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CN-122018177-A - Progressive multi-focus multi-point defocus converging lens and design method thereof

CN122018177ACN 122018177 ACN122018177 ACN 122018177ACN-122018177-A

Abstract

The invention discloses a progressive multi-focus multi-point defocus converging lens and a design method thereof, relating to the technical field of lenses; the invention relates to a near-sighted anti-myopia anti-focusing lens, which comprises a lens matrix, wherein the upper part of the lens matrix is a far-sighted region, the lower part of the lens matrix is a near-sighted region, the far-sighted region is connected with the near-sighted region through a progressive channel with diopter changing along the vertical direction, a plurality of convex micro lens units are distributed in the far-sighted region, the progressive channel and the region outside a bright vision region of the near-sighted region, the optical axes of the convex micro lens units deflect towards the corresponding optical centers according to the region, namely deflect towards the geometric centers of the lens positioned on the temporal side and the nasal side, deflect towards the optical centers of the far-sighted region positioned around the far-sighted region, deflect towards the optical centers of the near-sighted region positioned around the near-sighted region, so that near-sighted defocused regions converged in front of retina are respectively formed through the partitioned converging defocused structure, and accurate near-sighted defocused signals can be provided in looking far, middle and near-sighted regions.

Inventors

  • MA WEIGUO

Assignees

  • 马卫国

Dates

Publication Date
20260512
Application Date
20260328

Claims (10)

  1. 1. Progressive multi-focal multi-defocus converging lens comprising a lens base (1) having a refractive correction function, characterized in that the lens base (1) comprises: a distance light zone (2) located at the upper part of the lens; A near light zone (3) located at the lower part of the lens; a progressive passage (4) connecting the distance optical zone (2) and the near optical zone (3) and having a progressive variation in diopter in a vertical direction, and A plurality of convex micro lens units distributed outside the bright vision area of the far light area (2), the progressive channel (4) and the near light area (3); The convex micro lens units in each area are provided with different additional top focal power, and myopia defocus is formed on the retina of the human eye under the condition of reducing adjustment; and, at least part of the optical axis of the convex micro-lens unit is in a deflection state relative to the optical axis of the lens base body (1), and the deflection direction is determined according to the area where the convex micro-lens unit is located: Convex micro lens units positioned on the temporal side and the nasal side of the lens, and the optical axis of the convex micro lens units deflects towards the geometric center direction of the lens; convex micro lens units positioned at the periphery of the bright vision area of the far light area (2), and the optical axis of the convex micro lens units deflects towards the optical center direction of the far light area (2); a convex micro lens unit located at the periphery of the bright vision area of the near light area (3), the optical axis of which deflects towards the optical center direction of the near light area (3); Thus, near-sightedness defocus arc areas converging in front of retina are formed in the far-light area, the near-light area and the peripheral area respectively, and near-sightedness defocus is generated.
  2. 2. Progressive multi-focal multi-point defocus converging lens according to claim 1, wherein the convex micro lens unit add power varies progressively continuously or discontinuously from the distance optical zone (2) to the near optical zone (3) and generally increases in the direction from the distance optical zone (2) to the near optical zone (3).
  3. 3. The progressive multi-point defocus converging lens according to claim 2, wherein, In the distance optical zone (2), the additional top power D1 of the single convex micro lens unit is +2.00D to +5.00D; In the near optical zone (3), the additional top power D2 of the single convex microlens unit is +4.00D to +7.50D, and D2> D1, D2-D1= +2.00D+ -0.50D.
  4. 4. Progressive multi-point defocus converging lens according to claim 1, wherein the angle of deflection α of the optical axis of the convex micro-lens unit with respect to the normal to the lens substrate (1) is 0 ° < α+≤25°, and wherein the angle of deflection α increases with increasing optical center distance of the convex micro-lens unit from the region in which it is located.
  5. 5. The progressive multi-point defocus converging lens according to claim 4, wherein the convex microlens unit located at the periphery of the bright vision zone of the far-field optical zone (2) has an optical axis having a deflection angle α with respect to the optical axis of the bright vision zone of the far-field optical zone (2) satisfying 0 ° < α≤20 °; the deflection angle alpha of the optical axis of the convex micro lens unit positioned at the periphery of the bright visual area of the near light area (3) relative to the optical axis of the bright visual area of the near light area (3) is 0 degree < alpha less than or equal to 20 degrees.
  6. 6. Progressive multi-focus multi-point defocus converging lens according to claim 1, wherein the convex micro lens units are distributed in concentric annular shape along the radial direction at the periphery of the far light zone (2) and the near light zone (3), in fan-shaped annular sections at both sides of the progressive channel (4), and in concentric annular shape along the radial direction at the peripheral zone.
  7. 7. The progressive multi-point defocus converging lens according to claim 1, wherein the convex microlens unit has a diameter of 0.5mm to 1.5mm and a center-to-center spacing of adjacent convex microlens units is 1.0mm to 3.0mm.
  8. 8. The progressive addition multi-point defocus lens of claim 1, wherein the convex microlens unit is a combination of one or more of a circle, an ellipse, or a polygon.
  9. 9. Progressive multi-focal multi-point defocus converging lens according to claim 1, wherein the convex micro lens unit is formed on the front and/or rear surface of the lens base (1) by nano-imprinting or injection molding and the progressive channel (4) is located on the front or rear surface of the lens.
  10. 10. A method of designing a progressive multi-focal multi-point defocus convergence lens comprising the steps of: S1, designing a lens matrix (1) for providing basic diopter according to prescription parameters of a wearer, wherein the lens matrix (1) comprises a far light zone (2), a near light zone (3) and a progressive channel (4) for connecting the far light zone and the near light zone; S2, determining a defocusing area for distributing convex micro lens units on the surface of the lens matrix (1), wherein the defocusing area comprises a peripheral area of a bright vision area of a far-light area (2), a peripheral area of a bright vision area of a near-light area (3), two side areas of a progressive channel (4) and a peripheral area; S3, establishing an optical axis deflection distribution model according to the curved surface shape of the retina of the human eye, and calculating the optical axis deflection directions and angles of the convex micro lens units required at different positions in the defocusing area; S4, arranging convex micro-lens units in the defocusing area according to the optical axis deflection distribution model, enabling the optical axes of the convex micro-lens units positioned at the periphery of the bright vision area of the far-light area (2) to converge and deflect towards the optical center of the far-light area (2), enabling the optical axes of the convex micro-lens units positioned at the periphery of the bright vision area of the near-light area (3) to converge and deflect towards the optical center of the near-light area (3), and enabling the optical axes of the convex micro-lens units positioned at the periphery area to converge and deflect towards the geometric center of the lens; S5, fusing the structural data of the convex micro lens unit with the data of the lens matrix (1) to generate lens processing data.

Description

Progressive multi-focus multi-point defocus converging lens and design method thereof Technical Field The invention relates to the technical field of lenses, in particular to a progressive multi-focus multi-point defocus converging lens and a design method thereof. Background The spectacle lens is a core optical element of spectacles, is mostly made of materials such as optical resin, glass and the like through precision processing, and can be classified into single-light lenses, progressive multi-focus lenses, defocus prevention and control lenses and the like by adjusting and controlling light propagation paths to correct the problems of myopia, hyperopia, astigmatism and other ametropia. The retina receives a peripheral hyperopic defocus signal that stimulates the eye axis to grow, while a myopic defocus inhibits the eye axis from over-extending. The multi-point defocus lens produces continuous near vision defocus by distributing a plurality of microlenses over the lens, and the progressive addition lens reduces accommodative lag by progressive addition lens power progression. However, the conventional various lenses have certain limitations, and the progressive addition lenses can realize the gradual change of the distance, middle and near light, reduce the adjustment load when looking near, but cannot form effective myopia defocus signals on peripheral retina. Although the multi-point defocusing lens can generate peripheral myopia defocusing signals, the luminosity gradient cannot be realized, and particularly, the eye movement adjustment is large when looking near, so that the defocusing signals are unstable. The two lenses have single effect, and are difficult to optimize the adjusting function and stabilize the defocusing signal. Disclosure of Invention The invention aims to overcome the defects of the prior art, and provides a progressive multi-focus multi-point defocus converging lens and a design method thereof, so as to solve the technical problems that the prior progressive multi-focus lens cannot generate effective peripheral defocus, and an existing defocus lens is unstable in defocus signal and large in adjustment load when looking close. In order to achieve the aim of the invention, the invention adopts the following technical scheme: a progressive multi-focal multi-point defocus converging lens comprising a lens base having a refractive correction function. The lens matrix comprises a far light zone positioned at the upper part of the lens, a near light zone positioned at the lower part of the lens, and a progressive channel which connects the far light zone and the near light zone and has diopter which gradually changes along the vertical direction. The near optical zone is used for providing the diopter required by the wearer when the wearer looks near, and the progressive channel is used for realizing smooth transition from the far diopter to the near diopter so as to provide clear and comfortable visual experience for the far, middle and near distances for the wearer while reducing the adjustment load when looking near. On the basis of the lens matrix, a plurality of convex micro lens units are distributed in the areas except the bright vision areas of the far light area, the progressive channel and the near light area. The plurality of convex microlens units are provided with additional top focal power for forming a myopic defocus signal on the retina of a human eye to suppress an excessive increase in the eye axis. Furthermore, the optical axes of the convex micro lens units are not all parallel to the optical axis of the lens base body, but respectively deflect towards the corresponding optical center direction according to the difference of the areas of the convex micro lens units. Specifically: Convex micro lens units positioned on the temporal side and the nasal side of the lens, and the optical axis of the convex micro lens units deflects towards the geometric center direction of the lens; Convex micro lens unit located at the periphery of the bright visual zone of the far light zone, the optical axis of which deflects towards the optical center direction of the far light zone; and a convex micro lens unit positioned at the periphery of the bright visual area of the near light area, wherein the optical axis of the convex micro lens unit deflects towards the optical center direction of the near light area. The design makes three myopia defocusing arc areas converged in front of retina formed in the far light area, the near light area and the peripheral area. When people see objects at different distances, especially when the eye adjustment is reduced during near vision, stable and good myopia defocus effect can be formed. The technical principle is that the retina of the human eye has a curved surface shape, if the optical axes of all the microlenses are arranged in parallel, the position of the landing point of the defocused light on the retina can deviate along with the change