Method for manufacturing spectacle lens, semi-finished lens, spectacle lens, and spectacles

Abstract

The present invention provides: a method for manufacturing a spectacle lens (1) in which a holographic layer (21) within the spectacle lens (1) is irradiated with a laser beam reflected by a MEMS (micro electro mechanical system) mirror and a virtual image is recognized by the wearer of the spectacle lens (1), said spectacle lens (1) satisfying the prescription of the wearer, and a technique relating to the method for manufacturing a spectacle lens (1) in which a holographic layer (21) within the spectacle lens (1) is irradiated with a laser beam reflected by a MEMS (micro electro mechanical system) mirror; in a semi-finished lens in which one surface (H1) of a plate-shaped hologram portion (2) including a hologram layer (21) and one surface (B2) of two surfaces of a first lens blank are adjacent to each other, the other surface (B1) of the first lens blank is processed according to a prescription, and the object-side surface (S1) of the spectacle lens is set as the object-side surface (S2) of the spectacle lens. A spectacle lens (1) satisfying the prescription is obtained.

Description

Technical Field

[0001] The present invention relates to a method for manufacturing a spectacle lens, a semi-finished spectacle lens, a spectacle lens, and a pair of glasses. In particular, the present invention relates to a method for manufacturing a spectacle lens that meets a wearer's prescription and that allows the wearer to perceive a virtual image by irradiating a holographic layer within the spectacle lens with laser light reflected by a MEMS (micro-electromechanical system) mirror. Background Art

[0002] Patent Document 1 describes a glasses-type image display device. This device displays images on the lens surfaces of glasses so that a user wearing the glasses (referred to as "wearer" in this specification) can recognize the images.

[0003] The device includes an image output unit. The image output unit includes a light output unit. The document describes a structure in which the light output unit is composed, for example, of a MEMS (Micro Electro Mechanical Systems) scanning display including a light source and a display. The light emitted from the light source is reflected by the display and output as image light containing image information.

[0004] Furthermore, in this device, the lens comprises a lens substrate and a reflective hologram as an optical element disposed on a surface of the lens substrate. In this case, one of the two surfaces of the reflective hologram constitutes the surface of the spectacle lens facing away from the wearer, i.e., the object-side surface (the upper surface in FIG. 3 of Patent Document 1). In other words, the patent document describes the object-side surface of the spectacle lens as one surface of the reflective hologram.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent Application Laid-Open No. 2022-101004 Summary of the Invention

[0008] Technical problem to be solved by the invention

[0009] For those who prepare the lens substrate described in Patent Document 1, it is also possible to use the lens blank to manufacture a lens that meets the prescription of the above-mentioned eyeglass lens (spherical power S, astigmatism power C, astigmatism axis Ax, addition power ADD in the case of progressive refractive power lenses, and prismatic power Δ depending on the situation) after receiving an order for the above-mentioned eyeglass lens. On the other hand, in this method of manufacturing after receiving an order, it takes a lot of time to manufacture the lens. In particular, the demand for eyeglass lenses that can realize virtual images has been increasing in recent years, and the time it takes for eyeglass lenses and even glasses to reach the hands of eyeglass lens buyers has become very long (Technical Problem (1)).

[0010] As a method for solving the technical problem (1), there is provided a method of preparing a semi-finished lens in which the reflective hologram and the lens substrate described in Patent Document 1 are bonded in advance.

[0011] Ordinary semi-finished lenses are used to obtain eyeglass lenses that meet the prescription by pre-processing one of the two surfaces of the lens blank into a specified shape while processing the other surface (cutting, grinding, etc.).

[0012] The term "surface" as used in this specification refers to two surfaces that face each other in the direction of vision (the optical axis, the thickness direction of the spectacle lens, and the z-direction described below) when the wearer is wearing the spectacle lenses. Unless otherwise specified, the term "surface" does not refer to side surfaces (edge surfaces). This applies to the semi-finished lenses, lens blanks, holograms, and the resulting spectacle lenses and glasses described below.

[0013] In conventional semi-finished lenses, the surface facing the object side when used as spectacle lenses is pre-shaped to a predetermined shape, while the surface facing the eyeball side is processed. This is because the eyeball-side surface of spectacle lenses typically manufactured in a meniscus shape is concave, making it more advantageous for machining such as cutting and polishing than a convex shape.

[0014] As a method for solving the technical problem (1), the present inventors have obtained the following insight: when preparing a semi-finished lens in which the reflective hologram and the lens substrate described in Patent Document 1 are pre-bonded, as described in FIG3 of Patent Document 1, if the reflective hologram is arranged on the object side and the lens substrate is arranged on the eyeball side, the following aspects need to be studied.

[0015] The MEMS scanning display disclosed in Patent Document 1 functions by reflecting laser light from a MEMS mirror, which then reflects the laser light from a holographic layer on the eyeglass lens. This laser light is then incident on the wearer's pupil and output as image light containing image information. This mechanism is also referred to simply as "MEMS."

[0016] Compared to the reflective hologram in Patent Document 1, the lens substrate is located on the wearer's side. As a result, the refractive power of the laser beam fluctuates at multiple locations: the interface between the reflective hologram and the lens substrate, and the interface between the lens substrate and the outside world. On the other hand, if the shapes of these multiple locations remain constant depending on the wearer, the effects of these refractive power fluctuations can be eliminated or significantly reduced by modifying the reflective hologram's form (e.g., by modifying the shapes of both surfaces of the reflective hologram, adjusting the MEMS mirror, and / or adjusting the laser beam). This "fixing" of the shapes of these multiple locations to be constant depending on the wearer is also referred to as "surface fixation."

[0017] However, as mentioned above, in conventional semi-finished lenses, the surface facing the object side when used as a spectacle lens is pre-shaped, and the surface facing the eyeball side when used as a spectacle lens is processed. That is, the refractive power of one of the multiple locations, the surface facing the eyeball side of the semi-finished lens, varies depending on the wearer's prescription. In other words, under conventional thinking, the surface facing the eyeball side of the semi-finished lens is not fixed. If no processing is performed, the wearer may not be able to see a clear virtual image (Technical Problem (2)).

[0018] Figure 1 This represents an outline of the technical problem (2).

[0019] Figure 1 This is a schematic top-down cross-sectional view showing how a spectacle lens functions as part of a virtual image display system when the eyeball-side surface of a semi-finished lens is processed according to the wearer's prescription. The lower left figure shows the reflection of laser light when the spectacle lens is embedded in glasses.

[0020] It should be noted that in Figure 1 In the example, for the sake of convenience, the structure in which the hologram portion is sandwiched between lenses from the object side and the eyeball side is different from the content described in Patent Document 1. Figure 1 It is only a reference example and is not a well-known example. It should be noted that in the reference numerals of the reference example, 0 (zero) is added to the reference numerals of each component of an embodiment of the present invention.

[0021] For ease of explanation, in this specification, reference numerals are assigned to two surfaces of each component constituting a spectacle lens or a semi-finished lens, and reference numerals are omitted for other components. A description of the reference numerals is provided at the end of this specification.

[0022] As with the case where the surface F20 is fixed, the aforementioned treatment can involve modifying the form of the reflective hologram (referred to herein as the hologram portion) by adding variations in the refractive power of the multiple locations. However, modifying the form of the reflective hologram requires not only remaking the reflective hologram from scratch but also reassembling the remade reflective hologram with the lens substrate to reconfirm that the wearer can perceive a clear virtual image. Furthermore, the shape of the eyeball-side surface F20 of the semi-finished lens varies depending on the wearer. In other words, the variation in refractive power in this surface F20 varies depending on the wearer's prescription. Consequently, this reconfirmation must be performed for each wearer. This significantly increases the time it takes for the spectacle lenses, and ultimately the glasses themselves, to reach the purchaser.

[0023] Assuming that a semi-finished lens described in Patent Document 1 is prepared in which the reflective hologram is arranged on the object side and the lens substrate is arranged on the eyeball side, there is an advantage that the reflective hologram will not be damaged even if the lens substrate on the eyeball side is processed. On the other hand, when using this semi-finished lens, as shown in the above-mentioned technical problem (2), it is necessary to consider the changes in the refractive power at the above-mentioned multiple locations. In other words, when using a semi-finished lens, it is necessary to take into account both the avoidance of damage to the reflective hologram during the processing of the semi-finished lens and the solution of the above-mentioned technical problem (2) (technical problem (3)).

[0024] One embodiment of the method for manufacturing eyeglass lenses of the present invention aims to solve the above-mentioned technical problems (1) to (3).

[0025] One embodiment of the semi-finished lens of the present invention aims to solve the above-mentioned technical problem (1). Preferably, this embodiment aims to solve the above-mentioned technical problems (1) to (3).

[0026] One embodiment of the eyeglass lens or eyeglasses of the present invention aims to solve the above-mentioned technical problem (2).

[0027] Technical solutions to technical problems

[0028] Regarding one embodiment of the present invention's method for manufacturing spectacle lenses, the inventors have discovered the following. Specifically, they discovered that, contrary to the structure described in Patent Document 1, the lens blank is positioned on the object side, while the hologram portion is positioned on the eyeball side. Furthermore, they discovered that the prescription is achieved by processing the object-side surface of the lens blank.

[0029] More specifically, in one embodiment of the method for manufacturing eyeglass lenses of the present invention, the shapes of the two surfaces of the holographic portion are considered as a basis. The eyeball-side surface of the lens blank is pre-processed so that it is adjacent to the shape of one surface of the holographic portion (for example, joined as a surface). The following insight is obtained: the object-side surface of the lens blank can be processed into a free shape, and the object-side surface is processed in a manner that meets the prescription of the eyeglass lens received by the order. In other words, the following insight is obtained: the eyeball-side surface of the semi-finished lens is fixed. The insights described in the previous paragraph and this paragraph are referred to as insight (1).

[0030] Figure 2 This is a summary of the above-mentioned view (1).

[0031] Figure 2 This is a schematic top-down cross-sectional view showing how a spectacle lens functions as part of a virtual image display system when the eyeball-side surface of a semi-finished lens is processed according to the wearer's prescription. The lower left figure shows the reflection of laser light when the spectacle lens is embedded in glasses.

[0032] It should be noted that Figure 2 This is an example corresponding to the embodiment 1 described later. Figure 2 In the example, the case where a portion of the center (optical center, geometric center and / or centering center) of the lens is exposed in the holographic layer is exemplified.

[0033] Based on the above findings (1), the following aspects of the method for manufacturing a spectacle lens in the present invention were conceived.

[0034] A first aspect of the present invention provides a method for manufacturing a spectacle lens that satisfies a wearer's prescription, wherein the spectacle lens irradiates a holographic layer within the spectacle lens with laser light reflected by a MEMS (micro-electromechanical system) mirror, thereby allowing the wearer of the spectacle lens to recognize a virtual image. The method includes:

[0035] The invention has the following manufacturing steps: in accordance with the prescription, a semi-finished lens is formed by making one surface H1 of a plate-shaped holographic portion including the holographic layer adjacent to one surface B2 of the two surfaces of a first lens blank, and processing the other surface B1 of the first lens blank to set it as the object-side surface S1 of the eyeglass lens, thereby obtaining an eyeglass lens that meets the prescription.

[0036] A second aspect of the present invention is a method for manufacturing a spectacle lens according to the first aspect, wherein:

[0037] The surface S2 on the eyeball side of the spectacle lens is the other surface H2 of the hologram portion.

[0038] A third aspect of the present invention is a method for manufacturing a spectacle lens according to the first aspect, wherein:

[0039] The hologram portion has a shape that follows the shape of the hologram layer.

[0040] A fourth aspect of the present invention is a method for manufacturing a spectacle lens according to the first aspect, wherein:

[0041] The hologram portion is composed of the hologram layer bonded to a layered base portion.

[0042] A fifth aspect of the present invention is a method for manufacturing a spectacle lens according to the first aspect, wherein:

[0043] A distance d2 from the eyeball-side surface S2 of the spectacle lens to the hologram layer in the lens thickness direction is made smaller than a distance d1 from the object-side surface S1 of the spectacle lens to the hologram layer in the lens thickness direction.

[0044] A sixth aspect of the present invention is a method for manufacturing a spectacle lens according to the fifth aspect, wherein:

[0045] The value of d2 / d1 is 0.2 or less.

[0046] A seventh aspect of the present invention is a method for manufacturing a spectacle lens according to the first aspect, wherein:

[0047] The hologram portion is in the shape of a cylinder curved in the horizontal direction.

[0048] The surface H2 of the holographic portion is adjacent to one of the two surfaces B'1 of the second lens blank,

[0049] The other surface B'2 of the second lens blank is concave and spherical,

[0050] In the manufacturing process, the surface B1 of the first lens blank is formed into a convex or flat shape.

[0051] Regarding one embodiment of the semi-finished lens of the present invention, in order to solve the technical problem (1), the following finding was obtained: a semi-finished lens is prepared, the semi-finished lens comprising a first lens blank and a plate-shaped holographic portion including a holographic layer, wherein one surface B2 of the two surfaces of the first lens blank is adjacent to one surface H1 of the holographic portion (finding (2)). In other words, the following finding was obtained: a semi-finished lens pre-equipped with a holographic portion is prepared. In addition to this finding (1), the above finding was also obtained.

[0052] Based on the above findings (1) and (2), the following aspects of the semi-finished lens of the present invention were conceived.

[0053] An eighth aspect of the present invention provides a semi-finished lens for manufacturing a spectacle lens that meets a wearer's prescription, wherein the spectacle lens irradiates a holographic layer within the spectacle lens with laser light reflected by a MEMS (micro-electromechanical system) mirror, thereby allowing the wearer of the spectacle lens to recognize a virtual image, the semi-finished lens comprising:

[0054] a first lens blank; and

[0055] a plate-shaped holographic portion comprising the holographic layer,

[0056] One of the two surfaces of the first lens blank, B2, is adjacent to one surface H1 of the hologram portion.

[0057] One of the two surfaces of the semi-finished lens, F1, is the other surface B1 of the first lens blank.

[0058] The other surface F2 of the semi-finished lens is the other surface H2 of the holographic portion.

[0059] A ninth aspect of the present invention provides a semi-finished lens for manufacturing a spectacle lens that meets a wearer's prescription, wherein the spectacle lens allows the wearer to recognize a virtual image by irradiating a holographic layer within the spectacle lens with laser light reflected by a MEMS (micro-electromechanical system) mirror, and wherein the semi-finished lens comprises:

[0060] a first lens blank;

[0061] a second lens blank; and

[0062] a plate-shaped holographic portion comprising the holographic layer,

[0063] The hologram portion is in the shape of a cylinder curved in the horizontal direction.

[0064] One of the two surfaces of the first lens blank, B2, is adjacent to one surface H1 of the hologram portion.

[0065] The surface H2 of the holographic portion is adjacent to one of the two surfaces B'1 of the second lens blank,

[0066] The other surface B'2 of the second lens blank is concave and spherical,

[0067] One of the two surfaces of the semi-finished lens, F1, is the other surface B1 of the first lens blank.

[0068] The other face F2 of the semi-finished lens is the face B′2 of the second lens blank.

[0069] A tenth aspect of the present invention is the semi-finished lens according to the eighth or ninth aspect, wherein:

[0070] The hologram portion has a shape that follows the shape of the hologram layer.

[0071] The eleventh aspect of the present invention is the semi-finished lens according to the eighth or ninth aspect, wherein:

[0072] The hologram portion is composed of the hologram layer bonded to a layered base portion.

[0073] A twelfth aspect of the present invention is the semi-finished lens according to the eighth or ninth aspect, wherein:

[0074] A distance t2 from the surface F2 of the semi-finished lens to the hologram layer in the lens thickness direction is made smaller than a distance t1 from the surface F1 of the semi-finished lens to the hologram layer in the lens thickness direction.

[0075] A thirteenth aspect of the present invention is the semi-finished lens according to the twelfth aspect, wherein:

[0076] The value of t2 / t1 is 0.2 or less.

[0077] Regarding one embodiment of the spectacle lens or eyeglasses according to the present invention, the present inventors have discovered the following. Specifically, the present inventors have discovered that when a first lens, formed by processing a first lens blank according to a prescription (specifically, such that the prescription is satisfied by the first lens blank alone), is positioned on the object side, and a plate-shaped holographic portion including a holographic layer is positioned on the eyeball side, while no lens is positioned on the eyeball side as viewed from the holographic portion (also referred to herein as "no lens"), or when a second lens is positioned, the shape is simple, such as "a horizontally curved cylindrical holographic portion and a concave, spherical surface on the eyeball side of the second lens" (details will be described in detail in the embodiments, also referred to herein as "simple fixed lens"), a clear virtual image is obtained because the image is not formed on the retina, as in MEMS.

[0078] In other words, when a lensless lens or a simple fixed lens is used to allow the wearer to recognize a virtual image of a type that forms an image on the retina, the eyeball side of the lens blank is not processed according to the wearer's needs. Thus, it is not possible to allow the wearer to recognize a virtual image while satisfying the prescription. On the other hand, in the spectacle lenses or glasses of the present invention, in order to allow the wearer to recognize a virtual image of a type that does not form an image on the retina, such as MEMS, the above-mentioned contents can be ignored. The following aspects of the spectacle lenses or glasses of the present invention are effective because they are virtual images of a type that does not form an image on the retina, such as MEMS. The insights described in the previous paragraph and this paragraph are referred to as insights (3).

[0079] Based on the above-mentioned knowledge (3), the following aspects of the spectacle lenses or spectacles of the present invention were conceived.

[0080] A fourteenth aspect of the present invention provides a spectacle lens that meets a wearer's prescription, wherein the spectacle lens irradiates a holographic layer within the spectacle lens with laser light reflected by a MEMS (micro-electromechanical system) mirror, thereby allowing the wearer to recognize a virtual image. The spectacle lens comprises:

[0081] a first lens; and

[0082] a plate-shaped holographic portion comprising the holographic layer,

[0083] One of the two surfaces of the first lens, L2, is adjacent to one surface H1 of the holographic portion.

[0084] The object-side surface S1 of the spectacle lens is another surface L1 of the first lens.

[0085] The surface S2 on the eyeball side of the spectacle lens is the other surface H2 of the hologram portion.

[0086] A fifteenth aspect of the present invention provides a spectacle lens that meets a wearer's prescription, wherein the spectacle lens irradiates a holographic layer within the spectacle lens with laser light reflected by a MEMS (micro-electromechanical system) mirror, thereby allowing the wearer to recognize a virtual image, the spectacle lens comprising:

[0087] First lens;

[0088] a second lens; and

[0089] a plate-shaped holographic portion comprising the holographic layer,

[0090] The hologram portion is in the shape of a cylinder curved in the horizontal direction.

[0091] One of the two surfaces of the first lens, L2, is adjacent to one surface H1 of the holographic portion.

[0092] The surface H2 of the holographic portion is adjacent to one of the two surfaces L'1 of the second lens,

[0093] The other surface L'2 of the second lens is concave and spherical.

[0094] The surface L1 of the first lens is convex or flat.

[0095] The object-side surface S1 of the spectacle lens is the surface L1 of the first lens.

[0096] The surface S2 of the spectacle lens on the eyeball side is the surface L′2 of the second lens.

[0097] A sixteenth aspect of the present invention is the eyeglass lens according to the fourteenth or fifteenth aspect, wherein:

[0098] The hologram portion has a shape that follows the shape of the hologram layer.

[0099] A seventeenth aspect of the present invention is the eyeglass lens according to the fourteenth or fifteenth aspect, wherein:

[0100] The hologram portion is composed of the hologram layer bonded to a layered base portion.

[0101] An eighteenth aspect of the present invention is the eyeglass lens according to the fourteenth or fifteenth aspect, wherein:

[0102] A distance d2 from the eyeball-side surface S2 of the spectacle lens to the hologram layer in the lens thickness direction is smaller than a distance d1 from the object-side surface S1 of the spectacle lens to the hologram layer in the lens thickness direction.

[0103] A nineteenth aspect of the present invention is the eyeglass lens according to the eighteenth aspect, wherein:

[0104] The value of d2 / d1 is 0.2 or less.

[0105] A twentieth aspect of the present invention provides a pair of glasses comprising:

[0106] The spectacle lens according to the fourteenth or fifteenth aspect; and

[0107] Glasses frames.

[0108] Other preferred embodiments are as follows: The following embodiments can be combined with the embodiments described above.

[0109] The thickness of the plate-shaped hologram is not limited. For example, the upper limit of the thickness of the hologram is 2.0 mm, 1.5 mm, or 1.0 mm, and the lower limit of the thickness of the hologram is 0.005 mm, 0.01 mm, 0.05 mm, or 0.10 mm.

[0110] The thickness of the hologram layer is not limited. For example, the upper limit of the thickness of the hologram layer is 20 μm, 15 μm, or 10 μm, and the lower limit of the thickness of the hologram layer is 0.1 μm, 0.5 μm, or 1 μm.

[0111] The thickness of the base portion is not limited. For example, the upper limit of the thickness of the base portion can be 2.0 mm, 1.5 mm, or 1.0 mm. The lower limit of the thickness of the base portion can be 0.01 mm, 0.05 mm, or 0.10 mm.

[0112] As used herein, "adjacent" includes physical contact with the hologram (e.g., surface bonding, as exemplified below), as well as non-contact but close proximity (e.g., separation distance at the geometric center of the lens is a maximum of 8 mm, 5 mm, or 3 mm). An example of this non-contact close proximity is when another film is interposed between the hologram and the first lens.

[0113] Effects of the Invention

[0114] An embodiment of the method for manufacturing eyeglass lenses of the present invention can solve the above-mentioned technical problems (1) to (3).

[0115] An embodiment of the semi-finished lens of the present invention can solve the technical problem (1). Preferably, the embodiment can solve the technical problems (1) to (3).

[0116] An embodiment of the spectacle lenses or spectacles of the present invention can solve the technical problem (2). BRIEF DESCRIPTION OF THE DRAWINGS

[0117] Figure 1This is a schematic top-down cross-sectional view showing how a spectacle lens functions as part of a virtual image display system when the eyeball-side surface of a semi-finished lens is processed according to the wearer's prescription. The lower left figure shows the reflection of laser light when the spectacle lens is embedded in glasses.

[0118] Figure 2 This figure is related to one embodiment of the present invention and is a schematic top-view cross-sectional view showing how a spectacle lens functions as part of a virtual image display system when the object-side surface of a semi-finished lens is processed according to the wearer's prescription. The lower left figure shows the reflection of laser light when the spectacle lens is embedded in glasses. DETAILED DESCRIPTION

[0119] 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.

[0120] In the first embodiment, the lens-less type described above will be described.

[0121] In the second embodiment, the above-mentioned simple fixing lens type method will be described.

[0122] Before these descriptions, the common contents of Implementation Modes 1 and 2 will be described.

[0123] [Common Content]

[0124] One embodiment of the present invention relates to a system that allows a wearer to experience virtual reality and / or augmented reality and that can be mounted on a user's head, glasses, and lens elements.

[0125] A system according to one embodiment of the present invention includes an image light emitting unit for causing image light from a MEMS to enter the wearer's pupil, and the following eyeglass lenses. The image light emitting unit is at least a portion of the MEMS structure, comprising the structure required to emit image light and cause it to enter the wearer's pupil. The image light beam is incident on the wearer's pupil, allowing the wearer to perceive a virtual image. The virtual image is not limited and can be either an animated or a still image.

[0126] The system can be a head-mounted display or smart glasses. Hereinafter, the case where the system is smart glasses will be exemplified. One embodiment of the present invention is also a spectacle lens in the smart glasses.

[0127] The term "spectacles lens" in this specification refers to a lens that reflects laser light from a MEMS (micro-electromechanical system) mirror and illuminates a holographic layer within the lens, allowing the wearer to perceive a virtual image. Furthermore, the term "spectacles lens" in this specification refers to a lens that meets the wearer's prescription.

[0128] It should be noted that, in one embodiment of the present invention, the first lens and the second lens may be made of plastic or glass made solely from lens blanks. That is, in one embodiment of the present invention, the first lens and the second lens are non-variable focus lenses.

[0129] The principle of reflecting a virtual image onto the spectacle lens using MEMS can be appropriately adapted from known techniques (e.g., those described in Patent Document 1). For example, the MEMS-related descriptions in Patent Document 1 (such as the specific structure of the light source and MEMS mirror, and the system's drive control unit) can also be adapted from known techniques, and therefore, a detailed description thereof will be omitted in this specification.

[0130] In this specification, the term "hologram" is not limited to any material as long as it is a plate-shaped material including a hologram layer. As an example, the hologram may be shaped along the hologram layer. Alternatively, the hologram may be composed of the hologram layer bonded to a layered base.

[0131] exist Figure 2 In this example, a portion of the holographic layer at the lens center (optical center, geometric center, and / or centering center) is exposed. Light reflected from the MEMS mirror is further reflected by the exposed portion, entering the wearer's eye, allowing the wearer to perceive a virtual image. However, the present invention is not limited to this embodiment. The entire holographic layer can also be exposed. In either case, the eyeglass lens of one embodiment of the present invention exhibits a see-through function. For example, the holographic portion is sufficiently transparent for practical purposes when viewed in person.

[0132] The "plate-like shape" of the hologram portion is not limited; it can be either a flat plate or a curved plate. Even in a curved plate, the two surfaces H1 and H2 can be spherical or aspherical. The two surfaces H1 and H2 can have different shapes or can mimic each other (e.g., the same shape). In Embodiment 2, the shape of the hologram portion is limited to a horizontally curved cylindrical shape (e.g., a flat plate curved only in the horizontal direction).

[0133] The thickness of the plate-shaped hologram is not limited. For example, the upper limit of the thickness of the hologram is 2.0 mm, 1.5 mm, or 1.0 mm, and the lower limit of the thickness of the hologram is 0.005 mm, 0.01 mm, 0.05 mm, or 0.10 mm.

[0134] The thickness of the hologram layer is not limited. For example, the upper limit of the thickness of the hologram layer is 20 μm, 15 μm, or 10 μm, and the lower limit of the thickness of the hologram layer is 0.1 μm, 0.5 μm, or 1 μm.

[0135] The thickness of the base portion is not limited. For example, the upper limit of the thickness of the base portion can be 2.0 mm, 1.5 mm, or 1.0 mm. The lower limit of the thickness of the base portion can be 0.01 mm, 0.05 mm, or 0.10 mm.

[0136] The following examples illustrate the hologram described in the preceding paragraphs, but the present invention is not limited to this embodiment. For example, the hologram layer, a flat film, can be embedded within a base portion that bends the flat plate only horizontally, as in Embodiment 2. Alternatively, another component can be sandwiched between the base portion and the hologram layer. Furthermore, the base portion can be a light guide component or a film that simply supports or reinforces the hologram. This "light guide component" can be used in technologies that project virtual images onto the wearer through eyeglass lenses, so a detailed description will be omitted in this specification.

[0137] The raw material of the base portion may be the same as or different from that of the first lens (or even the first lens blank). The raw material of the base portion is not limited. Similarly, the raw material of the base portion may be the same as or different from that of the second lens (or even the second lens blank) in Embodiment 2 described later. Furthermore, the raw material of the first lens (or even the first lens blank) may be the same as or different from that of the second lens (or even the second lens blank) in Embodiment 2 described later. Examples of raw materials for each component include triacetyl cellulose (TAC) and polycarbonate (PC).

[0138] The plate-shaped hologram is originally a separate structure from the first lens blank. The object-side surface H1 of the hologram is adjacent to the eyeball-side surface B2 of the first lens blank. Specifically, the two are joined together as a surface. This joining is a characteristic of the semi-finished lens manufacturing method.

[0139] The method of "joining" in this specification is not limited and includes joining with an adhesive and joining by heat welding. In addition, although this is related to the second embodiment, the plate-shaped hologram portion is originally a separate structure from the second lens blank.

[0140] An eyeglass lens according to one embodiment of the present invention has a see-through function and includes an object-side surface S1 and an eyeball-side surface S2. The object-side surface S1 and the eyeball-side surface face each other, and the portion of the surface facing each other in the optical axis direction when viewed from the object-side surface S1 is the eyeball-side surface S2.

[0141] The y-direction referred to in this manual is the direction along the meridian and is vertical. The upper side of the lens when worn is designated as the +y-direction, and the lower side of the lens is designated as the -y-direction. The x-direction is the direction perpendicular to the meridian and is horizontal. When viewed from the wearer's perspective, the right side of the lens is designated as the +x-direction, and the left side of the lens is designated as the -x-direction. The z-direction, perpendicular to the x- and y-directions, i.e., the direction of the lens thickness (optical axis), is designated as the +z-direction, with the object side designated as the +z-direction and the eye side designated as the -z-direction.

[0142] The "spectacles lens" referred to in this specification comprises at least a first lens and a hologram. The first lens is adjacent to the hologram on the object side (+z direction). The first lens has two surfaces, L1 and L2. The object-side surface L1 of the first lens serves as the object-side surface S1 of the spectacle lens. The eyeball-side surface L2 of the first lens (-z direction) is adjacent to the object-side surface H1 of the hologram.

[0143] The first lens is obtained by processing a first lens blank, part of a semi-finished lens, according to the prescription. Like the first lens, the first lens blank also has two surfaces, B1 and B2. The object-side surface B1 of the first lens blank is processed according to the prescription to become the object-side surface L1 of the first lens, which in turn becomes the object-side surface S1 of the spectacle lens. The eyeball-side surface B2 of the first lens blank is adjacent to the object-side surface H1 of the hologram.

[0144] In the following, the first lens, the first lens blank serving as its base, and the two surfaces of each hologram are expressed according to the method described in this paragraph. In the case of embodiment 2, a second lens serving as a simple fixed lens and the second lens blank serving as its base are added to these.

[0145] It should be noted that the first lens is denoted by the reference symbol L, the first lens blank is denoted by the reference symbol B, the semi-finished lens is denoted by the reference symbol F, and the spectacle lens is denoted by the reference symbol S. Furthermore, the object side is denoted by the reference symbol 1, and the eyeball side is denoted by the reference symbol 2. For example, the object-side surface of the first lens is denoted by the reference symbol L1. It should be noted that in the second lens and the second lens blank of Embodiment 2, each reference symbol is denoted by ´.

[0146] The first lens and the second lens of embodiment 2 are both non-variable focus lenses made of plastic or glass. The first lens and the second lens of embodiment 2 may also include a hard coating, an anti-reflection layer, an anti-fouling layer, and the like.

[0147] There is no limit to the number of lenses that constitute the first lens. There is no limit to the number of lenses that constitute the second lens in Embodiment 2. However, increasing the number of lenses increases the thickness of the spectacle lens. Therefore, it is preferable that the first lens be a single lens (with the object-side surface L1 being a convex surface) and the second lens in Embodiment 2 be a single lens (with the eyeball-side surface L´2 being a concave surface).

[0148] As used herein, "adjacent" includes physical contact with the hologram (e.g., surface bonding, as exemplified below), as well as non-contact but close proximity (e.g., separation distance at the geometric center of the lens is a maximum of 8 mm, 5 mm, or 3 mm). An example of this non-contact close proximity is when another film is interposed between the hologram and the first lens.

[0149] One embodiment of the eyeglass lens of the present invention has a see-through function. Therefore, when a light beam passing through the first lens and the hologram forms an image to form a real image, the wearer's prescription is achieved by the first lens and the hologram. The wearer's prescription is achieved by the refractive index and surface shape of the materials used for the first lens and the hologram, respectively.

[0150] It should be noted that, in one embodiment of the method for manufacturing a spectacle lens according to the present invention, the shapes of the two surfaces H1 and H2 of the hologram (more specifically, the object of the hologram) are considered as a basis.

[0151] Therefore, in the first embodiment (no lens on the eyeball side of the hologram), assuming that the hologram already exists, the object-side surface B1 of the first lens blank bonded to the object side of the hologram is processed to satisfy the prescription.

[0152] In the second embodiment (a second lens in which the shape of the hologram is specified and the surface L'2 on the eyeball side is concave and spherical), the object-side surface B1 of the first lens blank bonded to the object side of the hologram is processed to meet the prescription, assuming that the hologram and the second lens are already firmly in place.

[0153] Furthermore, the wearer's prescription is recorded in the lens case of the spectacle lenses. This is also true when the spectacle lenses of one embodiment of the present invention include a light guide component. This is because the spectacle lenses of one embodiment of the present invention correct for refractive anomalies during external verification, necessitating the recording of the prescription. Consequently, the spectacle lenses of one embodiment of the present invention also come with a lens case.

[0154] The presence of a lens bag allows identification of the object as a spectacle lens based on the wearer's prescription. Furthermore, spectacle lenses typically come with a lens bag. Therefore, spectacle lenses with a lens bag also reflect the technical concept of the present invention, and the lens bag and spectacle lens are similarly matched.

[0155] Examples of a wearer's prescription include the spherical power (S) at emmetropia (infinity), the astigmatism (C), the axis of astigmatism (Ax), and the prism power (Δ). In the case of progressive-power lenses, this may also include the addition power (ADD). As used herein, "addition power" refers to the difference in power required to correct vision from the spherical power at emmetropia (infinity) to near vision (a positive value in this specification).

[0156] In the above example, the spectacle lens has a convex surface S1 on the object side and a concave surface S2 on the eyeball side. That is, the spectacle lens in the above example is a meniscus lens.

[0157] [Embodiment 1 (Lens-less)]

[0158] In embodiment 1, the above-mentioned lens-free type ( Figure 2 ) is described in this way.

[0159] Semi-finished lenses

[0160] A specific example of the structure of the semi-finished lens in Embodiment 1 is as follows: The present invention also has technical significance as a method for manufacturing the following semi-finished lens.

[0161] A semi-finished lens for manufacturing a spectacle lens that meets a wearer's prescription, wherein the spectacle lens allows the wearer of the spectacle lens to recognize a virtual image by irradiating a laser reflected by a MEMS (micro-electromechanical system) mirror onto a holographic layer within the spectacle lens, wherein the semi-finished lens comprises:

[0162] a first lens blank; and

[0163] a plate-shaped holographic portion comprising the above-mentioned holographic layer,

[0164] One of the two surfaces of the first lens blank, B2, is adjacent to one surface H1 of the hologram portion.

[0165] One of the two surfaces of the semi-finished lens, F1, is the other surface B1 of the first lens blank.

[0166] The other surface F2 of the semi-finished lens is the other surface H2 of the holographic portion.

[0167] In Embodiment 1, the surface B2 of the first lens blank is bonded to the surface H1 of the hologram. Furthermore, the surface F1 of the semi-finished lens is the surface B1 of the first lens blank, and the surface F2 of the semi-finished lens is the surface H2 of the hologram.

[0168] By adopting the first embodiment, unlike the method of manufacturing after receiving an order, the time required to manufacture lenses can be significantly shortened. As a result, the time it takes for the spectacle lenses, and even the glasses, to reach the hands of the purchaser of the spectacle lenses can be significantly shortened, and the above-mentioned technical problem (1) can be solved. This point is also the same in the second embodiment described later.

[0169] Moreover, in the first embodiment, the shape of the two surfaces H1 and H2 of the hologram portion is considered as the basis. The surface B2 on the eyeball side of the first lens blank is pre-processed in a manner that is joined to one surface H2 of the hologram portion. The surface B1 on the object side of the first lens blank can be processed into a free shape, and the surface B1 on the object side is processed to meet the prescription of the eyeglass lens received by the order. This means that the surface F1 on the object side of the semi-finished lens is freely processed so that the eyeglass lens meets the prescription. On the other hand, the surface F2 on the eyeball side of the semi-finished lens is fixed. As a result, the above-mentioned technical problem (2) can be solved. The fact that the surface F2 on the eyeball side of the semi-finished lens is fixed is also the same in the second embodiment described later.

[0170] It should be noted that when using a semi-finished lens, it is necessary to balance the need to avoid damage to the reflective holographic element during processing of the semi-finished lens and to resolve the aforementioned technical problem (2) (technical problem (3)). In the first embodiment, the eyeball-side surface F2 of the semi-finished lens is fixed, and only the object-side surface F1 needs to be processed. Therefore, technical problem (3) can be resolved. This point is also the same in the second embodiment described later.

[0171] The following provisions are made to express the structure of an object such as a semi-finished lens that can solve the technical problem (3): Specifically, the hologram layer is placed on the surface F2 on the eyeball side of the semi-finished lens.

[0172] It is preferable that the distance t2 from the surface F2 of the semi-finished lens to the holographic layer in the lens thickness direction is smaller than the distance t1 from the surface F1 of the semi-finished lens to the holographic layer in the lens thickness direction. As described in Technical Problem (2), in ordinary semi-finished lenses, the surface on the eyeball side is processed according to the prescription. The structure described in this paragraph is the opposite of the processing of such ordinary semi-finished lenses, that is, the surface F1 on the object side is processed according to the prescription. Therefore, the holographic layer is arranged at the position of the surface F2 on the eyeball side of the semi-finished lens. This content is stipulated in this paragraph.

[0173] The position of the hologram layer on the surface F2 on the eyeball side of the semi-finished lens can be quantitatively defined as follows.

[0174] The value of the above t2 / the above t1 is 0.2 or less (or 0.15 or less, or 0.13 or less).

[0175] <Method for manufacturing eyeglass lenses>

[0176] A specific example of the structure of the method for manufacturing a spectacle lens in the first embodiment is as follows.

[0177] A method for manufacturing a spectacle lens that satisfies a wearer's prescription, wherein the spectacle lens irradiates a holographic layer within the spectacle lens with laser light reflected by a MEMS (micro-electromechanical system) mirror, thereby allowing the wearer of the spectacle lens to recognize a virtual image, wherein:

[0178] The invention comprises the following manufacturing steps: in accordance with the above prescription, a semi-finished lens is formed by making one surface H1 of a plate-shaped holographic portion including the above holographic layer adjacent to one surface B2 of the two surfaces of the first lens blank, and processing the other surface B1 of the first lens blank to set it as the object-side surface S1 of the eyeglass lens, thereby obtaining an eyeglass lens that satisfies the above prescription.

[0179] In the first embodiment, surface B1 of the first lens blank is processed according to the prescription and becomes surface S1 on the object side of the spectacle lens. Although repeated, in one embodiment of the present invention, a plate-shaped hologram portion is used as the basis. In the first embodiment, surface H2 of the hologram portion becomes surface S2 on the eyeball side of the spectacle lens. Therefore, simply by pre-setting the hologram portion, surface B1 of the first lens blank is processed according to the prescription to be satisfied, thereby manufacturing a spectacle lens that satisfies the prescription. This processing is referred to as "processing according to the prescription." The specific operations of the spectacle lens manufacturing process can be carried out using well-known techniques, and therefore, a detailed description is omitted in this specification.

[0180] The following provisions are provided for the process details of a method for manufacturing spectacle lenses that can solve Technical Problem (3). The following contents are identical to those described in "Semi-finished Lenses," and therefore, detailed descriptions are omitted. The following provisions are also applicable to "Spectacle Lenses and Glasses," described later.

[0181] A distance d2 from the eyeball-side surface S2 of the spectacle lens to the hologram layer in the lens thickness direction is made smaller than a distance d1 from the object-side surface S1 of the spectacle lens to the hologram layer in the lens thickness direction.

[0182] The value of the above d2 / the above d1 is 0.2 or less.

[0183] <Spectacle lenses and glasses>

[0184] A specific example of the structure of the spectacle lens in the first embodiment is as follows.

[0185] A spectacle lens that meets a wearer's prescription, wherein the spectacle lens irradiates a holographic layer within the spectacle lens with laser light reflected by a MEMS (micro-electromechanical system) mirror, thereby allowing the wearer of the spectacle lens to recognize a virtual image, the spectacle lens comprising:

[0186] a first lens; and

[0187] a plate-shaped holographic portion comprising the above-mentioned holographic layer,

[0188] One of the two surfaces of the first lens, L2, is adjacent to one surface H1 of the holographic portion.

[0189] The object-side surface S1 of the eyeglass lens is the other surface L1 of the first lens.

[0190] The surface S2 on the eyeball side of the eyeglass lens is the other surface H2 of the hologram portion.

[0191] A specific example of the structure of the glasses in the first embodiment is as follows.

[0192] "A pair of glasses comprising:

[0193] The above-mentioned spectacle lenses; and

[0194] Eyeglass frames."

[0195] The spectacle lens and eyewear in Embodiment 1 are the result of a semi-finished lens having its eyeball-side surface F2 fixed. In Embodiment 1, the refractive power of the spectacle lens' eyeball-side surface S2, which is one of the multiple locations described in Patent Document 1, such as the interface between the reflective hologram and the lens substrate, and the interface between the lens substrate and the outside world, does not vary depending on the wearer's prescription. This is because, in the lensless embodiment of Embodiment 1, the eyeball-side surface S2 of the spectacle lens is formed by the surface H2 of the hologram portion, which serves as the basis.

[0196] As a result, with the spectacle lenses and glasses in embodiment 1, the wearer can recognize a clear virtual image, and technical problem (2) can be solved.

[0197] The object-side surface L1 of the first lens (i.e., the object-side surface S1 of the spectacle lens) can be a spherical surface or a toric surface for correcting astigmatism. The spectacle lens itself can also be a single-focus lens. Alternatively, the object-side surface S1 of the spectacle lens can be a progressive surface with a gradually changing diopter. It should be noted that the positions of the various hidden markings used in progressive-power lenses (measurement reference point F, fitting point or eye point FP, measurement reference point N) can be determined by referring to a remark chart or centering chart issued by the lens manufacturer.

[0198] [Embodiment 2 (Simple fixed lens)]

[0199] In the second embodiment, the above-mentioned simple lens fixing method is described. The contents described in the first embodiment can be used for any matters not described below. The hologram layer in the first embodiment can also refer to the regulations regarding the position of the eyeball-side surface F2 (or the eyeball-side surface S2 of the spectacle lens) of the semi-finished lens. However, in the second embodiment, the regulations are based on the distance from the surface B´2 of the second lens blank to the hologram layer, or the distance from the surface L´2 of the second lens to the hologram layer.

[0200] Semi-finished lenses

[0201] A specific example of the structure of the semi-finished lens in Embodiment 2 is as follows: The present invention also has technical significance as a method for manufacturing the following semi-finished lens.

[0202] A semi-finished lens for manufacturing a spectacle lens that meets a wearer's prescription, wherein the spectacle lens allows the wearer of the spectacle lens to recognize a virtual image by irradiating a laser reflected by a MEMS (micro-electromechanical system) mirror onto a holographic layer within the spectacle lens, wherein the semi-finished lens comprises:

[0203] a first lens blank;

[0204] a second lens blank; and

[0205] a plate-shaped holographic portion comprising the above-mentioned holographic layer,

[0206] The hologram is in the shape of a cylinder that is curved in the horizontal direction.

[0207] One of the two surfaces of the first lens blank, B2, is adjacent to one surface H1 of the hologram portion.

[0208] The surface H2 of the hologram is adjacent to one of the two surfaces B'1 of the second lens blank.

[0209] The other surface B'2 of the second lens blank is concave and spherical.

[0210] One of the two surfaces of the semi-finished lens, F1, is the other surface B1 of the first lens blank.

[0211] The other surface F2 of the semi-finished lens is the surface B´2 of the second lens blank.

[0212] In Embodiment 2, the surface B2 of the first lens blank is bonded to the surface H1 of the hologram. Furthermore, the surface F1 of the semi-finished lens is the surface B1 of the first lens blank, and the surface F2 of the semi-finished lens is the surface B'2 of the second lens blank.

[0213] In Embodiment 2, unlike in Embodiment 1, a second lens blank, distinct from the first lens blank, is adjacent to (e.g., bonded to) the eyeball-side surface H2 of the hologram. However, in Embodiment 2, the hologram is defined as a cylindrical shape that curves only in the horizontal direction. Furthermore, the eyeball-side surface B'2 of the second lens blank is defined as a simple, concave, spherical shape. The reasons for this are as follows.

[0214] To satisfy the prescription, let's assume a spectacle lens that is a negative lens. Furthermore, let's assume a hologram that is cylindrical, curved only in the horizontal direction. If the first embodiment described so far is applied to this situation, the first lens surface L1 (the object-side surface S1 of the spectacle lens) will be convex in the horizontal direction (x-direction) of the curvature. On the other hand, the hologram will be flat in the vertical direction (y-direction). In the first embodiment, only the first lens element is present. In other words, the negative lens must be realized solely from the first lens blank. Consequently, the first lens element must be concave in the vertical direction. Consequently, the object-side surface S1 of the spectacle lens must be deformed, convex in the horizontal direction but concave in the vertical direction.

[0215] Therefore, in Embodiment 2, a semi-finished lens is used in which a second lens blank is placed on the eyeball side of the holographic portion. The presence of a second lens blank allows for the realization of a negative lens using more than just the first lens blank. Furthermore, if the second lens blank's surface B'2 is concave and spherical, there is no need to forcibly create a vertical concavity in the first lens blank.

[0216] When preparing the semi-finished lens, the above technical problem (1) can be solved by the embodiment 2.

[0217] Regarding the above-mentioned technical problem (2), in the second embodiment, it is assumed that the shape of the hologram portion is a cylindrical shape that is curved only in the horizontal direction. In addition, it is assumed that the surface B'2 of the second lens blank is concave and spherical. Moreover, the surface B1 of the first lens blank is processed to meet the prescription of the eyeglass lens in the same manner as in the first embodiment. That is, in the second embodiment, the surface of the semi-finished lens on the eyeball side is also fixed. As a result, the above-mentioned technical problem (2) can be solved by the method of the second embodiment.

[0218] In addition, when using a semi-finished lens, it is necessary to consider both avoiding damage to the reflective holographic part during processing of the semi-finished lens and solving the above-mentioned technical problem (2) (technical problem (3)). In embodiment 2, the surface F2 on the eyeball side of the semi-finished lens is fixed, and it is sufficient to process the surface F1 on its object side. Therefore, technical problem (3) can be solved.

[0219] The technical concepts that “the surface F2 on the eyeball side of the semi-finished lens is fixed” and “the spectacle lens obtained from the semi-finished lens also has a structure reflecting this fixation” are common to the first and second embodiments.

[0220] <Method for manufacturing eyeglass lenses>

[0221] A specific example of the structure of the method for manufacturing a spectacle lens in the second embodiment is as follows.

[0222] A method for manufacturing a spectacle lens that satisfies a wearer's prescription, wherein the spectacle lens irradiates a holographic layer within the spectacle lens with laser light reflected by a MEMS (micro-electromechanical system) mirror, thereby allowing the wearer of the spectacle lens to recognize a virtual image, wherein:

[0223] The method comprises the following manufacturing steps: processing, according to the above prescription, one surface H1 of a plate-shaped holographic portion including the above holographic layer and one surface B2 of the two surfaces of the first lens blank, the other surface B1 of the first lens blank, and setting the other surface B1 as the object-side surface S1 of the eyeglass lens, thereby obtaining an eyeglass lens satisfying the above prescription;

[0224] The hologram is in the shape of a cylinder that is curved in the horizontal direction.

[0225] The surface H2 of the holographic portion is adjacent to one of the two surfaces B'1 of the second lens blank.

[0226] The other surface B'2 of the second lens blank is concave and spherical.

[0227] In the above manufacturing process, the surface B1 of the first lens blank is made into a convex or flat shape.

[0228] In the second embodiment, surface B1 of the first lens blank is processed according to the prescription and becomes surface S1 on the object side of the spectacle lens. Although repeated, in one embodiment of the present invention, a plate-shaped hologram is considered as the basis. Furthermore, in the second embodiment, a second lens blank is considered as the basis. Therefore, in the second embodiment, surface B'2 of the second lens blank becomes surface S2 on the eyeball side of the spectacle lens. Therefore, simply by adding the hologram form in advance and processing surface B1 of the first lens blank according to the prescription to be satisfied, a spectacle lens that satisfies the prescription can be manufactured.

[0229] <Spectacle lenses and glasses>

[0230] A specific example of the structure of the spectacle lens in the second embodiment is as follows.

[0231] A spectacle lens that meets a wearer's prescription, wherein the spectacle lens irradiates a holographic layer within the spectacle lens with laser light reflected by a MEMS (micro-electromechanical system) mirror, thereby allowing the wearer of the spectacle lens to recognize a virtual image, the spectacle lens comprising:

[0232] First lens;

[0233] a second lens; and

[0234] a plate-shaped holographic portion comprising the above-mentioned holographic layer,

[0235] The hologram is in the shape of a cylinder that is curved in the horizontal direction.

[0236] One of the two surfaces of the first lens, L2, is adjacent to one surface H1 of the holographic portion.

[0237] The surface H2 of the holographic portion is adjacent to one of the two surfaces L'1 of the second lens.

[0238] The other surface L'2 of the second lens is concave and spherical.

[0239] The surface L1 of the first lens is convex or flat.

[0240] The object-side surface S1 of the spectacle lens is the surface L1 of the first lens.

[0241] The surface S2 of the eyeball side of the spectacle lens is the surface L'2 of the second lens.

[0242] A specific example of the structure of the glasses in the second embodiment is as follows.

[0243] "A pair of glasses comprising:

[0244] The above-mentioned spectacle lenses; and

[0245] Eyeglass frames."

[0246] The spectacle lens and eyewear in Embodiment 2 are the result of a semi-finished lens having its eyeball-side surface F2 fixed. In Embodiment 2, the refractive power of the spectacle lens' eyeball-side surface S2, which is one of the multiple locations described in Patent Document 1, such as the interface between the reflective hologram and the lens substrate, and the interface between the lens substrate and the outside world, does not vary depending on the wearer's prescription. This is because, in Embodiment 2, a simple fixed lens type, the eyeball-side surface S2 of the spectacle lens is formed by the surface B'2 of the second lens blank, which served as the basis.

[0247] As a result, with the spectacle lenses and glasses in embodiment 2, the wearer can recognize a clear virtual image, and technical problem (2) can be solved.

[0248] The above describes the embodiments of the present invention, but 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 within the scope of the present invention without departing from its purpose. In addition, for the following modifications, the above disclosures can also be arbitrarily selected and combined.

[0249] The technical idea of the present invention is also reflected in a virtual image display system including the above-mentioned eyeglass lenses and a MEMS image light emitting portion for emitting image light, and a program for causing a computer to exhibit the functions realized by the system.

[0250] Description of Reference Numerals

[0251] 1…Spectacle lenses

[0252] S1…Object side of the eyeglass lens

[0253] S2…The eyeball-side surface of the eyeglass lens

[0254] 2…Holographic Department

[0255] 21…Holographic Layer

[0256] 21A…Exposure Department

[0257] 21B…non-exposed area

[0258] 22…base

[0259] H1…Object-side surface of the hologram

[0260] H2…Eyeball-side surface of the hologram

[0261] 3…First lens

[0262] L1…Object-side surface of the first lens

[0263] L2…The surface of the first lens on the eyeball side

[0264] 40…Second lens (in the reference example)

[0265] M…MEMS

[0266] E…eye

[0267] V…Light beam of a virtual image (from the image light emitting unit)

[0268] R… a beam of real image (from the outside world)

[0269] O…Pupil center and lens center

[0270] I…image of a virtual image.

Claims

1. A method for manufacturing a spectacle lens that satisfies a wearer's prescription, wherein the spectacle lens irradiates a holographic layer within the spectacle lens with laser light reflected by a MEMS (micro-electromechanical system) mirror, thereby allowing the wearer of the spectacle lens to recognize a virtual image, wherein: The invention has the following manufacturing steps: in accordance with the prescription, a semi-finished lens in which one surface (H1) of a plate-shaped holographic portion including the holographic layer is adjacent to one surface (B2) of two surfaces of a first lens blank is processed and set as the object-side surface (S1) of the eyeglass lens, thereby obtaining an eyeglass lens that meets the prescription.

2. The method for manufacturing a spectacle lens according to claim 1, wherein: The surface (S2) on the eyeball side of the eyeglass lens is the other surface (H2) of the hologram portion.

3. The method for manufacturing a spectacle lens according to claim 1, wherein: The hologram portion has a shape that follows the shape of the hologram layer.

4. The method for manufacturing a spectacle lens according to claim 1, wherein: The hologram portion is composed of the hologram layer bonded to a layered base portion.

5. The method for manufacturing a spectacle lens according to claim 1, wherein: A distance d2 from the eyeball-side surface (S2) of the spectacle lens to the hologram layer in the lens thickness direction is made smaller than a distance d1 from the object-side surface (S1) of the spectacle lens to the hologram layer in the lens thickness direction.

6. The method for manufacturing a spectacle lens according to claim 5, wherein: The value of d2 / d1 is 0.2 or less.

7. The method for manufacturing a spectacle lens according to claim 1, wherein: The hologram portion is in the shape of a cylinder curved in the horizontal direction. The face (H2) of the holographic portion is adjacent to one face (B'1) of the two faces of the second lens blank, The other surface (B'2) of the second lens blank is concave and spherical, In the manufacturing process, the surface (B1) of the first lens blank is formed into a convex or flat shape.

8. A semi-finished lens for manufacturing a spectacle lens that meets a wearer's prescription, wherein the spectacle lens allows the wearer of the spectacle lens to recognize a virtual image by irradiating a laser reflected by a MEMS (micro-electromechanical system) mirror onto a holographic layer within the spectacle lens, wherein: have: a first lens blank; and a plate-shaped holographic portion comprising the holographic layer, One of the two surfaces of the first lens blank (B2) is adjacent to one surface (H1) of the holographic portion, One of the two surfaces of the semi-finished lens (F1) is the other surface (B1) of the first lens blank, The other surface (F2) of the semi-finished lens is the other surface (H2) of the holographic portion.

9. A semi-finished lens for manufacturing a spectacle lens that meets a wearer's prescription, wherein the spectacle lens allows the wearer of the spectacle lens to recognize a virtual image by irradiating a laser reflected by a MEMS (micro-electromechanical system) mirror onto a holographic layer within the spectacle lens, wherein: have: a first lens blank; a second lens blank; and a plate-shaped holographic portion comprising the holographic layer, The hologram portion is in the shape of a cylinder curved in the horizontal direction. One of the two surfaces of the first lens blank (B2) is adjacent to one surface (H1) of the holographic portion, The face (H2) of the holographic portion is adjacent to one face (B'1) of the two faces of the second lens blank, The other surface (B'2) of the second lens blank is concave and spherical, One of the two surfaces of the semi-finished lens (F1) is the other surface (B1) of the first lens blank, The other face (F2) of the semi-finished lens is the face (B´2) of the second lens blank.

10. The semi-finished lens according to claim 8 or 9, wherein: The hologram portion has a shape that follows the shape of the hologram layer.

11. The semi-finished lens according to claim 8 or 9, wherein: The hologram portion is composed of the hologram layer bonded to a layered base portion.

12. The semi-finished lens according to claim 8 or 9, wherein: A distance t2 from the surface (F2) of the semi-finished lens to the holographic layer in the lens thickness direction is made smaller than a distance t1 from the surface (F1) of the semi-finished lens to the holographic layer in the lens thickness direction.

13. The semi-finished lens according to claim 12, wherein: The value of t2 / t1 is 0.2 or less.

14. A spectacle lens that satisfies a wearer's prescription, wherein the spectacle lens irradiates a holographic layer in the spectacle lens with laser light reflected by a MEMS (micro-electromechanical system) mirror, thereby allowing the wearer of the spectacle lens to recognize a virtual image, wherein: have: a first lens; and a plate-shaped holographic portion comprising the holographic layer, One of the two surfaces of the first lens (L2) is adjacent to one surface (H1) of the holographic portion, The object-side surface (S1) of the spectacle lens is another surface (L1) of the first lens, The surface (S2) on the eyeball side of the eyeglass lens is the other surface (H2) of the hologram portion.

15. A spectacle lens that satisfies a wearer's prescription, wherein the spectacle lens irradiates a holographic layer in the spectacle lens with laser light reflected by a MEMS (micro-electromechanical system) mirror, thereby allowing the wearer of the spectacle lens to recognize a virtual image, wherein: have: First lens; a second lens; and a plate-shaped holographic portion comprising the holographic layer, The hologram portion is in the shape of a cylinder curved in the horizontal direction. One of the two surfaces of the first lens (L2) is adjacent to one surface (H1) of the holographic portion, The surface (H2) of the holographic portion is adjacent to one of the two surfaces (L'1) of the second lens, The other surface (L'2) of the second lens is concave and spherical. The surface (L1) of the first lens is convex or flat. The object-side surface (S1) of the spectacle lens is the surface (L1) of the first lens, The surface (S2) on the eyeball side of the spectacle lens is the surface (L'2) of the second lens.

16. The spectacle lens according to claim 14 or 15, wherein: The hologram portion has a shape that follows the shape of the hologram layer.

17. The spectacle lens according to claim 14 or 15, wherein: The hologram portion is composed of the hologram layer bonded to a layered base portion.

18. The spectacle lens according to claim 14 or 15, wherein: A distance d2 from the eyeball-side surface (S2) of the spectacle lens to the holographic layer in the lens thickness direction is smaller than a distance d1 from the object-side surface (S1) of the spectacle lens to the holographic layer in the lens thickness direction.

19. The spectacle lens according to claim 18, wherein: The value of d2 / d1 is 0.2 or less.

20. A pair of glasses comprising: The spectacle lens according to claim 14 or 15; and Glasses frames.

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