CN113406737A - Combined Fresnel lens and eyewear - Google Patents
Combined Fresnel lens and eyewear Download PDFInfo
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- CN113406737A CN113406737A CN202110778244.2A CN202110778244A CN113406737A CN 113406737 A CN113406737 A CN 113406737A CN 202110778244 A CN202110778244 A CN 202110778244A CN 113406737 A CN113406737 A CN 113406737A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/02—Simple or compound lenses with non-spherical faces
- G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/02—Simple or compound lenses with non-spherical faces
- G02B3/06—Simple or compound lenses with non-spherical faces with cylindrical or toric faces
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/04—Prisms
- G02B5/045—Prism arrays
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- 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
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/14—Mirrors; Prisms
Abstract
The invention provides a combined Fresnel lens and eyewear, the combined Fresnel lens comprising: the Fresnel lens comprises a lens body and a lens body, wherein the lens body is provided with a Fresnel working surface and a substrate carrying the Fresnel working surface; the lens main body is a spherical lens combined cylindrical lens or a spherical lens combined prism; the Fresnel working surface is provided with a plurality of annular convex ridges, the cross section of each annular convex ridge is approximately in a right triangle shape, the Fresnel working surface is provided with a maximum refractive power direction and a minimum refractive power direction, and the refractive power of the Fresnel working surface is gradually reduced from the maximum refractive power to the minimum refractive power and is in non-rotational symmetry. The combined Fresnel lens provided by the invention solves the problem that the Fresnel lens in the traditional technology cannot combine a spherical lens and a cylindrical lens or a spherical lens and a prism on the same surface.
Description
Technical Field
The invention relates to the technical field of lenses, in particular to a combined Fresnel lens and eyewear.
Background
Good eye use helps people maintain a better vision, however, as people spend more time on electronic screens, more and more people have a reduced vision and have to wear glasses to correct vision. The higher the power of the ophthalmic lens, the thicker the thickness, and the higher the weight. For example, when the power of the negative lens is high, the peripheral area of the lens is very thick, and the visual effect is poor and the range of seeing a normal visual field is small; the heaviness of the thicker lenses when mounted in the frame also causes discomfort and a gradual decrease in the aesthetic appeal. In order to make the lens thinner, manufacturers choose optical materials with high refractive index for making the lens, however, these materials are expensive, which makes the lens price rise, and the lens with higher refractive index can alleviate some of the above problems, but still can not reduce the thickness of the lens to a great extent. There are some fresnel lenses among the prior art, can be under the condition of guaranteeing vision correction effect, and furthest reduces the thickness of lens, and current fresnel lens is mostly the fresnel lens of single form nevertheless, for example single fresnel ball lens, or single fresnel column lens or prism etc. can not satisfy user's vision correction demand.
Disclosure of Invention
The invention provides a combined Fresnel lens and an eyewear, which are used for solving the problems that the Fresnel lens in the prior art can not combine a spherical lens and a cylindrical lens or the spherical lens and a prism and the visual effect of the Fresnel lens is simply superposed is poor, and the weight of the lens of the original lens is reduced through the combination of the lens;
the invention provides a combined Fresnel lens, which is used for combining a spherical lens and a cylindrical lens or combining the spherical lens and a prism, and comprises:
the Fresnel lens comprises a lens body and a lens body, wherein the lens body is provided with a Fresnel working surface and a substrate carrying the Fresnel working surface;
the Fresnel working surface is provided with a plurality of annular convex ridges, the cross section of each annular convex ridge is approximately in a right triangle shape, each annular convex ridge is provided with a first surface inclined to the Fresnel working surface, and the first surface is used for refracting light; the Fresnel working surface is provided with a maximum refractive power direction and a minimum refractive power direction, and the refractive power of the Fresnel working surface is gradually reduced from the maximum directional refractive power to the minimum directional refractive power and is non-rotationally symmetrical.
According to the Fresnel lens provided by the invention, the refractive power of the lens body is formed by superposing the refractive power of the substrate and the refractive power of the Fresnel working surface in the form of a thin lens.
According to the combined Fresnel lens provided by the invention, when the combined Fresnel lens is used for combining a positive spherical lens with a positive cylindrical lens or combining a negative spherical lens with a negative cylindrical lens, and a cylindrical lens axis of the Fresnel working surface extends along a first direction, the direction of the minimum refractive power is the first direction, the direction of the maximum refractive power is a second direction perpendicular to the first direction, and the refractive power of the Fresnel working surface is gradually increased along the first direction to the second direction; and/or the presence of a gas in the gas,
when the Fresnel working surface is used for combining the positive spherical lens with the negative cylindrical lens or combining the negative spherical lens with the positive cylindrical lens, the cylindrical lens shaft of the Fresnel working surface is extended along the first direction, the maximum refractive power direction is the first direction, the minimum refractive power direction is the second direction, and the refractive power of the Fresnel working surface is increased along the second direction to the first direction.
According to the combined Fresnel lens provided by the invention, when the combined Fresnel lens is used for combining a positive spherical lens with a positive cylindrical lens or combining a negative spherical lens with a negative cylindrical lens, a first interval is formed between the annular convex ridges, and under the condition that the first intervals are equal, the heights of the annular convex ridges are gradually increased from the first direction to the second direction; and/or the presence of a gas in the gas,
when the annular convex edge is used for combining the positive spherical lens with the negative cylindrical lens or combining the negative spherical lens with the positive cylindrical lens, the height of each annular convex edge is gradually reduced from the first direction to the second direction under the condition that the first distances are equal.
According to the combined Fresnel lens provided by the invention, under the condition that the combined Fresnel lens is used for combining a positive spherical lens with a positive cylindrical lens or combining a negative spherical lens with a negative cylindrical lens and the heights of the annular convex edges are equal, the first intervals are arranged in a manner of gradually decreasing from the first direction to the second direction, and the annular convex edges are oval in a plan view; and/or the presence of a gas in the gas,
when the annular convex edges are used for combining the positive spherical lens with the negative cylindrical lens or combining the negative spherical lens with the positive cylindrical lens, and the heights of the annular convex edges are equal, the first intervals are gradually increased from the first direction to the second direction, and the annular convex edges are oval when viewed from the top.
According to the combined fresnel lens provided by the invention, when the combined fresnel lens is used for a negative spherical mirror combined prism, the prism base direction of the fresnel working surface extends along a third direction, and the prism vertex angle direction of the fresnel working surface extends along a fourth direction, the third direction is opposite to the fourth direction, the third direction is a maximum refractive power direction, the fourth direction is a minimum refractive power direction, and the refractive power of the fresnel working surface is gradually reduced along the third direction to the fourth direction;
when the prism apex angle direction of the Fresnel working surface is extended along the fourth direction, the third direction is opposite to the fourth direction, the third direction is the minimum refractive power direction, the fourth direction is the maximum refractive power direction, and the refractive power of the Fresnel working surface is increased along the third direction.
According to the combined Fresnel lens provided by the invention, when the combined Fresnel lens is used for a negative spherical mirror combined prism, a second interval is formed in front of each annular convex rib, and under the condition that the second intervals are equal, the height of each annular convex rib is gradually reduced from the third direction to the fourth direction; and/or the presence of a gas in the gas,
under the condition that the second distances are equal and are used for the spherical mirror-integrating prism, the heights of the annular convex ridges are gradually increased from the third direction to the fourth direction.
According to the combined Fresnel lens provided by the invention, under the condition that the combined Fresnel lens is used for a negative spherical mirror combined prism and the heights of the annular convex ridges are equal, the second intervals are gradually increased from the third direction to the fourth direction; and/or the presence of a gas in the gas,
and under the condition that the heights of the annular convex ridges are equal and the heights of the annular convex ridges are used for the spherical mirror combination prism, the second intervals are gradually reduced from the third direction to the fourth direction.
According to the Fresnel lens combination provided by the invention, the substrate comprises any one or more of a pure spherical lens, a pure cylindrical lens, a pure prism and a non-refractive power lens.
On the basis of the above-mentioned combined fresnel lens, the present invention also provides an eyewear comprising:
a combined Fresnel lens, which is a combined Fresnel lens as described above; and the number of the first and second groups,
a carrier for mounting the joint Fresnel lens.
The combined Fresnel lens and the eyewear provided by the invention combine the spherical lens and the cylindrical lens or the spherical lens and the prism through vector synthesis, thereby solving the problem that the Fresnel lens in the traditional technology can not combine the spherical lens and the cylindrical lens or the spherical lens and the prism on the same surface.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of a cross-sectional view of a first embodiment of a combined Fresnel lens provided by the invention (negative spherical lens combined with negative cylindrical lens with cylindrical lens axis along a first direction) along a first direction;
FIG. 2 is a schematic structural view of a cross-sectional view of a first embodiment of a combined Fresnel lens provided by the invention (negative spherical lens combined with negative cylindrical lens with cylindrical lens axis along a first direction) along a second direction;
FIG. 3 is a schematic diagram of a top view structure of a second embodiment of a Fresnel lens combination (negative spherical lens combination with negative cylindrical lens with cylindrical lens axis along a first direction) provided by the present invention;
FIG. 4 is a schematic structural diagram of a cross-sectional view of a third embodiment of a combined Fresnel lens provided by the invention (the vertex angle of a negative spherical mirror combined prism is along a fourth direction) along a third direction and a fourth direction;
FIG. 5 is a schematic cross-sectional structure view along the third and fourth directions of a third embodiment of the Fresnel lens combination provided by the present invention (the vertex angle of the negative spherical mirror combination prism is along the fourth direction);
fig. 6 is a schematic top view structure diagram of a fourth embodiment of the joint fresnel lens provided by the present invention (the vertex angle of the negative spherical lens joint prism is along the fourth direction).
Reference numerals:
1: a combination Fresnel lens; 2: a lens body; 3: a second pitch;
4: a substrate; 5: a Fresnel working surface; 6: an annular rib;
7: a first pitch;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The combination fresnel lens 1 and eyewear provided by the present invention is described below in conjunction with fig. 1-6.
Any ophthalmic lens intended to be mounted in a spectacle frame is associated with a prescription, which may include the prescription of a sphere, a cylinder and a prism or any combination of the three, which are used to correct the ametropia of the user. Generally, the negative lens is required to be worn for myopia to improve the visual quality to be normal, the positive lens is required to be worn for hyperopia to improve the visual quality to be normal, the positive/negative cylindrical lens is required to be worn for astigmatism to improve the visual quality to be normal, and the prism is required to be worn for partial strabismus to correct. The simple spherical lens comprises a positive spherical lens, a negative spherical lens and a zero-value spherical lens (also called a plano lens, which can be regarded as a special spherical lens, namely the refractive power of the spherical lens is zero), the front surface and the rear surface of the simple spherical lens are spherical lenses, and each meridian of the lens has refractive power and the refractive power in each meridian direction of the lens is equal, so that the correction effect on the people with simple myopia or simple hyperopia is achieved. The simple cylindrical lens is a lens with one surface of the front surface and the back surface being a plane and the other surface being a cylindrical surface, namely, the lens has no refractive power along the cylindrical axis direction, the refractive power along the vertical cylindrical axis direction is the maximum, and the refractive power of the lens surface is gradually changed, so that the correction effect on people with simple astigmatism is achieved. The prism is a lens with a triangular section, and the prism has the function of deflecting the ray to the direction of the prism base so as to achieve the correction function on the people with simple strabismus; a certain prism effect can be replaced by the combination of two prisms, and similarly, the two prisms can be combined into one prism, namely, the corresponding prism amount and the base direction can be obtained by vector addition and subtraction. The correction effect on the people with myopia accompanied astigmatism or hyperopia accompanied astigmatism can be achieved through the form of combining the spherical lens and the cylindrical lens; the sphere lens is combined with the prism, so that the correction effect on the crowd with myopia accompanied by strabismus or the crowd with hypermetropia accompanied by strabismus can be achieved.
A fresnel lens is understood to mean that a continuous surface portion of the lens "collapses" into a plane such that portions of the lens having the ability to deflect light rays are retained and portions of the lens not having the ability to deflect light rays are removed to achieve a reduction in the overall weight of the lens. One surface of the lens surface of the Fresnel lens is a smooth surface, and the other surface is recorded with concentric circular grooves from small to large. The spherical Fresnel lens is formed by a series of sawtooth-shaped convex edges when viewed from the cross section, and when the distance between the convex edges is small enough, each sawtooth can be regarded as a tiny prism; the concentric annular ribs are rotationally symmetrical in plan view. For a Fresnel lens, the refractive power, the groove spacing, the groove depth or the height of the Fresnel lens are in a certain relationship, and when the height is fixed, the diopter decreases with the increase of the spacing between the ridges; with a fixed width, the diopter increases with increasing rib height.
The Fresnel lens in the traditional technology is a single spherical lens Fresnel lens or a cylindrical lens Fresnel lens, and cannot meet the correction requirement of myopia or hyperopia with strabismus or strabismus of a user at the same time. The invention provides a combined Fresnel lens 1, comprising: the lens comprises a lens body 2, wherein the lens body 2 is provided with a Fresnel working surface 5 and a substrate 4 carrying the Fresnel working surface 5, and the diopter of the lens body 2 is the diopter of a sphere joint cylindrical lens or a sphere joint prism; the Fresnel working surface 5 is provided with a plurality of annular ribs 6, the cross section of each annular rib 6 is approximately in a right triangle shape, each annular rib 6 is provided with a first surface inclined to the Fresnel working surface 5, and the first surface is used for refracting light; the fresnel surface 5 has a maximum refractive power direction and a minimum refractive power direction, and the refractive power of the fresnel surface 5 is gradually reduced from the maximum refractive power to the minimum refractive power, and is non-rotationally symmetric. In the technical scheme provided by the invention, the refractive power of the lens main body 2 is formed by the superposition of the refractive power of the substrate 4 and the refractive power of the Fresnel working surface 5, and is used for correcting ametropia.
In the technical solution provided by the present invention, the fresnel working surface 5 involves vector superposition of the spherical lens and the cylindrical lens and vector superposition of the spherical lens and the prism in the non-principal meridian, so that the refractive powers of the regions on the fresnel working surface 5 are different in magnitude and the refractive powers are gradually changed. Therefore, the fresnel surface 5 has a maximum power direction and a minimum power direction, and the power of the fresnel surface 5 is gradually reduced from the maximum power direction to the minimum power direction.
Specifically, when the fresnel working surface 5 is used in combination with a negative cylinder lens or a positive cylinder lens and the cylinder axis of the fresnel working surface 5 extends in a first direction, the refractive powers required for the fresnel working surface 5 are different in each direction, the minimum refractive power direction is the first direction, the maximum refractive power direction is a second direction perpendicular to the first direction, and the refractive powers of the fresnel working surface 5 are gradually increased in the first direction toward the second direction. It can be understood that the fresnel working surface 5 of the negative sphere lens and the negative cylinder lens (positive sphere lens and positive cylinder lens) is a tiny prism in which the maximum refractive power direction and the minimum refractive power direction are perpendicular to each other, and the refractive power of the two directions gradually changes from the maximum refractive power direction to the minimum refractive power direction, and the two directions are continuously changed, that is, the pitch or height or pitch and height of the annular convex rib 6 in the same circle gradually change. The negative spherical lens and the negative cylindrical lens can correct myopia with astigmatism, and the positive spherical lens and the positive cylindrical lens can correct hyperopia with astigmatism.
Similarly, in the case of a positive sphere lens in combination with a negative cylinder lens or a negative sphere lens in combination with a positive cylinder lens, and the cylinder axis extends in the first direction, the maximum refractive power direction is the first direction, the minimum refractive power direction is the second direction, and the refractive power of the fresnel working surface 5 is gradually increased in the second direction toward the first direction.
As previously described, when the interval between the annular ridges 6 is fixed, the diopter increases as the height of the annular ridge 6 increases. Under the condition that the cylindrical lens shaft used for combining the positive spherical lens with the negative cylindrical lens or combining the negative spherical lens with the positive cylindrical lens and the Fresnel working surface 5 extends along the first direction, first intervals 7 are formed among the annular convex ridges 6, and under the condition that the first intervals 7 are equal, the heights of the annular convex ridges 6 are gradually increased from the first direction to the second direction.
Referring to fig. 1-2, in the first embodiment of the present invention (the negative sphere is associated with the negative cylinder and the cylinder axis of the fresnel surface 5 extends along the first direction), the first direction extends along the horizontal direction, and the second direction extends along the vertical direction, since the height of each annular rib 6 increases gradually from the first direction to the second direction, that is, the height of the annular rib 6 in fig. 2 is greater than that of the annular rib 6 in fig. 1. In addition, a rectangular coordinate system is established by taking the center of the lens as an origin, namely, the first direction extends along the x axis, the second direction extends along the y axis, and the height of the annular convex rib 6 is gradually increased from the positive half axis of the x axis to the positive half axis of the y axis in the first quadrant; in the second quadrant, the height of the annular convex edge 6 is gradually reduced from the positive half shaft of the y axis to the negative half shaft of the x axis; in the third quadrant, the height of the annular convex edge 6 is gradually increased from the negative half shaft of the x axis to the negative half shaft of the y axis; in the fourth quadrant, the height of the annular bead 6 gradually decreases from the negative y-axis half axis to the positive x-axis half axis. If the maximum refractive power of the spherical lens is | a |, the maximum refractive power of the cylindrical lens is | b |, the refractive power of the fresnel lens 1 is | a |, the refractive power of the fresnel lens is | a + b |, and the refractive powers are gradually increased from the first direction to the second direction. It should be noted that the dashed lines in fig. 1 and fig. 2 are only labeled schematically and do not represent actual structures.
Similarly, in the case where the cylindrical axis of the fresnel working surface 5 extends in the first direction for the positive sphere-negative cylinder or the negative sphere-positive cylinder, since the maximum refractive power direction and the minimum refractive power direction are opposite to the above-described combination, when the first pitches 7 are equal, the height of each annular ridge 6 is set gradually decreasing from the first direction to the second direction.
Further, in the case where the heights of the annular ridges 6 are equal, the diopter decreases as the first pitch 7 increases. Under the condition that the negative spherical lens is combined with the negative cylindrical lens and the positive spherical lens is combined with the positive cylindrical lens, and the cylindrical lens shaft of the Fresnel working surface extends along the first direction, if the heights of the annular convex edges 6 are equal, the first intervals 7 are arranged in a gradually decreasing mode from the first direction to the second direction, and the annular convex edges 6 are overlooked to form oval convex edges. Referring to fig. 3, in the second embodiment of the present invention (the negative sphere is combined with the negative cylinder, and the cylinder axis extends along the first direction), the thickened circle is the outer edge of the lens in the top view, the inside of the circular area is the visible area of the lens, and the removed circular area is the actual top view of the fresnel working surface 5. With reference to the coordinate system, i.e. the first direction extends along the x-axis and the second direction extends along the y-axis, each first distance 7 decreases from the positive x-axis half axis to the positive y-axis half axis in the first quadrant; in the second quadrant, each first distance 7 gradually increases from the positive y-axis half shaft to the negative x-axis half shaft; in the third quadrant, each first distance 7 gradually decreases from the x-axis negative half shaft to the y-axis negative half shaft; in the fourth quadrant, each first distance 7 increases progressively from the negative y-axis half to the positive x-axis half, i.e. looking down on the lens, each annular rib 6 assumes an elliptical shape.
Approximately, in the case where the cylinder axis of the fresnel working surface 5 extends in the first direction for the positive sphere-negative cylinder or the negative sphere-positive cylinder, since the maximum power direction and the minimum power direction are opposite to the above-described combination, the first pitches 7 are arranged gradually increasing from the first direction to the second direction in the case where the heights of the annular projected ridges 6 are equal.
Another embodiment of the invention is directed to a combination of a sphere and a prism, in the case of a negative sphere combination prism, the prism base direction of the fresnel facet 5 extends in a third direction, the prism apex direction extends in a fourth direction, and the third direction is opposite to the fourth direction. The third direction is a maximum refractive power direction and the fourth direction is a minimum refractive power direction; the refractive power of the Fresnel working surface 5 is gradually reduced from the third direction to the fourth direction, and the lens main body 2 is used for correcting myopia accompanied by strabismus;
approximately, in the case of the prism combined with a positive sphere and the prism vertex angle direction extending in the fourth direction, the third direction is the minimum refractive power direction, the fourth direction is the maximum refractive power direction, the refractive power of the fresnel working surface 5 is gradually increased in the third direction toward the fourth direction, and the lens body 2 is used to correct hyperopia with strabismus.
It should be noted that, since the base direction of the vertical prism does not change through the prism vector addition, that is, the base direction of the vertical prism is only the refractive power required by the positive/negative sphere lens, there is no need to superimpose the refractive power vectors of the positive/negative sphere lens and the prism. In addition, the refractive powers in the same direction are different from the left and right of the optical center after the prism vector addition in the third and fourth directions of the prism, and the maximum refractive power and the minimum refractive power after the addition are respectively constant values, and the refractive power of the fresnel working surface 5 is continuously changed from the third direction to the fourth direction, that is, the pitch or the height or the pitch and the height of the annular convex rib 6 in the same circle are gradually and continuously changed.
As previously described, when the interval between the annular ridges 6 is fixed, the diopter increases as the height of the annular ridge 6 increases. In the technical scheme provided by the invention, under the condition of being used for the negative spherical mirror combined prism, the second space 3 is formed in front of each annular rib 6, and under the condition that the second spaces 3 are equal, the height of each annular rib is gradually reduced from the third direction to the fourth direction through the y-axis direction. Referring to fig. 4-5, in the present embodiment (the negative sphere is associated with the prism, and the vertex angle of the prism is along the fourth direction), a rectangular coordinate system is established by taking the center of the lens as the origin, the third direction extends along the positive half axis of the x-axis, and the fourth direction extends along the negative half axis of the x-axis, since the height of each annular rib 6 is gradually decreased from the third direction to the fourth direction, that is, the height of the annular rib 6 in the positive half axis region of the x-axis in fig. 5 is greater than the height of the annular rib 6 in the negative half axis region of the x-axis, and the height of the annular rib 6 in fig. 4 is between the two. In addition, in the first quadrant, the height of the annular convex edge 6 is gradually reduced from the positive x-axis half shaft to the positive y-axis half shaft; in the second quadrant, the height of the annular convex edge 6 is gradually reduced from the positive half shaft of the y axis to the negative half shaft of the x axis; in the third quadrant, the height of the annular convex edge 6 is gradually increased from the negative half shaft of the x axis to the negative half shaft of the y axis; in the fourth quadrant, the height of the annular bead 6 gradually increases from the negative y-axis half axis to the positive x-axis half axis. If the maximum refractive power of the spherical lens is | a |, the prism refractive power is | b |, the refractive power of the combined fresnel lens 1 in the third direction (x-axis positive half axis) is | a + b |, the refractive power in the fourth direction (x-axis negative half axis) is | a-b |, the refractive power in the y-axis direction is | a |, and the refractive power is gradually decreased from the third direction to the fourth direction through the y-axis direction.
In the case of the prism-prism, the third direction is the minimum refractive power direction, and the fourth direction is the maximum refractive power direction, and when the second pitches 3 are equal, the heights of the annular ridges 6 are gradually increased from the third direction to the fourth direction through the y-axis direction.
With equal height of each annular ridge 6, the optical power decreases with increasing first distance 7. In the fourth embodiment (the vertex angle of the negative sphere combination prism is along the fourth direction) provided by the present invention, under the condition that the heights of the annular convex ridges 6 are equal, the second pitches 3 are gradually increased from the third direction to the fourth direction through the y-axis direction. Referring to fig. 4, as mentioned above, the thickened circle is the outer edge of the lens in the top view, the inside of the circular area is the visible area of the lens, and the removal of the circular area is the actual top view of the fresnel working surface 5. In a first quadrant, each first distance 7 gradually increases from the positive x-axis half shaft to the positive y-axis half shaft with reference to a coordinate system; in the second quadrant, each first distance 7 gradually increases from the positive y-axis half shaft to the negative x-axis half shaft; in the third quadrant, each first distance 7 gradually decreases from the x-axis negative half shaft to the y-axis negative half shaft; in the fourth quadrant, each first distance 7 decreases from the negative y-axis half axis to the positive x-axis half axis.
Similarly, in the case of the prism with a positive spherical mirror, the third direction is the minimum refractive power direction, and the fourth direction is the maximum refractive power direction, and when the heights of the annular ridges 6 are equal, the second pitches 3 are set gradually decreasing from the third direction to the fourth direction through the y-axis direction.
In addition, it should be noted that the base 4 may be a mirror surface with diopter of 0, and when calculating the lens diopter combination, it is not necessary to calculate the diopter of the base 4; the substrate 4 may also be provided as a lens with a certain diopter, and may include any one or more of a simple sphere, a simple cylinder, a simple prism, and a non-refractive power lens. It is to be noted that when the substrate 4 involves a combination of a plurality of lens forms, the substrate is provided in a fresnel form. When calculating the diopter combination of the lens, the diopter of the base 4 and the diopter of the fresnel surface 5 need to be subjected to the vector synthesis operation together.
It should be noted that the dimensions of the figures in the drawings are only schematically set, and do not represent actual dimensions, nor are the dimensional parameters in the drawings set in proportion to actual dimensional parameters.
On the basis of the combined fresnel lens 1, the present invention further provides an eyewear, which includes the combined fresnel lens 1 and a carrier, where the carrier is used for mounting the combined fresnel lens 1, and may be a spectacle frame, and the like, and the present invention is not limited thereto. Since the joint fresnel lens 1 is the main point of the present invention, other structures of the eyewear will not be described in detail in this embodiment.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A fresnel lens combination for use in combination of a sphere and a cylinder or a sphere and a prism, the fresnel lens combination comprising:
the Fresnel lens comprises a lens body and a lens body, wherein the lens body is provided with a Fresnel working surface and a substrate carrying the Fresnel working surface;
the Fresnel working surface is provided with a plurality of annular convex ridges, the cross section of each annular convex ridge is approximately in a right triangle shape, each annular convex ridge is provided with a first surface inclined to the Fresnel working surface, and the first surface is used for refracting light; the Fresnel working surface is provided with a maximum refractive power direction and a minimum refractive power direction, and the refractive power of the Fresnel working surface is gradually reduced from the maximum direction refractive power to the minimum direction refractive power and is non-rotationally symmetrical.
2. A fresnel lens according to claim 1 wherein the optical power of the lens body is formed by the superposition of the optical power of the substrate and the optical power of the fresnel working surface in the form of a thin lens.
3. A fresnel lens combination according to claim 1, wherein, when the cylinder axis of the fresnel working surface extends in a first direction for a positive sphere in combination with a positive cylinder or a negative sphere in combination with a negative cylinder, the minimum power direction is the first direction, the maximum power direction is a second direction perpendicular to the first direction, and the power of the fresnel working surface increases in the first direction toward the second direction; and/or the presence of a gas in the gas,
when the Fresnel working surface is used for combining the positive spherical lens with the negative cylindrical lens or combining the negative spherical lens with the positive cylindrical lens, the cylindrical lens shaft of the Fresnel working surface is extended along the first direction, the maximum refractive power direction is the first direction, the minimum refractive power direction is the second direction, and the refractive power of the Fresnel working surface is increased along the second direction to the first direction.
4. The Fresnel lens combination as claimed in claim 3, wherein when used in conjunction with a positive cylinder for a positive sphere or a negative cylinder for a negative sphere, the annular ridges have a first spacing therebetween, and wherein the first spacing is equal, the annular ridges have a height that increases from the first direction to the second direction; and/or the presence of a gas in the gas,
when the annular convex edge is used for combining the positive spherical lens with the negative cylindrical lens or combining the negative spherical lens with the positive cylindrical lens, the height of each annular convex edge is gradually reduced from the first direction to the second direction under the condition that the first distances are equal.
5. The Fresnel lens combination as claimed in claim 4, wherein, when the height of each of the annular ridges is equal for a positive cylinder and a negative cylinder in combination with a positive sphere and a negative sphere, each of the first pitches is gradually decreased from the first direction to the second direction, and each of the annular ridges has an elliptical shape when viewed from above; and/or the presence of a gas in the gas,
when the annular convex edges are used for combining the positive spherical lens with the negative cylindrical lens or combining the negative spherical lens with the positive cylindrical lens, and the heights of the annular convex edges are equal, the first intervals are gradually increased from the first direction to the second direction, and the annular convex edges are oval when viewed from the top.
6. The fresnel lens combination according to claim 1, wherein when the fresnel working surface is used in a negative spherical mirror combination prism, the prism base direction of the fresnel working surface extends along a third direction, and the prism apex angle direction of the fresnel working surface extends along a fourth direction, the third direction is opposite to the fourth direction, the third direction is a maximum refractive power direction, the fourth direction is a minimum refractive power direction, and the refractive power of the fresnel working surface is gradually decreased along the third direction and the fourth direction;
when the prism apex angle direction of the Fresnel working surface is extended along the fourth direction, the third direction is opposite to the fourth direction, the third direction is the minimum refractive power direction, the fourth direction is the maximum refractive power direction, and the refractive power of the Fresnel working surface is increased along the third direction.
7. The fresnel lens of claim 6, wherein when used in a negative sphere prism combination, each of the annular ridges is preceded by a second pitch, and wherein the height of each of the annular ridges decreases from the third direction to the fourth direction when the second pitch is equal; and/or the presence of a gas in the gas,
under the condition that the second distances are equal and are used for the spherical mirror-integrating prism, the heights of the annular convex ridges are gradually increased from the third direction to the fourth direction.
8. The fresnel lens of claim 7, wherein, for a negative sphere prism combination, the heights of the annular ridges are equal, the second pitches increase from the third direction to the fourth direction; and/or the presence of a gas in the gas,
and under the condition that the heights of the annular convex ridges are equal and the heights of the annular convex ridges are used for the spherical mirror combination prism, the second intervals are gradually reduced from the third direction to the fourth direction.
9. A fresnel lens in combination as claimed in claim 1, wherein the substrate comprises any one or more of a simple sphere, a simple cylinder, a simple prism, a no power lens.
10. An eyewear, comprising:
a joint fresnel lens, the joint fresnel lens being a joint fresnel lens according to any one of claims 1-9; and the number of the first and second groups,
a carrier for mounting the joint Fresnel lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110778244.2A CN113406737A (en) | 2021-07-09 | 2021-07-09 | Combined Fresnel lens and eyewear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110778244.2A CN113406737A (en) | 2021-07-09 | 2021-07-09 | Combined Fresnel lens and eyewear |
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| Publication Number | Publication Date |
|---|---|
| CN113406737A true CN113406737A (en) | 2021-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110778244.2A Pending CN113406737A (en) | 2021-07-09 | 2021-07-09 | Combined Fresnel lens and eyewear |
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| CN (1) | CN113406737A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114137640A (en) * | 2021-11-09 | 2022-03-04 | 江西欧迈斯微电子有限公司 | Free-form surface lens, Fresnel lens and wearable equipment |
-
2021
- 2021-07-09 CN CN202110778244.2A patent/CN113406737A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114137640A (en) * | 2021-11-09 | 2022-03-04 | 江西欧迈斯微电子有限公司 | Free-form surface lens, Fresnel lens and wearable equipment |
| CN114137640B (en) * | 2021-11-09 | 2023-02-03 | 江西欧迈斯微电子有限公司 | Free-form surface lens, fresnel lens and wearable device |
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