CN211560027U - OCT (optical coherence tomography) confocal common-path dual-mode endoscopic probe - Google Patents
OCT (optical coherence tomography) confocal common-path dual-mode endoscopic probe Download PDFInfo
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Abstract
The utility model discloses an OCT confocal common-path dual-mode endoscopic probe, the common-path light splitting module separates a confocal light path from an OCT light path, the confocal light path is overlapped with the OCT light path through the common-path light splitting module after being changed by the confocal light path module, common-path output is realized by sharing a part of optical lenses, the size requirement on the lenses is reduced, and the probe is miniaturized without the need of moving image correction; the common-path structure is adopted, so that the endoscopic probe is small in size and simple to process, the probe is convenient to share with the imaging channel of the existing endoscope, and multi-mode imaging is realized; based on confocal imaging and OCT imaging characteristics, a common-path scanning probe is designed, and due to the structural characteristics of the common-path scanning probe, the common-path scanning probe is not easily interfered in the same environment, the stability of the system is obviously enhanced, real-time imaging can be realized, and a correction algorithm is not needed; the technical scheme is not only suitable for detecting and imaging biological tissues and measuring an optical-mechanical-electrical system in industry, but also suitable for imaging objects with other micro structures.
Description
Technical Field
The utility model relates to an endoscope especially relates to an OCT copolymerization is focused and is looked probe in way bimodulus altogether.
Background
In the field of endoscopic medical diagnosis, since a lesion site often occurs on a superficial tissue surface, a doctor needs to observe not only an image of a biological tissue surface but also the structure and morphology of the interior of the tissue to find a minute lesion therefrom. For the existing tomography technology, such as ultrasonic imaging, the resolution is low while the imaging depth is deep, and the requirement of finding tiny lesions is not met.
At present, a confocal system has the advantages of clear imaging, continuous slice scanning and image recombination, a multi-marking technology, living body observation, acquisition of quantitative information and the like, has high imaging contrast and resolution, and is widely applied to various medical fields. On the basis, the optical fiber confocal endoscopic microscopy system is rapidly developed. The optical fiber generates a flexible connection form between the objective lens of the confocal microscope and other systems, so that the system probe can enter the tissue to realize in-vivo confocal imaging. The confocal micro-probe imager (CellVizio 100 Series) developed by the french MKT company is the most widely popularized confocal endoscopic equipment at present, and adopts an ultrafine image transmission optical fiber as a probe, enters a human body through an endoscope working channel in a sub-mirror mode, and approaches a tissue to be detected for microscopic imaging.
The Endoscopic OCT (Endoscopic optical coherence tomography) is an OCT branch technology that has emerged and vigorously developed in recent ten years along with the development of OCT technology, and its core objective is to miniaturize an OCT optical imaging device without reducing the resolution and provide a high-resolution OCT image of the internal organ lumen of a human body. The technology greatly expands the application field of the OCT technology, so that an OCT examination object develops from a body surface organ or a biopsy sample to internal organs of a human body, such as blood vessels, a digestive tract, a respiratory tract and the like, and various digestive tract lumens, large digestive tract lumens (such as esophagus and rectum), small digestive tract lumens (such as biliary tract) and the like are involved at present. In clinical terms, the OCT endoscope technology has been primarily used for examining atherosclerosis and for examining the placement of vascular stents. The OCT microprobe is used as a key component in an endoscopic OCT system, can be combined with the existing endoscope or minimally invasive technology clinically used, extends into internal organs of a human body, and collects back scattering signals from biological tissues; meanwhile, the characteristics of small physical size, high mechanical strength and the like are also met.
These two imaging modalities, used alone, have drawbacks: OCT cannot provide images of cell-level fineness, and accurate stage diagnosis cannot be made by simply relying on OCT; the confocal system cannot provide depth information, cannot identify the depth of a lesion, and cannot observe changes in the tissue level. Specifically, for cancer diagnosis, the use of confocal imaging allows identification of cell morphology and thus the stage of a particular cancer, and OCT allows identification of the depth of cancer cell infiltration and thus the decision on the surgical plan. Therefore, the OCT and confocal dual-mode endoscope is a development direction at present. Because the requirements of confocal and OCT on the optical performance of the lens are different, the existing dual-mode endoscope only simply concentrates an OCT lens and a confocal lens in the same endoscope, which brings larger probe size and generates deformation when the OCT image and the confocal image are superposed together due to the error brought by the motion of the probe when the OCT lens and the confocal lens are fused.
Accordingly, the prior art is yet to be improved and developed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an endoscopic probe of path bimodulus is altogether focused to OCT aims at solving current bimodulus endoscope probe size big, and the probe motion brings the error and leads to OCT image and the problem that produces the deformation when focusing image stack together.
The technical scheme of the utility model as follows: an OCT confocal common-path dual-mode endoscopic probe, comprising:
the optical fiber module is used for connecting an optical path to realize bidirectional transmission of light;
the beam shaping module is used for expanding and shaping the OCT light and the confocal light projected from the optical fiber module;
the common-path light splitting module selectively transmits or reflects OCT light and confocal light by utilizing a dichroic film, and the module is also a part of the optical path of the OCT light and the confocal light;
the confocal optical path module only transmits confocal light, so that the confocal light obtains characteristics of focal length, aberration and numerical aperture completely different from OCT light;
the optical fiber module, the beam shaping module, the common-path light splitting module and the confocal light path module are all arranged in the probe shell.
The OCT confocal common-path dual-mode endoscopic probe comprises an optical fiber module, a beam shaping module, a common-path light splitting module and a confocal optical path module, wherein the optical fiber module comprises an optical fiber component, and the common-path light splitting module comprises a second lens; the upper end and the lower end of the front surface of the first lens are respectively plated with a first reflecting film, the middle part of the front surface of the first lens is plated with an antireflection film, the antireflection film is positioned between the first reflecting film at the upper end and the first reflecting film at the lower end, the light beam shaping module adopts the part of the first lens plated with the antireflection film, and the confocal light path module adopts the part of the first reflecting film of the first lens; the optical fiber assembly, the first lens and the second lens are all arranged in the probe shell; the middle part of the front surface of the second lens is plated with a dichroic coating which selectively transmits OCT light and totally reflects confocal light.
The OCT confocal common-path dual-mode endoscopic probe comprises an optical fiber assembly, a first reflection film, an anti-reflection film and a second reflection film, wherein the diameter of the anti-reflection film is matched with the diameter and the emergent angle of the optical fiber assembly, and all light emitted by the optical fiber assembly is not contacted with the first reflection film due to the diameter of the matched transparent film.
The OCT confocal common-path dual-mode endoscopic probe comprises a first lens, a second lens and a third lens, wherein the first lens is provided with a first reflecting film, and the second reflecting film is provided with a curvature radius which enables confocal light to obtain a focal length, an aberration and a numerical aperture completely different from OCT light.
The OCT confocal common-path dual-mode endoscopic probe comprises a first reflecting film, a second reflecting film and a third reflecting film, wherein the first reflecting film is a gold film, a silver film, an aluminum film or a dielectric film.
The OCT confocal common-path dual-mode endoscopic probe comprises an optical fiber module, a beam shaping module, a common-path light splitting module and a confocal optical path module, wherein the optical fiber module comprises an optical fiber component for projecting confocal light and OCT light, the beam shaping module comprises a self-focusing lens for collimating or converging the OCT light and the confocal light at a small angle, the common-path light splitting module comprises a right-angle triangular prism, a dichroic coating film which selectively penetrates through the OCT light and totally reflects the confocal light is plated on the inclined surface of the prism of the right-angle triangular prism, and the confocal optical path module comprises a dove prism with two curved surfaces.
The OCT confocal common-path dual-mode endoscopic probe further comprises a convergence module which converges and projects light transmitted by the common-path light splitting module onto a measured object, and the convergence module is arranged in a probe shell.
The OCT confocal common-path dual-mode endoscopic probe comprises a probe shell, wherein a projection structure used for separating a beam shaping module, a common-path light splitting module and a convergence module is arranged in the probe shell.
The OCT confocal common-path dual-mode endoscopic probe comprises a probe shell, wherein the inner wall of the probe shell is coated with black and is subjected to sand blasting to absorb scattered light, and the front end of the probe shell is transparent.
The OCT confocal common-path dual-mode endoscopic probe comprises an optical fiber module and a probe body, wherein the optical fiber module adopts an optical fiber bundle.
The utility model has the advantages that: the utility model provides an OCT copolymerization is burnt and is looked into probe in way bimodulus altogether, common way beam split module is with the separation of copolymerization light path and OCT light path, the copolymerization light path is through the overlapping together of common way beam split module and OCT light path after the copolymerization light path module changes, realizes sharing way output through sharing a part of optical lens, reduces the lens size requirement, the probe miniaturization need not to carry out the motion image correction simultaneously; the common-path structure is adopted, so that the endoscopic probe is small in size and simple to process, the probe is convenient to share with the imaging channel of the existing endoscope, and multi-mode imaging is realized; based on confocal imaging and OCT imaging characteristics, a common-path scanning probe is designed, and due to the structural characteristics of the common-path scanning probe, the common-path scanning probe is not easily interfered in the same environment, the stability of the system is obviously enhanced, real-time imaging can be realized, and a correction algorithm is not needed; the technical scheme is not only suitable for detecting and imaging biological tissues and measuring an optical-mechanical-electrical system in industry, but also suitable for imaging objects with other micro structures.
Drawings
Fig. 1 is a schematic structural diagram of an OCT confocal common-path dual-mode endoscopic probe according to an embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of an OCT confocal common-path dual-mode endoscopic probe according to embodiment 2 of the present invention.
Fig. 3 is a flowchart of the imaging method of the OCT confocal common-path dual-mode endoscopic probe of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
As shown in fig. 1, an OCT confocal dual-mode endoscopic probe relates to OCT and confocal, and the optical paths of the OCT and confocal dual-mode endoscopic probe can be output in a common path, and includes:
the optical fiber module is used for connecting an optical path to realize bidirectional transmission of light;
the beam shaping module is used for expanding and shaping the OCT light and the confocal light projected from the optical fiber module;
the common-path light splitting module selectively transmits or reflects OCT light and confocal light by utilizing a dichroic film, and the module is also a part of the optical path of the OCT light and the confocal light;
the confocal optical path module only transmits confocal light, so that the confocal light obtains characteristics of focal length, aberration and numerical aperture completely different from OCT light;
the convergence module converges and projects the light transmitted by the common-path light splitting module onto a measuring object;
the optical fiber module, the beam shaping module, the common-path light splitting module, the confocal light path module and the convergence module are all arranged in the probe shell; the OCT light path and the confocal light path are integrated through the common path light splitting module, then the confocal light path and the OCT light path are overlapped together, and the light is converged and emitted through the converging module, so that the numerical aperture difference of the OCT light and the confocal light is formed.
The convergence module converges the OCT light and the confocal light 7 emitted from the common-path light splitting module onto the optical axis thereof to realize common-path output, but the convergence module is not necessary in the OCT confocal common-path dual-mode endoscopic probe, that is, the convergence module may not be provided in the OCT confocal common-path dual-mode endoscopic probe.
According to the OCT confocal common-path dual-mode endoscopic probe, the confocal optical path and the OCT optical path are overlapped, common-path output is realized by sharing a part of optical lenses, the requirement on the size of the lenses is reduced, and the probe is miniaturized without moving image correction.
The OCT confocal common-channel dual-mode endoscopic probe described above is described by referring to the following examples:
example 1
As shown in fig. 1, the OCT confocal common-path dual-mode endoscopic probe includes an optical fiber module, a beam shaping module, a common-path light splitting module, a confocal optical path module, and a converging module, where the optical fiber module includes an optical fiber assembly 11, the common-path light splitting module includes a second lens 16, and the converging module includes a third lens 17; the upper end and the lower end of the front surface of the first lens 14 (the front surface of the first lens 14 is the surface of the first lens 14 close to the optical fiber assembly 11) are plated with first reflection films 12, the middle part of the front surface of the first lens 14 is plated with an antireflection film, the antireflection film is positioned between the first reflection film 12 at the upper end and the first reflection film 12 at the lower end, the light beam shaping module adopts the part of the first lens 14 plated with the antireflection film, and the confocal optical path module adopts the part of the first reflection film 12 of the first lens 14; the optical fiber assembly 11, the first lens 14, the second lens 16 and the third lens 17 are all arranged in the probe shell 115; a dichroic coating 15 which selectively transmits OCT light and totally reflects confocal light is coated in the middle of the front surface of the second lens 16 (the front surface of the second lens 16 is the surface of the second lens 16 close to the first lens 14); the third lens 17 converges the OCT light and the confocal light 7 emitted from the second lens 16 on the optical axis thereof, thereby realizing a common output.
In some embodiments, the optical fiber assembly 11 is fixed at the center of the probe housing 115, and the optical fiber assembly 11 and the probe housing 115 are fixed by dispensing.
In some embodiments, the first lens 14, the second lens 16, and the third lens 17 are fixed in the probe housing 115 by means of glue dispensing.
In some embodiments, the optical fiber assembly 11 employs a fiber bundle comprising thousands to tens of thousands of optical fibers, and the light of the OCT light path and the confocal light path is projected from the fiber bundle of the fiber bundle 11.
In some embodiments, the optical fiber assembly 111 may also employ double-clad optical fibers.
In some embodiments, the first reflective film 12 is typically a gold film or a silver film, and may also be an aluminum film or a dielectric film.
In some embodiments, the curvature radius of the first lens 14 coated with the first reflective film 12 is specially designed to obtain a focal length, aberration, and numerical aperture characteristics of the confocal light that are completely different from those of the OCT light.
In some embodiments, the diameter of the antireflection film depends on the diameter of the optical fiber assembly 11 and the exit angle, so that all the light exiting from the optical fiber assembly 11 does not contact the first reflection film 12.
In some embodiments, a protruding structure is provided inside the probe housing 115 for separating the first lens 14, the second lens 16, and the third lens 17; the inner wall of the probe housing 115 is blackened and sandblasted to absorb scattered light, and the front end of the probe housing 115 is made transparent so that light can pass through with as little loss as possible.
In fig. 1, the continuous straight line is the OCT optical path, and the broken line is the confocal optical path. Due to the existence of the dichroic coating 15, the confocal light path and the OCT light path are completely different, so that the confocal light path with high numerical aperture and the OCT light path with low numerical aperture are simultaneously realized in the same lens group, and the two are overlapped.
In this embodiment, the imaging process of the OCT confocal common-path dual-mode endoscopic probe is as follows: firstly, a laser scanner couples OCT light into the optical fiber of the optical fiber assembly 11, the OCT light respectively passes through the central parts of the first lens 14, the second lens 16 and the third lens 17 to form a low-numerical-aperture convergent light beam to be emitted, and the distance from the focal point of the OCT light to the third lens 17 is just 2 times of the distance from the focal point of the confocal light to the third lens 17; when the OCT light projection is completed, the laser scanner couples the confocal light into the optical fiber of the optical fiber assembly 11, and the confocal light passes through the center of the first lens 14, is reflected in front of the second lens 16 to the front of the first lens 14, then passes through the second lens 16, and finally is converged out through the third lens 17. Obviously, since the aperture of the confocal light is much larger than that of the OCT light, the structure can make the light with two different wavelengths have a larger numerical aperture difference. By the method, the OCT images and the confocal images at the same position are accurately overlapped, and the images are easily overlapped and fused through an algorithm.
Example 2
As shown in FIG. 2, the OCT confocal common-path dual-mode endoscopic probe comprises an optical fiber module, a beam shaping module, a common-path light splitting module, a confocal optical path module and a convergence module, the fiber module comprises a fiber bundle 18 for projecting confocal light and OCT light, the beam shaping module comprises a self-focusing lens 111 for collimating or converging the OCT light and the confocal light at a small angle, the common path splitting module comprises a right-angle triangular prism 112, the prism slant of the right-angle triangular prism 112 is coated with a dichroic coating film that selectively transmits the OCT light and totally reflects the confocal light, the confocal optical path module comprises a dove prism 113 with two curved surfaces, the converging module comprises a fourth lens 114, and the fourth lens 114 finally converges the OCT light and the confocal light 7 emitted from the right-angle triangular prism 112 on the optical axis thereof and eliminates chromatic aberration, thereby realizing common-path output.
In some embodiments, the fiber optic bundle 18 is secured within the probe housing 116 by glue dispensing.
In some embodiments, a protrusion structure is provided inside the probe housing 116 to separate the beam shaping module, the common path splitting module, and the converging module; the inner wall of the probe housing 116 is blackened and sandblasted to absorb scattered light, and the front end of the probe housing 116 is made transparent so that light can pass through with as little loss as possible.
In fig. 2, the continuous straight line is the OCT optical path, and the broken line is the confocal optical path.
In this embodiment, the imaging process of the OCT confocal common-path dual-mode endoscopic probe is as follows: the laser scanner transmits OCT light to the optical fiber bundle 18 through the optical fiber module, the OCT light forms a parallel or small-angle convergent light beam through the self-focusing lens 111, the parallel or small-angle convergent light beam is projected onto the inclined plane of the right-angle triangular prism 112, then is reflected to the fourth lens 114 by the inclined plane of the right-angle triangular prism 112, and then is converged into low-numerical-aperture light through the fourth lens 114 to be emitted, and the distance from the focus of the OCT light to the fourth lens 114 is just 2 times of the distance from the focus of the confocal light to the fourth lens 114; meanwhile, the laser scanner couples the confocal light into the optical fiber bundle 18 of the optical fiber module, the confocal light is emitted through the optical fiber bundle 18, then is converged by the self-focusing lens 111, passes through the right-angle triangular prism 112, is reflected by two curved surfaces of the dove prism 113, then passes through the right-angle triangular prism 112 again to be emitted to the fourth lens 114, and is converged into high numerical aperture light to be emitted through the fourth lens 114; obviously, by controlling the curvature radius and the aspheric coefficient of the two curved surfaces of the dove prism 113, the numerical aperture difference between the OCT light and the confocal light can be controlled.
As shown in fig. 3, an imaging method of the OCT confocal common-path dual-mode endoscopic probe described above specifically includes the following steps:
s1: the OCT light and the confocal light are emitted out through the optical fiber module;
s2: the OCT light and the confocal light projected from the optical fiber module are expanded and shaped through the beam shaping module;
s3: the expanded and shaped OCT light and the confocal light are screened by the common-path light splitting module, so that a confocal light path is separated from an OCT light path;
s4: the confocal light independently passes through the confocal light path module and then is overlapped with the OCT light again through the common path light splitting module;
s5: the overlapped confocal light path and the OCT light path are converged and emitted by the convergence module to form the numerical aperture difference of the OCT light and the confocal light.
Compared with the prior art, the technical scheme has the following advantages:
(1) after a common-path light splitting module is used for separating a confocal light path from an OCT light path, the confocal light path is changed by the confocal light path module, and then the confocal light path and the OCT light path are overlapped by the common-path light splitting module, so that the requirement on the size of a lens is reduced, and the probe is miniaturized without moving image correction;
(2) the technical scheme adopts a common-path structure, so that the OCT confocal common-path dual-mode endoscopic probe has small size and simple processing, is convenient for the probe to be shared with an imaging channel of the existing endoscope, and realizes multi-mode imaging.
(3) The technical scheme is based on the characteristics of confocal imaging and OCT imaging, a common-path scanning probe is designed, and due to the structural characteristics, the common-path scanning probe is not easily interfered in the same environment, the stability of the system is obviously enhanced, real-time imaging can be realized, and a correction algorithm is not needed.
(4) The technical scheme is not only suitable for detecting and imaging biological tissues and measuring an optical-mechanical-electrical system in industry, but also suitable for imaging objects with other micro structures.
In the description herein, references to the description of the terms "one embodiment," "certain embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
It is to be understood that the invention is not limited to the above-described embodiments, and that modifications and variations may be made by those skilled in the art in light of the above teachings, and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (10)
1. An OCT confocal common-path dual-mode endoscopic probe is characterized by comprising:
the optical fiber module is used for connecting an optical path to realize bidirectional transmission of light;
the beam shaping module is used for expanding and shaping the OCT light and the confocal light projected from the optical fiber module;
the common-path light splitting module selectively transmits or reflects OCT light and confocal light by utilizing a dichroic film, and the module is also a part of the optical path of the OCT light and the confocal light;
the confocal optical path module only transmits confocal light, so that the confocal light obtains characteristics of focal length, aberration and numerical aperture completely different from OCT light;
the optical fiber module, the beam shaping module, the common-path light splitting module and the confocal light path module are all arranged in the probe shell.
2. The OCT confocal common-path dual-mode endoscopic probe according to claim 1, comprising an optical fiber module, a beam shaping module, a common-path light splitting module and a confocal optical path module, wherein the optical fiber module comprises an optical fiber component, and the common-path light splitting module comprises a second lens; the upper end and the lower end of the front surface of the first lens are respectively plated with a first reflecting film, the middle part of the front surface of the first lens is plated with an antireflection film, the antireflection film is positioned between the first reflecting film at the upper end and the first reflecting film at the lower end, the light beam shaping module adopts the part of the first lens plated with the antireflection film, and the confocal light path module adopts the part of the first reflecting film of the first lens; the optical fiber assembly, the first lens and the second lens are all arranged in the probe shell; the middle part of the front surface of the second lens is plated with a dichroic coating which selectively transmits OCT light and totally reflects confocal light.
3. The OCT confocal common-path dual-mode endoscopic probe of claim 2, wherein the diameter of the anti-reflection film is adapted to the diameter and the exit angle of the optical fiber assembly, and the adapted diameter of the transparent film is such that all light exiting from the optical fiber assembly does not contact the first reflection film.
4. The OCT confocal common-path dual-mode endoscopic probe of claim 2, wherein the first reflective film on the first lens has a radius of curvature that allows confocal light to have a focal length, aberration, and numerical aperture that are completely different from those of OCT light.
5. The OCT confocal common-path dual-mode endoscopic probe of claim 4, wherein the first reflective film is a gold film, a silver film, an aluminum film, or a dielectric film.
6. The OCT confocal common-path dual-mode endoscopic probe according to claim 1, comprising an optical fiber module, a beam shaping module, a common-path light splitting module and a confocal optical path module, wherein the optical fiber module comprises an optical fiber component for projecting confocal light and OCT light, the beam shaping module comprises a self-focusing lens for collimating or converging the OCT light and the confocal light at a small angle, the common-path light splitting module comprises a right-angle triangular prism, a dichroic coating selectively transmitting the OCT light and totally reflecting the confocal light is coated on a prism inclined surface of the right-angle triangular prism, and the confocal optical path module comprises a dove prism with two curved surfaces.
7. The OCT confocal common-path dual-mode endoscopic probe of any one of claims 1-6, further comprising a convergence module for converging light transmitted by the common-path light splitting module onto a measurement object, the convergence module being disposed within the probe housing.
8. The OCT confocal common-path dual-mode endoscopic probe of claim 7, wherein a protrusion structure for separating the beam shaping module, the common-path splitting module and the converging module is provided inside the probe housing.
9. The OCT confocal common-path dual-mode endoscopic probe of claim 8, wherein an inner wall of the probe housing is blackened and sandblasted to absorb scattered light, and a front end of the probe housing is configured to be transparent.
10. The OCT confocal common-path dual-mode endoscopic probe of claim 7, wherein the fiber module employs a fiber bundle.
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| CN110742574B (en) * | 2019-11-27 | 2023-12-15 | 佛山光微科技有限公司 | OCT confocal and common-path dual-mode endoscopic probe and imaging method |
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