JPH0572504A - Goggles which can correct sight, additive lens for correcting sight of goggles and production of both - Google Patents

Abstract

PURPOSE:To provide the additive lenses which have excellent optical characteristics and can well correct sight when surely attached to a goggle body and the visibility meeting the user's sight while the additive lenses are held attached to the goggle body. CONSTITUTION:The goggle body 10A of this case is of a general type and is imparted with the diopter of lenses. If the goggle body 10A is first selected by a person desirous of wearing the goggles, the design value of the additive lenses 20 is determined in accordance with the information on this goggle body 10A and the information on the user's sight. A monomer consisting essentially of a silicon resin is prepd. in accordance with the design value and thereafter, the additive lenses are produced by a cast molding method and are further cut to a prescribed shape. The resulted additive lenses 20 are attached to the rear surface Rg of the goggle body 10A complying with the design value without using an adhesive, by which the goggles meeting the user's sight are perfected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to goggles capable of compensating for visual acuity used in, for example, the field of sports and various industrial fields, an additional lens for compensating visual acuity of the goggles, and a method of manufacturing both.

[0002]

2. Description of the Related Art Generally, when reaching the age of 40 to 45, presbyopia spectacles are needed because the accommodative power of the eye decreases with age regardless of whether the person has an emmetropic eye, a myopic eye or a farsighted eye. Is coming.

In this case, a person with myopia or hyperopia must always carry presbyopia spectacles in addition to myopia or hyperopia spectacles to properly use them, which is very inconvenient. do.

In order to eliminate such inconvenience, bifocal spectacles for correcting distance vision and near vision with a single lens, and distance vision and intermediate vision (intermediate distance vision) and near vision Trifocal spectacles for correcting and with one lens, or multifocal spectacles such as progressive focus spectacles for continuously changing the focal length from far to near have been developed.

However, these spectacles have a drawback that the positions of the lens regions having different focal lengths are predetermined by the manufacturer, so that the positions of the lens regions cannot be changed after the spectacles are completed.

[0006] For example, when the near lens area is set to a slightly lower area of the eyeglasses for reading, it is considerably inconvenient to look up at an object on the shelf in the near lens area. It will not happen.

In order to improve such inconvenience, recently, the following types of spectacles for vision correction have been developed and used.

That is, at the position of the lens area of the spectacles which the wearer normally uses (hereinafter referred to as "regular spectacles"),
If necessary, an additional lens having a focal length necessary to see the desired object is configured to be detachably attached, and the diopter of this additional lens and the original diopter of the regular glasses are It is a pair of spectacles for visual acuity correction so that an intended subject can be seen with a synthetic diopter (composite focal length). In other words, the eyeglasses for correcting visual acuity are capable of imparting the corrected visual acuity suitable for seeing an intended object to the regular eyeglasses.

This vision correction spectacles is disclosed, for example, in Japanese Patent Publication No. 62-52287, which is the application of the present applicant, and Japanese Patent Laid-Open No. Hei.
As disclosed in JP-A-319190, an additional lens made of a soft synthetic resin such as a transparent silicone rubber or a vinyl chloride resin is used as a back surface (a surface close to an eyeball; hereinafter the same) or a front surface (external environment) of the additional lens. The same is true for the eyes. The eyeglasses for correcting visual acuity are configured to be adhered or adsorbed in such a manner that the surface facing the same.

In this case, in Japanese Patent Publication No. 62-52287, when the additional lens is adsorbed on the regular spectacles, the maximum distance between the back surface of the additional lens and the surface of the regular spectacles after adsorption is 1 mm or less. Adsorbing under such conditions, the technical feature is to suppress the change of the power on the additional lens side,
This is intended to improve the adverse effects of bonding using an adhesive such as balsam.

Further, in Japanese Laid-Open Patent Publication No. 1-319018, it is a technique to use either the front surface or the back surface of regular spectacles as a mold template when manufacturing an additional lens by a molding method (cast molding method). As a result, inefficiencies or complications due to the difference in lens curvature at the time of manufacturing the additional lens are made to correspond to the difference in the lens curvature on the front surface or the back surface of the regular spectacles that differs depending on the individual eyeglass wearer. I try to improve the quality.

On the other hand, in the above-mentioned Japanese Laid-Open Patent Publication No. 1-319018, such an additional lens for correcting visual acuity does not have the diopter of ordinary type glasses, but also sunglasses, goggles, or underwater glasses. The idea of releasably adhering to eyeglasses or eyeglass-like instruments is disclosed.

This is because the additional lens can be attached / detached to / from spectacles having a generally constant curvature such as sunglasses typified by sunglasses having a radius of curvature of 87 mm, and underwater spectacles made of a flat surface. It is to install.

[0014]

By the way, in the case of a general goggle which is widely used in the field of sports, for example, the front surface or the back surface is not always set to a generally constant curvature, It usually has a complicated shape such that some areas are formed by a flat surface, and some areas are formed by an aspherical surface or other complicated surfaces.

Therefore, it is not easy to attach an additional lens for visual acuity correction to such a general goggle while maintaining high accuracy.

The problem here is that the above-mentioned Japanese Patent Laid-Open No.
This is the content of the disclosed technology in Japanese Patent Laid-Open No. 31918.

This Japanese Patent Application Laid-Open No. 1-319018 discloses that
Although it is stated that goggles are also subject to vision correction, it is only in terms of letters, and how to attach an additional lens to goggles with complicated shapes to correct diopter. No technical disclosure has been made.

Therefore, it is almost impossible to make an additional lens suitable for general goggles by using the technique disclosed in Japanese Laid-Open Patent Publication No. 1-319018. It must be said that it is more difficult to removably attach to the required position above.

The present invention has been made in view of the above circumstances. A first object of the present invention is to provide a goggle body having a lens attachment surface on the back surface and a lens necessary for seeing the object. A visual acuity correction additional lens having a dioptric power is manufactured as a separate member, and the visual acuity correction additional lens is detachably attached to the lens attachment surface on the back of the goggle body without using an adhesive, so that the wearer can wear it. It is an object of the present invention to provide a goggle capable of correcting eyesight of a new type configured to give the goggles a lens power capable of correcting the eyesight.

A second object of the present invention is to provide an additional lens for visual acuity correction which is a constituent member of the goggle capable of correcting visual acuity and which is transparent and has excellent suction and excellent optical performance. is there.

A third object of the present invention is to provide a method of manufacturing such an additional lens for correcting visual acuity of such goggles with high processing accuracy and high manufacturing efficiency.

A fourth object of the present invention is to provide a manufacturing method with high manufacturing accuracy and high manufacturing efficiency, which relates to the goggle capable of correcting visual acuity as described above.

[0023]

In order to achieve the above first object, the invention according to claim 8 is characterized in that a goggle body having an additional lens attachment surface on the back surface, and a single optical function or the goggle body. It is composed of an additional lens for visual acuity correction capable of correcting the visual acuity of the wearer by the synthetic optical action of the above, and the surface of this additional lens for visual acuity correction and the lens attachment surface of the goggle body are bonded to each other without using an adhesive. It is characterized by being.

In order to achieve the second object,
According to a first aspect of the present invention, the front surface is formed as a surface which can be closely attached to a concave spherical surface, a concave rotationally symmetric aspherical surface or a flat surface formed on the back surface of the goggle body, and the back surface of the wearer's visual acuity. Is formed as a concave optical action surface for realizing a lens power capable of correcting the lens power and is composed of a synthetic resin material for a lens which is transparent, soft, and has a suction property.

Further, in order to achieve the third object,
The invention according to claim 2 is a method for manufacturing an additional lens for visual acuity correction, which has a surface attachable to a goggle body and has a lens dioptric power capable of correcting the visual acuity of the wearer, and a prescription for the visual acuity of the wearer. Or from this prescription and the optical information and frame information of the goggle body to be worn, the process of obtaining the final optical design value of the additional lens for vision correction, and the use of a transparent and soft synthetic resin material for the lens. A step of producing a raw material for molding the additional lens for eyesight correction, first and second molds forming a cavity for molding the additional lens for eyesight correction before edging, and a gasket for holding an outer peripheral portion of these molds. And a step of preparing a decomposable mold template comprising clamping means for clamping the first and second molds from the outside, respectively, and the step of forming the mold template in the mold template. A step of molding the additional lens for visual acuity correction before edging by using a molding method by filling raw materials, and an optical method for determining the attachment position of the additional lens for visual acuity correction on the lens attachment surface of the goggle body. According to the layout, the working process is configured so as to include a step of shaping the additional lens for vision correction before edging into a completed additional lens for vision correction.

Furthermore, in order to achieve the above-mentioned fourth object, the invention according to a tenth aspect of the present invention uses the goggle body having an additional lens attachment surface on the back surface, and the goggle body for a combined optical action. A method of manufacturing a goggle capable of correcting visual acuity, which comprises an additional lens for visual acuity correction capable of correcting visual acuity of a person, (a) selecting the goggle body as a first optical element, and (b) correcting Prescription for correcting the visual acuity of the wearer to be, and based on the optical information and frame information of the selected goggles body, the optical design value of the additional lens for vision correction to be attached to the back surface of the goggles body Determining step, and (c)
A step of obtaining an additional lens for vision correction before edging based on the optical design value by using a transparent and soft synthetic resin material for a lens and a molding processing method; and (d) optical information and frame information of the goggle body. Optically laying out the attachment position of the additional lens for visual acuity correction on the back surface of the goggle main body based on the prescription for the visual acuity correction, (e) based on at least the frame information of the goggle main body, A step of cutting the vision correction additional lens before edging to obtain a vision correction additional lens as a finished product; (f) the vision correction additional lens on the back surface of the goggle body without using an adhesive. It is characterized in that the working process is configured so as to include the step of attaching to the attachment position laid out in 1.

[0027]

The goggle constructed as described above is constructed so that the visual acuity can be corrected by the goggle main body and the additional visual acuity correction lens attached to the back surface of the goggle main body.

The goggle body is formed as an optical action area in which all or part of the effective visual field is provided with a lens power or a non-action area having no lens power, and the optical action area or the non-action area is formed. The back surface is formed as a lens attachment surface composed of a concave spherical surface or a concave rotationally symmetric aspherical surface or a flat surface.

The lens power of the additional lens for visual acuity correction is optically calculated based on a prescription for the visual acuity of the wearer measured in advance, or the goggles are based on this prescription and the optical information and frame information of the goggle body to be worn. A synthetic lens power of the main body and the additional lens for visual acuity correction is optically calculated to determine an optical calculated value of the lens power of the additional lens for visual acuity correction.

A synthetic resin material for the lens, such as a silicone resin material, which is transparent and soft and has an adsorbing property is used for the additional lens for visual acuity correction, and this lens is molded by a molding method. The front surface of the additional lens for visual acuity correction is formed in a shape that can substantially match the lens attachment surface of the back surface of the goggle body, and the back surface thereof has a concave shape that can realize a lens power based on the specified optical calculation value. It is formed as an optical action surface of.

Based on the prescription for correcting the visual acuity and at least the frame information of the goggle main body, the attachment position of the additional lens for the visual acuity correction is optically laid out on the back surface of the goggle main body and the prevention of air bubbles is performed. Therefore, a surfactant layer is formed at this attachment position.

The additional lens for visual acuity correction is directly attached at the attachment position on the back surface of the laid-out goggle body without using an adhesive, or the attachment position in the infiltrated state with the surfactant layer. It is attached without using an adhesive.

On the other hand, in the goggle capable of correcting visual acuity having a configuration different from that described above, a plurality of types of additional lenses for visual acuity correction having different lens powers are determined according to, for example, demand forecast and / or optical information of the goggle body. Alternatively, a plurality of types of additional lenses for visual acuity correction corresponding to the difference in frame information are determined, and a plurality of the determined multiple types of additional lenses for visual acuity correction are manufactured according to the above-mentioned procedure,
These are stocked appropriately.

That is, when the wearer who desires to correct the visual acuity selects the goggle body, the additional visual acuity correction additional lens having a lens dioptric power capable of correcting the visual acuity of the wearer is stored as the additional visual acuity correction additional lens group. To choose from.

The selected additional lens for visual acuity correction is
The goggles capable of correcting visual acuity are completed by attaching the goggles to the attachment position laid out on the back surface of the goggle body without using an adhesive.

[0036]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Prior to the description of the illustrated embodiments, the work sequence for manufacturing the goggle capable of correcting vision according to the present invention will be described.
Description will be given according to the work procedure diagram shown in FIG.

The vision-correctable goggles used in this specification refer to goggles in which an additional lens for vision correction (hereinafter simply referred to as "additional lens") is attached to the main body of the goggles. What is a lens?
It has the meaning of both being manufactured as several types of semi-finished lenses, and then being subjected to secondary processing such as cutting, cutting or polishing to make finish lenses, and those formed as finish lenses from the beginning. ..

When manufacturing the goggle capable of correcting the visual acuity of the present invention, (1) First, the diopter (including the astigmatism) with respect to the visual acuity of the goggle orderer (wearer) and the interpupillary distance PD are measured. The prescription value to be corrected is determined, and further, the purpose of using the ordered goggles, that is, whether it is for distance use, medium use, or near use is determined.

As a prescription for eyeglasses, generally, the lens power (spherical vertex refractive power) S, astigmatic vertex refractive power C, astigmatic axial direction AX, interpupillary distance PD, prism value, prism base direction, accommodation power, etc. However, in the present invention, the lens power S, the astigmatic vertex refractive power C, and the interpupillary distance PD are used exclusively. (2) Next, the goggle body to be worn is selected (specified) from both the viewpoint of the optical information of the goggle body (optical information when the goggle body is viewed as a lens) and the morphological viewpoint.

In other words, whether the goggle body 10A with a lens power is selected or the goggle body 10B without a lens power is selected in terms of optical information, and whether it is an integrally molded type (structure as shown in FIG. 2), A morphological selection is made between eyeglass type and underwater eyeglass type.

In this case, a partial area of the back surface of the goggle main body serves as an attachment surface of the additional lens regardless of whether or not the goggle main body is provided with a lens power, so that the entire surface or at least this partial area (additional lens (The planned attachment surface)
The concave spherical surface Rg or the flat surface having a predetermined curvature is formed in advance and placed. The above-mentioned optical information of the goggle body includes information such as lens power, refractive index, dispersive power, specific gravity and heat resistance. (3) The optical design of the additional lens 20 as shown in FIG. 3 is performed based on the determined prescription value, and the additional lens 20 is manufactured by the molding method based on the optical design value.

In this case, the surface of the additional lens 20 is set to be a convex spherical surface R ₁ (see FIG. 5) or a flat surface having substantially the same curvature as the curvature of the additional lens attachment scheduled surface Rg on the back surface of the goggle body. It is preferable to put it. This is because if there is a large curvature difference between the two surfaces Rg and R ₁ , bubbles or the like tend to be generated or mixed when the additional lens 20 is attached.

Therefore, the lens power (spherical vertex refractive power) S and the astigmatic vertex refractive power C of the additional lens alone can be realized by selecting the curvature on the rear surface (concave surface) R ₂ side of the additional lens. preferable. (4) Based on the information of the interpupillary distance PD and the use (application) distance of the goggles, the goggles main body 10A, 10B
The attachment position of the additional lens 20 with respect to is optically laid out. (5) After the layout is completed, for example, the additional lens 20
(Or, the outer peripheral edge of the additional lens semi-finished product 21 shown in FIG. 5) is cut or cut (hereinafter collectively referred to as “cutting”) to adjust the final shape of the additional lens 20. (6) The shaped additional lens 20 is attached to the layout position of the back surface Rg of the goggle body.

In this case, the attachment surface R ₁ which is the spherical surface on the convex side of the additional lens 20 is the back surface R of the goggle main body 10A, 10B.
The reason for setting g is that when the additional lens 20 is attached to the surface of the goggle body, the additional lens 20 is easily peeled off when an external force is applied to the surface of the goggle body, and is easily soiled under the influence of dust. This is to prevent these problems because they cause appearance problems.

The structure and manufacturing method of the illustrated embodiment will be described below. [I] When a goggle body with a lens power is selected.

Assuming that the wearer or the like has selected the goggle main body 10A having the lens power, which is of the integrally molded type as shown in FIG. 2, for example, the goggle main body 10A having the lens power is used for spectacles. Becomes the first optical element of the optical system, and the additional lens 20 attached to this becomes the second optical element of the spectacles. The goggle has a compound lens that is a combination of two lenses.

Therefore, when measuring the visual acuity of the wearer and the interpupillary distance PD according to the above item (1), at the same time, the goggle body to be worn according to the item (2) is also selected, and based on this, The prescription must be decided.

Therefore, the prescription determined in the item (1) is a prescription value in which optical information (hereinafter simply referred to as "optical information") as a lens of the selected goggle main body 10A is added, that is, the goggle main body. The prescription value is a combination of the optical information of 10A and the optical information of the additional lens 20.

The lens power of the goggles capable of correcting the visual acuity at this time (hereinafter referred to as "composite lens power") S ₀
And the combined focal length f ₀ (mm) when the goggle body 10A and the additional lens 20 are attached to each other are as follows: S ₁ : lens power of the goggle body 10A to which the lens power is given S ₂ : lens power of the additional lens 20 alone D ₁ : Lens refractive power that realizes S ₁ (Diopter) D ₂ : Lens refractive power that realizes S ₂ (Diopter) f ₁ : Focal length of the goggle body 10A (mm) f ₂ : Focal length of additional lens alone ( mm)

It is given by the equation S ₀ = S ₁ + S ₂ f ₀ (mm) = 1 / f ₁ + 1 / f ₂ .

The combined focal length f ₀ can be expressed by such an expression that the back surface of the goggle body 10A and the additional lens 2 are
This is because the optical arrangement is such that the surface of 0 and the surface of 0 are in close contact with each other while sharing the optical axis.

The prescription value determined under such conditions is, for example, as follows: Total spherical vertex refractive power (composite lens power) S ₀ = −3.
00 Diopter Overall astigmatic power (composite astigmatic power) C ₀ = -1.00
Diopter Astigmatic axis direction AX = 30 ° Spherical vertex power of the goggle body 10A S ₁ = -1.00
It is assumed that the diopter interpupillary distance PD = 64 mm and that the wearer desires goggles capable of vision correction for distance vision.

Next, the work of item (3) is carried out based on this prescription value. In this case, the optical design value of the additional lens 20 alone attached to the back surface of the goggle body 10A is the optical information of the goggle body 10A (S ₁ = -1.
00 Diopter, C ₁ = 0 Diopter) are excluded, and the design value of the additional lens 20 alone is as follows: The spherical vertex refractive power S ₂ = −2.00 Dio of the additional lens 20.
The astigmatic refractive power of the pter addition lens 20 is C ₂ = −1.00 Diopter Astigmatic axis direction AX = 30 °. (B) Material to be used The additional lens 20 is manufactured by a molding method using a transparent and soft synthetic resin material based on the above-mentioned design values. In this case, as the material used for the additional lens 20, for example, a material containing a silicone resin as a main component is selected.

This silicone resin has excellent transparency,
It exhibits softness, adsorptivity, and has excellent general properties such as heat resistance, chemical resistance, and safety.Because the resin component is injected into the mold and polymerized, it becomes rubber-like,
A silicone lens can be easily obtained.

Moreover, since the optical reproducibility with respect to the lens design is excellent, it is particularly suitable as a material for a cemented lens such as the additional lens 20 of the present invention. In addition, since it has small shrinkage and excellent size and shape stability, it also has the feature of good transferability during molding.

Such silicone resins are classified into addition type and condensation type depending on the curing mechanism. As the addition type silicone resin, a liquid silicone rubber for molding (for example, “TSE345 manufactured by Toshiba Silicone Co., Ltd.
0 "), various resin materials used for electronic materials (for example," XE14-A3011 "manufactured by Toshiba Silicone Co., Ltd.,
"XE15-A2977", Shin-Etsu Chemical Co., Ltd. "KE
-106 "," SE-1740 "manufactured by Toray Dow,
"CY52-205" and the like) are preferable.

In this case, the viscosity of the silicone resin used is 25 ° C. and has a refractive index (nd) of 1.40 to 1.4.
5 is in the range of 3000 to 5000 CP, and refractive index is in the range of 1.46 to 1.50 is 5000 to 1000.
Those in the range of 0 CP can be preferably used. If the viscosity is higher than this, workability will deteriorate,
It should be noted that the problem of becoming hard occurs, and that when the viscosity is lower and higher than this, it tends to be brittle and easily broken into pieces.

Considering the overall physical properties of the lens in consideration of the above circumstances, the physical property values in the vicinity of refractive index = 1.48, hardness (JIS A) = 40, tensile strength = 38 kg / cm ² It is preferable to set it as a reference.

Now, in consideration of such various matters, the material to be used is selected, and if necessary, a curing agent is added to shorten the curing time at the time of molding, and the monomer resin which is the raw material of the additional lens 20 is added. A liquid (monomer liquid) is prepared.

In this case, it is possible to add a curing accelerator to the monomer resin liquid (monomer component) in addition to the above-mentioned curing agent.

As the curing accelerator, "X-93-405" manufactured by Shin-Etsu Chemical Co., Ltd. as an addition type, and as a condensation type,
A curing accelerator such as "CAT-RS" manufactured by Shin-Etsu Chemical Co., Ltd. can be used.

In the case of the addition type "X-93-405", the curing time is set to 1 by adding 1% to the main agent.
It can be shortened to / 2. Therefore, there is an effect that the curing time can be controlled depending on the application and working conditions.

In addition to the curing agent and the curing accelerator, it is also possible to add an ultraviolet absorber, a dye, a photochromic substance, etc., which are generally used additional functional substances for the lens, to the monomer resin liquid. Is. (B) Molding method The monomer resin liquid prepared in this manner is molded as the additional lens 20 by using a molding processing method. In this case, the lens molding method is generally used injection molding method, compression molding method. Method, injection compression molding method, cast molding method, spin cast molding method and the like can be used, but the cast molding method is preferable from the viewpoint of lens accuracy. Then, when the cast molding method is adopted, as the mold template 30, for example, a mold template having a configuration as shown in FIG. 4 is used.

This mold mold 30 is used for the additional lens 20.
Which forms the cavity 31 corresponding to (the additional lens 2
A pair of surfaces 31a, 31b forming the optical surface 0) are mirror-polished, and a pair of glass molds 32 and 33 are provided, and two glass plates are provided so that the lens center thickness d of the additional lens 20 is obtained. It is a disassembled combination mold mold having a structure composed of a ring-shaped resin gasket 34 combined with the outer peripheral portions of the molds 32, 33.

As the mold, various materials other than the above-mentioned glass mold can be used, and for example, metallic, ceramic, fine ceramic, plastic and the like can be used. Further, a spring, rubber, adhesive tape or the like can be used as a tightening means for tightening the mold and the gasket.

In this case, the resin gasket 34 is made by selecting a resin material that does not melt in the monomer resin liquid at the time of molding, and as the material, for example, a fluorine-based material or an ethylene-based material is preferable, Further, at the time of molding, the cavity forming surfaces 31a, 31 of the mold mold 30 are formed.
It is preferable to use a release agent such as a fluorine-based release agent for b.

In the case of a gasket made of, for example, a fluororesin, an aromatic monomer (for example,
Styrene, benzyl methacrylate, etc.) is mixed with the silicone resin solution, and it exhibits excellent heat resistance in heat polymerization at relatively high temperatures. (C) Polymerization method As a method for polymerizing the monomer resin liquid at the time of molding, photopolymerization using ultraviolet rays or the like, thermal polymerization, in-water polymerization and the like can be used, and among them, thermal polymerization is particularly preferable.

The polymerization time at this time cannot be generally specified because it depends on the polymerization method, but it is about 30 seconds to 5 minutes in the case of photopolymerization, and is of the addition type in the case of thermal polymerization. One standard is that the curing accelerator is added at about 120 to 180 ° C. for 15 minutes to 2 hours, and the condensation type curing accelerator is added at room temperature for 2 to 12 hours.

After the additional lens 20 is manufactured in this manner, the goggle main body 10A is manufactured based on the above item (4).
The operation of optically laying out the attachment position of the additional lens 20 on the back surface of the is performed.

This optical layout work is centered on the aforementioned prescription value including the interpupillary distance PD = 64 mm and the astigmatic axis direction AX = 30 °, the frame information of the goggle body 10A and the design information of the additional lens 20. In this layout work, it is the most important work to form the goggle main body 10A and the eyeball of the wearer as an integrated optical system in this layout work. Therefore, it is important to accurately set the eye point. ..

In this case, the frame information of the goggle main body 10A includes the above-mentioned optical information, frame information (shape, structure, curvature, size, etc.), frame PD, information used (material) information and the like. In addition, the additional lens 20
The design information of means the information including the optical information of the additional lens 20, the lens outer shape information including the outer diameter, the lens center thickness information, the outer peripheral edge thickness information, and the like. The optical information of the additional lens 20 includes information such as lens power, refractive index, dispersion, specific gravity and heat resistance.

To determine the eye point, the purpose of use of the goggles, the interpupillary distance PD, and the amount of vergence of the wearer (generally, 2.5 mm is used as the inward distance, but there are individual differences. ), Etc. is used, but when setting it, place the attached X / Y coordinate type scales on the top and bottom, left and right parts of the goggle body 10A, and use this scale, etc. And set the correct eyepoint position.

Then, the position of the determined eye point is
As shown in FIG. 2, it is desirable to mark the paint marks 11 and 12 using erasable ink or the like.

Such layout work is generally performed by
For example, a projection-type layout device (for example, "CM310" manufactured by Hoya) used when preparing eyeglasses, or an eye point gauge as disclosed in Japanese Patent Laid-Open No. 63-6521 is used.

It can be said that it is also a practical method to confirm the pupil position with the goggles body 10A worn by the wearer at the time of preparation and set the eye point position based on this.

After the optical layout work is completed in this manner, the outer peripheral edge of the additional lens 20 (or the additional lens 21 before edging) is cut based on the above item (5). Then, the work for adjusting the final shape of the additional lens 20 is performed.

As the cutting method at this time, a method using an ultrasonic cutter, a method using a water jet, and the like can be used in addition to the method using a normal type cutter (blade). In this case, considering that the silicone-based resin is soft and difficult to cut, it is preferable to use a method using an ultrasonic cutter that makes the cut surface smoother.

In order to omit this cutting work,
It is also possible to preliminarily assume the final shape of the additional lens 20 and simultaneously mold the outer peripheral edge and the like when molding the lens. This method is particularly effective in the case of goggles without astigmatism correction, for example.

When the shaping operation of the additional lens 20 is completed, the additional lens 20 is positioned at the layout portion of the back surface Rg of the goggle body 10B so that the front surface R ₁ of the additional lens 20 is lightly and uniformly spread. However, since the silicone resin can be easily attached by utilizing the softness and adsorptivity of the silicone resin, it is not necessary to use an adhesive as in the conventional case.

The goggle body 10B and the additional lens 2
When there is a possibility that air bubbles may be mixed in the attachment surface with 0, in order to prevent this, for example, commercially available household detergents and eyeglass cleaners (“Hoya Clean” manufactured by Hoya Corporation) are representative. It is preferable that the solution containing the surfactant is applied to the back surface Rg of the goggle body 10B or the front surface (attachment surface) R ₁ of the additional lens 20. However, goggles body 1
It is additionally noted that it is not an essential requirement of the present invention to apply a solution containing a surfactant to the attachment surfaces of 0B and the additional lens 20. [II] When a goggle body having no lens power is selected.

At this time, for example, the goggle body 10B shown in FIG. 2 simply serves as a transparent support member for supporting the additional lens 20, and in other words, the goggle body 10 is used.
Since B itself does not become the first optical element constituting the spectacles, the optical design value of the additional lens 20 coincides with the prescription value measured according to the above item (1).

Therefore, the additional lens 20 is manufactured based on the optical design value at this time by using the molding method, and the molded additional lens 20 is manufactured according to the above-mentioned procedure.
Attach it to 0B.

Next, a specific manufacturing method will be described step by step, using an example in which the wearer selects the goggle body 10B having no lens power as a typical example.

First, the diopter (including astigmatism) and the interpupillary distance PD with respect to the visual acuity of the orderer of the goggles capable of correcting visual acuity.
Goggle body 10B to be decided on and to wear
Select.

Then, the prescribed value of the wearer at this time is the spherical vertex refractive power S ₀ = S ₂ = −1.00 Diopter astigmatic refractive power C ₀ = 0, the interpupillary distance PD = 64 mm, and is also selected. The optical information and frame information of the goggle body 10B are of the integrally-molded type as shown in FIG. 2, and the lens power S ₁ and the curvature radius Rg of the back surface (concave surface) rg are S ₁ = 0 Diopter rg = -100 mm, respectively. It was.

Next, an addition type silicone resin (“KE-106LTV” manufactured by Shin-Etsu Chemical Co., Ltd.) which is the main component 10
0% by weight and 10% by weight of a curing accelerator (Catalyst RG) were placed in an appropriate glass container at room temperature and stirred for 5 minutes by an electric motor type stirrer equipped with stirrer blades, and further vacuumed. Defoam for 30 minutes in the additional lens 20
A monomer resin liquid (monomer liquid) that is a raw material of is prepared.

On the other hand, a mold mold 30 as shown in FIG. 4 is prepared for use in molding the additional lens 20.

This mold mold 30 is, for example, as shown in FIG. 5, a circular lens having an outer diameter of 75 mm and an additional lens 21 before edging.
The inner surface (the surface corresponding to 31a) of the first glass mold 32 that is installed above the goggles so that the front surface R ₁ of the additional lens 20 can be brought into close contact with the back surface Rg of the goggle body 10B. It is formed as a concave spherical surface having the same radius of curvature (-100 mm) as the back surface Rg of the main body 10B and is polished into a mirror surface.

That is, on the surface R ₁ of the additional lens 20, −
It is set so as to give a convex spherical surface having a radius of curvature r ₁ of 100 mm.

Further, the outer surface (surface corresponding to 31b) of the second glass mold 33 installed below is such that the additional lens 20 can obtain the spherical vertex refractive power of S ₂ = -1.00 Diopter. It is formed as a convex spherical surface with a radius of curvature of 80 mm and is polished into a mirror surface. That is, the back surface R ₂ of the additional lens 20 is set so as to give a concave spherical surface having a radius of curvature of 80 mm.

Further, the gasket 3 made of ethylene resin is used.
No. 4 is manufactured, and two glass molds are formed by the gasket 34 so that the cavity 31 corresponding to the additional lens 21 before edging and the optical axis interval d can be formed between the two glass molds 32 and 33. Hold 32 and 33 together.

Then, by using an appropriate spring means 35, above the first glass mold 32 and the second glass mold 33.
Tighten from below to assemble the three mold members 32-34 in a disassembleable state.

Prior to the injection of the above-mentioned monomer liquid, the inner surface (31a surface) of the first glass mold 32 and the outer surface (31b surface) of the second glass mold 33, which form the cavity 31, are formed. A release agent layer containing fluorine (for example, "MS-543" manufactured by Daikin Co., Ltd.) is applied in advance to form a release agent layer.

After the preparation of the mold mold 30 is completed in this way, the above-mentioned monomer resin liquid is injected into the mold mold 30 and heat curing is carried out for 2 hours at a temperature rise of 50 to 90 ° C.

After cooling for a predetermined time, the mold template 30 is disassembled to take out a transparent circular silicone resin copolymer (not shown) having an outer diameter of 75 mm, and subsequently, this silicone resin copolymer is applied to its concave surface. In a state where R ₂ is faced down, the additional lens 21 before edging as shown in FIG.
To make.

In this manufacturing method, the mold template 3
It is designed to reheat and cure after decomposing 0 and taking out the silicone resin copolymer. However, this is because the gasket 34 made of ethylene resin has insufficient heat resistance and the temperature is 150 ° C.
This is because it cannot be heated above. Therefore, for example, when a heat resistant gasket made of a fluororesin is used, it is possible to carry out heat polymerization at 150 ° C. from the beginning.

The additional lens 21 before edging thus produced exhibits excellent transparency, and its optical physical properties are
Refractive index nd = 1.405, radius of curvature of surface (convex surface) r ₁ =
The radius of curvature of the back surface (concave surface) was r ₂ = 80 mm, the lens power was −1.00 Diopter, the outer diameter was 75 mm, and the lens center thickness was 1 mm.

On the other hand, the layout work for the goggle main body 10B is performed by using, for example, a projection type layout device so as to be parallel to the work for manufacturing the additional lens 21 before edging.

Then, in this layout work, the paint marks 11 and the above-mentioned paint marks 11 are attached to the attachment positions of the two additional lenses 20 set in the surface area of the goggle body 10B.
Then, a back surface Rg of the goggle main body 10B is coated with a surfactant (for example, the above-mentioned “squirt clean”) and placed.

In the cutting work of the additional lens 21 before edging, the width of the attachment region on the goggle body 10B and the spectacle field of view required by the wearer are made to correspond to each other before edging on the goggle body 10B. The effective field of view of the additional lens 21 is determined, and based on this, the outer peripheral edge 21a of the additional lens 21 before edging is cut using, for example, an ultrasonic cutter, and shaped into an edging lens having a predetermined shape. .. That is, the additional lens 21 before edging is shaped as the additional lens 20 as shown in FIG.

It should be noted that the order of the work steps described so far can be changed as required, or the steps can be performed in parallel.

Finally, the attachment work is performed. In this work, first, the optical center point 20a of the additional lens 20 is painted on the surface of the goggle body 10B.
The surface R ₁ of the additional lens 20 is brought into contact with the back surface Rg of the goggle body 10B which is wet with the surfactant while adjusting to 12, and then the additional lens 20 is kept in this state so that air bubbles do not enter. It is carried out in such a manner that it is attached to the goggle body 10B while being lightly pressed.

In this way, the goggles capable of correcting the visual acuity as shown in FIG. 6 are completed, but the attachment work may be performed by the maker side or the sales side, or by the wearer himself.

Although the embodiment and the specific manufacturing method have been described above, the present invention is not limited to this, and various modifications can be made without departing from the scope of the invention.

For example, in the illustrated embodiment, when manufacturing goggles capable of correcting visual acuity, the goggles main body 10A, 10B is manufactured.
Manufacturing is performed according to the above-described operation sequence regardless of whether or not the lens power is given to the lens, but the present invention is not limited to such an operation order.

Further, in the illustrated embodiment, the additional lens is manufactured and attached to the goggle body in the working process at the time of manufacturing. However, when the additional lens is manufactured and when the additional lens is attached to the goggle body. It is also possible to make the attachment time different.

For example, a plurality of types of additional lenses, which are considered to be statistically in high demand, are prepared in advance for different lens powers.
And / or different goggle body forms are manufactured in a semi-finished lens state or a finish lens state, and they are stocked and placed, and when the goggle body is selected, the prescription of the wearer at that time is made. Select additional lenses with matching lens powers, or
It is also possible to select an additional lens suitable for the selected form of the goggle body (in particular, the back surface curvature) and attach the selected additional lens to the goggle body without using an adhesive. The use of this method brings about the effects of being economical and shortening the delivery time.

In the illustrated embodiment, the integrally molded type goggle body is described as an example, but the present invention can be sufficiently applied to other types of goggle bodies.

When a lens power is applied to the goggle body, it is convenient to form the surface of the effective visual field area as an optical action surface that can obtain the lens power.

[0110]

As described above, when the present invention is used, the goggle body having the lens attachment surface on the back surface and the additional lens for visual acuity correction having the lens power necessary to see the desired object are separated. As a member of, and by attaching this additional lens for visual acuity to the lens attachment surface on the back surface of the goggle body detachably without using an adhesive,
It was possible to realize a new type of goggles capable of correcting eyesight, which is configured to give the goggles a lens power capable of correcting the eyesight of the wearer.

Further, according to the present invention, it is possible to realize an additional lens for visual acuity correction which is a constituent member of a goggle capable of correcting visual acuity and which is excellent in absorptivity and transparency and has good optical performance.

Further, it is possible to realize a manufacturing method with high manufacturing accuracy and high manufacturing efficiency concerning the goggles capable of correcting the visual acuity and the additional lens for the visual acuity correction.

Therefore, the goggle capable of correcting visual acuity according to the present invention is used only for visual acuity correction when the lens power for myopia and hyperopia progresses as the eyes grow older, or when myopia and hyperopia change to presbyopia. The effect is that the visual acuity can be corrected by simply changing the additional lens and by a simple operation.

Further, in the goggle capable of correcting the visual acuity of the present invention, since the additional lens for visual acuity correction is configured to be attached to the inner surface of the goggle body, the additional lens for visual acuity correction is protected from the external force. Also occurs. Therefore, it is suitable as a goggle capable of correcting visual acuity for the field of sports and the field of industry that are susceptible to external force.

[Brief description of drawings]

FIG. 1 is a work procedure diagram showing a work sequence when manufacturing goggles capable of correcting vision according to the present invention.

FIG. 2 is a perspective view showing the appearance of an integrally-molded goggle main body that constitutes the goggle capable of correcting vision in FIG.

FIG. 3 is a perspective view of an additional lens for visual acuity correction attached to the goggle body of FIG. 2, viewed from the back side.

FIG. 4 is a cross-sectional view showing a configuration of a mold template used when manufacturing the additional lens of FIG. 3 by a casting method.

FIG. 5 is a transverse sectional view on the optical axis showing the configuration of an additional lens before edging before edging.

FIG. 6 is a perspective view of the goggle capable of correcting vision, that is, the goggle capable of correcting vision, in which an additional lens is attached to the back surface of the goggle body, as viewed from the back surface.

[Explanation of symbols]

10A Goggles body with lens power 10B Goggles body without lens power 11,12 Paint mark 20 Additional lens for vision correction (additional lens) 20a Optical center of additional lens 21 Additional lens before edging (additional lens) 21a outer peripheral edge of the additional lens before edging 30 mold mold used for casting 31 cavities 31a, 31b surfaces forming a cavity (a pair of surfaces forming an optical surface of the additional lens) 32, 33 a pair Glass mold 34 Resin gasket 35 Spring means d Spacing on the optical axis of the optical surface rg Curvature radius of the back surface of the goggle body r ₁ Curvature radius of the additional lens surface r ₂ Curvature radius of the rear surface of the additional lens R ₁ Additional lens surface R ₂ Additional lens Back side

Claims (15)

[Claims] 1. A front surface is formed as a surface that can be closely attached to a concave spherical surface or a concave rotationally symmetric aspherical surface or a flat surface formed on the back surface of the goggle body, and the back surface can correct the visual acuity of the wearer. An additional lens for visual acuity correction, which is formed as a concave optical action surface for realizing a lens power and is made of a synthetic resin material for a lens that is transparent, soft, and has a suction property. 2. A surface that can be attached to the goggle body,
And, in the method for manufacturing an additional lens for visual acuity correction having a lens power capable of correcting the visual acuity of the wearer, from the prescription for the visual acuity of the wearer, or from this prescription and the optical information and frame information of the goggle body to be worn, The step of obtaining the final optical design value of the additional lens for vision correction, the step of making the molding raw material of this additional lens for vision correction using a transparent and soft synthetic resin material for the lens, and the visual acuity before edging From the first and second molds that form the cavity for molding the additional lens for correction, the gasket that holds the outer peripheral portions of these molds, and the tightening means that tightens the first and second molds from the outside respectively. And a step of preparing a decomposable mold template, and filling the molding raw material into the mold template to correct visual acuity before the edging by using a molding method. The additional lens for visual acuity correction before edging is a completed product according to the step of molding the additional lens and the optical layout for determining the attachment position of the additional lens for visual acuity correction on the lens attachment surface of the goggle body. A method of manufacturing an additional lens for visual acuity correction which can be attached to a goggle body, comprising a step of shaping the additional lens for visual acuity correction. 3. The back surface of the additional lens for visual acuity correction having a surface capable of being attached to the goggle body and having a lens power capable of correcting the visual acuity of the wearer has a lens power of this additional lens for visual acuity correction. It is formed as a concave optical action surface for realizing, the molding raw material of the additional lens for vision correction is a monomer resin liquid made of a silicone resin material, and the gasket of the mold mold is made of a synthetic resin material, The step of filling the molding raw material in a mold and molding the additional lens for visual acuity correction before edging by using a molding processing method is to inject the monomer resin liquid into the mold mold, and cast molding method. Partial step of molding the silicone resin copolymer relating to the additional lens for visual acuity correction before edging by heating / curing at a temperature rise of 50 to 90 ° C. using After the completion of the first partial step, the mold mold is decomposed to take out the silicone resin copolymer, and the taken silicone resin copolymer is placed at 50 to 180 ° C. with its concave optical surface facing downward. The method for manufacturing an additional lens for visual acuity correction attachable to a goggle body according to claim 2, wherein the working step is configured so as to include the second partial step of performing heating and curing again. 4. A surface that can be attached to the goggle body,
In addition, in the method for manufacturing an additional lens for visual acuity correction having a lens dioptric power capable of correcting the visual acuity of the wearer, in the method of manufacturing the additional lens for visual acuity The process of obtaining the final optical design value of the lens, the process of making the molding raw material of this additional lens for vision correction using a transparent and soft synthetic resin material for lenses, and the additional lens for vision correction as a finished product Disassembling: first and second molds that form a cavity for molding, resin gaskets that hold the outer peripheral parts of these molds, and tightening means that tighten the first and second molds from the outside. A step of preparing a possible mold template, and filling the molding raw material into the mold template and using a molding method to add an additional lens for vision correction before edging. A method of manufacturing an additional lens for visual acuity correction that can be attached to a goggle body, characterized in that the working process is configured to include a process of molding. 5. The surface forming one side of the cavity of the first mold of the mold mold for forming the cavity for the eyesight correction additional lens is the shape of the surface of the eyesight correction additional lens or the goggle body to be worn. It is formed as a surface that can realize the shape of the lens attachment surface and is mirror-polished, and constitutes the other formation surface of the cavity related to the additional lens for vision correction of the second mold of the mold mold. The surface is formed as a mirror-polished surface having a shape that can realize the shape of the back surface of the vision correction additional lens, and the molding raw material of the vision correction additional lens is filled or injected into the mold mold. 5. The working step is configured so that a release agent layer is formed on both of the polished surfaces prior to the step. Impregnated possible vision manufacturing method of correcting the additional lens goggle body was. 6. A concave spherical surface or a concave rotationally symmetric aspherical surface or a flat surface is provided on the back surface of its own effective visual field area for attaching an additional lens for visual acuity correction having a lens power capable of correcting the visual acuity of the wearer. The goggle body of the goggles capable of correcting eyesight, which is characterized by being composed of 7. An optical action area having a lens dioptric power capable of correcting the visual acuity of the wearer is formed in its own effective visual field area, and the remaining correction amount of the diopter of the wearer is realized on the back surface of the optical action area. A goggle main body of goggle capable of correcting visual acuity, comprising a concave spherical surface or a concave rotationally symmetric aspherical surface or a plane for attaching an additional lens for correcting visual acuity. 8. A goggle main body having an additional lens attachment surface on the back surface, and an additional lens for visual acuity correction capable of correcting the visual acuity of the wearer by a single optical effect or a synthetic optical effect of the goggle main body. A goggle capable of correcting visual acuity, wherein the surface of the additional lens for visual acuity correction and the lens attachment surface of the goggle body are connected to each other without using an adhesive. 9. The additional lens for visual acuity correction is configured as a lens molded by a molding method using a silicone-based synthetic resin material, and the lens attachment surface of the goggle body is a concave spherical surface or concave rotational symmetry. The goggle capable of correcting visual acuity according to claim 8, wherein the goggle is formed of an aspherical surface or a flat surface. 10. A visual acuity-correctable device comprising a goggle main body having an additional lens attachment surface on the back surface and an additional visual acuity correction lens capable of correcting the visual acuity of the wearer by a synthetic optical action of the goggle main body. In the method of manufacturing goggles, (a) a step of selecting the goggle body as a first optical element; (b) a prescription for correcting the visual acuity of the wearer to be corrected; A step of determining an optical design value of the additional lens for visual acuity correction to be attached to the back surface of the goggle body based on the optical information and the frame information, and (c) a synthetic resin material for a transparent and soft lens and a molding method. To obtain an additional lens for visual acuity correction before edging based on the optical design value, (d) optical information and frame information of the goggle body, and the visual acuity correction For optically laying out the attachment position of the additional lens for visual acuity correction on the back surface of the goggle body based on the prescription for (e) before the edging based on at least the frame information of the goggle body. Cutting the additional lens for vision correction to obtain a final lens for vision correction as a finished product, and (f) laying this additional lens for vision correction on the back surface of the goggle body without using an adhesive. A method of manufacturing goggles capable of correcting visual acuity, characterized in that a working process is configured so as to include a process of affixing at an attachment position. 11. A goggle capable of compensating for visual acuity, which comprises a goggle body having a lens attachment surface on the back surface, and an additional lens for visual acuity correction capable of compensating the visual acuity of a wearer by a synthetic optical action of the goggle body. (A) measuring the visual acuity of the wearer to be corrected to determine a prescription for visual acuity correction; (b) selecting the goggle body as a first optical element; (C) A step of determining an optical design value of an additional lens for visual acuity correction to be attached to the back surface of the goggle main body, based on the selected optical information and frame information of the goggle main body and the prescription for the visual acuity correction. And (d) a step of obtaining a visual acuity correction additional lens as a finished product based on the optical design value by using a transparent and soft synthetic resin material for a lens and a molding processing method, and (e) The step of optically laying out the attachment position of the additional lens for visual acuity correction on the back surface of the goggle main body based on the optical information and frame information of the goggle main body and the prescription for the visual acuity correction, (f) A step of attaching an additional lens for vision correction to an attachment position laid out on the back surface of the goggle body without using an adhesive, and a working step configured to include: Production method. 12. A method of manufacturing goggles capable of correcting visual acuity, which comprises a goggle main body having a lens attachment surface on the back surface and an additional lens for visual acuity correction capable of correcting visual acuity of a wearer by a single optical action. a) a step of determining an optical design value of the additional lens for visual acuity correction based on a prescription for correcting a visual acuity of a wearer to be corrected, and (b) a synthetic resin material for a transparent and soft lens and a molding method. A step of obtaining an additional lens for vision correction before edging based on the optical design value, (c) a step of selecting the goggle body, and (d) at least frame information of the goggle body and the vision correction. Optically laying out the attachment position of the additional lens for visual acuity correction on the back surface of the goggle main body based on the prescription for (e) at least the goggle. A step of cutting the vision correction additional lens before edging to obtain a vision correction additional lens as a finished product based on the frame information of the glue main body; (f) the goggle main body without using an adhesive. A method of manufacturing goggles capable of correcting visual acuity, comprising: a step of attaching the additional lens for visual acuity correction to an attachment position laid out on the back surface, and a work process including: 13. A method of manufacturing goggles capable of correcting visual acuity, which comprises a goggle main body having a lens attachment surface on the back surface and an additional lens for visual acuity correction capable of correcting the visual acuity of a wearer by a single optical action. a) measuring the visual acuity of the wearer to be corrected and determining a prescription for visual acuity correction; and (b) determining an optical design value of the additional lens for visual acuity correction based on the prescription for visual acuity correction. And (c) a transparent and soft synthetic resin material for a lens and a molding process to obtain an additional lens for visual acuity correction based on the optical design value, and (d) the goggles A step of selecting a main body, and (e) an additional lens for visual acuity correction on the back surface of the goggle main body based on at least the frame information of the goggle main body and the prescription for the visual acuity correction. Optically laying out the attachment position; (f) attaching the additional lens for visual acuity correction to the attachment position laid out on the back surface of the goggle body without using an adhesive; (g) the visual acuity A step of attaching a correction additional lens to an attachment position laid out on the back surface of the goggle body without using an adhesive, and a working step is configured to include: Production method. 14. A step of producing a plurality of types of additional lenses for vision correction as the finished product corresponding to the difference in lens power or the difference in optical information or frame information of the goggle main body, The step of stocking the prepared additional lens for eyesight correction, and when the wearer selects the goggle body, the additional lens for eyesight correction having at least a lens power capable of correcting the eyesight of the wearer is stocked. And a step of attaching the selected additional lens for vision correction to the attachment position laid out on the back surface of the goggle body without using an adhesive. The method for manufacturing goggles capable of correcting visual acuity according to any one of claims 11 to 13, wherein the working process is configured to include the working process. 15. The selected additional lens for visual acuity correction,
The step of attaching to the attachment position laid out on the back surface of the goggle body without using an adhesive is a first partial step of forming a surfactant layer on the back surface of the goggle body, and wetting with the surfactant layer. 15. The method for manufacturing goggles capable of correcting visual acuity according to claim 11, further comprising a second partial step of attaching the additional lens for visual acuity correction to the back surface of the goggle main body in the state.