CN115327682B - Manufacturing method of glued front piece with large numerical aperture - Google Patents
Manufacturing method of glued front piece with large numerical aperture Download PDFInfo
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- CN115327682B CN115327682B CN202211061576.XA CN202211061576A CN115327682B CN 115327682 B CN115327682 B CN 115327682B CN 202211061576 A CN202211061576 A CN 202211061576A CN 115327682 B CN115327682 B CN 115327682B
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- polishing
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- 238000005498 polishing Methods 0.000 claims abstract description 30
- 239000011347 resin Substances 0.000 claims abstract description 30
- 229920005989 resin Polymers 0.000 claims abstract description 30
- 230000003287 optical effect Effects 0.000 claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 238000013459 approach Methods 0.000 claims description 2
- 238000012545 processing Methods 0.000 abstract description 6
- 238000012797 qualification Methods 0.000 abstract description 6
- 238000002360 preparation method Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 7
- 238000004026 adhesive bonding Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000002950 deficient Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000005304 optical glass Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
Abstract
The invention discloses a manufacturing method of a glued front piece with large numerical aperture, which comprises the following steps: taking an initial lens I, polishing the initial lens I, so that the height of the polished initial lens I is larger than that of the lens I; and (3) injecting liquid optical resin into the arc concave surface on one plane of the polished initial lens, curing the liquid optical resin to obtain an initial double-cemented lens, and polishing the plane of the initial double-cemented lens to obtain the final cemented front piece. The manufacturing method has the advantages of simple preparation process, small processing difficulty, high qualification rate and high production efficiency.
Description
Technical Field
The invention relates to a lens preparation method, in particular to a manufacturing method of a glued front piece with a large numerical aperture.
Background
The front piece of the immersion high resolution microscope generally adopts a double-cemented lens G1 structure shown in fig. 1, the double-cemented lens is formed by fixedly connecting a first lens L1 and a second lens L2, the first lens L1 is a hyper-hemispherical lens manufactured by high refractive index optical glass, the second lens L2 is an ultrathin lens manufactured by an optical glass with refractive index close to that of immersion, and the manufacturing difficulty of the double-cemented lens G1 is very large, specifically: firstly polishing and processing a first lens L1 and a second lens L2 respectively, and then gluing the first lens L1 and the second lens L2 to form a double-glued lens G1. The center thickness of the lens II L2 is generally only 0.2-0.3 mm, the diameter is only 1-2 mm, the lens II L2 is very sharp, polishing and preparing the lens II L2 are very difficult, and meanwhile, the lens I L1 and the lens II L2 are difficult to center when being glued, the qualification rate is very low, and the gluing difficulty is very high. During gluing, the first lens L1 and the second lens L2 need to be centered, that is, the connection line between the center point of the first lens L1 and the center point of the second lens L2 needs to be perpendicular to the plane of the double-glued lens G1, and the plane of the second lens L2 needs to be level with the plane of the first lens L1. The difficulty causes great processing difficulty of the double-cemented lens G1, a large number of defective products are easy to generate in each process link of polishing, centering and cementing, and the rejection rate is high.
Disclosure of Invention
The invention aims to solve the technical problems of providing a manufacturing method of a glued front piece with a large numerical aperture, which aims at overcoming the defects of the prior art, and has the advantages of simple manufacturing process, small processing difficulty, high qualification rate and high production efficiency.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
the manufacturing approach of the glued front piece of a large numerical aperture, glued front piece is the double-glued lens, the double-glued lens includes lens one and lens two, the lens one is the hypersphere lens, and the bottom of lens one has planes, there are arc concave surfaces in the middle part of the plane of lens one, lens two lie in arc concave surface of lens one, the height of the arc concave surface is equal to the height of lens two, lens one and lens two fixedly connect and form the double-glued lens;
the height of the first lens is h1, the height of the second lens is h2, and the positioning height h3 of the pair of arc-shaped concave surfaces of the first lens is the height of the first lens minus the height of the arc-shaped concave surfaces, namely h3=h1-h 2;
the manufacturing method of the glued front piece comprises the following steps:
(1) Taking an initial lens I, polishing the initial lens I to ensure that the height h11 of the initial lens I after polishing is larger than the height h1 of the lens I, the radius of the excircle of the initial lens I after polishing is equal to that of the excircle of the lens I, the radius of the arc-shaped concave surface in the middle of the plane of the initial lens I after polishing is equal to that of the arc-shaped concave surface in the middle of the plane of the lens I, the height h12 of the arc-shaped concave surface in the middle of the plane of the initial lens I after polishing is larger than the height h2 of the lens II, and h 11-h12=h3;
(2) Injecting liquid optical resin into the arc concave surface on one plane of the initial lens, and solidifying the liquid optical resin to obtain the initial double-cemented lens;
(3) And polishing the plane of the initial double-cemented lens to ensure that the height of the initial double-cemented lens is equal to the height h1 of the first lens, wherein the optical resin in the arc-shaped concave surface of the initial double-cemented lens after polishing is the second lens, the height h2 of the second lens, and the initial double-cemented lens obtained after polishing is the final cemented front piece.
As a further improvement, the optical resin is an ultraviolet curing resin; after injecting the liquid optical resin into the arc concave surface on the first lens plane, the liquid optical resin is irradiated with ultraviolet rays to cure the liquid optical resin.
The beneficial effects of the invention are as follows:
the manufacturing method of the glued front piece is simple in manufacturing process, the optical resin is injected into the arc-shaped concave surface on the polished primary lens plane, and the primary double-glued lens plane is polished after the optical resin is solidified, so that the double-glued lens can be directly obtained, the process of independently polishing and manufacturing the secondary lens is omitted, the process of centering the primary lens and the secondary lens during gluing is omitted, the defective rate generated in links such as polishing, centering and gluing in the traditional manufacturing method is reduced, the manufacturing method is low in processing difficulty, high in qualification rate and high in production efficiency.
Drawings
Fig. 1 is a schematic diagram of a double cemented lens structure according to the present invention.
Fig. 2 is a schematic view of the initial lens structure after polishing.
Fig. 3 is a schematic diagram of an initial two-cemented lens structure obtained after curing.
Detailed Description
The following is a further description of embodiments of the invention, with reference to the accompanying drawings:
as shown in fig. 1, the present embodiment provides a method for manufacturing a large numerical aperture cemented front piece, the cemented front piece is a double cemented lens G1, the double cemented lens G1 includes a first lens L1 and a second lens L2, the first lens L1 is a hyper-hemispherical lens, a plane is disposed at the bottom of the first lens L1, an arc concave surface is disposed in the middle of the plane of the first lens L1, the second lens L2 is located in the arc concave surface of the first lens L1, the height of the arc concave surface is equal to the height of the second lens L2, and the first lens L1 and the second lens L2 are fixedly connected to form the double cemented lens G1.
As shown in fig. 1, where the height of the first lens L1 is h1, the height of the second lens L2 is h2, and the positioning height h3 of the first lens L1 to the arc-shaped concave surface is the height of the first lens L1 minus the height of the arc-shaped concave surface, i.e., h3=h1-h 2.
The manufacturing method of the glued front piece comprises the following steps:
(1) Taking an initial lens one. The first initial lens is polished, and the polished first initial lens has a height h11 greater than the height h1 of the first lens L1, as shown in fig. 2, to leave a margin for the subsequent polishing of the plane (i.e., the first initial lens plane S23 in fig. 2). The radius of the polished initial lens one outer circle (i.e., initial lens one outer circle S22 in fig. 2) is equal to the radius of the lens one L1 outer circle, the positioning height of the polished initial lens one pair of arc concave surfaces is equal to the positioning height h3 of the lens one L1 pair of arc concave surfaces, the radius of the polished initial lens one arc concave surface (i.e., initial lens one arc concave surface S21 in fig. 2) is equal to the radius of the arc concave surface in the plane middle of the lens one L1, the height h12 of the polished initial lens one arc concave surface in the plane middle is greater than the height h2 of the lens two L2, and h 11-h 12=h3.
(2) And selecting a liquid optical resin material which meets the refractive index requirement of the lens L2 and can be cured by ultraviolet irradiation (belonging to the prior art).
(3) The initial double cemented lens G11 is obtained by injecting a liquid optical resin into an arc-shaped concave surface on a plane of the polished initial lens, and then irradiating the liquid optical resin with ultraviolet rays to cure the liquid optical resin, as shown in FIG. 3, wherein A is the cured optical resin. Of course, the amount of liquid optical resin added to the arcuate concave surface on a plane of the initial lens is such that: the liquid level of the optical resin is not less than the height of the second lens L2. Typically, the level of the optical resin is substantially level with a plane of the initial lens.
(4) And polishing the plane of the initial double-cemented lens G11 to ensure that the height of the initial double-cemented lens G11 obtained after polishing is equal to the height h1 of the first lens L1, wherein the optical resin in the arc-shaped concave surface of the initial double-cemented lens G11 obtained after polishing is the second lens L2, the height of the second lens L2 is h2, and the qualified double-cemented lens G1 manufacturing process can be finished, and the qualification rate and the production efficiency are far higher than those of the traditional process.
The manufacturing method of the glued front piece is simple in manufacturing process, the initial double-glued lens G11 is obtained by adding liquid optical resin to the arc-shaped concave surface on the first plane of the polished initial lens and then solidifying the arc-shaped concave surface, the plane of the initial double-glued lens G11 is polished, the double-glued lens G1 can be directly obtained, the process of independently polishing and preparing the second lens L2 is omitted, the process of centering when the first lens L1 and the second lens L2 are glued is omitted, the defective rate generated in links such as polishing, centering and gluing in the traditional manufacturing method is reduced, and the manufacturing method is small in processing difficulty, high in qualification rate and high in production efficiency.
The scope of the present invention includes, but is not limited to, the above embodiments, and any alterations, modifications, and improvements made by those skilled in the art are intended to fall within the scope of the invention.
Claims (2)
1. The manufacturing approach of the glued front piece of a large numerical aperture, characterized by that, glued front piece is the double-glued lens, the double-glued lens includes lens one and lens two, lens one is the hypersphere lens, and the bottom of lens one has level, there are arc concave surfaces in the middle part of level of lens one, lens two lie in arc concave surface of lens one, the height of the arc concave surface is equal to the height of lens two, lens one and lens two fixedly connect and form the double-glued lens;
the height of the first lens is h1, the height of the second lens is h2, and the positioning height h3 of the pair of arc-shaped concave surfaces of the first lens is the height of the first lens minus the height of the arc-shaped concave surfaces, namely h3=h1-h 2;
the manufacturing method of the glued front piece comprises the following steps:
(1) Taking an initial lens I, polishing the initial lens I to ensure that the height h11 of the initial lens I after polishing is larger than the height h1 of the lens I, the radius of the excircle of the initial lens I after polishing is equal to that of the excircle of the lens I, the radius of the arc-shaped concave surface in the middle of the plane of the initial lens I after polishing is equal to that of the arc-shaped concave surface in the middle of the plane of the lens I, the height h12 of the arc-shaped concave surface in the middle of the plane of the initial lens I after polishing is larger than the height h2 of the lens II, and h 11-h12=h3;
(2) Injecting liquid optical resin into the arc concave surface on one plane of the initial lens, and solidifying the liquid optical resin to obtain the initial double-cemented lens;
(3) And polishing the plane of the initial double-cemented lens to ensure that the height of the initial double-cemented lens is equal to the height h1 of the first lens, wherein the optical resin in the arc-shaped concave surface of the initial double-cemented lens after polishing is the second lens, the height h2 of the second lens, and the initial double-cemented lens obtained after polishing is the final cemented front piece.
2. The method of manufacturing a large numerical aperture laminated front sheet according to claim 1, wherein the optical resin is an ultraviolet-curable resin; after injecting the liquid optical resin into the arc concave surface on the first lens plane, the liquid optical resin is irradiated with ultraviolet rays to cure the liquid optical resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211061576.XA CN115327682B (en) | 2022-09-01 | 2022-09-01 | Manufacturing method of glued front piece with large numerical aperture |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211061576.XA CN115327682B (en) | 2022-09-01 | 2022-09-01 | Manufacturing method of glued front piece with large numerical aperture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115327682A CN115327682A (en) | 2022-11-11 |
| CN115327682B true CN115327682B (en) | 2024-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211061576.XA Active CN115327682B (en) | 2022-09-01 | 2022-09-01 | Manufacturing method of glued front piece with large numerical aperture |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4895585A (en) * | 1987-09-16 | 1990-01-23 | U.S. Philips Corp. | Method of manufacturing lens elements |
| WO2009132537A1 (en) * | 2008-04-28 | 2009-11-05 | 深圳市大族激光科技股份有限公司 | Optical lens |
| CN205880258U (en) * | 2016-04-13 | 2017-01-11 | 深圳市都乐精密制造有限公司 | Veneer plastics lens |
| JP2019032536A (en) * | 2018-09-05 | 2019-02-28 | マクセル株式会社 | Cemented lens |
-
2022
- 2022-09-01 CN CN202211061576.XA patent/CN115327682B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4895585A (en) * | 1987-09-16 | 1990-01-23 | U.S. Philips Corp. | Method of manufacturing lens elements |
| WO2009132537A1 (en) * | 2008-04-28 | 2009-11-05 | 深圳市大族激光科技股份有限公司 | Optical lens |
| CN205880258U (en) * | 2016-04-13 | 2017-01-11 | 深圳市都乐精密制造有限公司 | Veneer plastics lens |
| JP2019032536A (en) * | 2018-09-05 | 2019-02-28 | マクセル株式会社 | Cemented lens |
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| Publication number | Publication date |
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| CN115327682A (en) | 2022-11-11 |
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