WO2021012543A1

WO2021012543A1 - Anti-fatigue glasses and manufacturing method therefor

Info

Publication number: WO2021012543A1
Application number: PCT/CN2019/120465
Authority: WO
Inventors: 乐孜纯; 董文
Original assignee: 浙江工业大学
Priority date: 2019-07-19
Filing date: 2019-11-25
Publication date: 2021-01-28

Abstract

Anti-fatigue glasses, comprising glasses substrates (2) and a glasses frame (3). The glasses substrates (2) are fixed on the glasses frame (3). The anti-fatigue glasses further comprise light ray direction adjustment lenses (1) fixed on the glasses substrates (2). Optical centers of the light ray direction adjustment lenses (1) coincide with those of the glasses substrates (2). The light ray direction adjustment lenses (1) are used for deflecting incident light rays, such that the light rays enter a human eye in the form of approximately parallel light. The glasses can adjust eye positions and train eye muscles without interrupting normal use of eyes, so as to prevent eyeballs from being in a stationary refractive state for a long time and prevent eye muscles from being in a stationary stretching state for a long time, thereby implementing an anti-fatigue effect during use of eyes by training eye balls and eye muscles. Also provided is a manufacturing method for anti-fatigue glasses.

Description

Anti-fatigue glasses and manufacturing method thereof

Technical field

The invention relates to the field of optometry, in particular to a new type of glasses used for adjusting eye muscles to achieve the purpose of alleviating eye fatigue and a manufacturing method thereof.

Background technique

With the rapid popularity of personal computers, tablets, mobile phones and other electronic products in work and entertainment, the number of people who use eyes and the amount of eyes used have increased exponentially, and the eye fatigue phenomenon that follows has also become prominent. Long-term eye fatigue cannot be relieved, and it is easy to cause eye diseases such as refractive errors (myopia or hyperopia), amblyopia, and strabismus; or cause eye discomfort such as dry eyes and astringent eyes. At present, eye fatigue is common in all people who use eyes, but it has a particularly great impact on young people whose eyes are in the process of development. Screening data show that in recent years, the incidence of adolescent refractive errors in my country has continued to soar, with the highest rate of myopia in high school, exceeding 80%. Therefore, the development of technologies and products that can relieve eye fatigue is very necessary for all eye users.

At present, the existing technologies and methods to relieve eye fatigue include: (1) do eye exercises regularly; (2) use eye massagers, such as an existing technology "anti-eye fatigue massager (CN 106361555 A)", Its effect is similar to doing eye exercises; (3) Use medicinal preparations to relieve eye fatigue, such as "eye drops to relieve eye fatigue (CN 109512945 A)". The above methods (1) and (2) are physical methods, without the aid of drugs, work and study must be interrupted during use; method (3) requires long-term intake of pharmaceutical preparations, which inevitably have side effects. The technical method closest to the present invention is "a kind of bionic glasses to avoid eye fatigue (CN 103142348 A)", which uses electronic control to cover one eye regularly, the blinded eye is forced to rest, and the other eye works monocularly . However, it is normal for the human eyes to see things at the same time to obtain stereo vision and realize the real perception of the external world. Therefore, this method and glasses are not only inconsistent with the normal use of human eyes, and long-term wearing will inevitably affect human eyes Normal functioning of vision and related optic nervous system.

In summary, the existing technologies all have defects and deficiencies such as long-term drug intake; or must work with one eye, which deviates from the normal state of eye use; or must interrupt work or study during use. Therefore, it is urgent to research new technologies and products to meet the urgent needs of eye-users to prevent eye fatigue.

Summary of the invention

In order to overcome the shortcomings and shortcomings of the prior art, the present invention provides anti-fatigue glasses and a manufacturing method thereof, which can adjust the eye position and train the eye muscles without interrupting the normal use of the eyes (that is, seeing both eyes at the same time). The eyeball is in a fixed refractive state for a long time, while preventing the eye muscle from being in a fixed stretched state for a long time, and the anti-fatigue effect is achieved by training the eyeball and eye muscle while using the eye; and the present invention is a pure physical The technical method does not involve the intake of any pharmaceutical preparations.

The technical solutions adopted by the present invention to solve its technical problems are:

An anti-fatigue spectacles, comprising a spectacle base and a spectacle frame, the eye base is fixed on the spectacle frame, the anti-fatigue spectacles further include a light direction adjusting lens for realizing an anti-fatigue function, the light direction adjusting lens , Used to deflect the incident light so that it enters the human eye with approximately parallel light; the light direction adjustment lens is composed of an array of microprisms, in the array of microprisms, each microprism unit constituting the array is The same; the light direction adjusting lens is fixed on the glasses substrate, and the optical center of the light direction adjusting lens coincides with the optical center of the glasses substrate.

In the present invention, the optical center refers to the position where the line of sight passes through the lens when both eyes are looking squarely at the target; the choice of the spectacle frame must meet the wearer's interpupillary distance requirement, which is the same as the optical center distance of the left and right spectacle lenses.

Further, the structure of the microprism unit is represented by the length L of the base and the angle a between the hypotenuse and the base. The refractive index of the air and the refractive index of the array microprism material are represented by n ₁ and n ₂ respectively, The light passing through the array microprism enters the human eye at an angle b, and the angle b refers to the angle between the light and the y axis.

Preferably, the angle a and the angle b satisfy formula (1):

The value range of the angle b is 0.1° to 6°;

The value of the base length L satisfies formula (2):

e ^{-α·L tanα} ＞85% (2)

In formula (2), α represents the absorption coefficient of the array microlens material.

Furthermore, the edges of the array microprisms are perpendicular to the line connecting the optical centers of the left and right eyes.

The material of the light direction adjusting lens is an optical plastic with good optical performance in the visible light band, including but not limited to polymethyl methacrylate (PMMA) or polycarbonate (PC).

Still further, the glasses substrate is a plano lens, a concave lens or a convex lens. It includes the following three situations: (1) For users without refractive errors, choose a flat lens as the base; (2) For users with myopia, choose a concave lens as the base. The refractive power of the concave lens is consistent with that of the user. The refractive power of the myopia glasses lenses used is the same; (3) For users suffering from hyperopia, a convex lens is selected as the base, and the refractive power of the convex lens is the same as the refractive power of the hyperopia glasses lens the user is using.

The side of the light direction adjusting lens with the array microprisms facing the glasses substrate, and the optical center of the light direction adjusting lens is aligned with the optical center of the glasses substrate and then fixed and assembled. During the fixed assembly, the left and right eyes are separately aligned and fixed assembling the light direction adjustment lens and the glasses base. The fixed assembly methods include but are not limited to mechanical methods (such as welding), chemical methods (such as bonding), and the like.

A method for manufacturing anti-fatigue glasses. The anti-fatigue eye includes a glasses base, a spectacle frame, and a light direction adjusting lens for achieving an anti-fatigue function. The eye base is fixed on the spectacle frame, and the light direction is adjusted The lens is used to deflect the incident light so that it enters the human eye as a parallel light; the light direction adjusting lens is fixed on the glasses substrate, and the optical center of the light direction adjusting lens and the glasses The optical centers of the substrate overlap, and the manufacturing method includes the following steps:

1) Making a light direction adjusting lens, the light direction adjusting lens is composed of an array microprism, in the array microprism, each microprism unit constituting the array is the same;

2) The side of the light direction adjusting lens with the array microprisms facing the glasses substrate, the optical center of the light direction adjusting lens is aligned with the optical center of the glasses substrate, and then the fixed assembly is performed;

3) After the light direction adjusting lens and the glasses substrate are fixed, mark the optical center position at the edge of the glasses substrate, cut it for the left and right eyes, and grind;

4). When the cut and edging lens is put into the glasses frame, the interpupillary distance is measured and calibrated, and at the same time, it is ensured that the light deflection angles of the left and right eyes are equal and the directions are opposite.

Further, the fixing assembly method is a mechanical method or a chemical method.

Furthermore, in the step 3), the cutting is based on the coincidence of the optical center and the pupil position, and after the cutting is completed, an edging process is performed.

The technical idea of the present invention is: using microstructure optical devices to deflect light, present the objects near the photopic distance seen by the eyes at approximately infinity, and realize the refractive state of the eyeball and the pulling of the eye muscles. The adjustment of the state of extension plays the role of regular relaxation and exercise of the eye muscles and eyeballs.

The proposed anti-fatigue glasses are based on purely physical methods, do not involve the intake of drugs, are convenient to wear or take off, and do not need to stop work during use, that is, the eye muscles and eyeballs can be relaxed and exercised while using the eyes. Achieve anti-fatigue effect.

The beneficial effects of the present invention are mainly manifested in: 1. Invent a new type of anti-fatigue glasses, which can be used under the eye state without interruption of work; 2. Based on the principle of deflection of light by microstructure optical devices, it belongs to a purely physical method. It does not involve the intake of drugs; 3. An anti-fatigue eyeglasses have a simple structure, and the core component of the light direction adjustment lens can be integrated and mass-produced; 4. Small size, light weight, good firmness, and convenient to carry and use.

Description of the drawings

Fig. 1 is a schematic diagram of the structure of an anti-fatigue eyeglasses of the present invention, where 1 represents the light direction adjusting lens, 2 represents the eyeglass substrate, and 3 represents the eyeglass frame.

Figure 2 is a structural diagram of a lens for adjusting the direction of light in anti-fatigue glasses of the present invention, where x and y represent the horizontal and vertical axes of the coordinate system, L is the length of the base of the microprism unit, and a is the hypotenuse of the microprism and The included angle of the bottom side, n ₁ and n ₂ respectively represent the refractive index of air and the refractive index of the array microprism material, the angle b represents the angle between the light passing through the array microprism and the y-axis, (a) is a schematic diagram of the overall structure, (b) is a cross-sectional view of the whole, (c) is a schematic diagram of the microprism unit.

Detailed ways

The present invention will be further described below in conjunction with the drawings.

1 and 2, a kind of anti-fatigue glasses, including a glasses base 2 and a glasses frame 3, the eye base 2 is fixed on the glasses frame 3, the anti-fatigue glasses also include anti-fatigue function The light direction adjusting lens 1, the light direction adjusting lens 1, is used to deflect the incident light so that it enters the human eye in an approximate parallel light; the light direction adjusting lens 3 is composed of an array microprism, the In the array microprism, each microprism unit constituting the array is the same; the light direction adjusting lens 1 is fixed on the glasses substrate 2, and the optical center of the light direction adjusting lens 1 is the same as the glasses substrate 2. The optical centers coincide.

Further, the structure of the microprism unit is represented by the length L of the base and the angle a between the hypotenuse and the base (x-axis), and the refractive index of the air and the refractive index of the array microprism material are respectively n ₁ and n ₂ indicates that the light passing through the array microprism enters the human eye at an angle b, and the angle b refers to the angle between the light and the y axis (see Figure 2).

The angle a and the angle b satisfy the formula (1):

The value range of the angle b is 0.1° to 6°;

The value of the base length L satisfies formula (2):

e ^{-α·L tanα} ＞85% (2)

The edge of the array microprism is perpendicular to the line connecting the optical centers of the left and right eyes.

The material of the light direction adjusting lens is selected from optical plastics with good optical performance in the visible light band, including but not limited to polymethylmethacrylate (PMMA), polycarbonate (PC), and the like.

Furthermore, the glasses substrate includes the following three situations: (1) For users without refractive errors, choose a flat lens as the substrate; (2) For users with myopia, choose a concave lens as the substrate , The refractive power of the concave lens is the same as the refractive power of the myopia glasses lens the user is using; (3) For users with hyperopia, choose a convex lens as the base, and the refractive power of the convex lens is the same as the refractive power of the hyperopia glasses lens the user is using the same.

The side of the light direction adjusting lens with the array microprisms facing the glasses substrate, and after the optical center of the light direction adjusting lens is aligned with the optical center of the glasses substrate, a fixed assembly is performed. During the fixed assembly, the alignment and fixed assembly of the light direction adjustment lens and the glasses base are performed separately for the left and right eyes. The fixed assembly methods include but are not limited to mechanical methods (such as welding), chemical methods (such as bonding), and the like.

In this embodiment, after the light direction adjusting lens and the glasses base are fixed, the optical center position is marked on the edge of the glasses base, and the left and right eyes are cut. The cutting is based on the coincidence of the optical center and the pupil position. After the cutting is completed, an edge grinding process is performed, and then the glasses frame is installed. When the cut and edging lens is installed in the glasses frame, the interpupillary distance is measured and calibrated, and at the same time, it is ensured that the light deflection angles of the left and right eyes are equal and the directions are opposite.

The anti-fatigue glasses proposed in this embodiment are based on a purely physical method and do not involve the ingestion of drugs. They are easy to switch between wearing and taking off, and there is no need to stop work during use, that is, the eye muscles and eyeballs can be relaxed while using the eyes. And exercise to achieve anti-fatigue effect.

A method for manufacturing anti-fatigue glasses. The anti-fatigue glasses comprise a glasses base 2 and a glasses frame 3. The eye base 2 is fixed on the glasses frame 3, and the anti-fatigue glasses also include a function for achieving anti-fatigue The light direction adjusting lens 1 is used to deflect the incident light so that it enters the human eye in a manner similar to parallel light; the light direction adjusting lens 1 is fixed on the glasses substrate 2, the optical center of the light direction adjusting lens 1 coincides with the optical center of the glasses substrate 2. The manufacturing method includes the following steps:

Further, in the step 1), the structure of the microprism unit is represented by the base length L and the angle a between the hypotenuse and the base, and the refractive index of the air and the refractive index of the array microprism material are respectively used n ₁ and n ₂ indicate that the light passing through the array microprism enters the human eye at an angle b, and the angle b refers to the angle between the light and the y axis.

Preferably, the angle a and the angle b satisfy formula (1):

The value range of the angle b is 0.1° to 6°;

The value of the base length L satisfies formula (2):

e ^{-α·L tanα} ＞85% (2)

In the step 2), during the fixed assembly, the alignment and fixed assembly of the light direction adjustment lens and the spectacle base are performed separately for the left and right eyes. The fixed assembly methods include but are not limited to mechanical methods (such as welding), chemical methods (such as bonding), and the like.

In the step 3), the cutting is based on the coincidence of the optical center and the pupil position. After the cutting is completed, an edging process is performed, and then the glasses frame is installed.

The method of using the anti-fatigue glasses of this embodiment includes the following steps:

(1) For users who have no obvious eye diseases and do not usually wear glasses:

(1) Choose suitable anti-fatigue glasses according to the size of interpupillary distance;

(2) Use anti-fatigue glasses when the eyes are used for more than 60 minutes;

(3) Use anti-fatigue glasses no less than 2 times and no more than 10 times a day, and each use time is 10 minutes to 30 minutes.

(2) For users who suffer from myopia or hyperopia, who wear glasses at ordinary times:

(1) Customize suitable anti-fatigue glasses according to the size of the pupil distance and the refractive power of the left and right eyes;

(2) Use anti-fatigue glasses when the eyes are used for more than 60 minutes, and take off myopia or hyperopia glasses when using them, in exchange for the invention anti-fatigue glasses;

Claims

An anti-fatigue glasses, comprising a glasses base and a glasses frame, the eye base is fixed on the glasses frame, characterized in that the anti-fatigue glasses further comprise a light direction adjusting lens for realizing the anti-fatigue function, the The light direction adjusting lens is used to deflect the incident light so that it enters the human eye in a manner similar to parallel light; the light direction adjusting lens is composed of array microprisms, and each of the array microprisms constitutes the array The microprism units are all the same; the light direction adjusting lens is fixed on the glasses substrate, and the optical center of the light direction adjusting lens coincides with the optical center of the glasses substrate.
The anti-fatigue glasses of claim 1, wherein the structure of the microprism unit is represented by the length L of the base and the angle a between the hypotenuse and the base, the refractive index of the air and the array The refractive index of the microprism material is denoted by n 1 and n 2 respectively. The light passing through the array microprism enters the human eye at an angle b, which refers to the angle between the light and the y axis.
The anti-fatigue glasses according to claim 2, wherein the angle a and the angle b satisfy the formula (1):

The value range of the angle b is 0.1° to 6°;

The value of the base length L satisfies formula (2):

e -α·L tan a ＞85% (2)

In formula (2), α represents the absorption coefficient of the array microlens material.
The anti-fatigue glasses of claim 2, wherein the edges of the array microprisms are perpendicular to the line connecting the optical centers of the left and right eyes.
The anti-fatigue glasses according to any one of claims 1 to 4, wherein the material of the light direction adjusting lens is methyl methacrylate or polycarbonate.
The anti-fatigue glasses according to any one of claims 1 to 4, wherein the glasses substrate is a plano lens, a concave lens or a convex lens.
The anti-fatigue glasses according to any one of claims 2 to 4, wherein the side of the light direction adjusting lens on which the array microprisms is made faces the glasses substrate, and the light direction adjusting lens is The center is aligned with the optical center of the glasses substrate and then fixed and assembled.
A method for manufacturing anti-fatigue glasses according to claim 1, wherein the anti-fatigue eye comprises a glasses base, a spectacle frame, and a light direction adjusting lens used to realize an anti-fatigue function, and the eye base Fixed on the glasses frame, the light direction adjusting lens is used to deflect the incident light so that it enters the human eye in an approximate parallel light; the light direction adjusting lens is fixed on the glasses substrate, the The optical center of the ray direction adjusting lens coincides with the optical center of the glasses substrate, and the manufacturing method includes the following steps:

1) Making a light direction adjusting lens, the light direction adjusting lens is composed of an array microprism, in the array microprism, each microprism unit constituting the array is the same;

2) The side of the light direction adjusting lens with the array microprisms facing the glasses substrate, the optical center of the light direction adjusting lens is aligned with the optical center of the glasses substrate, and then the fixed assembly is performed;

3) After the light direction adjusting lens and the glasses substrate are fixed, mark the optical center position at the edge of the glasses substrate, cut it for the left and right eyes, and grind;

4). When the cut and edging lens is put into the glasses frame, the interpupillary distance is measured and calibrated, and at the same time, it is ensured that the light deflection angles of the left and right eyes are equal and the directions are opposite.
8. The method for manufacturing anti-fatigue glasses according to claim 7, wherein the fixing assembly method is a mechanical method or a chemical method.
The method for manufacturing anti-fatigue glasses according to claim 7 or 8, wherein in step 3), the cutting is based on the coincidence of the optical center and the pupil position, and after the cutting is completed, edging is performed .