JPS63109412A - Diver glasses for shortsighted person - Google Patents

Abstract

PURPOSE:To make it possible for a shortsighted person to use diver glasses comfortably in water or in the sea by constituting the diver glasses of a late-like body made of plastic and forming concave faces having curvature displaying a lens effect on its rear face correspondingly to both the eyes. CONSTITUTION:The concave faces 4a, 4b having a diameter (d) are formed on the portions corresponding to both the eyes on the rear face 3 of the diver glasses 1 to be the plate-like body consisting of a transparent plastic material by grinding or polishing so as to be used as concave lens parts because the concave faces 4a, 4b are provided with curvature displaying a lens effect. When respective diameters (d) of the concave faces 4a, 4b are small, the diver glasses are not preferable because their visual fields are not sufficiently obtained and are narrowed. On the other hand, the diver glasses with a large diameter (d) are not also preferable because the interval between the concave faces 4a, 4b is narrowed, their visual fields are mutually overlapped and the strength at the part is reduced. Thus, the diver glasses with a proper diameter (d) makes it possible for a shortsighted person to catch an object clearly in his visual field at the time of diving into water or into the sea.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to diver glasses for close relatives that can be comfortably used by myopic people underwater or under the sea.

[Prior Art] When working or swimming underwater, that is, diving, it is essential for divers to wear diver glasses to protect their eyes. BACKGROUND ART Conventionally, glass diver glasses of various shapes, such as circular and oval shapes, have been put into practical use.

In particular, the fish and shellfish farming industry has developed recently, and work in and under the sea has become more common.On the other hand, recreational diving has become popular, and demand for diver glasses has increased. Multifunctionality is strongly desired. However, diver glasses are primarily made of toughened glass to prevent damage and breakage. However, tempered glass has a problem in that when it is cut or polished to give it a concave or convex surface, for example, the glass breaks. Of course, pre-processed glass may be tempered, but in this case, heating and quenching in the first strengthening process involve slight deformation, causing distortion of the curved surface that requires high precision, so it is not suitable, and in reality has not been adopted by
Under these circumstances, among glass diver glasses, there is no diver glass for myopic grooves in which a concave surface with a curvature that produces a lens effect is formed on the back surface.

On the other hand, plastic diver glasses have also been reprinted, but their functions have not left the realm of glass diver glasses, and there are no diver glasses for myopia.

Due to the current situation described above, myopic people are forced to choose between diving, despite the considerable inconvenience and risk, or not diving at all.

[Problems to be Solved by the Invention] An object of the present invention is to provide a myopic groove diver that allows myopic people to comfortably perform diving, which is considered inappropriate for myopic people due to the above-mentioned problems. This is an attempt to provide a new type of glass.

[Means for solving the problems] In other words, the present invention provides diver glasses of arbitrary shape,
The diver glasses consist of plates of plastic acid;
These diver glasses for myopic grooves are characterized in that a concave surface with a curvature that produces a lens effect is formed on the back surface corresponding to both eyes.

The diver glass of the present invention is realized by being a plastic acid. As plastic materials, transparent plastics conventionally known as materials for plastic lenses, such as homopolymers or copolymers with monomers that can be copolymerized, such as methyl methacrylate, styrene, diallyl phthalate, and polyol polyallyl carbonate, are used. In such a transparent plastic, which is preferably a polymer, a polymer of polyol polyallyl carbonate, particularly diethylene glycol bisallyl carbonate, is preferred in terms of transparency, strength, surface hardness, and the like.

In the present invention, the shape of the diver glasses may be arbitrary, such as circular, oval, or rectangular, and as long as they have the required dimensions as diver glasses and are plate-shaped,
There is no particular limitation, and the plate-like body is preferably flat, but may have an arc shape with a gentle curvature as a whole or a shape having an arc-shaped portion partially.

In the diver glasses of the present invention, it is important that a concave surface with a curvature that produces a lens effect is formed on the back surface of the plate-shaped body made of a transparent plastic material, that is, on the surface corresponding to the binoculars on the side of the wearing groove. . Such a concave surface corresponds to a concave lens portion as a portion having the effect of a concave lens.

The concave surface, that is, the concave lens portion is formed by grinding and polishing the binocular-corresponding portions of the back surface of the plate-shaped body. Alternatively, it is also possible to adopt a method in which a portion corresponding to the concave surface is previously formed into a concave surface during molding of the plate-like object, and the concave surface portion of the formed plate-like object is polished as a finishing process.

In either method, it is desirable that the final finish be done by polishing, for example, to give a curvature that matches the required power of the wearer.For the purpose of understanding the diver glasses of the present invention, the description will be made with reference to drawings. . 1st
The figure is a plan view of an elliptical diver glass showing an example of the diver glass of the present invention, and FIG. 2 is a cross-sectional view of the diver glass l shown in FIG. 1 along the line XY. In FIGS. 1 and 2, concave surfaces 4a and 4b with a diameter d are formed on the binocular portion of the back surface 3 of the diver glasses l by grinding and polishing, and these concave surfaces are given a curvature to produce a lens effect. Because of this, it forms a concave lens part. concave 4
If the diameter d of each of a and 4b is small, a sufficient field of view cannot be obtained and the field of view becomes narrow, which is undesirable.On the other hand, if the diameter d is large, the concave surfaces 4a and 4b will be spaced between each other, and will overlap each other. This is not preferable because it will cause a decrease in strength in this part. Therefore, it is desirable that the diameter d is in the range of 30 mm to 70 mm, and preferably in the range of 40 II11 to 60 I1 m.

It is most preferable that the center distance FD of the concave surfaces 4a and 4b as concave lens parts match the interpupillary distance of the wearer, but the average interpupillary distance for Japanese people is around 84 mm for men and 1 for women. Since it is around 56mm, 50I
It is sufficient to set it in the range of Ilffi to 70+++m.

The radius of curvature r for producing a lens effect on the concave surfaces 4a and 4b is determined by the diopter (DP) of the lens. Therefore, the radius of curvature r and the lens power (D P
) is shown by the following equation.

When the front surface is flat, DP-n-1/r When the front surface has a curvature of ro, DP-n-1/r, +1-n/r (refractive index of n-coplast) In addition, the lens The radius of curvature r of the concave lens portion of the concave surface is determined by correcting the portion center thickness tl.

The center thickness tl of the lens part is preferably 21 or more because it is necessary to maintain the strength of the diver glass. Also, the thickness of the diver glass 1, that is, the thickness tl of the part other than the concave lens part, is the thickness of the diver glass 1. Taking into account the necessity of formation and ensuring the central thickness tl of the part, the thickness is at least 3 mm+, preferably in the range of 5 to 7 mm.

In forming the concave surface in the diver glasses of the present invention, the interpupillary distance and power settings as described above depend on the interpupillary distance and visual acuity of the wearer. It is most preferable to grind and polish the parts corresponding to both eyes to make diver glasses that completely match the requirements of the wearer.
! Diver glasses with various hole distances and power settings are manufactured in advance, and the diver glasses closest to the wearer's conditions are selected according to the wearer's requirements, and finally the diver glasses that meet the wearer's conditions are selected. It is also possible to use a finishing method such as polishing to match. Naturally, if the wearer's visual acuity is different between the left and right eyes, the radius of curvature r is changed appropriately depending on the left and right eyesight to form a concave surface.

In the diver glass of the present invention, the plastic plate-like body can be easily made into a colored diver glass by dyeing with a dye or by adding a dye to the process of molding the plate-like body. Such colored diver glasses are extremely useful for fashion.

[Function] The diver glasses of the present invention can be adapted to myopia because of the formation of a concave surface on the plastic plate, that is,
This is because the concave lens portion can be easily formed by grinding and polishing. In particular, it can be processed to suit the wearer's conditions and can be finished with extremely high precision, so the lens effect can be sufficiently enhanced.

Example E] Diameter 180 mm made of diethylene glycol bisallyl carbonate polymer, width 100 m layer, thickness 5 mm
On the back surface of the elliptical plate, the interpupillary distance DP is 84 mm, the concave diameter d is 525 m, and the concave lens power (D P)
The radius of curvature r corresponding to -3,00 diopters is
1 [Grinding and polishing were performed to 15,880 mm to obtain a die-hard class for close relatives on which a concave lens was formed. The center thickness of the concave lens portion of this lens was approximately 3.0 mm.

The thus obtained diver glass is replaced with a commercially available tempered glass diver glass and installed.
I could clearly see the edge of the pool 25m underwater.

Next, we conducted a wearing test in a swimming pool with nearsighted people who wear glasses with a daily lens power of -3.0 O diopters.As a result, an unprecedented bright field was obtained, images were clear, and underwater activities were extremely easy. It was reported that it was easy and comfortable.

[Effects of the Invention] The diver glasses of the present invention are formed with a concave lens part that could not be obtained with conventional diver glasses, and have a lens effect. This has the effect of making it possible to see things clearly in perspective. Therefore, work in water or under the sea is facilitated and safety is greatly improved. It also has the effect of allowing nearsighted people to fully enjoy the scenery and enjoy comfortable swimming when swimming in or under the sea.Furthermore, the plate-shaped body can be dyed, improving fashionability. It is also expected to have the effect of increasing

[Brief explanation of the drawing]

FIG. 1 is a plan view of oval diver glasses showing an example of the diver glasses for close relatives of the present invention, and FIG.
In figure 0, which is a cross-sectional view taken along X-Y of the diver glass, 1 is the diver glass, 2 is the front surface, 3 is the back surface, 4a and 4b are concave surfaces, d is the concave diameter, tl is the lens thickness, and t2 represents the center thickness of the lens portion, and r represents the radius of curvature. 4a Misunderstanding l Figure? figure

Claims (1)

[Claims] 1. Diver glasses of any shape for myopia, characterized in that the diver glasses are made of a plastic plate and have a concave surface with a curvature that produces a lens effect on the back surface corresponding to the binoculars. diver glasses.