CN112649971A - Diffraction slope ring type peripheral out-of-focus spectacle lens - Google Patents
Diffraction slope ring type peripheral out-of-focus spectacle lens Download PDFInfo
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Abstract
衍射坡环型周边离焦眼镜片属于眼镜技术领域。本发明眼镜片包括中央折射区、周边衍射区。周边衍射区分为全环形、半环形、扇环形，半环形和扇环形又分为鼻侧周边衍射区、颞侧周边衍射区。周边衍射区内同心轴衍射坡环设置宽度为5nm至2mm、高度为0.1nm至16μm、陡峭侧朝向光学中心、平缓侧远离光学中心，衍射坡环夹角＜5°。多个衍射坡环横截面为彼此凸凹相连的锯齿状，周边衍射区相对于中央折射区屈光力为正加值，降低衍射坡环宽度和高度、增加坡环数量，加大周边衍射区正加值。衍射坡环设置在前镜面、后镜面、或者嵌入基质中，复合层或者镀膜层厚度≥衍射坡环高度，屈光力梯度差值为±0.01D至0.25D。
The diffraction slope ring type peripheral defocus spectacle lens belongs to the technical field of spectacles. The spectacle lens of the present invention includes a central refraction area and a peripheral diffraction area. The peripheral diffraction area is divided into full ring, half ring, and fan ring, and the semi ring and fan ring are further divided into the nasal peripheral diffraction area and the temporal peripheral diffraction area. The concentric axis diffraction ramp rings in the peripheral diffraction zone are set with a width of 5 nm to 2 mm and a height of 0.1 nm to 16 μm. The steep side faces the optical center and the gentle side is far away from the optical center. The cross-sections of a plurality of diffraction slope rings are serrated with convex and concave connected to each other. The refractive power of the peripheral diffraction area is positive additive relative to the central refractive area. Reduce the width and height of the diffraction slope ring, increase the number of slope rings, and increase the positive additive value of the peripheral diffraction area. . The diffraction slope ring is arranged on the front mirror surface, the rear mirror surface, or embedded in the matrix, the thickness of the composite layer or the coating layer is greater than or equal to the height of the diffraction slope ring, and the refractive power gradient difference is ±0.01D to 0.25D.
Description
Technical Field
The invention belongs to the technical field of glasses, and particularly provides a diffraction slope ring-shaped peripheral out-of-focus spectacle lens for correcting hyperopic out-of-focus at the periphery of retina of a myopic eye.
Background
Medical science today admits: the growth of the myopia eyes of children and teenagers depends on the regulation of peripheral retinal defocus, the peripheral retinal hyperopic defocus promotes the growth of the eyes, the peripheral retinal hyperopic defocus is corrected, and the growth of the myopia eyes can be controlled.
Smith EL is a peripheral defocus theory associate and a peripheral defocus spectacle lens initializer, Smith initiatively invented a peripheral defocus frame spectacle lens in 2005, and the patent name: lenses for myopia correction, chinese patent No.: 2006800441239, the central optical zone of which is a perfect circle and the peripheral treatment zone is an annular peripheral out-of-focus spectacle lens. Smith another patent name: ophthalmic lens element, chinese patent No.: 2008801159183 patent center optical zone ofThe patent discloses a peripheral out-of-focus spectacle lens with a transverse oval shape and an annular peripheral treatment area, and the peripheral out-of-focus frame spectacle lens is released by German Calzaisi optics at 24.8.2010 and is sold under the trade name of
A zeiss growing le spectacle lens. The central optical area and the peripheral treatment area of the peripheral out-of-focus spectacle lens are common optical refraction lenses and are called refraction type peripheral out-of-focus spectacle lenses.
Haoya lens Thailand Limited creates peripheral out of focus lens of microlens, patent name: spectacle lens, chinese patent No.: 2013106281748 which discloses that the peripheral treatment zone is a plurality of independent islands of 0.8mm to 2.0mm diameter and 0.50mm area2To 3.14mm2Circular area, under the name of patent
The product discloses that the peripheral treatment zone consists of 396 individual cylindrical microlenses.
Patent name of the chinese arborvitae center for vision research: devices, systems and/or methods for myopia control, chinese patent No.: 2017800806128 which discloses that the peripheral treatment zone is composed of a plurality of individual circular microlenses 400 to 750 μm in diameter and 0, 2mm in area2To 0, 3mm2The microlenses are located on the front, back or embedded in the ophthalmic lens matrix.
International corporation filed five patents on microlens out-of-focus spectacle lenses, wherein: the patent name: lens element, chinese patent No.: 2019800045681, respectively; the patent name: lens element, chinese patent No.: 2019800045713, respectively; the patent name: lens element, chinese patent No.: 2019800045728, respectively; the patent name: lens element, chinese patent No.: 2019800051767, respectively; the patent name: lens element, chinese patent No.: 2019800091213 which disclose an outline shape in a circle having a diameter of 0.8mm or more and 3.0mm or less. The patent is named as
The product discloses that the peripheral treatment zone consists of 11 circles of star 1021 cylindrical microlenses.
The related microlens out-of-focus spectacle lens patent of shanghai viastar optical application 8, wherein the patent name: a manufacturing method of a new excellent multifocal polyurethane lens is disclosed, wherein the manufacturing method comprises the following steps: 2019107101792, respectively; the patent name: a manufacturing method of a new excellent PRO multi-focus polyurethane lens, Chinese patent No: 2019107101557, respectively; the patent name: a manufacturing method of GovernMyo polyurethane lenses, which has the following Chinese patent numbers: 2019107092793, respectively; the patent name: a manufacturing method of a double-sided composite new-optimization polyurethane lens, which is disclosed in Chinese patent numbers: 2019107102189, respectively; the patent name: a composite defocusing multifocal polyurethane lens is disclosed in the Chinese patent number: 2019212370027, respectively; the patent name: a double-sided composite lens, which is disclosed in Chinese patent No.: 2019212394727, respectively; the patent name: a reinforced multifocal polyurethane lens, chinese patent No.: 2019212396737, respectively; the patent name: a multifocal lens, chinese patent No.: 2019212397161, the above patent discloses microlenses of 0.01mm to 2.0mm in diameter and 0.005 μm to 5 μm in height. Shanghai Weixing optical patent is sold under the name of Shanghai Weixing optical patent
The product discloses that the peripheral treatment zone consists of 407 cylindrical microlenses.
Patent name of Wenzhou medical university: a flexible refractive film patch with microstructures, chinese patent No.: 201910030136X; another patent name: an eyeglass with a girdle and a cylindrical microstructure on the surface, wherein the surfaces of the eyeglass are provided with the girdle and the cylindrical microstructure as shown in the Chinese patent No.: 2020100006662 which discloses that the peripheral treatment area of the lens with one side of the lens being an attaching surface and the other side of the lens being a diopter surface consists of a plurality of independent ring-belt cylindrical microlenses.
Patent name of the moon lens: a lens for slowing down myopia progression and a preparation method thereof are disclosed in the Chinese patent numbers: 2020106790150 which discloses a peripheral out-of-focus ophthalmic lens with circular microlenses embedded in the matrix of the blank sheet.
The peripheral treatment area of the peripheral defocused spectacle lens disclosed by Haoya, Hua Baien, Yixue, Weixing optics, Wenzhou medical university and Mingzhou lens patent consists of a plurality of independent cylindrical microlenses, and the technical difference is the diameter of the cylindrical microlenses. The central area of the peripheral out-of-focus spectacle lens is a refraction type spectacle lens, the peripheral treatment area of the peripheral out-of-focus spectacle lens consists of a plurality of independent cylindrical micro-lens arrays, the peripheral out-of-focus spectacle lens can be called as a refraction micro-lens mixed type peripheral out-of-focus spectacle lens or a micro-lens type peripheral out-of-focus spectacle lens for short, and the patents or products are all myopia retina peripheral out-of-focus spectacle lenses corrected by 360 degrees of.
Smith, in its latest research papers, critically points out that it originally designed the treatment zone in the 360 ° peripheral region of the lens, has design defects, and proposes that peripheral hyperopic defocus inducing eyeball growth is a Local, regioselective mechanism, regional mechanism. Temporal retinal dominant eyeball growth, asymmetry in nasal-temporal peripheral defocus, failure of annular correction to eliminate peripheral refractive error, and generation of a new peripheral refractive error, hyperopic anisometripidi, see literature: smith EL: optom Vis Sci, 2013, 90: 1176-1186; smith EL: invest Ophthalmol Vis Sci, 2010, 51: 3864-3873; smith EL: invest opthalmol, Vis Sci, 2009, Nov; 50(11): 5057-5069. Smith, in WO2012/012826a1, WO2013/134825a1, describes a 40 ° temporal greater than nasal peripheral refraction +0.83D for-2.27D ± 0.83D, 1155 cases of myopic eye retinal peripheral refraction test.
The applicant finds that for 1809 cases of myopia peripheral refraction detection: the higher the myopic eye degree is, the higher the hyperopic defocus of the retina periphery at the temporal side is 40 degrees, the higher the hyperopic refractive power difference value of the retina periphery at the nasal temporal side is, and the individual maximum refractive power difference value is larger than + 1.50D. No matter the refractive or micro-lens type peripheral out-of-focus spectacle lenses, the peripheral treatment area uses the equal positive value, and the hyperopic refractive error around the nasal temporal retina cannot be corrected, so that the correction of the hyperopic refractive error around the nasal temporal retina has more scientific significance for preventing and controlling the myopia. The peripheral out-of-focus spectacle lens which is not divided into the nasal temporal side and corrected by the equivalent annular positive addition value is called as a first-generation peripheral out-of-focus theory and a product.
The applicant filed a previous application, the name of which: a wide visual field near-sighted peripheral out-of-focus spectacle lens, Chinese patent No.: 2014100285186, respectively; disclosed is a refraction type nasal-temporal side peripheral out-of-focus spectacle lens, which is divided into a central optical area, a nasal side treatment area and a temporal side treatment area. The applicant filed a previous application, the name of which: peripheral out of focus lens in nasal temporal district, chinese patent number: 2018217179277, respectively; the patent name: peripheral out of focus lens of microlens, chinese patent No.: 2019110734593, 2019218853492, discloses a nasal-temporal side treatment area which is composed of a plurality of cylindrical microlenses, the refractive power of the nasal-temporal side peripheral microlens area is larger than that of the temporal side peripheral microlens area, the radial line length of each independent microlens is 0.2mm to 4.5mm, or the radial line length of each independent microlens is set to be 10nm to 100nm, and the nasal-temporal side microlens peripheral out-of-focus spectacle lens is formed. No matter the peripheral out-of-focus spectacle lens of refraction type or microlens type is disclosed in the above patent, the peripheral treatment area is divided into a nose-temporal side area, and the spectacle lens is corrected by using a non-equivalent positive addition value, which is called as a second generation peripheral out-of-focus theory and a product.
The existing peripheral out-of-focus spectacle lenses are of refraction type and micro-lens type, patents and products of diffraction type peripheral out-of-focus frame spectacle lenses are not seen, novel surface type innovative design needs to be developed for the peripheral out-of-focus spectacle lenses, and the peripheral out-of-focus spectacle lenses for myopia still remain one of the technical problems in the field of spectacles.
Disclosure of Invention
The invention aims to provide a diffraction slope ring-shaped peripheral out-of-focus spectacle lens.
The purpose of the invention is realized by the following technical scheme:
the diffractive slope ring-shaped peripheral out-of-focus spectacle lens is a frame spectacle lens, and is hereinafter referred to as such a spectacle lens.
The spectacle lens comprises a central refraction area and a peripheral diffraction area, wherein the peripheral diffraction area is divided into a full ring shape, a semi-ring shape and a fan-shaped ring shape according to the shape and the circumferential azimuth angle, and the semi-ring shape and the fan-shaped ring shape are also divided into a nasal side peripheral diffraction area and a temporal side peripheral diffraction area. And 5 to 60 concentric axis diffraction slope rings are arranged in the peripheral diffraction zone, the width of each diffraction slope ring is 5nm to 2mm, the height of each diffraction slope ring is 0.1nm to 16 mu m, the steep side of each diffraction slope ring faces to the optical center, the gentle side of each diffraction slope ring is far away from the optical center, and the included angle of each diffraction slope ring is less than 5 degrees. The adjacent two diffraction slope rings are in gapless connection or have a space of 0.05mm to 0.25mm, the same diffraction slope ring has the same circumference azimuth angle, the same width and the same height, and the cross sections of the diffraction slope rings are in a sawtooth shape which is in convex-concave connection with each other. The refractive power of the peripheral diffraction area relative to the central refraction area is a positive value, the width and the height of each diffraction slope ring are gradually reduced from the center to the periphery, the number of the slope rings is increased, and the positive value of the peripheral diffraction area is gradually increased. Two adjacent diffraction slope rings are arranged in a refraction progressive mode, the peripheral diffraction zone is provided with 5 refraction levels, and the diffraction slope rings are arranged on the front mirror surface, the rear mirror surface or embedded in the matrix. The spectacle lens consists of one, two, three or four layers, the thickness of the composite layer or the coating layer is more than or equal to the height of the diffraction slope ring, and the refractive power gradient difference value of the central refraction area and the peripheral diffraction area is +/-0.01D-0.25D.
The central refraction area of the spectacle lens is positioned in the central area of the spectacle lens and is circular or in a transverse oval shape, the peripheral diffraction area is a 360-degree circumferential azimuth angle, and each diffraction slope ring is provided with an equal or unequal positive addition value to manufacture the full-annular diffraction slope ring type peripheral out-of-focus spectacle lens. Or, a diffraction distinguishing boundary line is arranged along the vertical radial line of the optical center, the peripheral diffraction area is divided into 180-degree circumferential azimuth angles on the nasal side and the temporal side, the peripheral diffraction area on the nasal side is the nasal side peripheral diffraction area, and the peripheral diffraction area on the temporal side is the temporal side peripheral diffraction area, so that the semi-annular diffraction slope ring-shaped peripheral out-of-focus spectacle lens is manufactured. Or the central refraction area extends upwards and downwards to form an up-and-down window type, the peripheral diffraction areas are provided with peripheral azimuth angles of more than or equal to 90 degrees and less than or equal to 180 degrees on the nasal side and the temporal side respectively, the peripheral diffraction areas on the nasal side and the temporal side are respectively larger than the peripheral azimuth angle of the central peripheral diffraction area by 10 degrees to 20 degrees, and the fan-shaped diffraction slope ring-shaped peripheral out-of-focus spectacle lens is manufactured.
The length of the central refracting area of the spectacle lens along the horizontal radial line of the optical center is 8mm to 16mm, and the customized refractive power of the central refracting area according to the myopic diopter is 0.00D to-10.00D and less than 4.00 DS. The lower area of the central refraction area is provided with a base facing the nose side of 0.5 delta-6.0 delta triangular prism, or the lower area of the central refraction area is provided with a base facing the lower side of 0.5 delta-3.0 delta triangular prism.
The peripheral diffraction zone of the spectacle lens is provided with 10 to 30 concentric axis diffraction slope rings, the width of the diffraction slope rings is 10 mu m to 1mm, the height of the diffraction slope rings is 10nm to 10 mu m, and the included angle of the diffraction slope rings is less than 2 degrees. The width of each diffraction slope ring is gradually reduced from 10 mu m to 0.1mm and the height of each diffraction slope ring is gradually reduced from 5nm to 5 mu m at a position 10mm away from the optical center, the number of the diffraction slope rings is increased, so that the positive value of peripheral diffraction zones from 10mm to 20mm away from the optical center is increased, and the hyperopic defocus at the periphery of the retina of 40 degrees is corrected.
The width of the lens diffraction slope ring is 100-700 μm, the height is 1-8 μm, the peripheral diffraction zone is at least 20mm away from the optical center, the refractive power is set to be 0.50-5.00D larger than that of the central refraction zone, and the difference of the refractive power gradient of the central refraction zone and the peripheral diffraction zone is +/-0.05-0.15D.
The peripheral area of the front lens surface of the spectacle lens is provided with a peripheral diffraction area, the peripheral area of the rear lens surface is provided with a peripheral refraction area with a positive value of gradually increasing refractive power from the center to the periphery, and the combined refractive power of the peripheral area of the front lens surface and the rear lens surface is larger than the refractive power of the central refraction area from 0.50D to 5.00D.
The nasal peripheral diffraction area corrects hyperopic defocus on the peripheral of the temporal retina, the temporal peripheral diffraction area corrects hyperopic defocus on the peripheral of the nasal retina, the plane refractive powers of the nasal peripheral diffraction area and the temporal peripheral diffraction area relative to the central refraction area are positive values, and the nasal peripheral diffraction area is larger than the temporal peripheral diffraction area by 0.50D to 3.00D.
The refractive powers of the nasal side peripheral diffraction area and the temporal side peripheral diffraction area are customized according to the nasal temporal side retina peripheral refractive detection power of an individual lens dispenser. Or, setting N + N: t + n, 5 secondary positive values, where: n + represents the positive addition value of the peripheral diffraction zone on the nose side, T + represents the positive addition value of the peripheral diffraction zone on the temporal side, and N represents the degree of the positive addition value; respectively as follows: n + 1.00D: t + 0.50D; n + 2.00D: t + 1.25D; n + 3.00D: t + 2.0D; n + 4.00D: t + 2.75D; n + 5.00D: t +3.50D, 5 secondary positive values respectively correspond to five myopia diopters from 0.00D to-2.00D; -2.01D to-3.00D; -3.01D to-4.00D; -4.01D to-6.00D; not less than-6.01D. The refractive power of the full annular peripheral diffraction zone respectively corresponds to five myopia diopters from 0.00D to-2.00D according to the positive addition values of 1.00D, 2.0D, 2.50D, 3.00D and 3.75D, and 5 secondary positive addition values; -2.01D to-3.00D; -3.01D to-4.00D; -4.01D to-6.00D; not less than-6.01D. For children and teenagers with myopia onset earlier than 12 years old, more than-1.00D per year, and with eye axis increasing per year, and high myopia of both parents, respectively increasing N +0.75D on the basis of 5 secondary positive values: t + 0.50D.
The height of the diffraction slope ring of the spectacle lens is less than 10 mu m, and the peripheral diffraction zone has zero prism power. One diffraction slope ring is divided into a plurality of diffraction sections, the distance between every two adjacent diffraction sections is 10 mu m to 0.1mm, and the diffraction slope ring at least corrects the myopia optical signals at the wavelength between 510nm and 610 nm. The spectacle lens is composed of an annular or a plurality of independent diffractive optical elements with steep surfaces, such as triangles, rectangles, squares, rectangles, pentagons and hexagons.
Such an ophthalmic lens is manufactured as follows:
a. the spectacle lens is prepared by injecting polycarbonate or polyurethane raw materials with the refractive index of 1.53-1.74 and the Abbe number of 30-43 into a peripheral diffraction zone mould made of a front mirror surface, and performing the procedures of curing, demoulding, edging, cleaning, hardening and film adding to prepare a qualified blank sheet. The blank sheet is placed on a numerical control garage, the refractive power of a central refraction area is customized by the rear mirror surface according to the myopia refractive power, and the diffraction slope ring is arranged on the diffraction slope ring-shaped peripheral out-of-focus spectacle lens of the front mirror surface through upper disc, grinding, polishing, lower disc, hardening and film plating.
b. Selecting an optical plastic film, and adopting hot press molding, solvent etching molding and laser engraving molding, wherein the surface of the optical plastic film is a central refraction area and a peripheral diffraction area. After the optical plastic film forming spectacle lens is bent, the optical plastic film forming spectacle lens is embedded into a mold between two layers of resin monomers, and is heated, cured and formed to prepare the diffraction slope ring type peripheral defocusing spectacle lens with the diffraction slope ring arranged in the spectacle lens matrix.
c. Selecting soft transparent plastic polymer material, adopting centrifugal casting forming, cutting grinding forming and direct compression molding forming to prepare the outer mirror surface with the thickness of 0.5mm to 2.0mm as a light bending surface, and the inner mirror surface as a plain pasting surface. The central area of the outer lens surface is set to be a central refraction area with zero diopter, the peripheral diffraction area is set to be a full annular peripheral diffraction area with 360-degree equivalent positive addition value, or the nasal side peripheral diffraction area and the temporal side peripheral diffraction area with unequal positive addition values on the nasal and temporal sides are set, the pasting surface is pasted on the frame spectacle lens, and the flexible film pressing type diffraction slope ring type peripheral out-of-focus spectacle lens is manufactured.
d. The spectacle lens is provided with one, two, three or four layers from the surface layer to the inner layer, wherein the viscosity of two layers of light hardening resin in an unhardened state is 40cP to 2000cP, the first layer and the second layer are provided with a central refraction region, the third layer or the fourth layer is provided with a peripheral diffraction region, the thickness of a composite layer or a coating layer is larger than or equal to the height of a diffraction slope ring, and the thickness is 5nm to 16 mu m.
Compared with the prior art, the invention has the beneficial effects that:
1. the existing microlens type peripheral out-of-focus spectacle lens is composed of a cylindrical microlens array, the cylindrical microlens belongs to a refractive optical element, and an independent cylindrical microlens is focused by a microlens and belongs to a microlens refractive spectacle lens.
2. No patent and product of diffraction type peripheral out-of-focus frame spectacle lens are available.
3. The invention applies the diffraction step technology to the design of the peripheral defocused spectacle lens for the first time, the spectacle lens comprises a central refraction area and a peripheral diffraction area, the diffraction optical element is a diffraction slope ring, the width and the height of the diffraction slope ring are reduced, the number of the diffraction slope rings is increased, the refractive power of the peripheral diffraction area is increased, the width and the height of the diffraction slope ring are increased, the number of the diffraction slope rings is reduced, the refractive power of the peripheral diffraction area is reduced, and the width of the diffraction slope ring also determines the direction of light, namely the focal position. The invention creates a diffraction slope ring-shaped peripheral defocus spectacle lens which can effectively correct hyperopic defocus at the periphery of retina of a myopic eye.
Drawings
FIG. 1 is a schematic diagram of the front and enlarged structure of a fan-shaped diffraction slope ring-shaped peripheral out-of-focus spectacle lens;
FIG. 2 is a schematic diagram of the front and enlarged structure of a full annular diffraction slope annular peripheral out-of-focus spectacle lens;
FIG. 3 is a schematic diagram of the front and enlarged structure of a semi-annular diffractive slope ring type peripheral out-of-focus spectacle lens;
FIG. 4 is an enlarged schematic view of a front mirror diffraction slope ring type peripheral out-of-focus spectacle lens;
FIG. 5 is an enlarged schematic view of a rear mirror diffraction slope ring type peripheral out-of-focus spectacle lens;
FIG. 6 is an enlarged schematic view of a diffractive ramp ring type peripheral out-of-focus ophthalmic lens embedded in a matrix;
FIG. 7 is an enlarged structural schematic view of a cross section of the central refractive region and the peripheral diffractive region;
FIG. 8 is a partially enlarged view of a diffraction ramp ring;
FIG. 9 is an enlarged schematic view of the diffractive ramp ring R1, R2 having a width greater than R3, R4, R5;
FIG. 10 is a schematic illustration of a focused image of a central refractive zone and a peripheral diffractive zone diffraction ramp ring.
In the figure: 1 a central refractive region; 2 peripheral diffraction zones; 3 nasal side peripheral diffraction zone; 4 temporal peripheral diffraction zone; 5, full ring shape; 6, a semi-ring shape; 7, a ring shape; 8 diffraction zone; 9 diffraction demarcating lines; 10 diffraction slope rings; 11 diffraction slope ring width; 12 diffraction slope ring height; 13 diffraction slope ring included angle; 14 a front mirror surface; 15 rear mirror surface; 16 a substrate; 17 base face nose prism lens; 18 are focused.
Symbol abbreviations: HM: (Horizontal Meridian) Horizontal radial lines; and vM: (Vertical mean) Vertical diameter line; ns (nasal side) nasal; ts (temporal side) temporal side; n + N: (Nasal) the positive value of the diffraction zone around the nose side, n representing the specific number; t + n: (Temporal) a positive addition value of Temporal peripheral diffraction zones, n representing a specific number; rn (Ring) diffraction slope ring, n represents specific number.
Detailed Description
The invention provides a diffraction slope ring-shaped peripheral out-of-focus spectacle lens through the following specific implementation modes:
the term meaning in the description of the invention:
refractive eye lenses (reflective glasses): refraction refers to a spherical or aspherical spectacle lens in which light passes through a lens and then converges to a focal point, and is the most common spectacle lens type.
Microlens-type spectacle lenses (Microlens eyeglasses): the micro-lens spectacle lens surface type is composed of a plurality of micro-lenses like a compound eye and honeycomb structure, the micro-lenses utilize the refraction effect of light, and the micro-lens type peripheral out-of-focus spectacle lens also belongs to a refraction spectacle lens. Diffraction phenomena also occur at the edges of cylindrical microlenses, but only as a side effect.
Diffractive ophthalmic lenses (diffractive eyeglasses): diffraction refers to the phenomenon of light waves propagating around obstacles, and is also called diffraction. The surface of the diffraction step optical element is refined by millimeter level, micron level and nanometer level, the extremely low chromatic aberration is realized by changing the width, height and number of the diffraction slope ring, the positive value added degree is adjusted, the focusing imaging position is adjusted, and the imaging is extremely clear.
The invention is described in further detail below with reference to the following figures and detailed description:
a diffractive slope ring type peripheral defocus spectacle lens, hereinafter referred to as such spectacle lens.
FIG. 1 shows schematically: the central refraction area 1 is located in the central area of the spectacle lens, extends upwards and downwards to form an upwards and downwards opening window, the diffraction area is located on the nose side NS and is a nose side peripheral diffraction area 3, the diffraction area is located on the temple side TS and is a temple side peripheral diffraction area 4, the diffraction area is set to be a fan-shaped ring 7, a diffraction area 8 is arranged in the diffraction area, a diffraction slope ring 10, the width 11 of the diffraction slope ring and the height 12 of the diffraction slope ring are arranged in the diffraction area 8, and a partial microscopic amplification schematic diagram is shown, the spectacle lens can be provided with a substrate nose side triangular prism 17 in the lower side area of the central refraction area 1, so that a front face and amplification structure schematic diagram of the fan-.
FIG. 2 schematically shows: the central refraction area 1 is positioned in the central area of the spectacle lens and is provided with a perfect circle or an ellipse, the peripheral diffraction area 2 is provided with a full ring 5, and an enlarged structure schematic diagram of the full ring diffraction slope ring type peripheral out-of-focus spectacle lens is formed, as shown in fig. 2.
FIG. 3 schematically shows: the central refraction area 1 is located in the central area of the spectacle lens and is arranged in a perfect circle or an ellipse, the diffraction distinguishing boundary line 9 is arranged above the vertical meridian of the peripheral diffraction area 2, the peripheral diffraction area 2 is divided into two areas of the nasal side and the temporal side, the nasal side peripheral diffraction area 3 is located on the nasal side NS, the temporal side peripheral diffraction area 4 is located on the temporal side TS, and the peripheral diffraction area 2 is arranged in a semi-annular shape 6, so that an amplification structure schematic diagram of the semi-annular diffraction slope ring type peripheral out-of-focus spectacle lens is formed, as shown in fig. 3.
FIG. 4 is a schematic representation of: the central refraction area 1 and the peripheral diffraction area 2 are arranged on the front lens surface 14 of the spectacle lens to form an enlarged structural schematic diagram of the front lens surface diffraction slope ring type peripheral out-of-focus spectacle lens, as shown in figure 4.
FIG. 5 is a schematic representation of: the central refraction area 1 and the peripheral diffraction area 2 are arranged on the rear lens surface 15 of the spectacle lens to form an enlarged structural schematic diagram of the rear lens surface diffraction slope ring type peripheral out-of-focus spectacle lens, as shown in fig. 5.
FIG. 6 schematically shows: the central refractive region 1 and the peripheral diffractive region 2 are embedded in the spectacle lens matrix 16 to form an enlarged structure diagram of the diffraction slope ring type peripheral out-of-focus spectacle lens embedded in the matrix, as shown in fig. 6.
FIG. 7 is a schematic representation of: the cross section microscopic magnification diagram of the diffraction slope ring width 11 and the diffraction slope ring height 12 of the central refraction area 1 and the diffraction area 8 forms the magnification structure diagram of the cross section of the central refraction area and the peripheral diffraction area, as shown in fig. 7.
FIG. 8 is a schematic view of: the diffraction slope ring 10 is provided with a local microscopic magnification schematic diagram of the diffraction slope ring width 11, the diffraction slope ring height 12 and the diffraction slope ring included angle 13, and a local magnification structural schematic diagram of the diffraction slope ring is formed, as shown in fig. 8.
FIG. 9 is a schematic view of: the central refraction zone 1 and the plurality of diffraction slope rings 10, wherein the widths 11 of the diffraction slope rings R3, R4 and R5 are smaller than the widths 11 of the diffraction slope rings R1 and R2, the diffraction slope rings are numbered in sequence from the center to the periphery according to the set number of the diffraction slope rings, only 5 diffraction slope rings are used as an example in FIG. 9 for explaining the widths of the diffraction slope rings, n diffraction slope rings R1 can be designed, the smaller the number of the diffraction slope rings closer to the center is, the larger the number of the diffraction slope rings closer to the periphery is, and an enlarged structure schematic diagram that the widths of the diffraction slope rings R1 and R2 are larger than those of the diffraction slope rings R3, R4 and R5 is formed.
FIG. 10 schematically shows: the diffraction slope rings 10 of the central refractive region 1 and the peripheral diffraction region 2 are focused 18 for imaging, forming an imaging schematic diagram of the diffraction slope rings of the central refractive region and the peripheral diffraction region, as shown in fig. 10.
The diffraction slope ring-shaped peripheral out-of-focus spectacle lens is a frame spectacle lens. The lens surface type comprises a central refraction area and a peripheral diffraction area. The central zone of the spectacle lens is a central refractive zone for correcting the myopia central myopic defocus of the retina, and is a refractive spectacle lens. The refraction type spectacle lens has high refractive index and clear focusing imaging, and is the first choice design of the spectacle lens. The peripheral area is a peripheral refraction area for correcting hyperopic defocusing at the periphery of the retina of the myopic eye, a plurality of focus points are required to be designed, and the peripheral diffraction area is manufactured by selecting a diffraction step optical technology on the basis of ensuring the definition of focused imaging, so that the clear imaging is realized and the multifocal effect is designed. The lens diffraction optical element is designed in a slope ring mode, so that the lens is called a diffraction slope ring type peripheral out-of-focus lens.
The peripheral diffraction zone is divided into a full annular peripheral diffraction zone, a semi-annular peripheral diffraction zone and a fan-shaped annular peripheral diffraction zone according to the shape and the occupied circumferential azimuth angle. The central refraction area of the full annular diffraction slope annular peripheral out-of-focus spectacle lens is positioned in the central area of the spectacle lens and is set to be in a perfect circle or an ellipse. The peripheral diffraction zone is set to be a 360-degree circumferential azimuth angle, each diffraction slope ring is set with an equal or unequal positive addition value, and the full-annular diffraction slope ring type peripheral out-of-focus spectacle lens is manufactured. The full annular peripheral diffraction zone adopts an equivalent positive addition value, is more suitable for the batch processing of the car room lenses, but is not suitable for the processing of the individual customized spectacle lenses. Each diffraction slope ring in the full-ring-shaped peripheral diffraction zone adopts an unequal positive value, accords with the law that the peripheral refraction of the retina of the myopic eye gradually increases from the center to the periphery, but cannot correct the peripheral refraction error of the retina at the nasal temporal side, and is still not suitable for processing the individual more-precise customized spectacle lenses.
The semi-annular and fan-annular peripheral diffraction zones are arranged as a nasal side peripheral diffraction zone and a temporal side peripheral diffraction zone. The central refraction zone of the semi-annular diffraction slope ring-shaped peripheral out-of-focus spectacle lens is positioned in the central area of the spectacle lens and is arranged into a perfect circle or an ellipse, the peripheral diffraction zone is provided with a diffraction zone boundary line along the vertical diameter line of the optical center, the peripheral diffraction zone is provided with two nasal and temporal areas, each area occupies 180 degrees of circumferential azimuth, the peripheral diffraction zone on the nasal side is the peripheral diffraction zone on the nasal side, and the peripheral out-of-focus spectacle lens on the temporal side is positioned on the temporal side, so that the semi-annular diffraction slope ring-shaped peripheral out-of. The peripheral diffraction zone is set to be in a semi-annular shape, so that peripheral refractive error of the retina at the nasal temporal side can be accurately corrected, and the lens is suitable for processing of individual accurate customized spectacle lenses. The upper and lower regions of the central refractive region of the full and semi-annular peripheral diffractive regions are covered by the peripheral diffractive regions, resulting in a relatively narrow central field of view and also limiting the lower region to produce a compound prism.
The central refraction area of the fan-shaped annular diffraction slope annular peripheral defocused spectacle lens extends upwards and downwards to form an upwards-downwards opening window type or a downwards-opening window type, the peripheral diffraction area is provided with two areas, the nasal side and the temporal side respectively occupy circumferential azimuth angles of more than or equal to 90 degrees and less than or equal to 180 degrees, the nasal side peripheral diffraction area is positioned on the nasal side, the temporal side peripheral diffraction area is positioned on the temporal side, and the circumferential azimuth angle of the periphery of the fan-shaped annular diffraction slope annular peripheral defocused spectacle lens is 10-20 degrees larger than that of the central peripheral diffraction area. The main visual field range of human eyes is located horizontal and vertical meridian, the design of the fan-shaped peripheral diffraction zone and the up-and-down window type of the central refraction zone are more in line with the physiological fixation requirement of human eyes, and the lower side area of the central refraction zone is also beneficial to preparing the composite triple prism.
The peripheral diffraction zone occupies a circumferential azimuth angle according to the total angle, the full annular peripheral diffraction zone occupies a circumferential azimuth angle of 360 degrees, the semi-annular peripheral diffraction zone occupies a circumferential azimuth angle of 180 degrees, and the nasal temporal side of the fan-shaped peripheral diffraction zone respectively occupies a circumferential azimuth angle of more than or equal to 90 degrees and less than or equal to 180 degrees.
The peripheral diffraction zone is provided with 5 to 60 concentric axis diffraction slope rings, preferably 10 to 30 concentric axis diffraction slope rings, and the diffraction slope rings are also called wave rings and diffraction rings. A plurality of diffraction ramp rings are designed in order to gradually assign a refractive power positive value to each diffraction ramp ring, forming a dioptric step.
The diffraction slope ring is set to have a width of 5nm to 2mm and a height of 0, 1nm to 16 μm, preferably 10 μm to 1mm and a height of 10nm to 10 μm, more preferably 100 μm to 700 μm and a height of 1 μm to 8 μm. The width and height of the diffraction slope ring are set to be millimeter level, micron level and nanometer level, and the micron level is preferred. The nanometer level manufacturing process is precise and limits the batch production.
The steep side of the diffraction slope ring faces the optical center, and the gentle side is far away from the optical center. The diffraction slope ring is just like a peak, and has a steep side, a mountain top and a flat side, the slope close to one side of the optical center is relatively steep and is similar to the vertical height, but the diffraction slope ring adopts the micro-nano design, the height and the micro-scale level thereof, and the slope far away from one side of the optical center is very gentle. The plurality of diffraction slope rings are arrayed from the center to the periphery and are more like a series of saw teeth or peaks, the steep side of each diffraction slope ring is like a steep slope, the highest point of each diffraction slope ring is like a peak, and the gentle side of each diffraction slope ring is like a flat slope. The included angle of the diffraction slope ring is formed by the intersection of the width and the height of the diffraction slope ring, the steep side and the gentle side of the diffraction slope ring, the included angle faces to the optical center or faces away from the optical center, the included angle of the diffraction slope ring is set to be less than 5 degrees, the included angle is preferably selected to be less than or equal to 4 degrees, and the prism effect is generated when the included angle of the diffraction slope ring is too large.
And the two adjacent diffraction slope rings are in gapless connection or have a distance of 0.05mm to 0.25 mm. The same diffraction slope ring is provided with the same circumference azimuth angle, the same width and the same height. Or a diffraction ramp ring may be divided into a plurality of small segments, for example, in quadrants.
The cross sections of the diffraction slope rings are in a sawtooth shape which is connected in a convex-concave mode, the refractive power of the peripheral diffraction region relative to the refractive power of the central refraction region is a positive value, the width and the height of each diffraction slope ring are gradually reduced from the center to the periphery, the number of the slope rings is increased, the positive value of the peripheral diffraction region is increased, and the gradual diffraction stepped design is more suitable for the increasing trend of the refractive power of the retina from inside to outside.
The width, height and number of the diffraction slope rings determine the diffraction step diopter number, and the width of the diffraction slope rings determines the area of the diffraction slope rings and also determines the refractive power. The larger the width of the diffraction ramp ring, the farther the focus of the secondary wave is, the smaller the refractive power is, or the smaller the positive addition value is. The smaller the width of the diffraction ramp ring, the closer the focus of the secondary wave is, the greater the refractive power, or the greater the positive addition value. The width of the diffraction slope ring is used to design the size of the focal position power to be formed.
The design principle of the Zeiss trifocal intraocular lens is that according to the diffraction step progressive technology, the refractive power equation is as follows: d ═ 2 λ × pi/a. Wherein: d represents refractive power; λ represents a set wavelength; x represents a multiplication; pi represents a circumferential ratio; the/represents the equation semicolon; a represents the diffraction ring area. The calculation of the refractive power equation of the Zeiss trifocal intraocular lens is mainly related to the area of the diffraction ring, and other methods can not be used as parameter calculation, so that the direct correlation between the width of the diffraction ring and the area and refractive power of the diffraction ring is shown.
The height of the diffraction slope rings determines the energy distribution of the secondary waves, the heights of the diffraction slope rings are different, so that the optical path of light rays passing through different diffraction structures is changed, the higher the height of the diffraction slope rings is, the more the proportion of the light rays distributed to the near part is, the smaller the formed refractive power is, or the positive addition value is smaller. The lower the diffraction slope ring height, the greater the proportion of light rays allocated to far away, the greater the resulting optical power. The width and height of the diffraction slope ring of the peripheral diffraction zone are smaller and lower, and the refractive power of the peripheral diffraction zone is increased. The diffraction ramp ring area is understood to be the area of the annular strip sandwiched by the two diffraction ramp rings, or the area between the two rings.
The smaller the number of diffraction slope rings and the smaller the refractive power formed, the larger the number of diffraction slope rings and the larger the refractive power formed. The diffraction slope rings closer to the periphery have smaller width, lower height and more number, so that the positive value of the peripheral diffraction zone can be increased, and the hyperopic defocus on the periphery of the retina of 40 degrees can be corrected.
Two adjacent diffraction slope rings are arranged in a refraction progressive mode, the peripheral diffraction zone is provided with 5 refraction levels, the diffraction slope rings are arranged on the front mirror surface and the rear mirror surface of the spectacle lens or embedded in a spectacle lens matrix, and the embedding in the spectacle lens matrix is also called as a sandwich mode. At least the diffraction slope ring of the spectacle lens is designed on one of a front mirror surface, a rear mirror surface and a sandwich type, the diffraction slope ring is preferably arranged on the front mirror surface of the spectacle lens, and the rear mirror surface is formed into an aspheric surface by adopting a garage technology.
The blank sheet or the spectacle lens is composed of one, two, three or four layers, the thickness of the composite layer or the coating layer is more than or equal to the height of the diffraction slope ring, and the aim is to cover the whole height of the diffraction slope ring so that the appearance of the diffraction slope ring is not obvious in a convex-concave mode. The difference value of the refractive power gradient of the central refraction area and the peripheral diffraction area is +/-0.01D-0.25D, the difference value of the refractive power gradient is preferably +/-0.05D-0.15D, and the difference value of the lower refractive power gradient can control the refractive power precise stepping of the spectacle lens and has high manufacturing tolerance, thereby being beneficial to the individual precise processing of the spectacle lens.
The central refraction area range is closely related to the central visual field and the peripheral diffraction area range, the peripheral diffraction area range is too narrow and cannot effectively correct myopic retina peripheral hyperopic defocusing due to the overlarge central refraction area, and the central visual field range is too narrow and too small due to the undersize central refraction area. The central refracting area of the spectacle lens is arranged along the horizontal radial line of the optical center with the length of 8mm to 16mm, preferably 9mm to 12 mm.
The central refraction area corrects the myopia retina central myopic defocus, an aspheric surface is arranged, the refractive power is customized to be 0.00D to-10.00D and the astigmatism is less than or equal to 4.00DS according to the subjective and objective refraction refractive power of an individual lens dispenser. The astigmatism degree of the spectacle lens is more than 4.00DS, and the curative effect of controlling the myopia of children and teenagers by adopting the frame spectacle lens is limited.
The central refraction area of the spectacle lens is set to be 0.00D, and the spectacle lens aims to be suitable for children with reduced or insufficient hypermetropic reserve power, people wearing cornea shaping glasses and having hereditary myopia and distance vision of 1.0 by one or both parents, prevent the myopia people from wearing the spectacle lens, prevent the central vision from being influenced by the far vision and the near vision of the central refraction area, and reduce the hypermetropic defocusing phenomenon caused by the near vision by the peripheral diffraction area at the nose-temporal side. The short-time hyperopic defocus phenomenon can be generated when the near vision time of the human eyes exceeds 30 minutes, and the central refraction area is set to be a 0.00D peripheral defocus spectacle lens and is more suitable for preventing the occurrence and the development of near vision. The central refraction area is set to be 0.00D of peripheral out-of-focus spectacle lenses, and the additional spectacles can be prepared for wearing in near vision.
The lower area of the central refraction area is provided with a base 0.5 delta to 6.0 delta triangular prism lens facing to the nose, and the base facing to the nose also means that the base faces to the inner side, so that the eye concentration in near vision is relieved. The lower side area of the central refraction area is provided with a 0.5 delta to 3.0 delta triangular prism lens with a base facing to the lower side, and the purpose is to eliminate prism effect generated in the manufacturing process of the spectacle lens.
From 10mm away from the optical center to the peripheral position of the spectacle lens, the width of each diffraction slope ring is gradually reduced by 10 mu m to 0.1mm, the height of each diffraction slope ring is reduced by 5nm to 5 mu m, and the number of diffraction slope rings is gradually increased, so that the positive value is gradually increased. And dividing the total positive value of the peripheral diffraction zones by the number of diffraction slope rings at the positions of 10mm to 20mm, and adding the average positive value into each diffraction slope ring.
The peripheral diffraction zone is at least 20mm from the optical center and has a power greater than that of the central refractive zone by 0.50D to 5.00D. The peripheral 40 degrees of the nasal temporal retina has the maximum relative hyperopic refractive value and corresponds to the position 20mm away from the optical center of the spectacle lens, so that the nasal side diffraction area and the temporal side diffraction area are at least 20mm away from the optical center, the refractive power is set to be 0.50D to 5.00D greater than that of the central refractive area, and the purpose is to correct hyperopic defocus which causes the occurrence and the development of myopic eyes by sufficient refractive power. The design range of the central refraction area is closely related to the visual field range and the nasal-temporal side diffraction area range, the central refraction area is too large, the nasal-temporal side diffraction area range is too small, on the contrary, the central vision range is narrow due to too small design of the central refraction area, the length of the central refraction area at least along the horizontal radial line of the optical center is set to be 8mm to 16mm, and the length of the horizontal radial line is preferably set to be 9mm to 12 mm.
The retina periphery Refraction detection is a golden standard for the occurrence and development of myopia power, and can accurately and quantitatively evaluate the retina periphery Relative Refraction (RPR), and the Refraction state of each vision field angle of the retina periphery Relative to the fovea, namely the difference value of the equivalent sphere lens value of each vision field angle and the dioptric power of the fovea. The relative inflection of the retina periphery in each quadrant is as follows: superior retinal peripheral refraction, inferior retinal peripheral refraction, nasal retinal peripheral refraction, temporal retinal peripheral refraction. Horizontal radial line retinal peripheral refraction, including nasal retinal peripheral refraction and temporal retinal peripheral refraction, is a major causative factor in myopia, among which: the relative refraction of the temporal retina periphery is a main factor, the refractive error of the nasal temporal retina is a main factor, and the correction of the temporal retina periphery defocus and the correction of the nasal temporal retina periphery refractive error are main measures for controlling the occurrence and the development of myopia. Usually, the peripheral retina refraction of 40 degrees is used as the hyperopic maximum defocus, and the nasal side diffraction area is larger than the temporal side diffraction area by 0.50D to 2.00D as the correction.
The peripheral area of the front lens surface of the spectacle lens is provided with a peripheral diffraction area, the peripheral area of the rear lens surface is provided with a peripheral refraction progressive addition value, and the combined refractive power of the peripheral area of the front lens surface and the peripheral area of the rear lens surface is larger than the refractive power of the central refraction area by 0.50D to 5.00D.
The spectacle lens has the nose-side peripheral diffraction area for correcting hyperopic defocus on the temporal side of the myopic eye, and the temporal-side peripheral diffraction area for correcting hyperopic defocus on the nasal side of the myopic eye, wherein the plane refractive powers of the nose-side peripheral diffraction area and the temporal-side peripheral diffraction area relative to the central refraction area are positive addition values, and the refractive power of the nose-side peripheral diffraction area is 0.50D-3.00D larger than that of the temporal-side peripheral diffraction area. The positive addition value is a value obtained by adding a relative convex Power (add Power) to the refractive Power of the central refractive area, and is called a positive addition value because the relative convex Power is a positive addition value. The refractive powers of the nasal side peripheral diffraction area and the temporal side peripheral diffraction area of the spectacle lenses are customized according to the nasal temporal side retina peripheral refraction detection power of an individual lens dispenser, or N + N: t + n, 5 secondary positive values, where: n + N represents the positive addition value of the peripheral diffraction zone on the nose side, T + N represents the positive addition value of the peripheral diffraction zone on the temporal side, and N represents the positive addition value degree of the specific peripheral diffraction zone; respectively as follows: n + 1.00D: t + 0.50D; n + 2.00D: t + 1.25D; n + 3.00D: t + 2.0D; n + 4.00D: t + 2.75D; n + 5.00D: t +3.50D, and the 5 secondary positive values respectively correspond to the five myopic eye refractive powers of 0.00D to-2.00D; -2.01D to-3.00D; -3.01D to-4.00D; -4.01D to-6.00D; the refractive power of the full annular peripheral diffraction zone is more than or equal to-6.01D, and the 5 secondary positive values respectively correspond to the refractive powers of five myopes from 0.00D to-2.00D according to the positive values of 1.00D, 2.0D, 2.50D, 3.00D and 3.75D; -2.01D to-3.00D; -3.01D to-4.00D; -4.01D to-6.00D; more than or equal to-6.01D, for children and teenagers with myopia onset earlier than 12 years old, the annual increase is more than 1.00D, and both parents or one party are high myopia, on the basis of 5 secondary positive values, respectively increasing N + 0.75D: t + 0.50D. The refractive power of the nasal side peripheral diffraction area and the temporal side peripheral diffraction area of the spectacle lens is preferably detected by selecting the nasal side retinal peripheral refraction detection power of an individual spectacle dispenser, and a positive addition value is added according to the inducing factors such as the onset age of the individual spectacle dispenser, the degree progression speed, whether parents are high myopia and the like.
The height of the diffraction slope ring of the spectacle lens is less than 10 mu m, and the diffraction zone has zero prism degree. The height of the diffraction slope ring is designed in a micron or nanometer scale, the diffraction slope ring is not a prism, and the diffraction slope ring cannot generate a prism effect, so that the prism effect can be ignored. The width of the diffraction slope ring is designed to be millimeter-sized, micron-sized and nanometer-sized, the height of the diffraction slope ring is preferably designed to be micron-sized and nanometer-sized, the height of the diffraction slope ring is more preferably designed to be micron-sized, the height of the diffraction slope ring is designed to be less than 16 mu m, the height of the diffraction slope ring is preferably selected to be less than or equal to 10 mu m, and the phenomenon that the height of the diffraction slope ring is too high to generate a prism effect.
The diffraction step is designed to have a steep side surface and a flat side surface, and is designed to be annular, or the annular is divided into quadrant type, or divided into a plurality of independent diffraction circles, ellipses, semicircles, triangles, rectangles and squares. The ophthalmic lens corrects at least optical signals at wavelengths between 510nm and 610nm, preferably 550 nm.
The preparation method of the spectacle lens comprises the following steps:
a. a raw material of polycarbonate or polyurethane with refractive indexes of 1.49, 1.56, 1.60, 1.67, 1.71, 1.74 and Abbe numbers of 30 to 43 is injected into a mold with a front mirror surface provided with a peripheral diffraction area or a nasal side peripheral diffraction area and a temporal side peripheral diffraction area, a qualified blank sheet is prepared through the procedures of curing, demolding, edging, cleaning, hardening and film adding, the blank sheet is placed on a numerical control garage, the refractive power of a central refraction area is customized according to the myopic eye diopter number of an individual lens dispenser, and a diffraction slope ring type peripheral defocusing spectacle lens with a diffraction slope ring arranged on the front mirror surface is prepared through upper disc, grinding, polishing, lower disc, hardening and film plating.
b. The surface of the optical plastic film is molded into a central refraction area and a peripheral diffraction area or a nose side peripheral diffraction area and a temporal side peripheral diffraction area by hot press molding, solvent etching molding and laser engraving, after the optical plastic film is molded into a base curve, the optical plastic film is embedded into a mold between two layers of resin monomers and is heated and cured for molding, and the diffraction slope ring type peripheral defocused spectacle lens with the diffraction slope ring arranged in the spectacle lens matrix is manufactured.
c. Adopt soft transparent plastic polymer material, adopt centrifugal casting shaping, the shaping is ground in the cutting, direct compression molding, make the outer mirror surface of thickness 0.5mm to 2.0mm for the plane of refraction, the inner mirror surface is the plane of flat light paste, outer mirror surface central zone sets up the central refraction district to zero diopter, peripheral zone sets up to 360 equivalent positive value complete ring, or set up to nose temporal side unequal positive value's nose side peripheral diffraction district and temporal side peripheral diffraction district, paste the face and paste on the frame lens, make the peripheral out of focus lens of flexible pressure pasting diaphragm type diffraction slope ring type.
d. The blank sheet or the spectacle lens is composed of one, two, three or four layers from the surface to the inner layer, wherein the viscosity of one layer of photohardening resin in an unhardened state of the two layers is more than 40cP, the viscosity of the other layer of photohardening resin in an unhardened state is more than 2000cP, the first layer and the second layer are provided with a central refraction region, the third layer or the fourth layer is provided with a peripheral diffraction region, the thickness of a composite layer or a coating layer is more than or equal to the height of a diffraction slope ring, and the thickness is equal to 5nm to 16 mu m.
The invention provides a diffraction slope ring type peripheral defocused spectacle lens, which adopts a diffraction step technology, wherein a diffraction optical element is a slope ring, and the peripheral hyperopic defocusing of the retina of a myopic eye is corrected by adjusting the refractive power of a peripheral diffraction area from the center to the periphery and forming different focusing positions by utilizing the width, the height and the number of different diffraction slope rings, so that clear vision and visual field are ensured, unexpected technical effects are generated, and the diffractive slope ring type peripheral defocused spectacle lens has prominent substantive characteristics and remarkable progress.
Finally, it should be clarified that: the design parameter changes and modifications to the central refractive zone, peripheral diffractive zone, nasal peripheral diffractive zone, temporal peripheral diffractive zone, diffractive ramp ring described in the present invention are also within the definition of the present claims.
Claims (10)
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| CN113996936A (en) * | 2021-09-28 | 2022-02-01 | 视立美视光科技集团(西安)有限公司 | Digital laser engraving process for defocused lens |
| CN114415394A (en) * | 2021-11-09 | 2022-04-29 | 阿尔玻科技有限公司 | A kind of spectacle lens with defocus function and preparation method thereof |
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| CN113296290A (en) * | 2021-05-24 | 2021-08-24 | 苏州明世光学科技有限公司 | Multipoint out-of-focus spectacle lens patch and pasting method thereof |
| CN113296289A (en) * | 2021-06-06 | 2021-08-24 | 段亚东 | Double-mirror double-positive value individualized out-of-focus spectacle lens |
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| CN113996936A (en) * | 2021-09-28 | 2022-02-01 | 视立美视光科技集团(西安)有限公司 | Digital laser engraving process for defocused lens |
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| EP4390516A1 (en) * | 2022-12-23 | 2024-06-26 | Carl Zeiss Vision International GmbH | Spectacle lens design data and method for manufacturing a spectacle lens |
| EP4390517A1 (en) * | 2022-12-23 | 2024-06-26 | Carl Zeiss Vision International GmbH | Spectacle lens design data and method for manufacturing a spectacle lens |
| WO2024132632A1 (en) | 2022-12-23 | 2024-06-27 | Carl Zeiss Vision International Gmbh | Spectacle lens design data and method for manufacturing a spectacle lens |
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| WO2024132653A3 (en) * | 2022-12-23 | 2024-08-02 | Carl Zeiss Vision International Gmbh | Spectacle lens design data and method for manufacturing a spectacle lens |
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