CN110906869A - OCT probe adjusting device - Google Patents
OCT probe adjusting device Download PDFInfo
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- CN110906869A CN110906869A CN201911155362.7A CN201911155362A CN110906869A CN 110906869 A CN110906869 A CN 110906869A CN 201911155362 A CN201911155362 A CN 201911155362A CN 110906869 A CN110906869 A CN 110906869A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
- G01B11/0616—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material of coating
- G01B11/0675—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material of coating using interferometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
- G01B11/0691—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material of objects while moving
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B9/00—Measuring instruments characterised by the use of optical techniques
- G01B9/02—Interferometers
- G01B9/02049—Interferometers characterised by particular mechanical design details
- G01B9/0205—Interferometers characterised by particular mechanical design details of probe head
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B9/00—Measuring instruments characterised by the use of optical techniques
- G01B9/02—Interferometers
- G01B9/0209—Low-coherence interferometers
- G01B9/02091—Tomographic interferometers, e.g. based on optical coherence
Abstract
The invention relates to the technical field of optical scanning imaging, and provides an OCT probe adjusting device, which comprises: the device comprises an adjusting assembly, a mounting seat and a probe assembly; the adjusting assembly comprises: the movable seat is used for adjusting the position of the movable seat in the Z-axis direction of the fixed seat; the mount pad is installed on the sliding seat, and probe subassembly is located on the mount pad. The position of the probe assembly in the Y-axis direction is adjusted through the adjusting assembly, the coherence of light is guaranteed to be in the middle position of a sample to be collected, the position of the probe assembly in the Z-axis direction is adjusted through the adjusting assembly, and when the probe assembly collects sample data, light spots are focused on the surface of the sample, so that the probe assembly is convenient to adjust the position, high-resolution imaging is achieved, the scanning range is improved, and therefore the device can be suitable for moving sample detection on an industrial production line and batch detection of capsules is achieved.
Description
Technical Field
The invention relates to the technical field of optical scanning imaging, in particular to an OCT probe adjusting device.
Background
An Optical Coherence Tomography (OCT) is an imaging technique based on Optical Coherence properties, which is based on the principle of weak Coherence interference, and obtains depth information of a sample by measuring interference signals of reflected light of the sample and reflected light of a reference arm, and uses a scanning device on the sample arm to realize two-dimensional or three-dimensional imaging of the sample, thereby achieving the purpose of Tomography. Due to the adoption of the broadband light source with short coherence length, higher axial resolution can be obtained, generally 8-15 mu m, and if the technologies such as an ultra-wideband light source are adopted, the axial resolution can be as high as 3 mu m, which is superior to the traditional imaging modes such as ultrasound and MRI. The advantages of optical heterodyne and scanning tomography technology are combined, and the method has the advantages of high sensitivity and high resolution, and can be detected in vivo without damage.
At present, OCT is mainly applied in medical field, such as diagnosis of ophthalmic diseases, and detection in industrial production line, especially on sports samples, is relatively few. The capsule is a medicine consisting of a base material and an adhesive, two separated base materials are connected together through adhesion, various polymers in production places are used as the adhesive along with the progress of industrial development, and defective products such as glue leakage, little glue and the like often occur in the actual production process, so the quality of capsule products is influenced. Therefore, the detection of the encapsulation condition of the capsule by the OCT technology is an important means for ensuring the quality of the capsule, however, in the detection process of the OCT technology, due to the limitation of the probe structure in the OCT technology, the adjustment of the probe generally has the problems of small scanning range, difficult adjustment and time consumption.
Disclosure of Invention
The invention aims to provide an OCT probe adjusting device, and aims to solve the technical problem that in the prior art, the probe is difficult to adjust.
In order to achieve the purpose, the invention adopts the technical scheme that: an OCT probe adjustment device, comprising: the device comprises an adjusting assembly, a mounting seat and a probe assembly; the adjustment assembly includes: the movable seat is movably arranged on the fixed seat, the Z-axis adjusting piece is used for adjusting the position of the movable seat in the Z-axis direction of the fixed seat, and the Y-axis adjusting piece is used for adjusting the position of the movable seat in the Y-axis direction of the fixed seat; the mounting seat is installed on the movable seat, and the probe assembly is arranged on the mounting seat.
In one embodiment, one side that the fixing base is close to the sliding seat is equipped with the Z axle recess, one side that the sliding seat is close to the fixing base is equipped with the Y axle recess, be equipped with the Z axle piece in the Z axle recess, be equipped with the Y axle piece in the Y axle recess, the one end of Z axle piece pass through first connecting piece with the sliding seat is connected, the other end of Z axle piece is equipped with the Z axle regulating part, the one end of Y axle piece pass through the second connecting piece with the fixing base is connected, the other end of Y axle piece is equipped with the Y axle regulating part.
In one embodiment, the Z-axis adjustment member includes: the first micrometer head is arranged on the fixed seat, and the first distance adjusting block is arranged on the Y-axis block; the Y-axis adjusting member includes: the second micrometer head is arranged on the Z-axis block, and the second distance adjusting block is arranged on the mounting seat.
In one embodiment, the first connector includes: a first connecting plate and a first tightening knob; one end of the first connecting plate is arranged on the end face of the Z-axis block through a fastener, the other end of the first connecting plate covers the end face of the movable seat and is provided with a Y-axis long groove, and the first tightening knob penetrates through the Y-axis long groove to be in threaded connection with the movable seat and abuts against the first connecting plate; the second connector includes: one end of the second connecting plate is arranged on the end face of the Y-axis block through a fastener, the other end of the second connecting plate covers the end face of the fixing seat and is provided with a Z-axis long groove, and the second tightening knob penetrates through the Z-axis long groove to be in threaded connection with the fixing seat and abuts against the second connecting plate.
In one embodiment, the mount includes: the vertical part is connected with the movable seat through a fastener, the vertical part is further provided with an OCT assembly, and the probe assembly is arranged on the horizontal part.
In one embodiment, a side of the vertical portion away from the movable base is provided with a lens barrel, a mounting surface is arranged below the lens barrel, and the OCT component includes: locate the collimating mirror in the lens cone with locate reflector on the installation face, probe subassembly includes: locate objective on the horizontal part to and rotate and locate the mirror that shakes above the objective, objective with the light of collimating mirror is vertical to be set up, shake the mirror with the surface of speculum is 45 settings with the horizontal basal plane.
In one embodiment, the vertical portion is integrally formed with the horizontal portion.
In one embodiment, the peripheral surface of the lens barrel is provided with a plurality of threaded holes at intervals along the axial direction, and the threaded holes are screwed with jackscrews which can be abutted against the collimating lens.
In one embodiment, the horizontal part is provided with a convex part, the convex part is provided with a mounting groove and a deformation groove communicated with the mounting groove, the vibrating mirror is arranged in the mounting groove, and the convex part is provided with a screw which penetrates through the deformation groove to clamp the vibrating mirror.
In one embodiment, a protective cover is arranged on the horizontal part, the protective cover, the vertical part and the convex part are matched to form a closed cavity, and the vibrating mirror and the reflecting mirror are arranged in the closed cavity.
The invention has the beneficial effects that:
according to the OCT probe adjusting device provided by the invention, the position of the probe assembly in the Y-axis direction is adjusted through the adjusting assembly, so that the coherence of light is ensured to be in the middle position of a sample to be acquired, the position of the probe assembly in the Z-axis direction is adjusted through the adjusting assembly, and light spots are ensured to be focused on the surface of the sample when the probe assembly acquires sample data, so that the position adjustment is realized through the adjusting assembly.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic overall structural diagram of an OCT probe adjustment apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an overall structure of an OCT probe adjustment apparatus provided by an embodiment of the invention with a protective cover separated;
FIG. 3 is a schematic diagram of an exploded structure of an OCT probe adjustment apparatus provided by an embodiment of the invention;
FIG. 4 is a schematic view of an overall structure of a mounting base in an OCT probe adjustment apparatus according to an embodiment of the present invention
FIG. 5 is a schematic top plan view of an adjustment assembly in an OCT probe adjustment apparatus provided by an embodiment of the invention;
FIG. 6 is a cross-sectional view taken at A-A of FIG. 5;
FIG. 7 is a cross-sectional view taken at B-B of FIG. 5;
FIG. 8 is a schematic diagram of an overall structure of an adjusting assembly in the OCT probe adjusting device according to the embodiment of the invention;
FIG. 9 is a schematic view of an adjusting assembly of the OCT probe adjusting apparatus according to the embodiment of the invention;
fig. 10 is a schematic view of an alternative view angle oblique bottom view of an adjusting assembly in the OCT probe adjusting device according to the embodiment of the present invention.
Reference numerals: 1. an adjustment assembly; 11. a fixed seat; 111. a Z-axis groove; 112. a Z-axis block; 12. a movable seat; 121. a Y-axis groove; 122. a Y-axis block; 13. a Z-axis adjustment member; 131. a first micrometer head; 132. a first distance adjusting block; 14. a Y-axis adjustment member; 141. a second micrometer head; 142. a second distance adjusting block; 2. a mounting seat; 21. a vertical portion; 211. a lens barrel; 2111. a threaded hole; 212. a mounting surface; 22. a horizontal portion; 23. a convex portion; 231. mounting grooves; 232. a deformation groove; 233. a counter bore; 24. a protective cover; 3. a probe assembly; 31. an objective lens; 311. a protective cylinder; 32. a galvanometer; 4. a first connecting member; 41. a first connecting plate; 411. a long Y-axis groove; 42. a first tightening knob; 5. a second connecting member; 51. a second connecting plate; 511. a Z-axis long groove; 52. a second tightening knob; 6. an OCT component; 61. a collimating mirror; 62. a mirror.
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 or similar 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 drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "Z-axis," "Y-axis," and the like, are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and for simplicity in description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated in a particular orientation, and thus should not be construed as limiting the 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, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1 to 3, an embodiment of the present invention provides an OCT probe adjustment device, which is used for performing encapsulation detection on products such as capsules in an industrial production line. The OCT probe adjusting device of the implementation utilizes an OCT technical system to detect the encapsulation condition of the capsule.
In this embodiment, the OCT probe adjustment device is disposed on a mounting rack on a main frame or a production line of the OCT technology system and above an industrial production line, wherein the capsule sample is transported in the X-axis direction. Specifically, the OCT probe adjustment device includes: an adjustment assembly 1, a mounting base 2 and a probe assembly 3. The adjustment assembly 1 comprises: the device comprises a fixed seat 11, a movable seat 12 movably arranged on the fixed seat 11, a Z-axis adjusting piece 13 used for adjusting the position of the movable seat 12 in the Z-axis direction of the fixed seat 11, and a Y-axis adjusting piece 14 used for adjusting the position of the movable seat 12 in the Y-axis direction of the fixed seat 11; fixing base 11 is fixed on body frame or mounting bracket for make OCT probe adjusting device fixed mounting the relevant position on industrial production line, mount pad 2 is installed and can be followed 12 synchronous motion of sliding seat on sliding seat 12, and probe subassembly 3 is located on mount pad 2 and is followed 2 synchronous motion of mount pad, and probe subassembly 3 is located the top of sample and just carries out sample arm data collection to the sample. In the present embodiment, as shown in fig. 1, the Y-axis represents the lateral direction based on the horizontal base surface, and the Z-axis represents the height direction based on the horizontal base surface.
According to the OCT probe adjusting device provided by the embodiment of the invention, the position of the probe assembly 3 in the Y-axis direction is adjusted through the adjusting assembly 1, so that a light spot is ensured to be in the middle of the sample to be acquired, the position of the probe assembly 3 in the Z-axis direction is adjusted through the adjusting assembly 1, and the light spot is ensured to be focused on the surface of the sample when the probe assembly 3 acquires sample data, so that the position adjustment of the probe assembly 3 is facilitated, high-resolution imaging is realized, the scanning range is improved, and therefore, the OCT probe adjusting device can be suitable for moving sample detection on an industrial production line, and the batch detection of capsules is realized.
In the present embodiment, as shown in fig. 1 to 3, the OCT probe adjustment apparatus further includes an OCT component 6. Specifically, the mount 2 includes: a vertical part 21 and a horizontal part 22, wherein the vertical part 21 is fixedly connected with the movable seat 12 through a fastener such as a screw, and the OCT component 6 is arranged on the vertical part 21.
As shown in fig. 2 and 3, a lens barrel 211 is provided on the side of the vertical portion 21 away from the movable base 12, a mounting portion is provided below the lens barrel 211, a mounting surface 212 is provided on the mounting portion, and the mounting surface 212 is an inclined surface and forms an angle of 45 ° with the horizontal base surface. Wherein the OCT component 6 comprises: a collimating mirror 61 disposed in the lens barrel 211 and a reflecting mirror 62 disposed on the mounting surface 212, wherein the optical path between the collimating mirror 61 and the reflecting mirror 62 is a reference arm, and the reflecting mirror 62 is a plane mirror. The OCT system further includes components such as a beam splitter and a sample optical fiber connected to the probe assembly 3, and also includes components such as a controller, a spectrometer, and a light source connected to the OCT assembly 6, wherein the principle of the OCT system is a mature technology, and the OCT system is widely used and is not described herein.
In the present embodiment, the probe assembly 3 is provided on the horizontal portion 22, and the probe assembly 3 includes: an objective lens 31 disposed on the horizontal portion 22, and a galvanometer lens 32 rotatably disposed above the objective lens 31, the probe assembly 3 being used for acquiring a sample arm. In the embodiment, the reference arm and the sample arm are arranged on the same mounting base 2, so that errors caused by mounting of various parts are effectively reduced. The objective lens 31 and the light of the collimator lens 61 are vertically arranged and parallel to each other, and the surfaces of the galvanometer lens 32 and the reflector 62 are arranged at 45 degrees to the horizontal base surface. The objective lens 31 is located above the sample, and a protective cylinder 311 for protecting the objective lens 31 is further provided at the bottom of the horizontal portion 22, and the protective cylinder 311 is fixed to the bottom of the horizontal portion 22 by a plurality of fasteners such as screws. The objective lens 31 is fixed to the horizontal portion 22 by means of a screw. In the present embodiment, the objective lens 31 and the galvanometer 32 have a first optical axis, the mirror 62 and the collimator 61 have a second optical axis, and the first optical axis and the second optical axis are parallel. In the present embodiment, the adjustment assembly 1 is used to adjust the sample arm of the probe assembly 3 for scanning the sample, so as to adjust the optical path length difference between the sample arm and the reference arm provided by the OCT assembly 6.
In this embodiment, vertical portion 21 and horizontal part 22 integrated into one piece make speculum 62, galvanometer 32 and objective 31 fix simultaneously on same mount pad 2 like this, the assembly error between vertical portion 21 and horizontal part 22 has been reduced, further guarantee that the error of actual light path and theoretical light path is at steerable within range, make things convenient for OCT probe adjusting device to debug, the efficiency of product research and development is improved, simultaneously under the prerequisite in the aspect of satisfying the performance requirement, its thermal diffusivity has been guaranteed, assembly simplicity and outward appearance aesthetic property.
As shown in fig. 3 and 4, a plurality of screw holes 2111 are provided at intervals in the axial direction on the circumferential surface of the lens barrel 211, and screws that can abut against the collimator lens 61 are screwed to the screw holes 2111. The collimating mirror 61 is installed in the lens barrel 211 and passes through the threaded hole 2111 through a jackscrew in a threaded manner for position fixing, so that the position of the collimating mirror 61 installed in the lens barrel 211 is conveniently adjusted, and therefore optical path adjustment of the reference arm is achieved, and the error of the reference arm is guaranteed to be within a controllable range.
As shown in fig. 3 and 4, the horizontal portion 22 is provided with a convex portion 23, the convex portion 23 is provided with an installation groove 231 and a deformation groove 232 communicated with the installation groove 231, the installation groove 231 is a through hole with a shape matched with the vibrating mirror 32, the convex portion 23 is further provided with a counter bore 233 penetrating the convex portion 23, and the direction of the counter bore 233 is perpendicular to the axial direction of the installation groove 231. Wherein, the mirror 32 that shakes is located in mounting groove 231, counter bore 233 department threaded connection has the screw, the screw is socket head cap screw, the screw passes counter bore 233 and deformation groove 232 back messenger and is located the convex part 23 of deformation groove 232 both sides and draws close each other, thereby make the width of mounting groove 231 narrow and will shake the mirror 32 and press from both sides tightly, guaranteed the stability and the thermal diffusivity of the installation of mirror 32 angle that shakes like this, make the heat that shakes mirror 32 and produce when gathering data in succession distribute away through heat-conducting mode through mount pad 2, the normal use of mirror 32 that shakes has been guaranteed.
As shown in fig. 1 and 2, a protective cover 24 is further provided on the horizontal portion 22, and the protective cover 24 is detachably fixed to the horizontal portion 22 and the convex portion 23 by a fastener such as a screw. The protective cover 24, the vertical part 21 and the convex part 23 are mutually matched to form a closed cavity, the galvanometer 32 and the reflector 62 are arranged in the closed cavity, and the protective cover 24 is used for discharging interference of other external light on the reference arm and the sample arm to ensure the quality of sample detection.
As shown in fig. 5, 6 and 7, in this embodiment, a Z-axis groove 111 whose length direction is the Z-axis direction is disposed on one side of the fixed seat 11 close to the movable seat 12, a Y-axis groove 121 whose length direction is the Y-axis direction is disposed on one side of the movable seat 12 close to the fixed seat 11, a Z-axis block 112 is disposed in the Z-axis groove 111, a Y-axis block 122 is disposed in the Y-axis groove 121, one end of the Z-axis block 112 is connected to the movable seat 12 through the first connecting member 4, a Z-axis adjusting member 13 is disposed on the other end of the Z-axis block 112, one end of the Y-axis block 122 is connected to the fixed seat 11 through the second connecting member 5, and a Y-axis adjusting member 14 is. The Z-axis block 112 can reciprocate along with the movable base 12 in the Z-axis direction, and the Y-axis block 122 also moves in the Z-axis direction; the Y-axis block 122 is movable reciprocally in the Y-axis direction with respect to the movable base 12, thereby achieving positional adjustment of the probe assembly 3 in the Y-axis and Z-axis directions. In the present embodiment, the adjustment assembly 1 is made of stainless steel material, which is used to ensure the dimensional accuracy of the adjustment.
As shown in fig. 8, 9 and 10, in the present embodiment, the Z-axis adjusting member 13 includes: a first micrometer head 131 arranged on the fixed seat 11 and a first distance adjusting block 132 arranged on the Y-axis block 122; the Y-axis adjusting member 14 includes: a second micrometer head 141 arranged on the Z-axis block 112 and a second distance adjusting block 142 arranged on the mounting base 2. The first distance adjusting block 132 is configured to cooperate with the first micrometer head 131 to determine an adjusted distance of the movable seat 12 in the Z-axis direction, and the second distance adjusting block 142 is configured to cooperate with the second micrometer head 141 to determine an adjusted distance of the movable seat 12 in the Y-axis direction. The minimum scales of the first micrometer head 131 and the second micrometer head 141 are 0.01mm, and the measuring range is 0-14 mm.
As shown in fig. 8, 9 and 10, in the present embodiment, the first connecting member 4 is provided on the upper end surfaces of the fixed seat 11 and the movable seat 12, and the second connecting member 5 is provided on the side end surfaces of the fixed seat 11 and the movable seat 12. Wherein the first connecting member 4 includes: a first connecting plate 41 and a first tightening knob 42. One end of the first connecting plate 41 is disposed on the end face of the Z-axis block 112 through a fastener such as a screw, the other end of the first connecting plate 41 covers the end face of the movable seat 12 and is provided with a Y-axis long slot 411 whose length direction is the Y-axis direction, the first tightening knob 42 penetrates through the Y-axis long slot 411 to be in threaded connection with the movable seat 12 and abuts against the first connecting plate 41, and after the first tightening knob 42 is tightened, the first connecting plate 41 is tightly abutted against the end face of the movable seat 12, so that the position of the movable seat 12 in the Y-axis direction is fixed. The second connector 5 includes: a second connecting plate 51 and a second tightening knob 52. One end of the second connecting plate 51 is arranged on the end face of the Y-axis block 122 through a fastener, the other end of the second connecting plate 51 covers the end face of the fixed seat 11 and is provided with a Z-axis long groove 511, the length direction of which is the Z-axis direction, the second tightening knob 52 penetrates through the Z-axis long groove 511 to be in threaded connection with the fixed seat 11 and abuts against the second connecting plate 51, and after the second tightening is rotated and tightened, the second connecting plate 51 is tightly abutted against the end face of the fixed seat 11, so that the position of the movable seat 12 in the Z-axis direction is fixed. The Y-axis long groove 411 and the Z-axis long groove 511 have a function of limiting an adjustment range and also have a guiding function.
The adjusting process of the OCT probe adjusting device of the present embodiment is as follows: when the position of the probe assembly 3 in the Y axis direction needs to be adjusted, the first tightening knob 42 is loosened, then the adjustment distance of the probe assembly 3 in the Y axis direction needs to be adjusted through the second micrometer head 141 of the Y axis adjusting part 14, at this time, the movable base 12 moves in the Y axis direction relative to the fixed base 11, the Z axis block 112 and the Y axis block 122, so that the light spot of the objective lens 31 is located at the highest point of the surface of the sample, then the first tightening knob 42 is tightened, and the position adjustment and fixation of the movable base 12 in the Y axis direction are realized; when the position of the probe assembly 3 in the Z-axis direction needs to be adjusted, the second tightening knob 52 is loosened, then the adjustment distance of the probe assembly 3 in the Z-axis direction needs to be adjusted through the second micrometer caliper 141 adjusted by the Z-axis, at this time, the movable seat 12 drives the Z-axis block 112 and the Y-axis block 122 to move in the Z-axis direction relative to the fixed seat 11 to obtain a maximum signal, then the second tightening knob 52 is tightened to realize the position adjustment and fixation of the movable seat 12 in the Z-axis direction, and finally, the maximum resolution of the a-scan can be obtained through the fine adjustment mode that the first micrometer caliper 131 and the second micrometer caliper 141 are mutually matched.
In this embodiment, before adjusting the reference arm, the galvanometer 32 is rotated to make the angle of the galvanometer 32 form 45 ° with the horizontal base, the position is set as 0 position, then the light spot is located at the most middle position of encapsulation of the capsule sample through the adjusting process of the Z axis and the Y axis, then the height of the collimating mirror 61 in the lens barrel 211 is adjusted through the jackscrew, so as to change the optical path of the reference arm, make the optical paths of the sample arm and the reference arm equal, while adjusting the height of the collimating mirror 61, the signal is located at a proper position by observing the data of the a-scan, and obtain good encapsulation information by observing the B-scan.
The OCT probe adjusting device provided by the embodiment of the invention improves the imaging depth of the OCT technology. In the practical application process of an industrial production line, because a capsule sample has height deviation in the transportation process, the height of the objective lens 31 in the Z-axis direction is adjusted through the adjusting assembly 1, so that a light spot focus is converged on the surface of the capsule, the position of the objective lens 31 in the Y-axis direction is adjusted through the adjusting assembly 1, so that the transverse position of the light spot is adjusted, a clear B-scan image is obtained at the transverse section of the highest point position of the vibrating mirror 32 in the process of scanning the capsule for subsequent processing, and the imaging depth is increased through the adjusting assembly 1, so that the whole encapsulation imaging can be realized only by a single OCT (optical coherence tomography) technical system, and meanwhile, the OCT probe adjusting device does not need to increase the hardware of the OCT technical system and does not reduce the imaging speed of the system.
The OCT probe adjusting device provided by the embodiment of the invention changes the optical path difference by adjusting the collimating mirror 61, solves the problems of signal attenuation and limited transverse scanning range caused by a fraction device, and optimizes the transverse resolution, scanning range and signal-to-noise ratio of an imaging channel by integrally arranging the sample arm and the mounting seat 2. Meanwhile, the OCT probe adjusting device can qualitatively and quantitatively analyze the encapsulation thickness of the capsule, so that the OCT probe adjusting device has good repeatability and accuracy in the process of measuring the encapsulation condition of the capsule, and has the advantage of stable imaging measurement in the aspect of industrial quality detection.
According to the OCT probe adjusting device provided by the embodiment of the invention, the capsule encapsulation is detected by using the OCT technology, a stable two-dimensional OCT sectional image and a longitudinal signal diagram can be obtained in an experiment, the layered structure of the section of the capsule can be clearly observed, the morphological inspection of the capsule encapsulation can be realized, and the quality of a capsule finished product is ensured.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. An OCT probe adjustment device, comprising: the device comprises an adjusting assembly, a mounting seat and a probe assembly; the adjustment assembly includes: the movable seat is movably arranged on the fixed seat, the Z-axis adjusting piece is used for adjusting the position of the movable seat in the Z-axis direction of the fixed seat, and the Y-axis adjusting piece is used for adjusting the position of the movable seat in the Y-axis direction of the fixed seat; the mounting seat is installed on the movable seat, and the probe assembly is arranged on the mounting seat.
2. The OCT probe adjustment device of claim 1, wherein: the fixing base is close to one side of sliding seat is equipped with Z axle recess, the sliding seat is close to one side of fixing base is equipped with Y axle recess, be equipped with Z axle piece in the Z axle recess, be equipped with Y axle piece in the Y axle recess, the one end of Z axle piece pass through first connecting piece with the sliding seat is connected, the other end of Z axle piece is equipped with Z axle regulating part, the one end of Y axle piece pass through the second connecting piece with the fixing base is connected, the other end of Y axle piece is equipped with Y axle regulating part.
3. The OCT probe adjustment device of claim 2, wherein: the Z-axis adjusting member includes: the first micrometer head is arranged on the fixed seat, and the first distance adjusting block is arranged on the Y-axis block; the Y-axis adjusting member includes: the second micrometer head is arranged on the Z-axis block, and the second distance adjusting block is arranged on the mounting seat.
4. The OCT probe adjustment device of claim 2, wherein: the first connecting member includes: a first connecting plate and a first tightening knob; one end of the first connecting plate is arranged on the end face of the Z-axis block through a fastener, the other end of the first connecting plate covers the end face of the movable seat and is provided with a Y-axis long groove, and the first tightening knob penetrates through the Y-axis long groove to be in threaded connection with the movable seat and abuts against the first connecting plate; the second connector includes: one end of the second connecting plate is arranged on the end face of the Y-axis block through a fastener, the other end of the second connecting plate covers the end face of the fixing seat and is provided with a Z-axis long groove, and the second tightening knob penetrates through the Z-axis long groove to be in threaded connection with the fixing seat and abuts against the second connecting plate.
5. The OCT probe adjustment device of claim 1, wherein: the mount pad includes: the vertical part is connected with the movable seat through a fastener, the vertical part is further provided with an OCT assembly, and the probe assembly is arranged on the horizontal part.
6. The OCT probe adjustment device according to claim 5, characterized in that: a lens cone is arranged on one side, away from the movable seat, of the vertical part, a mounting surface is arranged below the lens cone, and the OCT component comprises: locate the collimating mirror in the lens cone with locate reflector on the installation face, probe subassembly includes: locate objective on the horizontal part to and rotate and locate the mirror that shakes above the objective, objective with the light of collimating mirror is vertical to be set up, shake the mirror with the surface of speculum is 45 settings with the horizontal basal plane.
7. The OCT probe adjustment device of claim 6, wherein: the vertical portion and the horizontal portion are integrally formed.
8. The OCT probe adjustment device of claim 6, wherein: the periphery of the lens barrel is provided with a plurality of threaded holes at intervals along the axial direction, and the threaded holes are screwed with jackscrews which can be abutted against the collimating lens.
9. The OCT probe adjustment device of any one of claims 6-8, wherein: the vibrating mirror is characterized in that a convex part is arranged on the horizontal part, a mounting groove and a deformation groove communicated with the mounting groove are formed in the convex part, the vibrating mirror is arranged in the mounting groove, and a screw penetrating through the deformation groove to clamp the vibrating mirror is arranged on the convex part.
10. The OCT probe of claim 9, wherein the horizontal portion has a shield, the vertical portion and the protrusion cooperate to form a closed cavity, and the galvanometer and the mirror are disposed within the closed cavity.
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| CN201911155362.7A CN110906869A (en) | 2019-11-22 | 2019-11-22 | OCT probe adjusting device |
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| CN201911155362.7A CN110906869A (en) | 2019-11-22 | 2019-11-22 | OCT probe adjusting device |
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