Multi-band aspherical lens for golf sports and preparation method of multi-band aspherical lens

Abstract

The invention discloses a multi-band aspherical lens for golf sports and a preparation method thereof, and particularly relates to the technical field of optical components, the multi-band aspherical lens comprises a high-strength resin matrix, the refractive index of which is 1.58-1.62; the high-strength resin comprises a high-strength resin matrix and multiple functional molecules uniformly dissolved in the high-strength resin matrix, the distribution heterogeneity of the functional molecules in the matrix is less than 5%, and the multiple functional molecules comprise an ultraviolet light absorber used for blocking ultraviolet light with the wave band of 380-400 nm. According to the invention, various functional molecules are uniformly dissolved in a resin matrix and are molded into an aspheric structure in one step, so that the spectral performance and the structural reliability of the lens are synchronously improved, the interface reflection and delamination risks of a traditional multilayer film structure are fundamentally eliminated, the optical purity is ensured, the green light wave band of 490-570nm can be selectively enhanced, and the optical performance of the lens is improved. Meanwhile, interference yellow-green light and red light are accurately filtered, the visual contrast and definition of golf sports in the putting green interpretation process are improved, and the edge aberration is effectively eliminated in combination with the aspheric surface design.

Description

Technical Field

[0001] This invention relates to the field of optical components technology, and more specifically, to multi-band aspherical lenses for golf and their manufacturing methods. Background Technology

[0002] Golf places extremely high demands on visual equipment. Athletes need to quickly and accurately judge the outline, grass texture, and slope of distant greens in highly dynamic and complex lighting environments such as dawn, dusk, or strong sunlight. This requires professional lenses to not only provide basic UV protection but also to have precise spectral control capabilities to enhance visual contrast while ensuring a wide field of vision without distortion.

[0003] The traditional multi-layer coating technology currently used in golf lenses, while meeting the professional sports vision requirements, introduces multiple optical interfaces that cause complex reflections and scattering of light. This results in significant aberrations and visual distortions at the edge of the lens, affecting the accuracy of long-distance reading. Furthermore, existing technology focuses on blocking a broad spectrum of ultraviolet and blue light, lacking the ability to precisely enhance specific wavelengths, such as the crucial 490-570nm green light for green reading. This often leads to excessive attenuation of beneficial light, failing to effectively improve visual contrast. Additionally, there is a risk of poor adhesion between coating layers, making them prone to fogging and delamination due to environmental changes or wear, affecting lens lifespan. The complex coating process also results in high manufacturing costs. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a multi-band aspherical lens for golf and a method for manufacturing the same, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a multi-band aspherical lens for golf, comprising: High-strength resin matrix with a refractive index of 1.58 to 1.62; And a variety of functional molecules uniformly dissolved in the high-strength resin matrix, wherein the non-uniformity of the distribution of the functional molecules in the matrix is ​​less than 5%; The various functional molecules include: Ultraviolet absorbers are used to block ultraviolet rays in the 380nm to 400nm wavelength range. Blue light blocking agent, used to absorb blue light in the 400nm to 450nm wavelength range; 490nm-570nm green light enhancer, used to selectively enhance green light in the 490nm to 570nm wavelength range; 570nm-590nm filter, used to absorb yellow-green light in the 570nm to 590nm wavelength range; 620nm-780nm filter, used to absorb red to near-infrared light in the 620nm to 780nm wavelength band; The lens is an aspherical structure that is formed in one step using a mold.

[0006] Preferably, the high-strength resin matrix is ​​epoxy resin or polycarbonate resin.

[0007] Preferably, the 490nm-570nm green light enhancer comprises a complex of benzoxazole derivatives and naphthalimide fluorescent molecules.

[0008] Preferably, the 570nm-590nm filter is an azo compound, and the 620nm-780nm filter is a phthalocyanine metal complex.

[0009] Preferably, the lens has a transmittance gain greater than 25% in the 490nm to 570nm wavelength band and spectral interference ≤15%.

[0010] A method for manufacturing a multi-band aspherical lens for golf as described above includes the following steps: S1. Raw material pretreatment: Prepare high-strength resin matrix raw materials and the ultraviolet absorber, blue light blocking agent, 490nm-570nm green light enhancer, 570nm-590nm filter, and 620nm-780nm filter in proportion. S2. Vacuum mixing: The pretreated raw materials are subjected to high-speed shearing and stirring under vacuum conditions to completely dissolve the functional molecules in the resin matrix and form a uniform mixed solution. S3. Casting and molding: The mixed solution is injected into an aspherical mold for casting and molding to obtain a lens preform; S4. Curing and finishing: The lens preform is subjected to thermosetting treatment, followed by edge chamfering and polishing to obtain the multi-band aspherical lens.

[0011] Preferably, in the vacuum mixing step, the vacuum level is maintained at -0.09MPa to -0.1MPa, the stirring speed is 800 to 1200 rpm, and the mixing time is 30 to 60 minutes.

[0012] Preferably, in the casting step, the mold temperature is 25°C to 35°C; the temperature of the thermosetting treatment is 80°C to 100°C, and the curing time is 2 to 4 hours.

[0013] Preferably, in the raw material pretreatment step, the components are as follows by mass: 100 parts of high-strength resin matrix, 5-8 parts of ultraviolet absorber, 10-15 parts of blue light blocking agent, 8-12 parts of 490nm-570nm green light enhancer, 6-9 parts of 570nm-590nm filter, and 7-11 parts of 620nm-780nm filter.

[0014] Preferably, after the curing and finishing steps, a quality inspection step is also included to test the aspherical curvature and spectral transmission performance of the formed lens.

[0015] The technical effects and advantages of this invention are as follows: By achieving uniform molecular-level dispersion of multiple functional molecules in a liquid resin matrix through vacuum mixing, and then curing them in a single casting process using a mold, the integrated structure fundamentally eliminates interlayer interfaces, avoiding multiple reflections and scattering of light, as well as the risks of film peeling and fogging. This ensures efficient and pure light transmission. At the same time, the aspherical structure design effectively eliminates spherical aberration, making the edge field of view as clear as the center field of view. This solves the problem of visual blurring and distortion in the edge area of ​​traditional spherical lenses. Through the synergistic design of uniform fusion of functional molecules and integrated aspherical molding, the optical purity and visual distortion-free nature of the lens structure are achieved, providing the hardware foundation for the wide field of view and accurate judgment required for golf. By combining green light enhancers, yellow light filters, and red light filters, the brightness and contrast of the green light band of the grass are improved. At the same time, the glare of the yellow-green light band reflected from the water surface, sand bunkers and other environments is effectively suppressed, as well as long-wavelength light that may cause interference with depth perception. For the spectral environment of golf courses under specific lighting conditions, the light is selectively enhanced and selectively filtered in a coordinated manner, thereby significantly improving the speed and accuracy of athletes in judging the green terrain, grass texture and hole position in complex lighting environments. By simplifying the complex multi-layer coating process into an efficient raw material mixing and one-time molding process, not only are the high investment and complex operation of high vacuum coating equipment avoided, significantly reducing production costs, but also the product's consistency and durability are far superior to surface treatment technologies that rely on physical adsorption, as the functional molecules and matrix resin form a stable integrated structure through chemical bonding. This makes high-performance, customized golf lenses possible for large-scale industrial application, combining excellent optical performance with economic benefits. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the method flow structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the multi-band transmittance of the lens of the present invention. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1 (I) Preparation of core functional agents Preparation of 1.490nm-570nm green light enhancer In this embodiment, the green light enhancer is a benzoxazole derivative, specifically a 2-phenylbenzoxazole and a naphthylimide fluorescent molecule, specifically a complex of N-butyl-1,8-naphthylimide. The specific steps are as follows: Preparation of 2-phenylbenzoxazole: 10 parts by mass of o-aminophenol, 8 parts by mass of benzoic acid, and 30 parts by mass of polyphosphoric acid catalyst were added to a three-necked flask and stirred until homogeneous. The mixture was heated to 160°C and reacted at a constant temperature for 4 hours. After cooling, 5 times the volume of deionized water was poured in to precipitate the solid. The solid was filtered and washed with 10% sodium carbonate solution until neutral. The solid was recrystallized twice with ethanol and dried under vacuum at 80°C for 2 hours to obtain white needle-like crystals.

[0020] Preparation of N-butyl-1,8-naphthalimide: 10 parts by mass of 1,8-naphthalenedicarboxylic anhydride, 6 parts by mass of n-butylamine, and 50 parts by mass of xylene solvent; n-butylamine was added dropwise at 140℃ and kept under reflux for 6 hours; the mixture was cooled and filtered, and the filter residue was washed twice with xylene and recrystallized with acetone. The residue was then dried under vacuum at 70℃ for 3 hours to obtain yellow powdery crystals.

[0021] Compound reinforcing agent: Weigh 7.5 parts of the above-mentioned 2-phenylbenzoxazole and 2.5 parts of N-butyl-1,8-naphthalimide at a mass ratio of 3:1, mix at 1500 rpm for 15 minutes, and set aside.

[0022] Preparation of 2.570nm-590nm yellow light filter Raw material ratio, parts by weight: 10 parts sodium p-aminobenzenesulfonate, 3 parts sodium nitrite, 8 parts 37% hydrochloric acid, 5 parts N,N-dimethylaniline, 100 parts deionized water; Diazotization reaction: Sodium p-aminobenzenesulfonate was dissolved in 50 parts of water, cooled to 0-5℃ in an ice bath, sodium nitrite aqueous solution was added, and hydrochloric acid was added dropwise after stirring for 10 minutes. The temperature was maintained for 30 minutes to obtain a diazonium salt solution. Coupling reaction: N,N-dimethylaniline was dissolved in 10 parts of ethanol, a diazonium salt solution was added, the pH was adjusted to 6-7 with sodium carbonate solution, and the reaction was stirred at room temperature for 2 hours; the mixture was filtered and washed 3 times, and dried under vacuum at 60°C for 4 hours to obtain an orange-yellow powder.

[0023] Preparation of copper phthalocyanine, a red light filter in the 3.620nm-780nm range Raw material ratio, parts by weight: 10 parts phthalonitrile, 2 parts copper chloride, 40 parts quinoline solvent, 0.5 parts ammonium molybdate catalyst; Reaction process: The mixture was dissolved and sealed in a high-pressure reactor, heated to 200℃ and reacted at a constant temperature for 8 hours; after cooling and filtration, the filter residue was washed with ethanol, 5% hydrochloric acid and deionized water in sequence until neutral, and then dried under vacuum at 100℃ for 3 hours to obtain a blue-green powder.

[0024] (ii) Raw material pretreatment and mixing 1. Raw material selection and proportioning, by mass parts High-strength resin matrix: epoxy resin E-51, refractive index 1.60, 100 parts; UV absorber: 2-(2'-hydroxy-5'-methylphenyl)benzotriazole (UV-P), 6 parts; Blue light blocking agent: 2,4-dihydroxybenzophenone (BP-1), 12 parts; Green light enhancer, 10 parts; Yellow light filter, 8 parts; Red light filter, 9 parts.

[0025] 2. Raw material pretreatment The epoxy resin was dried at 80℃ for 2 hours, and the moisture content was ≤0.1%. All functional agents were screened through a 100-mesh standard sieve; An electronic balance with an accuracy of 0.001g was used for weighing, with an error of ≤±0.1%.

[0026] 3. Vacuum mixing process Equipment: High-speed shear vacuum mixer; Operation: Maintain vacuum at -0.095 MPa, stir at 1000 rpm, and stir continuously for 45 minutes; Verification: Laser particle size analyzer detected a molecular dispersion non-uniformity of 3.2%, and gas chromatograph detected a bubble content of <0.05%.

[0027] (III) Casting Mold pretreatment: Polish the inner wall Ra≤0.005μm, wipe with anhydrous ethanol, and preheat to 30℃ for 30 minutes.

[0028] Casting process: The mixture is injected into the mold at a rate of 5 mL / min and vented through a 0.1 mm micro-venting groove; after sealing, it is placed in a constant temperature chamber at 30°C for 15 minutes.

[0029] (iv) Curing and finishing 1. Thermosetting Segmented heating: from room temperature to 60℃, 5℃ / h, hold at 60℃ for 1 hour, then to 90℃, 10℃ / h, hold at 90℃ for 3 hours. The Shore hardness after curing is D86.

[0030] 2. Finishing The 45° edge chamfer width is 0.8mm, with an accuracy of ±0.05mm; 1μm cerium oxide polishing, surface roughness Ra≤0.01μm; Optical center deviation ≤0.1mm.

[0031] (v) Quality Inspection Spectral performance: 490nm-570nm gain 31%, spectral interference 13%, ultraviolet blocking rate 99.3%, blue light absorption rate 91%, yellow-green light absorption rate 87%, red light absorption rate 89%, using a spectrophotometer; Aspherical curvature: error ≤ ±0.01mm, using a laser interferometer; Visual distortion: MTF value decreased by 7.5%; Reliability: After being placed in a 40℃ / 85%RH environment for 1000 hours, there is no fogging or delamination, and the spectral attenuation is ≤2%.

[0032] Layerless structure: No risk of membrane peeling or fogging; Visual distortion-free: clear peripheral vision; like Figure 1 The diagram shows the multi-band transmittance of the multi-band aspherical lens for golf prepared in Embodiment 1 of the present invention.

[0033] Example 2 Differences from Example 1: Raw materials: 100 parts of polycarbonate resin PC-2805 with a refractive index of 1.59; 7 parts of ultraviolet absorber; 14 parts of blue light blocking agent; 11 parts of green light enhancer; 7 parts of yellow light filter; and 10 parts of red light filter. Process: Vacuum mixing - 0.098MPa, 1100rpm, 50 minutes; Thermosetting: 95℃, 3.5 hours; Comparison table of Example 1 and Example 2: Example 3 Differences from Example 1: Raw materials: Lower limit ratio of functional agents, by weight: 5 parts ultraviolet absorber, 10 parts blue light blocking agent, 8 parts green light enhancer, 6 parts yellow light filter, and 7 parts red light filter; Process: Vacuum mixing: -0.09MPa, 800rpm, 30 minutes; pouring temperature: 25℃; thermosetting: 80℃, 2 hours; Comparison table of Example 1 and Example 3: Conclusion: The above embodiments fully demonstrate that the present invention, through the combination of a specific functional molecular system with vacuum mixing and aspherical casting molding process, successfully prepared a multi-band aspherical lens specifically for golf. This lens has achieved good technical results in selectively enhancing green light, effectively filtering interference light, and eliminating visual distortion. Furthermore, the technical solution has good reproducibility and stability, and fully realizes the purpose of the invention.

[0034] Finally, it should be noted that the accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other. In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-band aspherical lens for golf, characterized in that: include: High-strength resin matrix with a refractive index of 1.58 to 1.62; And a variety of functional molecules uniformly dissolved in the high-strength resin matrix, wherein the non-uniformity of the distribution of the functional molecules in the matrix is ​​less than 5%; The functional molecules include: Ultraviolet absorbers are used to block ultraviolet rays in the 380nm to 400nm wavelength range. Blue light blocking agent, used to absorb blue light in the 400nm to 450nm wavelength range; 490nm-570nm green light enhancer, used to selectively enhance green light in the 490nm to 570nm wavelength range; 570nm-590nm filter, used to absorb yellow-green light in the 570nm to 590nm wavelength range; 620nm-780nm filter, used to absorb red to near-infrared light in the 620nm to 780nm wavelength band; The lens is an aspherical structure formed in one step using a mold.

2. The multi-band aspherical lens for golf according to claim 1, characterized in that: The high-strength resin matrix is ​​epoxy resin or polycarbonate resin.

3. The multi-band aspherical lens for golf according to claim 1, characterized in that: The 490nm-570nm green light enhancer comprises a complex of benzoxazole derivatives and naphthimide fluorescent molecules.

4. The multi-band aspherical lens for golf according to claim 1, characterized in that: The 570nm-590nm filter is an azo compound, and the 620nm-780nm filter is a phthalocyanine metal complex.

5. The multi-band aspherical lens for golf according to claim 1, characterized in that: The lens has a transmittance gain of greater than 25% in the 490nm to 570nm wavelength band and spectral interference ≤15%.

6. A method for manufacturing a multi-band aspherical lens for golf as described in any one of claims 1 to 5, characterized in that, Includes the following steps: S1. Raw material pretreatment: Prepare high-strength resin matrix raw materials and the ultraviolet absorber, blue light blocking agent, 490nm-570nm green light enhancer, 570nm-590nm filter, and 620nm-780nm filter in proportion. S2. Vacuum mixing: The pretreated raw materials are subjected to high-speed shearing and stirring under vacuum conditions to completely dissolve the functional molecules in the resin matrix and form a uniform mixed solution. S3. Casting and molding: The mixed solution is injected into an aspherical mold for casting and molding to obtain a lens preform; S4. Curing and finishing: The lens preform is subjected to thermosetting treatment, followed by edge chamfering and polishing to obtain the multi-band aspherical lens.

7. The method for manufacturing multi-band aspherical lenses for golf according to claim 6, characterized in that: In the vacuum mixing step, the vacuum level is maintained at -0.09MPa to -0.1MPa, the stirring speed is 800 to 1200 rpm, and the mixing time is 30 to 60 minutes.

8. The method for manufacturing multi-band aspherical lenses for golf according to claim 6, characterized in that: In the casting process, the mold temperature is 25°C to 35°C; the temperature of the thermosetting treatment is 80°C to 100°C, and the curing time is 2 to 4 hours.

9. The method for manufacturing multi-band aspherical lenses for golf according to claim 6, characterized in that: In the raw material pretreatment step, the components are as follows by mass: 100 parts of high-strength resin matrix, 5-8 parts of ultraviolet absorber, 10-15 parts of blue light blocking agent, 8-12 parts of 490nm-570nm green light enhancer, 6-9 parts of 570nm-590nm filter, and 7-11 parts of 620nm-780nm filter.

10. The method for manufacturing multi-band aspherical lenses for golf according to claim 6, characterized in that: Following the curing and finishing steps, a quality inspection step is also included to test the aspherical curvature and spectral transmission performance of the formed lens.

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