KR102099473B1 - Optometric apparatus - Google Patents

Abstract

(Task) Reduce the influence of disturbance light outside the case body.
(Solution) A case body that accommodates a concave mirror disposed on a reference axis set in order to view a target in which the eye to be examined faces in the front direction, and a display for displaying the target, disposed outside the reference axis outside the case body. A display and a transparent panel disposed on the front surface of the case body on the reference axis, comprising a transparent panel that transmits the target luminous flux from the display and transmits the target luminous flux reflected by the concave mirror again, and exits the case body As an optometric apparatus, the normal direction of the front surface of the transparent panel is arranged at an angle inclined with respect to the reference axis, and the angle is reflected light reflected from the front surface of the transparent panel, and the reflected light of light emitted from the display deviates from the eye to be inspected at a predetermined position. It is set to face the direction.

Description

Optometry device {OPTOMETRIC APPARATUS}

The present invention relates to an optometrist device that visualizes an inspection target for inspection of visual function.

A light source such as a target plate, a halogen lamp illuminating the target plate, a beam splitter and a concave mirror formed at an angle are arranged in the case body, and the target luminous flux of the target plate illuminated by the light source is inspected through the beam splitter and the concave mirror A target display device for guiding an inspection target by light guiding with a human eye is known (see Patent Document 1). In the case of such a device, a protective cover is formed on the front surface of the case body to protect each member in the case body. In addition, a viewing window having a transparent plate is formed on the protective cover, and the target luminous flux emitted from the case body is emitted from the viewing window toward the eye to be examined.

Japanese Patent Application Publication No. Hei06-197867

However, in the above-described device, when the display to display the target is used instead of the target plate, since the light amount of the display is low, the amount of the target displayed through the beam splitter is insufficient and accurate inspection can be performed. none. In addition, conventionally, since a large sized beam splitter is formed obliquely, there is a limit to space saving of the case body and the entire apparatus. In addition, since it is the plate of the viewing window that emits the target luminous flux from inside the case body, when strong light is reflected from the transparent plate of the viewing window from outside the case body and the reflected light enters the eye of the subject, visual function inspection is performed with good precision. It cannot be done.

In view of the above-mentioned problems, the present invention provides an optometric apparatus capable of performing target timeliness for accurate inspection while saving space with a configuration using a display for displaying targets.

In order to solve the above problems, the present invention is characterized by having the following configuration.

(1) an eye refractive power measuring unit having a pair of left and right lens chamber units for switching and arranging optical elements in an inspection window,
In the optometric device for specifying the inspection target in the test subject looking into the inspection window,
A target display unit which has a concave mirror and a display for displaying the target, and reflects the target luminous flux from the display by the concave mirror, thereby displaying the target in the test;
As a support means for supporting the eye power measuring unit to move between the test position and the evacuation position in front of the eye of the eye, the support means for integrally connecting the eye power measuring unit to the target display unit,
The support means is provided with vertical movement means for moving the eye refractive power measuring unit to an evacuation position above the inspection position.

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(2) In the optometric apparatus described in (1) above,

The support means integrally connects the eye refractive power measuring unit to the upper surface of the target timing unit.

(3) In the optometric apparatus described in (1) or (2) above,

In the inspection position, the inspection window of the eye refractive power measuring unit and the inspection window of the target viewing unit are arranged to face each other.

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(4) an eye refractive power measuring unit having a pair of left and right lens chamber units for switching and arranging optical elements in an inspection window,
In the optometric device for specifying the inspection target in the test subject looking into the inspection window,
A target timing unit for marking targets in the subject,
As a support means for supporting the eye power measuring unit to move between the test position and the evacuation position in front of the eye of the eye, the support means for integrally connecting the eye power measuring unit to the target display unit,
The support means is provided with vertical movement means for moving the eye refractive power measuring unit to an evacuation position above the inspection position.

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(5) In the optometric apparatus described in (4) above,
The support means integrally connects the eye refractive power measuring unit to the upper surface of the target timing unit,

In the inspection position, the inspection window of the eye refractive power measuring unit and the inspection window of the target viewing unit are arranged to face each other.

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(6) In the optometric apparatus described in (1) above,

The display is arranged outside a predetermined viewing angle range when the eye to be examined looks into the inspection window.

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(7) In the optometric apparatus described in (1) above,
It has a case body for storing the concave mirror therein,
The concave mirror is disposed on a reference axis set to see a target in which the eye to be examined is pointed in the front direction,
The display is disposed outside the reference axis outside the case body,
A transparent panel disposed on the front surface of the case body on the reference axis, and having a transparent panel that transmits a target light flux from the display, transmits the target light beam reflected by the concave mirror again, and emits it out of the case body. and,
The normal direction of the front surface of the transparent panel is arranged at an angle inclined with respect to the reference axis,

The angle is reflected light reflected from the front surface of the transparent panel, and is set so that reflected light of the light emitted from the display is directed toward a direction deviating from the eye to be examined at a predetermined position.

(8) In the optometric apparatus described in (7) above,

The case body has a shielding member disposed around the transparent panel on the front side of the concave mirror, and the transparent panel surrounded by the shielding member constitutes a viewing window for the eye to observe the target inside the case body. do.

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ADVANTAGE OF THE INVENTION According to this invention, with the structure which used the display which displays a target, target timing can be performed for performing an accurate inspection. In addition, the influence of the disturbance light outside the case body can be reduced.

1 shows an external view of an optometric apparatus according to the present invention.
2 shows a front view of the optometric apparatus.
3 shows a cross-sectional view of the optometric apparatus.
4 shows a front view of the target display unit.
It is a figure explaining the arrangement position of a display.
6 shows a schematic configuration diagram of the case body.
It is a figure explaining the evacuation means of a measurement unit.
8 is a control block diagram of an optometric apparatus.
It is a figure explaining the switching of the optical path for the original inspection and the optical path for the near inspection.
It is a figure which shows schematic block diagram in a target display part and an optical path switching unit part.
11 is a view showing a variation of the optometric apparatus.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment concerning this invention is described based on drawing. 1-11 is a figure explaining the structure of the optometric apparatus according to the present embodiment.

<Overview>

The outline of the optometric apparatus according to the embodiment of the present invention will be described. The optometric apparatus 1 according to the present embodiment includes a target display unit 3 and a subjective ocular power measurement unit 8 (hereinafter abbreviated as measurement unit 8). The optometric apparatus 1 uses the target timing unit 3 to specify the target in the test subject for the original examination optical path (remote examination optical path), and examines the original objective function (remote visual function). The measurement unit 8 has a pair of left and right lens chamber units 80 for switching and arranging optical elements (for example, corrective lenses) in the inspection window 81. For example, the optometric apparatus 1 sets an inspection target in a test subject looking into the test window 81 of the measurement unit 8, and checks the original function of the test subject.

Moreover, the optometric apparatus 1 has an optometric table (ophthalmologic table unit) 2 and a holding means (holding unit) 10. The holding unit 10 holds the measuring unit 8 such that the inspection window 81 is positioned at the same height as the reference axis L1, in addition to holding the target timing unit 3. For example, the holding unit 10 holds the target timing unit 3 on the optometric table unit 2.

In addition, the target timing unit 3 is not limited to the structure held by the optometric table unit 2 by the holding unit 10. For example, the structure which the holding | maintenance unit 10 has a wall-mounted type structure, and the target display time unit 3 is provided in the wall is mentioned.

The target viewing unit 3 has a concave mirror 50 and a display 45 for displaying the target. The target-sighting unit 3 reflects the target luminous flux emitted from the display 45 by the concave mirror 50, and optically corrects the target at a predetermined inspection distance. For example, the target display unit 3 arranges the normal direction to the screen of the display 45 inclined with respect to the optical axis O1 of the concave mirror 50 so that the target light flux is concave mirror 50 It shifts with respect to the optical axis O1 of the beam, and is incident.

For example, a liquid crystal display (LCD), an organic EL (Electro Luminescence), or the like is used as the display 45.

For example, the concave mirror 50 is disposed on the reference axis (center axis of the left and right eyes) L1 in the frontal direction when the eye to be examined looks at the front. For example, the concave mirror 50 is accommodated in the case body 5.

For example, the case body 5 has a viewing window (e.g., a transparent panel 52) disposed on the front surface of the concave mirror 50 on the reference axis L1, and the front direction of the measuring unit 8 Is placed in. The transparent panel 52 transmits the target luminous flux from the display 45 and transmits the target luminous flux reflected by the concave mirror 50 again, and ejects it out of the case body 5.

With this configuration, the target display unit 3 is configured to display the target without passing through the beam splitter in which the amount of light loss of the target light flux is large, and thus ensures the luminance required for visual inspection without using a display emitting a large amount of light. One inspection can be performed accurately. In addition, since the case body 5 does not have a beam splitter, the case body 5 can be thinned, and an optometric apparatus with more space saving can be realized.

Hereinafter, detailed description of each configuration. In the following description, the display 45, the transparent panel 52, the optical path switching unit 60, and the cognitive eye power measurement unit will be described in this order. Moreover, the following structures can be combined suitably, and may be implemented as independent structures.

<Display>

The display 45 is disposed outside the reference axis L1 outside the case body. In addition, the display 45 is arranged outside the predetermined viewing angle range when the eye to be examined looks into the inspection window 81 of the measurement unit 8.

For example, the display 45 is disposed outside the case body 5, and furthermore, the convex mirror 50 is provided from the display body 45 through the transparent panel 52 from the outside of the case body 5 through the target luminous flux. It is placed in the facing position. More specifically, for example, the display 45 is disposed around the measurement unit 8, and outputs the target luminous flux from the eye subject side toward the concave mirror 50. Further, for example, the display 45 is disposed around the forehead 82 of the measurement unit 8. More specifically, for example, the display 45 is disposed at a position above the forehead 82 of the measurement unit 8.

By arranging such display 45, it is possible to secure a wide field of view to the subject. Then, when the subject observes the original target inside the case body 5 through the transparent panel 52, the display 45 which is an extra structure on the subject side from the protection panel 51 is eliminated. This eliminates the subject's gaze on the display 45, and can reduce the intervention of adjustment of the subject's eye due to seeing structures other than the target during the original inspection. Then, visual function inspection can be performed with good precision.

In addition, the display 45 need not be arranged outside the predetermined viewing angle range when looking into the inspection window 81 of the measurement unit 8. For example, the display 45 is disposed outside the case body 5, and the target light flux is output from the display body 45 from the outside of the case body 5 via the transparent panel 52 to the concave mirror 50. As a position to face, it may just be a configuration arranged near the forehead of the subject. Thus, by placing the display 45 near the forehead of the subject, when the target light flux is emitted toward the concave mirror 50, the angle of incidence to the concave mirror 50 and the reflection from the concave mirror 50 will be reflected. The reflection angle at the time is small. For this reason, the distortion of the target can be reduced.

<Transparent panel>

The transparent panel 52 formed on the case body 5 is arranged at an angle in which the normal direction of the front surface of the transparent panel 52 is inclined with respect to the reference axis L1. Moreover, the inclination angle of the transparent panel 52 is set so that the reflected light emitted from the display 45 and reflected from the front surface of the transparent panel 52 is directed away from the eye to be examined at a predetermined position.

Thereby, the problem which interferes with observation of the subject's target can be alleviated by the strong light of the display 45 reflected from the transparent panel 52 entering the eye to be examined. In addition, the disturbance light of the subject's rear background and the disturbance light above the optometric apparatus 1 are reflected by the transparent panel 52 and incident on the subject, thereby reducing the problem of obstruction of the subject's observation of the subject.

For example, in the case body 5, a shield member (shield 53) is disposed around the transparent panel 52 on the front side of the concave mirror 50, and is transparent surrounded by the shield 53 The panel 52 may be configured such that the eye to be examined forms a viewing window for observing the target inside the case body 5. By forming the shielding portion 53, the internal structure of the case body 5 becomes difficult to see. Of course, the viewing window may be composed of only the transparent panel 52, and a configuration in which the shield 53 is not formed may be used.

Moreover, you may make it the structure which forms the upper shielding member (shielding cover 6) which covers the upper part of the optical path between the transparent panel 52 and the display 45, for example. Moreover, you may make it the structure provided with the side shielding member (shielding cover 6) which covers the side of the optical path between the transparent panel 52 and the display 45, for example. By forming the structure of such a shielding member, it has an effect of suppressing incident light due to fluorescent lamps or the like from entering the optical member in the device.

Moreover, in this embodiment, although the shielding cover 6 is a structure which also serves as an upper shielding member and a side shielding member, you may comprise respectively a separate member. Moreover, you may make it the structure which forms only one of the upper shielding member and the side shielding member in this embodiment.

<Means for switching optical paths>

In addition, the optometric apparatus 1 switches a near-inspection optical path (a near-inspection optical path) for guiding the target luminous flux from the display 45 with the eye under examination without passing through the reflection of the original inspection optical path and the concave mirror 50. And an angle changing means (first angle changing means) for changing the inclination angle of the screen of the display 45 in the original examination and the near examination.

The angle changing means is positioned substantially perpendicular to the reference axis L1 when the eye to be examined looks at the screen of the display 45 when the optical path switching means switches between the original inspection optical path and the near inspection optical path. The inclination angle of the screen of the display 45 is changed so that it can be observed as a screen. In addition, as a structure in which the screen of the display 45 is inclined, the screen of the display 45 is not limited to vertical. The inclination angle of the screen of the display 45 does not have to be completely perpendicular to the reference axis L1, and may be such that the distortion-reduced target is inclined to the extent that it can be projected in the subject. That is, the inclination angle of the screen of the display 45 may be a configuration inclined substantially vertically.

For example, the light path switching means has a reflective member (reflective mirror) 62 that can be inserted and removed between the eye to be examined and the concave mirror 50, and the reflective member (between the eye to be examined and the concave mirror 50). The structure of the optical path switching unit 60 which switches the original inspection optical path and near inspection optical path by inserting and removing 62) is mentioned. For example, the reflective member 62 includes a planar mirror, a convex mirror, and a concave mirror. In this case, for example, when the angle changing means is switched to the near-inspection optical path, the normal direction to the screen of the display 45 and the direction of the axis where the reference axis L1 is reflected by the reflective member 62 The angle of inclination of the screen of the display 45 is changed so that it approximately matches. That is, the angle changing means, when switching to the optical path for near inspection, the target light flux emitted from the normal direction of the screen of the display is reflected by the reflective member in the direction of the reference axis toward the eye to be examined. Change the angle of inclination.

In addition, as a configuration for changing the inclination angle of the screen of the display 45, the normal direction and the reference axis L1 with respect to the screen of the display 45 are reflected members 62 when switching to the optical path for near inspection. It is not limited to a configuration in which the direction of the axis reflected by) is changed to coincide. In order to change the inclination angle of the screen of the display 45, it is not necessary that the direction of the normal to the screen of the display 45 and the direction of the axis where the reference axis L1 is reflected by the reflective member 62 are completely identical. It is sufficient as long as the angle of inclination is changed so that the distortion-reduced target can be projected into the subject. That is, the configuration for changing the inclination angle of the screen of the display 45 is changed such that the direction of the normal to the screen of the display 45 and the direction of the axis where the reference axis L1 is reflected by the reflective member 62 approximately coincide. It should just be a structure to do.

Further, when switching to the optical inspection inspection path, the inclination of the screen of the display such that the direction of the normal to the screen of the display 45 and the direction of the axis reflected by the concave mirror 50 of the reference axis L1 approximately coincide. Change the angle. That is, when switching the optical path for the original inspection, the inclination angle of the screen of the display is changed so that the target luminous flux emitted from the normal direction of the screen of the display is reflected by the concave mirror in the direction of the reference axis toward the eye to be examined.

In addition, as a configuration for changing the inclination angle of the screen of the display 45, the normal direction and the reference axis L1 to the screen of the display 45 are concave mirrors (when switching to the optical path for inspection). It is not limited only to a configuration in which the direction of the axis reflected by 50 is changed to coincide. In order to change the inclination angle of the screen of the display 45, it is not necessary that the direction of the normal to the screen of the display 45 and the direction of the axis where the reference axis L1 is reflected by the concave mirror 50 completely coincide. It is sufficient as long as the angle of inclination is changed so that the distortion-reduced target can be projected into the subject. That is, the configuration for changing the inclination angle of the screen of the display 45 is such that the normal direction to the screen of the display 45 and the direction of the axis where the reference axis L1 is reflected by the concave mirror 50 approximately coincide. Any configuration to be changed may be used.

As described above, the optical path switching means inserts a reflective member that reflects the target luminous flux from the display and guides it to the eye, or inserts the display into the optical path between the eye and the concave mirror, or the display as the optical path between the eye and the concave mirror. The optical path is switched by the structure provided with the moving means for moving. Thereby, it becomes possible to easily switch between the optical path for inspection for original use and the optical path for inspection for near use. In addition, since the inclination angle of the display 45 changes with the switching of the optical path, even when the optical path is switched, a target with reduced distortion can be projected in the subject. Thereby, with the structure using the display which displays a target, the target timing can be performed for performing an accurate inspection.

Moreover, as a variation example, the structure in which the optical path switching unit 60 is provided with the inclination angle change means for reflection members (2nd angle change means) for changing the inclination angle of a reflection member is mentioned, for example. In this case, the optical path switching unit 60 moves the reflective member 62 on the reference axis L1 while the reflective member 62 is inserted between the eye to be examined and the concave mirror 50 and is also used for the reflective member. The inclination angle of the reflective member 62 is changed by the inclination angle changing means to change the near-inspection distance of the near-inspection optical path. Further, the angle changing means changes the inclination angle of the screen of the display 45 so that the normal direction to the screen of the display 45 and the direction of the axis where the reference axis L1 is reflected by the reflective member 62 approximately coincide. . In this way, not only a distance test and a near-field test, but also a medium-range test is possible.

Further, for example, as a variation of the optometric apparatus 1, an optical path changing mirror (reflecting mirror) 123 disposed near the forehead of the eye to be examined is provided, the optical path for inspection for the original purpose, and the display 120 is a concave mirror A configuration that is arranged on the 50 side and reflects the target luminous flux from the display 120 by the light path changing mirror 123 is directed to the concave mirror 50. In this case, the optical path switching means includes a configuration in which the optical path for original inspection and the optical path for near inspection are switched by inserting and removing the display 120 into the optical path between the eye to be examined and the concave mirror 50. Further, in this case, the angle changing means changes the inclination angle of the display 120 so that the screen of the display 120 is substantially perpendicular to the reference axis L1.

<Awakening Power Measurement Unit>

The measurement unit 8 is moved in the test position and the evacuation position in front of the eye of the eye under test, depending on whether or not it is used for visual function inspection.

For example, the holding unit 10 is provided with support means (eg, support arms 20). The supporting means supports the measuring unit 8 so as to be movable between the test position and the evacuation position in front of the eye of the eye to be examined.

For example, the holding unit 10 is composed of a first holding member (hold) 10a, and a second holding member (upper holding) 10b extending from the holding 10a. The holding body 10a holds the case body 5 at a position spaced apart from the measuring unit 8 placed in the inspection position. The upper strut 10b extends from the strut 10a, and is configured to extend from the upper side of the case body 5 to the subject to hold the display 45. Then, the supporting means is connected to the upper post 10b.

For example, the support means for supporting the measurement unit 8 so as to be movable between the inspection position and the evacuation position may include using a support arm 20, a support member (eg, a strut).

For example, when the support arm 20 is used as a support means, the support arm 20 is connected to the upper post 10b, and a configuration capable of pivoting around the connection position O is exemplified. Then, the support arm 20 supports the measurement unit 8 to be movable between the inspection position and the evacuation position by turning of the support arm 20. This leads to the compactness of the device, and further space saving can be achieved.

Further, in the present embodiment, for example, if the connection position O is connected at a position moved in the vertical direction with respect to the ground from the central axis (the central axis of the left and right eyes) C of the optometric apparatus 1 Even better. In this way, by connecting the connecting position O at the position moved from the central axis C of the optometric apparatus 1, it becomes possible to move the measuring unit 8 with a smaller movable range. Thereby, since the movable range is small when moving the measurement unit 8, the possibility of contact with the inspector is reduced.

Further, when a support member is used, the support member is mounted on the upper strut 10b as a support member with vertical movement means (for example, a known telescopic pipe mechanism). With the configuration that moves the measurement unit 8 to the evacuation position above the inspection position, the measurement unit 8 can be moved between the inspection position and the evacuation position. Thereby, since the measurement unit 8 does not cross the examiner's face when the measurement unit 8 is moved, the possibility of contact with the examiner can be reduced.

In addition, in this embodiment, although it is set as the structure in which the support means connected with the measurement unit 8 is formed in the target display unit 3 via the holding unit 10, it is not limited to this. For example, it is good also as a structure in which the supporting means is connected to the target timing unit 3 without interposing the holding unit 10.

<Example>

EMBODIMENT OF THE INVENTION Hereinafter, the form of this invention is demonstrated based on drawing. 1 shows an external view of an optometric apparatus according to the present invention. FIG. 2 shows a front view of the optometric apparatus 1 in which the optometric apparatus 1 was observed in the X direction on FIG. 1. Moreover, the front view of the optometric apparatus of FIG. 2 shows the optometric apparatus 1 in the case where the cognitive eye power measurement unit 8 is disposed in a retracted position (details will be described later). 3 shows a cross-sectional view of the device when the optometric apparatus 1 is cut into the A-A plane in FIG. 2. 3, the measurement unit 8 is omitted.

The optometric apparatus 1 includes an optometric table unit 2, a targeted timing unit 3, and a subjective ocular power measurement unit 8 (hereinafter abbreviated as a measurement unit 8). The ophthalmic table unit 2 includes a vertical drive unit 2b for vertically moving the table 2a and the table 2a, and a height adjustment switch 2c for inputting an indication signal of vertical movement of the table 2a. . The up and down drive unit 2b is provided with a drive source such as a motor, and the drive source is driven by an instruction signal input from the switch 2c.

The target timing unit 3 includes a case body 5 and an outer cover (shielding cover) 6 containing a target display unit 4 and a concave mirror 50 having a display 45 for displaying the target, as described later. And an optical path switching unit 60. The target timing unit 3 is held by the holding unit 10 having a strut formed erected on the table 2a. As an example of the preferable holding unit 10, the case body 5 is attached to the 1st holding member (hold) 10a formed by standing on the table 2a end, and it is hold | maintained. The holding unit 10 extends from the strut 10a, and a second holding member extending from the upper side of the case body 5 to the subject side (front side of the case body 5) to hold the display 45 ( The upper strut) 10b is provided, and the target display section 4 is attached to the front portion of the upper strut 10b.

Further, the measuring unit 8 is held in the holding unit 10 so as to be able to move between the measuring position and the evacuation position. As a preferred example, the measurement unit 8 is supported on the upper post 10b so as to be able to move between the measurement position and the evacuation position through a support member (eg, support arm) 20. The target timing unit 3, the optometric table unit 2, and the measurement unit 8 constitute an integrated optometric apparatus 1. However, the optometric apparatus 1 may be configured without the measurement unit 8.

The measurement unit 8 is a pair of left and right lens chamber units 80 in which various optical elements (spherical lenses, circumferential lenses, auxiliary lenses, etc.) that give refractive power to the subject are switched and arranged in the left and right inspection windows 81. It is provided. In addition, the measurement unit 8 is provided with a forehead 82 for making the eye to be examined a predetermined positional relationship with respect to the inspection window 81. As shown in Fig. 1, when the measurement unit 8 is positioned at the measurement position, the inspection window 81 is set to be positioned at a predetermined reference axis L1 height at which the target is marked by the concave mirror 50. It is done.

The target viewing unit 3 reflects the target luminous flux from the display 45 disposed outside the case body 5 by the concave mirror 50 to face the eye to be examined, and optically determines the desired distance for inspection (eg For example, the target is marked at the inspection distance of 5 m). In addition, the target viewing unit 3 is inserted between the concave mirror 50 and the eye to be examined, so that the target light flux from the display 45 is reflected by the reflecting member 62 to face the eye to be examined. Thus, it is switched to the near-target display unit that sets the target at a predetermined near-inspection distance (for example, 40 cm). Since the target display unit 3 is configured to display the target without passing through a beam splitter in which the amount of light loss of the target luminous flux is large, it is possible to accurately perform an inspection that ensures the luminance required for visual acuity inspection or the like without using a display emitting a large amount of light. Can be implemented. In addition, since the case body 5 does not have a beam splitter, the case body 5 is thinned, and an optometric apparatus with more space saving can be realized.

<Target display part>

In Fig. 3, the target display unit 4 includes a support unit 41 and a display 45 for displaying the target. The display 45 is supported by a support 41. The support portion 41 is held on the base 65 via a shaft (rotation shaft) 42 to be described later. The base 65 is supported by the holding unit 10. In this way, the target display unit 4 is supported by the holding unit 10. On the display 45, an inspection target such as a Landolt ring target is displayed. For example, a liquid crystal display (LCD), an organic EL (Electro Luminescence), or the like is used as the display 45. In the present embodiment, the following description is given taking the case where an LCD is used as the display 45 as an example.

4 shows a front view of the target display unit 4. The display 45 is supported by the support portion 41, and a substrate or the like of the display 45 (not shown) is disposed on the support portion 41. A mask plate (cover) 49 for covering a member such as a substrate is formed on the surface of the support portion 41. The mask plate 49 is disposed around the screen of the display 45, and has a function of preventing extra objects around the display 45 from being seen in the test subject. The mask plate 49 is formed of, for example, a black acrylic resin or an iron plate coated with a black coating. This prevents the substrate 45 and the like around the display 45 from being visible, in addition to the screen of the target indicated in the test subject. Moreover, the background of the projected target can be made black by using the black mask plate 49, and the target becomes easy to confirm. Of course, the mask plate 49 may not be black.

5 is a diagram explaining an arrangement position of the display 45. The display 45 is arranged such that when the subject looks into the inspection window 81 of the measurement unit 8 and observes the target, it is outside the range of the predetermined viewing angle α1 from the inspection window 81. That is, the viewing angle α1 is the viewing angle centered on the reference axis (the central axis of the left and right eyes) L1 when the eye to be examined faces through the inspection window 81 of the measuring unit 8, and the measurement unit ( In 8), it is determined by design depending on the size of the opening of the inspection window 81 formed on the side farther than the eye to be examined. The viewing angle α1 of the measurement unit 8 is set to 40 degrees around the reference axis L1, for example. Moreover, the vertical position of the reference axis L1 is a position substantially equal to the measurement optical axis of the inspection window 81 of the measurement unit 8 (the optical axis of the spherical lens disposed in the inspection window 81). Further, the left and right positions of the reference axis L1 are approximately the same as the left and right center positions of the left and right inspection windows 81. The concave mirror 50 is disposed on the reference axis L1 in the front direction of the eye to be placed at a predetermined position.

The concave mirror 50 is provided with the optical axis O1 (concave mirror 50) of the concave mirror 50 to reflect the target luminous flux from the display 45 disposed outside the reference axis L1 toward the eye to be examined. The normal direction of the curved surface) is inclined with respect to the reference axis L1. And the display 45 is arrange | positioned on the axis L2 which is a reflection axis of the reference axis L1 in the concave mirror 50. The inclination angle of the screen of the display 45 with respect to the reference axis L1 is set so that an axis (normal direction) perpendicular to the screen of the display 45 becomes the direction of the axis L2. Thereby, when the screen of the display 45 in which the eye to be examined is reflected by the concave mirror 50 is viewed, the screen can be viewed as a screen positioned perpendicular to the reference axis L1.

In this embodiment, the vertical position of the display 45 is disposed outside the range of the viewing angle α1 and as close as possible to the reference axis L1. For example, the display 45 is disposed near the forehead 82 (i.e., the subject's forehead) of the measurement unit 8 at a position above the inspection window 81, and the concave mirror 50 from the eye subject side ) Toward the target beam. Moreover, the arrangement position of the display 45 in the left-right direction is the central position when the subject faces the concave mirror 50.

Moreover, in this embodiment, the inclination angle of the optical axis O1 of the concave mirror 50 with respect to the reference axis L1 is 5 degrees. That is, the target luminous flux emitted from the display 45 is reflected by the concave mirror 50, and the reflection angle when guided by the eye to be examined is 5 °. In addition, the inclination angle of the axis L2 of the display 45 with respect to the optical axis O1 is 5 °. That is, the angle of incidence when the target luminous flux emitted from the display 45 enters the concave mirror 50 is 5 °.

The inclination angle of the display 45 and the inclination angle of the concave mirror 50 are set so as to have the above structure. By setting it as such a structure, generation | occurrence | production of the distortion of the target indicated in the to-be-tested can be suppressed. In addition, in the present embodiment, by disposing the display 45 near the forehead of the subject as described above, the angle of incidence and concave to the concave mirror 50 when the target luminous flux exits toward the concave mirror 50 The reflection angle when reflected from the surface mirror 50 is small. For this reason, the distortion of the target can be reduced. In this way, with the configuration using a display for displaying targets, target timing can be performed for accurate inspection while saving space.

In addition, in this Example, although it was set as the structure of 5 degrees of incidence angles and 5 degrees of reflection angles, it is not limited to this. It is only necessary to configure the angle of incidence and the angle of incidence where the distortion of the target is small.

In addition, in this embodiment, a microscopic shielding wall 69 is formed under the display 45. Thereby, it is possible to efficiently remove the light flux incident into the eye to be examined directly from the display 45 when the apparatus is used in, for example, a darkroom. In addition, in this embodiment, the shielding wall 69 is configured as a part of the shielding cover 6. The shielding cover 6 protrudes to the lower portion of the display 45, and serves as a shielding wall 69.

By arranging such a display 45, it is possible to secure a wide field of view to the subject. Then, when the subject observes the original target inside the case body 5 through the target viewing window (transparent panel 52), the display 45, which is an extra structure on the subject side, is viewed from the protection panel 51. This disappears. This eliminates the subject's gaze on the display 45, and can reduce the intervention of adjustment of the subject's eye due to seeing structures other than the target during the original inspection. Then, visual function inspection can be performed with good precision.

In addition, the viewing angle of the inspection window 81 of this embodiment is about 40 °, but is not limited to this. When the measurement units 8 of different types are used, the size and shape of the inspection window 81 vary, and the viewing angle from the inspection window 81 of the measurement unit 8 of each type is different. In addition, the viewing angle also changes depending on the distance from the eye to the inspection window 81 of the measurement unit 8. In this regard, it is better to fine-adjust the placement position of the display 45 according to the viewing angle. In addition, in this embodiment, the distance from the eye to the inspection window 81 of the measurement unit 8 is made constant by placing the forehead of the subject at the forehead 82.

<Light path switching unit>

The optical path switching unit 60 includes a support portion 61, a reflective mirror (eg, a plane mirror) 62, and a handle 63. The optical path switching unit 60 switches the optical path for original inspection and the optical path for near inspection by a configuration in which the reflection mirror 62 is inserted and detached on the reference axis L1 when the eye to be inspected views the front side (details will be described later) ).

<Case body>

6 shows a schematic configuration diagram of the case body 5. Fig. 6 (a) is a diagram explaining the optical arrangement of each member. 6 (b) is a diagram for explaining surface reflection by the protective panel 51. The case body 5 is a case for storing the concave mirror 50. The case body 5 has a protection panel 51 disposed on the front side (reflection side) of the concave mirror 50. The protective panel 51 includes a transparent panel 52 made of a transparent member such as an acrylic resin or a glass plate, and a shield 53 disposed around the transparent panel 52. The transparent panel 52 passes the target luminous flux from the target display unit 4 (display 45) disposed outside the case body 5, and passes the target luminous flux reflected by the concave mirror 50. , Is discharged to the outside of the case body 5 (taken out).

Moreover, the case body 5 is not limited to the case to be accommodated. The case body 5 may have at least a structure in which the reflective surface of the concave mirror 50 is protected from dust or external contact, and may not be a case-like configuration. For example, a case body that does not cover a part of the concave mirror 50 may be used. In this case, a configuration in which the back surface of the concave mirror 50 is not covered can be mentioned. The concave mirror 50 is held by the case body at least at a position around the concave mirror 50, and a protective panel is disposed on the front side of the concave mirror 50. Moreover, the structure in which the case body 5 is comprised by the holding unit 10 may be sufficient.

The transparent panel 52 serves as a target viewing window when the subject observes the target inside the case body 5. The subject views the target in the center through the transparent panel 52 of the target window. The shield 53 has, for example, a black coating or a black filter attached to its back side (inside the case body). In addition, the interior of the case body 5 is painted black, so that the internal structure is not easily seen. The case body 5 having the protective panel 51 protects the dust from adhering or causing damage to the concave mirror 50 composed of high precision. The concave mirror 50 is disposed on the reference axis L1 when the eye to be examined looks at the front. The concave mirror 50 is arranged such that the optical axis O1 of the concave mirror is inclined with respect to the reference axis L1, and its focal length is designed so that the optical distance between the display 45 and the eye to be examined is an inspection distance of 5 m. have.

Here, the transparent panel 52 is such that the inclination angle θ of the normal (normal direction) L3 of the surface of the transparent panel 52 with respect to the reference axis L1 is a predetermined angle (for example, 10 ° or more). It is inclined. The angle θ is set at an angle toward the direction in which the reflected light is out of the eye under test when the light from the target display unit 4 (display 45) is reflected from the surface of the transparent panel 52. In particular, since the display 45 emits strong light, when the light of the display 45 reflected by the transparent panel 52 enters the eye, the reflected light is observed through the concave mirror 50. It interferes. In addition, when the disturbance light in the background behind the subject and the disturbance light above the device 1 are reflected by the transparent panel 52 and enters into the eye to be examined, the subject's observation of the subject becomes obstructed. In this apparatus, these problems can be alleviated by setting the angle (θ) as described above, and the configuration using a display that displays the target, aims to save space, while targeting the target for accurate inspection. Can be implemented.

<Shield cover>

In addition, in order to suppress the incidence of disturbance light into the optical member (display 45, reflection mirror 62, protection panel 51, and concave mirror 50) possessed by target display unit 3, shielding cover 6 ) Is disposed in the upper position and the lateral position of the upper post 10b of the holding unit 10. The shielding cover 6 has an effect of suppressing incident light from a fluorescent lamp or the like into the optical member in the device by covering the upper side of the device and the upper side than the reference axis L1. In addition, in this embodiment, although the shielding cover 6 was made into the structure arrange | positioned in an upper position and a lateral position, it is not limited to this. The shielding cover 6 may preferably be arranged in an upper position. Moreover, the structure without the shielding cover 6 in a lateral position may be sufficient.

<Moving mechanism of the cognitive eye power measurement unit>

The measurement unit 8 is supported by the holding unit 10 at a position above the central axis C of the surface formed by the inspection window 81 of the measurement unit 8 by the support arm 20. Of course, the position supported by the support arm 20 is not limited to the upper position on the central axis C of the surface formed by the inspection window 81. It is sufficient as long as it is supported by the support arm at any position of the measurement unit 8.

Further, the support arm 20 is connected to the holding unit 10 so that it can rotate freely (so that it can pivot). Thereby, the measurement unit 8 supported by the support arm 20 is configured so that it can rotate freely with respect to the holding unit 10. The inspector places the measurement unit 8 at the inspection position in front of the eye of the eye under test. The subject is placed on the forehead 82 of the measurement unit 8, thereby placing the eye under a certain position. Then, the target is observed through the inspection window 81 of the measurement unit 8 in this state, and the visual function is inspected.

In addition, the measurement unit 8 is configured so that it can rotate freely with respect to the holding unit 10 by the support arm 20. 7 is a diagram explaining evacuation means of the measurement unit 8. Fig. 7 (a) shows a front view of the device when the measurement unit 8 is placed at the inspection position (measurement position), and a plan view when the device is viewed from the F direction. Fig. 7 (b) shows the front view of the device when the measurement unit 8 is placed in the retracted position, and the top view when the device is viewed from the F direction.

When the measurement unit 8 is moved between the inspection position and the evacuation position, the measurement unit 8 is pivoted on the arc, centering on the connecting position O of the support arm 20 and the holding unit 10. Order. That is, the measurement unit 8 is rotated around the connecting position O of the support arm to measure the measurement unit 8 to the reference axis L1 (concave mirror 50), the measurement unit 8 It is moved from the inspection position to the evacuation position.

Here, for example, when the connecting position O is positioned on the central axis C, the measuring unit is not to interfere with the shielding cover 6 or the holding unit 10 when the measuring unit 8 is moved. (8) It is necessary to increase the distance between the shielding cover (6) or the holding unit (10). In other words, in order to avoid interference, it is necessary to increase the movable range when moving the arc, so the length W of the support arm 20 must be made longer.

In the present embodiment, the connection position O in the plan view of FIG. 7 is connected at a position moved in the vertical direction with respect to the ground from the central axis C of the device. In this way, by connecting the connecting position O at a position moved from the central axis C of the apparatus, it becomes possible to move the measuring unit 8 with a smaller movable range. That is, even if the length W of the support arm 20 is shortened and the movable range of the measurement unit 8 is made small, interference with the shielding cover 6 and the holding unit 10 does not occur.

For example, in a plan view, when the connection position O is positioned upward (leftward with respect to the ground of the front view) from the central axis C, when the measurement unit 8 is moved in the leftward direction of the eye under test The movable range of the turning movement becomes small. In addition, in the case of moving the measurement unit 8 to the right direction of the eye under test when the connection position O is positioned downward from the central axis C in the plan view (right direction with respect to the ground of the front view) The movable range of the turning movement becomes small.

As described above, the measuring unit 8 is integrally connected to the target display unit 3, and the connecting position O is moved from the central axis C of the apparatus, thereby making the measuring unit 8 with a smaller movable range. ). This leads to the compactness of the device, and further space saving can be achieved. In addition, since the movable range is small when the measurement unit 8 is moved, the possibility of contact with the inspector decreases.

Moreover, in this embodiment, the support arm 20 connected to the upper post 10b is configured to be able to rotate (turn) around the connection position, and the measurement unit 8 is moved by the pivotal movement of the support arm 20. It is configured to move from the inspection position to the evacuation position, but is not limited to this. It is good also as a structure which mounts the up-and-down movement means to the upper post 10b of the holding unit 10, and moves the measurement unit 8 to the evacuation position above the inspection position. For example, the measurement unit 8 is connected to the holding unit 10 so that it can freely expand and contract by a known telescopic pipe mechanism. Then, the measurement unit 8 is evacuated by moving the measurement unit 8 in the vertical direction. Thereby, when the measurement unit 8 is moved, the measurement unit 8 does not cross the examiner's face, so the possibility of contact with the examiner can be reduced. Moreover, when evacuating the measurement unit 8 by up-and-down movement, it is better if the measurement unit 8 does not enter the visual field of the eye to be examined.

Moreover, you may form the structure which the measurement unit 8 can move up and down with respect to the support arm 20, and the measurement unit 8 may be moved up and down. Of course, the evacuation means may be configured by combining up and down movement and turning movement.

<Control part>

8 is a control block diagram of an optometric apparatus. The control unit 70 is connected to a measurement unit 8, a display 45, a controller 90, a memory 72, and the like. In the memory 72, a large number of data of an inspection target such as a Randol ring target are stored. For example, target data having a visual acuity value of 0.1 to 2.0 is stored. The control unit 70 calls corresponding target data from the memory 72 according to the input signal from the controller 90 to control the display of the display 45 and display the target on the screen of the display. Further, in the present embodiment, the signal from the controller 90 is input to the control unit 70 through a cable (not shown), but the signal may be input by wireless communication such as infrared rays.

<Light path switching>

In this apparatus, the optical path switching unit 60 for switching the optical path for original inspection and the optical path for near inspection is formed at the target timing of the target visibility unit 3. Hereinafter, the optical path switching will be described. It is a figure explaining the switching of the optical path for inspection for original use and the optical path for inspection for near use. Fig. 9 (a) shows an optical path for original inspection. Fig. 9B shows an optical path for near field inspection. In addition, the measurement unit 8 is omitted in FIG. 9.

When the visual function inspection is performed by the optical path for original inspection, the target light flux is emitted from the display 45 toward the concave mirror 50, and the target light flux reflected by the concave mirror 50 is fixed to the test subject. The subject observes the scheduled target and performs an original visual function test.

In the case where the visual function inspection is performed with the optical path for near inspection, the reflection mirror 62 is disposed on the reference axis L1 between the eye to be examined and the concave mirror 50. Further, the inclination angle of the screen of the display 45 is changed so that the normal direction to the screen of the display 45 and the direction of the axis L4 where the reference axis L1 is reflected by the reflection mirror 62 approximately coincide. do.

Then, the target luminous flux emitted from the display 45 is guided to the eye under the reference axis L1 without passing through the concave mirror 50. When the target luminous flux is guided to the eye to be examined without passing through the concave mirror 50, the inspection distance becomes short (for example, 40 cm).

In addition, when switching to the optical inspection-use optical path, the display is displayed so that the normal direction to the screen of the display 45 and the direction of the axis L2 where the reference axis L1 is reflected by the concave mirror 50 approximately coincide ( 45) Change the inclination angle of the screen.

Hereinafter, a device configuration for switching the optical path will be described. 10 is a diagram showing a schematic configuration diagram of the target display unit 4 and the optical path switching unit 60. 10 (a) shows the target display portion 4 and the optical path switching unit 60 at the time of the original inspection optical path. Fig. 10 (b) shows the target display portion 4 and the optical path switching unit 60 at the time of the near-inspection optical path.

The target display section 4 is a configuration for changing the inclination angle of the display 45, and the shaft 42, the rotation limiting section (projection section 44a, stopper 44b) 44, display 45, projection section ( 46), and a spring (47). Each member of the target display section 4 is held on the base 65. The display 45 is connected to the shaft 42 through the support 41. The shaft 42 is held on the base 65 so that it can rotate around its axis. Thereby, the inclination angle of the display 45 with respect to the holding unit 10 can be changed.

Further, a spring 47 is connected to the shaft 42, and the shaft 42 receives an upward force by the spring force of the spring 47. This spring force acts as a force (the force that inclines the display 45) to rotate the shaft 42 in the B1 direction at all times (see Fig. 9). At this time, the amount of rotation is limited by the rotation limiting section 44. That is, the inclination angle of the display 45 is limited to a predetermined angle by the rotation limiting section 44. The rotation limiting section 44 is composed of a projection section 44a and a stopper 44b. The projection 44a is formed in the shaft 42. The stopper 44b is held on the base 65. When the shaft 42 rotates a predetermined amount, the projection 44a formed in the shaft 42 is fitted into the stopper 44b to stop rotation of the shaft 42. Thereby, the angle of the display 45 can be changed to a predetermined inclination angle (LCD inclination angle for near field inspection) (see FIGS. 10 (a) and 10 (b)). In addition, when performing the original inspection, the projections 46 formed on the support portion 41 of the display 45 are pressed by the support portion 61 of the reflection mirror 62 in the B2 direction, and the inclination angle of the display 45 Is changed (see Fig. 10 (a)).

The optical path switching unit 60 includes a support portion 61, a reflection mirror (for example, a plane mirror) 62, a handle 63, a shaft (rotation shaft) 66, a rotation limiting portion (projection portion 67a), a stopper (67b)) (67) and a magnet 68 are provided. Each member of the optical path switching unit 60 is supported by the holding unit 10 via the base 65 in the same manner as the target display unit 4.

The reflective mirror 62 is connected to the shaft 66 via a support portion 61. The shaft 66 is held on the base 65 so that it can rotate around its axis. Thereby, the inclination angle of the support part 61 with respect to the holding unit 10 can be changed, and the reflection mirror 62 can be inserted and removed with an optical path. At this time, the amount of change of the inclination angle is the same as the target display section 4, and is limited by the rotation limiting section 67 (projection section 67a, stopper 67b). That is, the insertion position of the reflection mirror 62 is set by the rotation limiting portion 67.

In addition, the handle 63 is connected to the reflection mirror 62, so that the inspector operates the handle 63 to insert and remove the reflection mirror 62. In the original inspection, the reflection mirror 62 is held at a retracted position retracted from the optical path of the target display portion 4 by the magnetic force of the magnet 68 (see Fig. 10 (a)). Moreover, the magnetic force by the magnet 68 is a force stronger than the spring force of the spring 47 for changing the inclination angle of the display 45 of the target display unit 4. For this reason, the magnet 68 holds the reflection mirror 62 in the retracted position, and also presses the support portion 41 through the projection 46 to tilt the display 45 at the time of the original inspection (placement position) ). When the handle 63 is operated by the inspector and the reflection mirror 62 is inserted, the magnetic force of the magnet 68 that has pressed the projection 46 is lost. Thereby, the inclination angle with respect to the reference axis L1 of the display 45 is changed by the spring force of the spring 47 (see Fig. 10 (b)). As for the inclination angle of the display 45, when the screen of the display 45 in which the eye to be examined is reflected by the reflection mirror 62 in the direction of the reference axis L1 is viewed, the screen (imaginary screen) has the reference axis L1. It is set at an angle viewed as a screen perpendicular to. In addition, when switching from the near-inspection optical path to the far-inspection optical path, the inspector lifts the handle 63 and moves the reflection mirror 62 to the evacuation position.

In addition, in this embodiment, although it is set as the structure which holds the reflection mirror 62 in a retracted position using the magnet 68, it is not limited to this. It is sufficient as long as the reflection mirror 62 can be held in the retracted position. For example, a structure using a latch or the like may be used.

As described above, it is possible to easily switch the optical path for inspection for the original and the optical path for inspection for the near. In addition, since the inclination angle of the display 45 changes with the switching of the optical path, a target with reduced distortion can be projected in the subject even when the optical path is switched. Thereby, with the structure using the display which displays a target, the target timing can be performed for performing an accurate inspection.

The inspection by scheduled time is briefly described. The inspector instructs the forehead of the measurement unit 8 to touch the forehead of the subject. Then, by placing the forehead on the forehead 82, the eye to be placed in a certain position. At the time of the original examination, with the reflection mirror 62 deviating from the reference axis L1, the target is fixed through the concave mirror 50 on the reference axis L1 when the eye to be examined faces the front, and the subject is inspected. The target displayed through the inspection window 81 of the measurement unit 8 is observed, and the visual function is inspected. The control unit 70 controls the display of the display 45 based on the selection signal of the original target inputted by the controller 90, and causes the display 45 to display the original target.

At the time of near inspection, as described above, the angle of the display 45 is changed while the reflection mirror 62 is inserted into the reference axis L1. The control unit 70 controls the display of the display 45 based on the selection signal of the near target inputted by the controller 90 and causes the near target to be displayed on the display 45.

 <Variation example>

In addition, in the optical path switching unit 60 of the present embodiment, a handle 63 is formed to manually switch the optical path, but is not limited to this. For example, a drive mechanism for inserting and removing the reflective mirror 62 may be formed, and the driving mechanism of the reflecting mirror 62 may be controlled to switch the optical path by switching the mode for remote inspection or near inspection. .

In addition, in this embodiment, the display 45 is disposed in the vicinity of the forehead of the subject (near the forehead 82 of the measurement unit 8), and the near-use inspection and near-use inspection by insertion / removal of the reflection mirror 62 Although it was set as the structure in which the optical path of a dragon is switched, it is not limited to this. For example, as shown in Fig. 11, a reflection mirror 123 for changing the optical path is disposed near the forehead of the subject, and a display 120 for displaying a target is arranged on the concave mirror 50 side. , You may configure the optical path for the original inspection. The arrangement condition of the reflection mirror 123 is the same as the example of the display 45 shown in FIG. 5.

In the case of a device having such a configuration, the display 120 may be switched to remove the optical path. In this case, during the original inspection, the target luminous flux emitted from the display 120 is reflected by the reflection mirror 123, passes through the transparent panel 52 disposed on the case body 5, and concave mirror 50 Head to. The target luminous flux reflected by the concave mirror 50 passes through the transparent panel 52 again, and is guided to the eye under the reference axis L1 direction. Moreover, the inclination angle of the transparent panel 52 is the conditions as mentioned above.

In the case of near examination, the display 120 is inserted on the reference axis L1 in the optical path between the eye to be examined and the concave mirror 50, so that the display of the display 120 is directly observed from the eye to be examined. In addition, with the insertion of the display 120, the inclination angle of the display 120 is changed to an inclination angle for near inspection by means of an inclination angle changing means not shown. The inclination angle for near field inspection is an angle at which the screen of the display 120 is perpendicular to the reference axis L1. In this way, the optical path is switched. In addition, the inclination angle of the display 120 at the time of the original inspection is such that the screen (imaginary screen) of the display 120 observed in the direction of the reference axis L1 is positioned perpendicular to the reference axis L1. It is set according to the inclination of the reflection mirror 123 and the concave mirror 50.

Further, as another variation of this embodiment, by setting the reflection mirror 62 shown in Fig. 9 (b) along the reference axis L1, the inspection distance can be continuously varied from a short distance to a medium distance. For example, by shifting the reflection mirror 62 along the reference axis and changing the inclination angle of the display 45 to an inclination angle corresponding to each position after the reflection mirror 62 is moved, only the original inspection and near inspection are performed. No, it is also possible to inspect for medium distances.

Moreover, in this embodiment, although the structure which reduces the distortion of the target projected in the subject to be examined by changing the inclination angle of the display 45 is not limited to this. You may make it the structure which reduces distortion by image processing. For example, it is displayed in consideration of the distortion of the shape of the target displayed on the display 45. That is, the amount of occurrence of distortion corresponding to each optical path is calculated in advance, and a target displayed in consideration of the amount of occurrence is stored. In this way, a target with reduced distortion is projected into the subject.

In addition, in this embodiment, the reflection mirror 62 which is a plane mirror is used as a member for light path switching, but is not limited to this. As a member for optical path switching, a reflective member may be sufficient. For example, a concave mirror, a convex mirror, etc. are mentioned. When the convex mirror is used, the optical path is shortened, so that it may be inserted just before the concave mirror 50 in order to make the distance (for example, 40 cm) for near field inspection.

Moreover, in the said structure, it is better to adjust the angle of incidence of the target light beam to the concave mirror 50 and the reflection angle when reflected from the concave mirror 50 according to the curved surface shape (magnification) of the concave mirror 50. As the magnification of the concave mirror 50 is changed, the angle of incidence and the angle of reflection at which distortion occurs also changes. For example, when using a concave mirror having a higher magnification than the concave mirror of the present embodiment, it is necessary to adjust the incidence angle and the reflection angle to be more acute.

Moreover, the concave mirror 50 is not limited to a spherical surface. For example, a configuration using an aspherical mirror, a free-form mirror, or the like may be used.

2: Optometry table unit
3: Target on-time unit
4: Target display part
5: case body
6: Exterior cover
8: Awakening power measurement unit
10: holding unit
20: support arm
45: display
50: concave mirror
51: protection panel
52: transparent panel
53: shield
60: optical path switching unit
62: reflective mirror
70: control unit
72: memory
81: inspection window
90: controller

Claims (10)

An eye refractive power measuring unit having a pair of left and right lens chambers for switching and arranging optical elements in the inspection window is provided.
In the optometric device for specifying the inspection target in the test subject looking into the inspection window,
A target display unit which has a concave mirror and a display for displaying the target, and reflects the target luminous flux from the display by the concave mirror, thereby displaying the target in the test;
As a support means for supporting the eye power measuring unit to move between the test position and the evacuation position in front of the eye of the eye, the support means for integrally connecting the eye power measuring unit to the target display unit,
The support means includes up and down moving means for moving the eye refractive power measuring unit to an evacuation position above the inspection position,
The supporting means, the optometric apparatus characterized in that the eye refractive power measuring unit is integrally connected to the upper surface of the target display unit. delete According to claim 1,
In the inspection position, the optometric device, characterized in that the inspection window of the eye refractive power measuring unit and the target viewing window of the target viewing unit are arranged to face each other. An eye refractive power measuring unit having a pair of left and right lens chambers for switching and arranging optical elements in the inspection window is provided.
In the optometric device for specifying the inspection target in the test subject looking into the inspection window,
A target timing unit for marking targets in the subject,
As a support means for supporting the eye power measuring unit to move between the test position and the evacuation position in front of the eye of the eye, the support means for integrally connecting the eye power measuring unit to the target display unit,
The support means includes up and down moving means for moving the eye refractive power measuring unit to an evacuation position above the inspection position,
The supporting means, the optometric apparatus characterized in that the eye refractive power measuring unit is integrally connected to the upper surface of the target display unit. The method of claim 4,
In the inspection position, the optometric device, characterized in that the inspection window of the eye refractive power measuring unit and the target viewing window of the target viewing unit are arranged to face each other. According to claim 1,
The display is an optometric apparatus characterized in that the eye to be examined is disposed outside a predetermined viewing angle range when looking into the inspection window. According to claim 1,
It has a case body for storing the concave mirror therein,
The concave mirror is disposed on a reference axis set to see a target in which the eye to be examined is pointed in the front direction,
The display is disposed outside the reference axis outside the case body,
A transparent panel disposed on the front surface of the case body on the reference axis, and having a transparent panel that transmits a target light flux from the display, transmits the target light beam reflected by the concave mirror again, and emits it out of the case body. and,
The normal direction of the front surface of the transparent panel is arranged at an angle inclined with respect to the reference axis,
The angle is the reflected light reflected from the front surface of the transparent panel, the optometric apparatus characterized in that the reflected light of the light emitted from the display is set to face the direction away from the eye to be inspected at a predetermined position. The method of claim 7,
The case body has a shielding member disposed around the transparent panel on the front side of the concave mirror, and the transparent panel surrounded by the shielding member constitutes a viewing window for the eye to observe the target inside the case body. Optometry device characterized in that. delete delete

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