JPH06165755A - Optometry apparatus - Google Patents

Abstract

PURPOSE:To select an optical path, to make a special examination such as deep sight besides vision examination and to dispense with a special space by driving a reflective member. CONSTITUTION:A light flux of a vision table projecting apparatus 15 constituting the first target for vision examination is projected on a screen plate 18 through the first mirror 16 and the second mirror 17. An image 19 of the projected vision table passes on an optical axis O through the second mirror 17, the first mirror 16, the third mirror 20, a transparent glass G and the fourth mirror 21 positioned on a mirror cover 14 can be confirmed by an eye 1 to be examined. In addition, a three bars metering test apparatus 23 for examination of deep sight is positioned on the vision table and it is constituted as the second target part. The three bars metering test apparatus 23 is illuminated by an illuminating light source 24. A light flux for the target passes through the optical axis through the fifth mirror being rotatable provided between the third mirror 20 and the fourth mirror 21, the transparent glass G and the fourth mirror 21 and reaches the eye 1 to be examined. The first target part and the second target part are easily switched by rotating the fifth mirror 22 by driving of a motor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optometry apparatus, and more particularly to a space-saving optometry apparatus in which an inspection distance is bent by a mirror or the like to save a space as a whole.

[0002]

2. Description of the Related Art A space-saving type optometry apparatus in which an optical path is bent by a mirror or the like is known as an optometry apparatus for effectively utilizing a store space of an eyeglass store. Although various types have been proposed for this, only the tests that are indispensable for eyeglass adjustment, such as naked eye visual acuity, corrected visual acuity, and binocular visual function, can be inspected by this device. Further, as a deep vision test, a triode test device is known. This device is configured as an independent device that requires a relatively large space, and is installed only in a very limited place such as a hospital or a driver's license examination site.

[0003]

By the way, one of the motivations for newly wearing or replacing eyeglasses is to obtain or renew a driver's license.
Large-scale licenses are required to have a deep-vision test at a prescribed level. When wearing glasses with such a motive,
Even if an appropriate value for the corrected visual acuity is obtained, there is a case in which an appropriate deep visual acuity cannot be obtained in some cases, and there is a problem that this is only revealed after the fact. In addition, it is necessary to dispose them independently in order to perform both inspections, which causes a space problem and is extremely complicated. Furthermore, deep vision is one of the important visual functions that we use on a daily basis even if it is not a special requirement for qualification, and it is extremely useful to know our own characteristics, but this characteristic is It is extremely inconvenient to be able to inspect only in a special place. SUMMARY OF THE INVENTION In view of these drawbacks, an object of the present invention is to provide an optometry apparatus capable of easily performing a special test such as a deep visual acuity in addition to a general visual acuity test without requiring a special space.

[0004]

The present invention is characterized by having the following configuration in order to achieve the above object. (1) Different in the optometry apparatus that secures a predetermined examination distance by guiding the target luminous flux of the first target presenting unit that presents the general visual acuity test target to the subject's eye through the reflecting member. The optical flux of the second optotype presenting unit for inspecting the visual function is guided to the eye to be inspected by using a part of the reflecting member, and the optical flux of the first optotype presenting unit is changed. It is characterized in that selection means for selectively guiding light to the eye to be inspected is provided.

(2) An optometry apparatus characterized in that the second optotype section of (1) is a trigonometric test apparatus for a deep vision test.

(3) The selecting means of (1) is an optical path selecting means for selecting an optical path by driving the reflecting member.

(4) The selection means of (1) is characterized in that the optical paths of the first and second optotype presenting sections are coaxial with each other by a harf mirror, and the illumination light sources are switched and selected.

[0008]

[Embodiment 1] FIGS. 1 to 3 are schematic layout diagrams of an optometry apparatus according to an embodiment of the present invention. FIG. 1 is a top view, FIG. 2 is a front view, and FIG. It is a figure. The present apparatus is roughly configured by an optometry table 2, an objective refraction test apparatus 7, a subjective optometry apparatus 5, a visual acuity table 13, and a control unit.
Reference numeral 1 is an eye to be inspected, and 2 is an eye examination table. Optometry table 2
A pole 3 is fixedly attached to the arm 3, and the pole 3 supports an arm 4. The arm 4 is for suspending the subjective optometry apparatus 5. The arm 4 that suspends the subjective optometry apparatus 5 is rotatable around the pole 3, and the shaft 6 fixed to the arm 4 is slidable up and down inside the pole 3. 5 can be retracted from the front of the subject's eyes. Reference numeral 7 denotes an objective refraction test device, which moves along the end of the optometry table 2. The moving mechanism of the objective refraction inspection apparatus will be described with reference to FIG. FIG. 4 is a cross-sectional view including the objective refraction inspection apparatus 7 and the top plate 8 of the optometry table 2. The objective refraction inspection apparatus 7 is on a tray 9, and a roller 10 is interposed between the tray 9 and the top plate 8. The top plate 8 can be moved in the longitudinal direction.
An arm 11 is fixedly mounted on the end surface of the tray 9,
Is wrapped around the side surface of the top plate 8 and is connected to the linear guide 12 on the back surface of the top plate 8. The objective refraction inspection apparatus 7 can be moved in a direction parallel to the longitudinal direction of the top plate 8. Also,
By inserting a signal cable for connecting the subjective eye examination device 5 and the objective refraction inspection device 7 and a power cable for the objective refraction inspection device 7 inside the arm 11, the objective refraction device can be provided without exposing the cable to the outside. The measurement data of the inspection device 7 can be sent to the subjective eye examination device 5.

A mirror cover 1 is provided on the visual acuity table 13.
4 is arranged, and the subject looks at the visual acuity table inside the visual acuity table via the mirror in the front mirror cover 14.
Reference numeral 0 in FIG. 1 indicates an optical axis at which the subject looks at the visual acuity chart. An optical system as shown in FIG. 5 is arranged inside the visual acuity table 13.

The structure of the first optotype portion for presenting the optotype for the visual acuity test is as follows. Sight chart projection device 15
The projection optical path of is indicated by A. The light flux of the visual acuity chart projector 15 is projected onto the screen plate 18 via the first mirror 16 and the second mirror 17. The projected image 19 of the visual acuity chart passes on the optical axis 0 through the second mirror 17, the first mirror 16, the third mirror 20, the transparent glass G and the fourth mirror 21 arranged on the mirror cover 14, It can be confirmed by optometry 1. Further, on the visual acuity table 13, a trigonometer test device 23 for performing a deep visual acuity test is arranged and configured as a second optotype section. The triode tester 23 is illuminated by an illumination source 24 and the optical path is shown as B. The target luminous flux reaches the eye 1 through the optical axis 0 through the rotatable fifth mirror 22 provided between the third mirror 20 and the fourth mirror 21, the transparent glass G, and the fourth mirror 21. . The first optotype part and the second optotype part can be easily switched by rotating the fifth mirror 22 by driving the motor. The fifth mirror 22 may be a half mirror, and the visual acuity chart projection device 15 and the illumination light source 24 may be switched on.

[0011]

Second Embodiment FIG. 6 is a schematic layout diagram of an optometry apparatus according to a second embodiment of the present invention. The present apparatus is generally composed of an optometry table 2a, a back illumination type optotype presenting apparatus 15a as a first optotype section, and a casing 24 in which a triaxial test apparatus 23 is incorporated as a second optotype section. The housing 24 has a rotatable reflection mirror 22.
a is provided. The light flux of the first optotype unit 15a has the optical path A
It can be confirmed by the eye 1 to be inspected through the reflection mirror 22a. The optical path of the triode tester 23 is indicated by B ',
It can be confirmed by the eye 1 to be inspected through the reflection mirror 22a. The rotation angle of the reflecting mirror 22a is changed by driving the motor based on the switching signal of the input unit, and the targets of the first optotype unit and the second optotype unit are switched and presented. The rotation angle may be fixed in advance, but when the fifth mirror 22 (reflection mirror 22a) can be adjusted according to the height of the eye to be examined as in the first embodiment, the height of the eye to be examined is adjusted. , First optotype section and second
It may be calculated from the position of the optotype portion (it is of course possible to store this in a table beforehand).

[0012]

Third Embodiment FIG. 7 is a schematic layout diagram of an optometry apparatus according to a third embodiment of the present invention. The device of the third embodiment is different from the device of the second embodiment in that the main difference is that the target luminous flux of the target presenting device 15a is introduced into the housing 24a, and the triaxial test device 2 is internally operated.
This is a point that is coaxial with the light flux of 3. Target presenting device 15
The optical path of a is shown as A ″, and its luminous flux is the first mirror 2
At 5 the inside of the housing 24a is entered. The optical path A ″ is the second mirror 25.
a, the third mirror 22b is bent, and the fifth mirror 26 bends the optical path B ″ of the triode tester 23. The third mirror 22b rotates to be inserted into and removed from the optical path,
The target luminous fluxes of the first target portion and the second target portion are selectively guided to the fourth mirror 21a.

[0013]

Since the present invention is configured as described above, an optometry apparatus capable of efficiently and quickly performing a general visual acuity test and a special visual acuity test, and having a small space for the test. Can be realized.

[Brief description of drawings]

FIG. 1 is a schematic layout view of the apparatus of Example 1 as viewed from above.

FIG. 2 is a schematic layout view of the apparatus of Example 1 as viewed from the front.

FIG. 3 is a schematic layout view of the device of Example 1 as viewed from the subject side.

FIG. 4 is a cross-sectional view of the objective refraction test apparatus and the top plate of the optometry table.

FIG. 5 is a schematic layout diagram showing an optical system inside a visual acuity table.

FIG. 6 is a schematic layout diagram of an optometry apparatus according to a second embodiment.

FIG. 7 is a schematic layout diagram of an optometry apparatus according to a third embodiment.

[Explanation of symbols]

 2 Optometry table 5 Subjective optometry device 7 Objective refraction test device 13 Visual acuity table

Claims (4)

[Claims] 1. An optometry apparatus for ensuring a predetermined examination distance by guiding a target luminous flux of a first target presenting section for presenting a general visual acuity test target to an eye to be examined through a reflecting member, The optotype light flux of the second optotype presenting section for inspecting different visual functions is guided to the eye to be inspected by using a part of the reflecting member, and the optotypes of the first and second optotype presenting sections are used. An optometry apparatus comprising: a selection unit that selectively guides a light beam to an eye to be inspected. 2. The optometry apparatus according to claim 1, wherein the second optotype section is a trigonometry test apparatus for a deep vision test. 3. The optometry apparatus according to claim 1, wherein the selecting means is an optical path selecting means for selecting an optical path by driving the reflecting member. 4. The optometry apparatus according to claim 1, wherein the optical paths of the first and second optotype presenting sections are coaxial with each other by a half mirror, and the illuminating light sources are switched and controlled. .