WO2016002296A1 - Optical control device and optical control method - Google Patents

Abstract

[Problem] To provide an optical control device and an optical control method for carrying out orthoptics more suitable to a user. [Solution] In the present invention, an optical control device is provided with the following: a distance calculation unit that calculates an inter-subject distance between a user and an object picked up in an image captured from the user's viewpoint; and a control unit that controls the focal length of an optical lens, which corrects the vision of the user, on the basis of the inter-subject distance calculated by the distance calculation unit and the visual acuity of the user.

Description

Optical control device and optical control method

The present disclosure relates to an optical control device and an optical control method.

For example, glasses and contact lenses are known as general vision correction devices. In these visual acuity correction devices, the refractive power of the lens for correcting the visual acuity is fixed by the lens and is not variable.

Therefore, for example, when a user whose visual acuity has been corrected so that an object at a long distance can be clearly seen by a vision correction device, the user is overcorrected, which may overload the user's eyes. there were.

Therefore, Patent Literature 1 discloses a vision correction device that detects a user's eye movement to calculate the gaze direction and the distance to the gaze target, and controls the focal length of the lens according to the distance to the gaze target. Has been.

Special table 2013-535022 gazette

However, in the technique disclosed in Patent Document 1, since the distance from the user's eye movement to the gaze target is calculated, the distance is calculated for a target that is present in the user's field of view but is not being watched by the user. It was difficult. Therefore, with the visual acuity correction device disclosed in Patent Document 1, it has been difficult to perform appropriate visual acuity correction based on the entire visual field including the target that the user is not gazing at.

Therefore, the present disclosure proposes a new and improved optical control device and optical control method capable of performing more appropriate visual acuity correction for the user.

According to the present disclosure, a distance calculation unit that calculates an inter-target distance between an object captured in a captured image at the user's viewpoint and the user from the captured image, an inter-object distance calculated by the distance calculation unit, and the user And a control unit that controls a focal length of an optical lens that corrects the user's visual acuity based on the visual acuity of the user.

Further, according to the present disclosure, the arithmetic processing device calculates the distance between the object captured in the captured image at the user's viewpoint and the user from the captured image, and the distance between the objects calculated from the captured image. And controlling the focal length of an optical lens that corrects the user's visual acuity based on the user's visual acuity.

According to the present disclosure, it is possible to acquire a captured image at the user's viewpoint and dynamically control the focal length of the optical lens based on the distance calculated from the captured image.

As described above, according to the present disclosure, it is possible to perform more appropriate visual acuity correction for the user.

Note that the above effects are not necessarily limited, and any of the effects shown in the present specification, or other effects that can be grasped from the present specification, together with or in place of the above effects. May be played.

It is a perspective view showing an example of appearance of an optical control device concerning a 1st embodiment of this indication. It is the block diagram which showed the internal structure of the optical control apparatus which concerns on the same embodiment. It is explanatory drawing which showed the example of 1 structure of the optical lens which concerns on the same embodiment. It is the graph which showed an example of the relationship between correction visual acuity and required refractive power. It is the graph which showed an example of the correction | amendment relationship of the refractive power with respect to distance. It is explanatory drawing which showed an example of the image displayed on the optical lens which concerns on the embodiment. It is the flowchart figure which showed the operation example of the optical control apparatus which concerns on the same embodiment. FIG. 9 is a block diagram illustrating an internal configuration of an optical control device according to a second embodiment of the present disclosure. It is explanatory drawing which shows an example of control with respect to the optical lens of the control part which concerns on the same embodiment. FIG. 10 is a block diagram illustrating an internal configuration of an optical control device according to a third embodiment of the present disclosure. It is the graph which showed an example of the correction | amendment relationship of the refractive power with respect to illumination intensity. It is a block diagram showing the internal configuration of the optical control device concerning a 4th embodiment of this indication. It is explanatory drawing which showed the example of 1 structure of the optical lens which concerns on the same embodiment. It is explanatory drawing which showed the outline of the optical control apparatus which concerns on 5th Embodiment of this indication. It is explanatory drawing explaining the example of an image displayed on the information processing apparatus which communicates with the optical control apparatus which concerns on the embodiment. It is explanatory drawing explaining the example of an image displayed on the information processing apparatus which communicates with the optical control apparatus which concerns on the embodiment. It is explanatory drawing explaining the example of an image displayed on the information processing apparatus which communicates with the optical control apparatus which concerns on the embodiment. It is explanatory drawing explaining the example of an image displayed on the information processing apparatus which communicates with the optical control apparatus which concerns on the embodiment.

Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

The description will be made in the following order.
1. 1. First embodiment 1.1. Example of appearance of optical control device 1.2. Configuration example of optical control device 1.3. 1. Example of operation of optical control device Second Embodiment 2.1. 2. Configuration example of optical control device Third Embodiment 3.1. 3. Configuration example of optical control device Fourth Embodiment 4.1. 4. Configuration example of optical control device Fifth embodiment Summary

<1. First Embodiment>
[1.1. Appearance example of optical control unit]
First, an external appearance example of the optical control device 1 according to the first embodiment of the present disclosure will be described with reference to FIG. FIG. 1 is a perspective view illustrating an appearance example of the optical control device 1 according to the first embodiment of the present disclosure.

As illustrated in FIG. 1, the optical control device 1 according to the first embodiment of the present disclosure includes an optical lens 11, an imaging device 13, and a support member 15.

For example, as shown in FIG. 1, the optical control device 1 may be glasses equipped with a variable focus lens. However, the technology according to the present disclosure is not limited to the above examples. For example, the optical control device 1 may be a contact lens provided with a variable focus lens. The optical control device 1 does not include the optical lens 11 and the imaging device 13, acquires information from the external imaging device 13 through communication, and controls the focal length of the external optical lens 11 based on the acquired information. It may be a control device.

The optical lens 11 is a lens whose focal length can be changed. Further, the focal length of the optical lens 11 is controlled based on the distance between the target and the user calculated from the captured image acquired by the imaging device 13. Specifically, the optical control device 1 performs image processing on the captured image to calculate the distance between each of the objects captured by the user in the field of view and the user, and the focus of the optical lens 11 based on the calculated distance. Control the distance.

Note that the calculation of the distance between the target and the user and the control of the focal distance for the optical lens 11 by the optical control device 1 are executed in real time. However, the calculation of the distance between the target and the user and the control of the focal length with respect to the optical lens 11 by the optical control device 1 may be performed at an arbitrary timing according to a user instruction.

The optical lens 11 is, for example, a single variable focus lens having one variable focal length over the entire lens surface. Further, the optical lens 11 may be a lens whose lens surface is divided into a plurality of lens regions, and each lens region can independently change the focal length.

The imaging device 13 acquires an image corresponding to the visual field captured by the user. For example, the imaging device 13 is provided in the vicinity of the optical lens 11 and acquires an image corresponding to the visual field that the user is looking through the optical lens 11. The imaging device 13 is preferably installed in the vicinity of the optical lens 11 in order to acquire an image corresponding to the user's visual field.

Here, the imaging device 13 may not be provided in the optical control device 1 as long as an image corresponding to the visual field of the user can be acquired. For example, the imaging device 13 may be an imaging device attached to the user separately from the optical control device 1 or an imaging device possessed by the user, and the optical control device 1 includes these external imaging devices. A distance between each of the objects within the field of view captured by the user and the user may be calculated using the captured image.

The support member 15 is a structural member that supports the optical lens 11 and the imaging device 13. Specifically, the support member 15 holds the optical lens 11 at a position corresponding to both eyes of the user, and holds the imaging device 13 at a position where an image corresponding to the visual field of the user can be acquired. For example, when the optical control device 1 is spectacles including a variable focus lens, the support member 15 may be a frame of the spectacles.

In the above description, the optical control device 1 according to the first embodiment of the present disclosure has been described as calculating the distance between the target and the user from the image corresponding to the field of view of the user captured by the imaging device 13. The disclosed technology is not limited to such examples. For example, the optical control device 1 according to the first embodiment of the present disclosure irradiates a target with light having a predetermined wavelength until the irradiated light is reflected by the target and returns to the optical control device 1. The distance between the target and the user may be calculated by the ToF (Time-of-Flight) method for calculating the distance based on the time of the above.

[1.2. Configuration example of optical control device]
Next, a configuration example of the optical control device 1 according to the first embodiment of the present disclosure will be described with reference to FIGS. 2 to 6. FIG. 2 is a block diagram illustrating an internal configuration of the optical control device 1 according to the first embodiment of the present disclosure. FIG. 3 is an explanatory diagram showing a configuration example of the optical lens 11.

As illustrated in FIG. 2, the optical control device 1 according to the first embodiment of the present disclosure includes an optical lens 11, an imaging device 13, a distance calculation unit 101, a control unit 103, and a vision information storage unit 105. .

As described above, the optical lens 11 is a so-called variable focus lens that can change the focal length. The focal length of the optical lens 11 is controlled based on the distance between the target and the user calculated from the captured image acquired by the imaging device 13.

Here, the optical lens 11 capable of changing the focal length can be realized by, for example, a liquid lens using an electrowetting phenomenon, a liquid lens using a transparent elastic film, or a liquid crystal lens using liquid crystal. is there.

For example, the electrowetting phenomenon is a phenomenon in which when a voltage is applied to a droplet disposed on a hydrophobic dielectric film, the contact angle of the droplet changes due to the change in the hydrophobicity of the dielectric film. By using such an electrowetting phenomenon, the optical lens 11 capable of changing the focal length can be realized.

More specifically, two types of transparent liquids that are not mixed and have different refractive indexes are sealed in a region including an electrode with a hydrophobic coating. The two kinds of transparent liquids that are not mixed and have different refractive indexes are, for example, silicon oil having low conductivity and an aqueous solution having high conductivity. According to this configuration, the liquid lens is formed at the interface between the silicone oil and the aqueous solution by collecting the silicone oil on the hydrophobic coated electrode. Here, when a voltage is applied to the hydrophobic coated electrode, the hydrophobicity of the electrode changes, so that the interface shape between the silicon oil and the aqueous solution (that is, the shape of the liquid lens) changes. Therefore, when the electrowetting phenomenon is used, the shape of the liquid lens can be controlled by controlling the applied voltage, and the focal length can be controlled.

Further, the optical lens 11 whose focal length can be changed may be realized by using a liquid lens using a transparent elastic film. A liquid lens using a transparent elastic film is a lens in which liquid is sealed inside a lens-shaped structure formed of a transparent elastic film, and the focal length is controlled by changing the external shape of the liquid lens. can do.

For example, a lens shape formed of a transparent elastic film can change the volume inside the lens-shaped structure by injecting or discharging a liquid into the structure. Thereby, the external shape of the liquid lens can be changed and the focal length can be controlled.

Further, for example, a liquid lens having a substantially hemispherical shape in which a liquid is sealed with a transparent elastic thin film made of parylene (registered trademark), which is a paraxylylene polymer, is formed on a transparent electrode formed on a glass substrate, and the liquid lens A metal thin film is formed thereon. Here, when a voltage is applied between the transparent electrode and the metal thin film, a strong electrostatic force acts particularly on the outer periphery of the liquid lens where the distance between the two is short, and the parylene thin film is drawn toward the glass substrate side. At this time, since the volume of the liquid does not change, the liquid moves to the upper side of the liquid lens, and the parylene thin film changes to a more raised lens shape. Thereby, the external shape of the liquid lens may be changed to control the focal length.

Furthermore, the optical lens 11 whose focal length can be changed may be realized by using a liquid crystal lens using liquid crystal. Specifically, in a liquid crystal lens in which liquid crystal is enclosed in a lens-shaped space, the apparent refractive index of the liquid crystal can be changed by adjusting the applied voltage. Accordingly, the focal length can be controlled by changing the refractive index of the liquid crystal lens by controlling the voltage applied to the liquid crystal.

The optical lens 11 may be formed by a single variable focus lens, or may be formed by combining a plurality of lenses including at least one variable focus lens in series in the light incident direction.

For example, the optical lens 11 may be a lens in which a lens for correcting myopia or hyperopia and a lens for correcting astigmatism are combined in series in the incident direction of light. Here, astigmatism is a state in which the refractive power of the eye varies depending on the angle, and is defined by the astigmatism power D _cyl and the astigmatism angle θ. Therefore, for example, a lens for correcting astigmatism has a refractive power only in one direction and has a refractive power only in one direction of a cylindrical liquid lens that can rotate according to the astigmatism angle θ or an astigmatism angle θ. This is realized by a liquid crystal lens in which the orientation of the liquid crystal is controlled. In the case of a liquid crystal lens, the function of a variable focus lens for correcting myopia or hyperopia and the function of a lens for correcting astigmatism can be realized by a single lens.

Further, the lens surface of the optical lens 11 may be divided into a plurality of lens regions. Specifically, as shown in FIG. 3, the lens surface of the optical lens 11 may be divided into rectangular lens regions 111. Each lens region 111 is provided such that the focal length can be controlled independently of each other. Note that the shape of the lens region 111 on the lens surface of the optical lens 11 is not limited to the rectangular shape shown in FIG. 3, and may be a triangular shape or a hexagonal shape.

The imaging device 13 acquires an image corresponding to the visual field captured by the user as described above. Specifically, the imaging device 13 includes an imaging lens and an imaging element. The imaging device 13 can acquire an image by photoelectrically converting light from a subject incident through an imaging lens by an imaging device such as a CMOS image sensor or a CCD image sensor.

The distance calculation unit 101 performs image processing on the captured image acquired by the imaging device 13 and calculates the distance between the object captured in the captured image and the user.

For example, the distance calculation unit 101 calculates depth information from the captured image using a technique for generating a three-dimensional image having stereoscopically viewable depth information from the two-dimensional image, and converts the depth information into distance information for the user. May be.

Specifically, the distance calculation unit 101 generates a right-eye image and a left-eye image that are stereoscopically viewable in accordance with the intensity of the luminance differential signal by performing luminance differentiation on the captured image acquired by the imaging device 13. The distance information between the target and the user may be calculated from the parallax information of the generated right-eye image and left-eye image. Further, the distance calculation unit 101 may perform local or global depth estimation on the captured image acquired by the imaging device 13 and calculate distance information between the target and the user from the estimated depth information.

When using such a method of calculating depth information from a single two-dimensional image and converting the depth information into distance information between the target and the user, the optical control device 1 is obtained from one imaging device 13. The distance between the target and the user can be calculated using one captured image. Therefore, the optical control device 1 is more preferable because it is not necessary to prepare a plurality of imaging devices.

In addition, the distance calculation unit 101 acquires, for example, captured images from a plurality of imaging devices 13 and uses a stereo matching method or the like for the plurality of captured images, and distance information between the target captured in the captured images and the user. May be calculated. Specifically, the distance calculation unit 101 determines a correspondence relationship between objects captured between the captured images acquired from the plurality of imaging devices 13. In addition, the distance calculation unit 101 uses the amount of deviation (parallax) between captured images at a target position in a correspondence relationship and the positional relationship of the plurality of imaging devices 13, so that the target captured in the captured image and the user Can be calculated.

According to the distance calculation unit 101 that calculates the distance between the target and the user from such a captured image, the optical control device 1 also applies to the target that is not being watched by the user in addition to the target that is being watched by the user. Can be calculated. Thereby, since the optical control apparatus 1 can control the focal distance of the optical lens 11 based on the distance between the entire field of view of the user and the user, more accurate visual acuity correction can be performed on the user. .

The distance calculation unit 101 may calculate the distance between the target and the user by another method without using the captured image acquired by the imaging device 13. For example, the distance calculation unit 101 may calculate the distance between the target and the user by the ToF method. Specifically, the optical control device 1 includes a light source that emits light of a predetermined wavelength and a detector that detects light emitted by the light source, and the light emitted from the light source is reflected by the target. Then, the distance between the target and the user may be calculated based on the time until returning to the detector.

Further, the distance calculation unit 101 may divide the captured image acquired by the imaging device 13 into a plurality of regions and calculate the distance between the target and the user for each of the divided regions. Here, when the lens surface of the optical lens 11 is divided into a plurality of lens regions and each lens region can independently control the focal length, the optical control device 1 performs more appropriate visual acuity correction for the user. Can be applied.

Specifically, the optical control device 1 divides the captured image into a plurality of regions so as to correspond to the divided lens regions of the optical lens 11, and in each of the divided captured image regions, the target and the user The distance is calculated. The optical control device 1 may control the focal length of the divided lens area based on the distance between the target and the user calculated in each of the divided captured image areas. According to this, the optical control device 1 can individually correct the visual acuity according to the distance between the target and the user in each of the divided lens regions of the optical lens 11. That is, the optical control apparatus 1 can perform appropriate visual acuity correction according to the distance between the target and the user in the region over the entire visual field captured by the user.

The control unit 103 controls the focal length of the optical lens 11 based on the distance between the object calculated by the distance calculation unit 101 and the user. Specifically, the control unit 103 acquires information about the user's naked eye vision and information about the corrected visual acuity from the visual acuity information storage unit 105, and the refractive power of the optical lens 11 necessary to make the user's visual acuity a corrected visual acuity. Calculate D _sph and D _cyl . Note that D _sph is the refractive power of the lens for correcting myopia or hyperopia, and D _cyl is the refractive power of the lens for correcting astigmatism. Further, the control unit 103 calculates a correction value D _d of D _sph based on the distance based on the distance between the target calculated by the distance calculation unit 101 and the user. Furthermore, the control unit 103 controls the focal length of the optical lens 11 based on the calculated refractive powers D _sph , D _cyl , and D _d .

Here, with reference to FIG. 4 and FIG. 5, the calculation method of the refractive power of the optical lens 11 executed by the control unit 103 will be described in more detail. FIG. 4 is a graph showing an example of the relationship between the corrected visual acuity and the necessary refractive power, and FIG. 5 is a graph showing an example of the correction relationship of the refractive power with respect to the distance.

First, a method of calculating the refractive power D _sph of the lens for correcting myopia or hyperopia will be described with reference to FIG. In the graph shown in FIG. 4, the y axis represents the user's visual acuity, and the x axis represents the refractive power D corresponding to the user's visual acuity. The graph shown in FIG. 4 shows a tendency that the absolute value of the refractive power increases as the user's visual acuity decreases, and the y-axis intercept at which the refractive power becomes 0 is corrected visual acuity V _t (target visual acuity after correction). It is.

Here, when the user's naked eye acuity is V _c , the refractive power necessary to change the user's visual acuity to the corrected visual acuity V _t is the x-coordinate D _sphag when y = V _c in the graph of FIG. . When the user desires to set the corrected visual acuity to a visual acuity V _re lower than the corrected visual acuity V _{t, the} refractive power D _sph necessary for obtaining the corrected visual acuity V _re is y = V _c . and x-coordinate of the difference a is _{D Sphre} the x-coordinate in the case of y _{= V re.} Note that the sign of the refractive power D _sph of the lens for correcting myopia is negative, and the sign of the refractive power D _sph of the lens for correcting hyperopia is positive.

The relationship between the corrected visual acuity shown in FIG. 4 and the necessary refractive power varies among individuals. Therefore, it is preferable that the optical control device 1 performs visual acuity measurement for each user and prepares a graph shown in FIG. 4 in advance. Further, the relationship between the corrected visual acuity for a general user and the necessary refractive power may be stored in the optical control device 1 in advance.

Further, the refractive power D _cyl of the astigmatic lens can be calculated by the same method as D _sph .

Next, referring to FIG. 5, the distance calculation method of the correction value D _d by explaining. In the graph shown in FIG. 5, the y-axis is the refractive power, and the x-axis represents the distance d between the target and the user. Further, the graph shown in FIG. 5 is divided into a case where the user is myopic, a case of hyperopia, and a case of myopia and hyperopia. The threshold distance T is a threshold for determining whether or not to perform correction based on the distance, and an appropriate distance can be set as appropriate.

Here, when the user is myopic, the sign of the refractive power D _sphdis of the lens for correcting myopia is negative, and the user can easily see near distance with the naked eye. Therefore, D _d increases so as to cancel out D _sphdis as the distance between the target and the user is closer to the threshold distance T, and is corrected so as not to be _{overcorrected} . That is, D _d increases so that D _d = −D _sphdis when d = 0. Thereby, the control part 103 can control the refractive power of the optical lens 11 so that the degree of visual acuity correction becomes low with respect to a near-sighted user at a short distance.

In addition, when the user is hyperopic, the sign of the refractive power D _sread of the lens for correcting hyperopia is positive, and the user can easily see far distances with the naked eye. For this reason, D _d is corrected so that the absolute value increases so as to cancel out D _spread and the _{overcorrection} does not occur as the distance between the target and the user becomes closer to the threshold distance T. That, _{D d} is the absolute value such that _D d _{= -D sphread} at d = T increases. Thereby, the control part 103 can control the refractive power of the optical lens 11 with respect to the user of hyperopia so that the degree of visual acuity correction becomes low, so that it is a long distance.

Furthermore, when the user is nearsighted and farsighted, the user is difficult to see both at long distance and near distance. Therefore, for example, when the refractive power of the lens for correcting hyperopia and myopia is D _sphdis (sign is negative), D _d cancels D _sphdis as the distance between the target and the user is closer to the threshold distance T. So as to increase. Further, D _d increases so that D _d = −2D _sphdis when d = 0, and the sign of “D _d + D _sphdis ” is changed from negative to positive at a predetermined distance t. That is, as _Dd increases, the optical lens 11 changes from a myopia correction lens (refractive power is negative) to a hyperopia correction lens (refractive power is positive). According to this configuration, the control unit 103 can perform vision correction for correcting myopia at a long distance and correct vision for correcting hyperopia at a short distance for a myopic and hyperopic user.

Note that the correction relationship for calculating the correction value D _d based on the distance shown in FIG. 5 has individual differences as in D _sph . Therefore, it is preferable that the optical control device 1 performs visual acuity measurement for each user and prepares the graph shown in FIG. 5 in advance. Further, it is preferably stored in the optical control device 1. Further, a graph for calculating the correction value D _d for a general user may be stored in the optical control device 1 in advance.

The visual acuity information storage unit 105 stores information related to the user's visual acuity. Specifically, the visual acuity information storage unit 105 stores the user's naked eye visual acuity and corrected visual acuity (target visual acuity after correction). The visual acuity information storage unit 105 may store in advance the refractive power D _{sph of the} lens for correcting myopia or hyperopia, the refractive power D _{cyl of the} lens for correcting astigmatism, and the astigmatism angle θ, which are correction values of the user's visual acuity. . Furthermore, the visual acuity information storage unit 105 calculates the relationship between the corrected visual acuity and the refractive power shown in FIG. 4 for calculating D _sph , and the refractive power correction relationship for the distance shown in FIG. 5 for calculating D _d . May be stored.

According to the above configuration, the optical control device 1 according to the first embodiment of the present disclosure calculates the distance between the target and the user based on the captured image, so that the distance that is not observed by the user is also determined. Information can be acquired. Therefore, the optical control device 1 according to the first embodiment of the present disclosure can dynamically control the focal length of the optical lens 11 based on the distance between the entire field of view of the user and the user. Therefore, the optical control device 1 according to the first embodiment of the present disclosure can perform more accurate visual acuity correction on the user.

Here, the optical control device 1 according to the first embodiment of the present disclosure may further include an image generation unit. For example, the optical control device 1 may include an image generation unit that generates an image for transmitting information to the user, and display the image generated by the image generation unit on the optical lens 11. Here, FIG. 6 is an explanatory diagram showing an example of an image displayed on the optical lens 11.

For example, the image generation unit may generate an image 113 displayed on at least one of the optical lenses 11 as shown in FIG. Specifically, the image 113 includes information on the user's visual acuity such as the refractive power, the user's naked eye acuity, and the corrected visual acuity, and information on the optical control device 1 such as the battery remaining amount. Information may be transmitted. In addition, the display on the optical lens 11 of the image generated by the image generation unit can be realized by using, for example, projection by a half mirror.

Note that the image generated by the image generation unit may be displayed on either one selected by the user of the optical lens 11 or may be displayed on both of the optical lenses 11 with a preset parallax.

According to this configuration, the user can confirm information regarding his or her visual acuity and information regarding the optical control device 1 without using a separate display device or the like.

[1.3. Example of operation of optical control device]
Subsequently, an operation of the optical control device 1 according to the first embodiment of the present disclosure will be described with reference to FIG. FIG. 7 is a flowchart illustrating an operation example of the optical control device 1 according to the first embodiment of the present disclosure.

As shown in FIG. 7, first, the imaging device 13 acquires a captured image corresponding to the user's viewpoint (S101). Next, the distance calculation unit 101 calculates the distance between the object captured in the captured image and the user based on the acquired captured image (S103). Subsequently, the control unit 103 acquires information on the visual acuity before correction (that is, naked eye visual acuity) and the visual acuity after correction (that is, corrected visual acuity) from the visual acuity information storage unit 105 (S105).

Also, the control unit 103 calculates the refractive power of the optical lens 11 necessary for correcting the user's visual acuity to the corrected visual acuity (S107). Further, the control unit 103 corrects the refractive power of the optical lens 11 based on the distance between the target calculated by the distance calculation unit 101 and the user (S109). Subsequently, the control unit 103 controls the focal length of the optical lens 11 so that the corrected refractive power is obtained (S111).

With the above operation, the optical control device 1 according to the first embodiment of the present disclosure calculates the distance between the target captured in the captured image and the user based on the captured image, and the calculated target and the user Based on the distance, the focal length of the optical lens 11 can be controlled. According to this, the optical control device 1 according to the first embodiment of the present disclosure can perform more accurate visual acuity correction on the user.

<2. Second Embodiment>
[2.1. Configuration example of optical control device]
Next, the optical control device 2 according to the second embodiment of the present disclosure will be described with reference to FIGS. 8 and 9. The optical control device 2 according to the second embodiment of the present disclosure includes an attention point detection function that detects a user's attention point, and corrects the visual acuity with respect to the user based on the distance from the target that the user is gazing at. Can be applied. Accordingly, the optical control device 2 according to the second embodiment of the present disclosure can perform visual acuity correction optimized for a target that the user is gazing at, so that the visual acuity correction more appropriate for the user can be performed. Can be applied.

Hereinafter, a configuration example of the optical control device 2 according to the second embodiment of the present disclosure will be described with reference to FIGS. 8 and 9. FIG. 8 is a block diagram illustrating an internal configuration of the optical control device 2 according to the second embodiment of the present disclosure, and FIG. 9 is an explanatory diagram illustrating an example of control of the optical lens 21 by the control unit 203. .

As illustrated in FIG. 8, the optical control device 2 according to the second embodiment of the present disclosure includes an optical lens 21, an imaging device 23, a distance calculation unit 201, a control unit 203, and a visual acuity information storage unit 205. The attention point detecting unit 207 is provided.

Here, the optical lens 21, the imaging device 23, and the visual acuity information storage unit 205 are the same as the optical lens 11, the imaging device 13, and the visual acuity information storage unit 105 described in the first embodiment. The description in is omitted. In the following, the second embodiment will be described focusing on differences from the first embodiment of the present disclosure.

The attention point detection unit 207 detects the attention point that the user is gazing in the visual field captured by the user. Specifically, the point-of-interest detection unit 207 detects a user's line of sight or a point of interest that the user is gazing from the behavior of the user's eyeball, and in the captured image acquired by the imaging device 23, the target is gazed by the user. Detect if you are doing.

For example, the attention point detection unit 207 acquires an image including the user's eyeball, and detects a user's eye direction or attention point by detecting a cornea reflection image (Purkinje image) and a pupil center of gravity of the user's eyeball from the image. May be. Specifically, the point-of-interest detection unit 207 irradiates the user's eyeball with light having a predetermined wavelength, and acquires a Purkinje image for the irradiated light. Further, the attention point detection unit 207 acquires the pupil center of gravity from the image of the user's eyeball.

Here, since the surface of the cornea is a substantially spherical body, the position of the Purkinje image is almost constant regardless of the direction of the user's line of sight. On the other hand, the center of the pupil moves according to the direction of the user's line of sight. Therefore, the attention point detection unit 207 can detect the direction of the user's line of sight by calculating the distance from the center of the pupil to the center point of the Purkinje image. Furthermore, the attention point detection unit 207 can detect the attention point of the user by comparing the detected line-of-sight direction of the user with the captured image acquired by the imaging device 23.

Further, the attention point detection unit 207 generates a stereo image from the captured image acquired by the imaging device 23 using a technique for generating a 3D image having stereoscopically viewable depth information from the 2D image, and the stereo image The user's attention point may be estimated using. Specifically, as executed by the distance calculation unit 201 in the first embodiment, a right-eye image and a left-eye image are generated from the captured image, and image feature amounts are generated for the generated right-eye image and left-eye image. The attention point of the user may be detected by performing detection and image recognition.

The distance calculation unit 201 calculates the distance between the target corresponding to the user's attention point detected by the attention point detection unit 207 and the user. As a method for calculating the distance between the target corresponding to the user's attention point and the user, the same method as in the first embodiment may be used. In addition, a method of calculating the distance between the gazing point and the user by detecting the amount of convergence of the user's eyeball described below, and a gazing point by detecting the similarity of stereo images acquired from a plurality of imaging devices. It is also possible to use a method for calculating the distance between the user and the user. However, it is more preferable to use the calculation method described in the first embodiment because the distance between the target corresponding to the user's attention point and the user can be calculated more accurately.

For example, when the distance between the point of interest and the user is calculated by detecting the amount of convergence of the user's eyeball, the distance calculation unit 201 acquires an image including the user's eyeball and detects the user's pupil position. Here, the user's eyeball performs an eyeball movement called a vergence movement according to the distance from the point of interest. Specifically, the vergence movement means that when the attention point is close to the user, the pupils of both eyes of the user are inward, and when the attention point is far from the user, both eyes of the user are Represents eye movements in which the pupil moves outward. Therefore, the distance calculation unit 201 can calculate the distance between the user corresponding to the user's attention point and the user by detecting the distance between the pupils of both eyes of the user.

When calculating the distance between the target corresponding to the user's attention point and the user using the similarity of stereo images acquired from a plurality of imaging devices, the distance calculation unit 201 detects the user detected by the attention point detection unit 207. The images on the line of sight are acquired by a plurality of imaging devices. Here, since there is a target that the user is gazing at the user's attention point, the stereo images acquired from the plurality of imaging devices include the gazing target and have high similarity. On the other hand, since there is no target at a position that is not the user's attention point, stereo images acquired from a plurality of imaging devices have low similarity. Therefore, by comparing the similarity of stereo images acquired from a plurality of imaging devices, the distance calculation unit 201 can determine which target on the line of sight the user is gazing at. Therefore, the distance calculation unit 201 can calculate the distance between the target corresponding to the user's attention point and the user.

The control unit 203 controls the focal length of the optical lens 21 based on the distance between the target corresponding to the user's attention point calculated by the distance calculation unit 201 and the user. Specifically, the control unit 203 acquires information about the user's naked eye vision and information about the corrected visual acuity from the visual information storage unit 205, and the optical lens 21 necessary for making the corrected user's visual acuity the corrected visual acuity. The refractive powers D _sph and D _cyl are calculated. Further, the control unit 203 calculates a correction value D _d based on the distance based on the distance between the target corresponding to the user's attention point calculated by the distance calculation unit 201 and the user. Further, the control unit 203 controls the focal length of the optical lens 21 based on the calculated refractive powers D _sph , D _cyl , and D _d .

Therefore, in the second embodiment of the present disclosure, the control unit 203 calculates the refractive power correction value D _d of the optical lens 21 based on the distance between the target corresponding to the user's attention point and the user. Different from the first embodiment.

Further, when the lens surface of the optical lens 21 is divided into a plurality of lens regions 211 and each lens region can independently control the focal length, the control unit 203 controls the lens region 213 through which the line of sight of the user 27 passes. Only the focal length may be controlled. Specifically, as illustrated in FIG. 9, when the attention point detection unit 207 detects that the user 27 is gazing at the attention point 25, the control unit 203 displays the line of sight of the user 27 and the optical lens. The lens area 213 through which the line of sight of the user 27 passes is determined by comparing with the lens surface 21. The control unit 203 controls only the focal length of the lens region 213 through which the line of sight of the user 27 passes among the plurality of lens regions 211 existing on the lens surface of the optical lens 21. According to this configuration, the optical control device 2 can suppress power consumption while performing the minimum necessary visual acuity correction for the user 27.

According to the above configuration, the optical control device 2 according to the second embodiment of the present disclosure detects the user's attention point, and the optical lens 21 based on the distance between the object being watched by the user and the user. Can be controlled dynamically. Thereby, the optical control device 2 according to the second embodiment of the present disclosure can perform visual acuity correction optimized for a target that the user is gazing at.

<3. Third Embodiment>
[3.1. Configuration example of optical control device]
Next, the optical control device 3 according to the third embodiment of the present disclosure will be described with reference to FIGS. The optical control device 3 according to the third embodiment of the present disclosure includes an illuminance measurement function that measures the illuminance of an environment where the user is present, and corrects apparent myopia (nighttime myopia) that occurs in an environment with low illuminance. Vision correction can be applied to the user.

Specifically, in an environment with low illuminance, the human eye becomes myopic than in an environment with high illuminance. This is because, in an environment where the illuminance is low, the pupil expands in order to take in more light than in an environment where the illuminance is high, and light entering the cornea and the lens of the eye becomes thicker. That is, as the light entering the cornea and the crystalline lens of the human eye becomes thicker, the influence of the spherical aberration of the cornea and the crystalline lens increases, and an image is formed at a more myopic refractive position. Therefore, the lower the illuminance in the environment, the more the human eye is affected as if it seemed to be myopic.

Therefore, the optical control device 3 according to the third embodiment of the present disclosure corrects apparent myopia (nighttime myopia) that occurs in an environment with low illuminance by measuring the illuminance of the environment where the user is present, It aims at giving a more suitable visual acuity correction with respect to a user.

Hereinafter, a configuration example of the optical control device 3 according to the third embodiment of the present disclosure will be described with reference to FIGS. 10 and 11. FIG. 10 is a block diagram illustrating an internal configuration of the optical control device 3 according to the third embodiment of the present disclosure.

As illustrated in FIG. 10, the optical control device 3 according to the third embodiment of the present disclosure includes an optical lens 31, an imaging device 33, a distance calculation unit 301, a control unit 303, and a visual acuity information storage unit 305. And an illuminance measuring unit 309.

Here, regarding the optical lens 31, the imaging device 33, the distance calculation unit 301, and the visual acuity information storage unit 305, the optical lens 11, the imaging device 13, the distance calculation unit 101, and the visual acuity information storage described in the first embodiment. Since it is the same as that of the part 105, description here is abbreviate | omitted. In the following, the third embodiment will be described focusing on differences from the first embodiment of the present disclosure.

The illuminance measuring unit 309 measures the illuminance in the environment where the user is present. Specifically, the illuminance measurement unit 309 includes a photometer or an illuminometer, and measures the illuminance of the environment where the user is present. Here, the illuminance measurement unit 309 may perform illuminance measurement in an environment where the user is present in real time, or may be performed at an arbitrary timing based on a user instruction.

For example, the illuminance measuring unit 309 can measure the illuminance by converting light incident on a light receiving element such as a Si photodiode into a current by a photoelectric effect. Further, the illuminance measurement unit 309 may measure the illuminance using a photodiode or a photoresist using a material other than Si.

Note that the illuminance measurement unit 309 preferably corrects the measured illuminance so that the illuminance measured by a Si photodiode or the like matches the illuminance felt by a person (that is, the illuminance corrected by visual sensitivity). For example, when the illuminance measurement unit 309 measures the illuminance using a Si photodiode, the detection wavelength band of the Si photodiode extends to the infrared band in addition to the visible light band, so that it is higher than the illuminance felt by humans. It may be measured brightly. Therefore, the illuminance measurement unit 309 further includes a sub-photodiode that detects the infrared band, and can divide the detection output of the sub-photodiode from the detection output of the Si photodiode to measure only the illuminance due to light in the visible light band. It is preferable to do so.

As described in the first embodiment, the control unit 303 controls the refractive powers D _sph and D _{cyl of the} optical lens 31 necessary for the corrected visual acuity of the user to be the corrected visual acuity, and the relationship between the target and the user. distance to calculate a correction value D _d by. In addition, the control unit 303 calculates a correction value D ₁ based on illuminance. Furthermore, the control unit 303 controls the focal length of the optical lens 31 by the calculated refractive powers D _sph , D _cyl , D _d , and D _l .

That is, the third embodiment of the present disclosure is different from the first embodiment in that the control unit 303 further controls the focal length of the optical lens 31 based on the illuminance.

Here, with reference to FIG. 11, the method by which the control unit 303 calculates the correction value D ₁ based on the illuminance will be described in more detail. FIG. 11 is a graph showing an example of the correction relationship of the refractive power with respect to the illuminance.

In the graph shown in FIG. 11, the y-axis is the refractive power, and the x-axis represents the illuminance l in the environment where the user is present. Note that the x-axis is a logarithmic axis, and the threshold illuminance L is a threshold for determining whether or not to correct by illuminance. The graph shown in FIG. 11 shows a tendency for the amount of correction for myopia to increase as the illuminance of the environment in which the user is present decreases, regardless of whether the user is myopia or hyperopia. Specifically, as the illuminance in the environment where the user is present decreases, the absolute value of the refractive power tends to increase on the negative side (the myopia correction side), and D _l = D _lth when l = 0. The control unit 303 can calculate the refractive power correction amount D ₁ for the illuminance and control the focal length of the optical lens 31 by using the refractive power correction relationship for the illuminance shown in FIG.

Note that the correction relationship for calculating the correction value D _l based on the illuminance in the environment where the user is shown in FIG. 11 has individual differences as in D _sph and D _d . Therefore, it is preferable that the optical control device 3 performs visual acuity measurement for each user and prepares a graph shown in FIG. 11 in advance. Further, the relationship between the corrected visual acuity for a general user and the necessary refractive power may be stored in the optical control device 3 in advance.

According to the above configuration, the optical control device 3 according to the third embodiment of the present disclosure measures apparent illuminance (nighttime myopia) that occurs in a low illuminance environment by measuring the illuminance in the environment where the user is present. ) Can be dynamically applied to the user. Thereby, the optical control device 3 according to the third embodiment of the present disclosure can perform appropriate vision correction on the user in consideration of illuminance.

<4. Fourth Embodiment>
[4.1. Configuration example of optical control device]
Subsequently, the optical control device 4 according to the fourth embodiment of the present disclosure will be described with reference to FIGS. 12 and 13. The optical control device 4 according to the fourth embodiment of the present disclosure includes a visual acuity measurement function that measures the visual acuity of the user, and can apply visual acuity correction optimized for the latest measured visual acuity to the user.

Hereinafter, a configuration example of the optical control device 4 according to the fourth embodiment of the present disclosure will be described with reference to FIGS. 12 and 13. FIG. 12 is a block diagram illustrating an internal configuration of the optical control device 4 according to the fourth embodiment of the present disclosure, and FIG. 13 is an explanatory diagram illustrating a configuration example of the optical lens 41.

As illustrated in FIG. 12, the optical control device 4 according to the fourth embodiment of the present disclosure includes an optical lens 41, an imaging device 43, a distance calculation unit 401, a control unit 403, and a visual acuity information storage unit 405. And a visual acuity measurement unit 411.

Here, regarding the optical lens 41, the imaging device 43, the distance calculation unit 401, and the visual acuity information storage unit 405, the optical lens 11, the imaging device 13, the distance calculation unit 101, and the visual acuity information storage unit described in the first embodiment. Since it is the same as 105, description here is abbreviate | omitted. In the following, the fourth embodiment will be described focusing on differences from the first embodiment of the present disclosure.

The visual acuity measurement unit 411 measures the visual acuity of the user. Specifically, the visual acuity measurement unit 411 measures the user's naked eye visual acuity. Information relating to the measured myopia or hyperopia power, astigmatism power, and astigmatism angle is stored in the visual acuity information storage unit 405.

For example, the visual acuity measurement unit 411 may measure the user's naked eye visual acuity by irradiating the fundus of the user with an infrared light ring pattern and analyzing the reflection pattern from the fundus. Specifically, when an infrared ring pattern is irradiated on the fundus of the user, the size of the image formed on the fundus varies depending on the user's naked eye vision, and in the case of myopia, a larger ring pattern than usual In the case of hyperopia, the ring pattern is smaller than usual. In the case of astigmatism, an elliptical pattern extending in a direction perpendicular to the astigmatism angle is obtained. The visual acuity measurement unit 411 measures the naked eye visual acuity of the user by acquiring and analyzing these reflection patterns from the fundus with an imaging device or the like, and acquires information on myopia or hyperopic power, astigmatism power, and astigmatism angle. be able to.

Note that the visual acuity measurement unit 411 preferably measures the user's visual acuity at predetermined time intervals. For example, the user's visual acuity changes every moment due to time, fatigue, and the like even during the day. Therefore, it is preferable that the visual acuity measurement unit 411 measures the visual acuity of the user again every predetermined time. For example, the visual acuity measurement unit 411 may measure the user's visual acuity every life time zone such as morning, noon, and night, or may measure the user's visual acuity every fixed time such as 4 hours. The visual acuity measurement unit 411 may measure the visual acuity of the user in real time, or may measure the visual acuity of the user at an arbitrary timing according to an instruction from the user.

Further, the visual acuity measurement unit 411 may create a calibration curve for calculating the refractive power of the optical lens 41 shown in FIGS. 4, 5 and 11 based on the measured visual acuity of the user. According to this configuration, the optical control device 4 can perform more optimized visual acuity correction for each user.

As described in the first embodiment, the control unit 403 determines the refractive powers D _sph and D _{cyl of the} optical lens 41 necessary for the corrected visual acuity of the user to be corrected visual acuity, and the relationship between the target and the user. distance to calculate a correction value D _d by. Further, the control unit 403 controls the focal length of the optical lens 41 based on the calculated refractive powers D _sph , D _cyl , and D _d .

Here, the control unit 403 determines the most recent user measured by the visual acuity measurement unit 411 when calculating the refractive powers D _sph and D _cyl of the optical lens 41 necessary for correcting the corrected visual acuity to the corrected visual acuity. Use the visual acuity. According to this configuration, the control unit 403 can control the focal length of the optical lens 41 so as to keep the corrected visual acuity constant in accordance with the user's visual acuity that changes every day.

In other words, the fourth embodiment of the present disclosure further includes a visual acuity measurement unit 411, and the control unit 403 controls the focal length of the optical lens 41 based on the visual acuity of the latest user measured by the visual acuity measurement unit 411. This is different from the first embodiment.

According to the above configuration, the optical control device 4 according to the fourth embodiment of the present disclosure measures the user's visual acuity in real time or every predetermined time, thereby reflecting the visual acuity that reflects the change in the visual acuity of the user Correction can be performed. Therefore, the optical control device 4 according to the fourth embodiment of the present disclosure can detect a change in the visual acuity of the user and can control the focal length of the optical lens 41 so that the corrected visual acuity is always constant. It is possible to correct the visual acuity more appropriate for the user.

Here, when the optical control device 4 according to the fourth embodiment of the present disclosure further includes an image generation unit, the optical control device 4 generates an image for guiding visual acuity measurement by the image generation unit, and the optical lens 41. May be projected onto the screen. Here, FIG. 13 is an explanatory diagram showing an example of an image displayed on the optical lens 41.

For example, the image generation unit may generate an image 411A for guiding visual acuity measurement displayed on at least one of the optical lenses 41 as shown in FIG. Specifically, when the eye focus adjustment function works or the line of sight moves during visual acuity measurement, accurate measurement cannot be performed, so the image generation unit looks at a distant view (for example, a distant view of 10 m or more). It is also possible to generate a phrase such as “Please look at a landscape 10 m or more away in the + direction”. Further, the image generation unit may generate a cross or an X-shaped mark in order to make the user gaze at one point in the distant view.

The image generated by the image generation unit may be displayed on either one selected by the user of the optical lens 41, or may be displayed on both of the optical lenses 41 with a preset parallax. In addition, when the optical control device 4 includes still another output device such as an audio output device, the optical control device 4 can also guide visual acuity measurement to the user using audio or the like.

According to this configuration, since the optical control device 4 can instruct and guide the user, it can perform more accurate visual acuity measurement. In addition, the optical control device 4 can reduce the complexity of the user for visual acuity measurement.

<5. Fifth Embodiment>
Next, the optical control device 5 according to the fifth embodiment of the present disclosure will be described with reference to FIGS. The optical control device 5 according to the fifth embodiment of the present disclosure has a communication function with an external information processing device, and can transmit and receive information to and from the external information processing device.

First, an outline of the optical control device 5 according to the fifth embodiment of the present disclosure will be described with reference to FIG. FIG. 14 is an explanatory diagram illustrating an outline of the optical control device 5 according to the fifth embodiment of the present disclosure.

As shown in FIG. 14, the optical control device 5 according to the fifth embodiment of the present disclosure has a function of communicating with an external information processing device 53. Specifically, the optical control device 5 transmits and receives information to and from the information processing device 53 using a communication function. The information processing device 53 is, for example, a mobile phone, a smartphone, a tablet terminal, or the like.

For example, the optical control device 5 transmits information on the user's visual acuity such as the refractive power, the user's naked eye sight, and the corrected visual acuity, and information on the optical control device 5 such as the remaining battery level to the information processing device 53. Such information may be transmitted to the user via the device 53. In addition, the optical control device 5 may receive information on the user's visual acuity such as the visual acuity measurement result and the refractive power of the optical lens 51 from the information processing device 53 and may use it for controlling the focal length of the optical lens 51.

Subsequently, referring to FIGS. 15 to 18, the input / output of information executed by the optical control device 5 according to the fifth embodiment of the present disclosure will be described using an image example displayed by the information processing device 53. This will be specifically described. Here, FIG. 15 to FIG. 18 are explanatory diagrams for explaining examples of images displayed on the information processing device 53 communicating with the optical control device 5.

Note that the image displayed by the information processing device 53 may be generated by the optical control device 5 according to the fifth embodiment of the present disclosure, or may be generated by the information processing device 53.

For example, the optical control device 5 may display the input image 531 shown in FIG. 15 on the information processing device 53 and allow the user to input a prescription for glasses. Here, in the input image 531, S (SPH) represents the refractive power of hyperopia or myopia correction, C (CYL) represents the refractive power of astigmatism correction, and A (AX) represents the astigmatism angle. The user inputs the information of these S (SPH), C (CYL), and A (AX), which are spectacle prescriptions, into the input image 531 and transmits the information from the information processing device 53 to the optical control device 5, so that the optical The optical control device 5 can be used without visual acuity measurement by the control device 5.

Also, the optical control device 5 may indicate the refractive power of the optical lens 51 to the user, for example, by causing the information processing device 53 to display the input image 533 shown in FIG. The optical control device 5 may be capable of adjusting the refractive power of the optical lens 51 by a user input. Here, in the input image 533, the refractive power of the hyperopia or myopia correction of each of the user's right eye and left eye is displayed, and the user adjusts the refractive power of the optical lens 51 by using the respective adjustment knobs 533A and 533B. Is possible.

Specifically, the input image 533 indicates that the refractive power of the optical lens 51 of the user's right eye is “−1.0D” and the refractive power of the optical lens 51 of the left eye is “−1.5D”. Has been. “D” is a unit (diopter) representing the refractive power of a lens or the like, and is represented by the reciprocal of the focal length with respect to 1 m. The user can manually control the focal length of the optical lens 51 by moving the adjustment knobs 533A and 533B and inputting the refractive power of the optical lens 51 of the right eye or left eye into the input image 533.

When manual adjustment of the focal length of the optical lens 51 by the user is performed, the optical control device 5 stores the manual adjustment result of the focal length by the user and refers to the subsequent control of the focal length of the optical lens 51. May be. For example, the optical control device 5 stores information such as the distance to the target at the time of adjustment, the illuminance of the environment, the user's visual acuity, and the time zone in accordance with the manual adjustment result of the focal length by the user. When the environment becomes close to the environment where the distance is manually adjusted, the focal length of the optical lens 51 may be controlled by reflecting the previous manual adjustment result.

Also, the optical control device 5 may store a plurality of manual adjustment results of the focal length by the user. In such a case, it is preferable that the optical control device 5 controls the focal length of the optical lens 51 with priority given to the manual adjustment result of the focal length most recently performed by the user.

Further, for example, the optical control device 5 may cause the information processing device 53 to display the output image 535 shown in FIG. 17 and transmit information regarding the state of the optical control device 5 to the user. Specifically, as shown in FIG. 17, the output image 535 includes an image indicating whether the functions of the optical lens 51, the illuminance sensor, the visual acuity measurement sensor, and the distance measurement sensor included in the optical control device 5 are good or bad. An image indicating the remaining battery level of the control device 5, an image indicating the control range of vision correction of the optical lens 51, and the like are displayed. In addition, when there is a possibility that the visual acuity correction function of the optical control device 5 may deteriorate due to various sensor defects or a decrease in the remaining battery level, a warning image 535A to the user is displayed in the output image 535. Is preferred. For example, in the output image 535 illustrated in FIG. 17, a warning image 535 </ b> A that “the eyesight measurement sensor needs to be cleaned” is displayed. According to this configuration, the user can confirm information related to the state of the optical control device 5 from the output image 535, so that the visual acuity correction function of the optical control device 5 can always be kept normal. Further, according to this configuration, the user can quickly cope with an abnormality occurring in the optical control device 5.

Further, for example, the optical control device 5 may display the output image 537 shown in FIG. 18 on the information processing device 53 and transmit information on the user's visual acuity to the user. Specifically, as shown in FIG. 18, the output image 537 displays a graph that summarizes the results of the user's visual acuity measurement stored in the optical control device 5 in time series. Further, the output image 537 may display a comment 537A obtained by analyzing information related to the user's visual acuity. For example, in the output image 537 shown in FIG. 18, the result of the user's visual acuity measurement gradually decreases in time series, so “the visual acuity is decreasing. Rest your eyes firmly. The comment 537 </ b> A is displayed. According to this configuration, the user can check information about his / her visual acuity from the output image 537, and thus can pay attention to eye health which is difficult to recognize. In addition, eye health can be confirmed from objective visual acuity measurement results.

According to the above configuration, the optical control device 5 according to the fifth embodiment of the present disclosure can communicate with the external information processing device 53 and receive information. It becomes possible to perform adjustment and control with respect to it. In addition, since the optical control device 5 according to the fifth embodiment of the present disclosure can communicate with the external information processing device 53 and transmit information, the user can check the state of the optical control device 5 and the user's own. It becomes possible to accurately grasp the state of visual acuity.

<6. Summary>
As described above, the optical control device according to the present disclosure can acquire distance information even for a target that is not being watched by the user by calculating the distance between the target and the user from the captured image. Therefore, the optical control device according to the present disclosure can control the focal length of the optical lens based on the distance between the entire visual field of the user and the user, and can perform more accurate visual acuity correction on the user.

In addition, the optical control device according to the present disclosure measures, in real time, the target and the distance between the target of the user and the user, the illuminance of the environment in which the user is present, the user's visual acuity, and the like, and reflects the measurement result to determine the focal length of the optical lens. Can be controlled. Therefore, the optical control apparatus according to the present disclosure can perform appropriate vision correction on the user according to the state of the user at that time.

Furthermore, since the optical control device according to the present disclosure can measure and memorize a change in the visual acuity of the user, it can perform an appropriate visual acuity correction more specifically for the individual user.

Note that the optical control devices according to the first to fifth embodiments of the present disclosure can be combined with each other. Specifically, for the visual acuity correction function according to the first embodiment, the attention point detection function according to the second embodiment, the illuminance measurement function according to the third embodiment, and the visual acuity according to the fourth embodiment. It is also possible to combine the measurement function and the communication function according to the fifth embodiment.

That is, an optical control device having a combination of the following functions is also included in the technical scope of the present disclosure.
[1] Vision correction function [2] Vision correction function + attention point detection function [3] Vision correction function + illuminance measurement function [4] Vision correction function + vision measurement function [5] Vision correction function + communication function [6] Vision Correction function + attention point detection function + illuminance measurement function [7] visual acuity correction function + attention point detection function + visual acuity measurement function [8] visual acuity correction function + attention point detection function + communication function [9] visual acuity correction function + illuminance measurement function + Sight measurement function [10] vision correction function + illuminance measurement function + communication function [11] sight correction function + sight measurement function + communication function [12] sight correction function + illumination measurement function + sight measurement function + communication function [13] Vision correction function + attention point detection function + vision measurement function + communication function [14] Vision correction function + attention point detection function + illuminance measurement function + communication function [15] Vision correction function + attention point detection function + illuminance measurement function + vision Measurement function [16 Vision correction function + target-point detecting function + illumination measurement function + eyesight measurement function + communication function

Further, the information processing executed by the optical control device described above is realized by the cooperation of software and hardware. For example, the optical control device includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like that are connected to each other via a bridge. Also good.

Specifically, the CPU functions as an arithmetic processing unit and a control unit, and controls the overall operation in the optical control unit according to various programs. The ROM stores programs and calculation parameters used by the CPU, and the RAM temporarily stores programs used in the execution of the CPU, parameters that change as appropriate during the execution, and the like. Thereby, CPU performs functions, such as a distance calculation part, a control part, an attention point detection part, an image generation part, an illumination intensity measurement part, and a visual acuity measurement part, for example.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the technical scope of the present disclosure is not limited to such examples. It is obvious that a person having ordinary knowledge in the technical field of the present disclosure can come up with various changes or modifications within the scope of the technical idea described in the claims. Of course, it is understood that it belongs to the technical scope of the present disclosure.

In addition, the effects described in this specification are merely illustrative or illustrative, and are not limited. That is, the technology according to the present disclosure can exhibit other effects that are apparent to those skilled in the art from the description of the present specification in addition to or instead of the above effects.

The following configurations also belong to the technical scope of the present disclosure.
(1)
A distance calculation unit for calculating a distance between the target and the target captured in the captured image at the user's viewpoint from the captured image;
A control unit that controls a focal length of an optical lens that corrects the visual acuity of the user based on the distance between the objects calculated by the distance calculation unit and the visual acuity of the user;
An optical control device.
(2)
The optical control device according to (1), wherein the distance calculation unit divides the captured image into a plurality of local regions and calculates the inter-object distance for each local region.
(3)
The lens surface of the optical lens is divided into a plurality of lens regions whose focal length can be controlled independently,
The optical control device according to (2), wherein the control unit controls the focal lengths of the plurality of lens regions based on the inter-object distances calculated for each of the plurality of local regions.
(4)
A point-of-interest detection unit that detects a point of interest at which the line of sight is directed by the user from the captured image;
The optical control device according to (2), wherein the control unit controls a focal length of the optical lens based on the inter-object distance calculated in the local region including the attention point.
(5)
A point-of-interest detection unit that detects a point of interest at which the line of sight is directed by the user from the captured image;
The control unit controls only the focal length of the lens region corresponding to the local region including the attention point based on the inter-object distance calculated in the local region including the attention point; The optical control device according to (3), wherein the focal length of the lens region is not controlled.
(6)
The optical control device according to (4) or (5), wherein the attention point detection unit detects the attention point by performing image processing on the captured image.
(7)
An illuminance information acquisition unit that acquires illuminance information of the environment where the user is located,
The optical control device according to any one of (1) to (6), wherein the control unit further controls a focal length of the optical lens based on the illuminance information.
(8)
The said control part is an optical control apparatus as described in said (7) which makes the focal distance of the said optical lens small, so that the illumination intensity of the environment where the said user exists is low.
(9)
A visual acuity measuring unit for measuring the visual acuity of the user;
The optical control device according to any one of (1) to (8), wherein the control unit controls a focal length of the optical lens based on a user's visual acuity measured by the visual acuity measurement unit.
(10)
The visual acuity measurement unit measures the visual acuity of the user every predetermined time,
The said control part is an optical control apparatus as described in said (9) which controls the focal distance of the said optical lens based on the visual acuity of the latest user measured by the said visual acuity measurement part.
(11)
The optical control device according to any one of (1) to (10), wherein the optical lens further includes an astigmatism correcting optical lens that corrects astigmatism of the user.
(12)
An image generation unit for generating an image;
The optical control device according to any one of (1) to (11), wherein the image generation unit generates an image for displaying various types of information to the user.
(13)
The optical control device according to any one of (1) to (12), wherein the control unit controls a focal length of the optical lens based on information regarding the visual acuity of the user input by the user. .
(14)
Calculating a distance between the target and the target in the captured image at the user's viewpoint from the captured image by the arithmetic processing device;
Controlling the focal length of an optical lens that corrects the visual acuity of the user based on the distance between the objects calculated from the captured image and the visual acuity of the user;
An optical control method.

DESCRIPTION OF SYMBOLS 1 Optical control apparatus 11, 21, 31, 41 Optical lens 13, 23, 33, 43 Imaging apparatus 15 Support member 101, 201, 301, 401 Distance calculation part 103, 203, 303, 403 Control part 105, 205, 305, 405 Vision information storage unit 207 Attention point detection unit 309 Illuminance measurement unit 411 Vision measurement unit

Claims (14)

1. A distance calculation unit for calculating a distance between the target and the target captured in the captured image at the user's viewpoint from the captured image;
   A control unit that controls a focal length of an optical lens that corrects the visual acuity of the user based on the distance between the objects calculated by the distance calculation unit and the visual acuity of the user;
   An optical control device.
2. The optical control apparatus according to claim 1, wherein the distance calculation unit divides the captured image into a plurality of local regions and calculates the inter-object distance for each local region.
3. The lens surface of the optical lens is divided into a plurality of lens regions whose focal length can be controlled independently,
   The optical control device according to claim 2, wherein the control unit controls focal lengths of the plurality of lens regions based on the inter-object distances calculated for the plurality of local regions.
4. A point-of-interest detection unit that detects a point of interest at which the line of sight is directed by the user from the captured image;
   The optical control device according to claim 2, wherein the control unit controls a focal length of the optical lens based on the inter-object distance calculated in the local region including the attention point.
5. A point-of-interest detection unit that detects a point of interest at which the line of sight is directed by the user from the captured image;
   The control unit controls only the focal length of the lens region corresponding to the local region including the attention point based on the inter-object distance calculated in the local region including the attention point; The optical control device according to claim 3, wherein the focal length of the lens region is not controlled.
6. The optical control device according to claim 4, wherein the attention point detection unit detects the attention point by performing image processing on the captured image.
7. An illuminance information acquisition unit that acquires illuminance information of the environment where the user is located,
   The optical control device according to claim 1, wherein the control unit controls a focal length of the optical lens further based on the illuminance information.
8. The optical control device according to claim 7, wherein the control unit decreases the focal length of the optical lens as the illuminance in the environment where the user is present is lower.
9. A visual acuity measuring unit for measuring the visual acuity of the user;
   The optical control device according to claim 1, wherein the control unit controls a focal length of the optical lens based on a user's visual acuity measured by the visual acuity measurement unit.
10. The visual acuity measurement unit measures the visual acuity of the user every predetermined time,
    The optical control device according to claim 9, wherein the control unit controls a focal length of the optical lens based on the visual acuity of the latest user measured by the visual acuity measurement unit.
11. The optical control apparatus according to claim 1, wherein the optical lens further includes an astigmatism correcting optical lens that corrects astigmatism of the user.
12. An image generation unit for generating an image;
    The optical control device according to claim 1, wherein the image generation unit generates an image for displaying various types of information to the user.
13. The optical control device according to claim 1, wherein the control unit controls a focal length of the optical lens based on information on the visual acuity of the user input by the user.
14. Calculating a distance between the target and the target in the captured image at the user's viewpoint from the captured image by the arithmetic processing device;
    Controlling the focal length of an optical lens that corrects the visual acuity of the user based on the distance between the objects calculated from the captured image and the visual acuity of the user;
    An optical control method.

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