CN1164957C - Pseudospherical collimation microlens for optic fibre collimator - Google Patents
Pseudospherical collimation microlens for optic fibre collimator Download PDFInfo
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- CN1164957C CN1164957C CNB021120978A CN02112097A CN1164957C CN 1164957 C CN1164957 C CN 1164957C CN B021120978 A CNB021120978 A CN B021120978A CN 02112097 A CN02112097 A CN 02112097A CN 1164957 C CN1164957 C CN 1164957C
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- microlens
- optical fiber
- sphere
- fiber collimator
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Abstract
The present invention discloses a pseudo-spherical collimation microlens for an optic fiber collimator, which has a pseudo-spherical lateral end surface, a columnar side surface and another inclined end surface. The present invention has the advantages that a plurality of segments of coaxial spherical surfaces of different curvatures or circular conical surfaces of different inclination angles are combined to form the pseudo-spherical lateral end surface of the pseudo-spherical collimation microlens; the surface-shaped outline of the pseudo-spherical collimation microlens approaches to a specified non-spherical surface in order to eliminate image errors caused by a spherical lens to the utmost extend so that insertion losses are reduced to a level approaching to the insertion losses of the non-spherical microlens. Besides, the pseudo-spherical lateral end surface is easily processed, and the cost of the pseudo-spherical lateral end surface approaches to cost of a cheap spherical collimating lens. In sum, the present invention has the advantages of favorable collimating characteristic, low insertion loss, favorable off-axis performance, long working distance, low cost, etc., and can be processed in the tiny microlens. The present invention can be widely used in optical communication and other relevant fields.
Description
Technical field
The present invention relates to the optical element that uses in a kind of optical-fibre communications, the important component part in particularly a kind of optical fiber collimator: the counterfeit sphere collimation microlens that is used for optical fiber collimator.
Background technology
Optical fiber collimator is widely used in the optical communication passive device as independent component: the divergent beams that source optical fiber can be sent with a collimating apparatus convert parallel beam to, so that various passive devices such as isolator, circulator, photoswitch etc. are handled light signal effectively, again with another collimating apparatus with the beam convergence handled well to receiving on the optical fiber, make light signal be coupled into reception optical fiber losslessly, continue transmission and go down.As shown in Figure 4, the typical optical fiber collimator of tradition is fixedly made by joint sleeve 43 by optical fiber head 41 and collimation lens 42.Wherein, collimation lens 42 is key components of optical fiber collimator, is divided into refraction the different of end surface shape by material type: gradual index lens (grin lens), aspherical microlens, spherical microlens or the like.
At present, collimation lens relatively more commonly used is gradual index lens (grin lens).When a branch of light when major axes orientation is injected grin lens because lens material this on the direction of principal axis that hangs down, have the graded profile of refractive index, deviation will take place with the gradual change of refractive index in light beam smoothly.By optimal design, can realize collimation or focusing satisfactorily to light beam to material gradually changed refractive index situation and lens sizes.In the past, grin lens becomes the collimation lens of standard with its excellent collimation property, compact external form assembling, high coupling efficiency.But also there is limitation in it, and such as from the axle poor performance, operating distance is short, cost an arm and a leg or the like.
And aspherical microlens because good from the axle performance, operating distance is long, it is used more and more widely.But aspheric shape processing is relatively more difficult.The aspherical microlens size that is used for optical communication is little, and requirement on machining accuracy is high again, has only external minority producer to provide in batches at present, and price is the several times of spherical lens.Because this reason, people adopt the low-cost substitute products of spherical microlens as aspherical microlens recently more and more.Spherical lens has most advantages of non-spherical lens as, operating distance length good from the axle performance, collimation function admirable or the like, and the processing of spherical lens is very simple, cheap.But, owing to have unavoidable optical aberration during single sphere imaging, thus through the spherical microlens collimation and the light beam after focusing on can't have no loss ground and be coupled into reception optical fiber fully, cause the loss of light signal like this, promptly insert the increase of loss.
Summary of the invention
The purpose of this invention is to provide a kind of counterfeit sphere collimation microlens that is used for optical fiber collimator, make the aspheric surface collimation lens of its serviceability, and processing cost is near cheap sphere collimation lens near function admirable.
It has fake ball shape vertical axial end, cylindrical lateral surface and another inclined end face.
Advantage of the present invention is: be combined to form the said vertical axial end of fake ball shape that is used for the counterfeit sphere collimation microlens of optical fiber collimator by the coaxial sphere of multistage different curvature or the circular conical surface of different angle, its face shape profile is near specific aspheric surface, to eliminate the aberration that spherical lens causes as far as possible, make the insertion loss be reduced to the level that approaches aspherical microlens.Simultaneously, the vertical axial end of said fake ball shape is easy to processing, and cost is near cheap sphere collimation lens.Integrate, the counterfeit sphere collimation microlens that the present invention is used for optical fiber collimator has good collimation property, extremely low insertion loss,, advantage such as operating distance long, with low cost good from the axle performance, and can be processed into small-sized lenticule, can be widely used in optical communication and other association areas.
Description of drawings
Fig. 1 is traditional sphere collimation microlens synoptic diagram;
Fig. 2 is used for a kind of typical embodiment figure (the coaxial sphere by two sections different curvature is combined into the vertical axial end of fake ball shape) of the counterfeit sphere collimation microlens of optical fiber collimator for the present invention;
Fig. 3 is used for the another kind of typical embodiment figure (circular conical surface by one section sphere and two sections different inclination angle is combined into the vertical axial end of fake ball shape) of the counterfeit sphere collimation microlens of optical fiber collimator for the present invention;
Fig. 4 is traditional sphere collimating apparatus synoptic diagram;
Fig. 5 is used for the counterfeit sphere collimation microlens of optical fiber collimator for the present invention a kind of typical case embodies a kind of optical fiber collimator that (the coaxial sphere by two sections different curvature is combined into the vertical axial end of fake ball shape) constituted;
Fig. 6 is used for the counterfeit sphere collimation microlens of optical fiber collimator for the present invention another kind of typical case embodies the another kind of optical fiber collimator that (circular conical surface by one section sphere and two sections different inclination angle is combined into the vertical axial end of fake ball shape) constituted.
Embodiment
The above-mentioned counterfeit sphere collimation microlens that is used for optical fiber collimator has fake ball shape vertical axial end, cylindrical lateral surface and another inclined end face.Lens material is the homogeneous refractive index optical material.Fake ball shape hang down axial end by the coaxial sphere 23 of multistage different curvature and 24 or the circular conical surface 33 and 34 of different angle be combined to form, and perpendicular to the main shaft of the counterfeit sphere collimation microlens that is used for optical fiber collimator.Inclined end face face shape is the plane, and its normal becomes 12 ° of angles of 6 ∽ with the said main shaft that is used for the counterfeit sphere collimation microlens of optical fiber collimator.Vertical axial end of fake ball shape and inclined end face plate anti-reflection film.
More than be used for the processing of the counterfeit sphere collimation microlens of optical fiber collimator can be fully with reference to the process technology of traditional spherical lens, as long as the grinding and polishing Mould Machining is become the combination of the circular conical surface of the coaxial sphere of multistage different curvature or different angle.
Specific implementation process is described below:
At first,, determine the aspheric surface of optimum working performance, and then be identified for combination near the vertical axial end face shape of this aspheric fake ball shape by the optical theory design.It can be combined to form by the coaxial sphere of multistage different curvature or the circular conical surface of different angle, and is easy to processing.For example, shown in Figure 2 23 and 24 is that hang down a kind of typical case of axial end of said fake ball shape embodies, and is combined into the fake ball shape axial end of hanging down by the coaxial sphere 23 and 24 of two sections different curvature; Shown in Figure 3 33 and 34 for hang down another typical case of axial end of fake ball shape embodies, and is combined into the fake ball shape axial end of hanging down by the circular conical surface 34 of one section sphere 33 and two sections different inclination angle.
After the face shape array mode decision of the vertical axial end of fake ball shape, manage to make do the grinding and polishing mould of the vertical axial end of this fake ball shape of hand-made work.As everyone knows, why aspheric surface is difficult to processing, be that mainly the grinding and polishing mould with its aspherical shape of equal value is difficult to accurately make, and the combination of the circular conical surface of coaxial sphere that the vertical axial end of said fake ball shape is the multistage different curvature or different angle, the grinding and polishing mould with its face shape of equal value can be made easily by traditional handicraft fully.Such as, with the vertical axial end 23 and 24 of a kind of typical fake ball shape shown in Figure 2 is example, it is combined by the coaxial sphere 23 and 24 of two different curvature, the making of its grinding and polishing mould can be finished the processing of peripheral deep camber sphere 24 face shapes of equal value earlier by traditional handicraft, grind out the face of equal value of small curvature radius sphere 23 again at the center of this big sphere mould, the face shape of promptly finishing the vertical axial end grinding and polishing mould of whole fake ball shape is made, and its manufacture difficulty is easy to processing near traditional sphere mould.
After the grinding and polishing mould of the vertical axial end of fake ball shape has been arranged, can be by traditional lenticule job operation, make the said counterfeit sphere collimation microlens cylindrical lateral surface 12 that is used for optical fiber collimator earlier, the fake ball shape that grinds and polish out the counterfeit sphere collimation microlens that is used for optical fiber collimator again with the mould of its face shape of equal value hang down axial end 23 and 24 or 33 and 34 and inclined end face 11.At last, can hang down to the fake ball shape of the counterfeit sphere collimation microlens that is used for optical fiber collimator axial end 23 and 24 or 33 and 34 and inclined end face 11 plating anti-reflection films.Like this, promptly make the counterfeit sphere collimation microlens that the present invention is used for optical fiber collimator.
The counterfeit sphere collimation microlens and the existing optical fiber head 41 that the present invention who makes are used for optical fiber collimator are fixing by existing joint sleeve 43 gummeds, promptly make by the present invention and be used for the optical fiber collimator that the counterfeit sphere collimation microlens of optical fiber collimator constitutes, specifically as shown in Figure 5 and Figure 6.Fig. 5 is used for the counterfeit sphere collimation microlens of optical fiber collimator for the present invention a kind of typical case embody 52 with existing optical fiber head 41 by the fixing a kind of optical fiber collimator that is constituted of existing joint sleeve 43 gummeds, the counterfeit sphere collimation microlens 52 that the typical case is used for optical fiber collimator is combined to form the fake ball shape axial end of hanging down by the coaxial sphere of two sections different curvature.Fig. 6 is used for the counterfeit sphere collimation microlens of optical fiber collimator for the present invention another kind of typical case embody 62 with existing optical fiber head 41 by the fixing another kind of optical fiber collimator that is constituted of existing joint sleeve 43 gummeds, the counterfeit sphere collimation microlens 62 that another typical case is used for optical fiber collimator is combined to form the fake ball shape axial end of hanging down by the circular conical surface of one section sphere and two sections different inclination angle.
Claims (5)
1. counterfeit sphere collimation microlens that is used for optical fiber collimator, it is characterized in that it has fake ball shape vertical axial end, cylindrical lateral surface and another inclined end face, the vertical axial end of said fake ball shape is combined to form by the circular conical surface (34) of one section sphere (33) and two sections different inclination angle.
2. a kind of counterfeit sphere collimation microlens that is used for optical fiber collimator according to claim 1 is characterized in that said lens material is the homogeneous refractive index optical material.
3. a kind of counterfeit sphere collimation microlens that is used for optical fiber collimator according to claim 1 is characterized in that the main shaft of the vertical axial end of said fake ball shape perpendicular to the counterfeit sphere collimation microlens that is used for optical fiber collimator.
4. a kind of counterfeit sphere collimation microlens that is used for optical fiber collimator according to claim 1 is characterized in that said inclined end face face shape is the plane, and its normal becomes 6～12 ° of angles with the main shaft of the counterfeit sphere collimation microlens that is used for optical fiber collimator.
5. a kind of counterfeit sphere collimation microlens that is used for optical fiber collimator according to claim 1 is characterized in that vertical axial end of said fake ball shape and inclined end face plate anti-reflection film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021120978A CN1164957C (en) | 2002-06-13 | 2002-06-13 | Pseudospherical collimation microlens for optic fibre collimator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021120978A CN1164957C (en) | 2002-06-13 | 2002-06-13 | Pseudospherical collimation microlens for optic fibre collimator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1385713A CN1385713A (en) | 2002-12-18 |
| CN1164957C true CN1164957C (en) | 2004-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021120978A Expired - Fee Related CN1164957C (en) | 2002-06-13 | 2002-06-13 | Pseudospherical collimation microlens for optic fibre collimator |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105807371A (en) * | 2014-12-30 | 2016-07-27 | 福州高意通讯有限公司 | High power isolator |
| CN115437045B (en) * | 2022-10-10 | 2023-08-15 | 香港理工大学深圳研究院 | Micro lens |
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2002
- 2002-06-13 CN CNB021120978A patent/CN1164957C/en not_active Expired - Fee Related
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| CN1385713A (en) | 2002-12-18 |
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