CN217954862U - Out-of-focus lens - Google Patents
Out-of-focus lens Download PDFInfo
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- CN217954862U CN217954862U CN202222347591.2U CN202222347591U CN217954862U CN 217954862 U CN217954862 U CN 217954862U CN 202222347591 U CN202222347591 U CN 202222347591U CN 217954862 U CN217954862 U CN 217954862U
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Abstract
A defocusing lens defines an optical axis and comprises a light incident surface and an arc-shaped concave surface opposite to the light incident surface. The arc-shaped concave surface comprises a central area and a peripheral area surrounding the central area. The peripheral area defines an upper peripheral portion and a lower peripheral portion by taking the optical axis as a boundary, at least one of the upper peripheral portion and the lower peripheral portion is provided with a first surface portion and a plurality of second surface portions which are connected with the first surface portion and are arranged at intervals, and the curvature radius of the first surface portion is smaller than that of the second surface portions.
Description
Technical Field
The utility model relates to an optical lens especially relates to a out of focus lens.
Background
Referring to fig. 1, the conventional peripheral myopic defocus lens 8 includes a light-incident convex surface 81 and an arc-shaped concave surface 82 spaced apart from the light-incident convex surface 81. The convex light-entering surface 81 has a central optical area 811 and a peripheral area 812 surrounding the central optical area 811. The peripheral region 812 is formed with a microlens structure 80. The microlens structure 80 includes a plurality of microlenses 800 arranged in concentric circles. Referring to FIG. 2, the method for preparing the peripheral myopic out-of-focus lens includes introducing lens-forming components into a forming device and allowing the lens-forming components to cure. The molding apparatus includes a first mold 91 and a second mold 92. The first mold 91 includes an arc-shaped convex surface 911 for correspondingly forming the arc-shaped concave surface 82 of the peripheral myopic out-of-focus lens 8. The second mold 92 comprises an arc-shaped concave surface 921 for correspondingly forming the light-in convex surface 81 of the peripheral myopic out-of-focus lens 8, and the arc-shaped concave surface 921 has a plurality of grooves 920 arranged in concentric circles. The convex arc surface 911 of the first mold 91 and the concave arc surface 921 of the second mold 92 cooperate to define a cavity for accommodating the lens-forming components. The user can grind the second mold 92 through a grinding member such as sandpaper, etc., so that the arc-shaped concave surface 921 having the groove 920 can be formed.
Although the peripheral myopic out-of-focus lens 8 has the advantage of preventing the retina from being elongated and deformed due to the fact that the imaging position exceeds the retina, thereby effectively controlling the deepening degree of the myopic degree, in the preparation method of the peripheral myopic out-of-focus lens, the problem that the forming is difficult due to the difficulty in accurately controlling the sinking degree (namely, curvature) exists in the process of generating the groove 920 by the arc-shaped concave surface 921 of the second die 92, and therefore the yield of the peripheral myopic out-of-focus lens 8 is difficult to improve.
Disclosure of Invention
An object of the utility model is to provide a defocus lens.
The utility model discloses out of focus lens defines out an optical axis, and contains the income plain noodles and with the relative arc concave surface that sets up of this income plain noodles. The arc-shaped concave surface comprises a central area and a peripheral area surrounding the central area. The peripheral area defines an upper peripheral portion and a lower peripheral portion by taking the optical axis as a boundary, at least one of the upper peripheral portion and the lower peripheral portion is provided with a first surface portion and a plurality of second surface portions which are connected with the first surface portion and are arranged at intervals, and the curvature radius of the first surface portion is smaller than that of the second surface portion.
Out of focus lens, this lower peripheral part has this first surface portion and the second surface portion.
The defocusing lens of the present invention, the second surface portions are divided into several groups, and the groups are arranged along a radial direction, and the second surface portions of each group are jointly matched to form a semi-arc distribution.
Out of focus lens, should go up each in peripheral portion and this lower peripheral portion and have this first surface portion and the second surface portion.
Out of focus lens, should go up peripheral portion the second face portion and this lower peripheral portion the second face portion distributes with the concentric circles mode jointly cooperatees.
The defocusing lens of the utility model is a convex-concave lens.
The utility model has the advantages that: compare in the design of peripheral myopia out of focus lens's microlens structure formation on this income light convex surface in the past the utility model discloses in the out of focus lens, see through this go up peripheral portion and this lower peripheral portion in at least one have this first surface portion reach the second surface portion, and the curvature radius on this first surface portion is less than the curvature radius's on second surface portion design, in the preparation method of this out of focus lens, produce the technology on second surface portion can control and easy shaping relatively simply and accurately, based on this, the utility model discloses the yield of out of focus lens is higher than the yield of peripheral myopia out of focus lens in the past.
Drawings
FIG. 1 is a perspective view illustrating a conventional peripheral myopic out-of-focus lens.
FIG. 2 is a side sectional view illustrating a first mold and a second mold of a molding apparatus for producing conventional peripheral myopic out-of-focus lenses.
Fig. 3 is a side view illustrating a first embodiment of the defocused lens of the present invention;
FIG. 4 is a side sectional view taken along line IV-IV of FIG. 3 illustrating the out-of-focus lens of the first embodiment;
fig. 5 is a partially enlarged side sectional view illustrating a second surface portion of the out-of-focus lens of the first embodiment;
FIG. 6 is an enlarged partial side sectional view illustrating a first mold and a second mold of a molding apparatus for producing an out-of-focus lens of the first embodiment and a second surface portion generated by an arc-shaped convex surface of the first mold; and
fig. 7 is a side view illustrating a second embodiment of the defocused lens of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
Referring to fig. 3 to 5, a first embodiment of the defocused lens of the present invention is used in cooperation with an eyeball and defines an optical axis 10. In the first embodiment, the defocus lens is a lens for spectacles and is a convex-concave lens.
The defocused lens comprises a light incident surface 1 and an arc concave surface 2 which is arranged opposite to the light incident surface 1 and is close to the eyeball.
The concave surface 2 includes a central optical zone 21 and a peripheral zone 22 surrounding the central optical zone 21. The central optical zone 21 is used to image a target on the retina of the eye. The peripheral region 22 is used to image the target object in front of the retina of the eyeball.
The peripheral region 22 defines an upper peripheral portion 221 and a lower peripheral portion 222 with the optical axis 10 as a boundary. At least one of the upper perimeter portion 221 and the lower perimeter portion 222 has a first surface portion 201, and a plurality of second surface portions 202 connected to the first surface portion 201, and a radius of curvature of the first surface portion 201 is smaller than a radius of curvature of the second surface portions 202. Referring to fig. 5, the curvature of the first surface 201 of the defocused lens is shown by the imaginary line in fig. 5, and the first surface 201 is substantially an arc surface, and compared with the first surface 201, the second surface 202 is substantially a plane, that is, the curvature of the first surface 202 is larger than that of the second surface 202, by such design, the second surface 202 can endow the defocused lens with the advantage of avoiding the problems of retina elongation and deformation caused by the image position exceeding the retina, thereby effectively controlling the deepening degree of the myopia. In the first embodiment, the lower peripheral portion 221 has the first surface portion 201 and the second surface portion 202. The second surface portions 202 are divided into groups 20, and the groups 20 are arranged along a radial direction, and the second surface portions 202 in each group 20 are jointly fitted in a semi-arc distribution.
Referring to fig. 6, the method for preparing the defocused lens of the first embodiment comprises introducing lens-forming components into a molding device and curing the lens-forming components. The molding apparatus includes a first mold 31 and a second mold 32. The first mold 31 includes an arc convex surface 311 for correspondingly forming the arc concave surface 2 of the out-of-focus lens. The convex arc 311 has a first surface portion 301 corresponding to the first surface portion 201 of the focusing lens, and a plurality of second surface portions 302 connecting the first surface portion 301 and corresponding to the second surface portion 202 of the focusing lens. The second mold 32 includes a molding surface 321 corresponding to the light incident surface 1 of the defocused lens. The convex surface 311 of the first mold 31 and the molding surface 321 of the second mold 32 cooperate to define a cavity for accommodating the lens-forming components. The user can grind the first mold 31 through a grinding member such as sandpaper, etc., so that the arcuate convex surface 311 having the second surface portion 302 can be formed.
The utility model discloses in the out-of-focus lens, see through this last peripheral part 221 and this lower peripheral part 222 at least one have this first surface portion 201 and the second surface portion 202, and the curvature radius of this first surface portion 201 is less than the curvature radius's of second surface portion 202 design, in this out-of-focus lens's preparation method, produce at the arc convex surface 311 of first mould 31 second surface portion 302 is simple relatively and easy accurate control in the shaping, on the basis of this, the utility model discloses out-of-focus lens has the advantage that the yield is high.
Referring to fig. 7, a second embodiment of the defocusing lens of the present invention is substantially the same as the first embodiment, and the main differences are: in the second embodiment, each of the upper peripheral portion 221 and the lower peripheral portion 222 has the first surface portion 201 and the second surface portion 202. The second surface portion 202 of the upper peripheral portion 221 and the second surface portion 202 of the lower peripheral portion 222 are cooperatively and concentrically arranged.
Claims (6)
1. A defocused lens defines an optical axis and comprises a light incident surface and an arc concave surface arranged opposite to the light incident surface, wherein the arc concave surface comprises a central area and a peripheral area surrounding the central area; the method is characterized in that: the peripheral area defines an upper peripheral portion and a lower peripheral portion by taking the optical axis as a boundary, at least one of the upper peripheral portion and the lower peripheral portion is provided with a first surface portion and a plurality of second surface portions which are connected with the first surface portion and are arranged at intervals, and the curvature radius of the first surface portion is smaller than that of the second surface portions.
2. The defocused lens of claim 1, wherein: the lower peripheral portion has the first surface portion and the second surface portion.
3. The defocused lens of claim 1, wherein: the second surface portions are divided into groups, and the groups are arranged in a radial direction, and the second surface portions in each group are collectively fitted in a semi-arc distribution.
4. The defocused lens of claim 1, wherein: each of the upper and lower peripheral portions has the first and second surface portions.
5. The defocused lens of claim 1, wherein: the second surface portion of the upper peripheral portion and the second surface portion of the lower peripheral portion are cooperatively and concentrically distributed.
6. The defocused optic of claim 1, wherein: the defocusing lens is a convex-concave lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222347591.2U CN217954862U (en) | 2022-09-05 | 2022-09-05 | Out-of-focus lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222347591.2U CN217954862U (en) | 2022-09-05 | 2022-09-05 | Out-of-focus lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217954862U true CN217954862U (en) | 2022-12-02 |
Family
ID=84211336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222347591.2U Active CN217954862U (en) | 2022-09-05 | 2022-09-05 | Out-of-focus lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217954862U (en) |
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2022
- 2022-09-05 CN CN202222347591.2U patent/CN217954862U/en active Active
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