A spiral diopter with meridians of different optical powers

Abstract

Improving spherical, so-called aberration-free optical devices to lengthen the focal region. [Solution] The present invention relates to an optical device having an optical axis, comprising at least one surface having at least two meridians, at least one portion of which, when viewed from the front, forms at least one helical segment whose center point lies on the optical axis, and each helical segment defines meridians of different optical powers such that the resulting focal point extends across a tubular region.

Description

Technical Field

[0001] (Technical Field) The present invention relates to the field of optical devices that form a dioptric interface. It is described in relation to its application to ophthalmic lenses, but the present invention applies to any spherical or toric dioptric interface, and any dioptric interface whose surface has at least two meridians and which can be used for image formation and / or optical power distribution and / or vision correction. Thus, the optical device according to the present invention can be an optical lens of an optical system, an ophthalmic lens, a rigid or soft contact lens, a part of a photographic objective lens, a part of a motion detector, or a device for concentrating light energy.

[0002] Generally, the present invention can be applied to any application where light is focused in the visible or invisible region.

Background Art

[0003]

[0004] (Prior Art)

[0005] Lenses, for example, ophthalmic lenses, have two opposing optical surfaces (referred to as dioptric interfaces) that are connected by an end face inscribed in the base of a cylinder.

[0005] Currently, optical surfaces are generally classified into the following four categories: - Spherical dioptric interfaces, where the surface is part of the inner or outer surface of a sphere ; - Derived from a sphere, where the surface is part of a surface of revolution and its curvature varies from the vertex towards the periphery ​A continuously changing aspherical dioptric interface; - The surface has two orthogonal principal meridians with uneven curvature, and the cross section is along these two meridians. A toric-dioptric interface, nominally circular; - Having two principal meridians on its surface that are perpendicular to each other and have unequal curvature, at least one of which An atoric dioptric interface where the cross-section of the principal meridian is not circular.

[0006] A spherical lens formed by the coupling of two spherical dioptric interfaces. The focal point has a single focal length to a point called the image focus. Focusing is a characteristic of so-called "aberration-free" optical systems. Referring to Figure 1, astigmatism (spherical lens) caused by an optical lens having a toric surface 1 is shown. This brings to mind the well-known principle of the absence of single-point aberration obtained with lenses.

[0007] The toric surface 1 is curved with a first curvature C1 around the axis of rotation of a torus (not shown). The torus has a meridian 2, and the first meridian 2 forms an arc of a first circle defined by the outer radius of the torus. It is designed to be that way. Furthermore, the toric surface 1 has a second meridian 3, and the second meridian 3 is perpendicular to the first meridian 1. And the center of curvature (reference symbol) is located on the radius of the torus passing through the center of the first meridian 2. It curves with a second curvature C2, which is greater than the first curvature, centered around axis AA. Axis AA is This is the optical axis of a toric surface. The lens is formed from an optical material with refractive index n such that light passing through the toric surface 1 is refracted. It is being done.

[0008] Specifically, under parallel illumination light, the light passing through the first meridian 2 converges at the first focal length 4, thereby forming a section 5 parallel to the first meridian 2, and the light passing through the second meridian 3 converges at the second focal length 6, thereby forming a section 7 parallel to the second meridian 3. The toric lens 1 has two dioptric powers D1 and D2 given by the following relationship. D1 = (n - 1)C1, D2 = (n - 1)C2

[0009] U.S. Patent No. US - A - 5198844 discloses a multifocal lens divided into a plurality of alternating sections having at least two different refractive powers. In one embodiment, the boundary between consecutive sections is an arc starting from the center of the lens. This lens is composed only of spherical sections or aspherical sections, and further these sections have ridged surface junctions.

[0010]

[0011]

[0012] <​​​​​​​​​​​​​​​​​​​​​​​One part, when viewed from the front, has at least one spiral segment with its center point on the optical axis forming, and each spiral segment defines meridians of different optical powers, and the focus is not an aberration-free single point but extends over a tubular region extending along the optical axis, regarding an optical device is.

[0014] "When viewed from the front" here, and in the context of the present invention, means looking at the device along the optical axis. That is, it is a matter of how it looks when projected onto a plane orthogonal to the optical axis is.

[0015] For clarity, the spiral surface portion is defined by being projected onto a plane orthogonal to the optical axis The spiral segment according to the present invention is a problem of a spiral because it is developed on a three-dimensional surface is.

[0016] Therefore, the present invention essentially has, from the surface of a dioptric interface having two or more meridians, a surface having at least one spiral segment, that is, a surface that generates a spiral shape when projected onto a plane orthogonal to the optical axis is. That is, the present invention essentially generates a dioptric interface having a spiralization of a surface having two meridians

[0017] In other words, the present invention essentially generates a dioptric interface having a spiralization of a surface having two meridians is.

[0018] In a sense, if a surface having two or more meridians is in a flexible state, this surface will be twisted and deformed along one or more spiral curves. This spiralization can also be applied to an aspherical dioptric interface surface having two or more meridians is.

[0019] The helication is preferably carried out on a toric surface, and more preferably on a surface where the meridians are opposite each other. That is, it is performed with an optical device having two concentric ring-shaped bodies that are at a 90° angle to each other.

[0020] In the case of a toric surface, this distributes light to a first focal length via the curvature of a first meridian. The light is directed and distributed to the second focal length via the curvature of the second meridian. Meanwhile, the astigmatism axis... The spiralization forms a spiral-shaped focal light tube, resulting in dioptric i This has the effect of increasing the focal length of the interface.

[0021] The helical segment according to the present invention is, for example, governed by linear laws, quadratic laws, or substantially logarithmic laws. According to certain laws, optical devices can have different shapes. These various laws apply to optical devices. They may be combined on the same plane. For example, logarithm in the first annular segment of the lens Having a law, the second annular segment of the lens surrounds the first annular segment, and is secondary or linear. A lens with a specific shape can be obtained.

[0022] The helical segment according to the present invention is only a part of the dioptric interface. It may be formed as follows: a central part, two independent surfaces (for example, two toric surfaces) ) may be formed only at the joint between them, or around the periphery.

[0023] The tubular focus obtained by the present invention maintains the same state over a long range of focal lengths. It is a focus that is maintained and is inscribed within the tube.

[0024] The present invention has many advantages, including the following: - Objective lenses for photography, cameras, projectors, and virtual reality. In all optical image forming systems, such as headsets, the need for focus adjustment is... It can be reduced. - For example, by removing the motorized focusing device currently in use, the optical image The size of the formation system can be reduced. - Used in systems that concentrate optical power, such as solar heating systems and laser cutting devices. This is possible. For example, in a laser cutting device, a tubular focus can be used to direct light. The length of the focal region along the axis can be increased, and as a result, the thickness that can be cut can be increased. It is possible. - Optical detection systems such as infrared motion detectors and physical measurement systems It can be used, and the length of the sharp area due to tubular focus can be adjusted to control the focus. It advantageously reduces the need for it. - In applications to vision correction, tubular focusing allows for sharp areas over a long focal length range. It is possible to generate lenses that can provide both near and far vision with a single eye lens, and correct presbyopia and other vision problems. Many refractive errors can be optically corrected. In this way, one ophthalmic lens can be used to correct multiple refractive errors. It can be used for refractive anomalies. Also, the tubular focus allows for outward rotation from the optical axis. It can improve the focus of incoming light rays and enhance the field of view. This is especially true for ophthalmic lenses. This could be put to use. Light having one surface generated by helication according to the present invention Lenses can extend focal lengths, especially those that are difficult to achieve.

[0025] Generally, optical devices that implement the present invention are used, for example, in photography, videography, optical detection, and visual perception. Image formation applications such as force correction, and other applications that require focus. It can be used in applications.

[0026] Optical devices, especially lenses, can be made from any optical material such as optical glass or polymers. It is possible.

[0027] One or more helical segments according to the present invention are manufactured using machining, additive manufacturing, or molding techniques. These technologies can be used or combined to manufacture the product.

[0028] According to one advantageous embodiment, one or more helical segments are curved at a first non-zero curvature. It has a first curved meridian and a second meridian that is curved with a second curvature that is strictly greater than the curvature of the first meridian. It is generated from a toric surface, and the second meridian is perpendicular to the first meridian.

[0029] According to this embodiment and advantageous modified embodiments, one or more helical segments are first The first toric surface is generated from the second toric surface, and the axis of rotation of the first torus is A first meridian curved at the center with a first non-zero curvature, and a second curve that is strictly greater than the first curvature. It has a second meridian that is curved at a certain rate, the second meridian being perpendicular to the first meridian, and the second to The Lick surface is a first meridian curved with a first non-zero curvature around the rotation axis of the second torus and It curves with a second curvature that is strictly greater than the first curvature, and perpendicular to the first meridian of the second toric surface. It has a straight second meridian, and the first and second toric planes are centered on the optical axis, respectively. It has multiple azimuth sectors arranged on the first toric plane, the first meridian and the second The first meridian of the toric surface is in the azimuthal direction, which is at a non-zero angle relative to the optical axis. The spiral segment has the first meridian of the first toric plane and the second toric plane. Define the first and second optical power meridians arising from the first meridian.

[0030] According to one modified embodiment, the azimuthal sector of the first toric plane and the second toric plane The azimuth sectors are adjacent via the ends of the spiral segments.

[0031] The first toric surface and the second toric surface are two surfaces that face each other in the diametrical direction. It may have a positional angle sector.

[0032] Each angular sector of the first toric surface is adjacent to two angular sectors of the second toric surface. It's fine if you do that.

[0033] According to one favorable feature, the first meridian of the first toric surface and the second meridian of the second toric surface The angles between the azimuthal directions of meridians 1 range from 60° to 90°.

[0034] Preferably, the first curvature of the first toric surface is equal to the first curvature of the second toric surface. stomach.

[0035] More preferably, the second curvature of the first toric surface is the second curvature of the second toric surface and equal.

[0036] According to one modified embodiment, the radius of the helical segment is determined in polar coordinates by a linear law. The angles of the spiral are related by quadratic or logarithmic laws. According to another embodiment, the optical device further has a spherical surface centered on the optical axis. Yes, they are.

[0037] The optical device according to the present invention preferably has at least one helical segment An optical lens can be formed with the surface facing forward.

[0038] Another subject of the present invention is to correct vision, to concentrate luminescence power, and / or Alternatively, one could use optical devices as described above to form an image. [Brief explanation of the drawing]

[0039] Other advantages and features of the present invention will be described in detail with reference to the following figures, detailing embodiments of the present invention. However, this will become clearer if you read a non-restrictive explanation. [Figure 1] Figure 1 is a schematic diagram showing the distribution of parallel light passing through a toric optical lens. [Figure 2] Figure 2 is a schematic front view showing a first embodiment of a tubular focus optical lens. [Figure 3] Figure 3 is a schematic front view of a multifocal optical lens having two toric surfaces facing each other in the axial direction. [Figure 4] Figure 4 is a schematic perspective view of the multifocal optical lens shown in Figure 3. [Figure 5] Figure 5 is a schematic diagram showing the distribution of parallel light that has passed through the optical lenses shown in Figures 3 and 4. [Figure 6] Figure 6 is a schematic front view of one embodiment of a multifocal optical lens having two toric surfaces facing each other in the axial direction. [Figure 7] Figure 7 is a schematic front view of one embodiment of the tubular focus lens according to the present invention, generated from the lens shape of Figure 6. [Figure 8] Figure 8 is a schematic front view of another embodiment of a multifocal optical lens having two toric surfaces facing each other in the axial direction. [Figure 9] Figure 9 is a schematic front view of another embodiment of the tubular focus lens according to the present invention, generated from the lens shape of Figure 8. [Figure 10] Figure 10 is a schematic profile diagram showing the distribution of a parallel light beam that has passed through the optical lens according to the present invention, compared with a spherical optical lens according to the prior art. [Figure 11] Figure 11 is a schematic perspective view of a beam of parallel light rays passing through an optical lens according to the present invention having a logarithmic spiral, and Figure 11 shows the tubular region at the focus of the light rays. [Figure 12] Figure 12 is an enlarged view of the light ray focusing tube in Figure 11, and is compared with the focal region of a lens with axially opposed toric surfaces shown in Figure 6. [Figure 13] Figure 13 is a front view showing a modified embodiment of a tubular focus lens according to the present invention, having a spherical central portion and a spiral peripheral portion. [Figure 14] Figure 14 is a front view showing another modified embodiment of the tubular focus lens according to the present invention, having two toric surfaces and a helical joint between them. [Modes for carrying out the invention]

[0040] (Detailed explanation) Figure 1, which relates to prior art, has already been explained in the preamble. Therefore, below The details are not explained.

[0041] The following figures show some examples of optical lenses according to the present invention, extending into a tubular region Having two or more meridians, each having at least one spiral segment that generates focus. It possesses the ability to do so.

[0042] As can be seen from various diagrams, spiral segments are, for example, governed by linear laws, quadratic laws, and These can be generated in various ways, essentially following the laws of logarithms. These may be combined within the same lens, for example, in the first annular segment of the lens. It has a logarithmic method, and the second annular segment of the lens surrounds the first annular segment, and is quadratic. Or it may have linear laws.

[0043] Some optical devices may have multiple helical segments. Figure 2 shows a tubular focus optical lens 800 according to the first embodiment of the present invention. The representation shown uses contrast to indicate distance in the direction perpendicular to the plane of the figure, with darker colors indicating greater distance. The further away from the reader and the brighter the image, the closer it is to the reader. As shown in Figure 1, optics Lens 800 is generated by the helication of the toric surface of the lens. The center point is 806. Thus, the shape of surface 801 has a spiral with its center point 806 on the optical axis. The angle of the spiral increases as it moves radially away from the optical axis. In particular, having the first curvature The first meridian 802 further has a spiral shape centered on the optical axis. Furthermore, Figure 1 In toric lenses, the line 803, which has a second curvature and is parallel to the second meridian, is different. It has an azimuthal direction, and the direction of the line changes depending on the distance from the optical axis due to its spiral shape. .

[0044] In fact, in order to realize the present invention, after analyzing the shortcomings of prior art multifocal lenses, Akira explored extending the focal area along the optical axis.

[0045] Starting with a multifocal lens having two concentric toric surfaces, we move them axially. I considered pitting it against the other side.

[0046] Figures 3 and 4 show a front view and a perspective view of such a multifocal optical lens 100. The point optical lens 100 has a first toric surface 102 and a second toric surface concentrically surrounding the first surface 102. It is equipped with a hard surface 104.

[0047] Therefore, when the lens 100 is viewed axially along the optical axis AA, the first surface 102 is the first optical Corresponding to the region, the second surface 104 corresponds to a second optical region that is concentric with the first surface 102.

[0048] The first toric surface 102 is curved by a first meridian 1021 with a first curvature and by a second curvature The plane has a second meridian 1022 perpendicular to the first meridian 1021. Similarly, the second plane 104 has a second meridian 1022 perpendicular to the first meridian 1021. A first meridian 1041 curved with a curvature of , and a second meridian curved with a second curvature and perpendicular to the first meridian 1041. It has the meridian 1042. In particular, in each of the first and second faces 102, 104, the second The curvature is greater than the first curvature.

[0049] The peripheral edges of the first and second surfaces 102 and 104, respectively, have a circular cross-section. The first meridian 1021 of the first plane 102 is perpendicular to the first meridian 1041 of the first plane 104.

[0050] The first curvature of the first surface 102 may be different from or equal to the first curvature of the second surface 104. Similarly, the second curvature of the first surface 102 may be different from the second curvature of the second surface 104. They can be equal.

[0051] Thus, the lens 100 is composed of two concentric ring-shaped bodies having different meridian axes. These are particularly opposed or in an anti-axial form, that is, between two ring bodies. The angle is 90°.

[0052] Figure 5 shows that the first curvature of the first surface is equal to the first curvature of the second surface, and the second curvature of the first surface In an example where the ratio is equal to the second curvature of the second surface, the multifocal optical lens 10 under parallel illumination light This is a diagram showing the distribution of light that has passed through 0. Light that has passed through the first meridian 1021 of the first plane 102 is It converges at a focal length of 106, thereby forming a first section 1081 parallel to the first meridian 1021. The light, having passed through the second meridian 1022 of the first plane 102, converges at the second focal length 110, and the second A second section 1082 is formed parallel to the meridian 1022.

[0053] Furthermore, the light that has passed through the first meridian 1041 of the second surface 104 converges at the first focal length 106, and This forms a first section 1121 parallel to the first meridian 1041, and the second of the second surface 104 Light passing through meridian 1042 converges at a second focal length of 110, thereby passing through the second meridian 1042. A parallel second section 1122 is formed.

[0054] Therefore, the focal area obtained with such a lens 100 is the same as that of a prior art multifocal lens. It becomes longer than the focal region. This elongated focal region depends on the torus of planes 102 and 104.

[0055] Since it was found that this focal region was not sufficiently focused, the inventors then used the surface By spiraling the image, a focus is obtained that concentrates on the tubular region, thereby allowing the optical axis to be aligned. The idea was to enable focusing over a long distance.

[0056] Figures 6 and 7 show a tubular focus optical lens 200, which has two opposing axial toes. Those having a toric surface and those having double toric surfaces that are spirally opposed to each other in the axial direction. Each embodiment is shown. The optical lens 200 in Figure 6 is a first torus that is curved with a first curvature around the rotation axis of the first torus. Meridian 2021 and a second curve that is greater than the first curvature and perpendicular to the first meridian 2021 A first toric surface 202 having a meridian (represented by a circular arc 2022 parallel to the second meridian) It is equipped with. In addition, the optical lens 200 is positioned alongside the first toric surface 202 and the second torus The first meridian 2041 is curved with a first curvature around the axis of rotation, and the first meridian is curved with a second curvature. It has a second meridian perpendicular to meridian 2041 (represented by an arc 2042 parallel to the second meridian). It has a second toric surface 204. When viewed from the front, that is, the center 206 of the lens 200. When projected onto a projection plane perpendicular to the optical axis passing through, the first toric surface 202 faces radially opposite, Furthermore, two azimuth sectors 208 intersect at their vertices, which are directed toward the center 206 of the optical lens 200. Corresponding to 2 and 2084. Similarly, the second toric surface 204 is radially opposed, and These correspond to the two azimuth sectors 2081 and 2083 that intersect at the vertices pointed towards the center 206. Each azimuth sector 2082, 2084 of the first toric surface 202 is the same as the two of the second toric surface 204. It is adjacent to the azimuth sectors 2081 and 2083. The angular sector 208 is adjacent to the first toric plane 202 and It is enclosed by the intersection of the second toric surface 204, which is two circles with perpendicular axes of rotation. These are the intersection lines in the space between the rings in the cylindrical cross-section. These intersection lines correspond to azimuth sectors 2081 and 2082. , represented by the boundary lines 2101, 2102, 2103, and 2104 between 2083 and 2084. Each boundary line 2101, 2102, 2103, and 2104 is set in the optical axis direction relative to the first meridian 2021 and 2041. It is positioned with a backslide.

[0057] Figure 7 shows the optical lens 200 produced by the helication of the toric lens surface in Figure 6. Thus, the first meridian 2021 of the first toric surface 202 and the first child of the second toric surface 204 Meridian 2041 is a helical segment whose center point 206 lies on the optical axis of the optical lens 200. Similarly, each of the boundary lines 2101, 2102, 2103, and 2104 has its center point 206 at the light of the optical lens 200. It is a spiral segment located on the axis.

[0058] The spiralized segment follows, for example, linear laws, quadratic laws, or substantially logarithmic laws. It can be generated in various ways. In order to apply the logarithmic law, the angle of the spiral is mathematical The part of the lens that diverges to the target, close to the center 206, needs to be simplified.

[0059] In the embodiment shown in Figure 7, the angle of increase reaches 45° at the peripheral edge 25 of the optical lens 200. This angle is It can have other values, for example, ranging from 30° to 720°, and is particularly equal to 60°. The peripheral portion 25 of the optical lens 200 here has a circular shape. That's good too.

[0060] Figures 8 and 9 show a tubular focus optical lens 400, which has two opposing axially oriented lenses. Those having a toric surface and those having double toric surfaces that are spirally opposed to each other in the axial direction. Each embodiment is shown.

[0061] The optical lens 400 of the tubular focus in Figure 8 is designed similarly to the optical lens 200 in Figure 6. However, instead of four azimuth sectors, it has three separate azimuth sectors 401, 402, and 403. Each azimuthal sector 401, 402, and 403 is oriented towards the respective first meridian 4011, It has toric surface segments having 4021 and 4031, and is symmetrical as shown in the figure. In this case, they are 120° apart. The second meridian is not shown here, but in what case Even in this case, they are perpendicular to the first meridian. The azimuth sectors 401, 402, and 403 are bounded by boundary line 40 It is enclosed in a circle with the number 5.

[0062] Figure 9 shows the tubular focus lens 400 generated from the lens surface of Figure 8. The spiral segment follows the law of quadratic helixization, and the angle of the spiral is centered on the optical axis. It is proportional to the square of the radial distance from 406. Each of the boundary lines 405 and the principal meridian 4011 Each of 4021 and 4031 has the same helical shape. In the embodiment shown in the figure, optical lens At the periphery of 400, the spiral angle reaches 360° (i.e., it completes one rotation). In the case of the lens, it is possible to rotate it twice (i.e., to an angle of 720° or more).

[0063] As a numerical example, the optical lens 400 of the tubular focus in Figure 9 has four identical toric lenses. We have implemented a frontend with branches, and its parameters are as follows: - First curvature of the toric surface: corresponds to a focal length of 17.4 cm. - Second curvature of the toric surface: Equivalent to a focal length of 14 cm - The focal points are separated by 1.4 diopters each. - Spiral Shape: From Logarithmics to the Golden Ratio - Spiral angle: 720° - Lens diameter: 10mm - Other geometric parameters: The rear surface is spherical with a radius of curvature of 7.8 mm. The thickness of the central part of lens 400. The gap is equal to 0.5 mm.

[0064] Generally, the tubular focusing optical lenses according to the present invention each have one azimuth sector Using any number of toric surfaces that occupy the area, one of the illustrated optical lenses 200, 400, and 800 It can be designed similarly. In this way, the toric beam of the helical surface distributed around the optical axis The number of lunches must be even (for example, 2 lunches for optical lens 800, 4 lunches for optical lens 200). It may be a (C) or an odd number (for example, 3 branches for optical lens 400). Other branch counts are also possible, for example, 5, 6, 7, or more. Furthermore, the boundary between adjacent toric surfaces may be a steep boundary, or a stepped boundary. It can also be a boundary. For example, by interpolating the local curvature near the boundary, adjacent to This allows for a gentler transition between rick surfaces and limits extreme inclines.

[0065] The tubular focus obtained by the present invention is a combination of the spherical optical lens 1301 of the prior art and the present invention. As shown in Figure 10, this is a comparison with the tubular focus optical lens 1302 according to the invention. Each of these two lenses, 1301 and 1302, is designed for vision correction. In Figure 10, , parallel illumination light is incident on lenses 1301 and 1302, and Z is on both sides of the object focus of the lens. This shows the range of sharpness perceived by the human eye. Figure 10 clearly illustrates this. Thus, the lens 1302 having a spiral shape has a sharpness region Z enclosed by a virtual right cylinder. This allows for lengthening of the tubular shape of the light ray through the spiralization of various optical powers. Focus can be obtained. In other words, in the prior art spherical lens 1301, two One of the dioptric interfaces is a helical toric interface according to the present invention. When replaced with surface 1302, this has the effect of lengthening the focal region. In this case, The normal field of view is no longer a point, but a focusing tube.

[0066] The inventors performed ray tracing calculations for parallel illumination light. Figure 11 shows a ray tracing calculation similar to that in Figure 9. This shows the lens 400 positioned at the object's focal point. The upper part of Figure 12 shows an enlarged view of the focal region XV. This is shown.

[0067] Furthermore, Figure 12 shows the focal lengths D1 and D2 corresponding to the first and second curvatures of the initial toric surface. These are shown respectively. On the right side of Figure 12, line 1501 indicates the size of the focal spot at D1. Line 1502 indicates the size of the focus spot in the D2.

[0068] For comparison, the lower part of Figure 12 has the same curvature as the initial one in Figure 11, and, as in Figure 6, axially The same elements for opposing astigmatism lenses are shown, with line 1511 showing the focal spot at D1. The line indicates the size of the spot, with line 1512 showing the size of the focus spot on the D2.

[0069] As is clear from Figure 12, the helicalization of the lens according to the present invention creates a focal spot between D1 and D2. This effectively compresses it into the shape of a right cylindrical cylinder.

[0070] Other modifications and advantages of the present invention can be realized without departing from the scope of the present invention. .

[0071] In the illustrated embodiment, the spiral segment is made to cross the optical surface of the lens. However, it is also possible to spiralize only a part of it.

[0072] Figure 13 shows that the optical lens 300 includes a spherical surface 302 positioned at the center of the optical surface of the lens 300, and a screw This shows a modified example in which spiral segments are generated only at the periphery of the optical surface.

[0073] Figure 14 shows an optical lens 100 having two concentric toric surfaces 102 and 104, relating to the present invention. This shows a modified example having a spirally formed joint 114.

[0074] The present invention is not limited to the embodiments described herein, but in particular, the illustrated The features of the embodiments can be combined in modified examples that are not shown.

Claims

1. Optical devices having an optical axis (100, 200, 400, 800), Having at least one surface having at least two meridians, At least one of these parts, when viewed from the front, has its center point (206, 406, 806) aligned with the optical axis. Forming at least one spiral segment on top, Each helical segment has different optics such that the resulting focal point extends across the tubular region. An optical device that defines the meridian of target power.

2. The one or more helical segments include a first meridian curved with a first non-zero curvature, and the first A second meridian (202) curved with a second curvature that is strictly greater than the curvature of the first meridian. 2 , 803) and Generated from a lic surface, The optical device according to claim 1, wherein the second meridian is perpendicular to the first meridian.

3. The one or more helical segments are generated from the first and second toric surfaces, The first toric surface (208 2 , 401) is the first non-zero axis around the rotation axis of the first torus The first meridian curved by curvature (202 1 ,401 1 ) and a second curvature that is strictly greater than the first curvature The second meridian curved by a certain rate (202 2 ) and The second meridian is perpendicular to the first meridian, and the second toric plane (208 1 ,402) is , the first meridian (204) curved with a first non-zero curvature around the axis of rotation of the second torus 1 ,402 1 ) and curved with a second curvature that is strictly greater than the first curvature, and the first toric surface of the second toric surface The meridian (204 1 ) and a second meridian (204 2 ) perpendicular to it, and The first and second toric surfaces each have multiple azimuth angles arranged around the optical axis. Equipped with sectors, The first toric surface (208 2 The first meridian (202) of 401) 1 ,401 1 ) and the second Tori Black surface (208 1 The first meridian (204) of 402) 1 ,402 1 ) is not zero with respect to the optical axis. It has directional directions separated by angles, The helical segment is the first meridian (208) of the first toric surface. 2 , 401) and The first meridian of the second toric surface (208 1 The first and second optical powers arising from , 402) - Meridian (202 1 ,401 1 , 204 1 The optical device according to claim 2, which defines , 4021).

4. The azimuth sector of the first toric surface (208 2 ) and the azimuthal angle sector of the second toric surface. The segment (2081) is adjacent via a spiral segment boundary line (210) as described in claim 3. Optical devices (200, 400).

5. The first toric surface (208 2 ,208 4 ) and the second toric surface (208 1 ,208 3 ) is that Each comprises two radially opposing azimuth sectors, the light according to claim 3 or claim 4. Academic device (200).

6. The first toric surface (208 2 ,208 4 Each angular sector of the second toric surface (20 8 1 ,208 3 The optical device (200) according to claim 5, adjacent to the two angular sectors of the aforementioned ) ）。

7. The first toric surface (208 2 The first meridian and the second toric plane (20) 8 1 The angles between the azimuthal directions of the first meridian (402) are between 60° and 90°. or the optical device (200, 400) according to any one of claims 3 to 6.

8. The first toric surface (208 2 The first curvature of the 401) is the second toric surface (208 1 , The optical device according to any one of claims 3 to 7, which is equal to the first curvature of 402) S (200, 400).

9. The first toric surface (208 2 The second curvature of the 401) is the second toric surface (208 1 , The optical device according to any one of claims 3 to 8, which is equal to the second curvature of 402) vinegar.

10. The radius of the spiral segment in polar coordinates follows linear, quadratic, or logarithmic laws. Therefore, the optical device according to any one of claims 1 to 9, which relates to the angle of the helix ( 200、400、800）。

11. The method described in any one of claims 1 to 10 further comprises a spherical surface (302) centered on the optical axis. Optical devices.

12. An optical lens is formed with a front surface having at least one helical segment. , the optical device (200, 400, 800) according to any one of claims 1 to 11.

13. To correct vision, and / or to concentrate light power, and / or to paint An optical device for forming an image, according to any one of claims 1 to 12 (200, 400, 800 ) Use.

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