KR20140016831A - Optometric apparatus - Google Patents

Abstract

(Problem) The influence of the disturbance light external to a case body is reduced.
(Solution means) As a display which displays the case body and the case body which accommodate the inside of the concave mirror arrange | positioned on the set reference axis set in order to see the indication which an eye to examine is shown in the front direction, and arrange | positions outside a reference axis from the case body outside. And a transparent panel disposed on the front surface of the case body on the reference axis, the transparent panel which transmits the target light flux from the display, and transmits the target light flux reflected by the concave mirror again to exit the case body. An optometry device, in which the normal direction of the front surface of the transparent panel is disposed at an inclined angle with respect to the reference axis, and the angle is reflected light reflected from the front surface of the transparent panel, so that the reflected light of the light emitted from the display deviates from the eye to be examined at a predetermined position. It is set to face.

Description

Optometry device {OPTOMETRIC APPARATUS}

TECHNICAL FIELD This invention relates to the optometry which reveals the test | inspection table | surface for visual function test.

A light source such as a display plate, a halogen lamp for illuminating the display plate, a beam splitter formed obliquely, and a concave mirror are disposed in the case body so that the target beam of the display plate illuminated by the light source is transferred through the beam splitter and the concave mirror. A sight presenting apparatus that is light guided by the eye of an eye, and that inspects a test target is known (see Patent Document 1). In the case of such an apparatus, the protective cover is formed in the front surface of a case body, and each member in a case body is protected. Moreover, the sight cover which has a transparent plate is formed in the protective cover, and the target light beam radiate | emitted in the case body is radiate | emitted toward a to-be-tested eye from a sight window.

Japanese Laid-Open Patent Publication No. 06-197867

However, in the above-described apparatus, when a display displaying a target in place of the target plate is to be used, since the amount of light of the display is low, the amount of the target indicated through the beam splitter is insufficient, so that accurate inspection can be performed. none. Moreover, since the beam splitter of large size was formed obliquely conventionally, there existed a limit in space saving of a case body and the whole apparatus. Moreover, since it is a plate of the visual field window which inject | emits the visual flux from the inside of a case body, when a strong light is reflected from the transparent plate of a visual field window from outside of a case body, and the reflected light enters the eye of a subject, visual function test is performed with a good precision. You will not be able to.

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides an optometry device capable of performing timely display for accurate inspection while conserving space and consequently using a display that displays a timetable.

In order to solve the said subject, this invention is characterized by including the following structures.

(1) a case body accommodating therein a concave mirror disposed on a reference axis set in order to view an indication in which the eye to be examined is indicated in the front direction;

A display for displaying a timetable, comprising: a display disposed outside the reference axis outside of the case body;

A transparent panel disposed on the front surface of the case body on the reference axis, the transparent panel which transmits the target light flux from the display, and transmits the target light flux reflected by the concave mirror to exit the case body; As an optometry device to say,

The normal direction of the front surface of the transparent panel is disposed at an inclined angle 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 the reflected light of the light emitted from the display is directed toward the direction away from the eye to be examined at a predetermined position.

(2) In the optometry of the above (1),

The case body has a shielding member arranged around the transparent panel at 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 a target inside the case body. do.

(3) In the optometry of the above (1),

It is further provided with an eye refractive index measurement unit having a pair of left and right lens chamber units for switching and placing the optical element in the inspection window,

The eye refractive index measurement unit is disposed such that the inspection window is located at a height position of the reference axis.

(4) the optometry device (3),

Support means for supporting the eye refractive index measurement unit so as to be movable between the test position and the retracted position in front of the eye of the eye to be examined, comprising a support means formed on the visual display unit having the case body and the display.

(5) the optometry device (4),

Optometry table,

Holding means for holding the target device on the optometry table;

The said support means is formed in the said target display unit via the said holding means.

(6) the optometry device (5),

The holding means includes a first holding member for holding the case body at a predetermined distance from the eye refractive index measuring unit placed at an inspection position, and a second holding member extending from the first holding member to hold the display. And a second holding member extending from above of the case body to the subject side,

The supporting means is connected to the second holding member.

(7) In the optometry of (6),

The said support means is an up-and-down movement means attached to the said 2nd holding member, and is provided with the up-and-down movement means which moves the said refractive index measurement unit to the retracted position above an inspection position.

(8) the optometry device (3),

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

(9) In the optometry of the above (8),

The case body is a case body having a viewing window disposed on the front surface of the concave mirror, and is disposed in the front direction of the eye refractive index measurement unit,

The said display is arrange | positioned in the position which directs the target beam from the said display body toward the said concave mirror from the exterior of the said case body via the said viewing window.

(10) In the optometry of the above (9),

The display is disposed around the eye refractive index measuring unit, and emits a target light beam toward the concave mirror on the side to be examined.

According to the present invention, with the configuration using the display displaying the target, the target time for performing an accurate inspection can be performed. Moreover, the influence of the disturbance light outside the case body can be reduced.

1 shows an external view of an optometry according to the present invention.
2 is a front view of an optometry device.
3 is a cross-sectional view of an optometry device.
4 shows a front view of the index display unit.
It is a figure explaining the arrangement position of a display.
6 shows a schematic configuration diagram of a case body.
It is a figure explaining the evacuation means of a measuring unit.
8 is a control block diagram of an optometry device.
It is a figure explaining the switching between a far-use inspection optical path and a near-use inspection optical path.
10 is a view showing a schematic configuration diagram of the index display unit and the optical path switching unit.
It is a figure which shows the modification of an optometry device.

Best Mode for Carrying Out the Invention Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1-11 is a figure explaining the structure of the optometry apparatus which concerns on this embodiment.

<Overview>

An outline of an optometry device according to an embodiment of the present invention will be described. The optometry 1 according to the present embodiment includes a visual presentation unit 3 and an subjective refractive index measurement unit 8 (hereinafter abbreviated as measurement unit 8). The optometry 1 uses the target display time unit 3 to display a target in the examination using an optical inspection path (a circular optical inspection path), and examines the function at the time of application of the examination eye (a visual function at the time of origin). The measuring unit 8 has a pair of left and right lens chamber units 80 for arranging and arranging optical elements (for example, corrective lenses) in the inspection window 81. For example, the optometrist 1 defines an inspection target in the examination object that looks into the inspection window 81 of the measurement unit 8, and inspects the function at the time of the application of the examination eye.

In addition, the optometry 1 has an optometry table (optometry table unit) 2 and a holding means (holding unit) 10. The holding unit 10 holds the measuring unit 8 so that the inspection window 81 is located at the same height as the reference axis L1 while holding the display timing unit 3. For example, the holding unit 10 holds the index setting unit 3 on the optometric table unit 2.

In addition, the time display unit 3 is not limited to the structure hold | maintained in the optometry table unit 2 by the holding unit 10. FIG. For example, the structure in which the holding | maintenance unit 10 is equipped with the structure of a wall-hanging type, and the indication time display unit 3 is provided in a wall is mentioned.

The target display unit 3 has a concave mirror 50 and a display 45 for displaying the target. The index setting unit 3 reflects the index light beam emitted from the display 45 by the concave mirror 50 and optically scans the index to a predetermined distance test distance. For example, the target display unit 3 inclines and arrange | positions the normal line direction with respect to the screen of the display 45 with respect to the optical axis O1 of the concave mirror 50, and arrange | positions a target light flux with the concave mirror 50 The light is incident on the optical axis O1 by shifting it.

For example, an LCD (Liquid Crystal Display) or an organic EL (Electro Luminescence) 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 front direction when the eye to be examined looks front. For example, the concave mirror 50 is housed in the case body 5.

For example, the case body 5 has a viewing window (for example, the 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 on. The transparent panel 52 transmits the target beam of light from the display 45, and passes through the target beam of light reflected by the concave mirror 50 to exit the case body 5.

With this configuration, the target display unit 3 is configured to display the target without passing through a beam splitter having a large amount of light loss in the target light beam, thereby ensuring luminance required for visual inspection or the like without using a display that generates a large amount of light. An inspection can be carried out accurately. In addition, since the case body 5 does not have a beam splitter, the case body 5 can be made thin and an optometry device with more space can be realized.

Hereinafter, each configuration will be described in detail. In the following description, the display 45, the transparent panel 52, the optical path switching unit 60, and the subjective refractive index measurement unit will be described in order. Moreover, while the following structures can be combined suitably, you may implement as an independent structure.

<Display>

The display 45 is disposed outside the reference axis L1 outside of the case body. In addition, the display 45 is arrange | positioned outside the predetermined viewing angle range when the eye to examine peeps out the inspection window 81 of the measurement unit 8.

For example, the display 45 is disposed outside of the case body 5, and the display beam is connected to the concave mirror 50 from the outside of the case body 5 via the transparent panel 52 from the outside of the case body 5. It is located in the facing position. More specifically, for example, the display 45 is disposed around the measurement unit 8 and emits the target light beam from the eye to eye toward the concave mirror 50. Also, for example, the display 45 is arranged around the forehead 82 of the measuring unit 8. In other words, for example, the display 45 is arranged at a position above the forehead 82 of the measuring unit 8.

By arranging the display 45, a wide field of view can be secured to the subject. And when a subject observes the original target in the case body 5 through the transparent panel 52, it does not see the display 45 which is an extra structure from the protection panel 51 to the examinee side. As a result, the examinee can no longer watch the display 45, and the intervention of the adjustment of the eye can be reduced by seeing structures other than the target during the original inspection. Then, the visual check can be performed with good precision.

In addition, the display 45 does not need to be arrange | positioned outside the predetermined viewing angle range at the time of 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 display beam 50 is connected to the concave mirror 50 from the outside of the case body 5 via the transparent panel 52 from the outside of the case body 5. As a position to aim, what is necessary is just the structure arrange | positioned near the forehead of a subject. Thus, by arranging the display 45 near the forehead of the subject, when the target beam is emitted toward the concave mirror 50, the incident angle to the concave mirror 50 and the concave mirror 50 will be reflected. The reflection angle at the time is small. Therefore, the distortion of the target can be reduced.

<Transparent panel>

In the transparent panel 52 formed in the case body 5, the normal direction of the front surface of the transparent panel 52 is arrange | positioned at the inclined angle with respect to the reference axis L1. In addition, the inclination angle of the transparent panel 52 is set so that the reflected light which is radiate | emitted from the display 45 and reflected on the front surface of the transparent panel 52 may face in the direction which deviates from the to-be-tested eye of a predetermined position.

Thereby, when the strong light of the display 45 reflected by the transparent panel 52 enters into a to-be-tested eye, the problem which obstructs the target observation of a test subject can be alleviated. In addition, since the disturbance light of the back background of the examinee and the disturbance light of the upper side of the optometry device 1 are reflected by the transparent panel 52 and enter into the eye, it is possible to alleviate the problem of obstructing the observation of the subject.

For example, in the case body 5, a shielding member (shielding portion 53) is arranged around the transparent panel 52 at the front side of the concave mirror 50, and is surrounded by the shielding portion 53. The panel 52 may configure the eye to be examined to observe the target from inside the case 5. By forming the shield part 53, the internal structure of the case body 5 becomes hard to see. Of course, it is also possible to use a configuration in which only the transparent panel 52 is provided in the window of the window, and the shielding portion 53 is not formed.

In addition, it is good also as a 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 providing such a structure of a shielding member, it has an effect which suppresses incidence of the disturbance light by a fluorescent lamp etc. to the optical member in an apparatus.

Moreover, in this embodiment, although the shielding cover 6 combines an upper shielding member and a side shielding member, you may be comprised by separate members, respectively. In addition, it is good also as a structure which forms only one of an upper shielding member and a side shielding member of a present Example.

&Lt; Optical path switching means &

Moreover, the optometry 1 switches the near-inspection optical path (inspection optical path at the time) which guides the target beam from the display 45 to the eye without passing through the reflection for the original inspection light 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 circle inspection and the near inspection.

In the angle changing means, the screen is positioned approximately perpendicular to the reference axis L1 when the eye to be examined sees the screen of the display 45 when the optical path switching means is switched between the far-inspective 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 which inclines the screen of the display 45, the screen of the display 45 is not limited only to vertical. The inclination angle of the screen of the display 45 does not need to be completely perpendicular to the reference axis L1, but may be configured to incline to such an extent that the target whose distortion is reduced can be projected into the examination. That is, the inclination angle of the screen of the display 45 may be configured to incline substantially vertically.

For example, the optical path switching means has a reflective member (reflective mirror) 62 that can be inserted and detached 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 optical inspection path for far inspection and the optical inspection path for near inspection 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, the angle changing means includes a normal line direction with respect to the screen of the display 45 and a direction in which the reference axis L1 is reflected by the reflecting member 62 at the time of switching to the near-inspection optical path. The inclination angle of the screen of the display 45 is changed so that this approximately coincides. That is, the angle changing means may be configured such that, when switching to the near-inspection optical path, the target beam of light emitted in 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 tilt angle.

Moreover, as a structure which changes the inclination angle of the screen of the display 45, when switching to the optical path for near-inspection, the normal direction and the reference axis L1 with respect to the screen of the display 45 are the reflection member 62 It is not limited only to the structure which changes so that the direction of the axis reflected by) may match. The change of the inclination angle of the screen of the display 45 does not need to completely coincide with 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 reflecting member 62. What is necessary is just a structure which changes the inclination-angle so that the target to which distortion was reduced can be projected on an examination object. That is, the configuration for changing the inclination angle of the screen of the display 45 is changed so that the normal line direction with respect to the screen of the display 45 and the direction of the axis reflected by the reflective member 62 with the reference axis L1 are substantially coincident with each other. What is necessary is just a structure to say.

Further, at the time of switching to the circular inspection optical path, the inclination of the screen of the display so that the normal direction with respect to the screen of the display 45 and the direction of the axis of which the reference axis L1 is reflected by the concave mirror 50 substantially coincide. Change the angle That is, at the time of switching the circular inspection optical path, the inclination angle of the screen of the display is changed so that the target light beam emitted in 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.

Moreover, in the structure which changes the inclination-angle of the screen of the display 45, at the time of switching to the circular inspection optical path, the normal direction and the reference axis L1 with respect to the screen of the display 45 are concave mirror ( It is not limited only to the structure which changes so that the direction of the axis reflected by 50) may correspond. The change of the inclination angle of the screen of the display 45 does not need to completely coincide with the direction of the normal to the screen of the display 45 and the direction of the axis on which the reference axis L1 is reflected by the concave mirror 50. What is necessary is just a structure which changes the inclination-angle so that the target to which distortion was reduced can be projected on an examination object. In other words, the configuration for changing the inclination angle of the screen of the display 45 is such that the normal direction with respect to the screen of the display 45 and the direction of the axis of the reference axis L1 reflected by the concave mirror 50 substantially coincide with each other. What is necessary is just a structure to change.

As described above, the optical path switching means inserts or removes a reflective member that reflects the target light beam from the display and guides the eye to the eye, or the display into the optical path between the eye and the concave mirror. The optical path is switched by the configuration including the moving means for moving. This makes it possible to easily switch between the far inspection light path and the near inspection light path. In addition, since the inclination angle of the display 45 is changed in accordance with the switching of the optical path, even when the optical path is switched, a target in which distortion is reduced can be projected into the subject. Thereby, the index display for performing a proper inspection can be performed with the configuration using the display for displaying the target.

Moreover, as a modification, the structure which the optical path switching unit 60 is equipped with the inclination-angle changing means (2nd angle changing means) for reflection members for changing the inclination angle of a reflection member is mentioned, for example. In this case, the optical path switching unit 60 moves the reflecting member 62 on the reference axis L1 while the reflecting member 62 is inserted between the eye to be examined and the concave mirror 50. 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. Moreover, the angle changing means changes the inclination angle of the screen of the display 45 so that the normal direction with respect to the screen of the display 45 and the direction of the axis where the reference axis L1 is reflected by the reflecting member 62 substantially coincide. . As a result, it is possible to perform not only long-distance testing but also long-distance testing.

For example, as a modification of the optometry device 1, an optical path changing mirror (reflecting mirror) 123 disposed near the forehead of the eye to be examined is provided, and the optical inspection path for the original inspection is such that the display 120 is a concave mirror. The structure which is arrange | positioned at the 50 side, and reflects the target light beam from the display 120 by the optical path changing mirror 123, and faces the concave mirror 50 is mentioned. In this case, the optical path switching means includes a configuration of switching the optical inspection path for near inspection and the optical inspection path for near inspection by inserting the display 120 into the optical path between the eye to be examined and the concave mirror 50. 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.

&Lt; Objective eye refractive power measurement unit >

The measuring unit 8 is moved at the test position and the retracted position before the eye of the eye, depending on whether it is used for visual function examination.

For example, the holding unit 10 is provided with supporting means (for example, a supporting arm 20). The support means supports the measuring unit 8 so as to be movable between the test position and the retracted 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 (holding) 10a and a second holding member (upper holding) 10b extending from the support 10a. The strut 10a holds the case body 5 at a position separated by a predetermined distance from the measuring unit 8 placed at the inspection position. The upper support 10b extends from the support 10a, and is configured to extend from the upper part of the case body 5 to the subject side in order to hold the display 45. The supporting means is connected to the upper support 10b.

For example, the support means for supporting the measurement unit 8 so that the movement is possible between an inspection position and a retracted position is mentioned using the support arm 20 and a support member (for example, a support | pillar).

For example, when using the support arm 20 as a support means, the support arm 20 is connected to the upper support 10b, and the structure which can turn around the connection position O is mentioned. And the support arm 20 supports the measurement unit 8 so that it can move between an inspection position and a retracted position by turning of the support arm 20. This leads to compactness of the apparatus and further space saving.

In addition, in this embodiment, when the connection position O is connected in the position moved to the up-down direction with respect to the ground from the center axis (center axis of left and right eyes) C of the optometry device 1, for example, Even better. Thus, by connecting the connection position O in the position which moved from the center axis C of the optometry device 1, it becomes possible to move the measurement unit 8 to a smaller movable range. Thereby, since the movable range is small when the measuring unit 8 is moved, the possibility of contacting the inspector is reduced.

Moreover, when using a support member, a support member is a support member provided with the vertical movement means (for example, a well-known telescopic pipe mechanism), and is attached to the upper support 10b. The configuration of moving the measuring unit 8 to the retracted position above the inspected position makes it possible to move the measuring unit 8 between the inspected position and the retracted position. As a result, since the measuring unit 8 does not cross the face of the inspector when the measuring unit 8 is moved, the possibility of contacting the inspector can be reduced.

In addition, in this embodiment, although the support means connected with the measuring unit 8 set it as the structure formed in the visually visibility unit 3 via the holding unit 10, it is not limited to this. For example, the holding means may be connected to the target time setting unit 3 without interposing the holding unit 10 therebetween.

<Examples>

EMBODIMENT OF THE INVENTION Hereinafter, the form of this invention is described based on drawing. 1 shows an external view of an optometry according to the present invention. FIG. 2 has shown the front view of the optometry 1 which observed the optometry 1 from the X direction of FIG. In addition, the front view of the optometry of FIG. 2 has shown the optometry 1 in the case where the subjective refractive index measurement unit 8 is arrange | positioned in a retracted position (it mentions later for details). 3 shows a cross-sectional view of the apparatus when the optometry 1 is cut into the A-A plane of FIG. 2. 3, the measurement unit 8 is omitted.

The optometry device 1 includes an optometry table unit 2, a target display unit 3, and an subjective refractive index measurement unit 8 (hereinafter abbreviated as the measurement unit 8). The optometry 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 instruction signal for vertical movement of the table 2a. . The vertical drive unit 2b includes a drive source such as a motor, and the drive source is driven by an instruction signal input from the switch 2c.

The target display unit 3 includes a case display unit 4 having a display 45 for displaying a target, a case body 5 in which a recess mirror 50 is housed, an exterior cover (shielding cover) 6, and the following description. The optical path switching unit 60 is provided. The target display unit 3 is held by a holding unit 10 having a support formed by standing on the table 2a. As an example of the preferable holding | maintenance unit 10, the case body 5 is attached to and hold | maintained in the 1st holding member (support) 10a which stood and formed in the edge of the table 2a. The holding unit 10 extends from the support 10a, and extends from the upper side of the case body 5 to the examinee side (the front side of the case body 5) in order to hold the display 45 ( It has an upper post 10b, and the target display part 4 is attached to the front part of the upper post 10b.

In addition, the measuring unit 8 is held in the holding unit 10 to be able to move between the measuring position and the retracted position. As a preferred example, the measuring unit 8 is supported on the upper strut 10b so as to be able to move between the measuring position and the retracted position via the supporting member (for example, the support arm) 20. The target display unit 3, the optometry table unit 2, and the measurement unit 8 constitute an integrated optometry device 1. However, the optometry 1 may be configured without the measuring unit 8.

The measurement unit 8 includes a pair of left and right lens chamber units 80 in which various optical elements (spherical lens, circumferential lens, auxiliary lens, etc.) for imparting refractive power to the examination object are switched to the left and right inspection windows 81. It is provided. In addition, the measurement unit 8 is provided with the forehead 82 for making the to-be-tested eye into a predetermined positional relationship with respect to the inspection window 81. As shown in FIG. 1, when the measuring unit 8 is located at a measurement position, it is set so that the inspection window 81 may be located in the height of the predetermined reference axis L1 at which the target is indicated by the concave mirror 50. It is.

The target display unit 3 reflects the target beam of light from the display 45 disposed outside the case body 5 by the concave mirror 50 to face the eye to be examined, and optically a predetermined distance inspection distance (e.g., For example, the target is set at the inspection distance of 5 m. In addition, by the reflection member 62 is inserted between the concave mirror 50 and the eye to be examined, the sight presenting unit 3 reflects the target beam of light from the display 45 by the reflecting member 62 to face the eye to be examined. Thus, the apparatus is switched to a near sight display unit that displays 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 having a large amount of light loss in the target beam, it is possible to accurately perform an inspection that ensures the luminance necessary for vision inspection without using a display that generates a large amount of light. It can be carried out. In addition, since the case body 5 does not have a beam splitter, the case body 5 is thin in shape, and an optometry device with more space can be realized.

<Target Indicator>

3, the target display section 4 includes a support section 41 and a display 45 for displaying a target. The display 45 is supported by the support part 41. The support part 41 is hold | maintained at the base 65 via the shaft (rotation shaft) 42 mentioned later. The base 65 is supported by the holding unit 10. In this way, the target display portion 4 is supported by the holding unit 10. The display 45 displays an inspection target such as a Landolt ring target. For example, an LCD (Liquid Crystal Display) or an organic EL (Electro Luminescence) is used as the display 45. In the present embodiment, the following description will be given taking the case where LCD is used as the display 45 as an example.

4 shows a front view of the target display portion 4. The display 45 is supported by the support part 41, and the board | substrate etc. of the display 45 which are not shown in figure are arrange | positioned at the support part 41. On the surface of the support portion 41, a mask plate (cover) 49 for covering a member such as a substrate is formed. 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 examination. The mask plate 49 is formed of, for example, an iron plate coated with a black acrylic resin or a black coating. This prevents the substrate or the like around the display 45 from being visible in addition to the screen of the target indicated in the examination object. Moreover, by using the black mask plate 49, the background of the projected object can be made black, and the target becomes easy to confirm. Of course, the mask plate 49 may not be black.

5 is a diagram illustrating an arrangement position of the display 45. The display 45 is arrange | positioned so that it may be out of the predetermined viewing angle (alpha) 1 range from the inspection window 81 when a subject looks in the inspection window 81 of the measuring unit 8, and observes a target. That is, the viewing angle α1 is a viewing angle centered on the reference axis (center axis of the left and right eyes) L1 when the eye to be examined faces the front through the inspection window 81 of the measuring unit 8. In 8), it is designed depending on the size of the opening of the inspection window 81 formed on the side farther from the eye to be examined. The view angle alpha 1 of the measurement unit 8 is set at, for example, 40 degrees around the reference axis L1. Moreover, the up-and-down position of the reference axis L1 is a position substantially the same as the measurement optical axis of the inspection window 81 of the measurement unit 8 (optical axis of the spherical lens arrange | positioned at the inspection window 81). The left and right positions of the reference axis L1 are approximately the same positions as the left and right center positions of the inspection windows 81 on the left and right sides. The concave mirror 50 is arranged on the reference axis L1 in the front direction of the eye to be placed at a predetermined position.

The concave mirror 50 of the concave mirror 50 of the concave mirror 50 (the concave mirror 50) is used to reflect the target beam of light from the display 45 disposed outside the reference axis L1 toward the eye to be examined. The curved normal direction) is inclined with respect to the reference axis L1. The display 45 is arranged on the axis L2 which is the 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 the axis (normal direction) perpendicular to the screen of the display 45 is the direction of the axis L2. Thus, when the eye to be examined looks at the screen of the display 45 reflected by the concave mirror 50, the screen can be viewed as a screen positioned perpendicular to the reference axis L1.

In the present 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 (ie, the forehead of the subject) of the measuring unit 8 at a position above the inspection window 81, and the concave mirror 50 from the eye side. The target beam is emitted toward). Moreover, the arrangement position of the display 45 in the left-right direction is a center position at the time of a test subject being intimate with the concave mirror 50.

In addition, 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. In other words, the target light flux emitted from the display 45 is reflected by the concave mirror 50, and the reflection angle when the light is guided to the eye to be examined is 5 degrees. In addition, the inclination angle of the axis L2 of the display 45 with respect to the optical axis O1 is 5 degrees. That is, the incident angle when the target light beam emitted from the display 45 enters the concave mirror 50 is 5 °.

The tilt angle of the display 45 and the tilt angle of the concave mirror 50 are set so that the configuration described above is achieved. By setting it as such a structure, generation | occurrence | production of the distortion of the target shown to the to-be-tested object can be suppressed. In addition, in the present embodiment, as described above, by placing the display 45 near the forehead of the subject, the incident angle and the concave angle with respect to the concave mirror 50 when the target beam is emitted toward the concave mirror 50. The reflection angle at the time of reflecting from the surface mirror 50 is made small. For this reason, distortion of a target can be made small. In this way, with the configuration using the display displaying the target, the target time for accurate inspection can be performed while saving the space.

In addition, in this Example, although it set as the structure of incident angle 5 degrees and reflection angle 5 degrees, it is not limited to this. What is necessary is just to comprise with the incidence angle and reflection angle which generate | occur | produce the target distortion little.

In addition, in the present embodiment, a fine shielding wall 69 is formed below the display 45. Thereby, for example, the light beam incident on the eye to be examined directly from the display 45 when the device is used in a dark room or the like can be efficiently removed. In addition, in this embodiment, the shielding wall 69 is comprised as a part of shielding cover 6. The shielding cover 6 protrudes below the display 45 and serves as the shielding wall 69.

By arranging the display 45, a wide field of view can be secured to the subject. And when a subject observes a circular target inside the case body 5 through the visual sight window (transparent panel 52), the subject sees the display 45 which is an extra structure from the protection panel 51 to the examinee side. This disappears. As a result, the examinee can no longer watch the display 45, and the intervention of the adjustment of the eye can be reduced by seeing structures other than the target during the original inspection. Then, the visual check can be performed with good precision.

In addition, although the viewing angle of the inspection window 81 of this embodiment is about 40 degrees, it is not limited to this. In the case of using the measurement units 8 having different types, the size and shape of the inspection window 81 are various, and the viewing angles from the inspection window 81 of each type of measurement unit 8 are different. The viewing angle also changes depending on the distance from the eye to the inspection window 81 of the measurement unit 8. In this respect, it is better to fine-tune the arrangement position of the display 45 according to the viewing angle. In this embodiment, the distance from the eye to the inspection window 81 of the measurement unit 8 is kept constant by placing the forehead of the subject at the forehead 82.

<Optical path switching unit>

The optical path switching unit 60 includes a support portion 61, a reflection mirror (for example, a flat mirror) 62, and a handle 63. The optical path switching unit 60 switches the far-inspection optical path and the near-inspection optical path by the configuration in which the reflective mirror 62 is inserted into and removed from the reference axis L1 when the eye to be examined faces the front (details will be described later). ).

<Case body>

6 shows a schematic configuration diagram of the case body 5. FIG.6 (a) is a figure explaining the optical arrangement of each member. FIG.6 (b) is a figure explaining the surface reflection by the protective panel 51. FIG. The case body 5 is a case which accommodates the concave mirror 50. The case body 5 has a protective panel 51 disposed on the front side (reflection surface side) of the concave mirror 50. The protective panel 51 is provided with the transparent panel 52 which consists of transparent members, such as an acrylic resin and a glass plate, and the shielding part 53 arrange | positioned around the transparent panel 52. As shown in FIG. The transparent panel 52 passes through the target beam of light from the target display portion 4 (display 45) disposed outside the case body 5, and passes through the target beam of light reflected by the concave mirror 50. It exits to the exterior of the case body 5 (takes out).

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

The transparent panel 52 plays a role of the visual viewing window when the examinee observes the target inside the case body 5. The examinee sees the target in the center through the transparent panel 52 of the target window. As for the shielding part 53, black coating and a black filter are affixed, for example on the back surface (inner case body) side. Moreover, the inside of the case body 5 is painted black, and the internal structure is hard to see. By the case body 5 having the protective panel 51, dust is attached to the concave mirror 50 configured with high precision or a scratch is generated. The concave mirror 50 is disposed on the reference axis L1 when the eye to be examined faces 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 5 m. have.

The transparent panel 52 is such that the inclination angle θ of the normal line (normal direction) L3 of the transparent panel 52 plane with respect to the reference axis L1 is a predetermined angle (for example, 10 ° or more). It is arranged inclined. The angle θ is set to an angle in which the reflected light is directed toward the direction away from the eye when the light from the target display portion 4 (display 45) is reflected on 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 is incident on the eye, the reflected light is subjected to the observation of the visual observation which is indicated through the concave mirror 50. It gets in the way. In addition, when the disturbance light of the background behind the subject and the disturbance light of the upper part of the apparatus 1 are reflected by the transparent panel 52, and it enters into a to-be-tested eye, it obstructs the target observation of a subject. In this apparatus, these problems can be alleviated by setting the angle (θ) as described above, and the timetable for accurate inspection can be performed with a configuration using a display that displays a target, while saving space. It can be carried out.

<Shielding Cover>

In addition, in order to suppress incidence of extraneous light to the optical member (display 45, reflection mirror 62, protective panel 51, and concave mirror 50) which the visibility display unit 3 has, the shielding cover 6 ) Is disposed at the upper position and the lateral position of the upper post 10b of the holding unit 10. The shielding cover 6 covers the upper side of the apparatus and the upper side than the reference axis L1, and has an effect of suppressing the incident of extraneous light by a fluorescent lamp or the like into the optical member in the apparatus. In addition, in the present Example, although the shielding cover 6 was set to the upper position and the side position, it is not limited to this. The shield cover 6 may preferably be arranged at an upper position. Alternatively, the shielding cover 6 at the side position may be omitted.

&Lt; Movement mechanism of the subjective eye refractive power measurement unit >

The measuring unit 8 is supported by the holding arm 10 at the upper position on the central axis C of the plane of the inspection window 81 of the measuring unit 8. Of course, the position which the support arm 20 supports is not limited to the upper position on the center axis C of the surface which the inspection window 81 makes. It is sufficient that it is supported by the support arm at any position of the measurement unit 8. [

In addition, the support arm 20 is connected to the holding unit 10 so as to be able to freely rotate (swivel). Thereby, the measuring unit 8 supported by the support arm 20 is comprised so that it can rotate freely with respect to the holding unit 10. The inspector places the measuring unit 8 at the inspection position before the eye of the eye. The examinee places the subject in a fixed position by bringing the forehead to the forehead 82 of the measuring unit 8. Then, the target is observed through the inspection window 81 of the measuring unit 8 in this state, and the visual function is inspected.

In addition, the measuring unit 8 is comprised so that the support arm 20 can rotate freely with respect to the holding unit 10. As shown in FIG. FIG. 7: is a figure explaining the evacuation means of the measuring unit 8. FIG. FIG.7 (a) has shown the front view of the apparatus at the time of arrange | positioning the measuring unit 8 to a test | inspection position (measurement position), and the top view at the time of seeing an apparatus from the F direction. FIG.7 (b) has shown the front view of the apparatus at the time of arrange | positioning the measuring unit 8 to a retracted position, and the top view at the time of seeing an apparatus from the F direction.

When the measuring unit 8 is moved between the inspection position and the retracted position, the measuring unit 8 pivots on an arc around the connecting position O of the support arm 20 and the holding unit 10. Let's do it. That is, by moving the measuring unit 8 pivotally about the connection position O of the support arm, the measuring unit 8 is measured with respect to the reference axis L1 (concave mirror 50). This is moved from the test position and the retracted position.

Here, for example, when the connection position O is located on the central axis C, the measuring unit is not interfered with the shield cover 6 or the holding unit 10 when the measuring unit 8 is moved. It is necessary to lengthen the distance between (8) and the shielding cover 6 or the holding unit 10. That is, since the movable range at the time of circular arc movement needs to be enlarged in order to avoid interference, the length W of the support arm 20 must be made longer.

In the present embodiment, in the plan view of FIG. 7, the connecting position O is connected at the position moved in the vertical direction with respect to the ground from the center axis C of the apparatus. Thus, by connecting the connection position O in the position moved from the center axis C of the apparatus, it becomes possible to move the measuring unit 8 to 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 reduced, interference with the shield cover 6 and the holding unit 10 does not occur.

For example, in the plan view, when the connecting position O is positioned above the central axis C (leftward with respect to the ground in the front view), the measuring unit 8 is moved to the leftward direction of the eye to be examined. The movable range of the turning movement becomes small. In addition, in the plan view, when the connection position O is located below the center axis C (rightward direction with respect to the ground of the front view), when the measurement unit 8 is moved to the right direction of the eye to be examined, The movable range of the turning movement becomes small.

As described above, the measuring unit 8 is integrally connected to the visual display unit 3, and the connecting position O is moved from the center axis C of the apparatus, thereby making it possible to measure the measuring unit 8 in a smaller moving range. ) Can be evacuated. This leads to compactness of the apparatus and further space saving. In addition, since the movable range is small when the measuring unit 8 is moved, the possibility of contacting the inspector is reduced.

In addition, in this embodiment, the support arm 20 connected to the upper support 10b is configured such that the support arm 20 can be connected (turned) around the connecting position, and the measuring unit 8 is moved by the pivoting movement of the support arm 20. Although it was set as the structure which moves in a test | inspection position and a retracted position, it is not limited to this. It is good also as a structure which mounts a vertical movement means to the upper support 10b of the holding unit 10, and moves the measurement unit 8 to the retracted position above a test | inspection position. For example, the measuring unit 8 is connected to the holding unit 10 so that it can freely stretch by a known telescopic pipe mechanism. Then, the measuring unit 8 is moved up and down to thereby retract the measuring unit 8. [ As a result, the measurement unit 8 does not cross the face of the inspector when the measuring unit 8 is moved, so that the possibility of contacting the inspector can be reduced. When the measurement unit 8 is evacuated by vertical movement, the measurement unit 8 may be prevented from entering the visual field of the eye to be examined.

In addition, you may form the structure which the measuring unit 8 can move up and down with respect to the support arm 20, and the measuring unit 8 may be moved up and down. Of course, a retraction means may be comprised by combining up-down movement and turning movement.

<Control section>

8 is a control block diagram of an optometry device. The control unit 70 is connected to the measurement unit 8, the display 45, the controller 90, the memory 72, and the like. In the memory 72, a large number of data of the inspection target such as the Landolt ring target are stored. For example, target data with visual acuity values of 0.1 to 2.0 are stored. The control unit 70 calls corresponding target data from the memory 72 in accordance with an input signal from the controller 90 to control the display of the display 45 and displays the target on the screen of the display. In addition, in the present embodiment, the signal from the controller 90 is input to the controller 70 via a cable (not shown), but the signal may be input by wireless communication such as infrared rays.

<Optical path conversion>

In the present apparatus, an optical path switching unit 60 for switching between an optical path for a distance inspection and an optical path for near vision inspection is formed at the index time of the indexing unit 3. Hereinafter, the optical path switching will be described. It is a figure explaining the switching between the far-inspection optical path and the near-inspection optical path. Fig. 9A shows the original inspection optical path. Fig. 9B shows the optical path for near inspection. In addition, the measurement unit 8 is abbreviate | omitted in FIG.

When visual function inspection is performed with the circular inspection optical path, the target light beam is emitted from the display 45 toward the concave mirror 50, and the target light beam reflected by the concave mirror 50 is shown in the inspection object. The subject observes the indicated schedule and performs a visual function test for the original.

In the case of performing the visual function test with the near-inspection optical path, 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 on which the reference axis L1 is reflected by the reflection mirror 62 substantially coincide. do.

Then, the target light beam emitted from the display 45 is guided to the eye under the reference axis L1 without passing through the concave mirror 50. Since the target beam is guided to the eye under examination without passing through the concave mirror 50, the inspection distance is short (for example, 40 cm).

When switching to the circular inspection optical path, the display (such that the normal direction to the screen of the display 45 and the reference axis L1 is substantially coincident with the direction of the axis L2 reflected by the concave mirror 50) 45) Change the tilt angle of the screen.

Hereinafter, an apparatus configuration for switching the optical path will be described. Fig. 10 is a view showing a schematic configuration diagram in the index display section 4 and the optical path switching unit 60. Fig. FIG. 10 (a) shows the indicator display unit 4 and the optical path switching unit 60 at the optical path for circular inspection. FIG. 10 (b) shows the indicator display portion 4 and the optical path switching unit 60 at the optical path for near inspection.

The target table display section 4 is configured to change the tilt angle of the display 45 and includes a shaft 42, a rotation restricting section (protruding section 44a, stopper 44b) 44, a display 45, 46, and a spring 47 are provided. Each member of the index 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 in the base 65 so that it can rotate about its axis. Thereby, the inclination angle of the display 45 with respect to the holding unit 10 can be changed.

In addition, 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 for rotating the shaft 42 in the normal B1 direction (see Fig. 9) (the force for tilting the display 45). At this time, the rotation amount is limited by the rotation limiting section 44. That is, the inclination angle of the display 45 is limited to the predetermined angle by the rotation limiting portion 44. The rotation restriction part 44 is comprised from the projection 44a and the stopper 44b. The protrusion 44a is formed on the shaft 42. [ The stopper 44b is held on the base 65. [ When the shaft 42 rotates a predetermined amount, the projection 44a formed on the shaft 42 is fitted to the stopper 44b to stop the rotation of the shaft 42. Thereby, the display 45 becomes possible to change angle to a predetermined inclination angle (LCD inclination angle for near inspection) (refer FIG. 10 (a), (b)). In addition, when performing circular inspection, the projection part 46 formed in the support part 41 of the display 45 by the support part 61 of the reflection mirror 62 is pressed in the B2 direction, and the inclination angle of the display 45 is carried out. Is suppressed (see Fig. 10 (a)).

The optical path switching unit 60 includes a support 61, a reflection mirror (for example, a flat mirror) 62, a handle 63, a shaft (rotation shaft) 66, a rotation limiter (projection portion 67a, a stopper). (67b)) 67, and a magnet 68. 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 section 4.

The reflective mirror 62 is connected to the shaft 66 via the support 61. The shaft 66 is held at the base 65 so that it can rotate about 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 in and removed from the optical path. At this time, the amount of change of the inclination angle is limited by the rotation limiting section 67 (protrusion section 67a, stopper 67b) in the same manner as the target display section 4. That is, the insertion position of the reflection mirror 62 is set by the rotation restriction part 67.

Moreover, the handle 63 is connected to the reflection mirror 62, and an inspector operates the handle 63, and removes the reflection mirror 62. FIG. At the time of circular inspection, the reflection mirror 62 is maintained at the retracted position withdrawn from the optical path of the target display part 4 by the magnetic force of the magnet 68 (refer FIG. 10 (a)). In addition, 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 part 4. For this reason, the magnet 68 maintains the reflection mirror 62 at the retracted position, pressurizes the support part 41 via the projection part 46, and the inclination angle at the time of the original inspection of the display 45 (position position) ) To keep. 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 protrusion 46 is lost. Thereby, the inclination angle with respect to the reference axis L1 of the display 45 changes with the spring force of the spring 47 (refer FIG. 10 (b)). The inclination angle of the display 45 is that when the eye to be examined sees the screen of the display 45 reflected by the reflection mirror 62 in the direction of the reference axis L1, the screen (the image of the virtual image) is the reference axis L1. It is set at an angle seen as a screen perpendicular to the. Moreover, 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 retracted position.

In this embodiment, the magnet 68 is used to hold the reflective mirror 62 in the retracted position. However, the present invention is not limited thereto. What is necessary is just a structure which can hold the reflective mirror 62 in a retracted position. For example, a latch or the like may be used.

As described above, switching between the far-inspection optical path and the near-inspection light path can be easily performed. In addition, since the inclination angle of the display 45 is changed in accordance with the switching of the optical path, even when the optical path is switched, the target in which the distortion is reduced can be projected onto the subject. Thereby, the index display for performing a proper inspection can be performed with the configuration using the display for displaying the target.

The inspection by the timetable will be briefly described. The inspector instructs the forehead of the measurement unit 8 to touch the forehead of the subject. Then, the forehead is brought into contact with the forehead 82 to position the eye to be placed at a constant position. At the time of circular inspection, in the state in which the reflection mirror 62 deviates from the reference axis L1, a target is shown through the concave mirror 50 on the reference axis L1 when the eye is looking at the front, and the subject is examined. The visually appointed schedule is observed through the inspection window 81 of the measuring unit 8, and the visual function is examined. The control unit 70 controls the display of the display 45 on the basis of the selection signal of the round target input by the controller 90, and causes the round target to be displayed on the display 45.

At the time of near-inspection, as described above, the reflection mirror 62 is inserted into the reference axis L1 and the angle of the display 45 is changed. The control unit 70 controls the display of the display 45 on the basis of the selection signal of the near target input 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 this embodiment, although the handle 63 was formed and it was set as the structure which switches the optical path manually, it is not limited to this. For example, the drive mechanism of the reflective mirror 62 may be controlled to switch the optical path by providing a drive mechanism for inserting and removing the reflective mirror 62 and switching the mode of far inspection or near inspection. .

In the present embodiment, the display 45 is placed near the forehead of the examinee (near the forehead 82 of the measuring unit 8), and the removal and reflection inspection of the far-end inspection is performed by removing the reflective mirror 62. Although the optical path of a dragon was made into the structure, it is not limited to this. For example, as shown in FIG. 11, the reflection mirror 123 for changing an optical path is arrange | positioned near the forehead of a subject, and the display 120 which displays a target on the concave mirror 50 side is arrange | positioned. You may comprise the optical path for round inspection. The arrangement conditions of the reflection mirror 123 are the same as the example of the display 45 shown in FIG.

In the case of the apparatus of such a structure, it is good also as a structure which switches a light path by removing the display 120. FIG. In this case, at the time of circular inspection, the target light 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 the concave mirror 50. Headed to. The target light beam reflected by the concave mirror 50 passes through the transparent panel 52 again and is guided to the eye to be positioned in the direction of the reference axis L1. Incidentally, the inclination angle of the transparent panel 52 is a condition as described above.

In the case of near-inspection, 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, and 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 by the inclination angle changing means (not shown) to the inclination angle for near inspection. The inclination angle for the muscle inspection is an angle at which the screen of the display 120 is perpendicular to the reference axis L1. This switches the light path. Moreover, the inclination angle of the display 120 at the time of circular inspection is so that the screen (image of a virtual image) of the display 120 observed in the direction of the reference axis L1 may be located in a state perpendicular to the reference axis L1. It is set in accordance with the inclination of the reflection mirror 123 and the concave mirror 50.

In addition, as another modification of the present embodiment, the reflection mirror 62 shown in Fig. 9B can be moved along the reference axis L1, whereby the inspection distance can be continuously changed from short distance to medium distance. For example, by moving the reflection mirror 62 along the reference axis and changing the inclination angle of the display 45 to the inclination angle corresponding to each position after the movement of the reflection mirror 62, only the circular inspection and the near inspection. In addition, inspection for medium distances is possible.

In addition, in this embodiment, although the structure which reduces the distortion of the target projected on the to-be-tested object by changing the inclination-angle of the display 45 is not limited to this. It is good also as a structure which reduces distortion by image processing. For example, it displays in consideration of the distortion of the shape of the target shown on the display 45. FIG. That is, the generation amount of distortion corresponding to each optical path is calculated in advance, and the indication displayed in consideration of the generation amount is stored. In this way, the target in which the distortion was reduced is projected into the examination.

In addition, in this embodiment, although the reflective mirror 62 which is a plane mirror was used as an optical path switching member, it is not limited to this. The optical path switching member may be a reflective member. For example, a concave mirror, a convex mirror, etc. are mentioned. When the convex mirror is used, the optical path is shortened, so that the concave mirror 50 may be inserted immediately before the concave mirror 50 in order to set a distance (for example, 40 cm) for inspection.

In the above configuration, the incident angle of the target beam to the concave mirror 50 and the reflection angle when reflecting from the concave mirror 50 may be further adjusted in accordance with the curved shape (magnification) of the concave mirror 50. By changing the magnification of the concave mirror 50, the incident angle and the reflection angle at which distortion occurs also change. For example, when using a concave mirror having a magnification higher than that of the concave mirror of this embodiment, it is necessary to adjust so that the incident angle and the reflection angle are acute.

In addition, the concave mirror 50 is not limited to a spherical surface. For example, it is good also as a structure which uses an aspherical mirror, a free curved mirror, etc.

2: Optometry table unit
3: target time unit
4:
5: case body
6: exterior cover
8: Uniaxial refractive power measurement unit
10: holding unit
20: Support arm
45: Display
50: concave mirror
51: protection panel
52: Transparent panel
53:
60: Optical path switching unit
62: reflection mirror
70:
72: memory
81: Inspection Window
90: Controller

Claims (10)

A case body accommodating therein a concave mirror disposed on a reference axis set in order to view an eyepiece to be examined in the front direction;
A display for displaying the target, comprising: a display disposed outside the reference axis outside the case;
A transparent panel disposed on the front surface of the case body on the reference axis, the transparent panel which transmits the target light flux from the display, and transmits the target light flux reflected by the concave mirror again and exits the case body; An optometry device comprising:
The normal direction of the front surface of the transparent panel is disposed at an inclined angle with respect to the reference axis,
The angle is reflected light reflected from the front surface of the transparent panel, and the optometry apparatus is set so that the reflected light of the light emitted from the display faces a direction deviating from the eye to be examined at a predetermined position. The method of claim 1,
The case body has a shielding member disposed around the transparent panel at the front side of the concave mirror, and the transparent panel surrounded by the shielding member is a sight window for the eye to be examined to observe the target inside the case body. An optometry device comprising: The method of claim 1,
It is further provided with an eye refractive index measurement unit having a pair of left and right lens chamber units for switching and placing the optical element in the inspection window,
The eye refractive index measuring unit is disposed so that the inspection window is located at the height position of the reference axis. The method of claim 3, wherein
Support means for supporting the eye refractive index measurement unit so as to be movable between the inspection position and the retracted position in front of the eye of the eye to be examined, characterized in that it comprises the support means formed on the visual display unit having the case body and the display Optometry device. 5. The method of claim 4,
Optometry table,
Holding means for holding the target device on the optometry table;
And the support means is provided in the target display unit via the holding means. The method of claim 5, wherein
The holding means includes a first holding member for holding the case body at a position separated by a predetermined distance from the eye refractive index measuring unit placed at the inspection position, and a second holding member extending from the first holding member. In order to hold | maintain, the said 2nd holding member extended from the upper side of the said case body to the said examinee side,
The optometry device, wherein the support means is connected to the second holding member. The method according to claim 6,
The supporting means is a vertical movement means attached to the second holding member, and includes an vertical movement means for moving the eye refractive index measurement unit to a retracted position above the inspection position. The method of claim 3, wherein
And the display is arranged outside a predetermined viewing angle range when the eye is looked into the inspection window. The method of claim 8,
The case body is a case body having a viewing window disposed on the front surface of the concave mirror, and is disposed in the front direction of the eye refractive index measurement unit,
The display is arranged at a position to direct the target beam from the display toward the concave mirror from the outside of the case body via the viewing window. The method of claim 9,
And the display is disposed around the refractive index measuring unit, and emits the target beam from the eye side toward the concave mirror.

Images