TW202402229A - Optical power detection system and method - Google Patents

Abstract

An optical power detection system and method for solving the problem of inconvenience in carrying. The method includes: acquiring a visual unit which includes a first barrel and a second barrel, wherein the first and second barrels are telescopically connected to and communicates with each other; viewing a first lens and a second lens which are, respectively, mounted on the first barrel and second barrel and both have a positive lens power, and then changing a focus distance by extending or contracting the first and second barrels until the visual acuity is between 1.0 and 1.5; and substituting the focus distance into a vergence formula for calculation and thereby obtaining an optical power. In this way, a user can measure their nearsightedness or farsightedness anytime, anywhere.

Description

Eye diopter detection system and method

The present invention relates to an eye refractive index detection system and method. In particular, the invention uses two lenses to overlap and change the focusing distance so that the intersection point of the light entering the eye can fall on the retina. The above focusing distance is then substituted into the vergence formula to calculate, and it is obtained Myopia or hyperopia.

In the modern era, ever-changing technologies have improved the quality of human life and created a dazzling array of smart products, bringing people an extremely convenient living environment. However, in the era of advanced information and mobile phones, human vision has gradually declined. Moreover, the age group at which visual acuity declines is decreasing year by year. Therefore, the technology for eye refraction detection is continuously developing.

For example, the Republic of China Patent Announcement No. M326398 proposes a progressive optometre, which includes a base. The base is provided with a support frame, a moving unit and a power source. The moving unit and the base are connected through a slider and a sliding block. The slots are removably connected, and the mobile unit is provided with a sight mark pattern, whereby the user looks from the support frame toward the direction of the mobile unit. At this time, the mobile unit is driven by the power source to perform linear displacement, so that the The optotype pattern moves relatively away from or approaches the user through the mobile unit, thereby measuring the user's myopia or hyperopia.

However, the aforementioned progressive refractor is bulky and it is inconvenient to move the entire device. Unless the general public visits the testing center in person, it will be difficult to obtain resources for eye refractive measurement.

Therefore, in order to make eye refraction detection easier to perform, the inventor proposes an eye refraction detection method. The steps include:

Use a visual unit, the visual unit includes a first cylinder and a second cylinder, the first cylinder and the second cylinder are telescopically connected; and visually installed on the visual unit A first lens and a second lens; changing the distance between the first cylinder and the second cylinder by telescoping the first cylinder and the second cylinder, so that the eyes reach between 1.0 visual mark and 1.5 visual mark through the visual unit; at this time Through a scale mark provided between the first cylinder and the second cylinder, a focusing distance after adjusting the distance is obtained; the focusing distance is substituted into a vergence formula for calculation, thereby obtaining a diopter.

Further, the visual unit includes an optical ruler. The focus distance is read through the optical ruler between the first cylinder and the second cylinder to generate a focus distance signal. The optical ruler inputs the focus distance signal into a process. The processor is set in the visual unit, and the processor substitutes the focusing distance into the vergence formula for calculation, and finally uses a display to display the diopter.

The inventor also proposes an eye refraction detection system, including:

The visual unit includes the first cylinder and the second cylinder. The first cylinder and the second cylinder are telescopically connected; the first lens is provided on the first cylinder; Two lenses are provided on the second barrel. The second lens and the first lens have the same lens power, and the lens power is a positive number; by telescopically contracting the first barrel and the second barrel. Change the focusing distance so that the eyes reach between 1.0 visual mark and 1.5 visual mark through the adjusted first lens and the second lens, and substitute the focusing distance into the vergence formula for calculation, and obtain the diopter.

Further, the first barrel includes a first lens holder and a reducing joint, and the reducing joint includes a visual end and a telescopic end. The first lens holder is surrounded by a Teflon tape ring and then embedded in the The visual end is used to tightly fit the first lens holder and the reducing joint.

Further, the second barrel includes a second lens holder and a tube body. The tube body has two opposite ends, one end of which is fixed on the second lens holder, and the other end is embedded in the telescopic end and faces away from or closer to the visual field. The relative lengthening or shortening movement of the ends.

Further, the visual unit includes the scale mark, which is located on the tube body, whereby the focusing distance is obtained with reference to the exposed scale mark through the relative elongation or shortening movement of the tube body and the telescopic end.

Furthermore, the visual unit further includes an optical ruler, the optical ruler is arranged on the tube body, the optical ruler signal is connected to a processor, and the processor is electrically connected to a display.

The telescopic end has a first inner flange, one end of the second lens holder has a second inner flange, and the opposite ends of the tube body have a first outer flange and a second outer flange. , whereby when the focusing distance reaches the longest, the first inner flange and the first outer flange engage with each other so that the reducing joint and the pipe body are not separated; and the second inner flange and the The second outer flanges engage with each other and are adhered with an adhesive to join and fix the second lens holder to the tube body.

Wherein, the vergence formula calculates the diopter, the diopter is the difference between an imaging vergence and an object's vergence, the imaging vergence is the reciprocal of the imaging distance, and the object vergence is The reciprocal of the object distance, where the object distance is the sum of a fixed distance and the focusing distance, the fixed distance is a constant, and the focusing distance is a variable, whereby the focusing distance is substituted into the vergence formula , then multiplied by 100 to get the degree of myopia or hyperopia.

Wherein, the distance between the second cylinder and the first cylinder is shortened, so that the plurality of light rays pass through the second lens toward the first lens to form a divergent state; or, the second cylinder moves away from the first lens. The spacing is extended in the direction of the cylinder, so that the plurality of light rays pass through the second lens toward the first lens to form a convergence state.

According to the above technical characteristics, the following effects can be achieved:

1. The invention has a simple structure, is small in size and is easy to carry, effectively improving people's control over their own myopia or hyperopia.

2. The present invention uses the first lens and the second lens with the same positive lens power to adjust the distance so that the intersection point of the light after focusing on the crystal can fall on the retina, and the image can be reduced without changing the size of the image. Adjust the self-blurred state to the clear state, and then substitute the adjusted focus distance into the vergence formula calculation to achieve the effect of eye refraction detection.

3. Just prepare an image, adjust the distance through the expansion and contraction between the first cylinder and the second cylinder, and use the scale mark to calculate it yourself or directly refer to the output comparison table, or read the focus distance with an optical ruler. Then the processor performs calculations and displays the results on the monitor, and you can immediately know the degree of myopia or hyperopia.

4. Through the low friction characteristics of Teflon, use Teflon tape to ring the periphery of the first lens holder and then embed the reducing joint, which effectively protects the first lens holder and the reducing joint from damage during joining, and can also achieve tightness. Cooperation purpose.

5. Since the first lens is smaller than the second lens, the first lens and the second lens can be connected concentrically through the reducing joint.

6. By inserting the tube into the telescopic end, the first cylinder and the second cylinder can be easily moved relative to each other to extend or shorten.

7. The first inner flange is engaged with the first outer flange, and the second inner flange is engaged with the second outer flange, thereby preventing the first cylinder and the second cylinder from being separated from each other.

8. Set the second lens on the second lens holder and maintain a protective distance from the outlet of the second lens, thereby protecting the second lens from damage or contamination.

Based on the above technical features, the main functions of the eye refraction detection system and method of the present invention will be clearly demonstrated in the following embodiments.

Please refer to the first figure first, which illustrates a three-dimensional appearance of an embodiment of the present invention. The eye diopter detection system of the present invention includes a visual unit 1. The visual unit 1 includes a first cylinder 11 and a second cylinder 12. The first cylinder 11 and the second cylinder 12 are retractable. Connected to the ground. Among them, the first barrel 11 includes a first lens holder 111 and a reducing joint 112, and the reducing joint 112 includes a visual end A and a telescopic end B. The first lens holder 111 is provided with a The first lens 1111 is an eyepiece, and is wrapped with a Teflon tape 1112 around the periphery of the first lens holder 111 and then embedded in the viewing end A, so that the first lens holder 111 and The reducing joint 112 achieves a tight-fitting connection; the second cylinder 12 includes a second lens holder 121 and a tube body 122. The second lens holder 121 is provided with a second lens 1211. The lens 1211 is an objective lens, and the second lens 1211 and the first lens 1111 have the same positive lens power, which is 10 diopters. The tube body 122 is provided with a scale mark S, and the tube body 122 is provided with a scale mark S. One end of the body 122 is fixed to the second lens holder 121 , and the other end is embedded in the telescopic end B.

Continuing the above description and referring to the second figure, a side view of an embodiment of the present invention is disclosed, in which the tube body 122 can be further provided with an optical scale R. Please refer to the third figure, the third figure A and the fourth figure. It is a schematic diagram showing the side view of the operation and the block diagram of the system configuration. The visual unit 1 is viewed through an eye 2. The first lens 1111 and the second lens 1211 are both convex lenses, and the first lens 1111 is smaller than the second lens 1211, so the eye 2 is close to the first lens 1111 and looks in the direction of the second lens 1211. By moving the telescopic end B or the tube body 122, the tube The body 122 moves relatively elongated or shortened in the direction away from or close to the visual end A until the eye 2 reaches between 1.0 visual mark and 1.5 visual mark, and then the optical ruler R transmits a focus distance signal dg. to a processor E, which uses a vergence formula to perform calculations, and finally displays the detection results through a display P.

During this period, since the telescopic end B has a first inner flange 1121 and the second lens holder 121 has a second inner flange 1212, with the first outer flange at one of the two opposite ends of the tube body 122, Flange 1221 and a second outer flange 1222; the first inner flange 1121 and the first outer flange 1221 engage with each other, so when the tube 122 elongates and moves in the direction away from the viewing end A When the pipe body 122 is not separated from the reducing joint 112; the second lens holder 121 is engaged with the second outer flange 1222 through the second inner flange 1212, and is bonded with an adhesive The second lens holder 121 and the tube body 122 are joined and fixed by adhesive bonding.

In addition, the second lens 1211 maintains a protective distance from an outlet C of the second lens holder 121. The protective distance avoids the threat of damage or contamination of the second lens 1211; and the iron fluoride The Teflon tape 1112 has the characteristics of smoothness and low friction. Therefore, after the first lens holder 111 is wrapped around the periphery with the Teflon tape 1112, it is embedded in the viewing end A and tightly matches the reducing joint 112. During the connection, the first lens holder 111 or the different-meridian joint 112 will not be damaged.

Please refer to the fifth figure, which is a schematic diagram showing the operation of the refraction detection method performed by the eye refraction detection system of the present invention. First, maintain a viewing distance D3 of 6 meters between the visual unit 1 and an image F, and look from the eye 2 to the first lens 1111 and then to the second lens 1211, and then through the The exit C looks at the image F again, by telescopically adjusting a focusing distance d between the tube body 122 and the reducing joint 112, and reading the focusing distance d with the aforementioned optical ruler R. The aforementioned focus distance signal dg is generated, and until the eye 2 reaches between 1.0 and 1.5 visual marks, the aforementioned focus distance signal dg will be input to the aforementioned processor E, and the processor E will substitute the focus distance d into the The above-mentioned vergence formula is used for calculation to obtain a degree of myopia or a degree of hyperopia, and then the detection result is displayed on the aforementioned display P.

In addition, the focusing distance d can also be obtained from the scale mark S, and then the focusing distance d can be directly substituted into the vergence formula to calculate the myopia degree or the hyperopia degree by oneself; or, the user can use the The focusing distance d is manually input to the processor E using an input device, and is calculated by the processor E, and finally the myopia degree or the hyperopia degree is obtained.

The vergence formula: .

P is a diopter; V is an imaging vergence; U is an object vergence; the diopter multiplied by 100 is the myopia degree or the hyperopia degree.

Among them, the imaging vergence is the reciprocal of an imaging distance; the object vergence is the reciprocal of an object distance, and the object distance .

D1 is the length of the first barrel 12; D2 is the length of the second lens holder 121; D3 is the viewing distance; d is the focusing distance.

Wherein, the imaging distance, the length D1 of the first barrel 12, the length D2 of the second lens holder 121, and the viewing distance D3 are all a fixed distance, and the fixed distance is a constant; The focusing distance d is a variable.

Continuing the above description and referring to Figures 6 to 9, when the eye 2 looks at the image F through the visual unit 1, the plurality of light rays 3 go from the second lens 1211 to the first lens 1111. The direction enters an eyeball 21 and generates a ray intersection 31 through a lens 22 . Without changing the size of the aforementioned image F, the first lens 1111 and the second lens 1211 of the present invention have the same lens power of 10 diopters, effectively causing the light intersection 31 to fall on a retina 23, and the aforementioned figure can be Image F is adjusted from the blurred state to the clear state to achieve the effect of performing eye refraction detection.

When the plurality of light rays 3 are directed from the second lens 1211 to the first lens 1111 and form a horizontal state, they enter the crystalline lens 22 , and the intersection point 31 of the light rays falls in front of the retina 23 (as shown in the sixth figure) ), at this time, by adjusting the aforementioned focusing distance d, the second lens 1211 can be shortened in a direction closer to the first lens 1111, and the plurality of light rays 3 form a divergent state through the first lens 1111, and then Enter the crystalline lens 22 and make the light intersection point 31 fall on the retina 23 (as shown in the seventh figure). At this time, the eye reaches between 1.0 and 1.5 optotypes, and the focusing distance d is substituted into The vergence formula is then multiplied by 100 to obtain the myopia degree.

If the plurality of light rays 3 are directed from the second lens 1211 to the first lens 1111, enter the crystalline lens 22 after forming a horizontal state, and the intersection point 31 of the light rays falls behind the retina 23 (as shown in the eighth Figure), at this time, as long as the second lens 1211 is extended in a direction away from the first lens 1111 by adjusting the aforementioned focusing distance d, and the plurality of light rays 3 form a convergence state through the first lens 1111, Then enter the crystalline lens 22 and make the light intersection point 31 fall on the retina 23 (as shown in the ninth figure). At this time, the eye reaches between 1.0 and 1.5 optotypes, and the focusing distance d is After substituting into the vergence formula and multiplying by 100, the hyperopia degree is obtained.

In addition, you can also measure different focusing distances d through the scale mark S, then directly substitute it into the vergence formula to calculate by yourself, and then list the comparison table; or, measure through the scale mark S After changing the focusing distance d, manually input the focusing distance d to the processor E through the input device, and then output the calculation results in the comparison table; or read different values through the optical ruler R. The focusing distance d is generated to generate different focusing distance signals dg, and then the optical scale R transmits the focusing distance signal dg to the processor E, and the different focusing distance signals dg are generated through the processor E. The focusing distance d is substituted into the vergence formula for calculation, and a comparison table is listed, and the comparison table is output; when the eye diopter is detected next time, the value corresponding to the comparison table can be found through the focusing distance d. , you can immediately know the degree of myopia or the degree of hyperopia. The comparison table is shown in Table 1. Table 1: Focus distance d shortened (cm) Myopia (degrees) Focus distance d elongation (cm) Farsightedness (degrees) 20.00 0 20.00 0 19.52 -50 20.53 +50 19.09 -100 21.11 +100 18.70 -150 21.76 +150 18.33 -200 22.50 +200 18.00 -250 23.33 +250 17.69 -300 24.29 +300 17.40 -350 25.38 +350 17.14 -400 26.67 +400 16.90 -450 28.18 +450 16.67 -500 30.00 +500

The embodiment of the present invention is compared with two conventional eye refraction detection instruments, which are an open-field computer refractometer and a retinoscopy retinoscopy refractometer. As shown in Table 2, 40 samples are used for statistics. From the experimental results, it can be seen from Table 2 that the difference between the present invention and the two conventional eye refraction detection instruments is less than 0.5%, which shows the accuracy of the present invention, and the present invention is more portable than the conventional technology. advantages. Table 2: Statistics Project Embodiments of the invention Open field computerized optometry machine Retinoscopy optometry machine average 0.5250 0.5278 0.5208 95% lower limit of average 0.3992 0.3988 0.3878 upper limit of confidence interval 0.6508 0.6567 0.6537 Mode 1.0000 1.0000 1.0000 standard deviation 0.3932 0.4031 0.4157 Variation number 0.1550 0.1630 0.1730 Scope 1.0000 1.0000 1.0000 minimum value 0.0000 0.0000 0.0000 maximum value 1.0000 1.0000 1.0000

Based on the description of the above embodiments, the operation, use and effects of the present invention can be fully understood. However, the above embodiments are only preferred embodiments of the present invention and should not be used to limit the implementation of the present invention. The scope, that is, simple equivalent changes and modifications based on the patent scope of the present invention and the description of the invention, are all within the scope of the present invention.

1: Visual unit 11:First cylinder 111:First mirror holder 1111:First lens 1112:Teflon tape 112: Reducing joint 1121: First inner flange 12:Second cylinder 121:Second mirror holder 1211:Second lens 1212:Second inner flange 122:Tube body 1221: First outer flange 1222:Second outer flange 2:eyes 21:eyeball 22:Crystal 23:Retina 3:Light 31: Ray intersection point A:Visual end B: Telescopic end C:Export D1: length of the first cylinder D2: Length of the second mirror holder D3: viewing distance d: focus distance dg: focus distance signal E:processor F:image P:monitor R: Optical ruler S: scale mark

[The first figure] is a three-dimensional view of the eye diopter detection system according to an embodiment of the present invention, without an optical ruler.

[The second figure] is a side view of an eye diopter detection system according to an embodiment of the present invention, with an optical ruler installed.

[The third figure] is a schematic diagram of the operation of the eye diopter detection system in a side view according to the embodiment of the present invention.

[Figure A] is a system configuration block diagram of the eye refraction detection system according to the embodiment of the present invention.

[Figure 4] is a schematic diagram 2 of the operation of the eye refraction detection system in side view according to the embodiment of the present invention.

[The fifth figure] is an operation schematic diagram of the embodiment of the present invention.

[Figure 6] Figure 1A shows the relationship between light, eyeball, first lens and second lens. The light is focused in front of the retina.

[Figure 7] is Figure 1B of the relationship between light, eyeball, first lens and second lens. Light is focused on the retina.

[Figure 8] Figure 2A shows the relationship between light, eyeball, first lens and second lens. The light is focused behind the retina.

[Figure 9] Figure 2B shows the relationship between light, eyeball, first lens and second lens. The light is focused on the retina.

1: Visual unit

11:First cylinder

111:First mirror holder

1111:First lens

112: Reducing joint

12:Second cylinder

121:Second mirror holder

1211:Second lens

122:Tube body

2:eyes

C:Export

D1: length of the first cylinder

D2: Length of the second mirror holder

D3: viewing distance

d: focus distance

F:image

Claims (10)

An eye refraction detection method, the steps include: Using a visual unit, the visual unit includes a first cylinder and a second cylinder, the first cylinder and the second cylinder are telescopically connected; And visually observe a first lens and a second lens installed on the viewing unit with eyes; By extending and contracting the first cylinder and the second cylinder, the distance is changed so that the eyes reach between 1.0 visual mark and 1.5 visual mark through the visual unit; At this time, a focusing distance after adjusting the distance is obtained through a scale mark provided between the first cylinder and the second cylinder; Substituting the focusing distance into a vergence formula is calculated to obtain a diopter. The eye refraction detection method according to claim 1, wherein the visual unit further includes an optical ruler, and the focusing distance is read through the optical ruler between the first cylinder and the second cylinder to generate a focusing distance. The optical ruler inputs the focusing distance signal into a processor, which is set in the visual unit, and the processor substitutes the focusing distance into the vergence formula for calculation, and finally uses a display to display the diopter. An eye refraction detection system that performs the eye refraction detection method described in claim 1, including: The visual unit includes the first cylinder and the second cylinder, and the first cylinder and the second cylinder are telescopically connected; The first lens is arranged on the first barrel; The second lens is arranged on the second barrel, the second lens and the first lens have the same lens power, and the lens power is a positive number; The focusing distance is changed by extending and contracting the first cylinder and the second cylinder, so that the eyes can reach between 1.0 visual mark and 1.5 visual mark through the adjusted first lens and the second lens, and Substituting the focusing distance into the vergence formula is calculated to obtain the diopter. The eye diopter detection system as described in claim 3, wherein the first barrel includes a first lens base and a reducing joint, and the reducing joint includes a visual end and a telescopic end, and the first lens base A Teflon tape ring is used to cover the periphery and then be embedded in the viewing end, thereby tightly fitting the first lens holder and the reducing joint. The eye refraction detection system according to claim 4, wherein the second barrel includes a second lens base and a tube body, the tube body has two opposite ends, one end of which is fixed to the second lens base, and the other end Then it is embedded in the telescopic end and moves relatively elongated or shortened in a direction away from or close to the visual end. The eye diopter detection system as described in claim 4 or claim 5, wherein the visual unit further includes the scale mark, which is located on the tube body, whereby the tube body and the telescopic end are relatively extended or shortened. movement, and obtain the focusing distance by referring to the exposed scale mark. The eye refraction detection system as described in claim 5, wherein the visual unit further includes an optical ruler, the optical ruler is arranged on the tube body, the optical ruler signal is connected to a processor, and the processor is electrically connected to a display . The eye diopter detection system as claimed in claim 4 or claim 5, wherein the telescopic end has a first inner flange, and one end of the second lens base has a second inner flange, and the opposite end of the tube body Both ends have a first outer flange and a second outer flange, whereby when the focusing distance reaches the longest, the first inner flange and the first outer flange engage with each other, so that the reducing joint It is not separated from the tube body; and the second inner flange and the second outer flange are engaged with each other and adhered with an adhesive so that the second lens holder and the tube body are joined and fixed. The eye diopter detection system as described in claim 3, wherein the vergence formula is to calculate the diopter, the diopter is the difference between an imaging vergence and an object vergence, and the imaging vergence is The reciprocal of the imaging distance, the object vergence is the reciprocal of the object distance, where the object distance is the sum of a fixed distance and the focusing distance, the fixed distance is a constant, the focusing distance is a variable, whereby , after substituting the focusing distance into the vergence formula, and then multiplying by 100, the myopia degree or the hyperopia degree can be obtained. The eye diopter detection system according to claim 3, wherein the second cylinder shortens the distance in a direction closer to the first cylinder, so that the plurality of light rays pass through the second lens toward the first lens to form a divergent state; Alternatively, the second barrel is elongated in a direction away from the first barrel, so that the plurality of light rays pass through the second lens toward the first lens to form a convergence state.

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