CN112545431B - Confocal endoscope imaging device and imaging automatic compensation method - Google Patents
Confocal endoscope imaging device and imaging automatic compensation method Download PDFInfo
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- CN112545431B CN112545431B CN202011375456.8A CN202011375456A CN112545431B CN 112545431 B CN112545431 B CN 112545431B CN 202011375456 A CN202011375456 A CN 202011375456A CN 112545431 B CN112545431 B CN 112545431B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00163—Optical arrangements
- A61B1/00188—Optical arrangements with focusing or zooming features
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00002—Operational features of endoscopes
- A61B1/00057—Operational features of endoscopes provided with means for testing or calibration
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
- A61B1/07—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements using light-conductive means, e.g. optical fibres
Abstract
The invention discloses a confocal endoscope imaging device and an imaging automatic compensation method, wherein the confocal endoscope imaging device comprises an objective lens, an optical fiber bundle and a mounting seat, wherein flexible conductive plates and sleeves are arranged on the periphery of the optical fiber bundle, and an insulating layer and a guide cylinder are arranged on one side of the mounting seat; a circle of silicon-based optical sensors are embedded in the flexible conductive plate and comprise signal pins and grounding pins, the flexible conductive plate is externally connected with an imaging system, the signal pins are abutted against the flexible conductive plate, and a grounding ring protruding out of the insulating layer is further embedded in one side, close to the optical fiber bundle, of the mounting seat; the activity is provided with the card post in the guide cylinder, and the sleeve periphery wall corresponds and is provided with the draw-in groove, and when ground connection stitch and ground loop butt, the card post moves to the direction of optic fibre bundle to get into in the draw-in groove with the sleeve chucking. After the optical fiber bundle is inserted, the silicon-based optical sensor is abutted to the grounding ring, so that the influence of natural light before the installation is avoided, and the silicon-based optical detector can ensure that the detection data of the leaked light is more accurate and reliable in the use process.
Description
Technical Field
The invention belongs to the field of endoscopic imaging, and particularly relates to a confocal endoscopic imaging device and an imaging automatic compensation method.
Background
In a confocal imaging system based on an optical fiber bundle, a laser emits laser, the end face of the optical fiber bundle is scanned through a laser scanning device and a coupling objective lens, the laser is focused and then injected into each fiber core of the optical fiber bundle, and the diameter of each fiber core is about 2-3 microns. At the other end of the optical fiber bundle, the injected laser is focused on an observed object through a micro objective lens, the observed object emits fluorescence under the excitation of the injected laser, and the fluorescence returns through the fiber core of the optical fiber bundle along the same path and is finally captured and imaged by a detector. The coupling objective lens and the optical fiber bundle need to be accurately positioned, and small distance deviation can cause large fluctuation of imaging quality, so that the accurate positioning and stable maintenance of the focusing mechanism are particularly important for ensuring the normal work of the system.
However, in the operation process of the confocal endoscope system, because the probe needs to go through a bending stroke when entering the clamp channel and the target cavity tissue, the proximal end of the optical fiber bundle and the coupling objective lens are loosened to cause the misalignment of the focusing of the proximal end of the optical fiber bundle and the coupling objective lens, and light leakage occurs, so that a black spot or a dark area appears in imaging, and clinical diagnosis is disturbed.
Disclosure of Invention
In view of the above drawbacks or needs for improvement in the prior art, the present invention provides a confocal endoscopic imaging apparatus and an automatic compensation method for imaging, which aims to solve the technical problem in the prior art that it is difficult to detect the leakage light between the optical fiber bundle and the objective lens, which results in a black spot or a dark area in the imaging.
In order to achieve the above object, according to one aspect of the present invention, there is provided a confocal endoscopic imaging apparatus, including an objective lens and an optical fiber bundle, wherein the objective lens and the optical fiber bundle are focused by a mounting base, the apparatus is characterized in that a flexible conductive plate and a sleeve are sequentially sleeved on the periphery of the optical fiber bundle, an insulating layer is disposed on one side of the mounting base close to the optical fiber bundle, and a guide cylinder which is positioned in cooperation with the sleeve is fixed on the insulating layer;
a circle of silicon-based optical sensor is embedded in one side, close to the mounting seat, of the flexible conductive plate, the silicon-based optical sensor comprises a signal pin and a grounding pin, the flexible conductive plate is made of a flexible conductive material and is externally connected with an imaging system, the signal pin is abutted against the flexible conductive plate, and a grounding ring protruding out of the insulating layer is further embedded in one side, close to the optical fiber bundle, of the mounting seat;
the guide cylinder internalization is provided with the card post, the sleeve periphery wall corresponds and is provided with the draw-in groove, works as the ground connection stitch with during ground connection ring butt, the card post moves to the direction of optic fibre bundle, in order to get into will in the draw-in groove the sleeve chucking.
Through the technical scheme, the silicon-based optical sensor is arranged on the periphery of the optical fiber bundle, the silicon-based optical sensor can be driven to enter the focusing position of the objective lens and the optical fiber bundle when the optical fiber bundle is inserted, and the silicon-based optical sensor is abutted against the grounding ring after the optical fiber bundle is inserted, so that the silicon-based optical sensor can work, the silicon-based optical sensor is prevented from being influenced by light in a 600nm waveband of 380-plus-one under the condition of natural light before the silicon-based optical sensor is not installed, and the silicon-based optical detector can be used for ensuring that the detection data of leaked light is more accurate and reliable in the using process. According to the technical scheme, the leakage light between the optical fiber bundle and the objective lens is detected through the silicon-based optical detector, the plurality of detectors are arranged around the periphery of the optical fiber bundle, the positioning of the specific optical fiber which is leaked according to different detection values is facilitated, and the compensation of the leakage light is facilitated.
In another aspect of the present invention, there is provided a confocal endoscopic imaging automatic compensation method, including the following steps:
s1, the sleeve is held by hand and inserted into the guide cylinder, the grounding pin of the silicon-based optical sensor is abutted to the grounding ring, and the clamping column moves towards the direction of the optical fiber bundle and enters the clamping groove to clamp the sleeve;
s2, acquiring tissue images with different brightness under different excitation light power intensities, calibrating by using signal currents with different intensities, fitting the images with different brightness, and establishing a pixel brightness threshold map;
s3, a circle of silicon-based optical detectors at the end of the optical fiber bundle detects leakage light between the objective lens and the optical fiber bundle in real time, and converts the leakage light power intensity P 'detected by different silicon-based optical sensors into a leakage current signal A' to be output;
s4, the imaging system receives the leakage current signal A 'of different silicon-based optical sensors and converts the leakage current signal A' into a defect current signal I which can be identified by the display unit of the imaging system;
s5, compensating the leaked specific optical fiber according to the obtained defect current signal I so as to compensate the dark area of the tissue image;
s6, the sleeve is held by hand and is pulled out forcibly, the clamping column moves towards the direction far away from the optical fiber bundle, the grounding pin of the silicon-based optical sensor is far away from the grounding ring, and the grounding ring protrudes towards the direction close to the optical fiber bundle for the next insertion of the optical fiber bundle.
By this method, the device is used to detect the leakage light and convert it to a defective signal current to compensate and make the image uniform without black or dark spots.
Drawings
FIG. 1 is a schematic view of the arrangement of the optical fiber bundle as it is inserted into the mounting block;
FIG. 2 is a schematic view of the device with the fiber bundle pulled out of the mounting base;
FIG. 3 is an enlarged schematic view of portion A of FIG. 1;
FIG. 4 is an enlarged schematic view of portion B of FIG. 2;
fig. 5 is a pixel brightness threshold map of a standard luminal organ.
In the figure, 1, a mounting seat; 11. an insulating layer; 12. a first vertical slot; 13. a ground ring; 131. a horizontal spring; 14. a lifting column; 2. a fiber optic bundle; 21. a flexible conductive plate; 211. mounting grooves; 212. a silicon-based optical sensor; 2121. a signal pin; 2122. a grounding pin; 213. glue; 214. a protrusion; 22. a sleeve; 221. a card slot; 23. conducting rings; 24. a lead wire; 3. a guide cylinder; 31. a second vertical slot; 311. clamping the column; 32. a transverse groove; 321. a lever; 4. an objective lens;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1 and 2, the present invention provides a confocal endoscopic imaging apparatus, which includes an objective lens 4 and an optical fiber bundle 2, wherein the objective lens 4 and the optical fiber bundle 2 are focused by a mounting base 1 and are respectively located at two sides of the mounting base 1, a flexible conductive plate 21 is sleeved on the periphery of the optical fiber bundle 2, a sleeve 22 is sleeved on the periphery of the flexible conductive plate 21, and the sleeve 22 is made of an insulating material, so as to be convenient for being held by hand. The installation seat 1 is provided with an insulating layer 11 on one side close to the optical fiber bundle 2, a guide cylinder 3 which is matched and positioned with the sleeve 22 is fixed on the insulating layer 11, and the inner diameter of the guide cylinder 3 is the same as the outer diameter of the sleeve 22.
As shown in fig. 3, a ring of silicon-based optical sensors 212 is embedded in one side of the flexible conductive plate 21 close to the mounting base 1, the silicon-based optical sensors 212 include signal pins 2121 and ground pins 2122, the signal pins 2121 of the silicon-based optical sensors are abutted to the flexible conductive plate 21, the flexible conductive plate 21 is made of a flexible conductive material, and the flexible conductive plate 21 is externally connected with an imaging system, so that the signal pins 2121 of the silicon-based optical sensors 212 are connected with the imaging system.
Specifically, a circle of mounting groove 211 is formed in one side, close to the mounting seat 1, of the flexible conductive plate 21, the silicon-based optical sensors 212 are distributed in the mounting groove 211 in a circumferential array mode, glue 213 is filled in the mounting groove 211, and the silicon-based optical sensors 212 are fixed in the flexible conductive plate 21 through the glue 213 in a sticking mode. The flexible conductive plate 21 is provided with a protrusion 214 on the inner wall of the mounting groove 211 close to the optical fiber bundle 2, and the protrusion 214 can enable the signal pin 2121 of the silicon-based optical sensor 212 to better abut against the flexible conductive plate 21 when the silicon-based optical sensor 212 is in the mounting groove 211. When the silicon-based optical sensor 212 is placed in the mounting groove 211, the signal pins 2121 of the silicon-based optical sensor 212 abut against the protrusions 214, and a gap exists between one end far from the signal pins 2121, that is, the ground pins 2122 and the inner wall of the mounting groove 211, so that the glue 213 is filled in, and insulation is maintained between the ground pins 2122 and the flexible conductive plate 21. The conductive ring 23 is further disposed in the sleeve 22 around the optical fiber bundle 2, the conductive ring 23 contacts the flexible conductive plate 21, and the conductive ring 23 is connected to an external imaging system through a lead 24, so as to connect the silicon-based optical sensor 212 to the imaging system.
As shown in fig. 3 and 4, a grounding ring 13 is embedded in the mount 1 on the side close to the optical fiber bundle 2, the grounding pin 2122 of the silicon-based photosensor 212 is abutted against the grounding ring 13 after the optical fiber bundle 2 is inserted into the mount 1, and the mount 1 is grounded, so that the grounding pin 2122 is grounded. The grounding ring 13 protrudes from the insulating layer 11 and can be better contacted with the grounding pin 2122, and when the optical fiber bundle 2 is pulled out from the mounting base 1 by the handheld sleeve 22, the grounding pin 2122 of the silicon-based optical sensor 212 is separated from the grounding ring 13.
When the operator holds the sleeve 22 and enters the guiding cylinder 3, the silicon-based optical sensor 212 embedded in the flexible conductive plate 21 moves toward the mounting base 1, and finally the grounding pin 2122 abuts against the grounding ring 13. The grounding ring 13 is fixed in the mounting seat 1 by the horizontal spring 131, and therefore can move horizontally, when the grounding pin 2122 of the silicon-based optical sensor 212 abuts against the grounding ring 13, the grounding ring 13 is pushed to move away from the optical fiber bundle 2, and at this time, the horizontal spring 131 is in a stretching state. After the grounding pin 2122 leaves the grounding ring 13, the horizontal spring 131 is in a natural state, and the grounding ring 13 protrudes from the insulating layer 11.
The movable card post 311 that is provided with in the guide cylinder 3, the direction of motion perpendicular to guide cylinder 3's of card post 311 axis direction, the periphery wall correspondence of sleeve 22 is provided with draw-in groove 221, the bottom of card post 311 is the inclined plane at guide cylinder 3 two epaxial faces, make the bottom of card post 311 be triangle-shaped or fall trapezoidal, the shape of draw-in groove 221 corresponds with it, therefore, after card post 311 enters into draw-in groove 221 and locks, when operating personnel extracts sleeve 22 hard, the dynamics exceeds under the condition of certain threshold value, can make card post 311 leave from draw-in groove 221 through the inclined plane setting of card post 311 bottom, thereby reach the purpose of unblock.
When the grounding pin 2122 abuts against the grounding ring 13, i.e. the grounding ring 13 is pushed to move horizontally, the clamping column 311 moves towards the direction of the optical fiber bundle 2 at the same time, so as to enter the clamping slot 221 to realize locking. This is because the interlocking member is provided between the ground ring 13 and the clip 311. Specifically, an L-shaped first vertical groove 12 is formed in the mounting base 1, the ground ring 13 is located in a horizontal section of the first vertical groove 12, the cross section of the ground ring 13 is cross-shaped, the upper end and the lower end of the ground ring 13 abut against the inner wall of the horizontal section of the first vertical groove 12, so that horizontal movement of the ground ring 13 is limited, the horizontal spring 131 is horizontally fixed between the upper end and the lower end and the inner wall of the base, when the ground ring 13 moves to the leftmost end of the horizontal section of the first vertical groove 12, the horizontal spring 131 is stretched, and a small part of the right end of the ground ring 13 protrudes out of the insulating layer 11 to be in contact conduction with the silicon-based optical sensor 212 better. In addition, set up the second vertical slot 31 that is on a parallel with first vertical slot 12 in guide cylinder 3, the top of the vertical section of first vertical slot 12 and the top of second vertical slot 31 are through horizontal groove 32 intercommunication, and calorie post 311 sets up in second vertical slot 31, and the size of second vertical slot 31 is the same with the size of calorie post 311, is favorable to getting into/leaving the draw-in groove 221 to the calorie post 311 and leads spacingly, avoids crooked. In the vertical section of first vertical slot 12, be provided with lift post 14, the bottom of lift post 14 sets up to the inclined plane in the one side that is close to fiber bundle 2, the one side that fiber bundle 2 was kept away from to ground ring 13 also sets up to the inclined plane, these two inclined planes mutually support, the angle sum of seting up is 90, thereby can carry out interconversion with the horizontal motion of ground ring 13 and the vertical motion of lifter, the size of lift post 14 is the same with the size of the vertical section of first vertical slot 12, thereby guide the motion of lift post 14, avoid crooked.
A lever 321 connecting the top of the lifting column 14 and the top of the clamping column 311 is arranged in the transverse slot 32, when the lifting column 14 moves in the direction away from the optical fiber bundle 2, the clamping column 311 moves in the direction close to the optical fiber bundle 2, and when the clamping column 311 moves in the direction away from the optical fiber bundle 2, the lifting column 14 moves in the direction close to the optical fiber bundle 2; that is, when the handheld sleeve 22 is inserted into the guide cylinder 3, the silicon-based optical sensor 212 abuts against the grounding ring 13, and then pushes the grounding ring 13 to move in the direction in which the optical fiber bundle 2 is inserted, so that the lifting column 14 moves in the direction away from the optical fiber bundle 2, and the clamping column 311 approaches the optical fiber bundle 2 and enters the clamping groove 221 to realize locking. When the grip sleeve 22 is pulled out with force, the latch 311 moves away from the optical fiber bundle 2, causing the lift pin 14 to move closer to the optical fiber bundle 2, so that the pushing/elastic force pulls the ground ring 13 to move in the direction in which the optical fiber bundle 2 is pulled out. The two ends of the lever 321 are connected to the lifting column 14 or the clamping column 311 by means of hinges, which is beneficial to realize the opposite movement of the lifting column 14 and the clamping column 311.
The two clamp posts 311 are preferably symmetrically distributed, so that the two sets of linkage assemblies between the ground ring 13 and the clamp posts 311 are preferably also symmetrically distributed, the ground ring 13 is in a ring shape surrounding the optical fiber bundle 2, because the silicon-based optical sensors 212 are circumferentially distributed on the flexible conductive plate 21 in an array manner, and the clamp slot 221 is also formed in the outer peripheral wall of the sleeve 22 in a circle, when the optical fiber bundle 2 is inserted, the clamp posts 311 and the clamp slot 221 can be matched at any position without adjusting the position, and in a corresponding case, the silicon-based optical sensors 212 can be abutted and conducted with the ground ring 13.
The invention also provides an automatic compensation method for confocal endoscope imaging, which comprises the following steps:
s1, referring to fig. 1, the sleeve 22 is held by hand and inserted into the guiding cylinder 3 until the grounding pin 2122 of the silica-based optical sensor 212 abuts against the grounding ring 13, the grounding ring 13 is pushed to move along the insertion direction of the optical fiber bundle 2, so as to push the lifting pin 14 away from the optical fiber bundle 2, and further the lever 321 makes the clamping pin 311 move towards the optical fiber bundle 2 and enter the clamping slot 221 to clamp the sleeve 22, and in the clamping state, a small portion of the grounding ring 13 still protrudes out of the insulating layer 11 to better abut against the grounding pin 2122.
S2, after the installation, the power intensity of different exciting lights (P) is applied to a standard cavity tissue0、P1、P2、.....Pn....Pn+a) Obtaining tissue images with different brightness, and calibrating with signal current with different intensity (corresponding to I)0、I1、I2、.....In....In+a) And fitting the images with different brightness to establish a pixel brightness threshold map, as shown in fig. 5.
S3, the ring of silica-based optical detectors 212 at the end of the optical fiber bundle 2 detects leakage light between the objective lens 4 and the optical fiber bundle 2 in real time, when leakage occurs, the leakage light power intensities detected by different silica-based optical sensors 212 are different, and the leakage light power intensities P ' detected by different silica-based optical sensors 212 are correspondingly converted into leakage current signals a ' to be output, where the leakage light power intensities P ' are in a linear corresponding relationship.
S4, the imaging system receives the leakage current signal a 'of the different silicon-based photosensors 212, locates a specific optical fiber where leakage occurs according to the position of the corresponding silicon-based photosensor 212, then takes the mean value a, and converts the mean value a into a defect current signal I that can be recognized by the display unit of the imaging system, where I is kA, k is a correction factor, k is P/Pa, P is the mean value of the leakage light power intensities P' of the different silicon-based photosensors 212, and Pa is the output power intensity corresponding to the pixel brightness threshold map of a in S1.
S5, compensating the leaked specific optical fiber according to the obtained defect current signal I, thereby compensating the dark area of the tissue image;
s6, the sleeve 22 is held by hand and pulled out forcibly, when the force exceeds a certain threshold, the clamping column 311 moves towards the direction far away from the optical fiber bundle 2 due to the action of the bottom inclined plane, the lifting column 14 is driven to approach the optical fiber bundle 2 through the lever 321, so that the grounding ring 13 moves towards the direction of pulling out the optical fiber bundle 2 one barrel under the action of the bottom inclined plane of the lifting column 14 and the action of the horizontal spring 131, when the optical fiber bundle 2 is pulled out, the grounding pin 2122 of the silicon-based optical sensor 212 is far away from the grounding ring 13, and most of the grounding ring 13 protrudes towards the direction close to the optical fiber bundle 2, so that the method is repeated when the optical fiber bundle 2 is inserted next time.
By the method, the optical fiber bundle 2 with the silicon-based optical sensor 212 is inserted into the mounting seat 1, so that in the working process, the silicon-based optical sensor 212 can detect the leakage light between the optical fiber bundle 2 and the objective lens 4 due to focusing misalignment and the like and convert the leakage light into the defect current signal I, thereby performing targeted compensation, ensuring that the finally obtained image is uniform and has no black points or dark points, being beneficial to improving the diagnosis reliability and reducing the missed diagnosis and misdiagnosis.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A confocal endoscope imaging device comprises an objective lens and an optical fiber bundle, wherein the objective lens and the optical fiber bundle are focused through a mounting seat, and the confocal endoscope imaging device is characterized in that a flexible conductive plate and a sleeve are sequentially sleeved on the periphery of the optical fiber bundle, an insulating layer is arranged on one side, close to the optical fiber bundle, of the mounting seat, and a guide cylinder which is matched and positioned with the sleeve is fixed on the insulating layer;
a circle of silicon-based optical sensor is embedded in one side, close to the mounting seat, of the flexible conductive plate, the silicon-based optical sensor comprises a signal pin and a grounding pin, the flexible conductive plate is made of a flexible conductive material and is externally connected with an imaging system, the signal pin is abutted against the flexible conductive plate, and a grounding ring protruding out of the insulating layer is further embedded in one side, close to the optical fiber bundle, of the mounting seat;
a clamping column is movably arranged in the guide cylinder, a clamping groove is correspondingly formed in the outer peripheral wall of the sleeve, and when the grounding pin abuts against the grounding ring, the clamping column moves towards the direction of the optical fiber bundle to enter the clamping groove to clamp the sleeve;
a first vertical groove is formed in the mounting seat, a second vertical groove is formed in the guide cylinder, the first vertical groove is communicated with the second vertical groove through a transverse groove, a lifting column is arranged in the first vertical groove, the clamping column is arranged in the second vertical groove, and a lever for connecting the lifting column with the top of the clamping column is arranged in the transverse groove, so that the lifting column and the clamping column are opposite in moving direction;
the bottom of the lifting column and one side, close to the lifting column, of the grounding ring are provided with mutually matched inclined planes so as to convert the horizontal motion of the grounding ring into the vertical motion of the lifting column.
2. The confocal endoscopic imaging apparatus according to claim 1, wherein two faces of the bottom of the card post in the axial direction of the guide cylinder are inclined.
3. The confocal endoscope imaging apparatus according to claim 1, wherein a circle of mounting groove is formed on one side of the flexible conductive plate close to the mounting seat, a protrusion is formed on an inner wall of the mounting groove close to the optical fiber bundle, the mounting groove is filled with glue, the silicon-based optical sensor is embedded in the flexible conductive plate through the glue, and the signal pin abuts against the flexible conductive plate through the protrusion.
4. The confocal endoscopic imaging apparatus according to claim 3, wherein a conductive ring abutting against the flexible conductive plate is further sleeved between the sleeve and the circumferential side of the optical fiber bundle, and the flexible conductive plate is externally connected to an imaging system through the conductive ring.
5. The confocal endoscopic imaging apparatus of claim 1, wherein the ground ring is connected to the inner wall of the first vertical slot by a horizontal spring, the ground ring is horizontally moved by the horizontal spring to abut/not abut the ground pin, wherein the spring is in a stretched state when the ground pin abuts the ground ring; when the grounding pin is not abutted to the grounding ring, the spring is in a natural state.
6. A method for automatically compensating confocal endoscopic imaging, for compensating the confocal endoscopic imaging apparatus of claim 1, comprising the steps of:
s1, the sleeve is held by hand and inserted into the guide cylinder, the grounding pin of the silicon-based optical sensor is abutted to the grounding ring, and the clamping column moves towards the direction of the optical fiber bundle and enters the clamping groove to clamp the sleeve;
s2, acquiring tissue images with different brightness under different excitation light power intensities, calibrating by using signal currents with different intensities, fitting the images with different brightness, and establishing a pixel brightness threshold map;
s3, a circle of silicon-based optical detectors at the end of the optical fiber bundle detects leakage light between the objective lens and the optical fiber bundle in real time, and converts the leakage light power intensity P 'detected by different silicon-based optical sensors into a leakage current signal A' to be output;
s4, the imaging system receives the leakage current signal A 'of different silicon-based optical sensors and converts the leakage current signal A' into a defect current signal I which can be identified by the display unit of the imaging system;
s5, compensating the leaked specific optical fiber according to the obtained defect current signal I so as to compensate the dark area of the tissue image;
s6, the sleeve is held by hand and is pulled out forcibly, the clamping column moves towards the direction far away from the optical fiber bundle, the grounding pin of the silicon-based optical sensor is far away from the grounding ring, and the grounding ring protrudes towards the direction close to the optical fiber bundle for the next insertion of the optical fiber bundle.
7. The method for automatically compensating confocal endoscope imaging according to claim 6, wherein the imaging system in S4 is configured to locate a specific fiber where leakage occurs according to the position of the silicon-based optical sensor after receiving the leakage current signal A' of different silicon-based optical sensors.
8. The method for automatic compensation of confocal endoscopic imaging according to claim 7, wherein the step of converting the leakage current signal a' into the defect current signal I by the imaging system in S4 comprises:
taking an average value A of leakage current signals A' of different silicon-based photosensors, wherein I is kA, and k is a correction factor;
and k is P/Pa, wherein P is the average value of the leakage light power intensities P' of different silicon-based light sensors, and Pa is the corresponding output power intensity of A in the pixel brightness threshold map.
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| US5821530A (en) * | 1996-01-16 | 1998-10-13 | Wireless Control Systems, Inc | Coadunate emitter/detector for use with fiber optic devices |
| JPH10332985A (en) * | 1997-05-27 | 1998-12-18 | Canon Inc | Jig used for adjusting lens position and lens position adjusting method using it |
| US7009692B2 (en) * | 1999-08-06 | 2006-03-07 | Lumenis Inc. | Arrangement for monitoring the power delivery of a photon channeling element |
| US6690459B2 (en) * | 2001-03-05 | 2004-02-10 | Trex Enterprises, Corp. | Method and apparatus for fiber alignment using light leaked from cladding |
| CN1145051C (en) * | 2001-10-22 | 2004-04-07 | 中国科学院上海光学精密机械研究所 | Laser diode with wide emitting surface and single-mode optical fibre coupler |
| JP5754317B2 (en) * | 2011-09-15 | 2015-07-29 | 富士通株式会社 | Optical connector |
| CN110755019B (en) * | 2019-10-18 | 2024-01-09 | 精微视达医疗科技(三亚)有限公司 | Confocal system with ID recognition function |
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