CN211603610U

CN211603610U - Optical fiber cone

Info

Publication number: CN211603610U
Application number: CN201922324129.9U
Authority: CN
Inventors: 骆志财; 李志祥; 吴逸文; 何相平
Original assignee: Guangzhou Honsun Opto-Electronic Co ltd
Current assignee: Guangzhou Honsun Opto-Electronic Co ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-09-29
Anticipated expiration: 2029-12-20

Abstract

The utility model discloses an optical fiber cone, the toper main part comprises a plurality of composite fiber permutation and combination, toper main part both ends face is convex sphere and plane respectively, the centre of sphere of convex sphere is located the axis at plane center, each composite fiber and toper main part both ends face are all perpendicular or each the contained angle of composite fiber and toper main part both ends face is not more than the threshold value of predetermineeing with the difference in right angle. The spherical center of the convex spherical surface is arranged on the axis passing through the center of the plane, so that the composite optical fibers are ensured to be relatively vertical to the convex spherical surface, the problem of aberration during spherical image acquisition is solved by enabling the composite optical fibers of the convex spherical surface to be radially directed to the spherical surface of the convex spherical surface, and the problems of distortion and poor image transmission quality in the process of image transmission of the optical fiber cone are effectively solved by enabling the composite optical fibers to be relatively vertical to the two end surfaces of the conical main body. The method can be widely applied to the technical field of optical fiber display.

Description

Optical fiber cone

Technical Field

The utility model relates to an optical fiber display technology field especially relates to an optical fiber cone.

Background

The optical fiber cone is an optical image transmission element processed based on an optical fiber panel, and is widely applied to the industrial, scientific research and medical fields of photosensitive elements (CCD), low-light-level imaging, television imaging, medical diagnosis and the like as a key Device due to the characteristics of amplification or reduction of transmitted images, zero image transmission distance and high coupling efficiency.

Two end faces of a conventional optical fiber taper are both planar structures as shown in fig. 3, generally, a large end plane 32 of the optical fiber taper is used as an image transmission end and is close to a planar image 31 for collection, and the collected planar image 31 is coupled with a photosensitive element 35 through a small end plane 34 of the optical fiber taper to realize collection and detection of the planar image 31. However, in the plane of the conventional optical fiber taper, the optical fiber direction at the central axis 33 of the plane is not perpendicular to the small end plane 34, except that the optical fiber direction at the central axis 33 of the plane is perpendicular to the small end plane 34, and the optical fiber direction at other positions of the small end plane 34 is not perpendicular to the small end plane 34, and forms a certain inclination angle 41 as shown in fig. 4 and 5. The contact area 51 between the inclined optical fiber and the small end face is larger than that between the vertical optical fiber and the small end face 34, and the contact area 51 between the inclined optical fiber and the small end face 34 is gradually larger from the center of the small end face to the edge of the small end face, thereby causing image transmission distortion, and meanwhile, the beveling of the optical fiber influences the numerical aperture of the optical fiber, thereby influencing image transmission quality, such as the optical fiber cone with two planar end faces.

When the spherical image 61 is collected, the spherical image 61 cannot be attached to the fiber taper plane, so that the problem of aberration from the edge to the center is shown in fig. 6; the existing improved technical scheme is that the large end plane of the optical fiber cone is directly processed into a spherical surface as shown in figure 7, the optical fiber direction of the two end surfaces of the improved optical fiber cone is not perpendicular to the two end surfaces, and the problems of image distortion and poor quality are not solved.

SUMMERY OF THE UTILITY MODEL

In order to solve one of the above technical problems, the present invention provides an optical fiber taper.

The utility model adopts the technical proposal that:

the optical fiber taper comprises a taper main body, wherein the taper main body is formed by arranging and combining a plurality of composite optical fibers, two end faces of the taper main body are respectively a convex spherical surface and a plane, the spherical center of the convex spherical surface is positioned on an axis passing through the center of the plane, two end faces of each composite optical fiber and the taper main body are perpendicular to each other, or the difference between the included angle and the right angle of each composite optical fiber and the two end faces of the taper main body is not more than a preset threshold value.

Further, the value range of the preset threshold is 0-5 °.

Furthermore, the composite optical fiber is formed by arranging and combining a plurality of single optical fibers, each single optical fiber comprises core glass and cladding glass, the refractive index of the core glass is greater than that of the cladding glass, and the core glass is wrapped by the cladding glass.

Furthermore, the number of the composite optical fibers on the two end faces of the conical main body is the same, and the diameters of the composite optical fibers of the convex spherical surfaces are larger than the diameter of the planar composite optical fiber.

Further, the optical fiber comprises a light absorption layer, and the light absorption layer is filled between the single optical fiber filaments.

Further, the cross section of the single optical fiber filament is circular or regular polygon.

The utility model has the advantages that: the spherical center of the convex spherical surface is arranged on the axis passing through the center of the plane, so that the composite optical fibers and the convex spherical surface are ensured to be relatively vertical, the problem of aberration during spherical image acquisition is solved, the two end surfaces of each composite optical fiber and the conical main body are perpendicular or the difference between the included angle and the right angle of each composite optical fiber and the two end surfaces of the conical main body is not greater than a preset threshold value, the composite optical fibers and the two end surfaces of the conical main body are ensured to be relatively vertical, the problems of distortion and poor image transmission quality in the process of image transmission of the optical fiber cone are effectively solved, and the optical fiber cone optical fiber.

Drawings

FIG. 1 is a block diagram of an optical fiber taper according to the present invention;

FIG. 2 is a schematic longitudinal sectional view of FIG. 1;

FIG. 3 is a schematic diagram of a conventional optical fiber taper configuration with planar end faces;

FIG. 4 is a schematic longitudinal sectional view of FIG. 3;

FIG. 5 is a schematic diagram of the contact area between the optical fiber and the small end face in the conventional optical fiber taper with two planar end faces;

FIG. 6 is a schematic diagram of a conventional fiber optic taper with two planar end faces for acquiring spherical images;

FIG. 7 is a schematic diagram of a modified conventional optical fiber taper with planar end faces;

FIG. 8 is a schematic diagram of a single fiber of the present invention with a round and a square configuration;

fig. 9 is a schematic diagram of a primary composite optical fiber filament formed by combining a plurality of single optical fibers arranged in a square shape and a plurality of single optical fibers arranged in a hexagonal shape according to an embodiment of the present invention.

Detailed Description

As shown in fig. 1, referring to fig. 1 and 2, an optical fiber taper comprises a tapered main body, the tapered main body is formed by arranging and combining a plurality of composite optical fibers 13, two end faces of the tapered main body are respectively a convex spherical surface 11 and a plane 12, a spherical center 15 of the convex spherical surface 11 is located on an axis 14 passing through the center of the plane 12, the two end faces of each composite optical fiber 13 and the tapered main body are perpendicular to each other, or a difference between an included angle 16 between each composite optical fiber 13 and the two end faces of the tapered main body and a right angle is not greater than a preset threshold value.

Specifically, the composite optical fiber 13 is used for transmitting an image collected by an optical fiber finger, two end faces of the tapered main body are provided with the convex spherical surface 11 and the plane 12, so that the conversion between a spherical image and a plane image can be realized during image collection of the optical fiber taper, the center 15 of the convex spherical surface 11 is arranged on the axis 14 passing through the center of the plane 12, so that the radial direction of the composite optical fiber 13 of the convex spherical surface 11 is both directed to the spherical surface of the convex spherical surface 11, the problem of aberration during spherical image collection is solved, and it is greatly ensured that each composite optical fiber 13 is relatively vertical to the convex spherical surface 12, so that the radial direction of the composite optical fiber 13 of the convex spherical surface 12 is both directed to the center 15 of the convex spherical surface, the problem of aberration during spherical image collection is solved, the convex spherical surface 11 and the plane 12 of each composite optical fiber 13 and the tapered main body of the optical fiber taper are both kept relatively vertical, so that the conversion of, the problems of aberration and unclear and incomplete image display in the optical fiber conical spherical surface image acquisition are effectively solved, and the problems of poor image transmission quality and image distortion caused by the inclination of the composite optical fiber and the optical fiber conical end surface are further solved; in this embodiment, the spherical surface of the convex spherical surface is preferably located at the center of the plane, and the shape of the tapered body is preferably conical.

Further, as a preferred embodiment, the preset threshold value ranges from 0 ° to 5 °.

In this embodiment, setting the value range of the preset threshold to 0 ° to 5 ° can ensure that the convex spherical surface and the plane of each composite optical fiber and the conical main body are kept relatively perpendicular, so as to effectively solve the problem of aberration in optical fiber conical spherical surface acquisition and realize the function of converting a spherical image into a planar image.

Further preferably, the composite fiber is formed by arranging and combining a plurality of single optical fibers, each single optical fiber comprises core glass and cladding glass, the refractive index of the core glass is greater than that of the cladding glass, and the core glass is wrapped by the cladding glass.

In the embodiment, the cladding glass, namely the low-refractive-index glass is wrapped on the periphery of the core glass, namely the high-refractive-index glass, so that the image can be independently transmitted in the single optical fiber according to the total reflection principle, the image is transmitted, and the incomplete image transmission information caused by the overflow of the image due to refraction is avoided.

In a further preferred embodiment, the number of the composite optical fibers on both end surfaces of the tapered body is the same, and the diameters of the composite optical fibers on the convex spherical surface are larger than the diameter of the composite optical fiber on the flat surface.

In this embodiment, the number of the composite optical fibers on the two end surfaces of the tapered optical fiber body is the same, the number of the composite optical fibers on the convex spherical surface and the number of the composite optical fibers on the flat surface are arranged in order and are in one-to-one correspondence, and the diameter of the composite optical fibers on the convex spherical surface is larger than that of the optical fibers on the flat surface, so that the image can be enlarged and reduced.

In a further preferred embodiment, the optical fiber further includes a light absorption layer filled between the single optical fibers.

In the embodiment, the stray light absorption material is added between each single optical fiber filament and each single optical fiber filament, which is beneficial to improving the image contrast of the optical fiber cone transmission image.

Further preferably, the single optical fiber filament has a circular or regular polygonal cross section.

In this embodiment, drawing the unit optical fiber into a circular or regular polygonal optical fiber facilitates the subsequent close-packing drawing of the optical fiber into a desired composite optical fiber.

The utility model discloses a concrete embodiment

The problem to distortion and aberration appear in traditional optic fibre awl sphere image biography, the utility model provides an optic fibre awl. As shown in fig. 1 and fig. 2, the optical fiber taper comprises a tapered body, two end faces of the tapered body are respectively a convex spherical surface 11 and a plane 12, the convex spherical surface 11 is located at the center 15 of the plane, two end faces of each composite optical fiber 13 and the tapered body are intersected, and the difference between the included angle 16 between the two end faces of each composite optical fiber 13 and the tapered body and the right angle is not more than 0-5 °.

The composite optical fiber 13 is formed by arranging and combining a plurality of circular single optical fiber filaments 9, the single optical fiber filaments 9 are formed by a combination of high-refractive-index glass serving as a single optical fiber core 91 and low-refractive-index glass serving as a single optical fiber cladding 92 as shown in fig. 8, the single optical fiber filaments can be circular or regular polygons including square, and details are not repeated herein; and the low refractive index glass is wrapped on the periphery of the high refractive index glass, so as to play a role in protecting the fiber core of the single fiber 9 high refractive index fiber and transmitting images, in this embodiment, the two end faces of each composite fiber 13 and the conical main body are intersected, and the included angle 16 between the two end faces of each composite fiber 13 and the conical main body can be 85 degrees to 90 degrees or 90 degrees to 95 degrees.

The number of the composite optical fibers on the two end faces of the conical main body is the same, and the diameters of the composite optical fibers of the convex spherical surfaces are larger than that of the planar composite optical fibers, so that the function of scaling the image according to the proportion when the optical fiber cone transmits the image is realized.

In order to increase the contrast of the image transmitted by the fiber cone, a light absorbing impurity layer is filled between each single fiber yarn 9 and the single fiber yarn 9.

In this embodiment 1, the composite optical fiber may be a structure in which a plurality of primary composite optical fibers are arranged in a hexagonal close-packed manner or a structure in which a plurality of primary composite optical fibers are arranged in a square close-packed manner, as shown in fig. 9, the composite optical fiber 13 is kept relatively perpendicular to the convex spherical surface 11 and the plane 12, so that the phenomena of distortion and aberration generated when an optical fiber cone transmits an image are effectively solved, and stray light absorbing glass is filled between a single optical fiber and a single optical fiber, which is helpful for improving the contrast of the transmitted image.

While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined by the appended claims.

Claims

1. The optical fiber taper is characterized by comprising a taper main body, wherein the taper main body is formed by arranging and combining a plurality of composite optical fibers, two end faces of the taper main body are respectively a convex spherical surface and a plane, the spherical center of the convex spherical surface is positioned on an axis passing through the center of the plane, the two end faces of each composite optical fiber and the taper main body are perpendicular, or the difference between the included angle and the right angle of each composite optical fiber and the two end faces of the taper main body is not more than a preset threshold value.

2. The optical fiber taper according to claim 1, wherein the predetermined threshold value is in a range of 0 ° to 5 °.

3. The optical fiber taper according to claim 1, wherein said composite optical fiber is composed of a plurality of single optical fibers arranged and combined, said single optical fibers comprise a core glass and a cladding glass, and the refractive index of the core glass is greater than that of the cladding glass, and said core glass is wrapped by the cladding glass.

4. The optical fiber taper according to claim 2, wherein the number of the composite optical fibers at both end faces of the taper body is the same, and the diameter of the composite optical fiber with the convex spherical surface is larger than that of the planar composite optical fiber.

5. The optical fiber taper according to claim 3, further comprising a light absorption layer filled between the single optical fibers.

6. The optical fiber taper according to claim 3, wherein said single optical fiber filament has a circular or regular polygonal cross-section.