CN209417455U - Alvarez zoom intelligent glasses - Google Patents

Abstract

The utility model discloses a kind of Alvarez zoom intelligent glasses；The utility model includes mirror holder and eyeglass；The eyeglass of every side is all made of an Alvarez free surface lens group, and an Alvarez free surface lens group is made of two lens；Each lens are fixed on the guide rail of mirror holder by sliding block, wherein one or two in two lens can be free to slide on the guide rail of mirror holder；It realizes according to the distance of wearer's object observing and automatically adjusts focal power, enable a user to the state observation target with the most comfortable, alleviate the fatigue of eye muscle, for eyesight user normal for teenager, can achieve pre- myopic-preventing purpose；For the elderly's patients with presbyopia, it can be convenient patients with presbyopia and can while clearly see distant place and target nearby clearly.

Description

Alvarez zoom smart glasses

technical field

The utility model relates to a kind of smart glasses, which can automatically adjust the optical power of the glasses according to the distance of the wearer to observe the target, so that the eyes of the wearer can observe the target in the most comfortable state, and can be used to prevent myopia and It is convenient for elderly people with presbyopia to wear.

Background technique

The National Health and Medical Commission revealed at a special press conference on June 4, 2018 that the number of people with myopia in my country has exceeded 450 million, and the onset of myopia presents a trend of early age, rapid progression, and deep degree. Among them, the incidence of myopia among primary school students is about 30%, and that of college students is about 90%. Near-sightedness is considered to be the first risk factor affecting the development of myopia. At present, more and more electronic products have entered people's lives. Adolescence is a critical period for the development of refractive status, and it is also a period of heavy learning. Teenagers have poor self-control ability in using electronic products, resulting in an increasing proportion of young people with myopia. Myopia is getting younger and younger.

In my country, presbyopia is a common phenomenon. Presbyopia is closely related to age, and usually begins to appear around the age of 45 and deepens year by year. According to recent one-to-one survey data on residents over 50 years old in Shanghai , Beijing, Guangzhou, Hangzhou , Nanjing and other places, 80% of people over 50 years old are affected by presbyopia, and the proportion in Shanghai and Nanjing is as high as nearly 90%. What is even more worrying is that the presbyopic population in our country is gradually becoming younger. The natural lens of the eye is like a machine, it may age naturally due to the increase of years of use, or it may accelerate aging due to excessive use. In modern society, people are highly dependent on various electronic devices such as computers, mobile phones, and TVs. At the same time, the pressure of life and work is increasing. People generally use their eyes excessively and are in a state of visual fatigue for a long time. Therefore, it is more likely to cause the crystal elasticity to weaken rapidly and cause the onset of presbyopia. Age keeps advancing.

Patients with presbyopia need to use progressive multi-focal lenses or multiple pairs of glasses alternately to meet different visual needs. Some presbyopia patients may have a pair of reading glasses, a pair of computer glasses, a pair of outdoor glasses, and a pair of driving glasses at the same time, and what is even more likely to be equipped with a complete set of glasses in different places such as home and work . It is conceivable , will bring great trouble to normal life.

Aiming at the current problems of myopia in teenagers and presbyopia in the elderly, the smart zoom glasses proposed in this proposal can prevent the myopia of teenagers and facilitate the use of presbyopia in the elderly (with smart zoom glasses, both distant and near objects can be seen very clearly ), has a simple device, is easy to carry, and has very important significance.

Contents of the invention

The utility model aims at the deficiencies of the prior art, and proposes a kind of Alvarez zoom smart glasses.

The utility model relates to Alvarez zoom smart glasses, comprising a frame and lenses; the lenses on each side are composed of an Alvarez free-form lens group, and an Alvarez free-form lens group is composed of two lenses; each lens is fixed on the On the guide rail of the mirror frame, one or both of the two lenses can slide freely on the guide rail of the mirror frame;

The polynomial equation of Alvarez freeform surface lens is:

Among them, z is the surface height of two polynomials, A is the polynomial coefficient, and f(x, y) is a high-order polynomial. f(x,y)=b ₁ xy ⁴ +b ₂ x ³ y ² +b ₃ x ⁵ +b ₄ xy ⁶ +b ₅ x ³ y ⁴ +b ₆ x ⁵ y ² +b ₇ x ⁷ +… where , b ₁ , b ₂ , b ₃ , ... are high-order polynomial coefficients.

The resulting focal length is:

Among them, δ is the combined focal power of two Alvarez lenses, A is a polynomial coefficient, 2δ is the relative moving distance between two Alvarez lenses, and n is the material refractive index of Alvarez lenses.

The two sides of the front of the mirror frame are respectively provided with a distance sensor, and the distance sensor is connected to the control circuit module; the control circuit module is connected to the drive motor, and the drive motor drives the slider to slide through the drive screw pair .

As preferably, the polynomial surfaces of two Alvarez lenses in the described Alvarez free-form surface lens are positioned at two adjacent surfaces, and the front surface is plane, spherical or aspheric, and the last surface is plane, spherical or aspheric; Working When the outer lens is fixed, the inner lens moves in a direction perpendicular to the optical axis; or the inner lens is fixed, and the outer lens moves in a direction perpendicular to the optical axis; or both inner and outer lenses can move in a direction perpendicular to the optical axis .

As preferably, the polynomial surfaces of the two Alvarez lenses in the described Alvarez free-form surface lens are located at the front and the last two surfaces, and the two adjacent surfaces in the middle are plane, spherical or spherical aspheric surfaces; during work, the outer lens is not fixed Move, the inner lens moves along the direction perpendicular to the optical axis; or the inner lens is fixed, the outer lens can move along the direction perpendicular to the optical axis; or both the inner and outer lenses can move along the direction perpendicular to the optical axis.

As preferably, the four surfaces of the two Alvarez lenses in the Alvarez lens group in the described Alvarez free-form surface lens are all polynomial surfaces; during work, the outer lens is fixed, and the inner lens moves along a direction perpendicular to the optical axis; or the inner lens The lens is fixed, and the outer lens can move along the direction perpendicular to the optical axis; or both the inner and outer lenses can move along the direction perpendicular to the optical axis.

The utility model has the following advantages: the optical power can be automatically adjusted according to the distance of the wearer observing the target, so that the user can observe the target in the most comfortable state, relieve the fatigue of the eye muscles, and is suitable for teenagers with normal eyesight. It is said that the purpose of preventing myopia can be achieved; for elderly presbyopia patients, it is convenient for presbyopia patients to clearly see distant and near targets at the same time.

Description of drawings

Figure 1 Structural diagram of smart zoom glasses.

Figure 2(a) is a schematic diagram of an Alvarez zoom lens group with a polynomial free-form surface located on an adjacent surface when the focal power is 0;

Figure 2(b) is a schematic diagram of the Alvarez zoom lens group whose focal power is a positive polynomial free-form surface located on the adjacent surface;

Figure 2(c) is a schematic diagram of the Alvarez zoom lens group in which the polynomial free-form surface is located on the adjacent surface when the focal power is negative;

Figure 3(a) is a schematic diagram of the Alvarez zoom lens group with polynomial free-form surfaces located at the front and the last two surfaces when the focal power is 0;

Fig. 3 (b) is the schematic diagram of the Alvarez zoom lens group whose focal power is the polynomial free-form surface located at the front and the last two surfaces;

Figure 3(c) is a schematic diagram of the Alvarez zoom lens group in which the polynomial free-form surface is located at the front and the last two surfaces when the focal power is negative;

Figure 4(a) is a schematic diagram of the Alvarez zoom lens group composed of 4 polynomial free-form surfaces when the focal power is 0;

Fig. 4 (b) is the schematic diagram of the Alvarez zoom lens group composed of 4 polynomial free-form surfaces when the focal power is positive;

Figure 4(c) is a schematic diagram of the Alvarez zoom lens group composed of 4 polynomial free-form surfaces when the focal power is negative;

Figure 5. The outer lens is fixed, the inner lens moves along the direction perpendicular to the optical axis, and the polynomial free-form surface is located on the two adjacent surfaces of the inner and outer lenses.

Figure 6. The inner lens is fixed, the outer lens moves along the direction perpendicular to the optical axis, and the polynomial free-form surface is located on the two adjacent surfaces of the inner and outer lenses.

Figure 7. The outer lens is fixed, the inner lens can move along the direction perpendicular to the optical axis, and the polynomial free-form surface is located at the front and back of the two surfaces.

Figure 8 is the working mode in which the inner lens is fixed, the outer lens moves along the direction perpendicular to the optical axis, and the polynomial free-form surface is located at the front and the back.

Figure 9. Both the inner and outer lenses can move along the direction perpendicular to the optical axis, and the polynomial free-form surface is located on the two adjacent surfaces of the inner and outer lenses.

Figure 10. Both the inner and outer lenses can move along the direction perpendicular to the optical axis, and the working mode of the two surfaces where the polynomial free-form surface is located at the front and the back.

Figure 11 The outer lens is fixed, the inner lens can move along the direction perpendicular to the optical axis, and the four surfaces of the lens are all polynomial free-form surfaces.

Fig. 12 The inner lens is fixed, the outer lens can move along the direction perpendicular to the optical axis, and the four surfaces of the lens are all polynomial free-form surfaces.

Figure 13 Both the inner and outer lenses can move along the direction perpendicular to the optical axis, and the four surfaces of the lens are all polynomial free-form surfaces in the working mode.

Figure 14 Working principle of smart glasses.

Detailed ways

A kind of Alvarez zoom smart glasses as shown in Figure 1, comprises spectacle frame and eyeglass; The eyeglass of each side is all made of an Alvarez free-form surface lens group 4, and an Alvarez free-form surface lens group is made up of two lenses; The block is fixed on the sliding groove 2 of the mirror frame, and one or both of the two lenses can slide freely on the guide rail of the mirror frame; the left side of the front of the mirror frame is provided with a first sensor 1, the mirror The third sensor 5 is arranged on the right side of the front of the frame, and the second sensor 3 is arranged in the middle of the front of the frame, and the distance sensor is connected with the control circuit module; the control circuit module 13 is connected with the first drive motor 7, the second drive The motor 1 is connected, and the two drive motors drive the slider to slide through the first thread pair 10 and the second thread pair 12 . The drive motor and the control circuit are powered by the battery module 6; the Alvgrez zoom smart glasses are also provided with two indicator lights, which are used to display the state of the power and the focal length of the glasses respectively;

The polynomial equation of Alvarez freeform surface lens is:

Among them, z is the surface height of two polynomials, A is the polynomial coefficient, and f(x, y) is a high-order polynomial. f(x,y)=b ₁ xy ⁴ +b ₂ x ³ y ² +b ₃ x ⁵ +b ₄ xy ⁶ +b ₅ x ³ y ⁴ +b ₆ x ⁵ y ² +b ₇ x ⁷ +… where , b ₁ , b ₂ , b ₃ , ... are high-order polynomial coefficients.

The resulting focal length is:

Among them, δ is the combined focal power of two Alvarez lenses, A is a polynomial coefficient, 2δ is the relative moving distance between two Alvarez lenses, and n is the material refractive index of Alvarez lenses.

As shown in Fig. 2, Fig. 5, Fig. 6, and Fig. 9, the polynomial surfaces of the two Alvarez lenses in the described Alvarez free-form surface lens are positioned at two adjacent surfaces, and the frontmost surface is a plane, a spherical surface or an aspheric surface, The final surface is flat, spherical or aspherical; in operation, the outer lens is fixed and the inner lens moves perpendicular to the optical axis; or the inner lens is fixed and the outer lens moves perpendicular to the optical axis; or Both the inner and outer lenses can move along the direction perpendicular to the optical axis.

As shown in Fig. 3, Fig. 7, Fig. 8, and Fig. 10, the polynomial surfaces of the two Alvarez lenses in the described Alvarez free-form surface lens are located at the front and the last two surfaces, and the two adjacent surfaces in the middle are planes and spherical surfaces Or spherical aspheric surface; when working, the outer lens is fixed, and the inner lens moves along the direction perpendicular to the optical axis; or the inner lens is fixed, and the outer lens can move along the direction perpendicular to the optical axis; Movement in a direction perpendicular to the optical axis.

As shown in Fig. 4, Fig. 11, Fig. 12, and Fig. 13, the four surfaces of the two Alvarez lenses in the Alvarez lens group in the described Alvarez free-form surface lens are all polynomial surfaces; The lens moves along the direction perpendicular to the optical axis; or the inner lens is fixed, and the outer lens can move along the direction perpendicular to the optical axis; or both the inner and outer lenses can move along the direction perpendicular to the optical axis.

As shown in Figure 14(a), when the human eye observes distant objects, the distant objects are imaged on the retina of the eyeball, and light stimulates the nerves on the retina to generate nerve impulses and transmit them to the cerebral cortex along the optic nerve fibers to produce visual perception.

When looking at a nearby object, as shown in Figure 14(b), if the state of the human eye remains unchanged when looking at a distant object, the image formed by the nearby object will be projected to the rear of the retina of the human eye. In order to see nearby objects clearly, the ciliary muscle of the human eye will be tightened, which will shorten the focal length of the human eye, and at the same time, the extraocular muscles of the human eye will elongate the human eyeball in the direction of the optical axis (that is, the image distance increases ), through the adjustment of the muscles of the human eye, nearby objects can also be imaged on the retina. If the human eye works at close range for a long time, the ciliary muscle and extraocular muscles will spasm, and they cannot return to the relaxed position, resulting in myopia. The working principle of our utility model smart zoom glasses is that when human eyes observe distant objects (as shown in Fig. The focal power of the zoom lens group is 0, and the human eye works in a normal state (the state of seeing distant objects without wearing glasses, and the eye muscles are in a relaxed state). mobile phone screen), the displacement sensor on the smart glasses detects the distance between the object and the human eye at this time, controls the active Alvarez lens to move to a suitable position, and makes the focal power of the zoom lens group negative (such as -300 degrees). At this time, the human eye can still see the nearby target clearly in the state of observing the distant object, and the muscles of the human eye step are in a relaxed state (as shown in Figure 14(d)). Smart zoom glasses can make the human eye always work in the state of eye muscle relaxation, so as to prevent and avoid the myopia caused by the eyes working for a long time to see objects at close range, especially the myopia of young students.

Assuming that the focal length of the human eye is 22.8mm, the normal distance (comfortable distance) from the front surface of the cornea to the retina is 23-24mm. When the human eye observes an object at a distance of more than 350mm, the human eye works in a comfortable state. When the human eye observes an object at a distance of 150mm, the distance between the imaging surface of the object and the front surface of the human cornea is 26.4mm. If you do not wear glasses, The muscles of the human eye must adjust the focal length and imaging working distance of the eye. Working in this state for a long time will cause myopia.

Suppose the coefficient A=5.0E-4 (1/mm ² ) of the two polynomial freeform surfaces of the Alvarez lens, the material of the lens is PMMA (refractive index 1.5), and the aperture is 20mm, as shown in Figure 2, As shown by formula (2), when the second Alvarez lens moves down 2mm relative to the first Alvarez lens, the focal length of the Alvarez lens group is:

The corresponding diopter is +100 degrees.

When the second Alvarez lens moves up 2mm relative to the first Alvarez lens, the focal length of the Alvarez lens group is:

The corresponding diopter is -100 degrees.

When a user wearing smart glasses observes a close-up object (such as when reading a book), the distance sensor on the smart glasses detects that the object is 200mm away from the human eye, and the control circuit on the smart glasses drives the active Alvarez according to this detection distance. The lens moves down 4.4mm, producing 220 degrees of optical power, so that close objects are still imaged at a comfortable distance of 24mm for the human eye. In order to avoid the muscle tension and spasm of the human eye when looking at close-up objects, and cause myopia.

When the second Alvarez lens moves down 4.4mm relative to the first Alvarez lens, the focal length of the Alvarez lens group is:

The corresponding diopter is 220 degrees.

Claims (8)

1.Alvarez zoom intelligent glasses, it is characterised in that: including mirror holder and eyeglass；The eyeglass of every side is all by an Alvarez Free surface lens group is constituted, and an Alvarez free surface lens group is made of two lens；Each lens are solid by sliding block It is scheduled on the guide rail of mirror holder, wherein one or two in two lens can be free to slide on the guide rail of mirror holder；

Alvarez free surface lens polynomial equation are as follows:

Wherein, z is two polynomial surface height, and A is multinomial coefficient, and f (x, y) is higher order polynomial；

F (x, y)=b₁xy⁴+b₂x³y²+b₃x⁵+b₄xy⁶+b₅x³y⁴+b₆x⁵y²+b₇x⁷+…

Wherein, b₁,b₂,b₃... it is higher order polynomial coefficient；

Generate focal length are as follows:

Wherein, δ is two Alvarez lens combination focal powers, and A is multinomial coefficient, and 2 δ are between two Alvarez lens The distance of relative movement, n are the Refractive Index of Material of Alvarez lens.

2. Alvarez zoom intelligent glasses according to claim 1, it is characterised in that: the mirror holder front two sides point Not She You a range sensor, the range sensor connect with control circuit module；The control circuit module with Driving motor connection, the driving motor drive sliding block sliding by driving screw thread pair.

3. Alvarez zoom intelligent glasses according to claim 1 or 2, it is characterised in that: the Alvarez is free The polynomial surface of two Alvarez lens is located at two adjacent surfaces in curve lens, and the surface of foremost is plane, ball Perhaps aspherical last surface is plane, spherical surface or aspherical in face.

4. Alvarez zoom intelligent glasses according to claim 1 or 2, it is characterised in that: the Alvarez is free The polynomial surface of two Alvarez lens is located at most preceding and last two surfaces in curve lens, adjacent two in centre Surface is plane, and spherical surface or spherical surface are aspherical.

5. Alvarez zoom intelligent glasses according to claim 1 or 2, it is characterised in that: the Alvarez is free Four surfaces of two Alvarez lens are polynomial surface in Alvarez lens group in curve lens.

6. Alvarez zoom intelligent glasses according to claim 3, it is characterised in that: outer lens are fixed, interior len It is moved along the direction perpendicular to optical axis；Or interior len is fixed, outer lens are moved along the direction perpendicular to optical axis；Or it is inside and outside Mirror can be moved along the direction perpendicular to optical axis.

7. Alvarez zoom intelligent glasses according to claim 4, it is characterised in that: outer lens are fixed, interior len It is moved along the direction perpendicular to optical axis；Or interior len is fixed, outer lens can be moved along the direction perpendicular to optical axis；Or it is inside and outside Lens can be moved along the direction perpendicular to optical axis.

8. Alvarez zoom intelligent glasses according to claim 5, it is characterised in that: outer lens are fixed, interior len It is moved along the direction perpendicular to optical axis；Or interior len is fixed, outer lens can be moved along the direction perpendicular to optical axis；Or it is inside and outside Lens can be moved along the direction perpendicular to optical axis.