CN113820790A - Micro optical collimator lens structure and manufacturing method - Google Patents
Micro optical collimator lens structure and manufacturing method Download PDFInfo
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- CN113820790A CN113820790A CN202111257260.3A CN202111257260A CN113820790A CN 113820790 A CN113820790 A CN 113820790A CN 202111257260 A CN202111257260 A CN 202111257260A CN 113820790 A CN113820790 A CN 113820790A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
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- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention relates to the field of optical communication technology, in particular to a micro optical collimator lens structure and a manufacturing method thereof. The lens structure of the micro optical collimator is made of three sections of optical fiber communication wave bands made of materials with different refractive indexes, has better coupling efficiency compared with a lens structure directly made of a single-layer glass material, and the residual layer in the manufacturing method is formed together with the spherical second lens or the inclined first lens, so that the demolding is easy, the bonding property of the spherical surface or the inclined surface and a substrate material is increased, the manufacturing cost is greatly reduced, and the manufacturing efficiency is improved.
Description
Technical Field
The invention relates to the field of optical communication technology, in particular to a micro optical collimator lens structure and a manufacturing method thereof.
Background
With the rapid development of the optical fiber communication industry, the international demand for optical passive devices is also sharply increased. In the working process of optical devices such as an optical isolator, an optical circulator, an optical switch, an optical wavelength division multiplexer and the like, the requirement on the collimation of a Gaussian beam is very high, the optical fiber collimator is produced at the same time, and a lens is an important part of the optical fiber collimator.
The collimator lens is different from the common lens in that a material with high refractive index in an optical fiber communication waveband is adopted, and the collimator lens has the function of transmitting an optical fiber signal to the coupling lens and improving the coupling efficiency of an optical device after passing through the self-aligning coupling lens. The conventional spherical lens is manufactured by a cold machining process, the process is more and complicated, and the yield is low.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a micro optical collimator lens structure and a manufacturing method thereof.
The invention is realized by the following technical scheme:
the utility model provides a miniature optical collimator lens structure, includes first lens, substrate material and the second lens that sets gradually, the optic fibre communication wave band of first lens, substrate material and second lens has different refracting indexes, first lens and second lens are made by the optics impression glue.
Preferably, the first lens is in a slope structure, and an upper caliber of a slope of the first lens is smaller than or equal to a lower caliber of the slope.
Preferably, the second lens is in a spherical structure.
Preferably, the spherical aperture of the second lens is smaller than the diameter of the inscribed circle of the base material.
Preferably, the surfaces of the first lens and the second lens are both provided with a coating film.
Preferably, the coating film is an antireflection film.
Preferably, the first lens and the second lens have a residual layer at one end close to the base material.
A method for manufacturing a lens structure of a micro optical collimator comprises the following steps:
s1, selecting a substrate material, a first lens and a second lens with proper material thickness according to requirements;
s2, coating the optical imprinting glue of the first lens on a substrate material, and imprinting by using a mold;
s3, coating the optical imprinting glue of the second lens on the opposite side of the substrate material and the first lens, and imprinting by using a mold;
and S4, cutting according to the requirement to obtain the micro optical collimator lens structure.
Preferably, in the imprinting process of S2, the residual layer is molded together with the bevel structure of the first lens;
in the S3 imprint process, the residual layer is molded together with the spherical structure of the second lens.
Preferably, after the completion of the imprinting in S2 or S3, the mold release baking treatment is performed.
Preferably, the plurality of micro-optical collimator lens structures after being integrally imprinted are arranged in a matrix form.
Compared with the prior art, the invention has the following beneficial effects:
the lens structure of the micro optical collimator is made of three sections of optical fiber communication wave bands made of materials with different refractive indexes, and has better coupling efficiency compared with a lens structure directly made of a single-layer glass material. The first lens and the second lens which are made of the optical imprinting glue are beneficial to reducing the cost, and the manufacturing efficiency of the optical fiber collimating lens is improved.
Furthermore, the arrangement of the spherical structure and the inclined plane structure is convenient for matching the tail fiber.
Further, the upper caliber of the inclined plane is smaller than or equal to the lower caliber of the inclined plane, so that the optical performance of optical design is met, and convenience is provided for processing, such as easy demolding during stamping demolding.
Furthermore, the antireflection film is used for reducing stray light, so that the reflection loss is reduced in the coupling lens, and the coupling efficiency of the system is improved.
The invention provides a method for manufacturing a micro optical collimator lens structure, which provides a mass production mode.
Furthermore, the residual layer and the spherical second lens or the inclined first lens are molded together, so that the bonding property of the spherical surface or the inclined surface and the substrate material is increased, the manufacturing cost is greatly reduced, and the manufacturing efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of a micro-optical collimator lens structure according to the present invention.
FIG. 2 is a schematic arrangement diagram of a micro-optical collimator lens structure of the micro-optical collimator according to the present invention.
FIG. 3 is a schematic diagram of a micro-optical collimator lens structure according to the present invention showing a chamfer.
In the figure, 1, a base material; 2. a first lens; 3. a second lens; 4. a residual layer; 5. and (6) chamfering.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
A micro optical collimator lens structure, referring to FIG. 1, comprises a first lens 2, a substrate material 1 and a second lens 3 which are arranged in sequence, wherein optical fiber communication wave bands of the first lens 2, the substrate material 1 and the second lens 3 have different refractive indexes, and the first lens 2 and the second lens 3 are made of optical imprinting glue. The substrate material 1 may be glass, resin, plastic, polymer material, photosensitive adhesive, thermosetting adhesive, etc., in this embodiment, the substrate material 1 is glass, and the lens structure is cylindrical.
The first lens 2 is in an inclined plane structure, and the inclined plane upper caliber of the first lens 2 is smaller than or equal to the inclined plane lower caliber. The bevel angle can select different angles according to the design, and the angle range of the bevel is 6-8 degrees to ensure that the first lens meets the optical design requirement.
The second lens 3 can be a spherical surface, an aspheric surface, a free-form surface, a special-shaped surface, etc., in this embodiment, the second lens 3 is in a spherical structure, the spherical aperture of the second lens 3 is smaller than the diameter of the inscribed circle of the substrate material, and the difference is 0.4-0.6 mm.
The outer sides of the first lens 2 and the second lens 3 are both provided with coating films, the coating films can be replaced according to needs, and the coating films can be antireflection films, narrow-band films, high-pass films, low-pass films, double wave crests, semi-transparent semi-reflective films and the like, so that different requirements are met. In this embodiment, the coating film is an antireflection film, which is used to reduce stray light, so that reflection loss is reduced in the coupling lens, and coupling efficiency of the system is increased.
The first lens 2 and the second lens 3 are provided with a residual layer 4 at one end close to the substrate material 1, different residual layers 4 are matched according to the substrate materials with different refractive indexes and the optical imprinting glue so as to meet the design requirement of optical transmission, and the thickness of the residual layers is about 30-50 mu m.
The end surfaces of the first lens 2 and the second lens 3 close to the substrate material 1 can be provided with patterns or diaphragms to meet different use requirements.
The lens structure of the micro optical collimator is made of three sections of optical fiber communication wave bands made of materials with different refractive indexes, and has better coupling efficiency compared with a lens structure directly made of a single-layer glass material. The first lens 2 and the second lens 3 made of the optical imprinting glue are beneficial to reducing the cost, improving the manufacturing efficiency of the optical fiber collimating lens, particularly realizing miniaturization, and saving a larger space for the installation of a user.
A method for manufacturing a lens structure of a micro optical collimator comprises the following steps:
s1, selecting a substrate material 1, a first lens 2 and a second lens 3 which are made of appropriate materials and have appropriate thicknesses according to requirements, wherein the substrate material is 6-inch or 8-inch glass, and mass production is facilitated;
s2, coating the optical imprinting glue of the first lens 2 on the substrate material 1, and imprinting by using a mold; in the imprinting process, the residual layer 4 and the inclined surface structure of the first lens 2 are molded together, and demolding and baking are carried out after imprinting so as to realize solidification of the first lens 2 and the substrate material 1;
s3, coating the optical imprinting glue of the second lens 3 on the opposite side of the substrate material 1 and the first lens 2, and imprinting by using a mold; the residual layer 4 is molded together with the spherical structure of the second lens 3; demolding and baking after imprinting to realize curing of the second lens 3 and the substrate material 1; referring to fig. 2, the plurality of micro optical collimator lens structures after imprinting are arranged in a matrix manner;
and S4, cutting according to the requirement to obtain the micro optical collimator lens structure, wherein the cutting can be a combination of laser cutting, mechanical cutting, cutting and grinding. The cutting in the embodiment is cylindrical, the outer diameter is 1.7-1.9 mm, the height is about 2.1-2.5 mm, and compared with the traditional cold machining process, the cutting device can be used for manufacturing smaller lenses and can also be used for batch production.
Referring to fig. 3, the first lens 2 is chamfered 5 on the optical surface and the plane, and the optical surface, so that the lens structure of the micro optical collimator can be trimmed, and the smoothness is improved.
The manufacturing method of the lens structure of the micro optical collimator provides a mass production mode, the residual layer 4 and the spherical second lens 3 or the inclined first lens 2 are molded together, demolding is easy, the bonding property of the spherical surface or the inclined surface and a substrate material is increased, the manufacturing cost is greatly reduced, and the manufacturing efficiency is improved.
Claims (10)
1. The lens structure of the micro optical collimator is characterized by comprising a first lens (2), a substrate material (1) and a second lens (3) which are sequentially arranged, wherein optical fiber communication wave bands of the first lens (2), the substrate material (1) and the second lens (3) have different refractive indexes, and the first lens (2) and the second lens (3) are made of optical imprinting glue.
2. The micro-optical collimator lens structure according to claim 1, wherein the first lens (2) is a slant surface structure, and the slant surface upper aperture of the first lens (2) is smaller than or equal to the slant surface lower aperture.
3. The micro-optical collimator lens structure of claim 1, wherein the second lens (3) is a spherical structure.
4. The micro-optical collimator lens structure according to claim 3, wherein the spherical aperture of the second lens (3) is smaller than the diameter of the inscribed circle of the base material (1).
5. The micro-optical collimator lens structure according to claim 1, wherein the surfaces of the first lens (2) and the second lens (3) are provided with a coating.
6. The micro-optic collimator lens structure of claim 5, wherein the coating is an antireflection coating.
7. The micro-optical collimator lens structure according to claim 1, wherein the first lens (2) and the second lens (3) leave a residual layer (4) at one end close to the base material (1).
8. A method for manufacturing a lens structure of a micro optical collimator is characterized by comprising the following steps:
s1, selecting a substrate material (1), a first lens (2) and a second lens (3) with proper materials and thicknesses according to requirements;
s2, coating the optical imprinting glue of the first lens (2) on the substrate material (1), and imprinting by using a mold;
s3, coating the optical imprinting glue of the second lens (3) on the opposite side of the substrate material (1) and the first lens (2), and imprinting by using a mold;
and S4, cutting according to the requirement to obtain the micro optical collimator lens structure.
9. The method of claim 8, wherein the residual layer (4) is formed together with the bevel structure of the first lens (2) during the stamping process of S2;
in the S3 imprint process, the residual layer (4) is molded together with the spherical structure of the second lens (3).
10. The method as claimed in claim 8, wherein the plurality of micro-optical collimator lens structures after being integrally stamped are arranged in a matrix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111257260.3A CN113820790A (en) | 2021-10-27 | 2021-10-27 | Micro optical collimator lens structure and manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111257260.3A CN113820790A (en) | 2021-10-27 | 2021-10-27 | Micro optical collimator lens structure and manufacturing method |
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| Publication Number | Publication Date |
|---|---|
| CN113820790A true CN113820790A (en) | 2021-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111257260.3A Pending CN113820790A (en) | 2021-10-27 | 2021-10-27 | Micro optical collimator lens structure and manufacturing method |
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| Country | Link |
|---|---|
| CN (1) | CN113820790A (en) |
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2021
- 2021-10-27 CN CN202111257260.3A patent/CN113820790A/en active Pending
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