 1 is connected to the arm 20, and is provided as a contact switch around the first connection portion 4 on the lower surface of the housing of the ophthalmic apparatus 1. The connection state discrimination unit 5 is configured such that the ophthalmic device 1
When it is connected to 0, it is pressed by the arm 20 and outputs an “ON” signal to the control unit 9. On the other hand, when the ophthalmic apparatus 1 is not connected to the arm 20, the arm 20 releases the pressing and outputs an “OFF” signal to the control unit 9. Thus, it is determined whether or not the ophthalmic apparatus 1 is connected to the arm 20.

The device-side contact group 6 is a group of contacts for transferring measured values, an eye image to be examined, or power between the ophthalmic device 1 and the arm 20, and is similar to the connection state determining unit 5 described above. Is provided around the first connection portion 4 on the lower surface of the housing of the ophthalmologic apparatus 1.

As shown in FIG. 3, the power unit 7 includes a control unit 9
The power is supplied to the main body 2 via the power supply, and includes a battery 10 and a power switching unit 11 as power switching means. The battery 10 includes the main body 2
This is a storage battery built in the ophthalmologic apparatus 1 for supplying power to the power supply, and also stores the power when power is supplied to itself.

The power switching unit 11 serving as power switching means is supplied from a power supply unit 24 of the arm 20 described later when the connection state determination unit 5 determines that the ophthalmic apparatus 1 is connected to the arm 20. The supplied power is supplied to the main unit 2, the storage unit 3, the output unit 8, the control unit 9, and the battery 10,
When the connection state determination unit 5 determines that the ophthalmic apparatus 1 is not connected to the arm 20, power is supplied from the battery 10 to the main unit 2.

The output section 8 outputs the measured values and the eye image obtained by the main body 2 and has a display section 12 and a measured value output section 13 as a first output means. The display unit 12 displays the image of the eye to be examined and measured values to the measurer, and is provided on the upper part of the housing of the ophthalmologic apparatus 1. The measurement value output unit 13 as a first output unit outputs the measurement value and the image of the eye to be inspected via the device-side contact group 6.

The control unit 9 includes the main unit 2 and the storage unit 3
, Connection state determination unit 5, device side contact group 6, power unit 7
And the output unit 8. The control unit 9 is provided with a distance calculation unit 14 as a distance calculation unit. This distance calculation unit 14 is based on a displacement amount measured by rotary encoders 28 and 29 of the arm 20 described later.
The interpupillary distance of the subject's eye is calculated. Details of the distance calculation unit 14 will be described later.

Next, the structure of the arm 20 will be described.
The arm 20 has two rods 21 and 22, an arm-side contact group 23, and a power supply unit 24 as a power supply unit. As shown in FIG. 1, the two rods 21 and 22 are linked to each other so as to be displaceable with each other, and have sufficient strength to support the ophthalmic apparatus 1. The rod 21 is rotatably supported by a support shaft 50 at one end 21a (a base of the entire arm 20) on the support shaft 50 side through a bearing so as to be rotatable about 360 degrees in a horizontal plane. . Further, the rod 22 is different from the rod 21 in that the rod 2
One end 22a is rotatably supported by about 360 degrees in a horizontal plane via a bearing, and the other end 22b (the end of the entire arm 20) is free and not fixed anywhere. ing.

As shown in FIG. 2, the rod 21 is composed of a member 25 and a member 26, and these members are rotatably supported at their ends to form parallel links. Therefore, the member 25 and the member 26 can be inclined while always maintaining the parallelism with each other, and as a result, the arm 20 can be displaced in the three-dimensional direction with respect to the distal end 22b with respect to the base 21a. I have.

A spring 27 is attached to the rod 1 such that the oblique ends of the member 25 and the member 26 are pulled toward each other. The elastic force of the spring 27 and the downward load applied to the rod 21 are applied. By balancing, the amount of inclination of the rod 21 is regulated. Therefore, by selecting the strength of the spring 27, even when the ophthalmologic apparatus 1 is connected to the rod 22 as described later, it is possible to balance the ophthalmologic apparatus 1 so as to match the weight of the ophthalmologic apparatus 1. Will be possible. That is, the ophthalmologic apparatus 1 can be stopped at a free height.

The rods 21 and 22 of the arm 20 are provided with each other or with the rod 21 and the support shaft 50.
In order to measure mutual displacement, rotary encoders 28 and 29 as displacement measuring means are provided. Specifically, a rotary encoder 28 for measuring a relative angle between the rod 21 and the support shaft 50 is provided at an end of the rod 21 on the support shaft 50 side, and an end of the rod 21 on the rod 22 side is provided. The portion is provided with a rotary encoder 29 for measuring a relative angle between the rods 21 and 22. The relative angles measured by the rotary encoders 28 and 29 in this manner are output to the control unit 9 of the ophthalmologic apparatus 1 via the arm-side contact group 23 and the device-side contact group 6 described later.

As shown in FIG. 1, a second connecting portion 30 as a second connecting means is formed at the tip of the rod 22. The second connection portion 30 connects the ophthalmic device 1 and is provided as a holding hole having a shape capable of penetrating and holding the first connection portion 4 of the ophthalmic device 1 formed as a grip. ing. Also, the second connecting portion 30
A connection pin 31 that fits into the connection hole is formed at a position corresponding to the connection hole of the ophthalmic apparatus 1 around
When the ophthalmic apparatus 1 is connected to the arm 20, the connection pins 31 are fitted into the connection holes, so that the positional relationship between the arm 20 and the ophthalmic apparatus 1 is always kept constant.

An operation rod 32 for displacing the rods 21 and 22 to a free position is mounted on one side surface of the distal end portion 22b of the arm 20. A monitor 33 is provided for displaying a measurement value output via the side contact group 6 and the arm side contact group 23 and an image of the eye to be inspected.

The arm-side contact group 23 is a set of contacts for transferring measured values, an eye image to be examined, or power between the ophthalmic apparatus 1 and the arm 20, and is an input means. The arm-side contact group 23 is provided at a position corresponding to the device-side contact group 6 of the ophthalmologic apparatus 1 around the holding hole at the distal end of the rod 22.

As shown in FIG. 3, the power supply section 24 is for supplying power to the ophthalmic apparatus 1, and has a charging circuit 34 and an AC-DC conversion circuit 35. The charging circuit 34 is for charging the battery of the ophthalmologic apparatus 1, and in a state where the ophthalmic apparatus 1 is connected to the arm 20, via the arm-side contact group 23 and the device-side contact group 6,
Connected to battery.

The AC / DC conversion circuit 35 is for supplying electric power for operating the ophthalmic apparatus 1 while the ophthalmic apparatus 1 is connected to the arm 20. The AC
The / DC conversion circuit 35 is connected to the power switching unit 11 of the ophthalmologic apparatus 1 via the arm-side contact group 23 and the device-side contact group 6.

Next, the measuring operation in the ophthalmic system will be described. First, a case where the ophthalmic apparatus 1 is separated from the arm 20 will be described. In such a case, the measurer performs the same measurement operation as that of the normal ophthalmologic apparatus 1. That is, the measurer performs alignment while confirming the positional relationship between the eye to be inspected and the ophthalmologic apparatus 1 and measures the eye to be inspected. At the time of the alignment and the measurement, an image of the eye to be examined and measured values are displayed on the display unit 12 of the ophthalmologic apparatus 1.

Here, whether or not the ophthalmic apparatus 1 is connected to the arm 20 is always determined by the connection state determining unit 5 of the ophthalmic apparatus 1, and the result of this determination is input to the control unit 9 of the ophthalmic apparatus 1. Have been. Then, the control unit 9 controls the power switching unit 11 of the power unit 7 according to the determination result input from the connection state determination unit 5. Specifically, when the ophthalmic apparatus 1 is not connected to the arm 20 as described above, the connection state determination unit 5 formed as a contact switch controls the “OFF” signal because the connection state determination unit 5 is not pressed from the arm 20. Output to the unit 9. The control unit 9 receiving such an “OFF” signal controls the power switching unit 11 and switches the contacts in the power switching unit 11 so as to connect the battery 10 in the ophthalmic apparatus 1 and the main unit 2. Power is supplied from the battery 10 to the main body 2. The main body 2 performs measurement using the power supplied from the battery 10.

Next, the case where the ophthalmic apparatus 1 is connected to the arm 20 will be described. The ophthalmologic apparatus 1 is connected to the arm 20 by the measurer placing the first connection section 4 of the ophthalmic apparatus 1 in the second connection section 30 of the arm 20. Here, the first connection part 4 is formed with a slightly smaller diameter than the second connection part 30, and the first connection part 4 can be easily accommodated in the second connection part 30. On the other hand, the connection pin 31 of the arm 20 fits into the connection hole of the ophthalmic device 1,
The positional relationship between the ophthalmic apparatus 1 and the arm 20 is easily constant. Therefore, in this connection, the arm 2
The device-side contact group 6 of the ophthalmologic apparatus 1 is securely connected to the 0-arm-side contact group 23, and it is possible to exchange measured values and power between the arm 20 and the ophthalmologic apparatus 1 via these.

When the ophthalmologic apparatus 1 is connected to the arm 20 in this manner, the connection state determining unit 5 of the ophthalmic apparatus 1 determines that the ophthalmic apparatus 1 is connected to the arm 20, and the result of this determination is based on the ophthalmic apparatus. 1 to the control unit 9. Then, the control unit 9 controls the power switching unit 11 of the power unit 7 according to the determination result input from the connection state determination unit 5. Specifically, when the ophthalmic apparatus 1 is connected to the arm 20 as described above, the connection state determination unit 5 formed as a contact switch is pressed by the arm 20 and sends an “ON” signal to the control unit 9. Output. The control unit 9 that has received such an “ON” signal controls the power switching unit 11 and sets a contact in the power switching unit 11 so as to connect the AC-DC conversion circuit 35 of the arm 20 and the main unit 2. Switching and power supply from the AC-DC conversion circuit 35 to the main unit 2.

The main unit 2 includes an AC-DC conversion circuit 3
The measurement is performed using the power supplied from No. 5. At the same time, the control unit 9 controls the power switching unit 11 and
The contact in the power switching unit 11 is switched so as to connect the charging circuit 34 to the battery 10 of the ophthalmologic apparatus 1, and power is supplied from the charging circuit 34 to the battery 10. The battery 10 stores the power supplied from the charging circuit 34 in itself. Therefore, when the ophthalmic apparatus 1 is connected to the arm 20, the measurement can be performed without consuming the power of the battery 10 of the ophthalmic apparatus 1, and further, the battery 10 is charged and used in the next separated state. Can be prepared.

As described above, in a state where the ophthalmic apparatus 1 is connected to the arm 20 and power is supplied to the ophthalmic apparatus 1 from the arm 20, the measurer adjusts the alignment. The adjustment of the alignment is performed by the operation rod 3 of the arm 20.
This is performed by moving the rods 21 and 22 up, down, left and right through the position 2 to move the ophthalmic apparatus 1 at the distal end 22b to a predetermined position with respect to the eye to be examined.

When the alignment adjustment is completed, the measurer operates a measurement start switch (not shown). Then
The control unit 9 instructs the main unit 2 to start measurement, the eye E to be measured is measured by the main unit 2, and the measured value and the image of the eye to be inspected obtained by the main unit 2 are output to the control unit 9. . The measurement values and the eye image output to the control unit 9 in this manner are output to the measurement value output unit 13, and are output from the measurement value output unit 13 via the device-side contact group 6 and the arm-side contact group 23. Arm 20
Is output to Then, the measurement values and the eye image output to the arm 20 are input to the monitor 33 and displayed on the monitor 33. Therefore, the measurer can see the measured value and the image of the subject's eye on the large monitor 33 of the arm 20 instead of the small display unit 12 of the ophthalmologic apparatus 1, and the ease of measurement is improved.

Next, the operation of calculating the interpupillary distance of the subject's eye using the present ophthalmic system will be described. This operation is based on the assumption that the ophthalmic apparatus 1 is connected to the arm 20. First, the ophthalmic apparatus 1 is connected to the arm 20, and the left and right subject's eyes EL and ER are measured one by one by a measurer's operation. FIG. 4 shows a state in which the right eye ER is being measured.
Shown in In this state, when the measurer operates a measurement start switch (not shown), the control unit 9 instructs the main body 2 to measure the eye E, as described above, and the device-side contact group 6 and the arm-side contact group. Arm 2 through 23
It instructs the 0 rotary encoders 28 and 29 to output the displacement amount. Then, the rotary encoders 28 and 29 of the arm 20 output the displacement amounts at that time to the control unit 9 of the ophthalmologic apparatus 1 via the arm-side contact group 23 and the device-side contact group 6. Then, the displacement amount output to the control unit 9 is sent from the control unit 9 to the storage unit 3 and stored in the storage unit 3.

The amount of displacement at the time of measurement of the right eye ER is determined by the relative angle between the rod 21 and the support shaft 50 being the angle α.
R, it is assumed that the relative angle between the rod 21 and the rod 22 is the angle βR. In FIG. 4, P1, P2, and P3 are:
The center of rotation of the rod 21 on the support shaft 50 side and the rod 2
The center of rotation of the second rod 21 and the center of the tip 22b are shown.

FIG. 5 shows a state in which the left eye EL is being measured. In this state, as in the case of the right eye ER, when the measurer operates the measurement start switch, the control unit 9 instructs the main body 2 to measure the eye E as described above, and , And instruct the rotary encoders 28 and 29 to output the displacement amount.
Then, the displacement amounts at that time are output from the rotary encoders 28 and 29 to the control unit 9 of the ophthalmologic apparatus 1. Then, when the displacement amount is output to the control unit 9 in this way, the control unit 9 outputs the displacement amount at the time of EL measurement of the left eye E to the distance calculation unit 14 and stores the displacement amount in the storage unit 3. The displacement amount at the time of ER measurement of the right eye E is called and the distance calculation unit 14 is called.
Output to

The amount of displacement at the time of EL measurement of the left subject's eye is the relative angle between the rod 21 and the support shaft 50 is the angle α.
L, it is assumed that the relative angle between the rod 21 and the rod 22 is the angle βL. In FIG. 5, P1, P2, and P3 are:
The center of rotation of the rod 21 on the support shaft 50 side and the rod 2
The center of rotation of the second rod 21 and the center of the tip 22b are shown.

The distance calculating section 14 having output the displacement amounts at the time of measuring both the left and right eyes to be examined calculates the distance between the pupils of the eyes EL and ER based on the displacement amounts. Specifically, first, a relative angle γR and a distance LR between P1 and P3 in FIG. 4 are obtained based on the displacement amount at the time of measuring the right eye ER. This is, as shown in FIG.
It is easily calculated from R, the angle βR, the length L1 of the rod 21 and the length L2 of the rod 22.

[0055]

(Equation 1)

[0056]

(Equation 2)

Similarly, the relative angle γL and the distance LL between P1 and P3 in FIG. 5 are obtained based on the displacement at the time of the left eye EL measurement. This is the above equation 1,
The angle αR and the angle βR in Equation 2 are respectively represented by an angle α
It is easily calculated by substituting L and the angle βL. The relative angles γR, γL, and the distance L thus calculated
FIG. 7 shows the mutual positional relationship between P1, P3, and P5 using R and LL. In FIG. 7, the center P3 and the center P5
Are relative angles γR, γL, and distance L
It is easily calculated based on R and LL.

[0058]

(Equation 3)

4 and 5, the distance X is equal to the mutual distance PD between the eyes EL and ER, that is, the interpupillary distance. As a result, the interpupillary distance was calculated. become. Thus, the distance calculation unit 14
The pupil distance calculated by the above is output to the control unit 9 and displayed on the display unit 12 via the control unit 9.

Although one embodiment of the present invention has been described above, the present invention may be embodied in various different forms within the substantially same technical idea as the above-described embodiment. is there. Hereinafter, the different modes will be described. First, in the above-described embodiment, the ophthalmologic apparatus has been described as an eye refractive power measuring apparatus. However, the ophthalmologic apparatus is not limited to this, and may be an ophthalmic diagnostic apparatus such as a slit lamp. In the above embodiment,
Although the support object that supports the rod 21 has been described simply as the support shaft 50, the support shaft 50 may be a fixed shaft that fixes the subjective optometer. In general, the subjective ophthalmoscope has a fixed shaft, so that the present ophthalmological system and the subjective ophthalmoscope may be provided vertically so that the base 21a of the arm can be fixed to the fixed shaft. In particular, when the ophthalmic apparatus 1 is an eye refractive power measuring device, by providing the eye refractive power measuring device and the subjective optometer together, it is possible to easily perform continuous measurement by using these sequentially. . In this case, the fixing structure of the base 21a of the arm may be, for example, the base 21a
Can be achieved by using a split flange that holds a fixed shaft for fixing the subjective ophthalmoscope.

The measured values and the eye image output to the arm 20 via the measured value output unit 13 of the ophthalmic apparatus 1 are stored in the arm 2
The output may be performed not only to the monitor 33, but also to an external device such as a printing device or a personal computer as a second output unit. Further, data and images other than the measured values and the image of the eye to be inspected may be output to the monitor 33 or an external device.

Further, as the form of the arm 20 for realizing the two-dimensional or three-dimensional displacement, the form shown in FIGS. The arm 35 shown in FIG. 8 is obtained by further adding a third rod 36 between the rods 21 and 22 of the arm 20 shown in FIG. 1, so that a more flexible displacement is possible. Although not shown, in the arm 35, rotary encoders are provided at both ends of the rod 21 and ends of the rod 22 on the rod 36 side.

The arm 37 shown in FIG.
, A rod 39, a slide shaft 40, and a connecting portion 41. This vertical axis 38 is, as shown in FIG.
The balance between the elastic force of the spring 42 and the downward load applied to the vertical shaft 38 is maintained. Therefore, as in the case of the arm 20, if it is stopped at a free position, it can be stopped as it is. The rod 39 is rotatably mounted on a vertical shaft 38, and the slide shaft 40 is
It is integrally attached to.

A connecting portion 41 is attached to the slide shaft 40 so as to be slidable in parallel with the slide shaft 40. Although not shown, in the arm 37, a rotary encoder is provided at both ends of the rod 39 and the connecting portion 41. Also, when using an arm having a form such as these arms 35 and 37,
The distance between the pupils of the subject's eyes EL and ER is calculated by the distance calculation unit 14 based on the displacement amounts of the members constituting these arms.
It is appropriately changed according to the content of the displacement measured by the rotary encoder.

[0065]

As described above, according to the first aspect of the present invention, one end is supported and the other end is displaceable in two-dimensional or three-dimensional directions with respect to one end. An arm and a hand-held ophthalmic device for measuring or observing the eye to be examined are provided, the ophthalmic device has first connection means connected to the other end of the arm, and the arm is connected to the ophthalmic device. By having the two connecting means, the ophthalmic apparatus can be used in both the hand-held type and the stationary type by separating or connecting the ophthalmic apparatus to the arm. Optimal optometry can be performed according to the condition. Further, since the ophthalmologist does not need to prepare a plurality of ophthalmic devices having the same function, the burden of costs is reduced.

According to a second aspect of the present invention, the ophthalmic apparatus has first output means for outputting a measured value obtained by measuring the eye to be inspected or an image of the eye to be inspected. By having an input means for inputting the measurement value or the eye image to be output from the first output means, and a second output means for outputting the measurement value or the eye image to be input through the input means, The measurement values and the eye image to be inspected measured by the main body of the ophthalmic apparatus can be output to the monitor of the arm or an external device, so that the easiness of measurement and the versatility can be improved.

According to a third aspect of the present invention, the arm has power supply means for supplying power to the ophthalmic apparatus,
The ophthalmic apparatus supplies a battery, a connection state determining unit that determines whether or not the battery is connected to the arm, and supplies power to the main unit and the battery when it is determined that the battery is connected to the arm. If it is determined that the power supply is not connected to the power supply, the power supply means for supplying power from the battery to the main body unit automatically switches the power supply of the ophthalmic apparatus according to the use state. Therefore, when the ophthalmic device is connected to the arm, the measurement can be performed without draining the power of the battery of the ophthalmic device,
Further, the battery can be charged to prepare for use in the next separated state.

Further, according to the present invention, the displacement amount measuring means is provided on the rod of the arm, and the ophthalmic apparatus determines the distance between the pupils of the eye to be examined based on the displacement amount measured by the displacement amount measuring means. By having a distance calculating means for calculating,
The interpupillary distance of the subject's eye, which cannot be achieved by conventional handheld ophthalmic equipment, can be automatically measured.

Further, according to the present invention, the arm can be attached to a fixed shaft for fixing the subjective ophthalmoscope, so that the ophthalmic apparatus and the subjective ophthalmoscope are provided side by side on the same axis. This is extremely convenient when these two devices are used sequentially.

The present invention according to claim 6 is formed of one rod or a plurality of rods which are displaceably linked to each other, one end of which is supported and the other end of which is connected to one end by two. A connecting means for connecting a hand-held ophthalmic apparatus for measuring an eye to be examined to the other end, the arm being capable of being displaced in a three-dimensional direction or a three-dimensional direction, and a measurement value or a measurement value output from the ophthalmic apparatus. By having a measurement value input means for inputting an optometry image and an output means for outputting a measurement value or an eye image to be examined inputted via the measurement value input means, an ophthalmic apparatus can be easily connected and Can output a measurement value or an image of the eye to be examined, and can provide an arm that can easily constitute an ophthalmologic system.

According to a seventh aspect of the present invention, there is provided a hand-held ophthalmic apparatus having a main body for measuring or observing an eye to be inspected, wherein the ophthalmic apparatus is connected to an arm which can be displaced in a two-dimensional direction or a three-dimensional direction. Connection means and a measurement value output means for outputting a measurement value measured by the main body to the arm, so that the measurement value and the eye image to be examined can be easily connected to the arm. An ophthalmologic apparatus that can easily configure an ophthalmic system can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an entire ophthalmic system according to an embodiment of the present invention.

FIG. 2 is a sectional view of a main part of the arm of FIG. 1;

FIG. 3 is a block diagram of an ophthalmologic system.

FIG. 4 is a conceptual diagram illustrating a measurement state of a right eye to be inspected.

FIG. 5 is a conceptual diagram showing a measurement state of a left eye to be examined.

FIG. 6 is a conceptual diagram of distance calculation in an interpupillary distance measuring operation.

FIG. 7 is a conceptual diagram showing a positional relationship between principal points in an interpupillary distance measuring operation.

FIG. 8 is a perspective view of an ophthalmologic system having an arm according to another embodiment.

FIG. 9 is a perspective view of an arm according to another embodiment.

FIG. 10 is a sectional view taken along a vertical axis in FIG. 9;

FIG. 11 is a front view of a stationary ophthalmic apparatus.

FIG. 12 is a side view showing the ophthalmologic apparatus of FIG. 11 together with a subject.

FIG. 13 is a side view showing a hand-held ophthalmic apparatus together with a subject.

[Explanation of symbols]

 ER right eye to be examined EL left eye to be examined 1 ophthalmic apparatus 2 main body 3 storage unit 4 first connection unit 5 connection state determination unit 6 device side contact group 7 power unit 8 output unit 9 control unit 10 battery 11 power switching unit Reference Signs List 12 display unit 13 measured value output unit 14 distance calculation unit 20 arm 21, 22 rod 23 arm side contact group 24 power supply unit 29 rotary encoder 30 second connection unit 32 operating rod 33 monitor 34 charging circuit 35 AC-DC conversion circuit

Claims (7)

[Claims] 1. One rod or a plurality of rods linked to each other so as to be displaceable with each other, one end of which is supported by an arbitrary supporting object and the other end of which is two-dimensionally connected to the one end. An arm capable of being displaced in a three-dimensional direction, and a hand-held ophthalmic device having a main body for measuring or observing an eye to be examined, wherein the ophthalmic device is connected to a second end of the arm. An ophthalmologic system, comprising a connecting means, wherein the arm has, at the other end, a second connecting means for connecting the ophthalmic apparatus via the first connecting means. 2. The ophthalmic apparatus has first output means for outputting a measurement value or an eye image of the eye obtained by measuring the eye to be inspected, and the arm has a first output of the ophthalmic apparatus. Input means for inputting the measurement value or the eye image output from the means, and having second output means for outputting the measurement value or the eye image input via the input means, The ophthalmic system according to claim 1, wherein: 3. The arm has a power supply unit for supplying power to the ophthalmic device, wherein the ophthalmic device determines whether or not the battery for supplying power to the measuring unit is connected to the arm. Connection state determining means for determining, and when it is determined that the arm is connected to the arm by the connection state determining means, power is supplied from the power supply means of the arm to the main body and the battery, and the connection is performed. 3. The power supply device according to claim 1, further comprising: a power switching unit configured to supply power from the battery to the main body when the state determination unit determines that the arm is not connected to the arm. 4. Ophthalmic system. 4. An arm rod is provided with a displacement measuring means for measuring a displacement between the rods or between the rod and the supporting object, and the ophthalmic apparatus is measured by the displacement measuring means for the arm. The ophthalmologic system according to any one of claims 1 to 3, further comprising a distance calculating unit configured to calculate a distance between pupils of the eye to be inspected based on the displacement amount. 5. The ophthalmologic system according to claim 1, wherein the arm is attachable to a fixed shaft for fixing a subjective ophthalmoscope. 6. One rod or a plurality of rods linked to each other so as to be displaceable relative to each other, one end of which is supported by an arbitrary supporting object and the other end of which is two-dimensionally connected to said one end. An arm capable of being displaced in a three-dimensional direction, a connection means for connecting a hand-held ophthalmic apparatus for measuring or observing the eye to be examined to the other end, and a measurement value output from the ophthalmic apparatus or An arm, comprising: input means for inputting a subject's eye image; and output means for outputting the measurement value or the subject's eye image input via the input means. 7. A hand-held ophthalmologic apparatus having a main body for measuring or observing an eye to be examined, wherein the connecting means is connected to an arm which can be displaced in a two-dimensional direction or a three-dimensional direction; Output means for outputting a measured value or an eye image to the arm to the arm.