CN111752008A - Progressive multifocal lens set - Google Patents
Progressive multifocal lens set Download PDFInfo
- Publication number
- CN111752008A CN111752008A CN202010714754.9A CN202010714754A CN111752008A CN 111752008 A CN111752008 A CN 111752008A CN 202010714754 A CN202010714754 A CN 202010714754A CN 111752008 A CN111752008 A CN 111752008A
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- Prior art keywords
- lens
- lenses
- progressive
- degree change
- resin
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- 230000000750 progressive effect Effects 0.000 title claims abstract description 28
- 229920005989 resin Polymers 0.000 claims abstract description 13
- 239000011347 resin Substances 0.000 claims abstract description 13
- 230000003247 decreasing effect Effects 0.000 claims abstract description 5
- 239000013078 crystal Substances 0.000 claims description 6
- 239000011521 glass Substances 0.000 abstract description 11
- 239000000463 material Substances 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000003287 optical effect Effects 0.000 description 11
- 239000004417 polycarbonate Substances 0.000 description 7
- 239000002253 acid Substances 0.000 description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 3
- 239000004926 polymethyl methacrylate Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000011265 semifinished product Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 150000002009 diols Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000006068 polycondensation reaction Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 229920006337 unsaturated polyester resin Polymers 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000005252 bulbus oculi Anatomy 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
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- 238000005260 corrosion Methods 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 210000001508 eye Anatomy 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 230000005226 mechanical processes and functions Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 229920006305 unsaturated polyester Polymers 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/08—Auxiliary lenses; Arrangements for varying focal length
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
- G02B1/041—Lenses
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Health & Medical Sciences (AREA)
- Eyeglasses (AREA)
Abstract
The invention discloses a progressive multi-focus lens group, which relates to the technical field of lenses and comprises an inner lens and an outer lens, wherein the inner lens and the outer lens can move up and down relatively so as to change the degree change of a coincident surface; and the degree change is uniformly increased or uniformly decreased when the inner and outer lenses do up-and-down relative motion. The invention realizes the production of the resin lens through the glass mold, has simple production, can flexibly switch and select tree finger materials with different refractive indexes to produce different varieties, and has low investment of mold cost; the resin lens is easy to process and dye in the process of lens assembly. The lens group can be used for multiple purposes by one lens and can be used as an emergency backup in case of damage or loss of the glasses.
Description
Technical Field
The invention relates to the technical field of lenses, in particular to a progressive multi-focus lens group.
Background
Glass lens: the glass lens is divided into a white sheet and a red sheet, and the white sheet and the red sheet are respectively provided with a film and a non-film. Glass is best resistant to abrasion but is fragile and glass lenses are heavy and uncomfortable to wear. So that few people are used at present, and the other lenses are generally selected to replace the lenses.
PC lens: the PC lens is also called space sheet and world sheet, has a chemical name of polycarbonate and is a thermoplastic material. The PC lens has the advantages of light weight, high impact strength, high hardness, high refractive index, excellent mechanical function, good thermoplasticity, excellent electric insulation function, no environmental pollution and the like, is also a special driver lens, but is easy to corrode.
Most of PC sheets sold in the market at present are light, strong in impact resistance and high in equipment requirement in production, so that the PC sheets are expensive, and are difficult to process during assembly due to material properties.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a progressive multifocal lens group, which solves the problems that most of PC sheets sold in the market at present are light, strong in shock resistance, high in equipment requirement in production, expensive in price and difficult to process during assembly due to material properties.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a progressive multifocal lens group comprises an inner lens and an outer lens, wherein the inner lens and the outer lens can move up and down relatively so as to change the degree change of a superposed surface; and the degree change is uniformly increased or uniformly decreased when the inner and outer lenses do up-and-down relative motion.
Preferably, the inner and outer double lenses move by the same distance, and the change values of the distance degrees are the same.
Preferably, the inner and outer double lenses are made of any one of resin lenses, crystal lenses or MR lenses.
Furthermore, when the inner and outer lenses move up and down, the luminosity span is in the range from +3.00 to-6.00, and the total stroke is 8 mm.
Furthermore, the inner and outer double lenses are free-form surface lenses.
(III) advantageous effects
The invention provides a progressive multifocal lens group, which has the following beneficial effects:
1. the invention realizes the production of the resin lens through the glass mold, has simple production, can flexibly switch and select tree finger materials with different refractive indexes to produce different varieties, and has low investment of mold cost; the resin lens is easy to process and dye in the process of lens assembly.
2. The lens group can be used for multiple purposes by one lens and can be used as an emergency backup in case of damage or loss of the glasses.
Drawings
FIG. 1 is a schematic view of the inner and outer lenses of the present invention in their fully-aligned configuration;
FIG. 2 is a schematic view of the outer lens of the present invention moving upward by a power of + 3.00;
FIG. 3 is a schematic view of the outer lens of the present invention moving downward to a lens power of-6.00;
FIG. 4 is a schematic diagram of the power distribution of the inner and outer lenses according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-4, the present invention provides a technical solution: a progressive multifocal lens group comprises an inner lens and an outer lens, wherein the inner lens and the outer lens can move up and down relatively so as to change the degree change of a coincident surface; and the degree change is uniformly increased or uniformly decreased when the inner and outer lenses do up-and-down relative motion. The inner and outer double lenses are made of any one of resin lenses, crystal lenses or MR lenses, and the abrasion-proof, blue-light-proof, antifogging and optical pollution values reach the national standard or approach the national standard (12 degrees).
Wherein, the resin lens: the resin lens is an optical lens using resin as a material. Light weight and wear resistance, the light transmittance can reach 98 percent after being coated, the shock resistance is strong, the luminosity range is wide, and the requirement of common eyes can be met. Due to its particular chemical structure and its potential for use as such latex paints and glues, attention is paid to.
Wherein, the crystal lens: as an optical material, the greatest advantage of crystal is high hardness, and the manufactured lens is not easy to wear. Crystal lenses were once prevalent in the 20-30 s of this century, and the lenses made were durable.
Wherein the MR lens: the MR lens is a high-refractive-index lens material with the most balanced performance indexes, is particularly suitable for producing spectacle lenses, is light and thin, has clear vision and high pressure resistance, is not easy to damage, and is not easy to turn yellow, clear and bright for a long time and very good in corrosion resistance compared with the common lens.
As a preferred technical scheme of the invention: the inner and outer double lenses move the same distance, and the degree change values are the same.
As a preferred technical scheme of the invention: the inner and outer lenses can be made of resin acrylic materials, the lens effect is high, and the light transmittance is good; acrylic acid: the scientific name polymethyl methacrylate (PMMA) is organic glass which is commonly called. The product has good transparency and high hardness, and is one of plastics. Hong Kong people are mostly called sub-stressing, are important thermoplastics which are developed earlier, have better transparency, chemical stability and weather resistance, are easy to dye and process, have beautiful appearance and are widely applied to the building industry. Organic glass products can be generally classified into cast sheets, extruded sheets and molding compounds. The melting point of MMA is low: the melting point of PMMA is much lower at about 130 ℃ and 140 ℃ (265 ℃ and 285 ℃ F.) than at about 1000 ℃ for glass. The resin is unsaturated polyester resin, belonging to thermosetting plastics. Also known as AB glue, is produced from liquid resin curing agents. The saturated polyester resin is generally a linear polymer compound having an ester bond and an unsaturated double bond, which is obtained by polycondensation of an unsaturated dibasic acid diol or a saturated dibasic acid unsaturated diol. Generally, the polyesterification polycondensation reaction is carried out at 190-220 ℃ until the expected acid value (or viscosity) is reached, and after the polyesterification reaction is finished, a certain amount of vinyl monomer is added while the reaction is hot to prepare viscous liquid, and the polymer solution is called unsaturated polyester. The heat distortion temperature of most unsaturated polyester resins is 50-60 ℃. .
As a preferred technical scheme of the invention: when the inner and outer double lenses move up and down, the luminosity span is in the range of +3.00 to-6.00, and the total stroke is 8 mm.
As a preferred technical scheme of the invention: the inner and outer double lenses are FREE-FORM surface type lenses, and the so-called FREE-FORM surface (FREE-FORM) technology is used for processing the surface of the asymmetric complex optical design. In recent years, this technology has become more widely used in the international high-end ophthalmic lens industry. Firstly, roughly processing the surface by using an artificial diamond cutter, then finely grinding the surface by using a natural diamond single-point cutter, and finally polishing by using a numerical control flexible polishing machine tool; typically, the asymmetric complex surface profile that is compression molded using a mold is present on the anterior surface of the lens, while the posterior surface is finished to the lens prescription using conventional grinding equipment. For example, a conventional progressive addition lens (outer progressive) is known to be manufactured using a similar method: the progressive multi-focus mould is used on the front surface, the spherical mould is used on the rear surface to press an outer progressive semi-finished product, and then common car room equipment is used for processing the prescription power required by the lens on the rear surface of the semi-finished product. The complex surface profile ground by the single-point CNC machine tool is mostly present on the back surface of the lens, namely the front surface is pressed and formed by a mould, and the complex optical surface profile and the prescription degree of the lens are directly processed on the back surface. For example, in the current international high-end market progressive product, a front spherical light mold and a rear spherical light mold are used for pressing a spherical light semi-finished product, and then the progressive multi-focal surface type and the prescription power are processed on the rear surface of the lens by using free-form surface software. We refer to the latter type of complex surface lenses for vehicle room processing as FREE-FORM (FREE-FORM) lenses.
Compared with the traditional asymmetric complex surface lens with a profile pressed by a master mould, the novel free-form surface lens which directly grinds the complex optical profile on the rear surface of the lens by using free-form surface equipment has a plurality of obvious advantages. We talk below about the advantages of a free-form machined inner progressive lens over a conventional outer progressive addition lens:
1. the problem of limited field of view is also obviously improved;
moving the progressive design to the inner surface significantly enlarges the field of view of the zones of the lens, another factor affecting the field of view arises from the aspherical or astigmatic aspherical design of the rear surface. The aspheric design flattens the radius of curvature of the apex of the lens so that the lens can be brought closer to the eyeball, which is also an important factor in expanding the field of view.
2. The optical performance can be optimized to the best;
conventional progressive addition lenses take into account mold tooling and half-tablet inventory costs, and a forward curve is often provided with a significant amount of lens power. This means that the optimum optical performance of most lenses is sacrificed. The most ideal way to optimize the optical performance is: each degree corresponds to a different forward curve. Which is not possible with conventional progressive plates. Thus, a compromise must be made in the accuracy of the viewing object, the degree of deviation from optimum depending on how far the power of the lens deviates from the optimum power for its forward curve.
This is exactly the greatest advantage of the inner progressive lens, which, unlike the traditional outer progressive lenses, does not at all have to worry about the limited base curve and the inability to optimize optical performance. The front and back surfaces of the lens can be optimally matched in curvature, and the inner surface is provided with an aspheric surface or an astigmatic aspheric surface design, so that the definition of the object viewed by the lens is ensured to the maximum extent.
3. Personalized design becomes possible;
the inner progressive design can also be directly added with the design of pertinence such as the shape, the size, the interpupillary distance and the like of the spectacle frame in software, so that the optical performance of the spectacle lens is further optimized according to the personal condition of each person.
According to the working principle, in the progressive multi-focus lens group, the double lenses move up and down relatively, and the degree change range of the effective superposed surface is as follows; when the lens moves up and down relatively, the degree change is uniformly increased or decreased (the degree change values of the distance moving the same are the same), and the degree change can be accurate to 1D.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. A progressive multifocal lens set comprising an inner lens and an outer lens, characterized in that: the inner and outer lenses can move up and down relatively to change the degree change of the coincident surface; and the degree change is uniformly increased or uniformly decreased when the inner and outer lenses do up-and-down relative motion.
2. The set of progressive addition lenses of claim 1, wherein: the inner and outer double lenses move the same distance, and the degree change values are the same.
3. The set of progressive addition lenses of claim 1, wherein: the inner and outer double lenses are made of any one of resin lenses, crystal lenses or MR lenses.
4. The set of progressive addition lenses of claim 1, wherein: when the inner and outer double lenses move up and down, the luminosity span is in the range of +3.00 to-6.00, and the total stroke is 8 mm.
5. The set of progressive addition lenses of claim 1, wherein: the inner and outer double lenses are free-form surface lenses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010714754.9A CN111752008A (en) | 2020-07-23 | 2020-07-23 | Progressive multifocal lens set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010714754.9A CN111752008A (en) | 2020-07-23 | 2020-07-23 | Progressive multifocal lens set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111752008A true CN111752008A (en) | 2020-10-09 |
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ID=72710812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010714754.9A Pending CN111752008A (en) | 2020-07-23 | 2020-07-23 | Progressive multifocal lens set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111752008A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105527665A (en) * | 2016-02-18 | 2016-04-27 | 陈奎 | Lens with gradually-changed focus |
| CN106932921A (en) * | 2017-05-05 | 2017-07-07 | 上海理工大学 | Progressive additional free surface lens method of evaluating performance |
| CN206876978U (en) * | 2017-07-08 | 2018-01-12 | 周道红 | A kind of mobile progressive multi-focus lens group |
| CN207164385U (en) * | 2017-04-27 | 2018-03-30 | 陈奎 | For the non-equally change punktal lens straight burr monolithic in vision correction two lenses group |
| CN209417458U (en) * | 2018-08-28 | 2019-09-20 | 杭州电子科技大学 | Sandwich style Alvarez zoom intelligent glasses |
| CN110974643A (en) * | 2019-12-18 | 2020-04-10 | 江苏今视缘智能科技有限公司 | Intelligent glasses and algorithm thereof |
| CN212515256U (en) * | 2020-07-23 | 2021-02-09 | 江苏万新光学有限公司 | Progressive multifocal lens set |
-
2020
- 2020-07-23 CN CN202010714754.9A patent/CN111752008A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105527665A (en) * | 2016-02-18 | 2016-04-27 | 陈奎 | Lens with gradually-changed focus |
| CN207164385U (en) * | 2017-04-27 | 2018-03-30 | 陈奎 | For the non-equally change punktal lens straight burr monolithic in vision correction two lenses group |
| CN106932921A (en) * | 2017-05-05 | 2017-07-07 | 上海理工大学 | Progressive additional free surface lens method of evaluating performance |
| CN206876978U (en) * | 2017-07-08 | 2018-01-12 | 周道红 | A kind of mobile progressive multi-focus lens group |
| CN209417458U (en) * | 2018-08-28 | 2019-09-20 | 杭州电子科技大学 | Sandwich style Alvarez zoom intelligent glasses |
| CN110974643A (en) * | 2019-12-18 | 2020-04-10 | 江苏今视缘智能科技有限公司 | Intelligent glasses and algorithm thereof |
| CN212515256U (en) * | 2020-07-23 | 2021-02-09 | 江苏万新光学有限公司 | Progressive multifocal lens set |
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