JP3333548B2 - Optometry device - Google Patents

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 an optometry apparatus for improving the efficiency of optometry of a subject.

[0002]

2. Description of the Related Art For example, a subject's subjective optometry is performed.
In an optometry apparatus for inspecting the visual function, a visual acuity chart is provided in which a subjective optometry unit (vision tester) is disposed above a table for optometry and a target such as a Landolt mark is displayed at a position about 5 m in front of the table. A configuration in which display means is arranged is general.

[0003] Further, after performing an optometry with such an optometry apparatus, the subject is caused to wear a trial frame on which a spectacle lens based on the result of the visual function test is experimentally mounted. A visual test (trial check) for visually recognizing is also performed.

[0004]

However, in the visual examination after the optometry using the conventional optometry apparatus described above, the subject wearing the hanging frame equipped with the spectacle lens is once separated from the optometry apparatus, and the actual scene, etc. Must be seen for this,
A considerable time is required from the start of the optometry to the determination of the spectacle lens and the spectacle frame, and there is a problem that the efficiency of the optometry is reduced.

In the case of the above-described conventional visual examination, when determining the spectacle frame, the subject must look at the mirror separately prepared many times to confirm the state of wearing the spectacle frame. There is also a problem that the selection of the eyeglass frame according to the user's preference is complicated.

Accordingly, an object of the present invention is to provide an optometric apparatus in which the configuration is improved, an optometry and a subsequent visual examination can be continuously performed at the same place, and an eyeglass frame can be easily selected. Things.

[0007]

According to the present invention, a visual acuity chart device capable of presenting an optotype for a subjective optometry is provided in a housing, and a light beam from this visual acuity chart device is reflected toward an external reflection system. and an internal reflection system, Oite the light beam from the internal reflection based on optometric apparatus and an external reflecting system that guides in front of the eyes of the subject, an imaging unit for imaging the face of the subject, the captured facial and display means for synthesizing and displaying the eyeglass frame images subject is selected from the image and a plurality of spectacle frame arranged in the housing, wherein the inner reflecting system includes an optical beam to the prior SL imaging means from said display means It has a switching means for switching and reflecting a light beam.

[0008]

The operation of the optometry apparatus having the above configuration will be described below.

First, when performing an eye examination of a subject, an optotype presented by a visual acuity table device is guided to the subject's eyes by an internal reflection system and an external reflection system. Thereby, the optometry of the subject can be performed.

On the other hand, when selecting an eyeglass frame, first, the switching means of the internal reflection system is used to switch the image pickup means .
Switch to luminous flux . Then, the face of the subject is imaged by the imaging means in the housing, and the eyeglass frame selected by the subject and the face image are combined and displayed on the display means.
By switching to the luminous flux from the display means, the subject can visually recognize the synthesized image of the captured face and the spectacle frame with the same line of sight, and the selection of the spectacle frame becomes easy.

[0011]

An embodiment of the present invention will be described below with reference to FIG.

An optometry apparatus 1 shown in FIG. 1 includes an optometry table 2 constituting a housing having an L-shape in plan view, a column 3 erected from the table 2, and an upper end of the column 3. Attached first arm 4, second arm 5, and subjective optometry means (vision tester) supported by second arm 5
6, an optometry rotation driving unit 7 using a motor that is arranged at a connection portion between the first arm 4 and the second arm 5 and that rotates the second arm 5 and the optometry unit 6 in the arrow direction shown in FIG. And an external mirror 8 constituting an external reflection system 20 disposed near the optometry unit 6.

In the optometry apparatus 1, an examiner display means 10A is rotatably arranged on the table 2.

Inside the table 2, a visual acuity chart display means 9 as a visual acuity chart apparatus for displaying a visual target such as a Landolt mark, and a display means comprising a liquid crystal display or a CRT display for displaying various images for a visual recognition test. 10
An imaging means 11 using a TV camera for imaging the face of the subject M; and a light beam from an optotype of the visual acuity table display means 9 reflected with an optical path length of about 5 m. An internal reflection system 19 that selectively switches between a light flux from a target, a light flux from the display means 10, and a light flux from the imaging means 11 and reflects the light upward from the table 2 is provided.

The table 2 is provided with a transmission hole 13 for transmitting a light beam from the internal reflection system 19 to the external mirror 8 side.

The internal reflection system 19 includes a visual acuity table displaying means 9.
, A second mirror 15 facing the first mirror 14, a third mirror 16 facing the second mirror 15, and a fourth mirror 17 facing the third mirror 16.
And the fourth mirror 17, the display means 10, and the imaging means 1
1 is provided with a switching mirror 12 that rotates at three locations so as to face each other.

The internal reflection system 19, as shown in FIG. 3, drives the switching mirror 12 to rotate at three positions by a switching drive unit 18 using a pulse motor, and
7. Light beams from the display means 10 and the imaging means 11 are selectively sent to the external mirror 8 side.

As shown in FIG. 4, the external reflection system 20 includes an external mirror driving unit 21 using a pulse motor for rotating and driving the external mirror 8, and the external mirror driving unit 21 can be displaced vertically and vertically. A vertical movement mechanism section 22 for supporting, and a lifting drive section 23 for driving the vertical movement mechanism section 22;
When the external mirror 8 is raised, the external mirror 8 faces the vicinity of the optometry unit 6, and when the external mirror 8 is lowered, the external mirror 8 is fitted into the transmission hole 13 to cover the transmission hole 13. It has become.

As shown in FIGS. 6 to 9, the display means 10 displays images of various types of eyeglass frames, images of selected eyeglass frames, images of the subject M imaged by the imaging means 11, An image or the like obtained by combining the image of the subject M and the image of the eyeglass frame is displayed.

As shown in FIG. 2, a display means 10B using liquid crystal and an imaging means 11A with a perforated mirror 41 are slidably disposed immediately below a cover glass 13a mounted on the transmission hole 13. You may make it.

FIG. 5 shows a control system of the optometry apparatus 1. The control system 30 includes a control unit 30 for performing overall control. The control unit 30 controls the visual acuity table display unit 9 and the display unit 1.
0, examiner display means 10A, imaging means 11, optometry means rotation drive unit 7, switching drive unit 18, external mirror drive unit 21,
The lifting drive unit 23 is individually controlled.

The control means 30 includes the image pickup means 11
The first memory 32 includes a first memory 32 that stores an image of the face of the subject M captured by the first and a second memory 33 that previously stores various eyeglass frame images. An image processing means 35 for combining the stored image of the face of the subject M with an image of an arbitrary spectacle frame stored in the second memory 33 and providing the display by the display means 10 or the display means 10A for the examiner; Are connected.

In FIG. 4, reference numeral 31 denotes an operation means for inputting various operation signals.

Next, the operation of the optometry apparatus 1 having the above configuration will be described with reference to FIGS.

First, when the eye examination of the subject M is performed, the switching mirror 1 is switched by the switching driving unit 18 of the internal reflection system 19.
2 is rotated to a position facing the fourth mirror 17, and in this state, a visual target is displayed by the visual acuity table display means 9 built in the table 2.

Thus, the luminous flux from the optotype of the visual acuity chart display means 9 reaches the switching mirror 12 via the first to fourth mirrors 14 to 17, and is reflected by the switching mirror 12 and guided to the external mirror 8. I will The external mirror 13 is the switching mirror 1
The light beam from 2 is reflected toward the optometry unit 6.

As a result, the subject M can visually recognize the index of the visual acuity table display means 9 via the optometry means 6 and can execute a visual function test such as a subjective optometry.

Next, the position of the switching mirror 12 in the internal reflection system 19 is switched while the optometry means 6 is retracted from the front of the subject M, and the external mirror 8 is moved from the table 2 to the table 2.
An optical path to the image pickup means 11 is formed.

As a result, the imaging means 11 looks at the subject M
An image of the face of the subject M is captured without forcing the movement of the line . This imaging result is stored in the first memory 3 of the storage unit 34.
2 is stored.

The image processing means 35 is provided in the first memory 3
8 and the images of several types of spectacle frames stored in the second memory 33 and selected based on the display shown in FIGS. 6 and 7. An arbitrary image is synthesized and provided for display by the display means 10 as shown in FIG. At this time, the internal reflection system 19 switches the position of the switching mirror 12 and forms an optical path from the external mirror 13 to the display means 10 in the table 2.

As a result, the subject M moves his line of sight.
Without this, it is possible to visually recognize the state of the face on which the user wears the spectacle frame displayed on the display means 10, and it becomes easy to select the spectacle frame according to his / her preference.

Next, another embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG.

In the optometry apparatus 1A shown in FIG.
Those having the same functions as those of the optometry apparatus 1 are denoted by the same reference numerals, and the optometry means 6, the support 3 and the like are omitted.

An optometry apparatus 1A shown in FIG.
A dichroic mirror (visible light reflection, infrared light transmission) is used as 2A, an objective optometry unit (photoref) 51 is disposed below the switching mirror 12A, and a perforated mirror 41 is provided inside the table 2. The feature is that the imaging means 11A is arranged.

The image pickup means 11A with the perforated mirror 41
In addition to the arrangement shown in FIG. 10, the third and fourth mirrors 16,
It is also possible to provide a stage after 17.

According to the optometry apparatus 1A having such a configuration,
By moving the imaging means 11A with the perforated mirror 41 in conjunction with the alignment of the objective optometry means 51 in the X and Y directions, it is easy to position the eyeglass frame and the face when synthesizing each image. Become.

FIG. 11 shows an image around the eyes of the subject M obtained by the objective optometry means 51.

The present invention is not limited to the embodiment described above, and various modifications can be made within the scope of the invention.

For example, in addition to the imaging means 11, the alignment anterior eye observation means of the objective optometry means 51 may be used as an imaging means for selecting a spectacle frame.

[0040]

According to the present invention described in detail above, the configuration described above allows the optometry and the subsequent visual examination to be continuously performed at the same place, thereby improving the efficiency of the optometry and improving the efficiency of the examination. It is possible to provide an optometric apparatus capable of easily selecting a spectacle frame according to a user's preference.

[Brief description of the drawings]

FIG. 1 is a schematic layout diagram of an apparatus according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of another configuration example below the transmission hole of the table of the apparatus according to the embodiment of the present invention.

FIG. 3 is a perspective view of a switching optical system of the apparatus according to the embodiment of the present invention.

FIG. 4 is a perspective view of an external reflection system of the apparatus according to the embodiment of the present invention.

FIG. 5 is a block diagram showing a control system of the apparatus according to the embodiment of the present invention.

FIG. 6 is a front view showing a display mode of a display means of the embodiment device of the present invention.

FIG. 7 is a front view showing a display mode of a display means of the apparatus according to the embodiment of the present invention.

FIG. 8 is a front view showing a display mode of a display means of the apparatus according to the embodiment of the present invention.

FIG. 9 is a front view showing a display mode of a display unit of the apparatus according to the embodiment of the present invention.

FIG. 10 is a schematic layout diagram of another example of the apparatus according to the embodiment of the present invention.

11 is a front view showing a state of imaging of the face of the subject by the embodiment apparatus shown in FIG. 10;

[Description of Signs] 1 optometry apparatus 2 table 9 visual acuity table display means 10 display means 11 imaging means 19 internal reflection system 20 external reflection system

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-62-159635 (JP, A) JP-A-64-76362 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A61B 3/00-3/16

Claims (1)

(57) [Claims] A visual acuity table device capable of presenting a visual target for optometrial optometry is provided in a housing, an internal reflection system that reflects a light beam from the visual acuity chart toward an external reflection system, and an internal reflection system. Oite the light flux from the system optometric apparatus and an external reflecting system that guides in front of the eyes of the subject, an imaging unit for imaging the face of the subject, from the captured facial image and a plurality of spectacle frame to be and display means for synthesizing and displaying the eyeglass frame image examiner selects provided in the housing, wherein the internal reflective system switches the light beam from the light beam to the display means to the front <br/> SL imaging means
Optometric apparatus, characterized in that it comprises a switching means for reflecting Te.