CN210427971U - Optical collimator - Google Patents

Abstract

The utility model provides an optical collimator, include: the sensor units are mutually bonded; the sensor unit includes: a plurality of core materials; a first black absorbing layer adhered between adjacent ones of the cores; and a second black absorption layer adhered between adjacent sensor cells. The utility model discloses avoid the optical collimator who forms to appear light leak, the problem of light crosstalk in the use, improve the optical collimator's that forms performance.

Description

Optical collimator

Technical Field

The utility model relates to the field of optical technology, concretely relates to optical collimator.

Background

The optical collimator is an important basic device for optical fiber communication, sensing and laser. In many applications, a laser beam is input from an optical fiber or an optical waveguide, expanded by an optical collimator, and then converted into a collimated beam with a small divergence angle, and the collimated beam propagates in a free space, is processed by other optical elements, and is coupled to an optical fiber or an optical waveguide of another optical collimator.

Existing optical collimators typically include: transparent core material of equidimension diameter is arranged according to equidistant size, fills black absorbed layer between core material and the core material to play the filterable effect of light collimation. The problems of light leakage and light crosstalk often occur in the use process of the optical collimator, and the use performance of the optical collimator is reduced, so that the use of the optical collimator is limited.

How to ensure that the optical collimator cannot generate light leakage and light crosstalk in the using process and cannot influence the performance of the formed optical collimator is a problem which needs to be solved urgently at present.

SUMMERY OF THE UTILITY MODEL

The utility model provides a problem provide an optical collimator avoids optical collimator to appear light leak, the defect that light is crosstalked at the in-process that uses, improves optical collimator's performance.

In order to solve the above problem, the utility model provides an optical collimator, include: a plurality of sensor units, each of which is bonded to each other; the sensor unit includes: a plurality of core materials; a first black absorbing layer adhered between adjacent ones of the cores; and a second black absorption layer adhered between adjacent sensor cells.

Optionally, the thickness of the second black absorption layer is 5-20 microns.

Optionally, the material of the second black absorbing layer is one or more of glass, an organic material, or carbon fiber.

Optionally, the second black absorbing layer is adhered between adjacent sensor cells by heat treatment.

Optionally, the process parameters of the heat treatment include: the fusion pressing pressure is 0.3-0.8 MPa, the fusion pressing time is 2-12 hours, the fusion pressing temperature is 500-700 ℃, the annealing temperature is 400-800 ℃, and the annealing time is 24-72 hours.

Optionally, the thickness of the first black absorption layer is 1-3 micrometers.

Optionally, the core material is a transparent cylindrical structure and is made of glass or plastic.

Optionally, the first black absorbing layer is adhered between adjacent core materials by means of melt pressing, injection molding or chemical deposition.

Optionally, the sensor unit is prism-shaped.

Compared with the prior art, the technical scheme of the utility model have following advantage:

a second black absorption layer is adhered between a plurality of adjacent sensor units, so that the problems of light leakage and light crosstalk of the formed optical collimator in the using process are avoided, and the using performance of the formed optical collimator is improved. The second black absorbing layer is adhered between the adjacent sensor units, and can absorb redundant light transmitted between the adjacent sensor units, so that the problem of light crosstalk between the adjacent sensor units is prevented; the second black absorption layer has the characteristics of softness and easy adhesion, and is convenient for adjacent sensor units to be adhered together, so that light leakage generated between gaps of the adjacent sensor units is avoided, the phenomenon of light leakage is avoided, and the service performance of the formed optical collimator is improved; meanwhile, the optical collimator comprises a plurality of sensor units, the sensor units are mutually bonded, each sensor unit comprises a plurality of core materials and a first black absorption layer adhered between the adjacent core materials, on one hand, the optical collimator is bonded together through the plurality of sensor units, the cross section area of the formed optical collimator is not limited by equipment, and the process limitation is broken through; on the other hand, when the optical collimator is damaged, only the damaged leaflet device unit needs to be checked out, the damaged leaflet device unit is discarded, the whole optical collimator does not need to be discarded, and resources and cost are saved.

Drawings

FIGS. 1-4 are schematic diagrams illustrating various processes for forming an optical collimator according to an embodiment;

fig. 5 is a top view of an optical collimator according to an embodiment of the present invention;

FIG. 6 is a perspective view of the corresponding optical collimator of FIG. 5;

FIG. 7 is a cross-sectional view taken along line A-A of FIG. 5;

fig. 8 is a top view of a sensor unit in another embodiment of the invention.

Detailed Description

The optical collimator formed at present has the defects of light leakage and light crosstalk, the service performance of the optical collimator is influenced, the application of the optical collimator is limited, and the specific forming process refers to fig. 1 to 4.

Referring first to fig. 1, a core material 100 is provided, the core material 100 being a cylinder of transparent glass or plastic.

Referring to fig. 2, the black absorbing layer 110 is interposed between adjacent core materials 100.

Fig. 2 is a schematic view of a relationship between a part of the core material 100 and the black absorbing layer 110.

Referring to fig. 3 to 4, a plurality of the core materials 100 are heat-treated, and adjacent black absorbing layers 110 are adhered together, so that a plurality of the core materials 100 are adhered together to form an optical collimator.

FIG. 3 is a top view of FIG. 2 after heat treatment; fig. 4 is a cross-sectional view of fig. 3 taken along line a-a.

The inventor finds that the optical collimator formed by the method has the defects of light leakage and light crosstalk, cannot meet the working requirement and limits the use of the optical collimator. This is because the thickness of the black absorbing layer 110 on the outer wall of the core material 100 is small, and the fusion effect between the black absorbing layer and the core material is poor, which causes a problem of light leakage in the gap between adjacent core materials 100, so that the optical collimator formed has a defect of light leakage, and since the thickness of the black absorbing layer 110 formed on the outer wall of the core material 100 is too small, light that would have penetrated only a specific core material 100 is caused, and since the black absorbing layer 110 is too thin, light at the edge of the core material 100 cannot be absorbed, so that light enters into adjacent core materials 100, which causes a problem of light crosstalk between adjacent core materials 100. If the thickness of the black absorbing layer 110 is increased to solve the problem of light crosstalk or light leakage, the problem that the thickness of the black absorbing layer 110 is too thick, the moire severity is increased, the transmittance of a collimating device is reduced, the actual process condition requirements cannot be met, and the use of an optical collimator is limited; meanwhile, due to the limitation of equipment, the area of the cross section of the optical collimator perpendicular to the axis of the core cannot be made too large, and when the optical collimator is damaged, the difficulty in detecting each core is large, so that the whole optical collimator is discarded, and the waste of resources is caused.

The inventor finds that the second black absorbing layer is adhered between the adjacent sensor units, so that the problems of light leakage and light crosstalk of the optical collimator can be well solved, the formed optical collimator has the problems of well preventing light leakage and light crosstalk, and the actual process requirements can be met. This is because the adhesion of the second black absorbing layer between adjacent sensor cells can not only absorb light at the edges of the sensor cells, but also prevent crosstalk into the adjacent sensor cells; the adjacent sensor units are convenient to bond, and no gap exists between the adjacent sensor units, so that the phenomenon of light leakage is avoided, the formed optical collimator meets the actual process requirement, and the service performance is improved; meanwhile, a plurality of sensors in the optical collimator are bonded together, so that the area of the cross section of the optical collimator perpendicular to the axis of the core material is not limited by equipment, when the optical collimator is damaged, only the damaged sensor unit is required to be discarded, the whole optical collimator is not required to be discarded, and resources are saved.

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

Fig. 5 is a top view of an optical collimator according to an embodiment of the present invention; fig. 6 is a perspective view of the optical collimator corresponding to fig. 5.

Referring first to fig. 5 and 6, an optical collimator 200 includes: a number of sensor cells 210, a second black absorbing layer 220.

In this embodiment, the second black absorption layer 220 is adhered between the adjacent sensor units 210, on one hand, due to the existence of the second black absorption layer 220, the second black absorption layer 220 has the characteristics of softness and easy fusion, so that the adjacent sensor units 210 can be well adhered together, and no gap or hole exists between the adjacent sensor units 210, so that a light leakage phenomenon occurs between the adjacent sensor units 210, and the formed optical collimator 200 is prevented from having a good performance of preventing light leakage; on the other hand, because the second black absorbing layer 220 is disposed between the adjacent sensor units 210, the second black absorbing layer 220 can absorb the light at the edge of the sensor unit 210, and can prevent the light from crosstalk into the adjacent sensor units 210, so that the formed optical collimator 200 has a good ability of preventing the light from crosstalk, the use performance of the optical collimator 200 is improved, the use range of the optical collimator 200 is expanded, and the actual process requirements can be met.

In this embodiment, the sensor units 210 are bonded together to form the optical collimator 200 that requires a certain cross-sectional area, so that the cross-sectional area of the formed optical collimator 200 is not limited by the process, instead of the conventional process of placing a plurality of core materials into the apparatus, placing a plurality of core materials according to the cross-sectional area of the apparatus, and then bonding the core materials together to form the optical collimator 200 that has a certain cross-sectional area, so that the cross-sectional area of the formed optical collimator 200 is not limited by the apparatus, and the use of the optical collimator is expanded.

In this embodiment, the optical collimator 200 includes a plurality of sensor units 210, and when the optical collimator 200 is damaged, the optical collimator 200 is detected, and the damaged sensor units 210 are discarded instead of the whole optical collimator 200, so that the cost and the resource are saved.

In this embodiment, the thickness of the second black absorbing layer 220 is between 5 and 20 μm; when the thickness of the second black absorbing layer 220 is less than 5 μm, because the thickness of the second black absorbing layer 220 is too thin, that is, the volume of the second black absorbing layer 220 is too small, there is not enough second black absorbing layer 220 to bond the adjacent sensor units 210, so that the bonding quality between the adjacent sensor units 210 is poor, and defects such as gaps or holes occur at the joints between the adjacent sensor units 210, which causes a problem of light leakage in the use process of the formed optical collimator 200; moreover, the volume of the second black absorbing layer 220 is too small to absorb light well, which causes a problem of light crosstalk between adjacent sensor units 210 and cannot meet actual process requirements; when the thickness of the second black absorbing layer 220 is greater than 20 μm, at this time, the second black absorbing layer 220 can ensure good adhesion quality between the adjacent sensor units 210, and can well absorb light at the edges of the sensor units 210, thereby preventing the problem of light crosstalk between the adjacent sensor units 210, but since the thickness of the second black absorbing layer 220 is too thick, the waste of resources is caused, and the cost of the formed optical collimator 200 is increased.

In this embodiment, the second black absorbing layer 220 is made of carbon fiber; in other embodiments, the material of the second black absorbing layer 220 may also be one or more of glass, organic material, or carbon fiber.

In this embodiment, the sensor unit 210 includes a plurality of core materials 211, and a first black absorption layer 212, and the first black absorption layer 212 is adhered between the adjacent core materials 211.

In this embodiment, the first black absorption layer 212 is adhered between the adjacent core materials 211 by fusing and pressing.

In other embodiments, the first black absorbing layer 212 is adhered between the adjacent core materials 211 by chemical deposition or melt-pressing or injection molding.

In this embodiment, the first black absorption layer 212 is adhered between the adjacent core materials 211 to facilitate mutual adhesion between the core materials 211, and ensure that no gap or hole exists between the core materials 211, thereby ensuring that no defect of light leakage exists in a single sensor unit 210; on the other hand, the phenomenon of light crosstalk between adjacent core materials 211 is prevented, and the first black absorption layer 212 can absorb light at the edge of the core materials 211, so as to prevent the light from entering the surrounding core materials 211, thereby avoiding the phenomenon of light crosstalk between the adjacent core materials 211 and ensuring that the phenomenon of light crosstalk does not occur inside each formed sensor unit 210.

In this embodiment, another reason why the second black absorbing layer 220 is adhered between the adjacent sensor units 210 is that the second black absorbing layer 220 and the first black absorbing layer 212 have similar properties, and the difference of the material properties is small, so that the second black absorbing layer 220 and the first black absorbing layer 212 can be well adhered together, thereby ensuring that the adjacent sensor units 210 can have good adhesion quality, and ensuring that no gap or hole exists when the adjacent sensor units 210 are adhered.

In this embodiment, the thickness of the first black absorption layer 212 is 1 to 3 micrometers, and when the thickness of the first black absorption layer 212 is less than 1 micrometer, there is not enough first black absorption layer 212 to bond the adjacent core materials 211 together, there may be gaps or holes between the adjacent core materials 211, and there is not enough thickness to absorb light irradiated to the edge of the core materials 211, so as to cause light crosstalk between the adjacent core materials 211; when the thickness of the first black absorbing layer 212 is greater than 3 μm, the thickness of the first black absorbing layer 212 is too thick, which causes resource waste of the first black absorbing layer 212 and increases the production cost.

In this embodiment, the first black absorbing layer 212 is made of glass; in other embodiments, the material of the second black absorbing layer 212 may also be carbon fiber, organic material, or the like.

In this embodiment, the core material 211 is a transparent cylinder structure and is made of glass; in other embodiments, the core material 211 may also be a transparent cylindrical structure, made of glass or plastic.

In this embodiment, the light rays that can be incident into the core material 211 have a minimum incident angle and a maximum incident angle, and the range between the maximum incident angle and the minimum incident angle is θ. When light rays within the theta range are irradiated, the light rays enter the core material 211, are collimated by the core material 211 and then enter other optical elements for processing; when light outside the range of θ is irradiated, the light is absorbed by the second black absorbing layer 212 (refer to fig. 7, which is a cross-sectional view of fig. 5 taken along line a-a, and the line with arrows represents the light), so that the light is collimated without causing crosstalk.

In the present embodiment, the sensor unit 210 has a prismatic structure, specifically, a hexagonal prismatic structure; in other embodiments, the sensor unit 210 may also be a pentagonal prism structure (refer to fig. 8).

Correspondingly the utility model discloses still provide the preparation optical collimator 200's process:

firstly, the core material 211 is provided, the core material 211 is a transparent cylinder structure, and the specific material is glass.

Several of the core materials 211 are stacked in a plurality of hexagonal prisms each of which is one of the sensor cells 210, and the first black absorption layer 212 is interposed between the core materials 211 within the hexagonal prisms.

The second black absorbing layer 220 is inserted at the edges of the adjacent hexagonal prisms.

The aligned sensor cells 210 and the second black absorbing layer 220 are heat-treated such that a plurality of the sensor cells 210 are bonded to each other.

In this embodiment, the process parameters of the thermal treatment include: the fusion pressing pressure is 0.3-0.8 MPa, the fusion pressing time is 2-12 hours, the fusion pressing temperature is 500-700 ℃, the annealing temperature is 400-800 ℃, and the annealing time is 24-72 hours.

In this embodiment, the shape of the inserted second black absorbing layer 220 is not limited, and the second black absorbing layer 220 having a desired shape is inserted according to actual needs.

In this embodiment, the second black absorption layer 220 is adhered between the adjacent sensor units 210, which facilitates adhesion between the adjacent sensor units 210, so that there is no gap or hole between the adjacent sensor units 210, and it is ensured that the formed optical collimator 200 does not have a light leakage defect during use; meanwhile, the second black absorption layer 220 is adhered to the adjacent sensor units 210, and the second black absorption layer 220 absorbs the redundant light between the adjacent sensor units 210, so that the problem of light crosstalk between the adjacent sensor units 210 is prevented, the service performance of the formed optical collimator 200 is ensured, the service range of the optical collimator 200 is expanded, and the actual test requirements can be better met.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention, and the scope of the present invention is defined by the appended claims.

Claims (9)

1. An optical collimator, comprising:

a plurality of sensor units, each of which is bonded to each other; the sensor unit includes: a plurality of core materials; a first black absorbing layer adhered between adjacent ones of the cores;

and a second black absorption layer adhered between adjacent sensor cells.

2. The optical collimator of claim 1, wherein the second black absorbing layer has a thickness of 5 to 20 μm.

3. The optical collimator of claim 1, wherein the material of the second black absorbing layer is one or more of glass, an organic material, or carbon fiber.

4. The optical collimator of claim 1, wherein the second black absorbing layer is adhered between adjacent ones of the sensor cells by a heat treatment.

5. The optical collimator of claim 4, wherein the process parameters of the thermal treatment include: the fusion pressing pressure is 0.3-0.8 MPa, the fusion pressing time is 2-12 hours, the fusion pressing temperature is 500-700 ℃, the annealing temperature is 400-800 ℃, and the annealing time is 24-72 hours.

6. The optical collimator of claim 1, wherein the first black absorbing layer has a thickness of 1 to 3 μm.

7. The optical collimator of claim 1, wherein the core is a transparent cylindrical structure made of glass or plastic.

8. The optical collimator of claim 1, wherein the first black absorbing layer is adhered between adjacent cores by melt pressing, injection molding or chemical deposition.

9. The optical collimator of claim 1, wherein the sensor unit is prism-shaped.

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