JP5950008B1 - Optical measuring device - Google Patents

Abstract

A configuration in which light is emitted so as to cross the anterior chamber of the subject's eyeball and the skin around the eye or the corner of the eye is simply pushed into the orbit in light measurement for receiving the light that has crossed the anterior chamber. Compared to the above, the exposed area of the eyeball is prevented from becoming narrower. An optical measurement device according to the present invention includes a first mirror that emits light so as to cross the anterior chamber of the eyeball of a measurement subject, and the first mirror that is emitted from the first mirror and crosses the anterior chamber. A second mirror 31 that receives light, an eye pushing unit 80 that positions the first mirror 29 at a position where the skin around the eye or the eye corner of the eyeball 10 is pushed into the eye socket 17 in which the eyeball 10 is housed, and a light emitting system. The holding part 50D and the eyelid restraining part 70 that suppresses the narrowed exposed area of the eyeball accompanying this positioning are provided. [Selection] Figure 3

Description

The present invention relates to an optical measuring device.

  In Patent Literature 1, a light source device that irradiates light to an eyeball previously arranged at a predetermined position, and first backscattering by a boundary surface between the cornea and air of the eyeball irradiated to light emitted from the light source device. A light detector for detecting the intensity of the light and the intensity of the second backscattered light by the interface between the cornea and the anterior chamber, respectively, and the intensity of the first and second backscattered light in the anterior chamber Refractive index calculation means for obtaining the refractive index of aqueous humor satisfying the above, a storage unit in which the correspondence between the refractive index of the aqueous humor and the glucose concentration in the aqueous humor is stored in advance, and the correspondence stored in the storage unit And a glucose concentration calculating means for determining the glucose concentration in the aqueous humor based on the refractive index of the aqueous humor determined by the refractive index calculating means. .

In Patent Document 2, an optical rotation angle of urine whose optical rotation angle range expressed by an interfering optical rotation substance other than an optical rotation optical substance with an unknown concentration is measured, and the concentration C [kg / dl] of the optical rotation substance is expressed as ( A−A _h ) / (α × L) ≦ C ≦ (A−A _l ) / (α × L)
However, A: Rotational angle of measured urine [deg]
A _h : Maximum value of optical rotation angle [deg] expressed by interfering optical rotatory substance
A _l : Minimum value of optical rotation [deg] expressed by interfering optical rotatory substances [deg]
α: Specific rotation of optically active substance [deg / cm · dl / kg]
L: Measurement optical path length [cm]
A urine test method for determining that the range is in the range is described.

Japanese Patent No. 3543923 JP 09-138231 A

By the way, when optically measuring the glucose concentration in the aqueous humor of the eyeball, the light emitting means and the light receiving means are arranged on the eye side and the eye corner side of the eyeball, and light is emitted from the light emitting means so as to cross the anterior chamber. It is conceivable to measure the light passing through the anterior chamber by means of an optical path in which light is received by a light receiving means.
In this case, considering the direction of refraction determined by the refractive index difference between the cornea of the eyeball and the air, the emitting means or the light receiving means is positioned at the position where the skin around the eye or the corner of the eye is pushed into the orbit where the eyeball is housed. It is possible to do.
Here, when the skin around the eye or the corner of the eye is pushed into the orbit, stress is applied in the direction in which the eyelid closes with the pushing, and the exposed area of the eyeball becomes narrow, thereby limiting the optical path across the anterior chamber. There is a case.

  Therefore, in the present invention, in the optical measurement in which light is emitted so as to cross the anterior chamber of the eyeball of the measurement subject and the light that has crossed the anterior chamber is received, the skin around the eye or the corner of the eye is pushed into the eye socket. It aims at suppressing that the area | region where the said eyeball exposed is narrow compared with the structure of only.

The invention according to claim 1 is an emission means for emitting light so as to cross the anterior chamber of the eyeball of the measurement subject, and a light receiving means for receiving the light emitted from the emission means and crossing the anterior chamber. A positioning means for positioning one of the emitting means and the light receiving means at a position where the skin around the eye or the corner of the eyeball is pushed into the orbit in which the eyeball is accommodated, and the eyeball accompanying the positioning. It is an optical measuring device provided with the suppression means which suppresses that the exposed area | region becomes narrow.
According to a second aspect of the present invention, in the positioning unit, the one of the emitting unit and the light receiving unit includes a pushing portion that pushes the skin around the eye or the skin around the corner of the eye into the orbit. The optical measuring device according to claim 1.
The invention according to claim 3 is characterized in that the suppression means includes an upper eyelid suppression unit that suppresses the upper eyelid of the measurement subject and a lower eyelid suppression unit that suppresses the lower eyelid of the measurement subject. The optical measurement device according to 1 or 2.
The invention according to claim 4 is the optical measurement device according to claim 3, wherein the upper eyelid restraining portion and the lower eyelid restraining portion move in directions away from each other .

According to the first aspect of the present invention, it is possible to provide an optical measuring device that suppresses the narrowed exposed area of the eyeball, as compared with a configuration in which the skin around the eyes or the corners of the eyes is simply pushed into the eye socket.
According to the second aspect of the present invention, it is possible to simultaneously push the skin and position the emitting means or the light receiving means.
According to the third aspect of the present invention, compared to a configuration having only one of the upper eyelid restraining portion and the lower eyelid restraining portion, it is possible to suppress the exposed region of the eyeball from becoming narrow.
According to invention of Claim 4, compared with the structure which does not move to the direction which mutually spaces apart, a wrinkle is opened more largely .

It is a figure which shows an example of a structure of the optical measuring device with which this Embodiment is applied. It is a figure explaining the method to measure the rotation angle of the polarization plane by the optically active substance contained in the aqueous humor in the anterior chamber by the optical measurement device. (A) And (b) is a figure explaining the schematic structure of a wrinkle suppression part and an eye head pushing part. (A) thru | or (d) is a figure explaining the detailed structure of a wrinkle suppression part. (A) And (b) is a figure explaining the detailed structure of an upper eyelid suppression part. It is a figure explaining the effect | action of a wrinkle suppression part and an eye part pushing part. (A) And (b) is a figure explaining arrangement | positioning of an optical measuring device. (A) And (b) is a figure explaining the structure of the optical measuring device in other embodiment. It is a figure explaining the structure of the optical measuring device in other embodiment.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
(Optical measurement device 1)
FIG. 1 is a diagram illustrating an example of a configuration of an optical measurement device 1 to which the exemplary embodiment is applied. The optical measuring device 1 has a shape in which a person to be measured can hold the optical measuring device 1 with his / her hand and wear (apply) the eyeball 10 (around the eyeball 10) by himself / herself. Note that the eyeball 10 shown in FIG. 1 is the left eye.
The optical measuring device 1 includes an optical system 20 used for measuring characteristics of aqueous humor in the anterior chamber 13 of the eyeball 10 of the measurement subject, a display unit 30 that performs display for guiding the gaze of the measurement subject, and the optical system 20. The control unit 40 for controlling the display unit 30, the holding unit 50 for holding the optical system 20, the display unit 30 and the control unit 40, and the characteristics of the aqueous humor based on the data measured using the optical system 20 A calculating unit 60 for calculating, a wrinkle suppressing unit 70 that contacts the measurement subject's wrinkle and suppresses wrinkles, and an eye pressing unit 80 that presses the eye side of the measurement subject's eyelid.

In the following description, the direction between the upper side and the lower side of the optical measurement apparatus 1 shown in FIG. In addition, the direction between the front side of the measured person and the rear side of the measured person shown in FIG. In addition, the direction of the inner side (nose side, eye side) and the outer side (ear side, outer corner of the eye) of the optical measuring device 1 shown in FIG.
The characteristics of the aqueous humor measured by the optical measuring device 1 to which the present embodiment is applied include the rotation angle of the plane of polarization of linearly polarized light (the optical rotation α _M ) by the optically active substance contained in the aqueous humor, Color absorption (circular dichroism) for circularly polarized light. Note that the polarization plane of linearly polarized light refers to a plane in which an electric field vibrates in linearly polarized light.

  The optical system 20 includes a light emitting system 21 that emits light that irradiates the anterior chamber 13 of the eyeball 10 and a light receiving system 23 that receives light that has passed through the anterior chamber 13.

First, the light emitting system 21 includes a light emitting unit 25, a polarizer 27, and a first mirror 29.
The light emitting unit 25 may be a light source with a wide wavelength width such as a light emitting diode (LED) or a lamp, or may be a light source with a narrow wavelength width such as a laser. In addition, the one where the wavelength width of the light emission part 25 is narrow is preferable. The light emitting unit 25 may emit light having two or more wavelengths.
The polarizer 27 is, for example, a Nicol prism or the like, and allows linearly polarized light having a predetermined polarization plane to pass through from incident light.
The first mirror 29, which is an example of the emitting means, preferably bends the optical path 28 and maintains linearly polarized light as it is before and after reflection. If the optical path 28 does not need to be bent, the first mirror 29 may not be provided.

Next, the light receiving system 23 includes a second mirror 31, a compensator 32, an analyzer 33, and a light receiving unit 35.
The second mirror 31, which is an example of a light receiving means, is configured in the same manner as the first mirror 29 and bends the optical path 28, and preferably maintains linearly polarized light as it is before and after reflection. If the optical path 28 does not need to be bent, the second mirror 31 may not be provided.
The compensator 32 is a magneto-optical element such as a Faraday element using a garnet, for example, and rotates the polarization plane of linearly polarized light by a magnetic field.
The analyzer 33 is a member similar to the polarizer 27, and allows linearly polarized light having a predetermined polarization plane to pass therethrough.
The light receiving unit 35 is a light receiving element such as a silicon diode, and outputs an output signal corresponding to the intensity of light.

  The display unit 30 includes a display that electronically displays an image, displays a mark (target) 39 that can be viewed by the measurement subject, and guides the direction (line of sight) of the eyeball 10 in a predetermined direction. The display unit 30 displays an image of predetermined information such as the characteristics of aqueous humor (concentration of the optically active substance) calculated by the calculation unit 60.

The control unit 40 controls the light emitting unit 25, the compensator 32, the light receiving unit 35, and the like in the optical system 20 to obtain measurement data regarding the characteristics of aqueous humor. Further, the control unit 40 causes the display unit 30 to display the mark 39.
The holding unit 50 is a substantially cylindrical casing that holds the optical system 20 and the control unit 40, and has a shape that allows the person to be measured to hold the holding unit 50 with his / her hand and attach it to his / her eyeball 10. Yes. In addition, although the holding | maintenance part 50 shown in FIG. 1 is shown as a shape which cut | disconnected the cylinder with the surface parallel to an axial direction, this is for making optical system 20 easy to see. Moreover, the shape of the holding | maintenance part 50 may be another shape, for example, the cross section may be a cylinder shape with a quadrangle or an ellipse. Moreover, in the cylindrical housing, the bottom surface on the side opposite to the mounting side may be opened or may be blocked by another member.
The calculation unit 60 receives the measurement data from the control unit 40 and calculates the characteristics of the aqueous humor.

A wrinkle restraining unit 70, which is an example of a restraining means, is provided in the holding unit 50, and restrains wrinkles by bringing it into contact with the eyelids (upper eyelid 18, lower eyelid 19, see FIG. 3B described later). Keep open. The configuration of the wrinkle restraining unit 70 will be described later.
The eye pressing part 80 which is an example of a pressing part is provided in the holding | maintenance part 50, and pushes a heel toward the back | inner side. The configuration of the eye pusher 80 will be described later.

(Measurement of aqueous humor)
Next, an example in which the aqueous humor in the anterior chamber 13 is measured using the optical measurement device 1 and the glucose concentration of the aqueous humor is calculated will be described.
In diabetic patients, the amount of insulin administered is controlled by the glucose concentration in the blood. Therefore, a diabetic patient is required to always grasp the glucose concentration in the blood. As a method for measuring the glucose concentration in blood, there is a method in which a minute amount of blood is collected by puncturing a fingertip or the like with an injection needle. However, in this method, even a very small amount of blood feels pain at the time of blood collection and involves a mental burden. Thus, there is an increasing demand for a non-invasive test method that replaces an invasive test method such as puncture.

Here, the aqueous humor in the anterior chamber 13 which is almost the same component as serum contains protein, glucose, ascorbic acid and the like. It is known that there is a correlation between the glucose concentration in blood and the glucose concentration in aqueous humor. Furthermore, in the aqueous humor, there is generally no cellular material in the blood, and the influence of light scattering is small. And protein, glucose, ascorbic acid and the like contained in aqueous humor are optically active substances and have optical activity.
Therefore, in the optical measuring device 1 to which this embodiment is applied, the concentration of glucose or the like having optical activity is optically measured while using this aqueous humor.

(Optical path setting)
In the method of optically measuring the concentration of an optically active substance such as glucose contained in aqueous humor, there are the following two optical paths that can be set.
One is different from the configuration shown in FIG. 1 in that light is incident along an angle perpendicular to the eyeball 10, that is, the front-rear direction, and the interface between the cornea 14 (see FIG. 6) and aqueous humor or the eye. This is an optical path that reflects light at the interface between the aqueous humor and the crystalline lens 12 and receives (detects) the reflected light. The other is as shown in FIG. 1, in which light is incident at an angle that intersects the front-rear direction, specifically, an angle that is nearly parallel to the eyeball 10, and passes through the aqueous humor in the anterior chamber 13. It is an optical path for receiving (detecting) the received light.

As in the former case, the light path that allows light to enter the eyeball 10 at an angle close to perpendicular may cause the light to reach the retina 16 (see FIG. 6). In particular, when a highly coherent laser is used for the light emitting unit 25, it is not preferable that the light reaches the retina 16.
On the other hand, as in the latter case, in the optical path 28 in which light is incident at an angle close to parallel to the eyeball 10, the light passes through the cornea 14 so as to cross the anterior chamber 13 and passes through the aqueous humor. Is received (detected). For this reason, it is suppressed that light reaches the retina 16.

(Calculation of optically active substance concentration)
FIG. 2 is a diagram for explaining a method of measuring the rotation angle (optical rotation) of the polarization plane by the optically active substance contained in the aqueous humor in the anterior chamber 13 by the optical measurement device 1. Here, for ease of explanation, the description of the first mirror 29 and the second mirror 31 is omitted as a configuration in which the optical path 28 is not bent (is a straight line).
In addition, the state of polarized light viewed from the traveling direction of light between the light emitting unit 25, the polarizer 27, the anterior chamber 13, the compensator 32, the analyzer 33, and the light receiving unit 35 shown in FIG. This is indicated by the arrow.

The light emitting unit 25 emits light having a random polarization plane. The polarizer 27 passes linearly polarized light having a predetermined polarization plane. In FIG. 2, as an example, linearly polarized light having a polarization plane parallel to the paper surface passes.
The plane of polarization of the linearly polarized light that has passed through the polarizer 27 is rotated by the optically active substance contained in the aqueous humor in the anterior chamber 13. In FIG. 2, the plane of polarization rotates by an angle α _M (optical rotation α _M ).

Next, the polarization plane rotated by the optically active substance contained in the aqueous humor in the anterior chamber 13 is restored by applying a magnetic field to the compensator 32.
The linearly polarized light that has passed through the analyzer 33 is received by the light receiving unit 35 and converted into an output signal corresponding to the intensity of the light.

Here, an example of a method for measuring the optical rotation α _M by the optical system 20 will be described.
First, in a state where the light emitted from the light emitting unit 25 does not pass through the anterior chamber 13, light reception is performed using the optical system 20 including the light emitting unit 25, the polarizer 27, the compensator 32, the analyzer 33, and the light receiving unit 35. The compensator 32 and the analyzer 33 are set so that the output signal from the unit 35 is minimized. In the example shown in FIG. 2, in a state where light does not pass through the anterior chamber 13, the polarization plane of linearly polarized light that has passed through the polarizer 27 is orthogonal to the polarization plane that passes through the analyzer 33.

Next, it is assumed that light passes through the anterior chamber 13. Then, the polarization plane is rotated by the optically active substance contained in the aqueous humor of the anterior chamber 13. For this reason, the output signal from the light receiving unit 35 deviates from the minimum value. Therefore, the magnetic field applied to the compensator 32 is set so that the output signal from the light receiving unit 35 is minimized. That is, the plane of polarization is rotated by the compensator 32 and is orthogonal to the plane of polarization passing through the analyzer 33.
The angle of the polarization plane rotated by the compensator 32 corresponds to the optical rotation α _M generated by the optically active substance contained in the aqueous humor. Here, the relationship between the magnitude of the magnetic field applied to the compensator 32 and the angle of the rotated polarization plane is known in advance. Therefore, the optical rotation α _M can be determined from the magnitude of the magnetic field applied to the compensator 32.

Specifically, light having a plurality of wavelengths λ (wavelengths λ ₁ , λ ₂ , λ ₃ ,...) Is incident on the aqueous humor in the anterior chamber 13 from the light emitting unit 25, and the optical rotation α _M ( Optical rotations α _M1 , α _M2 , α _M3,. A set of the wavelength λ and the optical rotation α _M is taken into the calculation unit 60, and the concentration of the optically active substance to be obtained is calculated.
The concentration of the optically active substance calculated by the calculation unit 60 may be displayed on the display unit 30 included in the optical measurement device 1 or may be displayed on a PC (not shown) via output means (not shown) included in the optical measurement device 1. You may output to other terminal devices (not shown), such as (Personal Computer).

In addition, the aqueous humor includes a plurality of optically active substances as described above. Therefore, the measured optical rotation α _M is the sum of the optical rotation α _M by each of the plurality of optically active substances. Therefore, it is necessary to calculate the concentration of the optically active substance to be obtained from the measured optical rotation α _M. The calculation of the concentration of the optically active substance to be obtained may be performed by using a known method as disclosed in, for example, Japanese Patent Application Laid-Open No. 09-138231 (the above-mentioned Patent Document 2).

  In FIG. 2, it is assumed that the polarization plane of the polarizer 27 and the polarization plane before passing through the analyzer 33 are both parallel to the paper surface. However, when the plane of polarization is rotated in advance by the compensator 32, the plane of polarization before passing through the analyzer 33 may be inclined from a plane parallel to the paper surface. That is, the compensator 32 and the analyzer 33 may be set so that the output signal of the light receiving unit 35 is minimized when light does not pass through the aqueous humor in the anterior chamber 13.

Furthermore, here has been described the example using the compensator 32 as a method for determining the optical rotation alpha _M, may be obtained optical rotation alpha _M outside compensator 32. Furthermore, although the orthogonal polarizer method (however, using the compensator 32), which is the most basic measurement method for measuring the rotation angle (rotation angle α _M ) of the polarization plane, is shown here, the rotation analyzer method and the Faraday modulation are shown. Other measurement methods such as the optical delay modulation method and the optical delay modulation method may be applied.

(Structure of the eyelid restraining part 70 and the head pushing part 80)
FIGS. 3A and 3B are diagrams for explaining the schematic configuration of the eyelid restraining portion 70 and the eyepiece pushing portion 80. More specifically, FIG. 3A is a perspective view of the optical measuring device 1 as viewed from the rear side, and FIG. 3B is a diagram illustrating the eyelid restraining unit 70 and the eye pressing unit 80 and the subject's eyelid. It is a figure explaining positional relationship.

  4A to 4C are diagrams illustrating a detailed configuration of the wrinkle restraining unit 70. FIG. More specifically, FIG. 4A is a top view of the upper eyelid restraining portion 71, FIG. 4B is a front view of the upper eyelid restraining portion 71, and FIG. 4C is a side view of the upper eyelid restraining portion 71. FIG. 4D is a cross-sectional view taken along line IVd-IVd in FIG.

  FIGS. 5A and 5B are diagrams illustrating a detailed configuration of the upper eyelid suppressing unit 71. FIG. More specifically, FIG. 5A is a configuration diagram around the eye pushing portion 80 as viewed from the arrow Va in FIG. 3A, and FIG. 5B is the eye as viewed from the arrow Vb in FIG. It is a block diagram around the pushing part.

Next, the arrangement of the light emitting system 21 and the light receiving system 23, and the eyelid restraining part 70 and the eye pressing part 80 will be described with reference to FIGS.
First, when the light that has passed through the aqueous humor is detected by the optical measurement device 1 and the concentration of glucose or the like is measured, for example, the light is refracted in an unintended direction or the eye of the measurement subject It is necessary to ensure an appropriate optical path 28 that is not obstructed. Here, as a configuration in which the optical path 28 is not obstructed by the eyelid of the person to be measured, the light emitting system 21 and the light receiving system 23 are placed in regions Pa and Pb that overlap the white eye (sclera) portion of the eyeball 10 when viewed from the front. A configuration is possible in which these are arranged. However, in this configuration, when the light emitting system 21 and the light receiving system 23 are displaced to the back side (rear side) of the eyeball 10, the light emitting system 21 and the light receiving system 23 may come into contact with the white eye portion.

Therefore, the optical measuring device 1 according to the present embodiment prevents the light emitting system 21 and the light receiving system 23 from contacting the white-eye portion even when the light emitting system 21 and the light receiving system 23 are displaced in the front-rear direction. An appropriate optical path 28 is ensured.
Specifically, when the eyeball 10 is viewed from the front, the light emitting system 21 or the light receiving system 23 is positioned so as to overlap with the skin 24A around the eyes or the skin 24E around the eyes as shown in FIG. The holding unit 50 holds the light emitting system 21 and the light receiving system 23.
Further, as shown in FIG. 3A, the optical measuring device 1 according to the present embodiment includes a wrinkle suppressing unit 70 that suppresses wrinkles of the measurement subject, and an eye pressing unit that presses the skin 24A around the measurement subject's eye. 80.
The wrinkle restraining part 70 and the eye pressing part 80 are provided at the rear end of the holding part 50. Here, the eye pressing portion 80 protrudes rearward from the heel restraining portion 70. More specifically, in the illustrated example, the eye pressing portion 80 is disposed at a position that protrudes most rearward in the optical measuring device 1.
Hereinafter, the specific structure of each of the eyelid restraining part 70 and the eyepiece pushing part 80 will be described in order.

(Structure of wrinkle holding part 70)
First, the wrinkle suppressing unit 70 will be described.
As shown in FIG. 3A, the eyelid restraint unit 70 includes an upper eyelid restraint unit 71 and a lower eyelid restraint unit 72. The upper eyelid restraining part 71 and the lower eyelid restraining part 72 are respectively arranged above and below the light emitting system 21 and the light receiving system 23, respectively. In other words, the upper wrinkle suppressing portion 71 and the lower wrinkle suppressing portion 72 are provided to face each other across the optical path 28.
The wrinkle restraining portion 70 is formed of a so-called elastic member such as silicon resin (silicone), for example, in order to improve the wearing feeling of the measurement subject.

Here, as shown in FIG. 3A, the upper and lower heel restraining portions 71 and 72 are supported by the holding portion 50. Specifically, the upper heel restraining portion 71 and the lower heel restraining portion 72 are fixedly provided at the rear end of the cylindrical main body 50A, and extend along the optical path 28 and the lower support portion 50B. It is supported by the side support portions 50C.
In addition, the upper eyelid restraining portion 71 and the lower eyelid restraining portion 72, and the light emitting system 21 and the light receiving system 23 are separately arranged in a limited space around the eyeball 10 where the nose, eyelashes, etc. are present. Attempts to interfere with each other are likely to occur. Therefore, as shown in the example in the drawing, the members are supported by the holding unit 50 as a unit, thereby facilitating the arrangement of the members in the limited space.

  Further, as shown in FIG. 3B, the upper eyelid restraining part 71 and the lower eyelid restraining part 72 are provided at positions facing the upper eyelid 18 and the lower eyelid 19 in the holding part 50. Then, when the upper eyelid restraining portion 71 and the lower eyelid restraining portion 72 are pressed against the upper eyelid 18 and the lower eyelid 19, the movement of the upper eyelid 18 and the lower eyelid 19 is restricted.

Next, the shapes of the upper eyelid restraint portion 71 and the lower eyelid restraint portion 72 will be described with reference to FIGS. Here, the upper eyelid suppressing unit 71 will be described, but the upper eyelid suppressing unit 71 and the lower eyelid suppressing unit 72 are symmetrical with each other with respect to a plane whose normal is the vertical direction (FIG. 3 ( b)).
First, as shown to Fig.4 (a), the upper eyelid suppression part 71 is a rod-shaped member (substantially cylindrical member) whose cross section is circular (refer FIG.4 (d)). Moreover, the outer peripheral surface which contacts the eyelid of the upper eyelid suppression part 71 is formed by the smoothly continuous curved surface, and the corner | angular part is not formed in this outer peripheral surface.

  And the upper eyelid restraint part 71 is curved and provided along the shape along the upper eyelid 18 (see FIG. 3B), that is, the eyeball 10 (see FIG. 3B). Specifically, as shown in FIGS. 4A to 4C, the central portion in the longitudinal direction is curved in a direction projecting forward and curved in a direction projecting upward. In addition, as shown to Fig.3 (a), the upper eyelid restraint part 71 and the lower eyelid restraint part 72 are arrange | positioned so that the center side in an inside / outside direction may curve in the direction which mutually leaves | separates.

(Structure of the eye pressing part 80)
Next, the eye pushing part 80 will be described.
First, as shown in FIG. 3A, the eye pushing part 80 is supported by the holding part 50. More specifically, the eye pushing portion 80 is fixed to the light emitting system 21 (first mirror 29) held by the light emitting system holding portion 50D (described later). Here, the eye pressing part 80 and the light emitting system holding part 50 </ b> D are an example of positioning means for positioning the light emitting system 21 and the light receiving system 23 with respect to the eyeball 10 together with the eyelid restraining part 70. In other words, the eye pushing unit 80, the light emitting system holding unit 50D, and the eyelid restraining unit 70 are configured so that the light emitting system 21 (or the light receiving system 23) is applied to the eyeball 10 when the optical measurement device 1 is pressed toward the eyeball 10. On the other hand, it is supported by the holding part 50 in a positional relationship that provides a desired arrangement. In addition, this eye pushing part 80 is formed with what is called an elastic member, such as a silicon resin (silicone), for example, in order to improve a to-be-measured person's wearing feeling. In other words, the eye pressing part 80 is formed of a member softer than the first mirror 29 or the light emitting system holding part (holding part) 50D.

Now, the light emitting system holding unit 50D in the illustrated example is a substantially rectangular parallelepiped whose longitudinal direction is along the front-rear direction. The light emitting system holding unit 50D is a member that holds each of the optical members (the light emitting unit 25, the polarizer 27, the first mirror 29, and FIG. 1) constituting the light emitting system 21.
In addition, the light emitting system holding unit 50D has a rear end (protrusion) 50E that protrudes rearward from the upper eyelid suppression unit 71 and the lower eyelid suppression unit 72, and the rear end 50E has a second end. One mirror 29 is held.

The eye pressing portion 80 is fixed to the rear surface of the first mirror 29 by a known fixing method such as an adhesive (not shown). In addition, the first mirror 29 in the illustrated example is directly pressed against the person to be measured via the indentation pressing portion 80.
Here, the eye pushing portion 80 is provided so as to be integrated with the first mirror 29 which is an optical member located on the most rear side in the light emitting system 21.

  As described above, the provision of the eye pressing portion 80 on the first mirror 29 facilitates the arrangement of the members in the limited space. More specifically, it becomes easier to dispose the first mirror 29 on the back side (rear side) as compared with a configuration in which the eye pressing portion 80 and the first mirror 29 are separated. In addition, as compared with the configuration in which the eye pressing unit 80 and the first mirror 29 are separated, the first mirror 29 (light emitting system holding unit 50D) comes into contact with the nose and the optical measuring device 1 (see FIG. 3A). It is suppressed that positioning is prevented. Furthermore, the positioning of the first mirror 29 is also performed simultaneously with the pressing of the skin by the eye pressing unit 80.

Here, the arrangement of the eye pressing portion 80 will be further described.
As shown in FIG. 3 (b), the indentation pushing portion 80 is located between the upper eyelid restraint portion 71 and the lower eyelid restraint portion 72 in the vertical direction and faces the eyelid side of the upper eyelid 18 and the lower eyelid 19 Is provided. Here, the top side of the upper eyelid 18 and the lower eyelid 19 refers to a portion of the upper eyelid 18 and the lower eyelid 19 that is on the inner side (nose side) of the pupil 15. From another point of view, the eye pressing portion 80 is positioned in the region of the skin 24A around the eye. Here, the “skin around the eye” is the skin inside the pupil 15 (nose side) and in a range where it can be pushed toward the eye socket 17 described later, and the position of the front apex of the eyeball 10 when pushed. The skin that can be pushed into the back side (rear side). The “skin around the corner of the eye” is skin located on the outer side (ear side) of the pupil 15, and includes both skin in a range that can be pushed toward the eye socket 17 and skin in a range that cannot be pushed in.

  More specifically, the eye pushing part 80 is positioned in the region of the upper eyelid 18 and the lower eyelid 19 on the eyeball side, and on the eyeball 10 side (outside) of the inner peripheral surface 17A of the eye socket 17 as an example. From another point of view, the eye pressing unit 80 is positioned so as to contact the skin 24B around the eye at substantially the same position (height) as the inner eye angle (eye) 18A in the vertical direction of the eyeball 10. The The position of the inner eye angle (head) 18A in the vertical direction of the eyeball 10 is a portion where the skin is located on the most rear side (the back side of the eyeball 10) in the skin 24A around the eyeball, and is positioned at another position. In comparison, the amount of pushing the skin is reduced. The position (height) substantially the same as the inner eye angle 18A refers to a range of ± 1 mm of the position of the inner eye angle 18A in the vertical direction of the eyeball 10.

  On the other hand, at the position of the inner eye angle 18A in the vertical direction, the distance between the inner eye angle 18A and the inner peripheral surface 17A of the orbit 17 is the shortest, so that it is difficult to secure a positioning region depending on the shape of the eye pushing part 80. There is. In such a case, you may position so that the front-end | tip of the eye pushing part 80 may contact the position (for example, upper position 24C or lower position 24D) shifted | deviated up and down rather than the position of the internal eye angle 18A. As the distance from the position of the inner eye angle 18A is shifted in the vertical direction, the distance between the inner eye angle 18A and the inner peripheral surface 17A of the orbit 17 is increased, so that the area where the eye pushing part 80 can be positioned becomes wider.

Note that it is not always necessary to be constant in the area of the skin 24A around the eyes. For example, in consideration of the shape around the eyeball 10 of the person to be measured, the shape of the eye pressing portion 80, the positioning accuracy, and the like, the optical measuring device 1 is positioned so that the optical path 28 is easily secured for each person to be measured. It may be configured.
Although details will be described later, when the eye pressing portion 80 is pressed against the skin 24A around the eye, the skin 24A around the eye is pushed into the back side (rear side) of the eye socket 17.

Next, the shape of the eye pressing portion 80 will be described with reference to FIGS.
As shown in FIGS. 5 (a) and 5 (b), the eye pushing part 80 is a substantially hemispherical member. In other words, the eye pressing portion 80 includes a convex portion 80A that protrudes rearward. Further, the eye pushing portion 80 includes a concave portion 80B along the outer shape of the first mirror 29 on the side (front side) in contact with the first mirror 29 (see FIG. 3A).
The convex portion 80A is a portion that contacts the heel. The convex portion 80A in the illustrated example is formed by a smoothly continuous curved surface (curved surface) and does not have a corner portion.

(Effects of the eyelid restraining part 70 and the eye pressing part 80)
FIG. 6 is a view for explaining the operation of the eyelid restraining part 70 and the eye-entry pushing part 80. In addition, in FIG. 6, the state which looked at the cross section in the center position of the up-down direction of the eyeball 10 from the to-be-measured person's head side (upper side) is shown.

Next, with reference to FIGS. 3 and 5, the operation of the eyelid restraining portion 70 and the eye pushing portion 80 will be described.
For convenience of explanation, the eyeball 10 and the structure around the eyeball will be described, and the positional relationship between the eyeball 10 and the optical path 28 will be described. Explain.

(Eyeball 10 and structure around eyeball 10)
First, the structure of the eyeball 10 and the periphery of the eyeball 10 will be described.
As shown in FIG. 6, the eyeball 10 has a substantially spherical outer shape, and has a glass body 11 at the center. A crystalline lens 12 serving as a lens is embedded in a part of the glass body 11. There is an anterior chamber 13 on the front side of the crystalline lens 12, and a cornea 14 on the front side. The peripheral portion of the crystalline lens 12 is surrounded by an iris, and the center is the pupil 15. The glass body 11 is covered with a retina 16 except for a portion in contact with the crystalline lens 12.

The anterior chamber 13 is a region surrounded by the cornea 14 and the crystalline lens 12, and is a region protruding from the spherical shape of the eyeball 10 in a convex shape. The anterior chamber 13 is circular when viewed from the front. The anterior chamber 13 is filled with aqueous humor.
The eyeball 10 is accommodated in the eye socket 17 which is a dent (concave part) of the skull. The eyeball 10 is covered with eyelids (upper eyelid 18 and lower eyelid 19).

Here, the orbit 17 in this embodiment is a region where the skull (the inner peripheral surface 17A of the orbit 17) begins to dent toward the back side (rear side) of the eyeball 10 with respect to the surface of the skin as shown in FIG. A region 17B and a region 17D in which the distance between the surface of the skin and the inner peripheral surface 17A of the eye socket 17 gradually increases are present on the eye side and the eye corner side of the area 17B of the eye socket 17. That is, the skin 24A around the eyes and the skin 24E around the eyes are deeper in the eyeball 10 than the skin outside the area 17B of the eye socket 17 in the eye area 17C and the eye corner area 17D in the eye socket area 17B. The amount that can be pushed toward the side has increased.
Further, as shown in FIG. 6, in a general subject, the skin 24A around the eye is positioned on the front side in the front-rear direction than the skin 24E around the corner of the eye. Therefore, when positioning the first mirror 29 (light-emitting system 21) and the second mirror 31 (light-receiving system 23) with the eyeball 10 facing front (normal viewing state), depending on the person to be measured, the skin on the front side It may be necessary to push in 24A.

  Therefore, in the present embodiment, the amount of the region 17C on the eye side in the region 17B of the orbit 17 can be pushed more toward the back side (rear side) of the orbit 17 than the skin outside the region 17B of the orbit 17. The first mirror 29 (light emitting system 21) is pushed toward the eye socket 17 by utilizing the above. In other words, the first mirror 29 (light emitting system 21) is positioned at a position where the skin 24A around the eye is pushed between the inner peripheral surface 17A of the eye socket 17 and the eyeball 10. By doing in this way, when measuring with the eyeball 10 facing front (normal vision state), there is no space (small) in which the first mirror 29 (light emitting system 21) is arranged by the skin 24A around the eyes. Even so, the optical path 28 across the anterior chamber 13 is secured by pushing the skin 24A around the eye into the eye socket 17.

(Positional relationship between eyeball 10 and optical path 28)
Next, the positional relationship between the eyeball 10 and the optical path 28 of the optical system 20 will be described.
As shown in FIG. 6, the light emitted from the light emitting system 21 enters the anterior chamber 13 in a direction toward the outer side in the inner and outer directions and in a direction toward the front side in the front and rear direction. The light that has passed through the anterior chamber 13 is incident on the light receiving system 23 in a direction toward the outside in the inside / outside direction and in a direction toward the back side in the front / rear direction.
That is, the light emitting system 21 (first mirror 29) is arranged so that light emitted from the light emitting system 21 toward the anterior chamber 13 proceeds obliquely toward the front side in the front-rear direction. In other words, the first mirror 29 is arranged on the rear side (back side) of the front part of the exposed part (anterior chamber 13) of the eyeball 10.
The light receiving system 23 (second mirror 31) is disposed so as to receive light traveling obliquely from the anterior chamber 13 toward the rear side in the front-rear direction. In other words, the second mirror 31 is arranged on the rear side of the front top of the exposed part (anterior chamber 13) of the eyeball 10.

  This arrangement is for the following reason. That is, the light emitted from the light emitting unit 25 passes through the cornea 14 and enters the anterior chamber 13. At this time, the refractive index of aqueous humor in the cornea 14 and the anterior chamber 13 is larger than air (n = about 1.0) (n = 1.37), and the anterior chamber 13 and the cornea 14 are convex. Therefore, the optical path 28 is bent to the rear side (eyeball 10 side). Further, even after passing through the anterior chamber 13, the optical path 28 is further bent rearward. Therefore, the light emitting system 21 and the light receiving system 23 are disposed in consideration of being bent rearward by passing through the anterior chamber 13.

  Further, a nose (nasal bridge) is located around the eyes of the face (eyeball 10), and there is little space for setting the optical system 20. Furthermore, if the light goes out of the anterior chamber 13, accurate measurement cannot be performed. Therefore, it is preferable that the optical path 28 is set so that the light crosses the anterior chamber 13 without deviating from the anterior chamber 13.

The optical rotation α _M is affected by the optical path length, which is the length of light passing through the aqueous humor in the anterior chamber 13. Therefore, the optical path 28 is preferably set as described above so that the optical path length does not vary. In the illustrated optical measurement device 1, the optical path 28 is set so as to cross the anterior chamber 13, so that the optical path length can be set longer.

(Specific action of the eyelid restraining part 70 and the eye-entry pushing part 80)
Next, the operation of the eyelid restraining part 70 and the eye pressing part 80 will be specifically described.
First, by pressing the eye pressing portion 80 against the eyelid (upper eyelid 18 and lower eyelid 19) of the person to be measured, the skin 24A around the eye is pushed into the back side (rear side). More specifically, the eye pressing part 80 pushes the skin 24 </ b> A around the eye head between the inner peripheral surface 17 </ b> A of the eye socket 17 and the eyeball 10.

  As shown in FIG. 6, the length of the portion of the eyeball 10 protruding from the skin 24A around the eye when not pushed in, that is, the protrusion degree Ga of the eyeball 10 to the skin 24A around the eye is about 6 mm. Yes, the protrusion degree Gb with respect to the skin 24E around the outer corner of the eye is about 11 mm to 12 mm. Further, the amount of movement Gc of the skin 24A around the eye when being pushed by the eye pushing part 80 is, for example, about 3 to 5 mm under the condition that the measurement subject does not cause pain. That is, the protrusion degree Ga + movement amount Gc with respect to the skin 24A around the eye and the protrusion degree Gb with respect to the skin 24E around the outer corner of the eye when the skin 24A around the eye is pushed in are substantially the same.

  In this way, as the eye pressing portion 80 pushes the skin 24A around the eye, a larger space for arranging the first mirror 29 (light emitting system 21) is secured. That is, the first mirror 29 can be arranged on the rear side. This makes it easy to secure the optical path 28 that passes through the aqueous humor of the anterior chamber 13 even when the eyeball 10 is in the front (normal viewing state). In other words, the upper eyelid 18 and the lower eyelid 19 prevent the optical path 28 from being blocked.

  Now, by pressing the eyelid restraint part 70 (upper eyelid restraint part 71 and lower eyelid restraint part 72) against the eyelids (upper eyelid 18 and lower eyelid 19) of the person to be measured, the optical measuring device worn on the subject to be measured 1 (see FIG. 1) is defined. That is, the eyelid restraining part 70 functions as a positioning means for the eyeball 10 together with the eye pressing part 80 and the light emitting system holding part 50D. Further, when the eyelid restraining part 70 is pressed, stress acts in a direction in which the upper eyelid 18 and the lower eyelid 19 open along the eyeball 10, and the upper eyelid 18 and the lower eyelid 19 are maintained in an open state.

  Here, as the skin 24A around the eyes is pushed by the eye pushing part 80, the eyelids try to close. In other words, as the eyelid is pushed into the back side by the indentation pushing portion 80, a stress to be closed acts on the eyelid connected to the skin 24A around the eyelid. On the other hand, the heel restraining part 70 restrains the heel from closing, and the state where the heel is opened is maintained. In other words, when the skin 24 </ b> A around the eye is pushed into the eye socket 17, the eyelid 10 moves in the closing direction with the pushing, and the region where the eyeball 10 is exposed from the skin becomes narrower, so that the aqueous humor of the anterior chamber 13 is reduced. The optical path 28 passing through can be restricted. In the present embodiment, the eyelid suppression unit 70 prevents the exposed area of the eyeball 10 from being narrowed, so that it passes through the aqueous humor of the anterior chamber 13 as compared to the configuration without the eyelid suppression unit 70. The optical path 28 is easily secured. Note that “suppressing the exposed area of the eyeball 10 from becoming narrow” means that the area where the eyeball 10 is exposed is wider than the configuration without the eyelid suppressing portion 70 when the light emitting system 21 emits light. This includes a configuration in which the exposed region of the eyeball 10 is wider than the state where the skin is not pushed in.

(Inner rotation measurement)
An embodiment in which the eyeball 10 is measured while being inwardly rotated will be described with reference to FIGS. 7 (a) and 7 (b). Here, FIG. 7A is a diagram for explaining the arrangement of the optical measurement device 1 when measured in a normal vision state, and the position of the skin 24E around the outer corner of the eye is closer to the front side in the front-rear direction than the face shape in FIG. 6 is different from FIG. FIG. 7B is a diagram for explaining the arrangement of the optical measurement device 1 when measurement is performed with the eyeball 10 being inverted. For the convenience of drawing, the dimensions shown in FIG. 7 are different from the dimensions shown in FIG.
In addition, when the eyeball 10 is viewed from the front, the rotation of the eyeball 10 (pupil 15) in the range of ± 45 ° in the vertical direction with respect to the inside / outside direction is referred to as “inversion”. The rotation of the eyeball 10 (pupil 15) in the range of ± 45 ° in the vertical direction with reference to the inner and outer directions is called “abduction”. Here, it is an example of “inner rotation” that the eyeball 10 rotates inward (nose side) around the axis 10A, and “outward rotation” means that the eyeball 10 rotates outward (ear side) around the axis 10A. Is an example.

First, as shown in FIG. 7A, depending on the shape of the face of the person to be measured, the skin 24E around the outer corner of the eye may protrude forward in the front-rear direction from the shape shown in FIG. For example, when the positions of the skin 24A around the eyes and the skin 24E around the corners of the eyes are substantially the same in the front-rear direction, the anterior chamber 13 is not properly pushed into the eyes as far as the eyes can be pushed as much as the eyes. It may be difficult to secure the optical path 28 that passes through the aqueous humor.
Moreover, the general person to be measured has a larger amount of eyelashes on the outer corner of the eye than on the outer side of the eye. Therefore, even when the skin 24E around the outer corner of the eye is located on the back side in the front-rear direction than the skin 24A around the outer eye as in the shape shown in FIG. In the state, it may be difficult to secure the optical path 28 that passes through the aqueous humor of the anterior chamber 13.

  Therefore, as shown in FIG. 7B, in addition to pressing the skin 24A around the eye, the eyeball 10 is inverted. In this way, the position of the light receiving system 23 (second mirror 31) disposed on the outer corner side can be disposed on the front side in the front-rear direction of the eyeball 10 with respect to the normal viewing state. That is, the light receiving system 23 (second mirror 31) can be moved away from the skin 24E around the outer corners of the eyes and the eyelashes on the outer corners of the eyes. Thereby, it is suppressed that the optical path 28 is blocked by the skin 24E around the outer corner of the eye and the eyelashes on the outer corner of the eye, and the optical path 28 that passes through the aqueous humor of the anterior chamber 13 can be easily secured.

  Specifically, as shown in FIG. 7B, a mark 39 is displayed on the display unit 30 of the optical measurement device 1 in order to make the eyeball 10 inverted during measurement. Specifically, the mark 39 is displayed at a position where the eyeball 10 is in an inverted state when the measurement subject visually observes it. In this way, the line of sight is directed toward the mark 39 by, for example, displaying the mark 39 on the display unit 30. Then, the measurement is executed in a state where the eyeball 10 is inverted and the optical path 28 is secured.

In the illustrated example, the second mirror 31 is disposed in front of the first mirror 29. This suppresses the light receiving system 23 (second mirror 31) from coming into contact with the measurement subject. In other words, the light receiving system 23 (second mirror 31) is prevented from being pressed, and the wearing feeling of the measurement subject is improved.
In addition, here, the mark 39 is displayed on the display unit 30 at the time of measurement, but the mark 39 may be always displayed. In this case, the display unit 30 may not be a display that electronically displays an image, and a member or a shape that can function as the mark 39 may be provided.

(Other embodiment 1)
FIGS. 8A and 8B are diagrams illustrating the configuration of the optical measurement devices 101 and 301 according to another embodiment. More specifically, FIG. 8A is a diagram illustrating the configuration of the optical measurement device 101 according to another embodiment 1, and FIG. 8B is the configuration of the optical measurement device 301 according to another embodiment 2. It is a figure explaining.
In the optical measurement device 1 illustrated in FIG. 1 and the like described above, the configuration in which the position of the wrinkle suppressing unit 70 is fixed has been described, but the configuration is not limited thereto. For example, as in the optical measurement device 101 illustrated in FIG. 8A, the eyelid suppressing unit 700 (the upper eyelid suppressing unit 710 and the lower eyelid suppressing unit 720) may be configured to move.

  More specifically, the optical measuring device 101 shown in FIG. 8A includes a motor M1, a gear group 730 that transmits a driving force from the motor M1, and rotating shafts 711 and 721 extending in the inner and outer directions. , And connecting members 713 and 723 connected to the upper eyelid restraining portion 710 and the lower eyelid restraining portion 720, respectively. The motor M1, the gear group 730, the rotating shafts 711 and 721, and the connecting members 713 and 723 are provided inside the holding unit 500. Further, the optical measurement device 101 includes an operation button 740 that triggers the driving of the motor M1.

The operation of the optical measuring device 101 will be described.
First, the optical measurement device 101 is mounted on the eyelid of the person to be measured, and the upper eyelid restraint unit 710 and the lower eyelid restraint unit 720 come into contact with the upper eyelid 18 and the lower eyelid 19 (see FIG. 3B). In this state, for example, when the measurement subject operates the operation button 740, the motor M1 is driven. As the motor M1 is driven, the upper eyelid suppression unit 710 and the lower eyelid suppression unit 720 move in directions away from each other (see arrows B1 and B2). As a result, the upper eyelid 18 and the lower eyelid 19 are opened. Thus, in the optical measuring device 101, the bag can be opened more reliably by driving the motor M1.

(Other embodiment 2)
Further, as shown in FIG. 8B, the eyelid restraining unit 900 (the upper eyelid restraining unit 910 and the lower eyelid restraining unit 920) moves by a force pressing the optical measuring device 301 against the person to be measured. May be.

If it demonstrates concretely, the optical measuring device 301 is provided with the following structures as a mechanism to which the upper eyelid suppression part 910 is moved. That is, it includes a truncated conical covering surface 510A that covers the rear side of the holding portion 510 and a guide groove 510B that is provided along the outer peripheral surface of the covering surface 510A and whose longitudinal direction extends in the vertical direction. Further, the optical measuring device 301 includes a pin-shaped guided portion 911 that is movably provided in the guide groove 510B, a connecting member 913 that connects the guided portion 911 and the upper eyelid restraining portion 910, and a connecting member 913. And a spring 930 for biasing. Here, the spring 930 biases the connecting member 913 in such a direction that the upper eyelid restraining portion 910 and the lower eyelid restraining portion 920 approach each other.
Although not shown in FIG. 8B, the optical measurement device 301 includes a mechanism for moving the lower eyelid restraining unit 920 as well as a mechanism for moving the upper eyelid restraining unit 910.

The operation of the optical measurement device 301 will be described.
First, the optical measurement device 301 is mounted on the eyelid of the measurement subject, and the upper eyelid restraint unit 910 and the lower eyelid restraint unit 920 come into contact with the upper eyelid 18 and the lower eyelid 19 (see FIG. 3B).
For example, when the person to be measured applies a force to further press the optical measuring device 301 against the upper eyelid 18 and the lower eyelid 19, the guided portion 911 is placed in the guide groove 510B while facing the urging force of the spring 930. To move. As a result, the upper eyelid restraining portion 910 and the lower eyelid restraining portion 920 connected to the connecting member 913 move in directions away from each other (see arrows D1 and D2). As a result, the upper eyelid 18 and the lower eyelid 19 are opened.
As described above, in the optical measurement device 301, the measurement subject does not receive the driving force from the driving source and uses the force by which the measurement subject presses the optical measurement device 301 against the upper eyelid 18 and the lower eyelid 19, so Can be opened.

(Other embodiment 3)
FIG. 9 is a diagram illustrating a configuration of an optical measurement device 501 according to another embodiment.
In the optical measurement device 1 shown in FIG. 1 and the like described above, the configuration in which the position of the eye pushing portion 80 is fixed has been described, but the configuration is not limited thereto. For example, like the optical measuring device 501 shown in FIG. 9, the eye pressing unit 80 may be configured to move.

  More specifically, the optical measurement device 501 shown in FIG. 9 includes a wrinkle restraining unit 170 that touches the measurement subject's eyelid to suppress wrinkles, a movable push-in portion 180 that pushes the eyelid side of the measurement subject's eyelid, and Similar to the optical measurement device 1 shown in FIG. 1 and the like, an optical system 200 used for measuring characteristics of aqueous humor of the eyeball 10 of the measurement subject is provided.

The eyelid suppression unit 170 includes an upper eyelid suppression unit 171, a lower eyelid suppression unit 172, a holding member 175 that holds the upper eyelid suppression unit 171 and the lower eyelid suppression unit 172, and a support member 177 that supports the holding member 175. And a base 179 that supports the support member 177.
In addition, the movable pushing portion 180 is provided with an eye pushing portion 181 for pushing the skin 24A around the eye of the person to be measured and the eye pushing portion 181 provided in the same manner as the optical measuring device 1 shown in FIG. A part 183 and a slide support part 185 that slidably supports the moving part 183. Note that the moving unit 183 in this example moves in the front-rear direction upon receiving a drive from a motor (not shown). Further, the slide support portion 185 is fixed with respect to the base portion 179.
In addition, the optical system 200 in this example is fixed with respect to the moving unit 183 of the movable pushing unit 180. The optical system 200 moves in the front-rear direction together with the moving unit 183.

Next, the operation of the optical measuring device 501 will be described.
First, the optical measuring device 501 is fixedly provided on the work table 190 or the like. Then, the measurement subject presses the face against the optical measurement device 501 at a position where the measurement subject's eyelid contacts the upper eyelid suppression unit 171 and the lower eyelid suppression unit 172 of the optical measurement device 501. In this state, for example, a motor (not shown) is driven by operating an operation button (not shown).

  As the motor is driven, the slide support portion 185 moves rearward in the front-rear direction (see arrow F1). As a result, the eye pushing portion 181 attached to the tip of the slide support portion 185 pushes the eye side of the measurement subject's heel toward the rear side in the front-rear direction. As a result, the optical path 28 (see FIG. 1) passing through the aqueous humor is more reliably ensured. In this state, the measurement of the characteristics of the aqueous humor of the eyeball 10 is executed by the optical system 200.

Here, the optical system 200 has been described as being fixed with respect to the moving unit 183 of the movable pusher unit 180, but the present invention is not limited to this. For example, it may be configured to move in the front-rear direction by a separate drive from the moving unit 183 of the movable pushing unit 180, or the position of the optical system 200 may be fixed.
In addition, although it has been described here that the moving unit 183 moves by receiving a driving force from a motor (not shown), the present invention is not limited to this. For example, it may be configured such that a measurer who operates the optical measurement device 501 manually moves the moving unit 183.

  Here, the description has been given of providing the movable pushing portion 180 in the optical measuring device 501 fixed on the work table 190 or the like, but the present invention is not limited to this. For example, the optical measuring device 1 as shown in FIG. That is, it is good also as a structure which moves the eye part pushing part 80 (FIG. 1) provided in 50 A of main bodies (refer FIG. 1) to the front-back direction.

(Modification)
In the above description, it has been described that the eye pressing portion 80 presses (presses) the skin 24A around the eye. However, the present invention is not limited to this. For example, a mode in which only the skin 24E on the outer corner of the eye is pushed, or a mode in which both the skin 24A around the eye and the skin 24E on the outer corner of the eye are pressed may be employed. When the skin 24E around the corner of the eye is pushed into the eye socket 17, a member similar to the eye pushing part 80 may be provided at the tip of the light receiving system 23.

  In the above description, it has been described that the eye pressing portion 80 is configured by a single member, but the present invention is not limited to this. The aspect which the eye part pushing part 80 comprises with a some member may be sufficient. To further explain, for example, the eye pressing unit 80 may be configured by two members that press the upper eyelid 18 and the lower eyelid 19 each included in the skin 24A around the eye.

  Moreover, the shape of the eye pushing part 80 is not specifically limited. More specifically, a spherical member, an arc-shaped member, or a plate-shaped member can be used as long as it can maintain a state in which a gap that allows light passing through the eyeball 10 to pass through can be maintained. Of course, other shapes may be used.

  Moreover, the position in which the eye pushing part 80 in the optical measuring device 1 is provided is not specifically limited. To describe further, it is only necessary that the eye pressing portion 80 can push the skin 24A around the eye into the back side (rear side). The structure in which the eye pressing portion 80 is held by the light emitting system holding portion 50D and other members It may be configured to be fixed to the first mirror 29 via

  In the above description, it has been described that the heel restraining portion 70 is configured by a plurality of members (the upper heel restraining portion 71 and the lower heel restraining portion 72), but is not limited thereto. For example, the heel restraining portion 70 may be configured by either one of the upper heel restraining portion 71 and the lower heel restraining portion 72. Or the structure by which the upper side hull suppression part 71 and the lower side wrinkle suppression part 72 are integrally formed may be sufficient.

Moreover, the shape different from the above may be sufficient as the upper side wrinkle suppression part 71 and the lower side wrinkle suppression part 72. FIG. More specifically, a gap is formed between the upper eyelid 18 and the lower eyelid 19 so as to allow light to pass through at least one of the upper eyelid 18 and the lower eyelid 19 (see FIG. 3B). Of course, other shapes such as a hemispherical member or a plate-like member may be used as long as the state can be maintained.
Further, it may be configured such that either one of the upper heel restraining portion 71 and the lower heel restraining portion 72 is configured to move as described in FIG. 9 and the other is fixed. For example, a configuration in which the upper heel restraining portion 71 is movable and the lower heel restraining portion 72 is fixed may be employed.

Moreover, although the eyelid restraining part 70 (the upper eyelid restraining part 71 and the lower eyelid restraining part 72) has been described as a structure that directly restrains the eyelid of the person being measured, it contacts the skin around the eyeball 10 of the person being measured. And if it is the structure which maintains a to-be-measured person's heel in the open state, it will not be limited to this.
Note that the skin around the eyeball 10 is a region in a range where movement (opening / closing) of at least one of the upper eyelid 18 and the lower eyelid 19 is restricted by contact of the eye pressing portion 80 and the eyelid restraining portion 70. Say.

In addition, it has been described that the eye pressing portion 80 and the wrinkle suppressing portion 70 are formed of silicon resin (silicone), but are not limited thereto. For example, the eye pressing part 80 and the eyelid restraining part 70 may be made of other resin, metal, or the like. Moreover, you may form the eye part pushing part 80 and the wrinkle suppression part 70 by apply | coating an acrylic adhesive to the resin body formed with a vinyl chloride etc. Furthermore, it is good also as a structure which provides a medical adhesive tape in the outer peripheral surface of the eye part pushing part 80 and the wrinkle suppression part 70, for example.
In addition, it is preferable that the indentation pushing part 80 and the wrinkle suppression part 70 are formed with a material with high frictional force and high safety | security.

In the above description, the light emitting system 21 is disposed on the nose side (eye side) and the light receiving system 23 is disposed on the ear side (eye corner side), but the opposite configuration, that is, the light emitting system 21 is disposed. It may be arranged on the nose side and the light receiving system 23 may be arranged on the ear side.
The optical path 28 is not limited to the configuration shown in the figure, and may be set so that light emitted from the light emitting unit 25 passes through the anterior chamber 13 and is received by the light receiving unit 35. That's fine. Further, the passage of light across the anterior chamber 13 means that when the eyeball 10 is viewed from the front, an angle closer to the inner and outer directions than the vertical direction (that is, less than ± 45 ° with respect to the horizontal axis in the inner and outer directions). (Including the case of passing diagonally in the front-rear direction).

  In the above description, the light emitting system 21 disposed on the nose side has been described as protruding forward from the light receiving system 23 disposed on the ear side. However, the present invention is not limited to this. For example, the configuration in which the light emitting system 21 and the light receiving system 23 are arranged at corresponding positions (the same position) in the front-rear direction, or the light receiving system 23 arranged on the ear side is more than the light emitting system 21 arranged on the nose side. It may be configured to protrude to the front side.

In the above description, the method for calculating the concentration of the optically active substance to be obtained contained in the aqueous humor has been described. However, other characteristics of the aqueous humor may be measured.
In addition to the characteristics relating to aqueous humor, the configuration described in the present embodiment may be applied to obtain characteristics relating to the cornea and the like existing in the optical path 28. That is, the configuration described in the present embodiment is any device that receives light from the outside of the eyeball 10, passes the light through the cornea 14 and the aqueous humor in the anterior chamber 13, and receives the passed light. Is applicable.
In the description of the present embodiment, the left-eye eyeball 10 has been described, but the optical measurement device 1 may naturally be applied to the right-eye eyeball (not shown).

Further, although various embodiments and modifications have been described above, it is needless to say that these embodiments and modifications may be combined.
Further, the present disclosure is not limited to the above-described embodiment, and can be implemented in various forms without departing from the gist of the present disclosure.

DESCRIPTION OF SYMBOLS 1 ... Optical measuring device, 10 ... Eyeball, 13 ... Anterior chamber, 20 ... Optical system, 21 ... Light emission system, 23 ... Light reception system, 29 ... 1st mirror, 50 ... Holding part, 70 ... Wrinkle suppression part, 71 ... Upper eyelid restraint part, 72 ... Lower eyelid restraint part, 80 ... Eye head pushing part

Claims (4)

Emitting means for emitting light so as to cross the anterior chamber of the eyeball of the measurement subject;
A light receiving means for receiving light emitted from the emitting means and crossing the anterior chamber;
Positioning means for positioning one of the emitting means and the light receiving means at a position where the skin around the eyes or the corners of the eyes is pushed into the orbit in which the eyeball is housed;
An optical measurement apparatus comprising: a suppressing unit that suppresses a reduction in an exposed area of the eyeball accompanying the positioning.   2. The positioning unit according to claim 1, wherein the one of the emitting unit and the light receiving unit includes a pushing portion that pushes the skin around the eye or the skin around the corner of the eye into the eye socket. Optical measuring device.   The optical measurement apparatus according to claim 1, wherein the suppression unit includes an upper eyelid suppression unit that suppresses the upper eyelid of the measurement subject and a lower eyelid suppression unit that suppresses the lower eyelid of the measurement subject. The optical measurement apparatus according to claim 3, wherein the upper eyelid restraining portion and the lower eyelid restraining portion move in directions away from each other .

Images