Eyeglass lens and eyeglasses

Abstract

Provided are a spectacle lens having an object-side surface and an eyeball-side surface, and having: a light guide member; a first lens element adjacent to the light guide member on the object side; and a second lens element which is adjacent to the light guide member on the eyeball side, and which, when a real image is obtained by imaging the light beams passing through the first lens element and the second lens element, achieves a prescription value of a wearer by means of the first lens element and the second lens element, and also achieves a prescription value of the wearer by means of the first lens element and the second lens element. A virtual image is displayed by the second lens element at a predetermined distance from the wearer, the virtual image being formed by the light beam transmitted in the light guide member and passing through the second lens element.

Description

Technical Field

[0001] The present invention relates to eyeglass lenses and eyeglasses. In particular, the present invention relates to eyeglass lenses and eyeglasses related to a system that allows a wearer to experience virtual reality and / or augmented reality and can be mounted on the user's head. The present invention can also be applied to lens elements constituting eyeglass lenses and even eyeglass frames. Background Art

[0002] Patent document 1 is known, and is related to virtual reality, augmented reality image, and visualization systems. Patent document 1 describes that the variable focus optical element capability can also be used to change the focus of the wavefront of light emerging from the waveguide, providing the eye with the feeling that the light generated from the waveguide comes from a specific focal distance (reference numeral 166 in FIG. 7A ).

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent document 1: WO2015 / 081313 manual. Summary of the invention

[0006] Technical problem to be solved by the invention

[0007] A variable focus lens is used in the technique described in Patent Document 1. On the other hand, when a variable focus lens is used, a special lens such as a liquid crystal lens or an electro-active lens is required.

[0008] If the wearer can appropriately experience virtual reality and / or augmented reality while using a non-variable focus lens made of a normal spectacle lens material, the difficulty of experiencing virtual reality and / or augmented reality is further reduced.

[0009] An object of one embodiment of the present invention is to provide a technology that enables a wearer to appropriately experience virtual reality and / or augmented reality by using ordinary eyeglass lens materials.

[0010] Technical solutions for solving technical problems

[0011] In order to appropriately provide the above experience to the wearer with presbyopia, a progressive dioptric power lens is required. There is also a method of attaching a spectacle lens that provides the above experience to a progressive dioptric power lens that the wearer already has, or a method of inserting the spectacle lens into a spectacle frame. Hereinafter, the spectacle is referred to as experience glasses. Hereinafter, the lens of the glasses is also referred to as experience lens.

[0012] On the other hand, the virtual image obtained by imaging the light beam transmitted in the light guide component is distorted due to the progressive effect of the progressive refractive power lens that the wearer already has.

[0013] The present inventors have conducted intensive research on this point and have come up with the following embodiments in order to use ordinary eyeglass lens materials to allow the wearer to appropriately experience virtual reality and / or augmented reality. The embodiments associated with this knowledge are referred to as embodiment group 1.

[0014] A first aspect of the present invention is a spectacle lens having an object-side surface and an eyeball-side surface, and having:

[0015] a light guide component; a first lens element adjacent to the light guide component on the object side; a second lens element adjacent to the light guide component on the eyeball side,

[0016] When a real image is obtained by imaging the light beams formed by the first lens element and the second lens element, the prescription value of the wearer is realized by using the first lens element and the second lens element, and a virtual image formed by imaging the light beams transmitted in the light guide component and formed by the second lens element is displayed by using the second lens element at a predetermined distance from the wearer.

[0017] The first lens element has a progressive-power lens that achieves an addition power that is one of the wearer's prescription values.

[0018] A second aspect of the present invention is the spectacle lens according to the first aspect,

[0019] The first lens element is a progressive power lens that realizes the addition power in the prescription value,

[0020] The second lens element realizes a prescription value other than the addition in the prescription value.

[0021] A third aspect of the present invention is the eyeglass lens according to the first aspect,

[0022] The light guide component is in the shape of a plate having two flat surfaces.

[0023] The first lens element has a progressive power lens and is a positive lens, and a surface of the positive lens adjacent to the flat surface of the light guide component is flat.

[0024] The second lens element has one negative lens, and a surface of the negative lens adjacent to the flat surface of the light guide member is flat.

[0025] In the case of providing the above experience appropriately for eye refractive anomaly, there is a method of attaching the above experience glasses on the glasses lenses (e.g., single-vision lenses) already owned by the wearer. On the other hand, there is a gap between the glasses lenses already owned by the wearer and the above experience lenses. When there is a gap between the two lenses, the visual angle that the wearer can visually confirm is reduced.

[0026] The present inventors have conducted special research on this point and have come up with the following forms in order to use ordinary eyeglass lens materials to allow the wearer to appropriately experience virtual reality and / or augmented reality images. The forms associated with this knowledge are referred to as embodiment group 2.

[0027] A fourth aspect of the present invention is a spectacle lens,

[0028] It has a face on the object side and a face on the eyeball side, and has:

[0029] a light guide component; a first lens element adjacent to the light guide component on the object side; a second lens element adjacent to the light guide component on the eyeball side,

[0030] When a real image is obtained by imaging the light beams formed by the first lens element and the second lens element, the prescription value of the wearer is realized by using the first lens element and the second lens element, and a virtual image formed by imaging the light beams transmitted in the light guide component and formed by the second lens element is displayed by using the second lens element at a predetermined distance from the wearer.

[0031] The first lens element comprises a positive lens having a positive power which is the reciprocal of the predetermined one distance,

[0032] The second lens element has a functional synthetic lens, and the spherical power of the functional synthetic lens is a value obtained by adding a negative power of the reciprocal of the predetermined distance to the spherical power of the prescription value.

[0033] A fifth aspect of the present invention is the eyeglass lens according to the fourth aspect,

[0034] The light guide component is in the shape of a plate having two flat surfaces.

[0035] The surface of the positive lens adjacent to the flat surface of the light guide member is flat.

[0036] The surface of the functional synthetic lens adjacent to the flat surface of the light guide member is flat.

[0037] Using a non-variable focus lens that is a normal eyeglass lens material means using a normal eyeglass lens material (e.g., a material formed of plastic or glass). The presence or absence of refractive anomaly and the degree of the anomaly vary among wearers. In addition, the distance at which the virtual image is displayed (the distance from the wearer. The same applies hereinafter) also varies depending on the type of virtual image displayed and the display conditions. Using a non-variable focus lens means that it cannot correspond to various conditions of each wearer and virtual image.

[0038] The present inventors have conducted special research on this point and have come up with the following forms in order to use ordinary eyeglass lens materials to allow the wearer to appropriately experience virtual reality and / or augmented reality images. The forms associated with this knowledge are referred to as embodiment group three.

[0039] A sixth aspect of the present invention is a pair of glasses comprising a lens and a glasses frame.

[0040] The lens has an object-side surface and an eyeball-side surface, and has:

[0041] a light guide component; a first lens element adjacent to the light guide component on the object side; a second lens element adjacent to the light guide component on the eyeball side,

[0042] When the lens forms an image through the light beam formed by the first lens element and the second lens element to obtain a real image, the prescription value of the wearer is realized by using the first lens element and the second lens element, and a virtual image formed by forming an image through the light beam transmitted in the light guide component and passing through the second lens element is displayed by using the second lens element at a predetermined distance from the wearer.

[0043] At least one of the first lens element and the second lens element is detachable.

[0044] A seventh aspect of the present invention is the glasses according to the sixth aspect,

[0045] At least the second lens element is freely attachable and detachable.

[0046] An eighth aspect of the present invention is the glasses according to the sixth aspect or the seventh aspect,

[0047] The eyeglass frame includes at least one of a first lens element holder and a second lens element holder. The first lens element holder has a structure that allows the first lens element to be freely attached and detached, and the second lens element holder has a structure that allows the second lens element to be freely attached and detached.

[0048] The above-mentioned aspects may be appropriately combined.

[0049] Hereinafter, other embodiments of the present invention will be described with attention paid to the lens elements of the above-mentioned embodiment groups. The following aspects can be appropriately combined with the above-mentioned aspects.

[0050] An eighth aspect of the present invention is a lens element comprising a first lens element and a second lens element.

[0051] The first lens element is a positive lens, and as a progressive-power lens for realizing the addition power in the prescription value, has a predetermined positive power at a progressive starting point.

[0052] The second lens element is a negative lens that realizes a prescription value other than the addition power in the prescription value, and has a negative power that is equivalent to the positive power in absolute value.

[0053] A ninth aspect of the present invention is a lens element having:

[0054] The first lens element is a positive lens having a predetermined positive power,

[0055] The second lens element, as a functional synthetic lens, has a power obtained by adding a negative power whose absolute value is equivalent to the positive power and a spherical power which is one of the prescription values.

[0056] A tenth aspect of the present invention is the lens element according to the ninth aspect,

[0057] The first lens element is a positive lens, and as a progressive-power lens for realizing the addition power in the prescription value, it has a predetermined positive power at a progressive starting point.

[0058] An eleventh aspect of the present invention is the lens element according to any one of the eighth to tenth aspects,

[0059] The first lens element has two main faces,

[0060] The second lens element has two main faces,

[0061] One main face of the first lens element and one main face of the second lens element are both planar.

[0062] A twelfth aspect of the present invention is a lens element,

[0063] This is a single functional composite lens having a power obtained by combining the spherical power, which is one of the prescription values, with a minus power of -0.25D or less.

[0064] A thirteenth aspect of the present invention is the lens element according to the twelfth aspect,

[0065] The lens element has two main faces, one of which is planar.

[0066] Other aspects of the present invention are listed below. The following aspects may be appropriately combined with the above-mentioned aspects.

[0067] The second lens element may also realize at least one of an astigmatism power other than 0D and a prismatic power other than 0Δ in the prescription value. In this case, the first lens element may have a positive power of the reciprocal of the predetermined distance at least at the center of the lens. In the first embodiment, the positive power may also be maintained at the center of the lens, and a progressive surface for realizing addition power may be provided.

[0068] In the first embodiment, the first lens element may include a progressive-power lens. However, other functional lenses (eg, dimming lenses) may be provided together with or in place of the progressive-power lens.

[0069] A spectacle frame having a spectacle lens embedded therein, the spectacle lens having a surface on the object side and a surface on the eyeball side and having a light guide component, a first lens element adjacent to the light guide component on the object side, and a second lens element adjacent to the light guide component on the eyeball side.

[0070] When the eyeglass lens forms an image through the light beam formed by the first lens element and the second lens element to obtain a real image, the eyeglass lens realizes the prescription value of the wearer by using the first lens element and the second lens element, and displays a virtual image formed by the light beam formed by the light beam transmitted in the light guide component and passing through the second lens element at a predetermined distance from the wearer through the second lens element.

[0071] The eyeglass frame includes at least one of a first lens element holder having a structure that allows the first lens element to be detachably attached and detached, and a second lens element holder having a structure that allows the second lens element to be detachably attached and detached.

[0072] A program for causing a virtual image display system having the above-mentioned eyeglass lenses and an image light emitting portion for emitting image light, and functions of the system to function in a computer.

[0073] Effects of the Invention

[0074] According to one embodiment of the present invention, ordinary eyeglass lens materials are used to enable the wearer to properly experience virtual reality and / or augmented reality. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] Figure 1 This is a schematic horizontal cross-sectional view showing a spectacle lens according to one embodiment of the present invention functioning as a part of a virtual image display system. DETAILED DESCRIPTION

[0076] Hereinafter, one embodiment of the present invention will be described. "-" means a value greater than or equal to a predetermined value and less than or equal to a predetermined value.

[0077] <Common items of embodiment groups 1 to 3>

[0078] One aspect of the present invention relates to eyeglass lenses, eyeglasses, and lens elements associated with a system that enables a wearer to experience virtual reality and / or augmented reality and that can be mounted on a user's head.

[0079] A system according to an embodiment of the present invention comprises an image light emitting unit for emitting image light and the following eyeglass lenses. The image light emitting unit refers to a structure including a light source, a projection lens, etc. required for emitting image light. As with a real image, the beam of image light passes through the pupil of the wearer and forms an image on the retina, whereby the wearer recognizes a virtual image. There is no limitation on the virtual image, and it can be a dynamic image or a still image.

[0080] The system may be a head mounted display or a smart glasses. Hereinafter, the case where the system is a smart glasses will be exemplified. One form of the present invention may be a spectacle lens on the smart glasses.

[0081] based on Figure 1 A spectacle lens according to an embodiment of the present invention will be described. Figure 1 This is a schematic horizontal cross-sectional view showing a spectacle lens according to one embodiment of the present invention functioning as a part of a virtual image display system. Each reference numeral is as described in the description item of the reference numeral in this specification. The description of the reference numeral is omitted in this specification.

[0082] An eyeglass lens according to an embodiment of the present invention has a perspective function and has a surface on the object side and a surface on the eyeball side. The surface on the object side and the surface on the eyeball side are opposite to each other, and when viewed from the surface on the object side, the portion of the surface that is opposite to the optical axis is the surface on the eyeball side, and conversely, when viewed from the surface on the eyeball side, the portion of the surface that is opposite to the optical axis is the surface on the object side.

[0083] The y direction referred to in this specification is the direction along the meridian, which is the vertical direction. The upper side of the lens in the wearing state is set as the +y direction, and the lower side of the lens is set as the -y direction. The x direction is the direction orthogonal to the meridian, which is the horizontal direction. When observing relative to the wearer, the right side of the lens is set as the +x direction, and the left side of the lens is set as the -x direction. The direction orthogonal to the x direction and the y direction, that is, the lens thickness direction (optical axis direction) is set as the z direction, the object side is set as the +z direction, and the eyeball side is set as the -z direction.

[0084] It should be noted that one feature of one form of the present invention is to set the variable focus lens referred to in Patent Document 1 as a non-variable focus lens. For example, for structures other than the technology related to the optical part referred to in Patent Document 1 (the specific structure of the light source, projection lens, light guide component (or waveguide), the drive control unit of the system, etc.), known structures can be adopted, and therefore, detailed description is omitted.

[0085] A spectacle lens according to one embodiment of the present invention includes a light guide member, a first lens element adjacent to the light guide member on an object side, and a second lens element adjacent to the light guide member on an eyeball side.

[0086] A light guide member according to an embodiment of the present invention includes a portion (referred to as a waveguide in this specification) through which a light beam actually passes, and a portion that covers and protects the waveguide.

[0087] The first lens element is adjacent to the light guide component on the object side. The second lens element is adjacent to the light guide component on the eyeball side. The "adjacent" referred to in this specification includes a physical contact state with the light guide component, including a non-contact but close state (for example, the maximum spacing distance at the geometric center of the lens is 8 mm, or 5 mm, or 3 mm).

[0088] The first lens element and the second lens element are non-variable focus lenses made of plastic or glass. The first lens element and the second lens element may also include a hard coating, an anti-reflection layer, an anti-fouling layer, and the like.

[0089] The eyeglass lens of one embodiment of the present invention has a perspective function. Therefore, when a light beam formed by the first lens element and the second lens element is imaged to obtain a real image, the prescription value of the wearer is realized by using the first lens element and the second lens element. The realization of the prescription value of the wearer is achieved by the refractive index and surface shape of the materials of the first lens element and the second lens element.

[0090] Furthermore, the virtual image formed by imaging the light beam transmitted through the second lens element in the light guide component is displayed by the second lens element at a predetermined distance from the wearer. The predetermined distance is also referred to as "display distance".

[0091] like Figure 1 As shown, the light beam of the virtual image passes through the second lens element, not the first lens element. Therefore, the second lens element can be set to a curved surface shape that can display the virtual image at a display distance (for example, 2m) away from the wearer. When giving a specific example, a concave surface (i.e. -0.50D) with a degree of 0.50D (=1 / (2m)) can be set as the curved surface shape. At the same time, the first lens element can be set to +0.50D. Through this structure, a wearer who does not have refractive anomalies can visually confirm the outside world appropriately, and visually confirm the virtual image appropriately at a position separated from the display distance.

[0092] In addition, the wearer's prescription value is recorded on the lens bag of the spectacle lens. This situation is no exception when the spectacle lens of one embodiment of the present invention has a light guide component. The reason is that in the spectacle lens of one embodiment of the present invention, the refractive anomaly is corrected in the confirmation of the outside world, so the prescription value needs to be recorded. As a result, the spectacle lens of one embodiment of the present invention is also attached with a lens bag.

[0093] If there is a lens bag, the eyeglass lens can be determined based on the wearer's prescription value. In addition, the eyeglass lens is usually matched with the lens bag. Therefore, the eyeglass lens with a lens bag also reflects the technical concept of the present invention, and the matching of the lens bag and the eyeglass lens is also the same.

[0094] The prescription values ​​of the wearer may include, for example, the spherical power (S degree) at emmetropia (infinity), the astigmatism (C degree), the astigmatism axis (Ax), and the prism power (Δ). In the case of progressive-power lenses, in addition to the above prescription values, the addition (ADD) may also be included. The addition in this specification is the difference between the spherical power at emmetropia (infinity) and the degree required for vision correction at near vision (a positive value in this specification).

[0095] There is no limit to the number of lenses constituting the first lens element. There is no limit to the number of lenses constituting the second lens element. On the other hand, when the number of lenses is increased, the thickness of the lens increases. Therefore, preferably, the lens constituting the first lens element is a positive lens (the surface on the object side is convex), and the lens constituting the second lens element is a negative lens (the surface on the eyeball side is concave). Details are described later.

[0096] In the above example, the spectacle lens has a convex surface on the object side and a concave surface on the eyeball side. That is, in the above example, the spectacle lens is a meniscus lens.

[0097] <Example Group 1>

[0098] One of the characteristics of embodiment group 1 is that the first lens element has a progressive refractive power lens that realizes an addition power that is one of the wearer's prescription values.

[0099] As described in the method column above, the virtual image obtained by imaging the light beam transmitted in the light guide component is distorted due to the progressive effect of the progressive refractive power lens that the wearer already has. The countermeasure is to have the above-mentioned features of the first embodiment. The first lens element does not pass the light beam of the virtual image. Focusing on this point, it is one of the features of the first embodiment to concentrate the progressive component of the progressive refractive power lens in the first lens element of the light beam that does not pass the virtual image. Through this feature, the wearer's presbyopia can be corrected, and the virtual image will not be distorted by the progressive effect.

[0100] The addition in the prescription value is preferably achieved by the first lens element as a progressive refractive power lens. In a specific example of the first embodiment, the object-side surface of the first lens element is set as a progressive surface, and none of the eyeball-side surface of the first lens element, the object-side surface of the second lens element, and the eyeball-side surface of the second lens element is set as a progressive surface. In this case, it can be said that the addition can be achieved only by the first lens element (more specifically, the object-side surface of the first lens element).

[0101] Furthermore, the prescription values ​​other than the addition power in the prescription values ​​are preferably realized by the second lens element. Of course, the prescription value can also be realized by a combination of the surface on the object side and the surface on the eyeball side of the eyeglass lens. On the other hand, in a specific example of the first embodiment, the surface on the object side of the first lens element is set as a progressive surface, and, in any case, preferably, the power of the lens center (described later) of the first lens element is set to a power corresponding to the display distance of the virtual image.

[0102] Furthermore, by processing the surface of the second lens element on the eyeball side into a predetermined shape, the light beam as the external light that has passed through the first lens element and the second lens element is imaged on the wearer's retina, and when the wearer visually confirms the real image, the prescription value including the addition is realized. Therefore, in this specification, the shape of the second lens element (the surface on the eyeball side in the case of one lens) that conforms to the prescription value other than the addition is referred to as "the prescription value other than the addition in the prescription value is realized by the second lens element".

[0103] In order to visually confirm the real image, as described in the above paragraph, the first lens element is also indispensable for realizing the prescription value. On the other hand, in the example described in this paragraph, in any case, the first lens element mainly has the function of realizing the addition and having the positive power corresponding to the display distance at which the virtual image is arranged. Therefore, "the prescription value other than the addition in the prescription value is realized by the second lens element" can be referred to as "the first lens element has no special function of realizing the prescription value other than the addition".

[0104] Of course, a prescription value other than the addition power can be realized by the first lens element. In this case, the progressive-power lens as the first lens element has a complex surface shape. If such a first lens element is prepared as a non-variable-focus lens, it may be easier to prepare a variable-focus lens.

[0105] Therefore, it is preferred that the first lens element is a progressive power lens that realizes the addition in the prescription value. It should be noted that processing to reflect prescription values ​​other than the addition in the prescription value is easier than processing to reflect the progressive component. Therefore, there is no problem in processing the second lens element to reflect prescription values ​​other than the addition in the prescription value.

[0106] The light guide component may be in the shape of a flat plate having two flat surfaces (main surfaces) opposing each other in the thickness direction of the lens. The light guide component may also be bent. The light guide component may also be bent into a concave-convex lens shape. However, when the waveguide is bent, the control related to the imaging of the virtual image becomes very difficult. When the surface shape of the portion covering the waveguide for protection is bent, the volume of the light guide component becomes larger. This is related to the increase in the edge thickness of the eyeglass lens. In the case of adopting the form of glasses (smart glasses), the increase in edge thickness is not preferred. Therefore, the light guide component may be in the shape of a flat plate.

[0107] The term "flat plate" in this specification includes a complete flat plate and an incomplete flat plate. As an incomplete flat plate, a flat surface having a depression in a portion connected to an image light emitting portion for emitting image light, which is one of the two main flat surfaces, can also be considered as a flat plate. As an example, a case where more than 50% (preferably more than 80% of the area) of each of the two main surfaces of the light guide component exists in the same plane is considered as a flat plate.

[0108] Furthermore, the first lens element has a progressive power lens and is a positive lens, and the surface of the positive lens adjacent to the flat surface of the light guide component may be flat. Furthermore, the second lens element has a negative lens, and the surface of the negative lens adjacent to the flat surface of the light guide component may be flat.

[0109] When the two main surfaces of the light guide component are curved, the surface of the first lens element adjacent to the light guide component also needs to be a shape that imitates the curved surface shape. This is because an unexpected refractive power is generated between the first lens element and the light guide component. In this way, in the first lens element, one surface must be processed to reflect the progressive component, and it takes time to process it into a curved shape that imitates the light guide component. In this way, if the light guide component is made flat from the beginning, it does not need to be processed into a curved shape. The content of this paragraph is also applicable to the second lens element.

[0110] Hereinafter, a specific example will be given in which it is assumed that the light guide member is formed into a flat plate and a virtual image is displayed at a distance of 2 m.

[0111] On the object side surface of the first lens element as a progressive refractive power lens, the diopter is set to +0.50D at the measurement reference point F and the lens center (optical center, fitting point, eye point). The progressive start point is arranged at the lens center or just below it. And, in the case where the addition power in the prescription value of the wearer of presbyopia is 1.50D, the near diopter measurement reference point is set to 2.00D. The eyeball side surface of the first lens element is flat (plano). That is, the first lens element is a positive lens.

[0112] Furthermore, the positions of the measurement reference point F, the fitting point or the eye point FP, and the measurement reference point N can be determined by referring to a remark chart or a centration chart issued by a lens manufacturer.

[0113] The surface of the second lens element on the eyeball side has a shape that reflects the prescription value other than the addition power in the prescription value. For example, when the prescription value S power is -3.00D and the C power is 0.00D, the concave shape of -3.50D is calculated by adding -0.50D for displaying a virtual image at a distance of 2m and S power -3.00D. The surface of the second lens element on the object side is flat (plano). That is, the second lens element in this example is a negative lens.

[0114] The contents described in the items of the first embodiment group can be appropriately combined with other embodiment groups and modified examples.

[0115] <Example Group 2>

[0116] One of the features of the second embodiment is that the second lens element has a power obtained by adding a power corresponding to the display distance (-0.50D in the above example) to a spherical power which is one of the prescription values. That is, one of the features of the second embodiment is that the lens element that performs the function of displaying a virtual image at a predetermined distance and the lens element that performs the function of correcting the refractive error of the wearer are integrated with each other.

[0117] As described in the column of the above method, there is a gap between the glasses lens that the wearer already has and the above trial lens. If there is a gap between the two lenses, the visual angle that the wearer can visually confirm is reduced. The countermeasure is to have the above-mentioned feature of the second embodiment. Due to this feature, there may be no gap between the two lenses, and the possible visual angle that the wearer can visually confirm may not be reduced.

[0118] The specific structure of the second embodiment group is as follows. The first lens element has a positive lens having a positive power of the reciprocal of the predetermined distance. And the second lens element has a functional synthetic lens having a power obtained by adding the negative power of the reciprocal of the predetermined distance and the spherical power as one of the prescription values. In detail, the spherical power of the functional synthetic lens is a value obtained by adding the negative power of the reciprocal of the predetermined distance and the spherical power of the prescription value. In any case, the functional synthetic lens has a power corresponding to the predetermined distance and the prescription value (spherical power, astigmatism power, astigmatism axis, prism power, etc.).

[0119] In the second embodiment, the example of specific numbers used in the first embodiment and the example of the light guide member being a flat plate are also adopted, and the first lens element has a positive lens with a surface on the object side of +0.50D (the reciprocal of the display distance is a positive power), and the surface of the eyeball side adjacent to the light guide member is 0D (plano). The second lens element has a concave shape with a negative power of -3.50D (=-0.50D+(-3.00D)) on the eyeball side, and a negative lens with a surface on the object side adjacent to the light guide member of 0D (plano).

[0120] It should be noted that, in the example in the above paragraph, a negative lens having a negative power that makes the negative power of the reciprocal of the display distance and the spherical power that is one of the prescription values ​​add up is listed, but it is not limited to this. For example, when the S power of the prescription value is +3.00D, the surface on the eyeball side is a convex shape (positive lens) of +2.50D (=-0.50D+3.00D) which is a positive power. And, when the S power of the prescription value is +0.50D, the surface on the eyeball side is 0D (=-0.50D+0.50D). In the case where the light guide component is a flat plate, as a result, the second lens element has a disc-shaped lens. The lenses possessed by the second lens element in this case are collectively referred to as functional synthetic lenses.

[0121] The contents described in the items of the second embodiment group can be appropriately combined with other embodiment groups and modified examples.

[0122] <Example Group 3>

[0123] Embodiment group 3 is a form focusing on glasses (smart glasses). One of the features of embodiment group 3 is that at least one of the first lens element and the second lens element (at least the second lens element, and depending on the situation, two lens elements) can be freely attached and detached from the glasses. Hereinafter, the case where the two lens elements are freely attached and detached from the glasses is exemplified, but only one of the two lens elements can be freely attached and detached, and in particular, only the second lens element can be freely attached and detached. Therefore, the present invention is not limited to this example.

[0124] As described in the column of the above method, using a single non-variable focus lens does not correspond to various situations of each wearer and virtual image. A countermeasure is to prepare a plurality of types of first lens elements and second lens elements.

[0125] Regarding the first lens element, in the case of adopting the first embodiment, the first lens element has a progressive refractive power lens. That is, it is necessary to prepare a plurality of types of progressive refractive power lenses. Of course, the first lens element can be manufactured after receiving an order for glasses (smart glasses), but it is not realistic to manufacture progressive surfaces that are different from each other for each order. Therefore, it is realistic to prepare a semi-finished lens in which a progressive surface with a predetermined addition power is pre-formed on the surface on the object side.

[0126] If, in the case of preparing a semi-finished lens reflecting a prescription value other than the addition, it is necessary to prepare semi-finished lenses of the same types as the number of combinations of the prescription values.

[0127] On the other hand, in the case of using the first embodiment, the types of semi-finished lenses to be prepared can be very small. This is because the progressive-power lenses in the first embodiment are for realizing the addition power in the prescription value. The progressive-power lenses realizing the addition power can significantly reduce the types of semi-finished lenses to be prepared compared to the case of reflecting the prescription value other than the addition power.

[0128] If the light guide member is in the shape of a flat plate, the surface of the first lens element on the eyeball side is also flat. If the surface opposite to the progressive surface of the semi-finished lens is made flat, even the time for new processing can be omitted.

[0129] Regarding the second lens element, in the case of using the second embodiment, the second lens element has a negative lens having a negative power calculated by adding a negative power of the reciprocal of the predetermined distance and a spherical power as one of the prescription values. If it is a negative lens, it is easy to process it from a lens blank according to the existing technology. If the light guide member is a flat plate, the object side surface of the second lens element is also flat, and processing is further easy.

[0130] There is no limitation on the specific structure for making the first lens element and / or the second lens element freely attachable and detachable from the glasses. For any structure of the glasses, it is sufficient to provide a structure capable of switching the holding and detaching of the first lens element and / or the second lens element. The structure may also be provided on the light guide component. Although the light guide component is protected, it is a precision component and it is not preferred to apply an impact of attachment and detachment every time. Therefore, it is preferred to provide the structure on the glasses frame. In the glasses frame, it is preferred to provide the structure on the lens ring that is located closer to the glasses lens.

[0131] As a specific example of the above structure, for example, after a half-rim with a rim only on the upper side is used on the glasses, a light guide component is fixed to the rim on the upper side, and a groove and a limit stop that can hold and detach the first lens element and the second lens element positioned across the light guide component can also be provided.

[0132] As another specific example of the above-mentioned structure, for example, after a full bezel that completely covers the eyeglass lens is adopted on the glasses, a covered slot is provided on the upper side of the bezel, a light guide component is fixed to the bezel, and the first lens element and the second lens element positioned across the light guide component can be inserted into and detached from the slot.

[0133] <Modification example>

[0134] In the above, the embodiments of the present invention are described, and the above disclosures represent exemplary embodiments of the present invention. That is, the technical scope of the present invention is not limited to the above exemplary embodiments, and various changes can be made without departing from the scope of the gist. In addition, for the following modified examples, the above disclosures can be arbitrarily selected and combined.

[0135] In one aspect of the present invention, the case where the C power is 0.00D is exemplified, but the present invention can also be applied when the C power is a value other than this value. Specifically, the surface of the second lens element on the eyeball side can be set to a complex surface corresponding to the C power and the astigmatism axis Ax. Furthermore, even if the prism power Δ exists as a prescription value, the shape corresponding to the prism power Δ can be reflected on the surface of the second lens element on the eyeball side.

[0136] That is, the second lens element can realize at least any one of the astigmatism power other than 0D and the prismatic power other than 0Δ in the prescription value. In this case, the first lens element can have a positive power of the reciprocal of the predetermined distance at least at the center of the lens. In the first embodiment, a progressive surface can be provided to realize the addition power while maintaining the positive power at the center of the lens.

[0137] In one aspect of the present invention, for ease of description, the technical content is described in a manner applicable to a case where the surface shape of the second lens element is a spherical surface. On the other hand, the surface shape of the second lens element in one aspect of the present invention may be a spherical surface or may be other shapes (e.g., a toric surface, a shape corresponding to the prism power Δ).

[0138] In the first embodiment, the surface on the object side of the progressive-power lens included in the first lens element may be a progressive surface that is an aspherical surface. The surface on the side adjacent to the light guide component in the first lens element (e.g., the surface on the eyeball side of the progressive-power lens) and the surface on the side adjacent to the light guide component in the second lens element may be a shape that imitates the main surface of the light guide component. Furthermore, the surface on the eyeball side of the second lens element may be a shape that realizes a prescription value other than the addition power, and may be a spherical surface or an aspherical surface.

[0139] In the second embodiment group, the surface on the object side of the positive lens of the first lens element can be a progressive surface that is an aspherical surface as in the first embodiment group, or can be a spherical surface. The surface on the side adjacent to the light guide component in the first lens element (for example, the surface on the eyeball side of the positive lens) and the surface on the side adjacent to the light guide component in the second lens element (for example, the surface on the object side of the functional synthetic lens) can also be a shape that imitates the main surface of the light guide component. In addition, if the surface on the eyeball side of the functional synthetic lens has a degree that is a sum of the negative degree corresponding to the display distance and the spherical degree, it can be a spherical surface or an aspherical surface. Similar to the second lens element in the first embodiment group, if the shape of the surface on the eyeball side of the functional synthetic lens is used to meet the consistency of the prescription value, there is no limitation on the shape of the surface on the eyeball side of the functional synthetic lens. In the second embodiment group, all prescription values ​​including the addition power can be achieved by the functional synthetic lens.

[0140] In the first embodiment group, the case where the first lens element includes a progressive refractive power lens is listed, but other functional lenses (such as a dimming lens) may also be provided together with the progressive refractive power lens or instead of the progressive refractive power lens.

[0141] In the embodiment group 1, the first lens element includes a progressive refractive power lens as one of the features, and it is not necessary to have the features of the embodiment groups 2 and 3. For example, in the embodiment group 1, the second lens element may be provided separately as a lens element that performs a function of displaying a virtual image at a predetermined distance and a lens element that performs a function of correcting the refractive anomaly of the wearer. Furthermore, the first lens element and / or the second lens element may not be freely attachable to and detachable from the glasses.

[0142] Similarly, in the second embodiment, it is not necessary to have the features of the first to third embodiments. For example, in the second embodiment, the first lens element may not include a progressive power lens, and the second lens element may be used to achieve all prescription values. Furthermore, the first lens element and / or the second lens element may not be freely attachable to or detachable from the glasses.

[0143] Likewise, in embodiment group three, it is not necessary to have the features of embodiment group one and embodiment group two.

[0144] However, as described in the items of each embodiment group, the use of the structure of each embodiment group can bring great benefits. Therefore, it is preferred to arbitrarily combine the structures of each embodiment group, and more preferably, combine part or all of the contents described in the items of each embodiment group.

[0145] As described in the common items of the first to third embodiment groups, one feature of one aspect of the present invention is that the variable focus lens described in Patent Document 1 is set as a non-variable focus lens. Therefore, the technical concept of the present invention is also reflected in the lens elements adopted in each embodiment group.

[0146] The structure of the lens element in the first embodiment is as follows:

[0147] The lens elements have:

[0148] The first lens element is a progressive-power lens for realizing the addition power in the prescription value, and has a positive lens with a predetermined positive power at the progressive starting point.

[0149] The second lens element is a negative lens other than the added power in the prescription value, and has a negative power equivalent to the positive power in absolute value.

[0150] It should be noted that the so-called absolute value in this specification is an equivalent diopter, which includes the case where the diopter is exactly the same, and also includes the case where the diopter is within the tolerance range of the diopter of the eyeglass lens (for example, ±0.12D).

[0151] The structure of the lens element in the second embodiment is as follows:

[0152] The lens elements have:

[0153] The first lens element is a positive lens having a predetermined positive power,

[0154] The second lens element is a negative lens having a negative power obtained by adding a negative power having an absolute value equivalent to the positive power and a spherical power which is one of the prescription values.

[0155] Preferably, it further has the following structure.

[0156] The above-mentioned lens element is that the first lens element is a progressive refractive power lens that realizes the diopter in the prescription value, and has a positive lens with a predetermined positive power at the progressive starting point.

[0157] In addition to the above structure, the structure in which the light guide component is reflected in the lens element is as follows:

[0158] The above-mentioned lens element is,

[0159] The first lens element has two main faces,

[0160] The second lens element has two main faces,

[0161] One principal surface of the first lens element (a surface on the eyeball side in one aspect of the present invention) and one principal surface of the second lens element (a surface on the object side in one aspect of the present invention) are both flat.

[0162] The second embodiment has one of the characteristics in the second lens element. The structure of the lens element focusing on this point is as follows:

[0163] The lens element is a single negative lens having a negative power obtained by adding a spherical power, which is one of the prescription values, to a negative power of -0.25D or less.

[0164] And, preferably, it has the following structure.

[0165] The lens element has two main surfaces, and one main surface (the surface on the object side in one embodiment of the present invention) is flat.

[0166] In the third embodiment, the eyeglass frame has a structure that allows the first lens element and / or the second lens element to be freely attached to and detached from the eyeglasses. The structure focusing on this point is as follows.

[0167] A spectacle frame is embedded with a spectacle lens having a surface on the object side and a surface on the eyeball side, and having a light guide component, a first lens element adjacent to the light guide component on the object side, and a second lens element adjacent to the light guide component on the eyeball side.

[0168] When the eyeglass lens forms an image through the light beam formed by the first lens element and the second lens element to obtain a real image, the eyeglass lens realizes the prescription value of the wearer by using the first lens element and the second lens element, and displays a virtual image formed by the light beam formed by the light beam transmitted in the light guide component and passing through the second lens element at a predetermined distance from the wearer through the second lens element.

[0169] The eyeglass frame includes at least one of a first lens element holder having a structure that allows the first lens element to be detachably attached and detached, and a second lens element holder having a structure that allows the second lens element to be detachably attached and detached (preferably, at least the second lens element holder).

[0170] The present invention also reflects the technical idea in a virtual image display system having the above-mentioned eyeglass lenses, an image light emitting portion for emitting image light, and a program for causing a computer to perform the functions of the system.

[0171] Description of Reference Numerals

[0172] 1…eyeglass lenses;

[0173] 2…light guide component;

[0174] 21…side (edge);

[0175] 3…a first lens element;

[0176] 31 ... an object-side surface of the first lens element;

[0177] 32 ... an eyeball-side surface of the first lens element;

[0178] 4…second lens element;

[0179] 41 ... an object-side surface of the second lens element;

[0180] 42… an eyeball-side surface of the second lens element;

[0181] E…eye;

[0182] V…a light beam of a virtual image (from an image light emitting unit);

[0183] R… beam of realistic image (from the outside world);

[0184] O…The center of the pupil is also the center of the lens.

Claims

1. A spectacle lens, It has an object-side surface and an eyeball-side surface, and has: A light guide component; a first lens element adjacent to the light guide component on the object side; a second lens element adjacent to the light guide component on the eyeball side, characterized in that: When a real image is obtained by imaging the light beams formed by the first lens element and the second lens element, the prescription value of the wearer is realized by using the first lens element and the second lens element, and a virtual image formed by imaging the light beams transmitted in the light guide component and formed by the second lens element is displayed by using the second lens element at a predetermined distance from the wearer. The first lens element has a progressive-power lens that achieves an addition power that is one of the wearer's prescription values.

2. The eyeglass lens according to claim 1, characterized in that The first lens element is a progressive power lens that realizes the addition power in the prescription value, The second lens element realizes a prescription value other than the addition in the prescription value.

3. The eyeglass lens according to claim 1, The light guide component is in the shape of a plate having two flat surfaces. The first lens element has a progressive power lens and is a positive lens, and a surface of the positive lens adjacent to the flat surface of the light guide component is flat. The second lens element has one negative lens, and a surface of the negative lens adjacent to the flat surface of the light guide member is flat.

4. A spectacle lens, It has an object-side surface and an eyeball-side surface, and has: A light guide component; a first lens element adjacent to the light guide component on the object side; a second lens element adjacent to the light guide component on the eyeball side, characterized in that: When a real image is obtained by imaging the light beams formed by the first lens element and the second lens element, the prescription value of the wearer is realized by using the first lens element and the second lens element, and a virtual image formed by imaging the light beams transmitted in the light guide component and formed by the second lens element is displayed by using the second lens element at a predetermined distance from the wearer. The first lens element comprises a positive lens having a positive power which is the reciprocal of the predetermined one distance, The second lens element has a functional synthetic lens, and the spherical power of the functional synthetic lens is a value obtained by adding a negative power of the reciprocal of the predetermined distance to the spherical power of the prescription value.

5. The eyeglass lens according to claim 4, wherein the light guide member is in the shape of a plate having two flat surfaces. The surface of the positive lens adjacent to the flat surface of the light guide member is flat. The surface of the functional synthetic lens adjacent to the flat surface of the light guide member is flat.

6. A pair of glasses, characterized in that: A spectacle lens and a spectacle frame, The spectacle lens has a surface on the object side and a surface on the eyeball side, and has: a light guide component; a first lens element adjacent to the light guide component on the object side; a second lens element adjacent to the light guide component on the eyeball side, When the spectacle lens forms an image through the light beam formed by the first lens element and the second lens element to obtain a real image, the prescription value of the wearer is realized by using the first lens element and the second lens element, and a virtual image formed by forming an image through the light beam transmitted in the light guide component and passing through the second lens element is displayed by using the second lens element at a predetermined distance from the wearer. At least one of the first lens element and the second lens element is detachable.

7. The glasses according to claim 6, characterized in that: At least the second lens element is freely attachable and detachable.

8. The glasses according to claim 6 or 7, characterized in that: The eyeglass frame includes at least one of a first lens element holder and a second lens element holder. The first lens element holder has a structure that allows the first lens element to be freely attached and detached, and the second lens element holder has a structure that allows the second lens element to be freely attached and detached.

Images