JP6926494B2 - Subjective optometry device - Google Patents

Description

The present disclosure relates to a subjective optometry device for subjectively measuring the optical characteristics of an eye to be inspected.

Using an optical power measuring unit placed in front of the subject's eye, optical elements such as a spherical lens and a pillar surface (astigmatism) lens are placed in the inspection window of the optical power measuring unit, and the placed optical elements are used. There is known a subjective optometry device that inspects (measures) the refractive power of the optometry to be inspected by presenting an optotype to the optometry to be inspected (see Patent Document 1).

By the way, when the eye refractive power measuring unit is used in the subjective eye examination device, the eye refractive power measuring unit and the eye to be inspected are aligned in order for the subject to confirm the optotype through the examination window. Conventionally, for example, as for the alignment between the optical power measurement unit and the eye to be inspected, the alignment of the reference position when the lens is worn and the apex of the cornea in the eye E to be inspected (adjustment of the distance VD (Vertex Distance) between the apex of the cornea). ) Is being performed.

Japanese Unexamined Patent Publication No. 5-176893

Conventionally, the examiner adjusts the distance VD between the corneal vertices by observing the side surfaces of the left and right eyes to be inspected by using the confirmation window provided in the optical power measurement unit. The eye to be inspected is illuminated from the side by a light source so that the position of the apex of the cornea can be easily seen. At this time, if the subject moves, the light from the light source that illuminates the subject on the side opposite to the subject being observed by the examiner enters the confirmation window that the examiner is looking into. For this reason, the examiner felt glare while adjusting the distance VD between the corneal vertices, and it was difficult to perform accurate alignment. In addition, feeling glare was a burden on the examiner.

In view of the above-mentioned prior art, it is a technical subject of the present disclosure to provide a subjective optometry apparatus capable of easily and accurately performing a subjective examination.

In order to solve the above problems, the present disclosure is characterized by having the following configurations.
(1) The subjective eye examination device according to the first aspect of the present disclosure is a subjective eye examination device that subjectively measures the optical characteristics of the eye to be inspected, and illuminates one of the left and right eyes to be inspected. The first light source, the second light source that illuminates the other eye to be inspected among the left and right eyes to be inspected, the first confirmation window, and the reflected light emitted from the first light source and reflected by the one eye to be inspected. The distance between the apex of the corneal apex of the one eye to be inspected and the reference position for wearing the lens, which has a first corneal position aiming optical system that guides the light to the first confirmation window, and is illuminated by the first light source. The first corneal position aiming unit for confirmation, the second confirmation window, and the second cortex that guides the reflected light emitted from the second light source and reflected by the other eye to be inspected to the second confirmation window. A second corneal position aiming unit having a position aiming optical system and for confirming the distance between the apex of the corneal apex of the other eye to be inspected and the reference position for wearing a lens illuminated by the second light source, and the above. While suppressing the light from the second light source from being emitted from the first confirmation window through the first corneal position aiming optical system, the light from the first light source causes the second corneal position aiming optical system. A suppression unit that suppresses irradiation from the second confirmation window via the second confirmation window is provided , and the suppression unit includes the first optical member arranged in the first corneal position aiming unit and the second corneal position. It has the second optical member arranged in the aiming unit, and the first optical member transmits light by the first light source, suppresses the transmission of light by the second light source, and suppresses the transmission of light by the second light source, and the second optical member. The member is characterized in that light transmitted by the second light source is transmitted and transmission of light by the first light source is suppressed .

It is an external view of the subjective optometry apparatus which concerns on this Example. It is external drawing which shows the ocular refractive power measurement unit which concerns on this Example from the front. It is external drawing which shows the ocular refractive power measurement unit which concerns on this Example from the rear surface. It is a figure which shows the corneal position aiming unit. It is a block diagram of the aiming scale plate and the reticle plate. It is a figure explaining the arrangement of the 1st polarization member and the 2nd polarization member. It is a figure explaining the polarization axis which the 1st polarization member and the 2nd polarization member have. It is a schematic block diagram of the control system in a subjective optometry apparatus. It is a figure which shows the aiming scale plate and the reticle plate at the time of confirming the position of the corneal apex. It is a figure which shows the transformation example of the arrangement position of a light source. It is the schematic explaining the structure of the detection unit. It is a figure for demonstrating the operation unit. It is a figure for demonstrating the corneal position aiming unit provided with the light guide part.

<Overview>
Hereinafter, one of the typical embodiments will be described with reference to the drawings. 1 to 13 are views for explaining the subjective optometry apparatus according to the present embodiment. The items classified by <> below can be used independently or in relation to each other. In the following description, the depth direction of the subjective eye examination device (the front-back direction of the subject when measuring the subject) is perpendicular to the Z direction and the depth direction (the subject when measuring the subject). The horizontal direction on the plane (the left-right direction of the person) will be described as the X direction, and the vertical direction (the vertical direction of the subject when measuring the subject) will be described as the Y direction. It should be noted that L and R attached to the reference numerals indicate those for the left eye and those for the right eye, respectively.

For example, the subjective optometry device (for example, the subjective optometry device 1) in the present embodiment includes a first light source (for example, a first light source 40a), a second light source (for example, a second light source 40b), and a first cornea. It includes a position aiming unit (for example, a first corneal position aiming unit 10a), a second cornea position aiming unit (for example, a second cornea position aiming unit 10b), and a suppression unit (for example, a suppression unit 30). For example, a subjective optometry device subjectively measures the optical characteristics of an eye to be inspected. The first corneal position aiming unit and the second corneal position aiming unit may have the same member, or at least a part thereof may be different.

For example, the first light source illuminates one of the left and right eyes to be inspected. For example, the second light source illuminates the other eye to be inspected among the left and right eyes to be inspected. For example, various light sources can be used as the first light source. For example, as the first light source, at least one of an LED (Light emitting diode), a halogen lamp, a fluorescent lamp and the like may be used. For example, various light sources can be used as the second light source. For example, as the second light source, at least one of an LED, a halogen lamp, a fluorescent lamp and the like may be used. The first light source and the second light source may be configured to include a light source portion that emits light and a lens system that is integrally or separately arranged with the light source portion. Of course, the first light source and the second light source may have a configuration that does not include a lens system.

For example, the first corneal position aiming unit is used to confirm the distance between the apex of the cornea of one eye to be inspected illuminated by the first light source and the reference position for wearing the lens. For example, the first corneal position aiming unit has a first confirmation window (for example, the first confirmation window 11a) and a first corneal position aiming optical system (for example, the first corneal position aiming optical system 20a). You may.

For example, the first confirmation window may be formed of a transparent panel. For example, as the material of the first confirmation window, a transparent member such as an acrylic resin or a glass plate may be used. Of course, for example, the first confirmation window may be a member capable of confirming the first corneal position aiming optical system through the first confirmation window. For example, it may be a substantially transparent member. For example, the first confirmation window may be arranged outside or inside the optical power measuring unit (for example, the optical power measuring unit 50).

The optical power measuring unit may be an optometry unit (folopter) in which optical elements arranged in front of the eye to be inspected are switched and arranged. For example, the optical power measuring unit has a lens disk in which a plurality of optical elements are arranged on the same circumference and a driving means for rotating the lens disk, and drives the driving means (for example, a motor). The optical element may be electrically switched according to the above.

For example, the first corneal position aiming optical system guides the reflected light emitted from the first light source and reflected by one of the eyes to be inspected to the first confirmation window. For example, the first corneal position aiming optical system includes at least one or more members. For example, in the first corneal position aiming optical system, at least a part of the members of the first corneal position aiming optical system may be arranged outside or inside the optical power measuring unit.

For example, the first corneal position aiming unit is a first observation window (for example, a first observation window) that guides the reflected light emitted from the first light source and reflected by one of the eyes to be examined to the first corneal position aiming optical system. An observation window 12a) may be provided. For example, the first observation window may be used to guide the reflected light reflected by the eye to be inspected to the first corneal position aiming optical system.

For example, the second corneal position aiming unit is used to confirm the distance between the apex of the cornea of the other eye to be inspected illuminated by the second light source and the reference position for wearing the lens. For example, the second corneal position aiming unit has a second confirmation window (for example, a second confirmation window 11b) and a second corneal position aiming optical system (for example, a second corneal position aiming optical system 20b). You may.

For example, the second confirmation window may be formed of a transparent panel. For example, as the material of the second confirmation window, a transparent member such as an acrylic resin or a glass plate may be used. Of course, for example, the first confirmation window may be a member capable of confirming the second corneal position aiming optical system through the second confirmation window. For example, it may be a substantially transparent member. For example, the second confirmation window may be arranged outside or inside the optical power measuring unit.

For example, the second corneal position aiming optical system guides the reflected light emitted from the second light source and reflected by the other eye to be inspected to the second confirmation window. For example, the second corneal position aiming optical system includes at least one or more members. For example, in the second corneal position aiming optical system, at least a part of the members of the second corneal position aiming optical system may be arranged outside or inside the optical power measuring unit.

The second corneal position aiming unit is a second observation window (for example, a second observation window) that guides the reflected light emitted from the second light source and reflected by the other eye to be inspected to the second corneal position aiming optical system. 12b) may be provided. For example, the second observation window may be used to guide the reflected light reflected by the eye to be inspected to the second corneal position aiming optical system.

For example, the suppression unit suppresses the light from the second light source from being emitted from the first confirmation window via the first corneal position aiming optical system, and the light from the first light source is suppressed from the second corneal position aiming optical system. It suppresses irradiation from the second confirmation window through the system.

For example, the subjective eye examination device according to the present embodiment includes a first light source that illuminates one of the left and right eyes to be inspected, and a second light source that illuminates the other eye to be inspected among the left and right eyes to be inspected. , Equipped with. Further, for example, the subjective optometry apparatus according to the present embodiment suppresses the light from the second light source from being emitted from the first confirmation window via the first corneal position aiming optical system, and also suppresses the light from the first light source. It is provided with a suppression unit that suppresses light from being emitted from the second confirmation window via the second optometry position aiming optical system. Therefore, the luminous flux emitted from the first light source and the second light source is suppressed by the suppression unit when it enters the examiner's eye via the corneal position aiming optical system. That is, the luminous flux emitted from the first light source and the second light source is dimmed by passing through the suppression unit and then incident on the eye to be inspected. Therefore, the examiner can suppress the feeling of glare when observing the eye to be inspected from the first confirmation window or the second confirmation window, and the eye refractive power measurement unit and the eye to be inspected can be accurately aligned. can.

For example, the suppression unit may include a first optical member arranged in the first corneal position aiming unit and a second optical member arranged in the second corneal position aiming unit. In this case, for example, the first optical member may transmit the light by the first light source and suppress the transmission of the light by the second light source. Further, in this case, for example, the second optical member may transmit the light by the second light source and suppress the transmission of the light by the first light source.

For example, as the first optical member, a first polarizing member (for example, a first polarizing member 30a), a first transmitting member that transmits a luminous flux of a specific wavelength, a first shielding member that shields a luminous flux of a specific wavelength, and the like. It may be. For example, the first polarizing member may include at least one of a linearly polarizing member and a circularly polarizing member. For example, a case where a linearly polarized light member is used as the first polarizing member will be described as an example. In addition, for example, as the first optical member, at least one or more optical members may be used.

For example, even if the first optical member is arranged in the optical path where the light of the first light source is emitted toward the second corneal position aiming unit and is arranged in the optical path of the first corneal position aiming unit. good. As an example, when a first polarizing member is used as the first optical member, the first polarizing member is arranged in an optical path in which the light of the first light source is emitted toward the second corneal position aiming unit. , May be located in the optical path of the first corneal position aiming unit.

For example, as an example of being arranged in the above optical path, the first optical member may be arranged in the vicinity of the first light source. Further, for example, as an example of being arranged in the above optical path, the first optical member may be arranged at any position in the optical path of the first corneal position aiming unit. In this case, for example, as a configuration in which the first corneal position aiming unit is arranged in the optical path, the first optical member may be arranged in the vicinity of the first observation window. Further, in this case, for example, as a configuration in which the first corneal position aiming unit is arranged in the optical path, the first optical member may be arranged in the vicinity of the first confirmation window. Further, in this case, for example, as a configuration in which the first optical member is arranged in the optical path of the first corneal position aiming unit, the first optical member is arranged at any position in the optical path of the first corneal position aiming optical system. There may be.

As an example, when a first polarizing member is used as the first optical member, the first polarizing member may be arranged in the vicinity of the first light source and in the vicinity of the first observation window. ..

For example, as the second optical member, a second polarizing member (for example, a second polarizing member 30b), a second transmitting member that transmits a luminous flux of a specific wavelength, a second shielding member that shields a luminous flux of a specific wavelength, and the like. It may be. For example, the second polarizing member may include at least one of a linearly polarizing member and a circularly polarizing member. For example, a case where a linearly polarized light member is used as the second polarizing member will be described as an example. In addition, for example, as the second optical member, at least one or more optical members may be used.

For example, even if the second optical member is arranged in the optical path where the light of the second light source is emitted toward the first corneal position aiming unit and is arranged in the optical path of the second corneal position aiming unit. good. As an example, when a second polarizing member is used as the second optical member, the second polarizing member is arranged in an optical path in which the light of the second light source is emitted toward the first corneal position aiming unit. , May be located in the optical path of the second corneal position aiming unit.

For example, as an example of being arranged in the above optical path, the second optical member may be arranged in the vicinity of the second light source. Further, for example, as an example of being arranged in the above optical path, the second optical member may be arranged at any position in the optical path of the second corneal position aiming unit. In this case, for example, as a configuration in which the second corneal position aiming unit is arranged in the optical path, the second optical member may be arranged in the vicinity of the second observation window. Further, in this case, for example, as a configuration in which the second corneal position aiming unit is arranged in the optical path, the second optical member may be arranged in the vicinity of the second confirmation window. Further, in this case, for example, as a configuration in which the second optical member is arranged in the optical path of the second corneal position aiming unit, the second optical member is arranged at any position in the optical path of the second corneal position aiming optical system. There may be.

As an example, when a second polarizing member is used as the second optical member, the second polarizing member may be arranged in the vicinity of the second light source and in the vicinity of the second observation window. ..

For example, when a polarizing member is used as the first optical member and the second optical member, the polarizing axis of the first polarizing member (for example, the polarizing axis Sa) and the polarizing axis of the second polarizing member (for example, the polarizing axis Sb) are used. ) And the second polarizing member may be arranged so as to be orthogonal to each other. That is, the first polarizing member includes the first linear polarizing member, the second polarizing member includes the second linear polarizing member, and the polarization axis of the first linear polarization member and the polarization axis of the second linear polarization member are The first polarizing member and the second polarizing member may be arranged so as to be orthogonal to each other. In the present disclosure, orthogonality includes substantially orthogonality. The configuration when the polarizing member is used as the first optical member and the second optical member is not limited to the configuration in which the polarizing axis of the first polarizing member and the polarizing axis of the second polarizing member are arranged so as to be orthogonal to each other. .. For example, if the polarization axes of the first polarizing member and the polarization axes of the second polarizing member are arranged in an angular relationship that can suppress the transmission of the light flux from the first light source and the second light source to the extent that glare is not felt. good. For example, the polarization axis of the first polarizing member and the polarization axis of the second polarizing member may be arranged so as to cause a deviation of 30 degrees, 45 degrees, 60 degrees, or the like.

For example, the suppression unit is not limited to a configuration including an optical member. For example, the suppression unit includes a forehead pad (for example, forehead pad 51) that fixes the position of the subject's face and a detection unit that detects whether or not the subject's face is in contact with the forehead pad (for example, forehead pad 51). It may be configured to include a detection unit 80). In this case, for example, the suppression unit turns off the first light source and the second light source while the subject's face is not in contact with the forehead pad, based on the detection result of the detection unit, and the subject's face. The first light source and the second light source may be controlled to be turned on while the face is in contact with the forehead pad. In the present disclosure, the extinguishing includes a slightly lit state.

For example, the optometry device includes a forehead pad that fixes the position of the subject's face and a detection unit that detects whether or not the subject's face is in contact with the forehead pad. Further, the suppression unit controls the lighting of the first light source and the second light source based on the detection result of the detection unit. As a result, the first light source and the second light source are turned off while the subject's face is not in contact with the forehead pad, and the first light source is turned off while the subject's face is in contact with the forehead pad. And the second light source is turned on. The examiner can easily turn on and off the first light source or the second light source even if the distance between the subject's face and the forehead pad changes, and the side opposite to the eye to be observed. The position of the corneal apex of the eye to be inspected can be confirmed without worrying about the glare of the light source that irradiates the eye to be inspected.

Further, for example, the suppression unit may be configured to include an operation unit (for example, an operation unit 90). In this case, for example, the operating unit is used to select lighting and extinguishing of the first light source and the second light source. For example, the suppression unit may individually control the on / off of the first light source and the on / off of the second light source based on the operation signal from the operation unit. For example, the operation unit may be configured to be arranged in the eye refractive power measuring unit 50. Further, for example, the operation unit may be configured to be provided separately from the eye refractive power measurement unit 50. In this case, for example, the configuration may be provided in the controller 71.

For example, a subjective optometry device includes an operating unit for selecting lighting and extinguishing of a first light source and a second light source. Further, the on / off of the first light source and the on / off of the second light source are individually controlled based on the operation signal from the operation unit. Therefore, the examiner can turn off the light source that illuminates the eye to be inspected on the side not to be observed and turn on only the eye to be inspected on the side to be observed. Therefore, the examiner can confirm the position of the corneal apex of the eye to be inspected without worrying about the glare of the light source that irradiates the eye to be inspected on the side opposite to the eye to be inspected.

<Example>
Hereinafter, the subjective optometry device in this embodiment will be described. FIG. 1 is a perspective view showing the entire optometry device 1 from the front side. For example, in this embodiment, the side where the eye to be inspected E is located will be described as the front surface of the entire optometry device, and the side where the optometry examiner's eye OE is located will be described as the back surface of the entire optometry device.

For example, the subjective optometry device 1 includes a support arm 2, an optometry table 3, a controller 71, an optical power measuring unit 50, and the like. For example, the eye E to be inspected observes an inspection target from the front surface of the optical power measuring unit 50 through an inspection window 53 described later. For example, the examiner's eye OE observes the front surface of the eye E to be inspected from the rear surface of the optical power measuring unit 50 through an examination window 53 described later. Further, for example, the examiner's eye OE observes the side of the eye to be inspected E from the rear surface of the optical power measuring unit 50 through a confirmation window 11 described later.

<Eye refractive power measurement unit>
Hereinafter, the optical power measuring unit 50 will be described. FIG. 2 is a schematic external view showing the optical power measuring unit 50 according to the present embodiment from the front surface (eye E side to be inspected). FIG. 3 is a schematic external view showing the optical power measuring unit 50 according to the present embodiment from the rear surface (the OE side of the examiner's eye). For example, the eye refractive power measuring unit 50 includes a forehead rest 51, a connecting portion 52, a forehead rest adjusting knob 5, an inspection window 53, a moving unit 54, a pair of left and right lens chamber units 55, and the like.

For example, the forehead pad 51 fixes the position of the subject's face by contacting the subject's forehead. Therefore, the eye E to be inspected is kept at a constant distance from the inspection window 53. For example, one end of the connecting portion 52 is connected to the forehead pad 51, and the other end is connected to the moving unit 54. For example, the forehead pad adjustment knob 5 is used to adjust the position of the forehead pad 51.

For example, the moving unit 54 includes a drive unit 58, a drive unit 59, and the like. For example, the drive unit 58 has a slide mechanism and adjusts the distance between the lens chamber units 55. Thereby, the examiner can change the interval of the examination window 53 according to the interpupillary distance of the eye E to be inspected. Further, for example, the drive unit 59 has a convergence mechanism and adjusts the convergence angle (striking angle) of the lens chamber unit 55. For the detailed configuration of the mobile unit, refer to Japanese Patent Application Laid-Open No. 2004-329345.

For example, the lens chamber unit 55 includes a light source 40, a lens disk 45, a drive unit 56, a drive unit 57, a corneal position aiming unit 10, a suppression unit 30, and the like. For example, an LED (Light emitting diode) or the like is used as the light source 40. For example, the light source 40 includes a first light source 40a that illuminates one of the left and right eyes to be inspected, and a second light source 40b that illuminates the other eye to be inspected among the left and right eyes to be inspected (FIG. FIG. 2 and FIG. 4). For example, in this embodiment, the first light source 40a is arranged in the left eye lens chamber unit 55L to illuminate the left eye subject EL, and the second light source 40b is arranged in the right eye lens chamber unit 55R to cover the right eye. An example is a configuration in which the optometry ER is illuminated.

For example, in the lens disk 45, a large number of optical elements 46 (spherical lens, cylindrical lens, dispersion prism, etc.) are arranged on the same circumference. For example, the drive unit 56 (actuator, stepping motor, etc.) controls the rotation of the lens disk 45. As a result, the optical element 46 desired by the examiner is switched and arranged in the inspection window 53. For example, the drive unit 57 (motor, solenoid, stepping motor, etc.) controls the rotation of the optical element 46 arranged in the inspection window 53. As a result, the optical elements 46 are arranged in the left and right inspection windows 53 at a rotation angle desired by the examiner.

For example, the lens disc 45 is composed of one lens disc or a plurality of lens discs. For example, when a plurality of lens discs (lens disc group) are provided, a drive unit corresponding to each lens disc is provided. For example, each lens disc in the lens disc group comprises an aperture (or a 0D lens) and a plurality of optical elements. Typical types of each lens disc are a spherical lens disc having a plurality of spherical lenses having different powers, a cylindrical lens disc having a plurality of cylindrical lenses having different powers, and an auxiliary lens disc. For example, at least one of a red filter / green filter, a prism, a cross cylinder lens, a polarizing plate, a Madox lens, and an auto cross cylinder lens is arranged on the auxiliary lens disc. For the detailed configuration of the lens disc, refer to JP-A-2007-68574 and JP-A-2011-72431.

<Corneal position aiming unit>
Hereinafter, the corneal position aiming unit 10 will be described. FIG. 4 is a diagram showing the corneal position aiming unit 10. For example, the corneal position aiming unit 10 includes a first corneal position aiming unit 10a and a second corneal position aiming unit 10b. For example, in this embodiment, the configuration in which the left eye lens chamber unit 55L has the first corneal position aiming unit 10a and the right eye lens chamber unit 55R has the second corneal position aiming unit 10b will be given as an example.

For example, the first corneal position aiming unit 10a includes a corneal apex of one eye to be inspected (for example, the left eye to be inspected EL in this embodiment) illuminated by the first light source 40a, and a lens wearing reference position (described later). Used to check the distance between the vertices of. For example, the first corneal position aiming unit 10a includes a first confirmation window 11a, a first observation window 12a, and a first corneal position aiming optical system 20a. For example, the first confirmation window 11a is used to confirm the first corneal position aiming optical system 20a arranged inside the optical power measuring unit 50 from the outside of the optical power measuring unit 50. For example, in the first observation window 12a, the reflected light emitted from the first light source 40a and reflected by one eye to be inspected (for example, the left eye to be inspected EL) is arranged inside the optical power measuring unit 50. 1 Used to guide light to the optometry position aiming optical system 20a.

For example, the first corneal position aiming optical system 20a guides the reflected light emitted from the first light source 40a and reflected by one eye to be inspected (for example, the left eye to be inspected EL) to the first confirmation window 11a. do. For example, the first corneal position aiming optical system 20a includes a reflection mirror 22, an aiming scale plate 23, a reticle plate 24, and the like. For example, the reflection mirror 22 is arranged in the lateral direction (X direction) of the left eye subject EL. For example, the aiming scale plate 23 is provided between the reflection mirror 22 and the first confirmation window 11a. The aiming scale plate 23 may be provided between the left eye subject EL and the reflection mirror 22. For example, the reticle plate 24 is arranged on the back side (inside of the left eye lens chamber unit 55L) of the first confirmation window 11a.

For example, FIG. 5 is a configuration diagram of the aiming scale plate 23 and the reticle plate 24. FIG. 5A shows the aiming scale plate 23, and FIG. 5B shows the reticle plate 24. For example, the aiming scale plate 23 is provided with several scale lines S1 to S5, a center line S6, and a first index 27. For example, the scale lines S1 to S5 correspond to the corneal apex distance VD (see FIG. 4) = 12 mm, 13.75 mm, 16 mm, 18 mm, and 20 mm in order. For example, the scale line S2 (13.75 mm) serves as a reference position when the lens is worn, and is drawn so as to be distinguishable from other scale lines. For example, the center line S6 is used as a reference for aligning the reticle 28 on the reticle plate 24. Further, for example, the center line S6 is located at the center on the left and right of the aiming scale plate 23. For example, the reticle plate 24 is provided with a reticle 28, a second index 29, and the like. For example, the reticle 28 is formed in a triangular shape. The reticle 28 is located at the center of the left and right sides of the reticle plate 24. For example, a numerical value 25 indicating VD is displayed on the outer peripheral portion of the reticle plate 24.

For example, the first index 27 on the aiming scale plate 23 and the second index 29 on the reticle plate 24 are indexes for guiding the examiner's eye OE to a predetermined distance with respect to the reticle plate 24. For example, in this embodiment, when the examiner's eye OE is located 250 mm away from the reticle plate 24, the first index 27 and the second index 29 appear to overlap. For example, when the first index 27 is located inside the second index 29, the examiner's eye OE is located closer than 250 mm to the reticle plate 24. On the contrary, when the first index 27 is located outside the second index 29, the examiner's eye OE is located farther than 250 mm with respect to the reticle plate 24. For the detailed configuration of the aiming scale plate and the reticle plate and their positional relationship, refer to Japanese Patent Application Laid-Open No. 2004-229769.

For example, the second corneal position aiming unit 10b is located between the apex of the cornea of the other eye to be inspected (for example, the right eye to be inspected ER in this embodiment) illuminated by the second light source 40b and the lens wearing reference position. Used to check the distance. For example, the second corneal position aiming unit 10b includes a second confirmation window 11b, a second observation window 12b, and a second corneal position aiming optical system 20b. For example, the second confirmation window 11b is used to confirm the second corneal position aiming optical system 20b arranged inside the optical power measuring unit 50 from the outside of the optical power measuring unit 50. Further, for example, the second observation window 12b is irradiated with the second light source 40b, and the reflected light reflected by one eye to be inspected (for example, the left eye to be inspected EL) is arranged inside the optical power measuring unit 50. It is used to guide the light to the second corneal position aiming optical system 20b.

For example, the second corneal position aiming optical system 20b guides the reflected light emitted from the second light source 40b and reflected by the other eye to be inspected (for example, the right eye to be inspected ER) to the second confirmation window 11b. do. Since the configuration of the second corneal position aiming optical system 20b is the same as the configuration of the first corneal position aiming optical system 20a, the description thereof will be omitted in this embodiment. Of course, some of the configurations of these corneal position aiming optical systems may be different.

<Suppression unit>
Hereinafter, the suppression unit 30 will be described. For example, the suppression unit 30 suppresses the light from the second light source 40b from being emitted from the first confirmation window 11a via the first corneal position aiming optical system 20a. Further, for example, the suppression unit 30 suppresses the light from the first light source 40a from being emitted from the second confirmation window 11b via the second corneal position aiming optical system 20b. For example, in this embodiment, a configuration in which an optical member is used as the suppression unit 30 will be described as an example.

For example, the suppression unit 30 includes a first optical member arranged in the first corneal position aiming unit 10a and a second optical member arranged in the second corneal position aiming unit 10b. For example, the first optical member transmits light from the first light source 40a and suppresses light transmission by the second light source 40b. Further, for example, the second optical member transmits light by the second light source 40b and suppresses the transmission of light by the first light source 40a. For example, as such an optical member, a polarizing member (for example, a polarizing plate, a polarizing sheet, a polarizing film, etc.) can be used. Therefore, in the following, the first optical member will be referred to as a first polarizing member 30a, and the second optical member will be referred to as a second polarizing member 30b.

FIG. 6 is a diagram illustrating the arrangement of the first polarizing member 30a and the second polarizing member 30b. In this embodiment, a case where a linearly polarizing member is used as the first polarizing member 30a and the second polarizing member 30b will be described as an example. For example, in this embodiment, the first observation window 12a included in the first corneal position aiming unit 10a also serves as the first polarizing member 30a. Therefore, in the following description, the first observation window 12a will be referred to as the first polarizing member 30a. Further, for example, in this embodiment, the second observation window 12b provided in the second corneal position aiming unit 10b also serves as the second polarizing member 30b. Therefore, in the following description, the second observation window 12b will be referred to as the second polarizing member 30b.

For example, the first polarizing member 30a is located in the vicinity of the first light source 40a. For example, the term “neighborhood” in this embodiment represents a state in which the first polarizing member 30a is located around the first light source 40a. For example, the first polarizing member 30a is arranged in the optical path L2a in which the light flux of the first light source 40a is irradiated toward the second corneal position aiming unit 10b. Further, for example, the first polarizing member 30a is arranged in the optical path L3a that is irradiated toward the first corneal position aiming unit 10a after the light flux of the first light source 40a is reflected by the left eye subject EL. Therefore, the first polarizing member 30a is arranged closer to the first corneal position aiming unit 10a than the arrangement position of the second polarizing member 30b. The optical path irradiated with the luminous flux of the first light source 40a will be described in detail later.

Similarly, for example, the second polarizing member 30b is located in the vicinity of the second light source 40b. For example, the term “neighborhood” in this embodiment represents a state in which the second polarizing member 30b is located around the second light source 40b. For example, the second polarizing member 30b is arranged in the optical path L2b where the light flux of the second light source 40b is irradiated toward the first corneal position aiming unit 10a. Further, for example, the second polarizing member 30b is arranged in the optical path L3b that is irradiated toward the second corneal position aiming unit 10b after the light flux of the second light source 40b is reflected by the right eye subject ER. Therefore, the second polarizing member 30b is arranged closer to the second corneal position aiming unit 10b than the arrangement position of the first polarizing member 30a. The optical path irradiated with the luminous flux of the second light source 40b will be described in detail later together with the optical path irradiated with the luminous flux of the first light source 40a.

For example, the first polarizing member 30a and the second polarizing member 30b are arranged so that the polarization axis Sa of the first polarization member 30a and the polarization axis Sb of the second polarization member 30b are orthogonal to each other. Of course, the arrangement of the first polarizing member 30a and the second polarizing member 30b may include a state in which the respective polarization axes Sa and Sb are substantially orthogonal to each other. The relationship between the polarizing member and the polarizing axis will be described in detail below.

For example, the light fluxes from the first light source 40a and the second light source 40b oscillate in all directions (for example, horizontal direction, vertical direction, oblique direction, etc.) with respect to the traveling direction. For example, by using a polarizing member, a luminous flux vibrating in a specific direction can be extracted from a luminous flux vibrating in all directions. In other words, among the luminous fluxes oscillating in all directions, the luminous flux oscillating in a specific direction can pass through the polarizing member.

FIG. 7 is a diagram for explaining the polarization axes Sa and Sb included in the first polarizing member 30a and the second polarizing member 30b. FIG. 7A shows a state in which the light flux from the first light source 40a has passed through the first polarizing member 30a. FIG. 7B shows a state in which the light flux from the second light source 40b has passed through the second polarizing member 30b. For example, in this embodiment, a case where the first polarizing member 30a has a polarization axis Sa in the 90-degree direction and the second polarization member 30b has a polarization axis Sb in the 180-degree direction will be taken as an example.

For example, as shown in FIG. 7A, the luminous flux emitted from the first light source 40a in the direction of arrow A passes through the first polarizing member 30a having the polarization axis Sa in the direction of 90 degrees, so that the polarization axis Sa It becomes the same vertical luminous flux as. Therefore, linearly polarized light having a polarization axis Sa in the 90-degree direction from the first light source 40a reaches the left eye EL to be inspected.

For example, when this linearly polarized light is reflected by the left eye subject EL and returned in parallel with the incident direction, the polarization axis Sa of the first polarization member 30a and the linearly polarized light are in the same direction, so that the linearly polarized light is again applied. It transmits through the first polarizing member 30a. For example, even when linearly polarized light is returned substantially parallel to the incident direction, it can pass through the first polarized light member 30a again.

However, for example, when linearly polarized light having a polarization axis Sa in the 90-degree direction travels straight and reaches the second polarized light member 30b, the linearly polarized light incident on the second polarized light member 30b and the polarized light contained in the second polarized light member 30b. Since the axis Sb (180 degree direction) is different, the transmission of light to the second polarizing member 30b is suppressed.

Similarly, for example, as shown in FIG. 7B, the luminous flux emitted from the second light source 40b in the arrow B direction passes through the second polarizing member 30b having the polarization axis Sb in the 180 degree direction. The luminous flux is in the same horizontal direction as the polarization axis Sb. Therefore, linearly polarized light having a polarization axis Sb in the 180-degree direction reaches the right eye-tested ER from the second light source 40b.

Further, for example, when this linearly polarized light is reflected by the right eye subject ER and returned in parallel with the incident direction, the polarization axis Sb of the second polarizing member 30b and the linearly polarized light are in the same direction, so that the linearly polarized light is linearly polarized. Is transmitted through the second polarizing member 30b again. However, for example, when the linearly polarized light travels straight and reaches the first polarized light member 30a, the linearly polarized light incident on the first polarized light member 30a and the polarization axis Sa (90 degree direction) of the first polarized light member 30a are displayed. Therefore, the transmission of light to the first polarizing member 30a is suppressed.

For example, as described above, the luminous flux from the first light source 40a can pass through the first polarizing member 30a by making the polarization axes Sa and Sb of the first polarizing member 30a and the second polarizing member 30b orthogonal to each other. However, it cannot pass through the second polarizing member 30b. Further, by making the polarization axes Sa and Sb of the first polarizing member 30a and the second polarizing member 30b orthogonal to each other, the light flux from the second light source 40b can pass through the second polarizing member 30b, but the first polarization It becomes impossible to pass through the member 30a.

In this embodiment, a configuration in which the polarization axes Sa and Sb of the first polarizing member 30a and the second polarizing member 30b are orthogonal to each other has been described as an example, but the present invention is not limited to this. For example, these polarization axes do not necessarily have to be arranged orthogonally. That is, these polarization axes may be arranged at an angle that can suppress the transmission of the light flux from the first light source 40a and the second light source 40b to the extent that glare is not felt. For example, in this case, the polarization axes of the first polarizing member 30a and the second polarizing member 30b may be arranged so as to cause deviations of 30 degrees, 45 degrees, 60 degrees, and the like. With such a configuration, the light beam from the first light source 40a is not transmitted by the second polarizing member 30b, but is transmitted as a light flux dimmed by the second polarizing member 30b. Can be done. Further, in such a configuration, the light beam from the second light source 40b is transmitted as a light beam dimmed by the first polarizing member 30a, instead of being substantially suppressed by the first polarizing member 30a. can do.

<Optical axis and optical path of corneal position aiming unit>
Hereinafter, the optical axis and the optical path of the corneal position aiming unit 10 will be described (see FIGS. 4 and 6). For example, in this embodiment, the optical axis and the optical path of the first corneal position aiming unit 10a in the left eye lens chamber unit 55L will be taken as an example. The optical axis and optical path of the second corneal position aiming unit 10b in the right eye lens chamber unit 55R are the same as the optical axis and optical path of the first corneal position aiming unit 10a in the left eye lens chamber unit 55L. , The description thereof will be omitted.

For example, the first corneal position aiming unit 10a has an optical axis O1a, an optical axis O2a, an optical axis O3a, and an optical axis O4a (see FIG. 4). For example, the optical axis O1a indicates the optical axis when the light flux emitted from the first light source 40a heads toward the reflection mirror 22. Further, for example, the optical axis O2a indicates the optical axis when the light flux from the first light source 40a reflected by the reflection mirror 22 is emitted from the inside to the outside of the left eye lens chamber unit 55L. .. Further, for example, the optical axis O3a indicates the optical axis when the light flux incident from the outside of the left eye lens chamber unit 55L is directed toward the reflection mirror 22. Further, for example, the optical axis O4a is when a light beam incident from the outside of the left eye lens chamber unit 55L reflected by the reflection mirror 22 is emitted from the inside of the left eye lens chamber unit 55L toward the outside. It shows the optical axis.

Further, for example, the first corneal position aiming unit 10a has an optical path L1a, an optical path L2a, an optical path L3a, and an optical path L4a (see FIG. 6). For example, the optical axis O1a in this embodiment passes through the center of the optical path L1a. Of course, the optical axis O1a is not limited to the configuration that passes through the center of the optical path L1a. For example, the optical axis O1a may be configured to pass through the optical path L1a. Further, for example, the optical axis O2a in this embodiment passes through the center of the optical path L2a. Of course, the optical axis O2a is not limited to the configuration that passes through the center of the optical path L2a. For example, the optical axis O2a may be configured to pass through the optical path L2a. Further, for example, the optical axis O3a in this embodiment passes through the center of the optical path L3a. Of course, the optical axis O3a is not limited to the configuration that passes through the center of the optical path L3a. For example, the optical axis O3a may be configured to pass through the optical path L3a. Further, for example, the optical axis O4a in this embodiment passes through the center of the optical path L4a. Of course, the optical axis O4a is not limited to the configuration that passes through the center of the optical path L4a. For example, the optical axis O4a may be configured to pass through the optical path L4a. For example, the first confirmation window 11a, the first polarizing member 30a, the reflection mirror 22, the aiming scale plate 23, and the reticle plate 24 included in the first corneal position aiming optical system 20a are on any of these optical axes. It is arranged.

For example, the first light source 40a is arranged between the reflection mirror 22 and the aiming scale plate 23. Further, for example, the first light source 40a is arranged at the center of the top and bottom of the aiming scale plate 23 and on the side of the aiming scale plate 23. For example, the first light source 40a is arranged on the optical path L1a. For example, the light beam emitted from the first light source 40a enters the reflection mirror 22 through the optical axis O1a located at the center of the optical path L1a, and is directed toward the optical axis O2a from the reflection mirror 22 toward the second polarizing member 30b. Is reflected to. After being reflected in the direction of the optical axis O2a, this luminous flux passes through the first polarizing member 30a (first observation window 12a) and reaches the left eye subject EL.

Here, for example, the light flux reaching the left eye subject EL is reflected in the optical axis O3a direction from the left eye subject EL to the reflection mirror 22. This light beam passes through the first polarizing member 30a again, enters the first corneal position aiming optical system 20a, is reflected by the reflection mirror 22, and is directed toward the optical axis O4a from the reflection mirror 22 toward the first confirmation window 11a. Guided to. As a result, the luminous flux that has passed through the aiming scale plate 23, the reticle plate 24, and the first confirmation window 11a reaches the examiner's eye OE, so that the examiner can observe the side of the left eye subject EL. ..

Further, for example, the luminous flux emitted from the first light source 40a and guided from the optical axis O1a toward the optical axis O2a is a dotted line when the left eye subject EL is away from the inspection window 53L. It reaches the second polarizing member 30b (second observation window 12b) through the extension line of the optical axis O2a shown by. However, since this luminous flux is linearly polarized light having a polarization axis in a specific direction by the first polarizing member 30a, it cannot pass through the second polarizing member 30b and does not enter the second corneal position aiming optical system 20b. ..

<Control unit>
For example, FIG. 8 is a schematic configuration diagram of a control system in the subjective optometry device 1. For example, the control unit 70 includes drive units (drive units 56, 57, 58, 59) included in each member of the controller 71, the non-volatile memory 72, the first light source 40a, the second light source 40b, and the optical power measurement unit 50. Etc. are electrically connected.

For example, the control unit 70 includes a CPU (processor), RAM, ROM, and the like. For example, the CPU controls each member of the optometry device 1. For example, RAM temporarily stores various types of information. For example, the ROM stores various programs for controlling the operation of the subjective optometry device 1. The control unit 70 may be composed of a plurality of control units (that is, a plurality of processors).

For example, the controller 71 inputs the objective test result (for example, spherical refractive power, columnar refractive power, astigmatic axis angle, etc.) of the subject and the interpupillary distance, and inputs the optical element 46 in the eye refractive power measuring unit 50 and the test. It is used when switching the arrangement of the windows 53 and the like. For example, the signal input from the controller 71 is input to the control unit 70 via a cable. The signal from the controller 71 may be input to the control unit 70 via wireless communication such as infrared rays.

For example, the non-volatile memory 72 is a non-transient storage medium capable of retaining the stored contents even when the power supply is cut off. For example, as the non-volatile memory 72, a hard disk drive, a flash ROM, a USB memory, or the like can be used.

<Control operation>
The operation of the subjective optometry device having the above configuration will be described. For example, the examiner may measure the interpupillary distance (PD) of the subject in advance before performing the subjective examination. When the examiner inputs the PD of the examinee using the controller 71, the control unit 70 drives the drive unit 58 to adjust the interval of the lens chamber unit 55, and the interval of the examination window 53 is set to the PD of the eye E to be inspected. Change accordingly.

In this state, the examiner instructs the examinee to look into the examination window 53. The subject abuts his / her face on the forehead pad 51 provided in the eye refractive power measuring unit 50 according to the instruction of the examiner, and looks into the inspection window 53. Here, when the examiner operates the controller 71 to set a mode for observing the corneal apex position of the examinee, the control unit 70 turns on the first light source 40a and the second light source 40b, respectively. As a result, the left eye test EL and the right eye test ER are each illuminated with a sufficient amount of light.

Next, the examiner looks into the first confirmation window 11a provided in the left eye lens chamber unit 55L in order to confirm the position of the corneal apex of the left eye subject EL. For example, FIG. 9 is a diagram showing an aiming scale plate 23 and a reticle plate 24 when confirming the position of the apex of the cornea. The examiner searches for a position where the first index 27 on the aiming scale plate 23 and the second index 29 on the reticle plate 24 match vertically and horizontally, and the first index and the second index overlap and appear to be one. .. Further, the examiner searches for a position where the tip of the reticle 28 and the center line S6 seem to match. For example, the examiner performs such alignment and then confirms the side of the left eye subject EL.

Here, for example, when the subject's face is in contact with the forehead pad 51 (or when the subject's face is in a predetermined inspection position), the luminous flux from the first light source 40a is the left eye to be inspected. It is reflected by the EL and guided to the first confirmation window 11a. However, since the light flux from the second light source 40b is blocked by the right eye subject ER, it is not guided to the first confirmation window 11a. When the examiner looks into the first confirmation window 11a in this state, the luminous flux emitted from the first light source 40a is projected onto the examiner's eye OE. For example, in such a case, the examiner can easily observe the side of the left eye-examined EL using the first confirmation window 11a and confirm the position of the corneal apex of the left eye-examined EL.

Further, for example, when the subject's face is separated from the forehead pad 51 (or when the subject's face is not in the predetermined inspection position), the luminous flux from the first light source 40a is reflected by the left eye subject EL. Instead, the light is guided toward the second confirmation window 11b. Further, the light flux from the second light source 40b is guided toward the first confirmation window 11a without being blocked by the right eye-examined ER. For example, if the first polarizing member 30a is not arranged, when the examiner looks into the first confirmation window 11a, the luminous flux emitted from the second light source 40b is incident on the examiner's eye OE. For this reason, the examiner feels glare and it becomes difficult to observe the side of the left eye subject EL. For example, as described in this embodiment, if the first polarizing member 30a is arranged in the subjective optometry device 1, the luminous flux from the second light source 40b is polarized by the first polarizing member 30a, and the first confirmation window. No light is guided to 11a. Therefore, even if the examiner looks into the first confirmation window 11a, the luminous flux emitted from the second light source 40b does not enter the examiner's eye OE. Therefore, the examiner can easily observe the side of the left eye EL to be inspected using the first confirmation window 11a without feeling the glare of the luminous flux emitted from the second light source 40b, and the cornea of the left eye to be inspected EL. You can check the position of the apex.

For example, the examiner operates the forehead contact adjustment knob 5 (see FIG. 3) while checking the side of the left eye subject EL using the first confirmation window 11a as described above, and the eye refractive power measuring unit 50. Adjust the position of the forehead pad 51 in. As a result, the examiner can move the corneal apex position of the left eye subject EL to match the scale line S2 with the corneal apex position.

After that, the examiner looks into the second confirmation window 11b provided in the lens chamber unit 55R for the right eye in order to confirm the position of the corneal apex of the right eye to be inspected ER, and aligns the right eye to be inspected ER in the same manner as described above. I do. In this embodiment, the case where the corneal apex position is confirmed in the order of the left eye test EL and the right eye test ER is given as an example, but the corneal apex position is confirmed from either the left eye test EL or the right eye test ER. You may.

As described above, for example, the subjective eye examination device in the present embodiment has a first light source that illuminates one of the left and right eyes to be inspected and the other eye to be inspected in the left and right eyes to be inspected. A second light source for illuminating is provided. Further, for example, the subjective optometry apparatus in the present embodiment suppresses the light from the second light source from being emitted from the first confirmation window via the first corneal position aiming optical system, and also suppresses the light from the first light source. It is provided with a suppression unit that suppresses light from being emitted from the second confirmation window via the second optometry position aiming optical system. Therefore, the luminous flux emitted from the first light source and the second light source is suppressed by the suppression unit when it enters the examiner's eye via the corneal position aiming optical system. That is, the luminous flux emitted from the first light source and the second light source is dimmed by passing through the suppression unit and then incident on the eye to be inspected. Therefore, the examiner can suppress the feeling of glare when observing the eye to be inspected from the first confirmation window or the second confirmation window, and the eye refractive power measurement unit and the eye to be inspected can be accurately aligned. can.

Further, for example, the subjective optometry device in the present embodiment is arranged in the first corneal position aiming unit as a suppression unit, and transmits light from the first light source to suppress the transmission of light by the second light source. It is equipped with a member. Further, the subjective optometry device in this embodiment is arranged as a suppression unit in the second corneal position aiming unit, and has a second optical member that transmits light from the second light source and suppresses light transmission by the first light source. Be prepared. As a result, the examiner can easily align the eye refractive power measuring unit and the eye to be inspected with a simple configuration.

Further, for example, the subjective optometry apparatus in this embodiment includes a first polarizing member as a first optical member and a second polarizing member as a second optical member. Further, for example, in the subjective optometry apparatus of the present embodiment, the first polarizing member is arranged in the optical path where the light of the first light source is irradiated toward the second corneal position aiming unit, and the first cornea is formed. It is located in the optical path of the position aiming unit. Further, for example, in the subjective optometry apparatus of the present embodiment, the second polarizing member is arranged in the optical path where the light of the second light source is irradiated toward the first corneal position aiming unit, and the second cornea is formed. It is located in the optical path of the position aiming unit. Therefore, the light from the first light source and the second light source is polarized, and the luminous flux from the light source that irradiates the eye to be inspected on the opposite side to the eye to be inspected that the examiner is observing is incident on the examiner's eye. Can be suppressed. As a result, even if the eye to be inspected moves from a predetermined position and the light flux from the light source is incident on the inspector's eye, the examiner can suppress the feeling of glare, and the inspected eye can be easily confirmed. .. In addition, the eye to be inspected can be illuminated with a sufficient amount of illumination light.

Further, for example, in the subjective optometry apparatus in the present embodiment, the first polarizing member and the second polarizing member are arranged so that the polarization axis of the first polarizing member and the polarization axis of the second polarization member are orthogonal to each other. Has been done. Therefore, the luminous flux guided from the first light source and the second light source to the examiner's eye can be suppressed more effectively. That is, the first polarizing member blocks the light flux transmitted through the second polarizing member, and the second polarizing member blocks the light flux transmitted through the first polarizing member. Therefore, when the examiner observes the position of the apex of the cornea of the eye to be inspected, it becomes easier to suppress the light flux guided from the light source to the examiner's eye, and the burden on the examiner can be reduced.

<Example of transformation>
In this embodiment, a configuration in which a linearly polarized light member that extracts linearly polarized light is used as the first polarized light member 30a and the second polarized light member 30b has been described as an example, but the present invention is not limited to this. For example, a configuration that converts linearly polarized light into circularly polarized light may be used. For example, as a configuration for converting linearly polarized light into circularly polarized light, a circularly polarized light member (for example, a circularly polarizing plate) may be used as the first polarized light member 30a and the second polarized light member 30b. For example, the circularly polarizing member may include a linearly polarizing member and a 1 / 4λ wave plate. In this case, for example, a circularly polarized light member in which a linearly polarized light member and a 1 / 4λ wave plate are integrally formed may be used.

Further, for example, as a configuration for converting linearly polarized light into circularly polarized light, 1/4 λ is further compared with the configuration of this embodiment (a configuration in which a linearly polarized light member is used as the first polarized light member 30a and the second polarized wave member 30b). A wavelength plate may be additionally arranged. In this case, a 1 / 4λ wave plate may be installed between the first polarizing member 30a and the left eye-tested EL and between the second polarizing member 30b and the right eye-tested ER. As a result, for example, the luminous flux emitted from the first light source 40a passes through the first polarizing member 30a to become linearly polarized light, and further passes through the 1 / 4λ wave plate to be converted into circularly polarized light. When this circularly polarized light is reflected by the left eye subject EL and returned in the incident direction, it passes through the 1 / 4λ wave plate again to become linearly polarized light, further passes through the first polarizing member 30a, and is inspected from the first confirmation window 11a. Guided to the human eye OE. Further, the luminous flux transmitted through the 1 / 4λ wave plate and converted into circularly polarized light is transmitted through the 1 / 4λ wave plate installed between the second polarizing member 30b and the right eye subject ER and converted into linearly polarized light. NS. However, since the linearly polarized light incident on the second polarizing member 30b and the polarization axis of the second polarizing member 30b are different, the transmission of light to the second polarizing member 30b is suppressed. The luminous flux emitted from the second light source 40b can be considered in the same manner as the luminous flux emitted from the first light source 40a.

In this embodiment, the configuration in which the first light source 40a and the second light source 40b are arranged between the reflection mirror 22 and the aiming scale plate 23 has been described as an example, but the present invention is not limited to this. For example, the first light source 40a and the second light source 40b may be arranged at positions where the eye E to be examined can be irradiated. In this case, the first light source 40a and the second light source 40b may be arranged in the upper part or the lower part of the reflection mirror 22, or in the upper part or the lower part of the first observation window 12a and the second observation window 12b. It may be configured to be arranged.

Further, in this embodiment, the configuration in which the first light source 40a and the second light source 40b are arranged at the center of the top and bottom of the aiming scale plate 23 and on the side of the aiming scale plate 23 has been described as an example, but the present invention is not limited to this. For example, the first light source 40a and the second light source 40b may be arranged at positions where the light flux thereof is guided to the examiner's eye OE. FIG. 10 is a diagram showing an example of transformation of the arrangement position of the light source. In FIG. 10, for convenience of explanation, the optical path is not shown, and only the optical axis is shown.

For example, FIG. 10A is a perspective view of the first corneal position aiming unit 10a as viewed from the left eye EL side. For example, FIG. 10B is a view of the first corneal position aiming unit 10a viewed from the right side of the left eye subject EL (direction of arrow A in FIG. 10A). For example, FIG. 10 (c) is a view of the first corneal position aiming unit 10a as viewed from behind the left eye subject EL (in the direction of arrow B in FIG. 10 (a)).

For example, the first light source 40a is arranged between the reflection mirror 22 and the aiming scale plate 23. Further, for example, the first light source 40a is arranged at the center on the left and right of the aiming scale plate 23 and above the aiming scale plate 23. For example, the first light source 40a arranged in this way irradiates a light beam passing through the optical axis O1a from the first light source 40a toward the reflection mirror 22. For example, the optical axis O4a from the reflection mirror 22 toward the examiner's eye OE passes through the center of the aiming scale plate 23, the reticle plate 24, and the first confirmation window 11a. For example, in this embodiment, the optical axis O1a and the optical axis O4a can be arranged at the same position in the left-right direction (X direction) with respect to the left eye subject EL in this way.

For example, at this time, the luminous flux emitted from the first light source 40a passes through the optical axis O1a and is guided in the direction of the optical axis O2a via the reflection mirror 22. For example, the light flux passing through the optical axis O2a is reflected by the left eye subject EL substantially parallel to the optical axis O2a. As a result, the optical axis O2a and the optical axis O3a are arranged at the same position in the depth direction (Z direction) with respect to the left eye subject EL. For example, the luminous flux reflected by the left eye subject EL and passing through the optical axis O3a is reflected in the direction of the optical axis O4a via the reflection mirror 22.

For example, by arranging the first light source 40a in this way, the luminous flux that has passed through the optical axis O2a and directed toward the second corneal position aiming unit 10b is the aiming scale plate 23 and the reticle in the second corneal position aiming unit 10b. The light is guided to the examiner's eye OE through the plate 24 and the substantially center of the second confirmation window 11b. Therefore, the examiner's eye OE feels more glare when observing the eye to be inspected, but the glare can be suppressed by arranging the first polarizing member 30a and the second polarizing member 30b. The alignment with the eye to be inspected can be performed accurately.

Regarding the arrangement position and optical axis of the first light source 40a in the left eye lens chamber unit 55L shown above, the arrangement position and optical axis of the second light source 40b in the right eye lens chamber unit 55R are also the same. I can think.

In this embodiment, the optical axis passing through the left eye lens chamber unit 55L and the optical axis passing through the right eye lens chamber unit 55R may be coaxial or different axes. The configuration may be. In this case, for example, the optical axis O2a in the left eye lens chamber unit 55L may be coaxial with or different from the optical axis O2b in the right eye lens chamber unit 55R. Further, for example, the optical axis O3a in the left eye lens chamber unit 55L may be coaxial with or different from the optical axis O3b in the right eye lens chamber unit 55R.

For example, when the optical axis O2a and the optical axis O2b are coaxial, the optical axis formed by reflecting the light beam (optical axis O1a) from the first light source 40a by the reflection mirror 22, and the second light source. The optical axis formed by reflecting the light source (optical axis O1b) from 40b by the reflection mirror 22 is coaxial with each other on the extension line. For example, when the optical axis O2a and the optical axis O2b are different axes, the optical axis formed by reflecting the light beam (optical axis O1a) from the first light source 40a by the reflection mirror 22 and the second The optical axis formed by reflecting the light beam (optical axis O1b) from the light source 40b by the reflection mirror 22 becomes different axes on the extension line.

Further, for example, when the optical axis O3a and the optical axis O3b are coaxial, the optical axis due to the light beam reflected by the left eye subject EL and incident on the reflection mirror 22 and the optical axis reflected by the right eye subject ER are reflected. The optical axes of the light beam incident on the mirror 22 are coaxial with each other on the extension line. For example, when the optical axis O3a and the optical axis O3b are different axes, the optical axis due to the light beam reflected by the left eye subject EL and incident on the reflection mirror 22 and the optical axis reflected by the right eye subject ER are reflected by the reflection mirror. The optical axes due to the light beam incident on the 22 are different axes on the extension line.

In this embodiment, the first corneal position aiming optical system 20a is arranged inside the optical power measuring unit 50, and the first confirmation window 11a is arranged outside the optical power measuring unit 50 as an example. Although explained above, it is not limited to this. For example, in this embodiment, the first confirmation window 11a in the first corneal position aiming unit 10a and at least one of the members constituting the first corneal position aiming optical system 20a are inside the eye refractive power measuring unit 50. It may be arranged or may be arranged outside. Similarly, in this embodiment, the second corneal position aiming unit 10b is arranged inside the optical power measuring unit 50, and the second confirmation window 11b is arranged outside the optical power measuring unit 50 as an example. Although explained above, it is not limited to this. For example, in this embodiment, the second confirmation window 11b in the second corneal position aiming unit 10b and at least one of the members constituting the second corneal position aiming optical system 20b are inside the eye refractive power measuring unit 50. It may be arranged or may be arranged outside.

In this embodiment, the configuration in which the first polarizing member 30a and the first observation window 12a are also used has been described as an example, but the present invention is not limited to this. For example, the first polarizing member 30a and the first observation window 12a may be arranged adjacent to each other. Further, for example, the first polarizing member 30a may be provided separately from the first observation window 12a.

For example, if the first polarizing member 30a and the first observation window 12a are adjacent to each other, a polarizing sheet or the like having a polarizing axis may be used as the first polarizing member 30a and attached to the first observation window 12a. For example, in this case, the first polarizing member 30a may be attached to the front side (left eye subject EL side) of the first observation window 12a, or may be attached to the rear surface side (reflection mirror 22 side) of the first observation window 12a. It may be pasted.

Further, for example, if the first polarizing member 30a is provided separately from the first observation window 12a, the first polarizing member 30a can be arranged at an arbitrary position. For example, the first polarizing member 30a may be arranged in the vicinity of the first light source 40a, or may be arranged in the vicinity of the first observation window 12a. Of course, the first polarizing member 30a may be arranged in the vicinity of the first light source 40a and in the vicinity of the first observation window 12a.

More specifically, for example, the first polarizing member 30a may be arranged in front of the first light source 40a (between the first light source 40a and the reflection mirror 22) as a vicinity of the first light source 40a. 1 It may be arranged at any position in the corneal position aiming optical system 20a. For example, any position in the first corneal position aiming optical system 20a may be between the reflection mirror 22 and the aiming scale plate 23, or between the aiming scale plate 23 and the reticle plate 24. good. Further, for example, the first polarizing member 30a may be arranged on the front surface (left eye subject EL side) of the first observation window 12a as a vicinity of the first observation window 12a, or may be arranged on the rear surface of the first observation window 12a (the rear surface of the first observation window 12a). It may be arranged between the first observation window and the reflection mirror 22).

Further, in the present embodiment, the configuration in which the second polarizing member 30b and the second observation window 12b are also used has been described as an example, but the present invention is not limited to this. For example, the second polarizing member 30b and the first observation window 12b may be arranged adjacent to each other. In this case, as in the case where the first polarizing member 30a and the first observation window 12a are arranged adjacent to each other, a polarizing sheet or the like having a polarizing axis is used as the second polarizing member 30b, and the second observation window 12b is formed. You may paste it. For example, in such a configuration, the second polarizing member 30b may be attached to either the front surface side or the rear surface side of the second observation window 12b.

Further, for example, the second polarizing member 30b may be provided separately from the second observation window 12b. In this case, the second polarizing member 30b may be arranged in the vicinity of the second light source 40b, as in the case where the first polarizing member 30a is provided separately from the first observation window 12a, or the second observation window. It may be arranged in the vicinity of 12b. Of course, the second polarizing member 30b may be arranged in the vicinity of the second light source 40b and in the vicinity of the second observation window 12b. For example, in such a configuration, the second polarizing member 30b may be arranged in front of the second light source 40b, or may be arranged at any position in the second corneal position aiming optical system 20b. good. Further, for example, the second polarizing member 30b may be arranged on the front surface of the second observation window 12b, or may be arranged on the rear surface of the second observation window 12b.

In this embodiment, the first polarizing member 30a in the left eye lens chamber unit 55L and the second polarizing member 30b in the right eye lens chamber unit 55R are arranged at the same position, but the present invention is not limited to this. .. For example, the first polarizing member 30a and the second polarizing member 30b may be provided at different positions in the left and right lens chamber units 55. For example, in this case, in the left eye lens chamber unit 55L, the first polarizing member 30a is arranged on the front side of the first observation window 12a, and in the right eye lens chamber unit 55R, the second polarizing member 30b is the second polarizing member 30b. 2 Examples thereof include a configuration in which the observation window 12b is arranged on the rear surface side.

In this embodiment, a configuration in which one polarizing member is used as the first polarizing member 30a has been described as an example, but the present invention is not limited to this. For example, the first polarizing member 30a may have a configuration in which at least one polarizing member is used. For example, in this case, the polarizing members may be arranged at a plurality of locations on the front surface of the first light source 40a and in the first corneal position aiming optical system 20a. Of course, the polarizing members may be arranged at a plurality of locations on the rear surface of the first light source 40a and in the first corneal position aiming optical system 20a. Further, in this embodiment, a configuration in which one polarizing member is used as the second polarizing member 30b has been described as an example, but the present invention is not limited to this. For example, the second polarizing member 30b may have a configuration in which at least one polarizing member is used. For example, in this case, the polarizing members may be arranged at a plurality of locations on the front surface of the second light source 40b and in the second corneal position aiming optical system 20b. Of course, the polarizing members may be arranged at a plurality of locations on the rear surface of the second light source 40b and in the second corneal position aiming optical system 20b.

In this embodiment, a configuration in which a polarizing member is used as the suppression unit 30 has been described as an example, but the present invention is not limited to this. For example, as the suppression unit 30, a filter that transmits a luminous flux having a specific wavelength can also be used. In this case, for example, a first filter capable of transmitting a light flux of a specific wavelength may be provided on the optical path through which the light flux emitted from the first light source 40a passes. Further, for example, a second filter capable of transmitting a light flux having a wavelength different from the above-mentioned specific wavelength may be provided on the optical path through which the light flux emitted from the second light source 40b passes. As a result, among the luminous fluxes emitted from the first light source 40a, the luminous flux having a specific wavelength passes through the first filter and reaches the left eye subject EL. Further, among the luminous fluxes emitted from the first light source 40a, even if the luminous flux having a specific wavelength passes through the first filter and reaches the second filter, this luminous flux does not pass through the second filter. Similarly, among the luminous fluxes emitted from the second light source 40b, the luminous flux having a wavelength different from the specific wavelength passes through the second filter and reaches the right eye to be inspected ER. Further, among the luminous fluxes emitted from the second light source 40b, even if a luminous flux having a wavelength different from a specific wavelength passes through the second filter and reaches the first filter, this luminous flux does not pass through the first filter. .. For example, even in the subjective optometry device 1 provided with such a filter, a luminous flux is incident on the optometry of the examiner's eye from a light source that irradiates the eye to be inspected on the opposite side of the eye to be observed by the examiner. Can be suppressed.

As the above-mentioned filter, a filter that transmits visible light, a filter that transmits infrared rays, and the like can be used. For example, both the first filter and the second filter may be configured to transmit a luminous flux having a wavelength in a specific visible ray, or both may be configured to transmit a luminous flux having a wavelength in a specific infrared ray. May be good. Further, when the above-mentioned filter is used, a light source that irradiates light fluxes having various wavelengths may be used, or a light source that can irradiate only light fluxes having a specific wavelength may be used.

In this embodiment, a configuration in which a polarizing member is used as the suppression unit 30 has been described as an example, but the present invention is not limited to this. For example, the suppression unit 30 may be a detection unit that detects whether or not the subject's face is in contact with the forehead pad. Hereinafter, a case where the subjective optometry device 1 in this embodiment includes a detection unit 80 will be described.

FIG. 11 is a schematic view illustrating the configuration of the detection unit. For example, the detection unit 80 may be built in the mobile unit 54. For example, the detection unit 80 includes a feed screw 81, a spring 82, a pin 83 for stopping rotation, a groove 84, a light-shielding plate 85, a flange 86, a detector 87, a mounting member 88, and the like. For example, the lead screw 81 is inserted through the moving unit 54. For example, one end of the feed screw 81 is screwed with the connecting portion 52, and the other end is fixed to the forehead rest adjusting knob 5. For example, the screwed portion of the feed screw 81 and the connecting portion 52 fits into the moving unit 54. The spring 82 is provided inside the moving unit 54, and urges the connecting portion 52 toward the subject side via the feed screw 81. The connecting portion 52 has a groove 84, and the groove 84 prevents the connecting portion 52 from rotating together with the pin 83 for stopping the rotation. Therefore, when the examiner rotates the forehead pad adjusting knob 5 to adjust the position of the forehead pad, the connecting portion 52 moves in the direction of the rotation axis of the feed screw 81, and the position of the corneal apex of the eye to be inspected and the inspection window 53. The distance can be adjusted. For example, the mounting member 88 has a forehead contact adjusting knob 5 and a fitting portion, and is fixed to the moving unit 54. For example, the light-shielding plate 85 is attached to the feed screw 81 via the flange 86. For example, the detector 87 is configured using an optical sensor such as a photointerruptor. That is, the detector 87 in this embodiment has a role of detecting the insertion / removal of the light-shielding plate 85.

For example, in the detection unit 80 having such a configuration, when the forehead of the subject abuts on the forehead pad 51, the connecting portion 52 moves toward the examiner (moves in the axial direction), so that the connecting portion The lead screw 81 screwed with the 52 moves to the examiner side against the urging force of the spring 82. Along with this, the light-shielding plate 85 moves to the examiner side (dotted line portion in the figure), so that the detector 87 detects the light-shielding plate 85. That is, in this embodiment, the detector 87 and the light-shielding plate 85 function as photo interrupters. Further, when the forehead of the subject is away from the forehead pad 51, the light-shielding plate 85 is located at the solid line portion in the drawing, so that the detector 87 does not detect the light-shielding plate 85. With such a configuration, it is possible to detect whether or not the forehead of the subject has come into contact with the forehead pad 51.

For example, in the case of a subjective optometry device having the above configuration, the control unit 70 also serves as a suppression unit 30. For example, the control unit 70 controls the first light source 40a and the second light source 40b based on the detection result of the detection unit 80. That is, if the detector 87 does not detect the insertion of the shading plate 85, the control unit 70 determines that the subject's face is not in contact with the forehead pad 51, and determines that the first light source 40a and the second light source 40b are not in contact with each other. Turns off. When the detector 87 detects the insertion of the shading plate 85, the control unit 70 determines that the subject's face is in contact with the forehead pad 51, and turns on the first light source 40a and the second light source 40b. .. As a result, even if the subject's face is separated from the forehead pad 51, a luminous flux is incident on the examiner's eye OE from the light source that irradiates the examinee's eye on the side opposite to the examiner's eye. Can be suppressed. While the face of the subject is in contact with the forehead pad 51, the first light source 40a and the second light source 40b may be turned off as in the present embodiment, or the light may be dimmed. It may be configured to light up slightly.

As described above, for example, the subjective optometry device includes a forehead pad that fixes the position of the subject's face and a detection unit that detects whether or not the subject's face is in contact with the forehead pad. .. Further, the suppression unit controls the lighting of the first light source and the second light source based on the detection result of the detection unit. As a result, the first light source and the second light source are turned off while the subject's face is not in contact with the forehead pad, and the first light source is turned off while the subject's face is in contact with the forehead pad. And the second light source is turned on. The examiner can easily turn on and off the first light source or the second light source even if the distance between the subject's face and the forehead pad changes, and the side opposite to the eye to be observed. The position of the corneal apex of the eye to be inspected can be confirmed without worrying about the glare of the light source that irradiates the eye to be inspected.

In this embodiment, a configuration in which a polarizing member is used as the suppression unit 30 has been described as an example, but the present invention is not limited to this. For example, the suppression unit 30 may be an operation unit for selecting lighting and extinguishing of the first light source 40a and the second light source 40b. Hereinafter, a case where the subjective optometry device 1 in this embodiment includes an operation unit 90 will be described.

FIG. 12 is a diagram for explaining the operation unit 90. For example, the operation unit 90 includes an operation switch 91a for controlling the lighting and extinguishing of the first light source 40a. Further, for example, the operation unit 90 includes an operation switch 91b for controlling the lighting and extinguishing of the second light source 40b. For example, such an operation unit 90 may be provided in the eye refractive power measuring unit 50 as in the present embodiment, or may be provided in the controller 71.

For example, in the case of a subjective optometry device including an operation unit 90, the control unit 70 also serves as a suppression unit 30. For example, the control unit 70 controls the first light source 40a or the second light source 40b based on the operation signal from the operation unit 90. That is, when the control unit 70 receives that the operation switch 91a is operated by the examiner and the power is turned on, the control unit 70 turns on the first light source 40a. Further, when the control unit 70 receives that the operation switch 91a is operated by the inspector and the power is turned off, the control unit 70 turns off the first light source 40a. Similarly, the control unit 70 turns on the second light source 40b when it receives that the operation switch 91b is operated by the examiner and the power is turned on. Further, the control unit 70 turns off the second light source 40b when the examiner operates the operation switch 91b and receives that the power is turned off.

For example, by providing the above configuration, it is possible to individually control the lighting or extinguishing of the first light source 40a and the lighting or extinguishing of the second light source 40b. Therefore, for example, when the examiner observes the left eye subject EL from the first confirmation window 11a, he / she operates the operation switch 91a to turn on the first light source 40a and operates the operation switch 91b to perform the second operation switch 91b. The light source 40b can be turned off. Further, when observing the right eye to be inspected ER from the second confirmation window 11b after this, the operation switch 91a is operated to turn on the first light source 40a, and then the operation switch 91b is operated to turn off the second light source 40b. Can be made to.

As described above, for example, the subjective optometry device includes an operation unit for selecting turning on and off of the first light source and the second light source. Further, the on / off of the first light source and the on / off of the second light source are individually controlled based on the operation signal from the operation unit. Therefore, the examiner can turn off the light source that illuminates the eye to be inspected on the side not to be observed and turn on only the eye to be inspected on the side to be observed. Therefore, the examiner can confirm the position of the corneal apex of the eye to be inspected without worrying about the glare of the light source that irradiates the eye to be inspected on the side opposite to the eye to be inspected.

In this embodiment, the configuration in which the first corneal position aiming unit 10a includes the first confirmation window 11a, the first observation window 12a, and the first corneal position aiming optical system 20a will be described as an example. However, it is not limited to this. For example, the first corneal position aiming unit 10a may include a light guide unit for confirming the first confirmation window 11a in addition to the above-described configuration. Further, in this embodiment, the configuration in which the second corneal position aiming unit 10b includes the second confirmation window 11b, the second observation window 12b, and the second corneal position aiming optical system 20b will be described as an example. However, it is not limited to this. For example, the second corneal position aiming unit 10b may include a light guide unit for confirming the second confirmation window 11b in addition to the above-described configuration.

FIG. 13 is a diagram for explaining a corneal position aiming unit 10 including a light guide unit 95. In the following, the light guide unit 95 included in the left eye lens chamber unit 55L will be described as an example. The light guide portion included in the right eye lens chamber unit 55R has the same configuration as the light guide portion 95 included in the left eye lens chamber unit 55L, and thus the description thereof will be omitted.

For example, the light guide unit 95 is provided in the optical power measuring unit 50. For example, the light guide unit 95 is composed of a mirror. For example, the light guide unit 95 guides the light flux from the first light source 40a that has passed through the first confirmation window 11a to the outside of the optical power measuring unit 50. For example, the luminous flux emitted from the first light source 40a passes through the optical axis O1a, the optical axis O2a, the optical axis O3a, and the optical axis O4a in this order as described above, and is guided to the light guide unit 95. Here, this luminous flux is reflected by the light guide unit 95, and is guided from the light guide unit 95 toward the optical axis O5a toward the examiner's eye OE. As a result, the luminous flux from the first light source 40a reflected by the left eye subject EL is projected onto the examiner's eye OE. For example, in the case of providing such a configuration, the examiner can confirm the side of the left eye subject EL by observing the light guide portion 95, and the reference position and the corneal apex when the lens is worn on the left eye subject EL. The distance VD can be confirmed.

1 Subjective optometry device 11 Confirmation window 12 Observation window 30 Suppression unit 40 Light source 50 Eye refractive power measurement unit 51 Forehead pad 53 Inspection window 55 Lens chamber unit 70 Control unit 80 Detection unit 90 Operation unit

Claims (4)

A subjective optometry device that subjectively measures the optical characteristics of the eye to be inspected.
A first light source that illuminates one of the left and right eyes to be inspected,
A second light source that illuminates the other eye to be inspected among the left and right eyes to be inspected, and
It has a first confirmation window and a first corneal position aiming optical system that guides the reflected light emitted from the first light source and reflected by the one eye to be inspected to the first confirmation window. A first corneal position aiming unit for confirming the distance between the apex of the corneal apex of the one eye to be inspected and the reference position for wearing the lens illuminated by one light source, and
It has a second confirmation window and a second corneal position aiming optical system that guides the reflected light emitted from the second light source and reflected by the other eye to be inspected to the second confirmation window. A second corneal position aiming unit for confirming the distance between the apex of the corneal apex of the other eye to be inspected and the reference position for wearing the lens illuminated by the two light sources, and
While suppressing the light from the second light source from being emitted from the first confirmation window through the first corneal position aiming optical system, the light from the first light source is suppressed from being emitted from the second corneal position aiming optical system. A suppression unit that suppresses irradiation from the second confirmation window via
Equipped with a,
The suppression unit includes the first optical member arranged in the first corneal position aiming unit and the second optical member arranged in the second corneal position aiming unit.
The first optical member transmits light from the first light source and suppresses light transmission by the second light source.
The second optical member is a subjective optometry apparatus characterized in that light transmitted by the second light source is transmitted and light transmission by the first light source is suppressed. In the subjective optometry device of claim 1,
The first optical member is a first polarizing member.
The second optical member is a second polarizing member.
The first polarizing member is arranged in an optical path in which the light of the first light source is emitted toward the second corneal position aiming unit, and is arranged in the optical path of the first corneal position aiming unit. ,
The second polarizing member is arranged in the optical path where the light of the second light source is emitted toward the first corneal position aiming unit, and is arranged in the optical path of the second corneal position aiming unit. A subjective optometry device characterized by this. In the subjective optometry device of claim 1 or 2.
A forehead pad that fixes the position of the subject's face,
A detection unit that detects whether or not the subject's face is in contact with the forehead pad, and
With
Based on the detection result of the detection unit, the suppression unit turns off the first light source and the second light source while the subject's face is not in contact with the forehead pad, and the subject A subjective optometry apparatus characterized in that the first light source and the second light source are controlled to be turned on while the face is in contact with the forehead pad. In the subjective optometry device of claim 1 or 2.
The suppression unit includes an operation unit for selecting lighting and extinguishing of the first light source and the second light source, and on and off the first light source based on an operation signal from the operation unit, and the above. A subjective optometry device characterized in that the lighting or extinguishing of a second light source is individually controlled.

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