CN111610645A - Intelligent presbyopic glasses of single-face lens group horizontal migration formula of zooming - Google Patents
Intelligent presbyopic glasses of single-face lens group horizontal migration formula of zooming Download PDFInfo
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- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
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- G02C7/061—Spectacle lenses with progressively varying focal power
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- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
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Abstract
A single-face lens group horizontal movement zooming type intelligent presbyopic glasses comprises a single-face free-form surface zooming lens module, an intelligent zooming control system, an intelligent display screen system, an intelligent touch control system, a circuit control system and a glasses frame; the single-sided free-form surface zoom lens module comprises two groups of completely same single-sided zoom lens groups, each group of single-sided zoom lens groups comprises two single-sided zoom lenses, each single-sided zoom lens is composed of a surface which is a plane and a surface which is a free-form surface, and the length of one single-sided zoom lens is longer than that of the other single-sided zoom lens in the two single-sided zoom lenses in the group; the invention provides a pair of progressive multifocal spectacles for presbyopia, presbyopia and emmetropia people with certain age, and the pair of progressive multifocal spectacles is inconvenient to mount after presbyopia comes, the group is unwilling to accept the traditional presbyopia glasses to solve the presbyopia problem, the single presbyopia glasses are easy to expose the age of a wearer when being worn, the two presbyopia glasses are unwilling to wear due to the jump image problem and appearance problem of the two presbyopia glasses, and the progressive multifocal spectacles greatly limit the wide application of the progressive multifocal presbyopia glasses in design level and cost.
Description
Technical Field
The invention belongs to the technical field of intelligent glasses, and particularly relates to a horizontal-moving zooming type intelligent presbyopic glasses with a single-lens set.
Background
The term "presbyopia" refers to a condition in which an elderly person gradually makes reading or working at a close distance difficult. This is a phenomenon of aging of human body functions. People can feel that fine handwriting is blurred by eyes in the age of 40-45, and the handwriting can be seen only by taking a mobile phone, a book and newspaper far away. Presbyopia is a physiological normal phenomenon of the human body and is a sign of the body's onset of aging. With age, the lens of the eye hardens and thickens, and the accommodative capacity of the eye muscles diminishes, resulting in a reduction in zoom capacity. Therefore, when looking at a near object, the object looking at the near distance becomes blurred because the image cannot be completely focused when projected on the retina. Even with care to protect the eyes, the degree of eye presbyopia increases with age. If the presbyopia does not wear the glasses, even if the presbyopia does not read the near target clearly, various eye fatigue phenomena such as headache, tight eyebrow, eye pain, blurred vision and other eye fatigue symptoms can be generated due to forcible adjustment and over contraction of ciliary muscle.
The traditional presbyopic glasses mainly comprise three types, namely a single-lens, a double-lens and a progressive multi-focus lens; the single-lens can only be used for looking near, the glasses need to be taken off when looking far, and the presbyopic glasses need to be continuously replaced along with the increase of presbyopic degrees, so that inconvenience and economic cost in life are brought to middle-aged and elderly people; the double-lens is that the upper half lens is used for seeing far and the lower half lens is used for seeing near, but the presbyopic glasses have jumping phenomenon when the upper half lens and the lower half lens are switched to see objects, and the appearance is not beautiful; the progressive multi-focus lens can meet the requirements of objects at different distances from far to middle, but has some non-negligible defects; first, the initial wearer has a longer adaptation time. Generally, an adaptation period of about one month is needed, but the adaptation period varies from person to person and is easy to cause dizziness during walking. Secondly, due to the fact that astigmatism disordered areas are arranged on the two sides of the lens, objects cannot be seen clearly when the objects on the two sides are seen through the optical eyeball, and the objects can be seen clearly only by rotating the neck and the eyeball at the same time; thirdly, when going downstairs, the glasses need to be worn lower, and can be seen from a far-used area above the glasses as much as possible, otherwise, the glasses are difficult to see and have a clear view; fourthly, the lens with a large visual field, a wide zooming channel and a large zooming range is difficult to design, and the defect of dead zones at two sides can not be broken through all the time; fifth, progressive addition lenses are expensive and are difficult for the average middle-aged and elderly to bear.
Disclosure of Invention
The invention aims to provide a single-lens-group horizontally-moving zooming type intelligent presbyopic glasses, which solves the problem that presbyopic glasses are inconvenient to fit after people with myopia, presbyopia and emmetropia reach a certain age in an intelligent zooming mode, people who do not want to accept the traditional presbyopic glasses to solve the presbyopic problem, the age of a wearer is easily exposed when the single-lens presbyopic glasses are worn, the middle-aged and old people do not want to wear the single-lens presbyopic glasses due to the jumping image problem and the appearance problem of the double-lens, and the progressive multifocal glasses greatly limit the wide application of the progressive multifocal glasses in the presbyopic population in the aspects of defects of a design level and cost.
The intelligent presbyopic glasses solve various problems of the traditional presbyopic glasses to a great extent on the overall appearance, the optical design and the visual experience.
The technical scheme of the invention is that a single-face lens group horizontal movement zooming type intelligent presbyopic glasses comprises a single-face free-form surface zooming lens module, an intelligent zooming control system, an intelligent display screen system, an intelligent touch control system, a circuit control system and a glasses frame; the intelligent zoom control system and the circuit control system are respectively installed inside the mirror bracket, the intelligent display screen system is installed on the inner side face of the upper end of the mirror bracket, and the intelligent touch control system is installed on two mirror legs of the mirror bracket.
The single-side free-form surface zoom lens module comprises two identical single-side zoom lens groups, each single-side zoom lens group comprises two single-side zoom lenses, each single-side zoom lens is composed of a plane surface and a free-form surface, and the length of one single-side zoom lens is longer than that of the other single-side zoom lens in the two single-side zoom lenses in the group.
Two single-side zoom lenses of one of the single-side zoom lens groups are respectively defined as a first lens and a second lens; and the two single-sided zoom lenses of the other one of the single-sided zoom lens groups are respectively defined as a third lens and a fourth lens.
The free-form surface zoom surface of the single-sided zoom lens comprises two optical vertexes, namely a free-form surface highest point and a free-form surface lowest point; and the highest point of the free curved surface is arranged to the lowest point of the free curved surface in a wave-like change.
The first lens and the second lens form a group, the planes of the first lens and the second lens are adjacent and opposite, and a gap of 0.2mm is reserved between the first lens and the second lens; the highest point of the free-form surface zoom surface of the first lens and the lowest point of the free-form surface zoom surface of the second lens are arranged in the same direction; the lowest point of the free-form surface zoom surface of the first lens and the highest point of the free-form surface zoom surface of the second lens are arranged in the same direction; and the first lens is longer than the second lens and the third lens is longer than the fourth lens.
Similarly, the third lens and the fourth lens form another group, the planes of the third lens and the fourth lens are adjacently opposite, and a gap of 0.2mm is left between the third lens and the fourth lens; the highest point of the free-form surface zoom surface of the third lens and the lowest point of the free-form surface zoom surface of the fourth lens are arranged in the same direction, and the lowest point of the free-form surface zoom surface of the third lens and the highest point of the free-form surface zoom surface of the fourth lens are arranged in the same direction.
The first lens and the third lens are mirror axial symmetry about the central axis; the second lens and the fourth lens are in mirror symmetry about the midpoint of the middle surface.
The single-side zoom lens comprises a point P, a zone C, a point N and a zone A, wherein the point P is an optical central point corresponding to the maximum positive power, namely a position corresponding to the highest point of the free-form surface; the N point is an optical central point corresponding to the maximum negative degree, namely the position corresponding to the lowest point of the free curved surface; the area C is a continuous zooming channel, and is a transition area from the maximum positive degree of the point P to the maximum negative degree of the point N, namely a transition area of a connecting line between the highest point of the free-form surface and the lowest point of the free-form surface; the area A is a peripheral astigmatic area, i.e., an area outside the highest point of the free-form surface, the lowest point of the free-form surface, and a transition area between the highest point of the free-form surface and the lowest point of the free-form surface.
The ratio of the thickness of the highest point of the free-form surface zoom surface, the thickness of the lowest point of the free-form surface zoom surface and the distance between the highest point and the lowest point of the free-form surface zoom surface ranges from 10:0.5:50 to 20:1.8: 120.
The diopter range of the highest point of the free curved surface of the single-side variable-focus lens is +2.50D to +5.00D, and the diopter range of the lowest point of the free curved surface of the single-side variable-focus lens is-2.50D to-5.00D.
The diopter range of the single-sided zoom lens group consisting of the two single-sided zoom lenses is +5.00D to-5.00D linear zooming.
The second lens is connected with the first motor through a transmission mechanism for transmission, so that the second lens can move horizontally left and right, and the first lens is fixedly arranged on the spectacle frame.
The fourth lens is connected with the motor through a transmission mechanism for transmission, so that the left and right translation movement of the fourth lens is realized; and the third lens is fixedly mounted to the frame.
The intelligent zoom control system comprises a motor I, a motor II, two encoders and a control circuit board provided with a chip; the encoder of one of the encoders is connected with the second lens, the other encoder is connected with the fourth lens, the second lens is connected with the motor through the transmission mechanism for transmission, and the fourth lens is connected with the second motor through the transmission mechanism for transmission; the second lens and the fourth lens move independently and do not influence each other.
The encoder is electrically connected with the control circuit board.
The intelligent display screen system comprises a display, and the display is mounted on the inner side surface of the upper end of the mirror bracket.
The intelligent touch control system mainly comprises four intelligent touch switches, namely a left outer side surface touch switch, a left upper side surface touch switch, a right outer side surface touch switch and a right upper side surface touch switch; the left outer side surface touch switch and the left upper side surface touch switch are respectively connected with the second lens and fixedly arranged on the glasses legs on the left side of the glasses frame; and the right outer side surface touch switch and the right upper side surface touch switch are respectively connected with the fourth lens and fixedly installed on the glasses legs on the right side of the glasses frame.
The left outer side surface touch switch controls the second lens to move to the left side (temporal side), and the left upper side surface touch switch controls the second lens to move to the right side (nasal side).
And the right outer side surface touch switch controls the fourth lens to move to the right side (temporal side), and the right upper side surface touch switch controls the fourth lens to move to the left side (nasal side).
The circuit control system comprises a circuit board for controlling movement, a Micro Control Unit (MCU), a circuit transmission system, a power supply system and a sensor system.
The technical effects of the invention are as follows: compared with the prior art, the intelligent zoom lens has the advantage that the problem that the glasses are inconvenient to fit after presbyopia of a certain age is reached for the myopia, hypermetropia and emmetropia people in an intelligent zoom mode. This group of people is reluctant to accept the traditional presbyopic glasses to solve the presbyopic problem, and wearing of the single-piece presbyopic glasses is easy to expose the age of the wearer. The problem of image skipping and appearance of the bifocals make the middle and old aged people unwilling to wear. Progressive addition lenses, both at the design level and cost, have greatly limited their widespread use in presbyopic populations.
Drawings
The following detailed description is further detailed in conjunction with the accompanying drawings and the detailed description.
Fig. 1 is a front view of a single-sided zoom lens.
Fig. 2 is a side view of fig. 1.
Fig. 3 is a perspective view of fig. 1.
FIG. 4 is a schematic diagram of a single-sided free-form variable focus lens module.
FIG. 5 is a schematic diagram of the maximum point coincidence of the free-form surfaces of the single-sided variable focal length lens assembly shown in FIG. 4.
Fig. 6 is a front side view of a presbyopic lens of the present invention.
Fig. 7 is a perspective view of fig. 6.
In the figure, 1, a first lens; 2. a second lens; 3. a third lens; 4. a fourth lens; 5. the highest point; 6. the left outer side surface is provided with a touch switch; 7. the upper left side surface touches the switch; 8. the right outer side surface is provided with a touch switch; 9. the upper right side is provided with a touch switch; 10. a lowest point; 11. a region C; 12. a region A; 13. a first motor; 14. a second motor; 15. a display.
F. A single-sided zoom lens; f01, free-form surface zooming surface; f02, plane.
Detailed Description
The following is a further description with reference to the drawings and the examples.
A single-face lens group horizontal movement zooming type intelligent presbyopic glasses comprises a single-face free-form surface zooming lens module, an intelligent zooming control system, an intelligent display screen system, an intelligent touch control system, a circuit control system and a glasses frame; the intelligent zoom control system and the circuit control system are respectively installed inside the mirror bracket, the intelligent display screen system is installed on the upper end face of the mirror bracket, and the intelligent touch control system is installed on two mirror legs of the mirror bracket.
As shown in fig. 2 and 4, the single-sided free-form-surface zoom lens module includes two identical single-sided zoom lens groups, each single-sided zoom lens group includes two single-sided zoom lenses, each single-sided zoom lens F is composed of a plane F02 on one surface and a free-form-surface F01 on the other surface, and the length of one single-sided zoom lens is longer than that of the other single-sided zoom lens in the two single-sided zoom lenses F in the group.
Two single-side zoom lenses F in one of the single-side zoom lens groups are respectively defined as a first lens 1 and a second lens 2; the two single-sided zoom lenses of the other one of the single-sided zoom lens groups are respectively defined as a third lens 3 and a fourth lens 4.
The free-form surface zoom surface of the single-sided zoom lens comprises two optical vertexes, namely a free-form surface highest point 5 and a free-form surface lowest point 10; the highest point 5 of the free-form surface is arranged to the lowest point 10 of the free-form surface in a wave-like change mode, and a C area 11 is formed; the free-form surface zooming surface F01 comprises a peak structure and a valley structure in the vertical direction (Y axis), wherein the highest point of the peak is the highest point 5 of the free-form surface, and the lowest point of the valley is the lowest point 10 of the free-form surface; the distance from the highest point 5 of the free-form surface variable focal plane F01 to the plane F02 is 3.25mm, and the distance from the lowest point 10 of the free-form surface variable focal plane F01 to the plane F02 is 0.25 mm.
As shown in fig. 4, the first lens 1 and the second lens 2 form a group, and the respective planes F02 of the first lens 1 and the second lens 2 are adjacently opposite and have a gap of 0.2mm in between; the highest point of the free-form surface zoom surface of the first lens 1 and the lowest point of the free-form surface zoom surface of the second lens 2 are arranged in the same direction; the lowest point of the free-form surface zooming surface of the first lens 1 and the highest point of the free-form surface zooming surface of the second lens 2 are arranged in the same direction.
Similarly, as shown in fig. 4, the third lens 3 and the fourth lens 4 form another group, and the respective planes of the third lens 3 and the fourth lens 4 are adjacently opposite, with a 0.2mm gap left therebetween; the highest point of the free-form surface zoom surface of the third lens 3 and the lowest point of the free-form surface zoom surface of the fourth lens 4 are arranged in the same direction, and the lowest point of the free-form surface zoom surface of the third lens 3 and the highest point of the free-form surface zoom surface of the fourth lens 4 are arranged in the same direction.
The first lens 1 and the third lens 3 are mirror axial symmetry about the central axis; the second lens 2 and the 4 th lens 4 are in mirror symmetry about the midpoint of the middle surface.
As shown in fig. 1, the single-sided zoom lens F includes a point P, a zone C, a point N, and a zone a, where the point P is an optical center point corresponding to the maximum positive power, that is, the point P is a position corresponding to the highest point 5 of the free-form surface; the N point is an optical central point corresponding to the maximum negative power, namely the N point is a position corresponding to the lowest point 10 of the free-form surface; the C area 11 is a continuous zooming channel and is a transition area from the maximum positive degree of a point P to the maximum negative degree of a point N, namely a transition area of a connecting line between the highest point 5 of the free-form surface and the lowest point 10 of the free-form surface; the area a 12 is a peripheral astigmatic area, i.e., an area other than the highest point of the free-form surface, the lowest point of the free-form surface, and a transition area between the highest point of the free-form surface and the lowest point of the free-form surface.
The refractive index change rate calculation formula of the continuous zooming C zone 11 is as follows:
＝(DP-DN)/L，
wherein DPDiopter representing the highest point, DNRepresenting the diopter of the nadir. L represents the distance from the highest point to the lowest point.
The ratio of the thickness of the highest point 5 of the free-form surface zooming surface F01, the thickness of the lowest point 10 of the free-form surface zooming surface F01 and the distance between the highest point 5 and the lowest point 10 of the free-form surface zooming surface F01 is 10:0.5: 50-20: 1.8: 120.
The range of 5 diopters of the highest point of the free curved surface of the single-side variable-focus lens F is +2.50D to +5.00D, and the range of 10 diopters of the lowest point of the free curved surface of the single-side variable-focus lens F is-2.50D to-5.00D.
The diopter range of the single-sided zoom lens group consisting of the two single-sided zoom lenses is +5.00D to-5.00D linear zooming.
The range of 5 diopters of the highest point of the free curved surface of the single-side variable-focus lens F is +2.50D to +5.00D, and the range of 10 diopters of the lowest point of the free curved surface of the single-side variable-focus lens F is-2.50D to-5.00D.
The diopter range of the single-sided zoom lens group consisting of the two single-sided zoom lenses is +5.00D to-5.00D linear zooming.
The second lens 2 is connected with the first motor 13 through a transmission mechanism for transmission, so that the second lens 2 can move horizontally left and right, the first lens 1 is fixedly installed on the spectacle frame, and when the second lens 2 moves left and right, the first lens 1 is fixed.
The fourth lens 4 is connected with the second motor 14 through a transmission mechanism for transmission, so that the left-right translational movement of the fourth lens 4 is realized; the third lens 3 is fixedly arranged on the frame, and when the fourth lens 4 moves left and right, the third lens 3 is fixed.
The two groups of single-sided zoom lens groups respectively control the second lens 2 and the fourth lens 4 to perform left-right translational motion through a first motor 13 and a second motor 14, and when the highest point of the free curved surface of the second lens 2 moves towards the direction of the highest point of the free curved surface of the first lens 1, the overlapping area of the two lenses shows a positive power increasing trend and moves to the extreme end with the largest positive power; when the lowest point of the free-form surface of the second lens 2 moves towards the lowest point of the free-form surface of the first lens 1, the overlapping area of the two lenses shows a negative power increasing trend and moves to the extreme end with the maximum negative power.
The two groups of single-sided zoom lens groups respectively control the second lens 2 and the fourth lens 4 to perform left-right translational motion through a first motor 13 and a second motor 14, and when the highest point of a free curved surface of the fourth lens 4 moves towards the direction of the highest point of a free curved surface of the third lens 3, the overlapping area of the two lenses shows a positive power increasing trend and moves to the extreme end with the largest positive power; when the lowest point of the free-form surface of the fourth lens 4 moves towards the lowest point of the free-form surface of the third lens 3, the overlapping area of the two lenses shows a negative power increasing trend and moves to the extreme end with the maximum negative power.
In the process of the left-right translational motion of the two groups of single-sided zoom lenses respectively and independently, the actual zoom amount is controlled by controlling the operation step length of the first motor 13 or the second motor 14; however, the actions of the second lens 2 and the fourth lens 4 are independent and do not affect each other.
The intelligent zoom control system comprises a first motor 13, a second motor 14, two encoders (not shown in the figure) and a control circuit board provided with a chip; the encoder and the control circuit board are respectively arranged in the spectacle frame; the encoder of one of the two is connected with the second lens 2, the other encoder is connected with the fourth lens 4, the second lens 2 is connected with the first motor 13 through a transmission mechanism for transmission, and the fourth lens 4 is connected with the second motor 14 through the transmission mechanism for transmission; the second lens 2 and the fourth lens 4 are each moved independently.
The encoder is electrically connected with the control circuit board.
The intelligent display screen system comprises a display, wherein the display screen in the display respectively displays diopters of an overlapping area of a first lens 1 and a second lens 2 and an overlapping area of a third lens 3 and a fourth lens 4; the diopter is converted from the distance moved in the motion control unit encoder, and the minimum recognition movement length of the encoder is 0.1mm, corresponding to diopter of 0.10D, i.e., 10 degrees.
As shown in fig. 7, the intelligent touch control system mainly includes four intelligent touch switches, namely a left outer side surface touch switch 6, a left upper side surface touch switch 7, a right outer side surface touch switch 8 and a right upper side surface touch switch 9; the left outer side surface touch switch 6 and the left upper side surface touch switch 7 are respectively electrically connected with the second lens 2 and are fixedly arranged on the glasses legs on the left side of the glasses frame; right lateral surface touch switch 8, upper right side face touch switch 9 be connected with fourth lens 4 electricity respectively to fixed mounting is on the mirror leg on mirror holder right side.
The left outer side surface touch switch 6 controls the second lens 2 to move to the left side (temporal side), and the left upper side surface touch switch 7 controls the second lens 2 to move to the right side (nasal side).
The right outer side surface touch switch 8 controls the fourth lens 4 to move to the right side (temporal side), and the right upper side surface touch switch 9 controls the fourth lens 4 to move to the left side (nasal side).
The touch switch is controlled under three conditions, and the movement of 0.1mm is finished by single touch, so that the accurate diopter adjustment is realized; when the mobile terminal moves to a certain position, the position memory function is completed by pressing for 3 seconds, at most two positions are memorized at the same time, and subsequent quick switching is facilitated; three times of continuous touch (completed within 2 seconds) automatically move to the memory position, and diopter quick switching is completed.
The circuit control system comprises a circuit board for controlling movement, a Micro Control Unit (MCU), a circuit transmission system, a power supply system and a sensor system.
The free-form surface zooming surface F01 is a complex curved surface, and the single-sided zooming lens F is transversely placed in front of the surface of the human eye without designing a far vision area, an intermediate transition area and a near vision area; but transversely designing a continuous zooming channel among the maximum positive diopter position, the maximum negative diopter position and the maximum positive and negative positions, wherein the length of the channel reaches more than 50 mm; meanwhile, the free-form surface zooming surface F01 breaks the limitation of the traditional progressive multi-focus single-surface design and realizes single-surface symmetrical zooming, thereby greatly increasing the diopter change range, realizing large-range continuous zooming and not generating the image jump phenomenon.
The degree of vergence of the lens to light is called refractive power, and has the unit of Diopter (dip, international abbreviation D), and the definition of the top power of the lens: one lens contains two vertex powers, an anterior vertex power and a posterior vertex power. Wherein the back vertex power refers to the inverse of the paraxial back vertex focal length measured in meters, i.e.
Wherein the content of the first and second substances,
the back vertex power of the lens is shown in m-1(ii) a And D, the power of the rear vertex of the positive lens is positive, and the focal power of the rear vertex of the negative lens is negative.
For the single-side variable focal power lens F, the back vertex power cannot be used as the only index of the diopter parameter of the lens, and the distribution of the surface focal power also needs to be analyzed; the method comprises the following specific steps:
the single-side zoom lens F designs the lens into a P point (Positive point), a C area 11 (Continuous zoom channel), an N point (Negative point), and an a area 12 (peripheral Aberration area); the point P is the highest point 5, and the point N is the lowest point 10.
The formula of the refractive power change rate of the C area 11 in the single-side zoom lens F is as follows: is (D)P-DN) The unit of the/L is D/mm, and represents the diopter change degree of the continuous zooming area of the single-sided free-form surface zoom lens; the detailed zoom data are shown in table 1.
TABLE 1
The maximum difference between the single-side zoom lens F and the common spherical lens and the aspherical lens is that the lens has infinite diopter, and the diopter is continuously changed. The image jump phenomenon can not be felt by the wearer, and the stable diopter transition can be realized. The spherical diopter calculation mode is as follows: when a light beam enters another medium from one medium through a single spherical interface, the vergence of the light rays between the different media changes, assuming that the light beam has a refractive index n from the one medium1Through a spherical surface of curvature K (equal to the inverse of the radius of curvature, i.e. 1/r) into refractionA rate of n2The medium of (3), the diopter of the sphere is:
in the case of the single-side variable-focus lens F, the diopter is determined by the front and back surface forms, the lens design is mainly the surface form design, and the continuous change of the diopter is the result of the continuous change of the local surface curvature radius; calculating the diopter of any point on the surface of the C area of the single-sided free-form surface variable-focus lens according to a diopter calculation formula of the spherical lens as follows:
in the above formula, KFront sideIs the curvature of the front surface at the point of the free-form surface (the specific value is the reciprocal of the radius of curvature), KRear endIs the back surface curvature (inverse of the radius of curvature) at that point, n is the refractive index of the lens medium, and d is the thickness of the lens at that point. It is generally believed that when the lens thickness is less than one centimeter, the lens is a thin lens and the change in power due to the lens thickness is negligible. As can be seen from the above formula, the point diopter of the lens is only related to the curvature radius of the front and back surfaces and the refractive index of the lens;
the point diopter of the single-sided free-form surface variable focal lens can be simplified as follows:
the limit calculation for d approaching zero yields:
Dthin＝(n-1)(Kfront side-KRear end)……………………………………………………………(004)
Meanwhile, since the other surface of the single-surface free-form surface variable focal length lens adopts a planar design and has no curvature, namely no diopter, KRear end0. The diopter value at that point is:
Dthin＝(n-1)Kfront side………………………………………………………………(005)
The mathematical function for the free-form surface is designed as follows:
when a light ray passes through a certain point on the single-sided free-form surface lens, because the surface is a non-plane surface, a plurality of normal plane surfaces can appear, and the normal plane surfaces can be intersected with the free-form surface to form a plurality of intersecting curves. Of these, two are most specific: the radius of curvature of a line of intersection is maximum, and the curvature is recorded as K1The other cross-sectional line has the smallest radius of curvature, and the curvature is recorded as K2. Meanwhile, the two intersecting curves are perpendicular to each other.
Obtaining the following data according to a Gaussian curvature calculation formula and an average curvature calculation formula:
the Gaussian curvature K and the average curvature H are respectively used as matrix determinant:
through diopter distribution of each point of the single-surface free-form surface lens, mathematical model fitting can be carried out on the surface of the whole curved surface lens. The lens surface power is continuously varied and is adapted to fit with B-spline functions and radial basis functions. The fitting curve of the B spline function is infinitely differentiable in all nodes; the single-sided free-form surface zoom lens adopts an internal B spline function to fit on a single surface, and the B spline curve describes that the single-sided free-form surface zoom lens is as follows:
Ni，k(u)，Ni，k(v) fitting the basis functions in the x, y directions in the mathematical model, d, to a B-spline surfacei，jIs the control vertex of the free-form surface.
Fitting a mathematical model through the B-spline surface, and simulating a free-form surface model with set diopter change by a computer; performing mould proofing, machining and mould making, and performing pouring numerical control cutting after the mould is produced; preparing a single-sided free-form surface continuous variable focal length lens; the single-side zoom amount is { + 5.00D- — -5.00D }, and the lens detection data are shown in Table 1.
The length of the first lens 1 is 49.8mm, and the height of the first lens is 29.9 mm; the thickness of the highest point of the single lens is 3.25mm, the thickness of the lowest point of the single lens is 1.25mm, and the distance between the highest point and the lowest point is 43 mm; the core ratio of the zoom lens of the invention is as follows: maximum point thickness: minimum point thickness: the distance between the highest point and the lowest point is 13:5: 172.
The second lens 2 has a length of 39.2mm and a height of 29.8 mm. The thickness of the highest point of the single lens is 3.25mm, the thickness of the lowest point of the single lens is 1.25mm, and the distance between the highest point and the lowest point is 33 mm; the core ratio of the zoom lens of the invention is as follows: maximum point thickness: minimum point thickness: the distance between the highest point and the lowest point is 13:5:132
As shown in fig. 4, two sets of lenses are stacked and combined in a staggered manner, the width of the first lens 1 is 10mm wider than that of the second lens 2, and when the lenses are completely overlapped, the distances from the left and right ends of the second lens 2 to the left and right ends of the first lens 1 are respectively 5 mm; the width of the third lens 3 is 10mm wider than that of the fourth lens 4, and when the third lens 3 is completely overlapped, the distances from the left end and the right end of the fourth lens 4 to the left end and the right end of the third lens 3 are respectively 5 mm; the diopter of the overlapped area of the two lenses is zero.
As shown in fig. 5, the first lens 1 is fixed, the first control motor 13 drives the high point of the second lens 2 to move to the highest point of the first lens 1 until the end points of the two lenses are flush, and the diopter of the overlapping area of the two lenses is + 5.00D; the third lens 3 is fixed, the highest point of the fourth lens 4 is driven to move to the high point of the third lens 3 by the second control motor 14 until the end points of the two lenses are flush, and the diopter of the overlapped area of the two lenses is + 5.00D.
Similarly, the first lens 1 is fixed, the first control motor 13 drives the low point of the second lens 2 to move to the low point of the first lens 1 until the end points of the two lenses are flush, and the diopter of the overlapping area of the two lenses is-5.00D; the third lens 3 is fixed, the second control motor 14 drives the low point of the fourth lens 4 to move to the low point of the third lens 3 until the end points of the two lenses are flush, and the diopter of the overlapped area of the two lenses is-5.00D.
The two transmission mechanisms, the first motor and the second motor are connected into two motion control units which are respectively connected with the second lens 2 and the fourth lens 4 to move horizontally, and the two lenses are controlled by the encoder to move horizontally and independently and accurately.
The encoder controls the two lenses to independently and accurately move left and right under the control of the chip and the circuit board.
The intelligent display screen system comprises a display 15 which is arranged on the upper end surface of the mirror bracket; the display screen in the display 15 displays the diopter of the overlapping area of the first lens 1 and the second lens 2 and the overlapping area of the third lens 3 and the fourth lens 4 respectively.
The diopter displayed by the diopter display screen is converted by the moving distance in the encoder of the motion control unit, the minimum recognition moving length of the encoder is 0.1mm, and the corresponding diopter is 0.10D, namely 10 degrees.
The touch switch is controlled under three conditions, and the movement of 0.1mm is finished by single touch, so that the accurate diopter adjustment is realized; when the mobile terminal moves to a certain position, the position memory function is completed by pressing for 3 seconds, at most two positions are memorized at the same time, and subsequent quick switching is facilitated; three times of continuous touch (completed within 2 seconds) automatically move to the memory position, and diopter quick switching is completed.
The invention totally detects 14 single-sided zoom lenses F, each lens carries out diopter detection one by one from the highest point to the lowest point, the detection is carried out at intervals of 1mm, and totally detects 11 diopters. The diopter change difference of each point of each lens of the 14 groups is controlled within 0.1D. The highest diopter is point 1, and the diopter is + 5.00D; the lowest point diopter is point 11, diopter is-5.00D.
The single-side zoom lens continuously zooms in the range of 4mm above and below the center, astigmatism is controlled within 0.50D, and the application of the zoom technology enables the simple presbyopic population to realize the refraction correction function through the intelligent presbyopic glasses under the condition that the frame glasses of the pure presbyopic population are not worn after most people with ametropia perform presbyopia.
While the invention has been described with respect to a number of specific embodiments and ways to achieve the same, it should be understood by those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention; all the components not specified in the present embodiment can be realized by the prior art.
Claims (10)
1. A single-face lens group horizontal movement zooming type intelligent presbyopic glasses comprises a single-face free-form surface zooming lens module, an intelligent zooming control system, an intelligent display screen system, an intelligent touch control system, a circuit control system and a glasses frame; the intelligent zoom control system and the circuit control system are respectively arranged in the spectacle frame, the intelligent display screen system is arranged on the upper end face of the spectacle frame, and the intelligent touch control system is arranged on two spectacle legs of the spectacle frame; the method is characterized in that:
the single-side free-form surface zoom lens module comprises two identical single-side zoom lens groups, each single-side zoom lens group comprises two single-side zoom lenses, each single-side zoom lens is composed of a plane surface and a free-form surface, and the length of one single-side zoom lens is longer than that of the other single-side zoom lens in the two single-side zoom lenses in the group.
Two single-side zoom lenses of one of the single-side zoom lens groups are respectively defined as a first lens and a second lens; and the two single-sided zoom lenses of the other one of the single-sided zoom lens groups are respectively defined as a third lens and a fourth lens.
2. A single-lens-set horizontally-moving zoom-type intelligent presbyopic glasses according to claim 1, characterized in that: the free-form surface zoom surface of the single-sided zoom lens comprises two optical vertexes, namely a free-form surface highest point and a free-form surface lowest point; and the highest point of the free curved surface is arranged to the lowest point of the free curved surface in a wave-like change.
3. A single-lens-set horizontally-moving zoom-type intelligent presbyopic glasses according to claim 1, characterized in that: the first lens and the second lens form a group, the planes of the first lens and the second lens are adjacent and opposite, and a gap of 0.2mm is reserved between the first lens and the second lens; the highest point of the free-form surface zoom surface of the first lens and the lowest point of the free-form surface zoom surface of the second lens are arranged in the same direction; the lowest point of the free-form surface zoom surface of the first lens and the highest point of the free-form surface zoom surface of the second lens are arranged in the same direction; and the first lens is longer than the second lens.
4. A single-lens-set horizontally-moving zoom-type intelligent presbyopic glasses according to claim 1, characterized in that: the third lens and the fourth lens form another group, the planes of the third lens and the fourth lens are adjacent and opposite, and a gap of 0.2mm is reserved between the third lens and the fourth lens; the highest point of the free-form surface zoom surface of the third lens and the lowest point of the free-form surface zoom surface of the fourth lens are arranged in the same direction, the lowest point of the free-form surface zoom surface of the third lens and the highest point of the free-form surface zoom surface of the fourth lens are arranged in the same direction, and the third lens is longer than the fourth lens.
5. A single-lens-set horizontally-moving zoom-type intelligent presbyopic glasses according to claim 1, characterized in that: the first lens and the third lens are mirror axial symmetry about the central axis; the second lens and the fourth lens are in mirror symmetry about the midpoint of the middle surface.
6. A single-lens-set horizontally-moving zoom-type intelligent presbyopic glasses according to claim 1, characterized in that: the single-side zoom lens comprises a point P, a zone C, a point N and a zone A, wherein the point P is an optical central point corresponding to the maximum positive power, namely a position corresponding to the highest point of the free curved surface; the N point is an optical central point corresponding to the maximum negative degree, namely the position corresponding to the lowest point of the free curved surface; the area C is a continuous zooming channel, and is a transition area from the maximum positive degree of the point P to the maximum negative degree of the point N, namely a transition area of a connecting line between the highest point of the free-form surface and the lowest point of the free-form surface; the area A is a peripheral astigmatic area, i.e., an area outside the highest point of the free-form surface, the lowest point of the free-form surface, and a transition area between the highest point of the free-form surface and the lowest point of the free-form surface.
7. A single-lens-set horizontally-moving zoom-type intelligent presbyopic glasses according to claim 1, characterized in that: the ratio of the thickness of the highest point of the free-form surface zoom surface, the thickness of the lowest point of the free-form surface zoom surface and the distance between the highest point and the lowest point of the free-form surface zoom surface ranges from 10:0.5:50 to 20:1.8: 120; the diopter range of the highest point of the free curved surface of the single-sided variable-focus lens is +2.50D to +5.00D, and the diopter range of the lowest point of the free curved surface of the single-sided variable-focus lens is-2.50D to-5.00D; the diopter range of the single-sided zoom lens group consisting of the two single-sided zoom lenses is +5.00D to-5.00D linear zooming.
8. A single-lens-set horizontally-moving zoom-type intelligent presbyopic glasses according to claim 1, characterized in that: the intelligent zoom control system comprises a motor I, a motor II, two encoders and a control circuit board provided with a chip; the encoder of one of the encoders is connected with the second lens, the other encoder is connected with the fourth lens, the second lens is connected and driven with the motor through the transmission mechanism, the first lens is fixedly arranged on the spectacle frame, the fourth lens is connected and driven with the motor through the transmission mechanism, and the third lens is fixedly arranged on the spectacle frame; the second lens and the fourth lens move independently and do not influence each other.
9. A single-lens-set horizontally-moving zoom-type intelligent presbyopic glasses according to claim 1, characterized in that: the intelligent display screen system comprises a display, wherein the display is arranged on the upper end surface of the mirror bracket; the intelligent touch control system mainly comprises four intelligent touch switches, namely a left outer side surface touch switch, a left upper side surface touch switch, a right outer side surface touch switch and a right upper side surface touch switch; the left outer side surface touch switch and the left upper side surface touch switch are respectively connected with the second lens and fixedly arranged on the glasses legs on the left side of the glasses frame; and the right outer side surface touch switch and the right upper side surface touch switch are respectively connected with the fourth lens and fixedly installed on the glasses legs on the right side of the glasses frame.
10. A single-lens-set horizontally-moving zoom-type intelligent presbyopic glasses according to claim 1, characterized in that: the circuit control system comprises a circuit board for controlling movement, a Micro Control Unit (MCU), a circuit transmission system, a power supply system and a sensor system.
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