CN118068464B - Self-correcting high-order aberration lens and preparation process thereof - Google Patents
Self-correcting high-order aberration lens and preparation process thereof Download PDFInfo
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Abstract
The invention relates to the technical field of optics, in particular to a self-correcting high-order aberration lens and a preparation process thereof. The technical key points are as follows: the lens is sequentially provided with a coated antireflection layer, a protective layer I, a base lens, a high-order aberration self-correcting layer, a protective layer II and a coated antireflection layer; the high-order aberration self-correcting layer comprises a plurality of concentric ring lenses with different radiuses, the concentric ring lenses and the base lens are coaxially arranged, each concentric ring lens can generate relatively stable refractive power and high-order aberration, and local regular astigmatism and irregular astigmatism can be provided in the effective working area range defined by the pupil size; the concentric ring lens surfaces are provided with visible light photo-deformable membranes. The invention improves the high-order aberration through the arrangement of the plurality of concentric ring lenses, and simultaneously endows the concentric ring lenses with the photo-induced deformation through the visible light photo-induced deformation material, so as to avoid the visual quality reduction caused by the increase of light scattering.
Description
Technical Field
The invention relates to the technical field of optics, in particular to a self-correcting high-order aberration lens and a preparation process thereof.
Background
A higher order aberration (higher-order aberrations) lens is a type of glasses specifically designed to correct higher order aberrations in the optical system of the eyeball. The refractive system of the eye is usually referred to, and the basic spherical aberration and astigmatism are considered. Higher order aberrations, however, are more complex and subtle optical distortions, including higher order wavefront distortions. Higher order aberrations may cause visual problems such as halo, starburst or image distortion. To correct these problems, ophthalmic professionals often utilize higher order aberration glasses. The design of these glasses allows for more complexity of the ocular optical system to provide more accurate vision correction.
In the prior art, the design scheme for the higher-order aberration lens is mostly focused on the design of a higher-order aberration independent lens or the function of adding pure higher-order aberration. However, the perception of the visual system of human eyes to light is a dynamic process, and can be greatly influenced along with the change of illumination intensity and illumination incidence angle, especially when the light is in stronger light, the light scattering directions in the left eye and the right eye are different, and some scattering is reduced, so that the visual quality is reduced, the change of the illumination direction and intensity can also cause the increase of higher-order aberration, and further the definition and detail perception of vision are influenced, and the visual quality is particularly expressed as image distortion, image deformation or visual discomfort.
Disclosure of Invention
The invention aims to develop a self-correcting higher-order aberration lens and a preparation process thereof, wherein the higher-order aberration is improved through the arrangement of a plurality of concentric ring lenses, simultaneously, the photo-induced deformation of the concentric ring lenses is endowed by a visible light photo-induced deformation material, the curvature and the luminosity of the concentric ring lenses are adjusted through changing the shape of the concentric ring lenses, the diopter is changed, the propagation direction of light is adapted to the lens of a human eye, and the visual quality reduction caused by different light scattering of left eyes and right eyes under different light irradiation is avoided.
The technical aim of the invention is realized by the following technical scheme:
the invention provides a self-correcting high-order aberration lens, which is sequentially provided with a coated antireflection layer, a protective layer I, a base lens, a high-order aberration self-correcting layer, a protective layer II and a coated antireflection layer;
The high-order aberration self-correcting layer comprises a plurality of concentric ring lenses with different radiuses, the concentric ring lenses and the base lens are coaxially arranged, each concentric ring lens can generate relatively stable diopter and high-order aberration, and local regular astigmatism and irregular astigmatism can be provided simultaneously in an effective working area range defined by the pupil size; the concentric ring lens surfaces are provided with visible light photo-deformable membranes.
In the invention, the design of the concentric ring lens not only solves the higher-order aberration, but also provides the services of local regular astigmatism and irregular astigmatism in the effective working area. The comprehensive astigmatism correction enables the human eye to enjoy clear and comfortable vision under different illumination conditions.
Meanwhile, the visible light photoinduced deformation film is arranged on the surface of the concentric ring lens, intelligent adaptability is provided for the lens, the concentric ring lens can be adjusted in shape in real time due to the existence of the film, and the change of luminosity and the change of surface type of different areas complement aberration so as to adapt to the change of different illumination intensities and incidence angles, so that the visual effect is optimized.
Further, the concentric ring lens is arranged outside the diameter of 8-10 mm of the central area of the base lens.
Further, the higher order aberration self-correcting layer comprises at least 4 or more concentric ring lenses with different radii.
Further, the optical power of the concentric ring lens tends to increase or decrease from the central region to the peripheral region, so that the optical power of the self-correcting higher order aberration lens exhibits a linear optical power gradient.
In the invention, the self-correction of higher order aberration can be realized by setting the luminosity gradient, namely the trend of gradually increasing from the central area to the peripheral area. This design can provide relatively stable optical power and higher order aberration performance in the effective working area of the eye.
Further, determining the luminosity of the concentric ring lens according to the linear luminosity gradient and the radius of the concentric ring lens; the calculation formula is as follows:
Nr=N0+G·r；
wherein Nr is the luminosity of the concentric ring lens, and the unit is cd.mm -1;
N 0 is the initial power of the base lens, cd.mm -1;
G is a linear photometric gradient in cd.mm -2;
r is the radial radius of the concentric ring lens in mm;
Wherein G is more than 0.1 and less than or equal to 5.
In the present invention, the above formula defines the luminosity of the concentric ring lens, helping to reduce some distortion in the optical system, thereby improving visual quality. By setting different luminosity in different areas, the propagation path of light can be better adjusted, and the vision problem caused by high-order aberration is reduced.
Further, the linear photometric gradient G is determined by higher-order aberrations Z 0 of the third order or more expressed in terms of zernike polynomial standard term coefficients.
The specific calculation mode is as follows:
calculating lateral and longitudinal partial derivatives of the wavefront distortion function: the wave front distortion function is calculated by the lateral and longitudinal partial derivatives to obtain And。
The derivative of the wavefront distortion function is related to the luminosity by a luminosity formula, where luminosity n can be written as:
；
where n 0 is the initial luminosity, G and H are the gradient of luminosity as a function of x and y, and n (x, y) is the local luminosity; And Is the partial derivative of the wavefront distortion function W with respect to x and y.
Since concentric ring lenses are used in the present invention, the longitudinal partial derivative H is negligible, then by calculationObtaining a linear photometric gradient G value, the calculation formula is:。
Further, the linear photometric gradient G is corrected by the visible light photoinduced deformation characteristics of the concentric ring lenses; the correction formula is: g 1 =g·f (I) ·f (II);
Wherein G 1 is the linear photometric gradient after correction, and the unit is cd.mm -2.
G linear photometric gradient, unit is cd.mm -2;
f (I) is a linear function of the illumination intensity fitted to the rate of photodeformation of the concentric ring lens; f (II) is a linear function of the photo-induced deformation ratio of the concentric ring lens and the photometric fit of the concentric ring lens.
Specifically, in the present invention, f (I) is selected as a fitting model, expressed as f (I) =ak 1 +b, where f (I) is the photo-deformation rate of the concentric ring lens, K 1 is the illumination intensity, a and b are parameters fitted according to experimental data, and the unit is 1.
F (II) a linear function was chosen as the fitting model, the linear function being f (II) =ck 2 +d, where f (II) is the rate of photodeformation of the concentric ring lens, K 2 is the luminosity of the concentric ring lens, c and d are parameters fitted according to experimental data, in 1.
Further, determining the refractive index of the concentric ring lens according to the corrected linear luminosity gradient and the radius of the concentric ring lens; the calculation formula is as follows:
Nr=N0+G1•r；
Wherein N r is the luminosity of a concentric ring lens, and the unit is cd.mm -1;
N 0 is the initial power of the base lens in cd mm -1;
G 1 is the linear photometric gradient after correction, the unit is cd.mm -2;
r is the radius of the concentric ring lens in mm.
In the invention, the linear luminosity gradient can be systematically adjusted by adopting the formula, the gradual change of the luminosity of the concentric ring lens can be realized, so that the higher-order aberration can be effectively self-corrected, the higher-order aberration can be more accurately controlled and improved, the performance of an optical system can be improved to the greatest extent, meanwhile, the image distortion and other optical problems caused by the higher-order aberration can be reduced or eliminated by accurately controlling the luminosity gradient, and the system can be better suitable for the biological optical characteristics of human eyes.
The correction principle of the invention is that the lenses of the left eye and the right eye are in the same illumination condition, the illumination angles of the light rays are different, so that the adjustment of the higher-order aberration of the left eye and the right eye is inaccurate.
Further, the radius difference of two adjacent concentric ring lenses is 4-6 mm.
In the present invention, a moderate radius difference enables the refractive power of the concentric ring lens to be gradually changed, achieving a smoother and natural optical effect. The gradual change of refractive power helps to provide a comfortable visual experience, and the selection of the radius difference helps to achieve uniform distribution of higher order aberrations in the range of 4-6 mm.
The design considers the distribution of high-order aberration in the effective working area, reduces the possibility of local vision discomfort and improves the overall vision quality; in addition, the difference of the radius provided by the invention considers the biological optical difference of human eyes, ensures that the concentric ring lens is better suitable for the biological optical characteristics of the central area and the peripheral area, and ensures that the visual effect is more in line with the physiological structure of human eyes; meanwhile, the moderate range of the radius difference is favorable for maintaining the stability of photoinduced deformation, so that the deformation can be effectively generated under different illumination conditions, and the applicability and the performance stability of the lens are enhanced.
The second objective of the present invention is to provide a process for preparing a lens capable of self-correcting higher order aberration, which has the same technical effects.
The technical aim of the invention is realized by the following technical scheme:
A preparation process of a self-correcting higher-order aberration lens comprises the following steps:
S1, injecting polyurethane resin into a mold, and curing to obtain a base lens;
S2, forming a plurality of concentric ring lenses on the convex surface of the base lens according to the luminosity obtained by the calculation result;
S3, forming a visible light photoinduced deformation film on the surface of the concentric ring lens to obtain a high-order aberration self-correcting layer;
s4, immersing the lens into an organic silicon resin solution, curing, and forming a protective layer I and a protective layer II on the concave surface and the convex surface of the lens respectively;
S5, forming a coating anti-reflection layer on the convex surface of the lens obtained in the step S4;
S6, forming a coating antireflection layer on the concave surface of the lens obtained in the step S5.
In step S2, a plurality of concentric ring lenses are formed on the convex surface of the base lens by laser etching.
In step S3, a visible light photo-deformable film is formed on the surface of the concentric ring lens by vapor deposition.
In summary, the invention has the following beneficial effects:
1. the invention adds a plurality of concentric ring lenses with different radiuses into the lens, and the scheme effectively self-corrects higher-order aberration, so that the lens can generate relatively stable refractive power in an effective working area, thereby improving visual quality.
2. The concentric ring lens design provided by the invention not only solves the problem of higher-order aberration, but also simultaneously provides the service of local regular astigmatism and irregular astigmatism in an effective working area, and the comprehensive astigmatism correction ensures that a user can enjoy clear and comfortable vision under different illumination conditions.
3. The visible light photoinduced deformation film is arranged on the surface of the concentric ring lens, intelligent adaptability is provided for the lens, and the concentric ring lens can be adjusted in shape in real time by the film, so that the visible light photoinduced deformation film is suitable for changes of different illumination intensities and incidence angles, and the visual effect is optimized.
4. The application of the coated antireflection layer and the arrangement of the two protective layers not only improve the optical performance of the lens, but also effectively protect the surface of the lens and prolong the service life.
Drawings
FIG. 1 is a schematic diagram of a self-correcting higher order aberration-correcting lens according to the present invention;
FIG. 2 is a schematic diagram of a concentric ring lens of the present invention;
Fig. 3 is a schematic cross-sectional view of the lens of the present invention.
Reference numerals
1. A film-coated antireflection layer; 2. a protective layer I;3. a base lens; 4. a higher order aberration self-correcting layer; 5. a protective layer II;6. a film coating anti-reflection layer; 7. a self-correcting higher order aberration lens; 41. visible light optically deformable films.
Detailed Description
In order to further describe the technical means and effects adopted by the invention to achieve the preset aim, the invention provides a self-correcting higher-order aberration lens and a preparation process thereof, and specific embodiments, characteristics and effects thereof are described in detail below.
The lens is sequentially provided with a coated antireflection layer, a protective layer I, a base lens, a high-order aberration self-correcting layer, a protective layer II and a coated antireflection layer;
the high-order aberration self-correcting layer comprises at least 4 concentric ring lenses with different radiuses, the concentric ring lenses and the base lens are coaxially arranged, each concentric ring lens can generate relatively stable refractive power and high-order aberration, and local regular astigmatism and irregular astigmatism can be provided in the effective working area range defined by the pupil size; the surface of the concentric ring lens is provided with a visible light photoinduced deformation film, the concentric ring lens is arranged outside the diameter of 8-10 mm of the central area of the base lens, and the luminosity of the concentric ring lens is gradually increased or decreased from the central area to the peripheral area, so that the luminosity of the lens with the self-correcting higher-order aberration shows a linear luminosity gradient.
Wherein, the linear luminosity gradient G is determined by higher-order aberration Z 0 with the Zernike polynomial standard term coefficient as expression form.
The specific calculation mode is as follows:
calculating lateral and longitudinal partial derivatives of the wavefront distortion function: the wave front distortion function is calculated by the lateral and longitudinal partial derivatives to obtain And。
The derivative of the wavefront distortion function is related to the luminosity by a luminosity formula, where luminosity n can be written as:
；
Where n 0 is the initial luminosity of the center point, G and H are gradients of refractive index as a function of x and y, and n (x, y) is the local luminosity; And Is the partial derivative of the wavefront distortion function W with respect to x and y.
Since concentric ring lenses are used in this embodiment, the longitudinal partial derivative H is negligible, then by calculationObtaining a linear photometric gradient G value, the calculation formula is: In this embodiment, the G value is calculated as 0.086mm -1, and the radius difference between two adjacent concentric ring lenses is 4-6 mm.
Further determining the luminosity of each concentric ring lens according to the linear luminosity gradient and the radius of the concentric ring lens; the calculation formula is as follows:
Nr=N0+G·r；
wherein Nr is the luminosity of the concentric ring lens, and the unit is cd.mm -1;
N 0 is the initial power of the base lens in cd mm -1;
G is a linear photometric gradient in cd.mm -2;
r is the radial radius of the concentric ring lens in mm;
Wherein G is more than 0.1 and less than or equal to 5.
In this specific embodiment, another preferred scheme is also proposed: the linear luminosity gradient G is corrected by the visible light photoinduced deformation characteristic of the concentric ring lens; the correction formula is: g 1 =g·f (I) ·f (II);
Wherein G 1 is the linear photometric gradient after correction, and the unit is cd.mm -2.
G linear photometric gradient, unit is cd.mm -2;
f (I) is a linear function of the illumination intensity fitted to the rate of photodeformation of the concentric ring lens; f (II) is a linear function of the photo-induced deformation ratio of the concentric ring lens and the photometric fit of the concentric ring lens.
Specifically, in the present invention, f (I) is selected as a fitting model, and is expressed as f (I) =ak 1 +b, where f (I) is the photo-deformation rate of the concentric ring lens, K 1 is the illumination intensity, a and b are parameters fitted according to experimental data, and f (I) = 271.75 is obtained according to the fitting result.
F (II) a linear function was chosen as the fitting model, the linear function being f (II) =ck 2 +d, where f (II) is the rate of photodeformation of the concentric ring lens, K 2 is the luminosity of the concentric ring lens, c and d are parameters fitted from experimental data, and f (II) =0.02 was obtained from the fitting result.
G 1=0.093mm-1.
Further, determining the luminosity of the concentric ring lens according to the corrected linear luminosity gradient and the radius of the concentric ring lens; the calculation formula is as follows:
Nr=N0+G1•r；
Wherein N r is the luminosity of a concentric ring lens, and the unit is cd.mm -1;
N 0 is the initial power of the base lens in cd mm -1;
G 1 is the linear photometric gradient after correction, the unit is cd.mm -2;
r is the radius of the concentric ring lens in mm.
Further, the luminosity of the corrected concentric ring lens was calculated by G 1.
The photo-deformable film used in the embodiment is made of photo-deformable material, and when light with specific wavelength or certain intensity is irradiated, photo-physical or photochemical effect is generated in the photo-deformable material, so that the photo-energy is converted into mechanical energy, and the material is deformed in an extending way; when light with specific wavelength or certain intensity disappears, for example, under the environment of light intensity weakening, the photoinduced deformation material is restored to the original state, so that the accurate and rapid light driving of the photoinduced deformation film is realized, and the characteristics of restorability and repeatable driving are realized.
In some preferred embodiments provided herein, the photo-deformable material may be one of a photo-sensitive liquid crystal elastomer, a photo-sensitive material with photo-induced stress relief, and a PLZT ceramic material, or a combination thereof.
In some preferred embodiments provided herein, the photo-deformable material is an azobenzene liquid crystal elastomer with an ethoxy backbone synthesized by a cationic photopolymerization method, which is capable of bending under high intensity light irradiation and recovering under weak intensity visible light irradiation. Specifically, the deformation principle adopted in the specific embodiment is that the azobenzene unit changes the alignment degree of liquid crystal molecules under strong light irradiation, so that macroscopic shrinkage occurs.
The specific embodiment also provides a preparation process of the self-correcting higher-order aberration lens, which comprises the following steps:
S1, injecting polyurethane resin into a mold, and curing to obtain a base lens;
S2, forming a plurality of concentric ring lenses on the convex surface of the base lens according to the luminosity obtained by the calculation result, wherein in some preferred cases of the specific embodiment, the plurality of concentric ring lenses are formed on the convex surface of the base lens in a laser etching mode;
s3, forming a visible light photo-induced deformation film on the surface of the concentric ring lens to obtain a high-order aberration self-correcting layer, wherein in some preferred cases of the specific embodiment, the visible light photo-induced deformation film is formed on the surface of the concentric ring lens through an evaporation technology;
s4, immersing the lens into an organic silicon resin solution, curing, and forming a protective layer I and a protective layer II on the concave surface and the convex surface of the lens respectively;
S5, forming a coating anti-reflection layer on the convex surface of the lens obtained in the step S4;
S6, forming a coating antireflection layer on the concave surface of the lens obtained in the step S5.
Example 1: self-correcting high-order aberration lens and preparation process thereof
In this embodiment, the self-correcting higher-order aberration lens provided in this embodiment is provided with a coating antireflection layer with a thickness of 360nm in sequence; the thickness of the protective layer I is 2.5 mu m, and the thickness of the base lens is 1.5mm; the high-order aberration self-correcting layer has a thickness of 500nm, a protective layer II, a thickness of 2.5 mu m and a coated anti-reflection layer, and the thickness is 250nm; the high-order aberration self-correcting layer comprises a plurality of concentric ring lenses with different radiuses, the concentric ring lenses and the base lens are coaxially arranged, each concentric ring lens can generate relatively stable refractive power and high-order aberration, and local regular astigmatism and irregular astigmatism can be provided simultaneously in an effective working area range defined by the pupil size; the surface of the concentric ring lens is provided with a visible light photoinduced deformation film, the concentric ring lens is arranged outside the diameter of 8mm of the central area of the base lens, the radius difference of two adjacent concentric ring lenses is 6mm, the luminosity of the concentric ring lenses gradually increases from the central area to the peripheral area, and the luminosity of the lens with the self-correcting higher-order aberration shows a linear luminosity gradient.
In this example, the lens diameter was 70mm, the refractive index of the base lens was 1.56, and the initial luminosity of the base lens was 300, and the number of concentric ring lenses and the radius were as follows:
TABLE 1 arrangement and radius of each concentric ring lens of EXAMPLE 1
According to the calculation result of the G value obtained by the calculation, which is 0.20 cd mm -2, the corrected G 1=0.22 cd·mm-2 is obtained by using the formula:
n r=N0+G1. R calculate the luminosity of concentric ring lenses;
Wherein N r is the luminosity of the concentric ring lens, cd.mm -1;
N 0 is the initial power of the base lens, cd.mm -1;
G 1 is the linear photometric gradient after correction, the unit is cd.mm -2;
r is the radius of the concentric ring lens in mm.
Further, the luminosity of the corrected concentric ring lens was calculated by G 1.
The specific table is as follows:
TABLE 2 luminosity corresponding to concentric ring lenses of different radii
The embodiment also provides a preparation process of the self-correcting higher-order aberration lens, which comprises the following steps:
S1, injecting polyurethane resin into a mold, and curing to obtain a base lens;
S2, forming a plurality of concentric ring lenses on the convex surface of the base lens in a laser etching mode according to the calculated luminosity on the convex surface of the base lens;
s3, forming a visible light photoinduced deformation film on the surface of the concentric ring lens through an evaporation technology to obtain a high-order aberration self-correcting layer;
s4, immersing the lens into an organic silicon resin solution, curing, and forming a protective layer I and a protective layer II on the concave surface and the convex surface of the lens respectively;
S5, forming a coating anti-reflection layer on the convex surface of the lens obtained in the step S4;
S6, forming a coating antireflection layer on the concave surface of the lens obtained in the step S5.
Example 2: self-correcting high-order aberration lens and preparation process thereof
In this embodiment, the self-correcting higher-order aberration lens provided in this embodiment is provided with a film-coated antireflection layer having a thickness of 350nm in order; the thickness of the protective layer I is 2.5 mu m, and the thickness of the base lens is 1.2mm; a high-order aberration self-correcting layer with the thickness of 500nm, a protective layer II with the thickness of 2.3 mu m and a coating anti-reflection layer with the thickness of 200nm; the high-order aberration self-correcting layer comprises a plurality of concentric ring lenses with different radiuses, the concentric ring lenses and the base lens are coaxially arranged, each concentric ring lens can generate relatively stable refractive power and high-order aberration, and local regular astigmatism and irregular astigmatism can be provided simultaneously in an effective working area range defined by the pupil size; the surface of the concentric ring lens is provided with a visible light photoinduced deformation film, the concentric ring lens is arranged outside the diameter of 8mm of the central area of the base lens, the radius difference of two adjacent concentric ring lenses is 5mm, the luminosity of the concentric ring lenses gradually increases from the central area to the peripheral area, and the luminosity of the lens with the self-correcting higher-order aberration shows a linear luminosity gradient.
In this example, the lens diameter is 60mm, the refractive index of the base lens is 1.50, and the initial luminosity of the base lens is 350, and then the number of concentric ring lenses and the radius are as follows:
TABLE 3 arrangement of concentric Ring lenses and radius
And according to the calculated G value of 0.2mm -1, correcting G 1=0.22mm-1 according to the formula: n r=N0+G1. R calculate the luminosity of concentric ring lenses;
Wherein N r is the luminosity of a concentric ring lens, and the unit is cd.mm -1;
N 0 is the initial power of the base lens in cd mm -1;
G 1 is the linear photometric gradient after correction, the unit is cd.mm -2;
r is the radius of the concentric ring lens in mm.
Further, the corrected concentric ring lens luminosity was calculated by G 1, see table below:
TABLE 4 radii of different concentric ring lenses and their corresponding luminosity
The embodiment also provides a preparation process of the self-correcting higher-order aberration lens, which comprises the following steps:
S1, injecting polyurethane resin into a mold, and curing to obtain a base lens;
S2, forming a plurality of concentric ring lenses on the convex surface of the base lens in a laser etching mode according to the luminosity obtained by the calculation result;
s3, forming a visible light photoinduced deformation film on the surface of the concentric ring lens through an evaporation technology to obtain a high-order aberration self-correcting layer;
s4, immersing the lens into an organic silicon resin solution, curing, and forming a protective layer I and a protective layer II on the concave surface and the convex surface of the lens respectively;
S5, forming a coating anti-reflection layer on the convex surface of the lens obtained in the step S4;
S6, forming a coating antireflection layer on the concave surface of the lens obtained in the step S5.
Example 3: self-correcting high-order aberration lens and preparation process thereof
In this embodiment, the self-correcting higher-order aberration lens provided in this embodiment is provided with a film-coated antireflection layer having a thickness of 350nm in order; the thickness of the protective layer I is 2.5 mu m, and the thickness of the base lens is 1.2mm; a high-order aberration self-correcting layer with the thickness of 500nm, a protective layer II with the thickness of 2.3 mu m and a coating anti-reflection layer with the thickness of 200nm; the high-order aberration self-correcting layer comprises a plurality of concentric ring lenses with different radiuses, the concentric ring lenses and the base lens are coaxially arranged, each concentric ring lens can generate relatively stable refractive power and high-order aberration, and local regular astigmatism and irregular astigmatism can be provided simultaneously in an effective working area range defined by the pupil size; the concentric ring lenses are arranged outside the diameter of 8mm of the central area of the base lens, the radius difference of two adjacent concentric ring lenses is 5mm, and the luminosity of the concentric ring lenses gradually increases from the central area to the peripheral area, so that the luminosity of the self-correcting higher-order aberration lens shows a linear luminosity gradient.
In this example, the lens diameter is 60mm, the refractive index of the base lens is 1.50, and the initial luminosity of the base lens is 350, and then the number of concentric ring lenses and the radius are as follows:
The calculated G value according to the calculation is 0.2 cd.mm -1 according to the formula: n r=N0 + G.r calculate the luminosity of concentric ring lenses;
Wherein N r is the luminosity of a concentric ring lens, and the unit is cd.mm -1;
N 0 is the initial power of the base lens in cd mm -1;
g is a linear photometric gradient in mm -1;
r is the radius of the concentric ring lens in mm.
Further, the corrected concentric ring lens luminosity was calculated by G 1, see table below:
The embodiment also provides a preparation process of the self-correcting higher-order aberration lens, which comprises the following steps:
S1, injecting polyurethane resin into a mold, and curing to obtain a base lens;
S2, forming a plurality of concentric ring lenses on the convex surface of the base lens in a laser etching mode according to the calculated luminosity;
s3, forming a visible light photoinduced deformation film on the surface of the concentric ring lens through an evaporation technology to obtain a high-order aberration self-correcting layer;
s4, immersing the lens into an organic silicon resin solution, curing, and forming a protective layer I and a protective layer II on the concave surface and the convex surface of the lens respectively;
S5, forming a coating anti-reflection layer on the convex surface of the lens obtained in the step S4;
S6, forming a coating antireflection layer on the concave surface of the lens obtained in the step S5.
Comparative example 1: self-correcting high-order aberration lens and preparation process thereof
In this embodiment, the self-correcting higher-order aberration lens provided in this embodiment is provided with a coating antireflection layer with a thickness of 360nm in sequence; the thickness of the protective layer I is 2.5 mu m, and the thickness of the base lens is 1.5mm; the high-order aberration self-correcting layer has a thickness of 500nm, a protective layer II, a thickness of 2.5 mu m and a coated anti-reflection layer, and the thickness is 250nm; the high-order aberration self-correcting layer comprises a plurality of concentric ring lenses with different radiuses, the concentric ring lenses and the base lens are coaxially arranged, each concentric ring lens can generate relatively stable refractive power and high-order aberration, and local regular astigmatism and irregular astigmatism can be provided simultaneously in an effective working area range defined by the pupil size; the concentric ring lenses are arranged outside the diameter of 8mm of the central area of the base lens, the radius difference of two adjacent concentric ring lenses is 6mm, and the luminosity of the concentric ring lenses gradually increases from the central area to the peripheral area, so that the luminosity of the self-correcting higher-order aberration lens shows a linear luminosity gradient.
In this example, the lens diameter was 70mm, the refractive index of the base lens was 1.56, and the initial luminosity of the base lens was 300, and the number of concentric ring lenses and the radius were as follows:
TABLE 5 arrangement and radius of concentric ring lenses
The same photometric distribution as in example 1 was used, in particular as follows:
TABLE 6 radii of different concentric ring lenses and their corresponding luminosity
The embodiment also provides a preparation process of the self-correcting higher-order aberration lens, which comprises the following steps:
S1, injecting polyurethane resin into a mold, and curing to obtain a base lens;
S2, forming a plurality of concentric ring lenses on the convex surface of the base lens in a laser etching mode according to the calculated refractive index to obtain a high-order aberration self-correcting layer;
S3, immersing the lens into an organic silicon resin solution, curing, and forming a protective layer I and a protective layer II on the concave surface and the convex surface of the lens respectively;
S4, forming a coating anti-reflection layer on the convex surface of the lens obtained in the step S3;
s5, forming a coating antireflection layer on the concave surface of the lens obtained in the step S4.
Comparative example 2: self-correcting high-order aberration lens and preparation process thereof
In this embodiment, the self-correcting higher-order aberration lens provided in this embodiment is provided with a film-coated antireflection layer having a thickness of 350nm in order; the thickness of the protective layer I is 2.5 mu m, and the thickness of the base lens is 1.2mm; a high-order aberration self-correcting layer with the thickness of 500nm, a protective layer II with the thickness of 2.3 mu m and a coating anti-reflection layer with the thickness of 200nm; the high-order aberration self-correcting layer comprises a plurality of concentric ring lenses with different radiuses, the concentric ring lenses and the base lens are coaxially arranged, each concentric ring lens can generate relatively stable refractive power and high-order aberration, and local regular astigmatism and irregular astigmatism can be provided simultaneously in an effective working area range defined by the pupil size; the surface of the concentric ring lens is provided with a visible light photoinduced deformation film, the concentric ring lens is arranged outside the diameter of the central area of the base lens by 8mm, the radius difference of two adjacent concentric ring lenses is 5mm, and the luminosity of the concentric ring lenses is constant.
In this example, the lens diameter was 60mm, the refractive index of the base lens was 1.50, and the initial luminosity of the base lens was 300, and the number of concentric ring lenses and the radius were as follows:
TABLE 7 arrangement and radius of concentric ring lenses
The luminosity of the concentric ring lens is 305.
The embodiment also provides a preparation process of the self-correcting higher-order aberration lens, which comprises the following steps:
S1, injecting polyurethane resin into a mold, and curing to obtain a base lens;
S2, forming a plurality of concentric ring lenses on the convex surface of the base lens in a laser etching mode according to the obtained luminosity;
s3, forming a visible light photoinduced deformation film on the surface of the concentric ring lens through an evaporation technology according to luminosity to obtain a high-order aberration self-correcting layer;
s4, immersing the lens into an organic silicon resin solution, curing, and forming a protective layer I and a protective layer II on the concave surface and the convex surface of the lens respectively;
S5, forming a coating anti-reflection layer on the convex surface of the lens obtained in the step S4;
S6, forming a coating antireflection layer on the concave surface of the lens obtained in the step S5.
Results of Performance test
The lenses provided in examples 1-2 and comparative examples 1-2 were tested for higher order aberration correction, and for higher order aberration correction at different illumination intensities, by the following method: under a specific light source, testing is carried out through 20 points set on a third concentric ring lens on the lens for detecting the photometric variation of the surface type instrument and the focal power instrument, and whether each point corrects the higher-order aberration is judged.
The test results are shown in the following table.
TABLE 1 Performance test results
In the above embodiment, compared with embodiment 3, in embodiment 2, when the optical gradient is corrected according to the characteristics of the photo-deformable material, the test result shows that the higher-order aberration correction rate of embodiment 2 is higher, which indicates that the optical gradient correction formula provided by the invention has a positive effect on the optical design of the lens.
In example 1, compared with comparative example 1, the concentric ring lens of example 1 uses a photo-deformable material, which can adjust the surface shape according to the light, thereby adjusting the luminosity, so that the higher-order aberration correction rate of example 1 is much higher than that of comparative example 1, which also shows that the concentric ring lens with photo-deformable material provided by the invention can achieve the technical effect of forming higher-order aberration self-correction according to different light.
According to the comparison of comparative example 2 and example 1, although comparative example 2 also uses a photo-deformable material on the concentric ring lens, comparative example 2 does not use a photometric gradient, resulting in a significant decrease in higher order aberration correction rate, which again proves that the photometric gradient provided by the present invention can effectively improve the higher order aberration self-correction rate of the lens.
The present invention is not limited to the above-mentioned embodiments, but is not limited to the above-mentioned embodiments, and any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical matters of the present invention can be made by those skilled in the art without departing from the scope of the present invention.
Claims (6)
1. The self-correcting high-order aberration lens is characterized by being sequentially provided with a coated antireflection layer, a protective layer I, a base lens, a high-order aberration self-correcting layer, a protective layer II and a coated antireflection layer;
the high-order aberration self-correcting layer comprises a plurality of concentric ring lenses with different radiuses, the concentric ring lenses and the base lens are coaxially arranged, each concentric ring lens can generate relatively stable refractive power and high-order aberration, and local regular astigmatism and irregular astigmatism are provided in an effective working area range defined by the pupil size;
the surface of the concentric ring lens is provided with a visible light photoinduced deformation film;
the luminosity of the concentric ring lens is gradually increased or gradually decreased from the central area to the peripheral area, so that the luminosity of the self-correcting higher-order aberration lens presents a linear luminosity gradient;
determining the luminosity of the concentric ring lens according to the linear luminosity gradient and the radius of the concentric ring lens; the calculation formula is as follows:
Nr=N0+G·r；
wherein Nr is the luminosity of the concentric ring lens, and the unit is cd.mm -1;
N 0 is the initial power of the base lens in cd mm -1;
G is a linear photometric gradient in cd.mm -2;
r is the radial radius of the concentric ring lens in mm;
Wherein G is more than 0.1 and less than or equal to 5;
The linear luminosity gradient G is determined by higher-order aberration Z 0 with a Zernike polynomial standard term coefficient as a expression form and more than three orders;
The linear luminosity gradient G is corrected by the visible light photoinduced deformation characteristic of the concentric ring lens; the correction formula is: g 1 =g·f (I) ·f (II);
wherein G 1 is the linear luminosity gradient after correction, and the unit is cd.mm -2;
g linear photometric gradient, unit is cd.mm -2;
f (I) is a linear function of the illumination intensity fitted to the rate of photodeformation of the concentric ring lens; f (II) is a linear function of the photo-induced deformation ratio of the concentric ring lens and the photometric fit of the concentric ring lens;
The f (I) selects a linear function as a fitting model, expressed as f (I) =ak 1 +b, where a and b are parameters fitted according to experimental data, and the unit is 1;
The f (II) selects a linear function as a fitting model, the linear function being f (II) =ck 2 +d, where c and d are parameters fitted according to experimental data, and the unit is 1.
2. The lens of claim 1, wherein the concentric ring lens is disposed outside the central region of the base lens by 8-10 mm in diameter.
3. A self-correcting higher order aberration-correcting lens according to claim 1, wherein the luminosity of the concentric ring lens is determined from the corrected linear luminosity gradient and the radius of the concentric ring lens; the calculation formula is as follows:
Nr=N0+G1•r；
Wherein N r is the luminosity of a concentric ring lens, and the unit is cd.mm -1;
N 0 is the initial power of the base lens in cd mm -1;
g 1 is the linear photometric gradient after correction, cd.mm -2;
r is the radius of the concentric ring lens in mm.
4. The self-correcting higher order aberration-correcting lens of claim 1, wherein the difference in radius between two adjacent concentric ring lenses is 4-6 mm.
5. The process for preparing a lens for self-correcting higher-order aberrations according to any one of claims 1 to 4, comprising the steps of:
S1, injecting polyurethane resin into a mold, and curing to obtain a base lens;
s2, forming a plurality of concentric ring lenses on the convex surface of the base lens according to the luminosity obtained by the calculation result;
S3, forming a visible light photoinduced deformation film on the surface of the concentric ring lens to obtain a high-order aberration self-correcting layer;
s4, immersing the lens into an organic silicon resin solution, curing, and forming a protective layer I and a protective layer II on the concave surface and the convex surface of the lens respectively;
S5, forming a coating anti-reflection layer on the convex surface of the lens obtained in the step S4;
S6, forming a coating antireflection layer on the concave surface of the lens obtained in the step S5.
6. The process for preparing a lens for self-correcting higher-order aberrations according to claim 5, wherein in step S3, a visible light photo-deformable film is formed on the surface of the concentric ring lens by vapor deposition.
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