CN114706159B - Multi-core optical fiber imaging device - Google Patents
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- CN114706159B CN114706159B CN202210245784.9A CN202210245784A CN114706159B CN 114706159 B CN114706159 B CN 114706159B CN 202210245784 A CN202210245784 A CN 202210245784A CN 114706159 B CN114706159 B CN 114706159B
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
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- G02B6/02042—Multicore optical fibres
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Abstract
The invention provides a multi-core fiber imaging device, which comprises a multi-core fiber array bundle, an imaging objective lens, an imaging tube lens and an imaging camera, wherein the multi-core fiber array bundle comprises a plurality of multi-core fibers, the multi-core fiber array bundle is provided with a multi-core fiber array input end and a multi-core fiber array output end, the multi-core fiber array output end of the multi-core fiber array bundle is connected with the imaging objective lens, the imaging tube lens and the imaging camera are sequentially connected, the multi-core fiber array input end of the multi-core fiber array bundle is provided with a conical chamfer part, the plurality of multi-core fibers are distributed in a hexagonal array, the multi-core fibers are provided with a central fiber core, the outer side of the central fiber core is provided with a peripheral fiber core along the circumferential direction, and the number of the peripheral fiber cores is six or integral multiple of six, so that the problem that the traditional fiber imaging technology cannot simultaneously meet the requirements of miniaturization and space imaging is solved.
Description
Technical Field
The invention relates to the technical field of photoelectric imaging, in particular to a multi-core optical fiber imaging device.
Background
The optical fiber has the advantages of low loss, low cost, electromagnetic interference resistance and the like, so that the optical fiber imaging technology not only continues the advantages of the optical fiber, but also has the advantages of integration, miniaturization and the like; the optical fiber imaging technology can be widely applied to the fields of biomedicine, laser technology and the like. In CN110989074A patent, the optical fiber imaging system collects images by using an optical fiber bundle composed of a plurality of single mode optical fibers, each single mode optical fiber is used for collecting images of a pixel point, and contains more single mode optical fibers, which results in a larger diameter of the optical fiber bundle, therefore, in CN113419307A patent, in order to improve the miniaturization degree of the optical fiber imaging system, the optical fiber bundle in the optical fiber imaging system is replaced by a single multimode optical fiber; therefore, the optical fiber imaging system in the prior art still includes a plurality of multimode optical fibers, and if the environment of the object to be imaged is a blood vessel, a bronchus, or the like, the multimode optical fibers in the optical fiber imaging system may not enter the environment of the object to be imaged, and the image of the object to be imaged cannot be acquired, so that the application range of the optical fiber imaging system is narrow. Patent CN111603133A proposes a visual flexible optical fiber surgical tool suitable for intravascular insertion, which uses an anderson local optical fiber, but the optical fiber is complex in preparation process, difficult to prepare, high in cost, and incapable of bending and detecting two side environments of a narrow environment.
In summary, the main fiber imaging technology at present cannot achieve miniaturization and imaging definition at the same time, and has the problems of high cost, difficult preparation and the like, so a multi-core fiber-based spatial imaging detection structure is needed, which can achieve illumination, integrates the fiber space visualization function without bending the multi-core fiber, and meets the requirements of miniaturization, low cost and the like.
Disclosure of Invention
The invention provides a multi-core optical fiber imaging device, which solves the problem that the traditional optical fiber imaging technology is difficult to simultaneously meet the requirements of miniaturization and space imaging.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a multi-core optical fiber imaging device comprises a multi-core optical fiber array beam, an imaging objective lens, an imaging tube lens and an imaging camera, wherein the multi-core optical fiber array beam comprises a plurality of multi-core optical fibers, the multi-core optical fiber array beam is provided with a multi-core optical fiber array input end and a multi-core optical fiber array output end, the multi-core optical fiber array output end of the multi-core optical fiber array beam is connected with the imaging objective lens, the imaging tube lens and the imaging camera are sequentially connected, the multi-core optical fiber array input end of the multi-core optical fiber array beam is provided with a conical chamfer part, the plurality of multi-core optical fibers are distributed in a hexagonal array, the multi-core optical fibers are provided with a central fiber core, the outer side of the central fiber core is provided with a peripheral fiber core along the circumferential direction, and the number of the fiber cores of the peripheral fiber cores is six or an integral multiple of six.
In a preferred scheme, a plurality of illuminating optical fibers are arranged in the multi-core optical fiber array bundle, each illuminating optical fiber comprises a plurality of outer ring illuminating optical fibers, a first gap illuminating optical fiber and a second gap illuminating optical fiber, the outer ring illuminating optical fibers are arranged at the outer edge of the multi-core optical fiber array bundle, the first gap illuminating optical fibers and the second gap illuminating optical fibers are arranged between the adjacent multi-core optical fibers, and the first gap illuminating optical fibers and the second gap illuminating optical fibers are alternately arranged on the outer sides of the multi-core optical fibers.
In a preferred scheme, the illumination device further comprises an illumination light source, one end of each outer ring illumination optical fiber forms a third illumination optical fiber bundle, the third illumination optical fiber bundle is connected with the illumination light source, one end of each first gap illumination optical fiber forms a first illumination optical fiber bundle, one end of each second gap illumination optical fiber forms a second illumination optical fiber bundle, the first illumination optical fiber bundle and the second illumination optical fiber bundle are used for imaging or illumination, the illumination device is further provided with an illumination time sequence controller, the first illumination optical fiber bundle and the second illumination optical fiber bundle are connected with the illumination light source or an imaging objective lens through the illumination time sequence controller, and the illumination time sequence controller is used for switching imaging or illumination states of the first illumination optical fiber bundle and the second illumination optical fiber bundle.
In a preferred scheme, the illumination time sequence controller comprises an outer shell, a rotatable light-transmitting device is arranged in the outer shell, a first light path and a second light path are further arranged in the light-transmitting device, the first light path is provided with an eccentric light inlet end and an eccentric light outlet end, the second light path is provided with an eccentric light inlet end and a central light outlet end, the outer shell is provided with a first eccentric light inlet hole, a second eccentric light inlet hole, a first eccentric light outlet hole, a central light outlet hole and a second eccentric light outlet hole, the illumination light source is provided with a first light source part and a second light source part, the end part of the first illumination optical fiber bundle is aligned with the first eccentric light inlet hole, the end part of the second illumination optical fiber bundle is aligned with the second eccentric light inlet hole, the first light source part is aligned with the second eccentric light outlet hole, the imaging objective lens is aligned with the central light outlet hole, and the light-transmitting device rotates to enable a connecting object at the two ends of the first light path and the second light path to change so as to switch the imaging or illumination state of the first illumination optical fiber bundle and the second illumination optical fiber bundle.
In a preferred embodiment, the first optical path and the second optical path are through holes or optical fiber structures or prism structures.
In a preferred embodiment, the first gap illumination fiber and the second gap illumination fiber are single-mode fibers, and the diameters of the cores of the first gap illumination fiber and the second gap illumination fiber are the same as the diameter of the core of the multicore fiber.
In a preferred scheme, the illumination light source is a normally-on light source.
In a preferred scheme, the number of the first gap illumination fibers or the second gap illumination fibers in the gaps between the three adjacent multi-core fibers is one or more.
In a preferred embodiment, the outer ring of the illumination fiber is a multi-core fiber or a single-mode fiber.
The invention has the beneficial effects that: the multi-core optical fiber has the advantages that the multi-core optical fiber shares structures such as cladding and the like, under the condition that the number of the cores is the same, the volume of the multi-core optical fiber is greatly reduced compared with that of a plurality of single-mode optical fibers, and therefore a multi-core optical fiber array beam formed by utilizing the multi-core optical fiber array has the characteristic of miniaturization; the input end of the multi-core fiber array beam is provided with a tangent plane, so that the side surface can be directly imaged without bending; the multi-core optical fibers are arranged in an array, the fiber cores are arranged in order, original images do not need to be calibrated, the demodulation difficulty is reduced, and the response is fast; the illumination optical fibers are arranged in the gaps between the adjacent multi-core optical fibers and are uniformly distributed, so that the imaging quality is improved, the illumination of the end face and the tangent plane of the input end of the multi-core optical fiber array beam can be met, and the condition of light blocking does not exist; the illumination optical fiber has an intermittent imaging function, can image the gap position between the multi-core optical fibers, and can also illuminate and image the switching frequency by adjusting the rotating speed of the light-transmitting device.
Drawings
The invention is further illustrated by the following examples in conjunction with the drawings.
Fig. 1 is a schematic diagram of the connection of the present invention.
FIG. 2 is a schematic view of a bundle section of the multi-core fiber array of the present invention.
FIG. 3 is a cross-sectional schematic view of a multi-core fiber array bundle of the present invention.
FIG. 4 is a schematic view of a gap illumination fiber according to the present invention.
FIG. 5 is a schematic diagram of a gap illumination fiber according to the present invention.
Fig. 6 is a schematic view of a multicore fiber interface slot of the present invention.
Fig. 7 is a schematic end view of an illumination timing controller according to the present invention.
Fig. 8 is a schematic diagram of a state of the illumination timing controller according to the present invention.
FIG. 9 is a diagram of a second state of the illumination timing controller according to the present invention.
In the figure: a multi-core fiber array bundle 1; a multicore fiber array input 101; a multicore fiber array output 102; a multi-core optical fiber 103; a chamfered portion 104; a central core 105; a peripheral core 106; an imaging objective lens 2; an imaging tube lens 3; an imaging camera 4; a first illumination fiber bundle 5; outer ring illumination fibers 501; a first gap illumination fiber 502; a second gap illumination fiber 503; an illumination light source 6; a first light source 601; a second light source 602; a second illumination fiber bundle 7; an illumination timing controller 8; a light transmitter 801; an outer shell 802; a first light path 803; a second optical path 804; a first eccentric light exit hole 805; a central light exit hole 806; a second eccentric light-emitting hole 807; a first eccentric light inlet 808; a second eccentric light inlet 809; and a third illumination fiber bundle 9.
Detailed Description
As shown in fig. 1 to 9, a multi-core fiber imaging device includes a multi-core fiber array bundle 1, an imaging objective lens 2, an imaging tube lens 3, and an imaging camera 4, where the multi-core fiber array bundle 1 includes a plurality of multi-core fibers 103, the multi-core fiber array bundle 1 has a multi-core fiber array input end 101 and a multi-core fiber array output end 102, the multi-core fiber array output end 102 of the multi-core fiber array bundle 1 is connected to the imaging objective lens 2, the imaging tube lens 3, and the imaging camera 4 are sequentially connected, the multi-core fiber array input end 101 of the multi-core fiber array bundle 1 is provided with a tapered chamfer portion 104, the plurality of multi-core fibers 103 are distributed in a hexagonal array, the multi-core fiber 103 has a central fiber core 105, a peripheral fiber core 106 is circumferentially arranged outside the central fiber core 105, and the number of the peripheral fiber cores 106 is an integral multiple of six or six.
N fiber cores of N multi-core fibers 103 on the end face of the multi-core fiber array beam 1 are defined as N x N pixels, N and N are integers larger than 1, structural glue is filled between the multi-core fibers 103 for fixation, and an optical signal is transmitted from one end of each fiber core to the other end, so that each fiber core is a minimum optical signal transmission unit, one fiber core corresponds to one pixel point, optical information obtained from an input end 101 of the multi-core fiber array is transmitted by the multi-core fiber array beam 1, is output by an output end 102 of the multi-core fiber array, sequentially passes through the imaging objective lens 2 and the imaging tube lens 3, is focused on a light sensing surface of the imaging camera 4, obtains pixels through ordered multi-core fiber information, and the pixels are arranged and combined according to the positions of the fiber cores and finally are reduced into a detected object image.
The multi-core fiber array input end 101 can be called a detection end which is a conical structure or a spherical structure ground to a certain angle, and space imaging can be realized without bending.
The multi-core fiber array output end 102 coincides with the imaging focal plane of the imaging objective lens 2, light output by the multi-core fiber array output end 102 is collimated and output after passing through the imaging objective lens 2 and is focused on the photosensitive surface of the imaging camera 4 after passing through the imaging tube lens 3, and the back focal plane of the imaging tube lens 3 coincides with the photosensitive surface of the imaging camera 4.
In a preferred scheme, a plurality of illumination fibers are arranged in the multi-core fiber array bundle 1, each illumination fiber comprises a plurality of outer ring illumination fibers 501, a first gap illumination fiber 502 and a second gap illumination fiber 503, the outer ring illumination fibers 501 are arranged at the outer edge of the multi-core fiber array bundle 1, the first gap illumination fibers 502 and the second gap illumination fibers 503 are arranged between the adjacent multi-core fibers 103, the first gap illumination fibers 502 and the second gap illumination fibers 503 are alternately arranged outside the multi-core fibers 103, and the three types of illumination fibers can be independently controlled and can adjust the local illumination intensity.
Traditional imaging structure, the fiber bundle is only the tip formation of image, the illumination optic fibre is generally attached in the fiber bundle outside, but this structure is because 1 tip corner cut of multicore fiber array bundle, illumination fiber tip can not surpass tangent plane 104, direct attached can lead to the light part of tip to be blocked in the outside, positive front end light is dark partially, consequently with illumination fiber integration in multicore fiber array bundle 1, illumination when outer lane illumination optic fibre 501 and the main side imaging of being responsible for, the gap illumination optic fibre is especially in the gap illumination optic fibre of inner circle, light filling when mainly used terminal surface illumination, improve the image quality.
The luminance of illumination optic fibre is usually through the luminance unified control of adjustment light emitting source, when shooting the non-target object around the object reflection of light degree to the target, it thinks to be difficult to obtain better shooting, especially under the condition that the side also needs the formation of image, if still unify luminance, the formation of image effect is difficult to guarantee, consequently, adopt the structure that outer lane illumination optic fibre and clearance illumination optic fibre combined together, be convenient for independently adjust luminance, clearance illumination optic fibre is for using the multiple spot distributed illumination, the shade can not appear during the formation of image, clearance illumination optic fibre also divide into two kinds in addition, the irradiation mode is abundanter, can finely tune illumination angle and intensity.
In a preferred scheme, the illumination device further comprises an illumination light source 6, one end of the outer ring illumination optical fibers 501 forms a third illumination optical fiber bundle 9, the third illumination optical fiber bundle 9 is connected with the illumination light source 6, one end of the first gap illumination optical fibers 502 forms a first illumination optical fiber bundle 5, one end of the second gap illumination optical fibers 503 forms a second illumination optical fiber bundle 7, the first illumination optical fiber bundle 5 and the second illumination optical fiber bundle 7 are used for imaging or illumination, an illumination timing controller 8 is further provided, the first illumination optical fiber bundle 5 and the second illumination optical fiber bundle 7 are connected with the illumination light source 6 or the imaging objective lens 2 through the illumination timing controller 8, the illumination timing controller 8 can switch the communication state, and the illumination timing controller 8 is used for switching the imaging or illumination state of the first illumination optical fiber bundle 5 and the second illumination optical fiber bundle 7.
The multi-core fibers 103 in the multi-core fiber array bundle 1 are tightly attached to each other, and no imaging fiber core is arranged at the crack position, so that the pixel at the position corresponding to the shooting position is in a lost state, and because the multi-core fibers 103 in the multi-core fiber array bundle 1 are numerous, especially when the multi-core fibers 103 themselves contain more fiber cores and have larger diameters, the cracks are correspondingly larger, so that the imaging at the position is in a blank state, and the quality of the whole image is influenced. Therefore, by using the first gap illumination optical fiber 502 and the second gap illumination optical fiber 503, when the first gap illumination optical fiber 502 is illuminated, the second gap illumination optical fiber 503 is in an imaging state and is recorded as a state a, when the first gap illumination optical fiber 502 is imaged, the second gap illumination optical fiber 503 is in an illumination state and is recorded as a state B, the outer ring illumination optical fiber 501 is in a normally bright state, because a group of gap illumination optical fibers are always illuminated at the same time, the overall and local brightness is not greatly influenced, when a picture is taken, two pictures of the state a and the state B are taken at the same position, blank positions are complemented with each other, and a complete picture is synthesized; during detection, because continuous images need to be shot, the illumination time sequence controller 8 is used for controlling the state A and the state B to be alternately switched, blank positions are mutually complemented, other positions are mutually overlapped, and the switching frequency is better to exceed 20Hz so as to prevent human eyes from perceiving flash activity and restoring activity to generate fatigue.
In a preferred embodiment, the illumination timing controller 8 includes an outer housing 802, a rotatable light transmitter 801 is disposed in the outer housing 802, a first light path 803 and a second light path 804 are further disposed in the light transmitter 801, the first light path 803 has an eccentric light input end and an eccentric light output end, the second light path 804 has an eccentric light input end and a central light output end, the outer housing 802 has a first eccentric light input hole 808, and the second eccentric light input whispering is a first eccentric light output hole 805, a central light output hole 806, and a second eccentric light output hole 807, the illumination light source 6 has a first light source portion 601 and a second light source portion 602, the end of the first illumination fiber bundle 5 is aligned with the first eccentric light input hole 808, the end of the second illumination fiber bundle 7 is aligned with the second eccentric light input hole 809, the first light source portion 601 is aligned with the second eccentric light output hole 807, the second light source portion 602 is aligned with the first eccentric light output hole 805, the imaging objective lens 2 is aligned with the central light output hole 806, and the light transmitter 801 rotates to make the connection objects at the two ends of the first light path 803 and the second light path 804 change the illumination state of the illumination fiber bundle 5 or the imaging fiber bundle 7.
In state a, the first gap illumination fiber 502 is connected to the light source 6 through the first light path 803, and the second gap illumination fiber 503 is connected to the imaging camera 4 through the second light path 804; in state B, the light transmitter 801 is rotated through 180 °, the first gap illumination fiber 502 is connected to the imaging camera 4 via the second light path 804, and the second gap illumination fiber 503 is connected to the light source 6 via the first light path 803.
A multi-core fiber array bundle 1; a multi-core fiber array input 101; a multi-core fiber array output 102; a multi-core optical fiber 103; a chamfered portion 104; a central core 105; a peripheral core 106; an imaging objective lens 2; an imaging tube lens 3; an imaging camera 4; a first illumination fiber bundle 5; outer ring illumination fibers 501; a first gap illumination fiber 502; a second gap illumination fiber 503; an illumination light source 6; a first light source 601; a second light source 602; a second illumination fiber bundle 7; an illumination timing controller 8; a light transmitter 801; an outer shell 802; a first light path 803; a second light path 804; a first eccentric light exit hole 805; a central light exit hole 806; a second eccentric light-emitting hole 807; a first eccentric light inlet 808; a second eccentric light inlet 809; and a third illumination fiber bundle 9.
The rotation of the light tunnel 801 may be achieved by an external drive mechanism.
In a preferred embodiment, the first light path 803 and the second light path 804 are through holes or optical fiber structures or prism structures.
Taking the state in fig. 9 as an example, if the first optical path 803 and the second optical path 804 adopt a through hole structure, the first illumination fiber bundle 5 is directly aligned to the first light source portion 601 through the through hole without being blocked after being combined, the second optical path 804 is set as an oblique through hole, and the second gap illumination fiber 503 is aligned to the center of the imaging objective lens 2 through the oblique through hole; the optical fiber structure is a plurality of multi-core or single-mode optical fibers, the total number of the fiber cores is equal to that of the first illumination optical fiber bundle 5 or the second illumination optical fiber bundle 7, and if the first light path 803 and the second light path 804 adopt the optical fiber structure, the end parts are directly connected without considering the incident angle; the first light path 803 and the second light path 804 may also adopt a prism structure, i.e. a plurality of matched mirror groups arranged at proper angles, and light is transmitted from one end to the other end by reflection.
In a preferred embodiment, the first gap illumination fiber 502 and the second gap illumination fiber 503 are single-mode fibers, which are easily adjusted to match the positions of the rows and columns of the cores in the multi-core fiber 103, the diameters of the cores of the first gap illumination fiber 502 and the second gap illumination fiber 503 are the same as the diameter of the core of the multi-core fiber 103, and the sizes of the pixels of the cores of the gap illumination fiber and the core of the multi-core fiber 103 are the same during imaging.
In the preferred scheme, the illumination light source 6 is a normally bright light source, such as an LED light source, so as to avoid the scintillation period of the illumination light source 6 from increasing the difficulty of the imaging algorithm.
In a preferred embodiment, the number of the first gap illumination fibers 502 or the second gap illumination fibers 503 in the gap between three adjacent multi-core fibers 103 is one or more as shown in fig. 6, which is determined according to the specific size of the crack gap.
In a preferred embodiment, the outer illumination fibers 501 are multi-core fibers or single-mode fibers, and the number of the outer illumination fibers is determined according to the size of the space.
The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention is defined by the claims, and includes equivalents of technical features described in the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of this invention.
Claims (8)
1. A multi-core optical fiber imaging device is characterized in that: the imaging optical fiber array bundle comprises a multi-core optical fiber array bundle (1), an imaging objective lens (2), an imaging tube lens (3) and an imaging camera (4), wherein the multi-core optical fiber array bundle (1) comprises a plurality of multi-core optical fibers (103), the multi-core optical fiber array bundle (1) is provided with a multi-core optical fiber array input end (101) and a multi-core optical fiber array output end (102), the multi-core optical fiber array output end (102) of the multi-core optical fiber array bundle (1) is connected with the imaging objective lens (2), the imaging tube lens (3) and the imaging camera (4) are sequentially connected, the multi-core optical fiber array input end (101) of the multi-core optical fiber array bundle (1) is provided with a conical chamfered part (104), the plurality of multi-core optical fibers (103) are distributed in a hexagonal array, the multi-core optical fiber (103) is provided with a central fiber core (105), the outer side of the central fiber core (105) is provided with a peripheral fiber core (106) along the circumferential direction, and the number of the peripheral fiber cores (106) is an integral multiple of six or six;
a plurality of illuminating optical fibers are arranged in the multi-core optical fiber array bundle (1), each illuminating optical fiber comprises a plurality of outer ring illuminating optical fibers (501), a first gap illuminating optical fiber (502) and a second gap illuminating optical fiber (503), the outer ring illuminating optical fibers (501) are arranged on the outer edge of the multi-core optical fiber array bundle (1), the first gap illuminating optical fibers (502) and the second gap illuminating optical fibers (503) are arranged between the adjacent multi-core optical fibers (103), and the first gap illuminating optical fibers (502) and the second gap illuminating optical fibers (503) are alternately arranged on the outer sides of the multi-core optical fibers (103).
2. The multi-core optical fiber imaging apparatus as claimed in claim 1, wherein: the illumination device is characterized by further comprising an illumination light source (6), a third illumination optical fiber bundle (9) is formed by one end of a plurality of outer ring illumination optical fibers (501), the third illumination optical fiber bundle (9) is connected with the illumination light source (6), a first illumination optical fiber bundle (5) is formed by one end of a plurality of first gap illumination optical fibers (502), a second illumination optical fiber bundle (7) is formed by one end of a plurality of second gap illumination optical fibers (503), the first illumination optical fiber bundle (5) and the second illumination optical fiber bundle (7) are used for imaging or illumination, an illumination time sequence controller (8) is further arranged, the first illumination optical fiber bundle (5) and the second illumination optical fiber bundle (7) are connected with the illumination light source (6) or the imaging objective lens (2) through the illumination time sequence controller (8), and the illumination time sequence controller (8) is used for switching imaging or illumination states of the first illumination optical fiber bundle (5) and the second illumination optical fiber bundle (7).
3. The multi-core optical fiber imaging apparatus as claimed in claim 2, wherein: the illumination time sequence controller (8) comprises an outer shell (802), a rotatable light-passing device (801) is arranged in the outer shell (802), a first light path (803) and a second light path (804) are further arranged in the light-passing device (801), the first light path (803) is provided with an eccentric light inlet end and an eccentric light outlet end, the second light path (804) is provided with an eccentric light inlet end and a central light outlet end, the outer shell (802) is provided with a first eccentric light inlet hole (808), a second eccentric light inlet hole (809), a first eccentric light outlet hole (805), a central light outlet hole (806) and a second eccentric light outlet hole (807), an illumination light source (6) is provided with a first light source part (601) and a second light source part (602), the end of a first illumination optical fiber bundle (5) is aligned with the first eccentric light inlet hole (808), the end of a second illumination optical fiber bundle (7) is aligned with the second eccentric light inlet hole (809), the first light source part (601) is aligned with the second eccentric light outlet hole (807), the second light source part (602) is aligned with the first eccentric light outlet hole (805), and the end of the second illumination optical fiber bundle (7) is aligned with the second imaging optical path (803) or the imaging optical fiber bundle (803) to change the imaging state of the illumination object (801).
4. The multi-core optical fiber imaging apparatus as claimed in claim 3, wherein: the first light path (803) and the second light path (804) are through holes or optical fiber structures or prism structures.
5. The multi-core optical fiber imaging apparatus as claimed in claim 2, wherein: the first gap illumination fiber (502) and the second gap illumination fiber (503) are single-mode fibers, and the core diameters of the first gap illumination fiber (502) and the second gap illumination fiber (503) are the same as the core diameter of the multi-core fiber (103).
6. The multi-core optical fiber imaging apparatus as claimed in claim 2, wherein: the illumination light source (6) is a normally bright light source.
7. The multi-core optical fiber imaging apparatus as claimed in claim 1, wherein: the number of the first gap illumination fibers (502) or the second gap illumination fibers (503) in the gap between three adjacent multi-core fibers (103) is one or more.
8. The multi-core fiber imaging apparatus of claim 1, wherein: the outer ring illumination optical fiber (501) is a multi-core optical fiber or a single-mode optical fiber.
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| EP3654824A4 (en) * | 2017-07-17 | 2021-04-21 | Z Square Ltd. | Enhancing imaging by multicore fiber endoscopes |
| CN207768341U (en) * | 2017-08-28 | 2018-08-28 | 聂玉奎 | A kind of separable fibrescope |
| CN109946271A (en) * | 2019-02-25 | 2019-06-28 | 桂林电子科技大学 | A kind of multi-core optical fiber cell sensor with non-equilateral pyramid optical fiber end structure |
| JP6917414B2 (en) * | 2019-07-19 | 2021-08-11 | 株式会社フジクラ | Image fibers, endoscopes with image fibers, and endoscope systems with endoscopes |
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