Eyeglass lens and eyeglasses

Abstract

Provided are: a spectacle lens which has a surface on the object side and a surface on the eyeball side, and which is provided with a light guide member; a first lens element adjacent to the light guide member on the object side; a second light-emitting element adjacent to the light guide member on the eyeball side; when a real image is obtained by light beam imaging of the first lens element and the second lens element, the prescription value of the wearer is realized by the first lens element and the second lens element. A virtual image obtained by imaging the light flux transmitted through the light guide member and passing through the second lens element is displayed by the second lens element at a predetermined distance from the wearer, and at least one of the first lens element and the second lens element is provided with an electrochromic laminate.

Description

Technical Field

[0001] The present invention relates to spectacle lenses and spectacles. In particular, the present invention relates to spectacle lenses and spectacles involved in a system that enables a wearer to experience virtual reality and / or augmented reality, that is, a system that can be worn on a user's head. The present invention can also be applied to lens elements constituting spectacle lenses and spectacle frames. Background Art

[0002] Regarding virtual reality and augmented reality images and visualization systems, Patent Document 1 is known. In Patent Document 1, it is described that the ability of a variable-focus optical element can also be used to change the focus of the wavefront of light emerging from a waveguide, providing the perception that the light generated from the waveguide is light from a specific focal length to the eye (reference numeral 166 in FIG. 7A).

[0003] As an electrochromic element or laminate provided in spectacle lenses, Patent Documents 2 and 3 filed by the applicant are disclosed. The electrochromic element or laminate (hereinafter referred to as laminate) in the present specification can be fully referred to the contents described in Patent Document 2 or Patent Document 3.

[0004] Prior Art Documents

[0005] Patent Documents

[0006] Patent Document 1: Pamphlet No. WO2015 / 081313

[0007] Patent Document 2: Pamphlet No. WO2022 / 123915

[0008] Patent Document 3: Pamphlet No. WO2022 / 085666 Summary of the Invention

[0009] Technical Problem to be Solved by the Invention

[0010] In the technology described in Patent Document 1, variable-focus lenses are used. On the other hand, in the case of using variable-focus lenses, special lenses such as liquid crystal lenses or electroactive lenses are required.

[0011] If a non-variable-focus lens, which is a material for ordinary spectacle lenses, is used and the wearer can appropriately experience virtual reality and / or augmented reality, the experience barriers of virtual reality and / or augmented reality can be further reduced.

[0012] Hereinafter, spectacle lenses that provide the above experience and spectacles in which the spectacle lenses are inserted into a spectacle frame are also referred to as experience spectacles. Hereinafter, the lenses of the spectacles are also referred to as experience lenses.

[0013] From the perspective of the experience of virtual reality and / or augmented reality, the present inventors have found the following technical problems.

[0014] Among the experience glasses sold on the market, there are also experience glasses that have the function of adjusting the amount of light entering the experience lenses.

[0015] As an example, experience lenses with a photochromic layer are known. If it is such an experience lens, the transmittance can be adjusted between about 15% and 90%, and the dynamic range is relatively large. In addition, it is easy to be processed into a spherical shape and a curved surface shape. On the other hand, the response time when adjusting the transmittance is long. For example, it takes about 20 seconds to transfer the transmittance from the maximum value of the settable range to the intermediate value, and about 120 seconds to fade from the maximum value of the settable range to the intermediate value. In addition, the reactivity is easily affected by the amount of ultraviolet rays and the temperature (UV independent and Temperature dependence: not affected by ultraviolet rays and temperature dependence).

[0016] As another example, experience lenses with an electronic device composed of liquid crystal are known. If it is such an experience lens, the response time when adjusting the transmittance can be relatively short. For example, it only takes less than 1 second (msec level) to transfer the transmittance from the maximum value of the settable range to the intermediate value, and to fade from the maximum value of the settable range to the intermediate value. In addition, the reactivity is not easily affected by the amount of ultraviolet rays and the temperature. On the other hand, the dynamic range of the transmittance is at most only about 40%. In addition, it is not easy to process into a spherical shape and a curved surface shape.

[0017] Virtual reality and / or augmented reality experience venues are continuously expanding in various countries around the world, whether outdoors or indoors. From the perspective of the outdoors or indoors, from the aspect of enabling the wearer to appropriately experience virtual reality and / or augmented reality, a relatively large dynamic range of transmittance is preferred.

[0018] In addition, the loading time of computer games has an increasingly greater impact on user satisfaction in recent years. The loading time during virtual reality and / or augmented reality experiences has an even greater impact on user satisfaction. Therefore, a short response time when adjusting the transmittance is preferred. Assuming that the response time is long, the user has to wait until the light amount becomes appropriate, resulting in a decrease in satisfaction.

[0019] In addition, from the perspective of various countries around the world, it is preferred to reduce the influence of the amount of ultraviolet rays and the temperature on the reactivity.

[0020] An object of an embodiment of the present invention is to provide a technology that enables a wearer to appropriately and comfortably experience virtual reality and / or augmented reality regardless of the location by using the material of a normal spectacle lens.

[0021] Technical means for solving technical problems

[0022] A first aspect of the present invention is an ophthalmic lens, which has a surface on the object side and a surface on the eye side, and includes: a light guide member; a first lens element adjacent to the light guide member on the object side; a second lens element adjacent to the light guide member on the eye side; when a real image is formed by imaging a light beam passing through the first lens element and the second lens element, the prescription value of the wearer is achieved by using the first lens element and the second lens element, and a virtual image formed by imaging a light beam transmitted through the light guide member and passing through the second lens element is displayed at a prescribed distance away from the wearer, and at least one of the first lens element and the second lens element includes an electrochromic laminate.

[0023] A second aspect of the present invention is the ophthalmic lens according to the first aspect, wherein the electrochromic laminate satisfies at least one of the following: (1) the electrochromic laminate is disposed on the outermost surface on the object side of the first lens element; (2) the electrochromic laminate is disposed on the outermost surface on the eye side of the second lens element.

[0024] A third aspect of the present invention is the ophthalmic lens according to the first aspect, wherein the electrochromic laminate has a spherical shape and a curved surface shape.

[0025] A fourth aspect of the present invention is the ophthalmic lens according to the first aspect, wherein the light guide member is in a flat plate shape having two flat surfaces, the first lens element is a positive lens having a positive power that is the reciprocal of a prescribed distance, and a surface of the positive lens adjacent to the flat surface of the light guide member is flat, the second lens element is a negative lens having a negative power that is the reciprocal of the prescribed distance, and a surface of the negative lens adjacent to the flat surface of the light guide member is flat, the absolute values of the positive power and the negative power are the same, the first lens element includes the electrochromic laminate, the electrochromic laminate includes a support and an electrochromic thin film laminated on the surface of the support, the electrochromic thin film includes: a first substrate and a second substrate; an electrochromic layer sandwiched between the first substrate and the second substrate, the materials of the first substrate and the second substrate are polycarbonate, and the material of the first lens element is polycarbonate.

[0026] A fifth aspect of the present invention is a spectacle lens according to the first aspect, wherein the light guide member is in the form of a flat plate having two flat surfaces, the first lens element is a positive lens having a positive diopter which is the reciprocal of a prescribed distance, and a surface of the positive lens adjacent to the flat surface of the light guide member is flat, the second lens element includes a single functional composite lens, the spherical diopter of the functional composite lens is a value obtained by adding a negative diopter which is the reciprocal of the prescribed distance and the spherical diopter of a prescription value, and a surface of the functional composite lens adjacent to the flat surface of the light guide member is flat, the absolute values of the positive diopter and the negative diopter are the same, and the first lens element includes the electrochromic laminate.

[0027] A sixth aspect of the present invention is a spectacle lens, wherein when a real image is obtained by imaging a light beam of external light through a lens element, a prescription value of a wearer is achieved by the lens element, and a virtual image obtained by imaging a light beam that is not external light is displayed at a prescribed distance away from the wearer, and the lens element includes an electrochromic laminate.

[0028] A seventh aspect of the present invention is a pair of spectacles, which includes the spectacle lens according to any one of the first aspect to the sixth aspect and a spectacle frame.

[0029] Hereinafter, preferred aspects will be listed. Each of the following aspects can be combined with the above aspects.

[0030] In order to appropriately provide the above experience to a wearer with presbyopia, a progressive power lens is required. There is also a method in which, in addition to the spectacle lens which is a progressive power lens already owned by the wearer, a spectacle lens that provides the above experience is worn, and further, a pair of spectacles in which the spectacle lens is inserted into a spectacle frame is worn. Hereinafter, this pair of spectacles will also be referred to as an experience spectacle. Hereinafter, the lens of this pair of spectacles will also be referred to as an experience lens.

[0031] On the other hand, a virtual image obtained by imaging a light beam transmitted in the light guide member is distorted due to the progressive effect of the progressive power lens already owned by the wearer.

[0032] Regarding this point, the present inventor has conducted in-depth research, and in order to enable a wearer to appropriately and comfortably experience virtual reality and / or augmented reality using the material of a normal spectacle lens regardless of the location, the following method has been conceived. The method of this insight will be referred to as Method Group 1.

[0033] Another first aspect of the present invention is an ophthalmic lens, which has a front surface on the object side and a back surface on the eye side, and includes: a light guide member; a first lens element adjacent to the light guide member on the object side; a second lens element adjacent to the light guide member on the eye side; when a real image is formed by imaging the light beam passing through 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 obtained by imaging the light beam transmitted through the light guide member and passing through the second lens element is displayed at a predetermined distance away from the wearer, and the first lens element has a progressive power lens that realizes the addition as one of the prescription values of the wearer.

[0034] Another second aspect of the present invention is an ophthalmic lens according to the another first aspect, wherein the first lens element is a progressive power lens that realizes the addition in the prescription value, and the second lens element realizes a value other than the addition in the prescription value.

[0035] Another third aspect of the present invention is an ophthalmic lens according to the another first aspect, wherein the light guide member is in a flat plate shape having two flat surfaces, the first lens element includes a single progressive power lens and is a plus lens, and the surface of the plus lens adjacent to the flat surface of the light guide member is flat, the second lens element includes a single minus lens, and the surface of the minus lens adjacent to the flat surface of the light guide member is flat.

[0036] In the case of appropriately providing the above experience for refractive abnormalities of the eye, there is also a way of wearing the above experience glasses in addition to the ophthalmic lens (such as a single focus lens) already owned by the wearer. On the other hand, a gap is generated between the ophthalmic lens already owned by the wearer and the above experience lens. When a gap is generated between the two lenses, the viewing angle that the wearer can see is reduced.

[0037] Regarding this point, the present inventor has conducted in-depth research, and in order to enable the wearer to appropriately and comfortably experience virtual reality and / or augmented reality images regardless of the location by using the material of the ordinary ophthalmic lens, the following method is conceived. The method of this insight is called Method Group 2.

[0038] Another fourth aspect of the present invention is an ophthalmic lens having an object side surface and an eyeball side surface, and comprising: a light guide member; a first lens element adjacent to the light guide member on the object side; a second lens element adjacent to the light guide member on the eyeball side; when a real image is obtained by imaging a light beam passing through the first lens element and the second lens element, the prescription value of the wearer is achieved by using the first lens element and the second lens element, and a virtual image obtained by imaging a light beam transmitted through the light guide member and passing through the second lens element is displayed at a predetermined distance away from the wearer, the first lens element includes a positive lens having a positive diopter equal to the reciprocal of the predetermined distance, and the second lens element includes a single functional composite lens having a diopter obtained by adding a negative diopter equal to the reciprocal of the predetermined distance and a spherical diopter as one of the prescription values.

[0039] Another fifth aspect of the present invention is an ophthalmic lens according to the another fourth aspect, wherein the light guide member is plate-shaped with two flat surfaces, the surface of the positive lens adjacent to the flat surface of the light guide member is flat, and the surface of the functional composite lens adjacent to the flat surface of the light guide member is flat.

[0040] Using a non-variable focus lens made of the material of a normal ophthalmic lens means using the material of a normal ophthalmic lens (for example, a material made of plastic or glass). Among each wearer, the presence or absence and degree of refractive abnormalities are different. In addition, the distance at which the virtual image is displayed (referring to the distance away from the wearer, the same hereinafter) also varies depending on the type and display condition of the virtual image to be displayed. Using a single non-variable focus lens means that it is impossible to cope with various situations of each wearer and virtual image.

[0041] Regarding this point, the present inventor has conducted in-depth research and, in order to enable the wearer to appropriately and comfortably experience virtual reality and / or augmented reality images regardless of the location using the material of a normal ophthalmic lens, has come up with the following approach. The approach of this insight is referred to as Approach Group 3.

[0042] Another sixth aspect of the present invention is a pair of glasses, which includes spectacle lenses and a spectacle frame. The spectacle lenses have an object-side surface and an eyeball-side surface, and further include: a light guide member; a first lens element adjacent to the light guide member on the object side; and a second lens element adjacent to the light guide member on the eyeball side. When a real image is formed by imaging the light beam passing through the first lens element and the second lens element, the prescription value of the wearer is achieved by using the first lens element and the second lens element, and a virtual image formed by imaging the light beam transmitted in the light guide member and passing through the second lens element is displayed at a prescribed distance away from the wearer. At least one of the first lens element and the second lens element is detachable.

[0043] A seventh aspect of the present invention is the glasses according to the sixth aspect, wherein at least the second lens element is detachable.

[0044] An eighth aspect of the present invention is the glasses according to the sixth or seventh aspect, wherein the spectacle frame has at least one of a first lens element holder and a second lens element holder. The first lens element holder has a mechanism for detachably mounting the first lens element, and the second lens element holder has a mechanism for detachably mounting the second lens element.

[0045] The above aspects can be appropriately combined.

[0046] Hereinafter, another aspect of the present invention is listed in view of the lens elements in the above aspect groups. The following aspects can be appropriately combined with the above aspects.

[0047] An eighth aspect of the present invention is a lens element, which includes: a first lens element, which is a single progressive power lens for achieving the addition in the prescription value, that is, a positive lens having a prescribed positive degree at the progressive start point; and a second lens element, which is a single negative lens for achieving the value other than the addition in the prescription value, that is, a negative lens having a negative degree with an absolute value equivalent to the positive degree.

[0048] A ninth aspect of the present invention is a lens element, which includes: a first lens element, which is a positive lens having a prescribed positive degree; and a second lens element, which is a single functional composite lens having a degree obtained by adding a negative degree with an absolute value equivalent to the positive degree and a spherical degree as one of the prescription values.

[0049] A tenth aspect of the present invention is the lens element according to the ninth aspect, wherein the first lens element is a single progressive power lens for achieving the addition in the prescription value, that is, a positive lens having a prescribed positive degree at the progressive start point.

[0050] The eleventh aspect of the present invention is a lens element according to any one of the eighth to tenth aspects, wherein the first lens element has two principal surfaces, the second lens element has two principal surfaces, and one principal surface of the first lens element and one principal surface of the second lens element are both flat.

[0051] The twelfth aspect of the present invention is a lens element which is a single functional composite lens having a power obtained by adding a spherical power, which is one of the prescription values, and a negative power of -0.25 D or less.

[0052] The thirteenth aspect of the present invention is a lens element according to the twelfth aspect, wherein the lens element has two principal surfaces, and one principal surface is flat.

[0053] Hereinafter, other aspects of the present invention will be listed. For the following aspects, the above aspects can also be appropriately combined.

[0054] The second lens element can achieve at least one of an astigmatic power other than 0 D and a prism power other than 0Δ in the prescription values. At this time, the first lens element can have a positive power that is the reciprocal of the specified one distance at least at the center of the lens. In Mode Group 1, it is also possible to have a progressive surface that maintains this positive power at the center of the lens and realizes the addition power.

[0055] In Mode Group 1, the case where the first lens element includes a progressive refractive power lens is listed, but other functional lenses (such as dimming lenses) can also be provided together with or instead of the progressive refractive power lens.

[0056] An eyeglass frame in which spectacle lenses are inserted, the spectacle lenses having an object-side surface and an eyeball-side surface, and comprising: a light guide member; a first lens element adjacent to the light guide member on the object side; a second lens element adjacent to the light guide member on the eyeball side; when a real image is obtained by imaging a light beam passing through 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 obtained by imaging a light beam that is transmitted through the light guide member and passes through the second lens element is displayed at a specified one distance away from the wearer, and the eyeglass frame includes at least one of a first lens element holder and a second lens element holder, the first lens element holder having a mechanism for detachably mounting the first lens element, and the second lens element holder having a mechanism for detachably mounting the second lens element.

[0057] A virtual image display system including the above spectacle lenses and an image light emitting unit that emits image light, and a program for causing a computer to perform the functions brought about by the system.

[0058] (In the case where the electrochromic laminate is not provided on the spectacle lens, Mode Group 1)

[0059] "A method of manufacturing (or designing) a spectacle lens, the spectacle lens having a front surface on the object side and a rear surface on the eyeball side, and including a light guide member; a first lens element adjacent to the light guide member on the object side; a second lens element adjacent to the light guide member on the eyeball side; the light guide member being a flat plate having two flat surfaces, the first lens element including a positive lens, and the surface of the positive lens adjacent to the flat surface of the light guide member being flat, the second lens element including a negative lens, and the surface of the negative lens adjacent to the flat surface of the light guide member being flat, wherein the method of manufacturing (or designing) the spectacle lens includes: Step 1, setting the shape of the surface on the eyeball side of the spectacle lens, which is the surface of the second lens element opposite to the surface adjacent to the flat surface of the light guide member, to a curved surface shape having a negative power capable of displaying a virtual image at a predetermined distance away from the wearer; Step 2, setting the shape of the surface on the object side of the spectacle lens, which is the surface of the first lens element opposite to the surface adjacent to the flat surface of the light guide member, to a curved surface shape having a positive power with an absolute value equal to that of the negative power; Step 3, resetting the shape of the surface on the object side of the spectacle lens, which is the surface of the first lens element opposite to the surface adjacent to the flat surface of the light guide member, so as to have an addition as one of the prescription values of the wearer."

[0060] (In the case where the electrochromic laminate is not provided on the spectacle lens, Mode Group 2)

[0061] "A method of manufacturing (or designing) a spectacle lens, the spectacle lens having an object-side surface and an eye-side surface and including a light guide member; a first lens element adjacent to the light guide member on the object side; a second lens element adjacent to the light guide member on the eye side; the light guide member being in the form of a flat plate having two flat surfaces, the first lens element including a positive lens, and the surface of the positive lens adjacent to the flat surface of the light guide member being flat, the second lens element including a negative lens, and the surface of the negative lens adjacent to the flat surface of the light guide member being flat, wherein the method of manufacturing (or designing) the spectacle lens includes: Step 1, setting the shape of the surface of the second lens element opposite to the surface adjacent to the flat surface of the light guide member, i.e., the eye-side surface of the spectacle lens, as a curved surface shape having a negative power capable of displaying a virtual image at a predetermined distance away from the wearer; Step 2, setting the shape of the surface of the first lens element opposite to the surface adjacent to the flat surface of the light guide member, i.e., the object-side surface of the spectacle lens, as a curved surface shape having a positive power with an absolute value equal to that of the negative power; Step 3, resetting the shape of the surface of the second lens element opposite to the surface adjacent to the flat surface of the light guide member by adding the negative power and a spherical power which is one of the prescription values."

[0062] (Relative to Mode Group 3 when no electrochromic laminate is provided on the spectacle lens)

[0063] "A method of manufacturing (or designing) a pair of glasses, the pair of glasses including a spectacle lens and a frame, the spectacle lens having an object-side surface and an eye-side surface and including a light guide member; a first light-emitting element adjacent to the light guide member on the object side; a second lens element adjacent to the light guide member on the eye side; the light guide member being in the form of a flat plate having two flat surfaces, the first lens element including a positive lens, and the surface of the positive lens adjacent to the flat surface of the light guide member being flat, the second lens element including a negative lens, and the surface of the negative lens adjacent to the flat surface of the light guide member being flat, wherein the method of manufacturing (or designing) the pair of glasses includes: Step 1, setting the shape of the surface of the second lens element opposite to the surface adjacent to the flat surface of the light guide member, i.e., the eye-side surface of the spectacle lens, as a curved surface shape having a negative power capable of displaying a virtual image at a predetermined distance away from the wearer; Step 2, setting the shape of the surface of the first lens element opposite to the surface adjacent to the flat surface of the light guide member, i.e., the object-side surface of the spectacle lens, as a curved surface shape having a positive power with an absolute value equal to that of the negative power, and at least one of the first lens element and the second lens element being detachable and attachable."

[0064] (In the case where an electrochromic laminate is provided with respect to an eyeglass lens)

[0065] In the case where an electrochromic laminate is provided, the following steps are further included for each of the above manufacturing methods (or design methods).

[0066] "Step 4, an electrochromic laminate is provided on at least any one of the first lens element and the second lens element"

[0067] Advantageous Effects of the Invention

[0068] According to an embodiment of the present invention, by using the material of a normal eyeglass lens, a wearer can appropriately and comfortably experience virtual reality and / or augmented reality regardless of the location. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] Figure 1 It is a schematic horizontal cross-sectional view showing that an eyeglass lens according to one aspect of the present invention functions as part of a virtual image display system.

[0070] Figure 2 It is a schematic partial horizontal cross-sectional view of a light guide member and a first lens element of an eyeglass lens according to one aspect of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0071] Hereinafter, one aspect of the present invention will be described. "~" means equal to or more than a specified value and equal to or less than a specified value. The description of each reference numeral is given in this specification, but is omitted herein.

[0072] [One Aspect of the Present Invention]

[0073] One aspect of the present invention relates to a system capable of enabling a wearer to experience virtual reality and / or augmented reality, that is, an eyeglass lens, glasses, and a lens element related to a system that can be worn on a user's head.

[0074] The system according to one aspect of the present invention includes an image light emitting unit that emits image light and the following eyeglass lens. The image light emitting unit is a component having a structure required for emitting image light, such as a light source and a projection lens. Similar to a real image, a light beam of the image light passes through the pupil of the wearer and forms an image on the retina, whereby the wearer recognizes a virtual image. The virtual image is not limited and may be a moving image or a still image.

[0075] The system may be a head-mounted display or smart glasses. Hereinafter, the case where the system is smart glasses will be exemplified. One aspect of the present invention is also the eyeglass lens in the smart glasses.

[0076] Based on Figure 1 An eyeglass lens according to one aspect of the present invention will be described.Figure 1 This is a schematic horizontal cross-sectional view showing a spectacle lens according to an embodiment of the present invention functioning as part of a virtual image display system. Each reference numeral is as described in the description item of the reference numerals in this specification. The description of reference numerals is omitted in this specification.

[0077] A spectacle 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 face each other. When viewed from the surface on the object side, the portion of the surface that is opposite in the optical axis direction 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 in the optical axis direction is the surface on the object side.

[0078] In this specification, the y-direction is the direction along the meridian and is the vertical direction. The upper part of the lens in the worn state is set as the +y direction, and the lower part of the lens is set as the -y direction. The x-direction is the direction orthogonal to the meridian and 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.

[0079] In addition, a feature of an embodiment of the present invention is that the variable focus lens described in Patent Document 1 is set as a non-variable focus lens. For example, structures other than the technology related to the optical part described in Patent Document 1 (specific structures of the light source, projection lens, light guide member (or waveguide), drive control unit of the system, etc.) can also adopt known structures, so detailed description is omitted.

[0080] A spectacle lens according to an embodiment of the present invention has: a light guide member; a first lens element adjacent to the light guide member on the object side; and a second lens element adjacent to the light guide member on the eyeball side.

[0081] A light guide member according to an embodiment of the present invention may include: a portion through which the light beam actually passes inside (also referred to as a waveguide in this specification); and a portion that covers and protects the waveguide.

[0082] The first lens element is adjacent to the light guide member on the object side. The second lens element is adjacent to the light guide member on the eyeball side. The term "adjacent" as used in this specification includes a state of physical contact with the light guide member and also includes a state of non-contact but close proximity (for example, the maximum separation distance at the geometric center of the lens is 8 mm or 5 mm or 3 mm).

[0083] Both 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 include a hard coat, an antireflection layer, an antifouling layer, etc. Specific examples of "plastic" include polycarbonate and polystyrene. The refractive index of the first lens element and the second lens element may be in the range of 1.53 to 1.67. The material of the first lens element and the material of the second lens element may be the same (for example, both are polycarbonate), or different.

[0084] A pair of spectacle lenses according to one embodiment of the present invention has a perspective function. Therefore, when a real image is obtained by imaging a light beam passing through the first lens element and the second lens element, the prescription value of the wearer is achieved by using the first lens element and the second lens element. The prescription value of the wearer is achieved by the refractive index and the surface shape of the materials of the first lens element and the second lens element, respectively.

[0085] Moreover, the virtual image obtained by imaging the light beam that is transmitted through the light guide member and passes through the second lens element is displayed at a predetermined distance away from the wearer by using the second lens element. This predetermined distance is also referred to as the "display distance".

[0086] As Figure 1 shown, the light beam of the virtual image passes through the second lens element, not the first lens element. Therefore, for the second lens element, it is only necessary to set a curved surface shape that can display the virtual image at a display distance (for example, 2 m) away from the wearer. As a specific example, it is only necessary to set a concave surface with a power of 0.50 D (= 1 / (2 m)) (i.e., -0.50 D) as the curved surface shape. At the same time, +0.50 D is set for the first lens element. According to this structure, a wearer without refractive abnormality can appropriately see the outside world and can appropriately see the virtual image at a place at the display distance.

[0087] In addition, the prescription value of the wearer is recorded in the lens case of the spectacle lens. This is also the case when the spectacle lens has a light guide member as in one embodiment of the present invention. This is because, in the spectacle lens of one embodiment of the present invention, refractive abnormality is corrected in the confirmation of the outside world, and therefore, it is necessary to record the prescription value. As a result, even the spectacle lens of one embodiment of the present invention is accompanied by a lens case.

[0088] If there is a lens case, it is possible to identify the object as a spectacle lens based on the prescription value of the wearer. Moreover, spectacle lenses are usually sold in sets with lens cases. Therefore, the technical idea of the present invention is also reflected in the spectacle lens accompanied by a lens case, and the same applies to the combination of the lens case and the spectacle lens.

[0089] The prescription values of the wearer can be, for example, the spherical power (S power), the astigmatic power (C power), the astigmatic axis (Ax), and the prism power (Δ) when viewed from the front (infinity). In the case of a progressive refractive power lens, in addition to these, the addition power (ADD) can also be cited. The "addition power" in this specification is the difference between the spherical power when viewed from the front (infinity) and the power required for vision correction when viewing nearby (positive value in this specification).

[0090] The number of lenses constituting the first lens element is not limited. The number of lenses constituting the second lens element is not limited. On the other hand, if the number of lenses is increased, the thickness of the experience lens will increase. Therefore, it is preferable that the lens constituting the first lens element is a single positive lens (the surface on the object side is convex), and the lens constituting the second lens element is a single negative lens (the surface on the eyeball side is concave). Details will be described later.

[0091] In the above example, as the spectacle lens, the surface on the object side is convex, and the surface on the eyeball side is concave. That is, in the above example, the spectacle lens is a meniscus lens.

[0092] Figure 2 It is a schematic partial horizontal cross-section of the light guide member and the first lens element of the spectacle lens according to one embodiment of the present invention.

[0093] One feature of the spectacle lens (experience lens) according to one embodiment of the present invention is that at least one of the first lens element and the second lens element includes an electrochromic laminate.

[0094] The electrochromic laminate is a laminate utilizing the electrochromic phenomenon, in which a redox reaction occurs reversibly by applying a voltage between two electrodes, causing the color to change reversibly. For example, the electrochromic laminate can be used as a spectacle lens, functioning as a sunglasses in a bright place and as a transparent lens in a dark place. It can be automatically adjusted to the optimal brightness through a switch operation.

[0095] The electrochromic laminate has a laminated structure in which an electrochromic thin film having an electrode layer and an electrochromic layer is laminated on the surface of a support.

[0096] The electrochromic laminate is composed of a support and an electrochromic thin film laminated on the surface of the support.

[0097] It is required that the support is transparent and has a high transmittance. The material of the support is not limited, and examples include moldable resin substrates such as polycarbonate resin, acrylic resin, epoxy resin, and phenolic resin, or glass substrates. Among them, from the viewpoints of moldability and manufacturing cost, the support 1 is preferably formed of polycarbonate resin.

[0098] The electrochromic film has: a pair of first and second substrates, a pair of first and second electrode layers provided on the inner surfaces of the first and second substrates respectively, and an electrochromic layer provided between the first and second electrode layers. The electrochromic layer is composed of a reduction layer disposed on the side of the first electrode layer, an oxidation layer disposed on the side of the second electrode layer, and an electrolyte layer provided between the reduction layer and the oxidation layer. Thus, the electrochromic film is laminated in the order of the second substrate / second electrode layer / oxidation layer / electrolyte layer / reduction layer / first electrode layer / first substrate from below.

[0099] The substrate constituting the electrochromic film is in the form of a film or sheet and can be formed of the same resin material as the support. The substrate is also required to be transparent and have a high transmittance, just like the support. The substrate is preferably formed of polycarbonate resin, just like the support.

[0100] As the characteristics required for the electrode layer constituting the electrochromic film, transparency, high transmittance, and excellent conductivity can be cited. To meet such characteristics, the electrode layer is a transparent electrode layer, and it is particularly preferable to use ITO (Indium Tin Oxide).

[0101] For the reduction layer, oxidation layer, and electrolyte layer constituting the electrochromic layer, existing materials can be used.

[0102] The reduction layer is a layer that develops color upon a reduction reaction. Existing reduction electrochromic compounds can be used for the reduction layer. There is no limitation whether it is an organic or inorganic substance. For example, azobenzene-based, anthraquinone-based, diarylethene-based, dihydropyrene-based, bipyridine-based, styryl-based, styrylspiropyran-based, spiroazine-based, spirothiophene-based, thioindigo-based, tetrathiafulvalene-based, terephthalic acid-based, triphenylmethane-based, triphenylamine-based, naphthopyran-based, viologen-based, pyrazoline-based, phenazine-based, phenylenediamine-based, phenazine-based, phenothiazine-based, phthalocyanine-based, fluoran-based, fulgide-based, benzopyran-based, metallocene-based, tungsten oxide, molybdenum oxide, iridium oxide, titanium oxide, etc. can be cited.

[0103] The oxidation layer is a layer that develops color upon an oxidation reaction. Existing oxidation-type electrochromic compounds can be used for the oxidation layer. There is no limitation whether it is an organic or inorganic substance. For example, it can be selected from compositions containing radical polymerizable compounds having triarylamine, Prussian blue-type complexes, nickel oxide, iridium oxide, etc.

[0104] The electrolyte layer has electron insulation and ion conductivity, and is preferably transparent. The electrolyte layer can be a solid electrolyte, gel-like, liquid-like, etc. To maintain high ion conductivity, it is preferably gel-like. Although not limited, for example, existing electrolyte materials such as inorganic ionic salts such as alkali metal salts and alkaline earth metal salts, quaternary ammonium salts, or acids can be used.

[0105] By adopting an electrochromic laminate, the transmittance can be adjusted between about 10% and 90%, and the dynamic range becomes very large. The response time when adjusting the transmittance may be about 5 seconds. It is also easy to process into a spherical shape and a curved surface shape. It is difficult to be affected by the amount of ultraviolet rays and the temperature.

[0106] As a result, in one aspect of the present invention, using the material of a normal spectacle lens, the wearer can appropriately and comfortably experience virtual reality and / or augmented reality regardless of the location.

[0107] The electrochromic laminate preferably satisfies at least any one of the following.

[0108] (1) The electrochromic laminate is disposed on the outermost surface side on the object side in the first lens element.

[0109] (2) The electrochromic laminate is disposed on the outermost surface side on the eyeball side in the second lens element.

[0110] It is particularly preferable to satisfy (1). This is because the wearer uses the first lens element to observe an object in the outside world, and based on changing the transmittance according to the degree of external light in the outside world, it is appropriate that the electrochromic laminate is disposed on the outermost surface side on the object side in the first lens element.

[0111] The "outermost surface side" described in the above paragraph includes both the outermost surface of the lens element and the space between the plastic or glass non-variable focus lens and the outermost surface. As Figure 2 shown, it also includes the case where the electrochromic laminate is disposed between the hard coat and / or the antireflection layer and the plastic or glass non-variable focus lens (more specifically, in contact with the hard coating film and / or the antireflection film).

[0112] On the other hand, the present invention is not limited to the electrochromic laminate being on the outermost surface side. For example, the electrochromic laminate can also be separated from the light guide member and disposed between the outermost surface side on the object side in the first lens element and the light guide member. That is, a structure in which the electrochromic laminate is embedded in the first lens can also be adopted. In other words, a structure in which the electrochromic laminate is clamped by the first lens material (such as polycarbonate) can also be adopted.

[0113] The electrochromic laminate is in a sheet shape, preferably in a spherical shape and a curved surface shape. When the spectacle lens is a single-focus lens, the outermost surfaces of the object side surface and the eyeball side surface are both in a spherical shape. In this case, it is preferable that the electrochromic laminate imitates the shape of its outermost surface and is in a spherical shape and a curved surface shape. Even when the spectacle lens is an progressive power lens, when one of the outermost surfaces is a spherical surface, it is also preferable that the electrochromic laminate imitates the shape of its outermost surface and is in a spherical shape and a curved surface shape. Of course, when the outermost surface of the electrochromic laminate is an progressive refractive surface, it can imitate the shape to be a curved surface shape. On the other hand, it can also be an aspherical shape deviating from a spherical surface, or a toric surface shape.

[0114] The thickness of the electrochromic laminate can be 100 μm or more, can also be less than 1000 μm, and can also be 800 μm or less.

[0115] [Preferred embodiments of the present invention]<Group of embodiments 1>

[0116] One of the features of the group of embodiments 1 is that the first lens element has an progressive power lens that realizes the addition power, which is one of the prescription values of the wearer.

[0117] As described in the above embodiment column, the virtual image obtained by imaging the light beam transmitted in the light guiding member is deformed due to the progressive action of the progressive power lens already owned by the wearer. The countermeasure is to have the above feature of the group of embodiments 1. The first lens element does not allow the light beam of the virtual image to pass through. Focusing on this point, concentrating the progressive component of the progressive power lens on the first lens element that does not allow the light beam of the virtual image to pass through is one of the features of the group of embodiments 1. Through this feature, the presbyopia of the wearer can be corrected, and the virtual image will not be deformed due to the progressive action.

[0118] The addition power in the prescription value is preferably realized by the first lens element as the progressive power lens. In a specific example of the group of embodiments 1, the object side surface of the first lens element is an progressive surface, and 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 are not progressive surfaces. In this case, it can also be said that the addition power is only realized by the first lens element (furthermore, the object side surface of the first lens element).

[0119] Moreover, the values other than the addition power in the prescription value are preferably realized by the second lens element. Of course, the prescription value is realized by the combination of the object side surface and the eyeball side surface of the spectacle lens. On the other hand, in a specific example of the group of embodiments 1, it is preferable to set the object side surface of the first lens element as an progressive surface, and always set the power of the lens center (described later) of the first lens element to the power corresponding to the display distance of the virtual image.

[0120] Moreover, by processing the surface on the eyeball side of the second lens element into a specified shape, when the external light, i.e., the light beam, passing through the first lens element and the second lens element forms an image on the retina of the wearer and enables the wearer to see a real image, a prescription value including the addition is achieved. In this specification, the case where the shape of the second lens element (or the surface on the eyeball side in the case of a single lens) is used to conform to the consistency of the prescription value other than the addition is referred to as "the addition other than the addition in the prescription value is achieved by the second lens element".

[0121] As described in the above paragraph, on the basis of seeing a real image, the first lens element is also indispensable in the achievement of the prescription value. On the other hand, in the example described in this paragraph, in the first lens element, ultimately, it mainly has the function of achieving the addition and the function of a positive power corresponding to the display distance where the virtual image is disposed. Therefore, it can also be said that "the addition other than the addition in the prescription value is achieved by the second lens element" means that "the first lens element does not have a special contribution like the achievement of the prescription value other than the addition in the left and right directions".

[0122] Of course, it is possible to use the first lens element to achieve the addition other than the addition, but in this case, the progressive power lens as the first lens element has a complex surface shape. When such a first lens element is prepared as a fixed focus lens, it may be easier to prepare a variable focus lens.

[0123] Therefore, it is preferable that the first lens element is a progressive power lens that achieves the addition in the prescription value. In addition, it is easier to process the addition other than the addition in the prescription value than to process the progressive component. Therefore, there is no problem in processing the second lens element to reflect the addition other than the addition in the prescription value.

[0124] The light guide member may be plate-shaped with two flat surfaces (main surfaces) opposite to each other in the lens thickness direction. The light guide member may also be bent. It may also be bent into a meniscus shape. However, if the waveguide is bent, the control related to the imaging of the virtual image becomes very difficult. If the surface shape of the portion covering and protecting the waveguide is bent, the volume of the light guide member becomes large. This results in an increase in the edge thickness of the spectacle lens. In the case of adopting the form of glasses (smart glasses), the increase in the edge thickness is not preferable. Therefore, it is preferable that the light guide member is plate-shaped.

[0125] The "plate-shaped" in this specification includes both a complete plate shape and an incomplete plate shape. As an incomplete plate shape, for one of the flat surfaces as the two main surfaces, for example, a shape with a recess provided at a portion connected to the image light exit portion that emits image light is also regarded as plate-shaped. As an example, the case where 50% or more (preferably 80% or more) of the area of each of the two main surfaces of the light guide member exists in the same plane is regarded as plate-shaped.

[0126] On this basis, it is preferable that 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 member is flat. Moreover, it is preferable that the second lens element includes a negative lens, and the surface of the negative lens adjacent to the flat surface of the light guide member is flat.

[0127] If the two main surfaces of the light guide member are curved surfaces, the surface of the first lens element adjacent to the light guide member also needs to be shaped to imitate the curved surface. This is because an unexpected refractive power is also generated between the first lens element and the light guide member. Therefore, in the first lens element, it is necessary to process one surface to reflect the progressive component, and it is troublesome to process it into a shape imitating the curved surface of the light guide member. Thus, if the light guide member is made flat from the beginning, there is no need to process it into a curved surface shape. The content of this paragraph also applies to the second lens element.

[0128] Hereinafter, a specific example is given assuming that the light guide member is flat and the virtual image is separated by 2 m for display.

[0129] On the object side surface of the first lens element, which is a progressive power lens, the diopter is set to +0.50 D 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 directly below it. Moreover, when the addition in the prescription value of a presbyopic wearer is 1.50 D, it is set to 2.00 D at the near vision diopter measurement reference point. The surface of the first lens element on the eyeball side is flat (plano). That is, the first lens element is a positive lens.

[0130] In addition, the measurement reference point F, the fitting point or the viewing point FP, and the measurement reference point N can be located by referring to the marking chart (Remark chart) or the centration chart issued by the lens manufacturer.

[0131] The surface of the second lens element on the eyeball side has a shape other than the addition in the prescription value reflected. For example, when the S diopter in the prescription value is -3.00 D and the C diopter is 0.00 D, it is set to a concave shape of -3.50 D obtained by adding -0.50 D for separating the virtual image by 2 m for display and the S diopter of -3.00 D. 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.

[0132] The content described in the items of Mode Group 1 can be appropriately combined with other mode groups and modification examples.

[0133] <Mode Group 2>

[0134] One of the features of Mode Group 2 is that the second lens element has a diopter obtained by adding the diopter corresponding to the display distance (in the above example, -0.50D) and the spherical diopter which is one of the prescription values. That is, one of the features of Mode Group 2 is that, for the second lens element, the lens element that functions to display a virtual image at a predetermined distance and the lens element that functions to correct the refractive anomaly of the wearer are integrated.

[0135] As described in the above mode section, a gap is generated between the spectacle lens already owned by the wearer and the above experience lens. When a gap is generated between the two lenses, the viewing angle that the wearer can see is reduced. The countermeasure is to have the above features of Mode Group 2. Due to this feature, no gap is generated between the two lenses, and the viewing angle that the wearer can see is not reduced.

[0136] The specific structure of Mode Group 2 is as follows. The first lens element includes a positive lens having a positive diopter that is the reciprocal of the specified one distance. And, the second lens element includes a single functional composite lens, and this functional composite lens has a diopter obtained by adding the negative diopter that is the reciprocal of the specified one distance and the spherical diopter which is one of the prescription values.

[0137] In the case where the specific numerical examples used in Mode Group 1 and the example where the light guide member is plate-shaped are also adopted in Mode Group 2, the first lens element includes a positive lens with the surface on the object side being +0.50D (the reciprocal of the display distance and a positive diopter) and the surface on the eyeball side, that is, the surface adjacent to the light guide member, being 0D (plano). The second lens element includes a single negative lens with the surface on the eyeball side being a concave shape with a negative diopter, that is, -3.50D (= -0.50D + (-3.00D)), and the surface on the object side, that is, the surface adjacent to the light guide member, being 0D (plano).

[0138] It should be noted that in the example in the above paragraph, a single negative lens having a negative diopter obtained by adding the negative diopter that is the reciprocal of the display distance and the spherical diopter which is one of the prescription values is listed, but it is not limited thereto. For example, when the S diopter of the prescription value is +3.00D, the surface on the eyeball side becomes a convex shape (positive lens) with a positive diopter, that is, +2.50D (= -0.50D + 3.00D). In addition, when the S diopter of the prescription value is +0.50D, the surface on the eyeball side is 0D (= -0.50D + 0.50D). When the light guide member is plate-shaped, as a result, the second lens element includes a single disc-shaped lens. The lens included in the second lens element in this case is collectively referred to as a "functional composite lens".

[0139] The content described in the items of Mode Group 2 can be appropriately combined with other mode groups and modification examples.

[0140] <Mode Group 3>

[0141] Mode Group 3 is a mode focused on glasses (smart glasses). One of the characteristics of Mode Group 3 is that at least one of the first lens element and the second lens element (at least the second lens element, and in some cases both lens elements) can be detached and attached to and from the glasses. Hereinafter, a case where both lens elements can be detached and attached to and from the glasses is exemplified, but it is also possible that only one of the two lens elements can be detached and attached, and in particular, it is also possible that only the second lens element can be detached and attached. Therefore, the present invention is not limited to this example.

[0142] As described in the above mode column, using a single non-variable focus lens means that it is impossible to cope with various situations of each wearer and virtual images. The countermeasure is to prepare a variety of first lens elements and the second lens element.

[0143] Regarding the first lens element, in the case of adopting Mode Group 1, the first lens element has a progressive power lens. That is, it is necessary to prepare a variety of progressive power lenses. Of course, it is also possible to manufacture the first lens element after the glasses (smart glasses) are ordered, but it is not realistic to make different progressive surfaces each time an order is received in terms of work efficiency. Therefore, it is realistic to prepare semi-finished lenses with a progressive surface having a specified addition formed in advance on the object side surface.

[0144] Assuming that semi-finished lenses that also reflect prescription values other than the addition are prepared, it is necessary to prepare semi-finished lenses of types corresponding to the number of combinations of each prescription value.

[0145] On the other hand, in the case of adopting Mode Group 1, it is sufficient to prepare fewer types of semi-finished lenses. This is because the progressive power lens in Mode Group 1 realizes the addition in the prescription value. If it is a progressive power lens that realizes the addition, compared with the case where it also reflects prescription values other than the addition, the types of semi-finished lenses prepared are significantly reduced.

[0146] If the light guide member is flat, the surface of the first lens element on the eyeball side also becomes flat. If the opposite surface of the progressive surface of the semi-finished lens is made flat, even the effort of new processing can be omitted.

[0147] Regarding the second lens element, in the case of adopting Mode Group 2, the second lens element has a negative lens, and the negative lens has a negative power obtained by adding the negative power of the reciprocal of the specified one distance to the spherical power which is one of the prescription values. If it is a negative lens, it is easy to process from a lens blank by existing techniques. If the light guide member is flat, the surface of the second lens element on the object side also becomes flat, making processing even easier.

[0148] There is no limitation on the specific structure for detaching and attaching the first lens element and / or the second lens element to and from the glasses. For any structure of the glasses, it is only necessary to provide a mechanism capable of switching between holding and detaching the first lens element and / or the second lens element. This mechanism may be provided in the light guide member, but although the light guide member is protected, it is still a precision component, and it is not preferable to apply the impact of detachment and attachment every time. Therefore, it is preferable to provide this mechanism on the spectacle frame. It is preferable to provide this mechanism on the rim of the spectacle frame that is close to the spectacle lens in position.

[0149] As a specific example of the above mechanism, for example, in the glasses, on the basis of using a semi-rim only on the upper side, in the upper rim, the light guide member is fixed to the rim, and a groove and a stopper capable of holding and detaching the first lens element and the second lens element sandwiching the light guide member are provided.

[0150] As another specific example of the above mechanism, for example, in the glasses, on the basis of using a full rim that covers the entire circumference of the spectacle lens, a groove with a cover is provided on the upper rim, the light guide member is fixed to the rim, and the first lens element and the second lens element sandwiching the light guide member can be inserted into and detached from the groove.

[0151] <Variant example>

[0152] The embodiments of the present invention have been described above, but the above disclosure represents 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 gist thereof. In addition, for the following variant examples, the above disclosure can also be arbitrarily selected and combined.

[0153] 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 even when the C power is a value other than this. Specifically, it is only necessary to make the surface on the eyeball side of the second lens element a toric surface corresponding to the C power and the astigmatism axis Ax. In addition, when the prism power Δ exists as a prescription value, it is only necessary to reflect the shape corresponding to the prism power Δ on the surface on the eyeball side of the second lens element.

[0154] That is, the second lens element can also achieve at least any one of the astigmatism power other than 0D and the prism power other than 0Δ in the prescription value. At this time, the first lens element can have a positive power that is the reciprocal of the specified distance at least at the center of the lens. In the first group of aspects, it can also have a progressive surface that maintains this positive power at the center of the lens and realizes the addition power.

[0155] In one aspect of the present invention, for ease of explanation, the technical content will be described in a manner applicable to the case where the surface shape of the second lens element is spherical. On the other hand, the surface shape of the second lens component in one aspect of the present invention may be spherical or other shapes (e.g., toric surface, shape corresponding to the prism diopter Δ).

[0156] In Mode Group 1, it is sufficient that the object-side surface of the progressive refractive power lens included in the first lens element is an aspherical progressive surface. The surface of the first lens element adjacent to the light guide member (e.g., the eye-side surface of the progressive refractive power lens) and the surface of the second lens element adjacent to the light guide member only need to be shaped after the main surface of the light guide member. Moreover, the eye-side surface of the second lens element only needs to be a shape that realizes prescription values other than the addition power, and it can be either spherical or aspherical.

[0157] In Mode Group 2, the object-side surface of the positive lens included in the first lens element may be an aspherical surface, i.e., a progressive surface, as in Mode Group 1, or a spherical surface. The surface of the first lens element adjacent to the light guide member (e.g., the eye-side surface of the positive lens) and the surface of the second lens element adjacent to the light guide member (e.g., the object-side surface of the function synthesis lens) only need to be shaped after the main surface of the light guide member. Moreover, the eye-side surface of the function synthesis lens only needs to have a power obtained by adding the negative power corresponding to the display distance and the spherical power, and it can be either spherical or aspherical. Similar to the second lens element in Mode Group 1, as long as the shape of the eye-side surface of the function synthesis lens is used to conform to the consistency of the prescription value, the shape of the eye-side surface of the function synthesis lens is not limited. In Mode Group 2, all prescription values including the addition power can also be realized by the function synthesis lens.

[0158] In Mode Group 1, the case where the first lens element includes a progressive refractive power lens is exemplified, but other functional lenses (e.g., dimming lens) may be provided together with or instead of the progressive refractive power lens.

[0159] In Mode Group 1, one of the features is that the first lens element includes a progressive refractive power lens and does not need to have the features of Mode Group 2 and Mode Group 3. For example, in Mode Group 1, the second lens element may also separate the lens element that functions to display a virtual image at a predetermined distance from the lens element that functions to correct the refractive abnormality of the wearer. In addition, the first lens element and / or the second lens element may not be detachable from the glasses.

[0160] Similarly, it is not necessary to have the features of Mode Groups 1 to 3 in Mode Group 2. For example, in Mode Group 2, the first lens element may not include a progressive power lens, and all prescription values may be achieved by the second lens element. Additionally, the first lens element and / or the second lens element may not be detachable from the glasses.

[0161] Similarly, it is not necessary to have the features of Mode Groups 1 and 2 in Mode Group 3.

[0162] However, as described in the items of each mode group, the structures of each mode group bring greater advantages. Therefore, it is preferred to combine the structures of each mode group arbitrarily, and it is more preferred to combine a part or all of the contents described in the items of each mode group.

[0163] As described in the common items of Mode Groups 1 to 3, one feature of one embodiment 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 idea of the present invention is also reflected in the lens elements adopted in each mode group.

[0164] The structure of the lens element in Mode Group 1 is as follows.

[0165] "A lens element, comprising: a first lens element, which is a progressive power lens that realizes the addition in the prescription value, that is, a positive lens having a prescribed positive power at the progressive start point; a second lens element, which is a negative lens that realizes the value other than the addition in the prescription value, that is, a negative lens having a negative power whose absolute value is equivalent to the positive power."

[0166] It should be noted that the "degrees with equivalent absolute values" in this specification includes both the case where the degrees are exactly the same and the case where they are within the tolerance range of the degrees of the spectacle lenses (for example, ±0.12D).

[0167] The structure of the lens element in Mode Group 2 is as follows.

[0168] "A lens element, comprising: a first lens element, which is a positive lens having a prescribed positive power; a second lens element, which is a negative lens having a negative power obtained by adding a negative power whose absolute value is equivalent to the positive power and a spherical power that is one of the prescription values."

[0169] It is further preferred to have the following configuration.

[0170] "The first lens element is a progressive power lens that realizes the addition in the prescription value, that is, a positive lens having a prescribed positive power at the progressive start point."

[0171] Based on the above structure, the structure of the lens element in which the light guide member is in a flat plate shape is as follows.

[0172] "The first lens element has two principal surfaces, and the second lens element has two principal surfaces. One principal surface of the first lens element (the surface on the eyeball side in one aspect of the present invention) and one principal surface of the second lens element (the surface on the object side in one aspect of the present invention) are both flat."

[0173] One of the features of Mode Group 2 lies in the second lens element. The structure of the lens element in view of this is as follows.

[0174] "It is a lens element that is a single negative lens having a negative power obtained by adding the spherical power, which is one of the prescription values, and a negative power of -0.25 D or less."

[0175] On this basis, the following configuration is preferably provided.

[0176] "The above lens element has two principal surfaces, and one principal surface (the surface on the object side in one aspect of the present invention) is flat."

[0177] Regarding Mode Group 3, its feature also lies in the spectacle frame, which has a structure that enables the first lens element and / or the second lens element to be detachably attached to and detached from the spectacle. The structure in view of this is as follows.

[0178] "A spectacle frame that incorporates spectacle lenses, the spectacle lenses having a surface on the object side and a surface on the eyeball side, and comprising: a light guide member, a first lens element adjacent to the light guide member on the object side; a second lens element adjacent to the light guide member on the eyeball side; when a real image is obtained by imaging the light beam passing through the first lens element and the second lens element, the prescription value of the wearer is achieved by using the first lens element and the second lens element, and a virtual image obtained by imaging the light beam transmitted through the light guide member and passing through the second lens element is displayed at a predetermined distance away from the wearer. The spectacle frame includes at least one of a first lens element holder and a second lens element holder (preferably at least the second lens element holder), the first lens element holder having a mechanism for detachably attaching and detaching the first lens element, and the second lens element holder having a mechanism for detachably attaching and detaching the second lens element."

[0179] The following specific structure is also preferred.

[0180] "A spectacle lens (or its design method, manufacturing method), the spectacle lens having an object side surface and an eyeball side surface, and comprising a light guiding member; a first lens element adjacent to the light guiding member on the object side; a second lens element adjacent to the light guiding member on the eyeball side; the light guiding member being a flat plate shape having two flat surfaces, the first lens element being a positive lens having a positive power that is the reciprocal of a specified distance, and the surface of the positive lens adjacent to the flat surface of the light guiding member being flat, the second lens element being a negative lens having a negative power that is the reciprocal of the specified distance, and the surface of the negative lens adjacent to the flat surface of the light guiding member being flat, the absolute values of the positive power and the negative power being the same, when obtaining a real image by imaging of light beams passing through the first lens element and the second lens element, realizing the prescription value of the wearer by using the first lens element and the second lens element, and displaying a virtual image obtained by imaging of light beams transmitted in the light guiding member and passing through the second lens element at a distance away from the wearer by the specified distance, the first lens element comprising an electrochromic laminate, the electrochromic laminate comprising a support and an electrochromic thin film laminated on the surface of the support, the electrochromic thin film comprising a first substrate, a second substrate, and an electrochromic layer sandwiched between the first substrate and the second substrate, the materials of the first substrate and the second substrate being polycarbonate, and the material of the first lens element being polycarbonate."

[0181] The following specific structure reflecting Mode Group 2 is also preferred.

[0182] "A spectacle lens (or its design method, manufacturing method), wherein the light guiding member is a flat plate shape having two flat surfaces, the first lens element comprises a positive lens having a positive power that is the reciprocal of a specified distance, and the surface of the positive lens adjacent to the flat surface of the light guiding member is flat, the second lens element comprises a single functional composite lens, the spherical power of the functional composite lens being a value obtained by adding the negative power that is the reciprocal of the specified distance and the spherical power of the prescription value, and the surface of the functional composite lens adjacent to the flat surface of the light guiding member is flat, the absolute values of the positive power and the negative power being the same, and the first lens element comprises the electrochromic laminate."

[0183] In the present invention, the technical idea is also reflected in a virtual image display system having the above spectacle lens and an image light emitting unit that emits image light, and a program for causing a computer to perform the functions brought about by the system.

[0184] Other structures of the present invention are as follows.

[0185] "A spectacle lens, when obtaining a real image by imaging a light beam of external light passing through a lens element, realizes a prescription value of a wearer by using the lens element, and displays a virtual image obtained by imaging a light beam that is not external light at a prescribed distance away from the wearer. The lens element includes an electrochromic laminate."

[0186] In the above structure, a light guide member is not essential. Instead of the light guide member, a planar waveguide type laser module (for example, https: / / www.tdk.com / ja / featured_stories / entry_022.html) may be adopted. The above "light beam that is not external light" refers to laser light when the laser module is used as a light source. The laser light may also be reflected by the surface on the eyeball side of the lens element (the second lens element in the present embodiment) to form a virtual image on the retina of the wearer. At this time, the laser module may also be controlled so as to be displayed at a prescribed distance away from the wearer (including the case of only one distance). Further, the laser module may be used as a light source, and the lens element (the first lens element and / or the second lens element in the present embodiment) includes an electrochromic laminate that has been extended so far."

[0187] In the present invention, the technical idea is also reflected in the design method and manufacturing method of the spectacle lens in at least any one of the above mode groups 1-3. The design method or the manufacturing method may also be applicable to the case where an electrochromic laminate is provided for the spectacle lens in at least any one of the above mode groups 1-3. On the other hand, it may also be applicable to the case where an electrochromic laminate is not provided for the spectacle lens in at least any one of the above mode groups 1-3."

[0188] Other structures of the present invention are as follows. The following other structures can be combined with each other. In addition, the content described so far (especially the description content of mode groups 1-3 and the content of the electrochromic laminate, the above "preferred specific configuration") can be cited in the design method or the manufacturing method."

[0189] (For mode group 1 in the case where an electrochromic laminate is not provided for the spectacle lens)

[0190] "A method of manufacturing (or designing) an ophthalmic lens, the ophthalmic lens having an object side surface and an eye side surface, and including a light guiding member; a first lens element adjacent to the light guiding member on the object side; a second lens element adjacent to the light guiding member on the eye side; the light guiding member being a flat plate having two flat surfaces, the first lens element including a positive lens, and the surface of the positive lens adjacent to the flat surface of the light guiding member being flat, the second lens element including a negative lens, and the surface of the negative lens adjacent to the flat surface of the light guiding member being flat, wherein the method of manufacturing (or designing) the ophthalmic lens includes: Step 1, setting the shape of the surface of the second lens element that faces the surface adjacent to the flat surface of the light guiding member, i.e., the eye side surface of the ophthalmic lens, as a curved surface shape having a negative power capable of displaying a virtual image at a prescribed distance away from the wearer; Step 2, setting the shape of the surface of the first lens element that faces the surface adjacent to the flat surface of the light guiding member, i.e., the object side surface of the ophthalmic lens, as a curved surface shape having a positive power with an absolute value equal to that of the negative power; Step 3, resetting the shape of the surface of the first lens element that faces the surface adjacent to the flat surface of the light guiding member, i.e., the object side surface of the ophthalmic lens, so as to have an addition power which is one of the prescription values of the wearer."

[0191] (Relative to the case where no electrochromic laminate is provided on the ophthalmic lens, Mode Group 2)

[0192] "A method of manufacturing (or designing) a spectacle lens, the spectacle lens having an object side surface and an eyeball side surface, and comprising a light guiding member; a first lens element adjacent to the light guiding member on the object side; a second lens element adjacent to the light guiding member on the eyeball side; the light guiding member being a flat plate shape having two flat surfaces, the first lens element comprising a positive lens, and the surface of the positive lens adjacent to the flat surface of the light guiding member being flat, the second lens element comprising a negative lens, and the surface of the negative lens adjacent to the flat surface of the light guiding member being flat, wherein the method of manufacturing (or designing) the spectacle lens has: Step 1, setting the shape of the surface of the second lens element opposite to the surface adjacent to the flat surface of the light guiding member, that is, the eyeball side surface of the spectacle lens, as a curved surface shape, the curved surface shape having a negative power capable of displaying a virtual image at a prescribed distance away from the wearer; Step 2, setting the shape of the surface of the first lens element opposite to the surface adjacent to the flat surface of the light guiding member, that is, the object side surface of the spectacle lens, as a curved surface shape, the curved surface shape having a positive power with an absolute value equal to that of the negative power; Step 3, re-setting the shape of the surface of the second lens element opposite to the surface adjacent to the flat surface of the light guiding member by adding the negative power and one of the spherical powers as a prescription value."

[0193] (Relative to the case where no electrochromic laminate is provided on the spectacle lens, Mode Group 3)

[0194] "A method of manufacturing (or designing) a pair of glasses, the pair of glasses comprising a spectacle lens and a frame, the spectacle lens having an object side surface and an eyeball side surface, and comprising a light guiding member; a first light emitting element adjacent to the light guiding member on the object side; a second lens element adjacent to the light guiding member on the eyeball side; the light guiding member being a flat plate shape having two flat surfaces, the first lens element comprising a positive lens, and the surface of the positive lens adjacent to the flat surface of the light guiding member being flat, the second lens element comprising a negative lens, and the surface of the negative lens adjacent to the flat surface of the light guiding member being flat, wherein the method of manufacturing (or designing) the pair of glasses has: Step 1, setting the shape of the surface of the second lens element opposite to the surface adjacent to the flat surface of the light guiding member, that is, the eyeball side surface of the spectacle lens, as a curved surface shape, the curved surface shape having a negative power capable of displaying a virtual image at a prescribed distance away from the wearer; Step 2, setting the shape of the surface of the first lens element opposite to the surface adjacent to the flat surface of the light guiding member, that is, the object side surface of the spectacle lens, as a curved surface shape, the curved surface shape having a positive power with an absolute value equal to that of the negative power, and at least one of the first lens element and the second lens element being detachable and attachable."

[0195] (In the case where an electrochromic laminate is provided with respect to an eyeglass lens)

[0196] In the case of providing an electrochromic laminate, the following processes are further included for each of the above manufacturing methods (or design methods).

[0197] "Process Four: An electrochromic laminate is provided on at least one of the first lens element and the second lens element"

[0198] Explanation of Reference Numerals

[0199] 1: Eyeglass lens

[0200] 2: Light guide member

[0201] 21: Side (edge)

[0202] 3: First lens element

[0203] 31: Object-side surface of the first lens element

[0204] 32: Eyeball-side surface of the first lens element

[0205] 4: Second lens element

[0206] 41: Object-side surface of the second lens element

[0207] 42: Eyeball-side surface of the second lens element

[0208] 5: Electrochromic laminate

[0209] 6: Hard coat and / or antireflection layer

[0210] 7: Plastic or glass non-variable-focus lens

[0211] E: Eye

[0212] V: Light beam of virtual image (from the image light exit portion)

[0213] R: Light beam of real image (from the outside world)

[0214] O: Pupil center and lens center

Claims

1. A spectacle lens, characterized in that, having a surface on the object side and a surface on the eyeball side, and comprising: a light guide member; a first lens element adjacent to the light guide member on the object side; a second lens element adjacent to the light guide member on the eyeball side; when a real image is obtained by imaging a light beam passing through 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 obtained by imaging a light beam transmitted in the light guide member and passing through the second lens element is displayed at a prescribed distance away from the wearer, at least one of the first lens element and the second lens element includes an electrochromic laminate.

2. The spectacle lens according to claim 1, wherein the electrochromic laminate satisfies at least one of the following: (1) The electrochromic laminate is disposed on the outermost surface side on the object side of the first lens element; (2) The electrochromic laminate is disposed on the outermost surface side on the eyeball side of the second lens element.

3. The spectacle lens according to claim 1, wherein the electrochromic laminate is spherical and curved.

4. The spectacle lens according to claim 1, wherein the light guide member is plate-shaped with two flat surfaces, the first lens element is a positive lens with a positive power that is the reciprocal of a prescribed distance, and the surface of the positive lens adjacent to the flat surface of the light guide member is flat, the second lens element is a negative lens with a negative power that is the reciprocal of the prescribed distance, and the surface of the negative lens adjacent to the flat surface of the light guide member is flat, the absolute values of the positive power and the negative power are the same, the first lens element includes the electrochromic laminate, and the electrochromic laminate includes a support and an electrochromic thin film laminated on the surface of the support, the electrochromic thin film includes: a first substrate and a second substrate; an electrochromic layer sandwiched between the first substrate and the second substrate, the materials of the first substrate and the second substrate are polycarbonate, the material of the first lens element is polycarbonate.

5. The spectacle lens according to claim 1, wherein the light guide member is plate-shaped with two flat surfaces, the first lens element includes a positive lens with a positive power that is the reciprocal of a prescribed distance, and the surface of the positive lens adjacent to the flat surface of the light guide member is flat, the second lens element includes a single functional composite lens, the spherical power of the functional composite lens is a value obtained by adding the negative power that is the reciprocal of the prescribed distance and the spherical power of the prescription value, and the surface of the functional composite lens adjacent to the flat surface of the light guide member is flat, the absolute values of the positive power and the negative power are the same, the first lens element includes the electrochromic laminate.

6. A spectacle lens, characterized in that, When obtaining a real image by imaging a light beam of external light passing through a lens element, the prescription value of the wearer is achieved using the lens element, and a virtual image obtained by imaging a light beam that is not external light is displayed at a predetermined distance from the wearer. The lens element includes an electrochromic laminate.

7. A pair of glasses, characterized in that, A spectacle lens and a spectacle frame according to any one of claims 1 to 6 are provided.

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