CN110376700B - Light path adjusting mechanism based on digital micromirror unit and adjusting method thereof - Google Patents
Light path adjusting mechanism based on digital micromirror unit and adjusting method thereof Download PDFInfo
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- CN110376700B CN110376700B CN201910712289.2A CN201910712289A CN110376700B CN 110376700 B CN110376700 B CN 110376700B CN 201910712289 A CN201910712289 A CN 201910712289A CN 110376700 B CN110376700 B CN 110376700B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 87
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000013307 optical fiber Substances 0.000 claims abstract description 58
- 230000003287 optical effect Effects 0.000 claims description 35
- 238000003825 pressing Methods 0.000 claims description 12
- 230000000007 visual effect Effects 0.000 claims description 2
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- 230000008569 process Effects 0.000 abstract description 9
- 238000013461 design Methods 0.000 abstract description 4
- 238000012958 reprocessing Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 7
- 238000012546 transfer Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 238000013459 approach Methods 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000000701 chemical imaging Methods 0.000 description 1
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- 230000008878 coupling Effects 0.000 description 1
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- 238000007405 data analysis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/023—Mountings, adjusting means, or light-tight connections, for optical elements for lenses permitting adjustment
Abstract
The invention relates to a light path adjusting mechanism based on a digital micro mirror unit and an adjusting method thereof, wherein the light path adjusting mechanism comprises: the digital micromirror unit adjusting mechanism is arranged at the rear side of the main body beam splitting part; the light receiving main body adjusting mechanism is arranged at the front side of the main body light splitting piece; and the optical fiber switching fixing piece adjusting mechanism is arranged at the front end of the light receiving main body. The light path adjusting mechanism and the adjusting method thereof can carry out omnibearing adjustment on the reflection angle, the light receiving angle, the position and the coaxial condition of multiple components of the light spot through various combination adjustment, thereby avoiding the work of changing design or reprocessing structural members when installing digital micromirror units of different batches, reducing the workload of the debugging process, saving time and cost, avoiding errors observed by human eyes by means of equipment debugging, and ensuring the light receiving accuracy.
Description
Technical Field
The invention relates to the technical field of optical instruments, in particular to an optical path adjusting mechanism based on a digital micro-mirror unit and an adjusting method thereof.
Background
In the light modulation and collection process, the light path angle and the position change can cause the loss of the finally collected light spot part due to some errors in the machining and installation of the mechanical structure and the components, thereby causing great difficulty in accurately collecting the light information. The modulation components and the structural parts are adopted for one-to-one correction, the process is repeated, the workload is large, the period is long, and great difficulty is brought to the debugging process, so that an angle and coaxial adjustable mechanism is designed for light modulation and collection aiming at the problem, and the requirement of complete collection of light spots is met. Meanwhile, the adjusting method adopted by the mechanism introduces the detecting equipment, and avoids the defect that the index numerical value is difficult to define by naked eye observation.
The method for obtaining the target information by utilizing the digital micro-mirror unit to carry out light modulation is widely and widely applied, particularly in imaging equipment, the method for generating the high-resolution target image by adopting the digital micro-mirror unit to carry out light modulation, collecting and detecting through an optical system and combining a compressed sensing algorithm has wide research in the directions of single-pixel cameras, spectral imaging and the like. The equipment has great demands in the fields of biomedicine, environmental monitoring, homeland security and the like.
Patent 201810430721.4 and 201810318644.3, 201810008742.7 provide application schemes for digital micromirror units in imaging optics, spectrometers, etc., but the patent is mainly directed to new schemes and methods for protection, and does not relate to specific installation and optical path debugging details in production. Patent 201710576290.8 is directed to the heat dissipation application protection of the digital micromirror unit, and also does not relate to the assembly and debugging problems.
The digital micromirror unit is mostly applied to precise optical instruments, and has higher requirements on coaxiality, azimuth and the like of an optical path, but the angle deflection of the micromirror unit can have unavoidable errors, and the mechanical structure can cause unavoidable assembly errors, particularly some complex mechanical structures, so that great difficulty is caused for light modulation and collection. In order to solve the problem in the actual installation and debugging, the scheme designs a coaxial and angle adjusting mechanism of a light receiving system based on a digital micro mirror unit.
The prior art has the defects that:
in the mechanism, the digital micromirror unit specification considers that the piece has errors within +/-1 DEG, and the errors existing in different batches can be different, which increases the difficulty in matching design of the mechanical mechanism. When the current period is designed, the accurate angle of the micromirror unit needs to be measured in advance, and then the structural components are modified one by one according to the test condition, so that the process is complex, and a lot of unnecessary resources and time are wasted.
Secondly, certain errors exist in the machining and the installation of the structural member, and the errors are corrected by adopting a mode of adjusting the installation position in the actual debugging process, but under the condition that the structural member is complex, a great amount of work is increased by repeated adjustment.
Disclosure of Invention
The invention aims to solve the technical problem of providing an optical path adjusting mechanism based on a digital micro mirror unit and an adjusting method thereof.
The invention is realized by the following technical scheme:
an optical path adjustment mechanism based on a digital micromirror unit, the optical path adjustment mechanism comprising: the digital micromirror unit adjusting mechanism is arranged at the rear side of the main body beam splitting part; the light receiving main body adjusting mechanism is arranged at the front side of the main body light splitting piece; the optical fiber switching fixing piece adjusting mechanism is arranged at the front end of the light receiving main body;
the digital micromirror unit adjusting mechanism includes:
The digital micro-mirror unit is fixedly connected to a digital micro-mirror unit fixing piece, and the digital micro-mirror unit fixing piece is rotatably connected to the digital micro-mirror unit angle adjusting ring; the digital micro-mirror unit focusing surface adjusting ring is sleeved on the outer side of the digital micro-mirror unit angle adjusting ring, the digital micro-mirror unit angle adjusting ring is sleeved on the outer side of the main body light splitting piece, and the digital micro-mirror unit focusing surface adjusting ring is rotated to enable the digital micro-mirror unit angle adjusting ring to move forwards and backwards relative to the main body light splitting piece and not rotate;
The light receiving main body adjusting mechanism comprises:
The light receiving main body is fixedly connected with the adjusting main body, the adjusting main body is connected with the main body light splitting piece through an arc-shaped guide rail, and the center of the arc-shaped guide rail is the center of the digital micro mirror unit;
The optical fiber switching fixing piece adjusting mechanism comprises:
The focusing surface adjusting ring is sleeved on the outer side of the focusing fixed inner ring, the focusing fixed inner ring is sleeved on the outer side of the light receiving main body, and the focusing surface adjusting ring is rotated to enable the focusing fixed inner ring to move forwards and backwards relative to the light receiving main body and not to rotate; the optical fiber switching fixing piece is arranged at the tail end of the focusing fixing inner ring and is fixed by a pressing ring.
Further, in the optical path adjusting mechanism based on the digital micro-mirror unit, a first hole is formed in the side wall of the focusing surface adjusting ring of the digital micro-mirror unit, and a first groove is formed in the inner side of the side wall of the focusing surface adjusting ring of the digital micro-mirror unit along the circumferential direction through the first hole; the main body beam splitter is provided with a circular bulge, and the side wall of the circular bulge is provided with a first threaded hole; the digital micromirror unit angle adjusting ring is provided with a circular bulge, and a first strip hole is formed in the side wall of the circular bulge along the axial direction; the digital micromirror unit focus surface adjusting ring is in threaded sleeve joint with the outer side of the circular bulge, and the circular bulge is in sleeve joint with the outer side of the circular bulge; the screw is connected with the first threaded hole through the first hole and the first strip hole, and the nut of the screw penetrates through the first hole and is embedded into the first groove.
Further, the optical path adjusting mechanism based on the digital micro mirror unit, wherein the digital micro mirror unit fixing piece comprises a digital micro mirror unit connecting part and a rotating connecting part connected with the digital micro mirror unit connecting part; the digital micro-mirror unit connecting part is connected with the digital micro-mirror unit, and the rotating connecting part is sleeved in the digital micro-mirror unit angle adjusting ring and connected with the pressing sheet by a screw; the two sides of the rotating connecting part are provided with openings, the two sides of the digital micro-mirror unit angle adjusting ring are provided with second threaded holes corresponding to the two sides of the digital micro-mirror unit angle adjusting ring, the digital micro-mirror unit angle adjusting screw rod extends into the openings through the second threaded holes, and the digital micro-mirror unit fixing piece is enabled to rotate slightly through telescopic adjustment of the digital micro-mirror unit angle adjusting screw rod, so that the angle of the digital micro-mirror unit is adjusted.
Further, the optical path adjusting mechanism based on the digital micro mirror unit, the adjusting main body comprises an upper cover plate, a lower cover plate, an outer side plate, an inner side plate and a front plate, the upper cover plate, the inner side plate, the lower cover plate and the outer side plate are connected in sequence end to end and are all connected to the front plate, and the light receiving main body is connected to the front plate; the upper cover plate and the lower cover plate are respectively provided with an upper arc-shaped guide rail and a lower arc-shaped guide rail, and the upper side and the lower side of the main body light splitting piece are respectively provided with an upper arc-shaped guide rail groove and a lower arc-shaped guide rail groove which are connected with the upper arc-shaped guide rail and the lower arc-shaped guide rail in a matched manner; a third strip hole is axially formed in the outer side plate, a third threaded hole is formed in a corresponding position of the main body light splitting piece, and an angle adjusting screw is screwed in and out of the third threaded hole through the third strip hole to adjust the angle of the light receiving main body relative to the central line of the digital micro mirror unit; the outer side plate and the inner side plate are respectively provided with a plurality of third holes, and a plurality of angle fixing jackscrews are respectively screwed into a plurality of third holes to be abutted against the main body light splitting piece so as to fix the light receiving main body.
Further, in the optical path adjusting mechanism based on the digital micro mirror unit, a fourth hole is formed in the side wall of the focusing surface adjusting ring, and four grooves are formed in the inner side of the side wall of the focusing surface adjusting ring along the periphery Xiang Kaidi through the fourth hole; the side wall of the light receiving main body is provided with a fourth threaded hole, and the side wall of the focusing fixed inner ring is provided with a fourth strip hole along the axial direction; the focusing surface adjusting ring is in threaded sleeve joint with the outer side of the focusing fixing inner ring, the focusing fixing inner ring is in sleeve joint with the outer side of the light receiving main body, the focusing fixing screw is connected with the fourth threaded hole through the fourth hole and the fourth long strip hole, and a nut of the focusing fixing screw penetrates through the fourth hole and is embedded into the fourth groove.
Further, in the optical path adjusting mechanism based on the digital micromirror unit, the inner diameter of the tail end of the focusing fixing inner ring is larger than the outer diameter of the optical fiber switching fixing piece, and at least 3 jackscrews are uniformly distributed in the circumferential direction of the pressing ring to fix the optical fiber switching fixing piece.
Further, in the light path adjusting mechanism based on the digital micro mirror unit, the number of the jackscrews is 4.
An adjustment method using the optical path adjustment mechanism comprises the following steps:
(1) Adjusting the digital micromirror unit; on the premise that the light receiving main body and the structural parts thereof are not installed, the digital micro-mirror unit is assembled on the digital micro-mirror unit fixing piece, so that the digital micro-mirror unit is visually observed to be about 45 degrees with the vertical direction, then an incident light source is started, and the incident light is modulated by the digital micro-mirror unit and then reflected to two sides; repeatedly screwing in and screwing out two digital micromirror unit angle adjusting screws to adjust the angle of the digital micromirror unit relative to the vertical direction; rotating a focus plane adjusting ring of the digital micro-mirror unit to adjust the front and back positions of the digital micro-mirror unit relative to the main body light splitting piece; until clear and bright light spots can be observed at the light outlets at the two sides, the positions of the light spots are centered up and down, the angle adjusting screws of the two digital micro-mirror units are screwed down to lock, and the focusing surface adjusting ring of the digital micro-mirror units is fixed;
(2) Adjusting a light receiving main body; the light receiving main body and the structural members thereof are installed, the angle adjusting screws at the two sides are respectively screwed in and out to adjust the angle of the light receiving main body relative to the incident light, the visual observation light spots are stopped after being centered in the round hole at the tail end of the light receiving main body, and the jackscrews are fixed by the angle for locking;
(3) Adjusting the optical fiber switching fixing piece; installing an optical fiber switching fixing piece and connecting a detector and a counting system; the focusing surface adjusting ring is rotated to adjust the front and back positions of the optical fiber switching fixing piece relative to the light receiving main body, and meanwhile, the optical fiber inputs detected light into the detector, feeds back the detected light to the counting system in real time, and records the counting value; when the digital maximum value displayed by the counting system is found, the position of the focus plane adjusting ring is fixed, and the front and back positions of the optical fiber switching fixing piece relative to the light receiving main body are determined; and then adjusting other position relations of the optical fiber switching fixing piece relative to the light receiving main body except front and back, when the digital maximum value displayed by the counting system is found, locking a plurality of jackscrews to fix the optical fiber switching fixing piece relative to the light receiving main body, and completing the adjustment of the optical path adjusting mechanism.
The invention has the advantages and effects that:
1. The optical path adjusting mechanism provided by the invention comprises the digital micro-mirror unit adjusting mechanism, the front-back position and the angle relation of the digital micro-mirror unit relative to the main body beam splitter can be adjusted, errors and installation errors existing in the digital micro-mirror unit can be corrected, the work of previous measurement and repeated modification of structural parts is reduced, the repeated assembly process of the digital micro-mirror unit is avoided, and the debugging process is simplified.
2. The light path adjusting mechanism provided by the invention comprises the light receiving main body adjusting mechanisms, wherein the angles of incident light entering the light path adjusting mechanisms from the two sides of the light receiving main bodies can be respectively adjusted, repeated installation is avoided, the adjustment of the light receiving main bodies at the two sides is mutually noninterfere, and independent adjustment is carried out so as to adapt to the condition of inconsistent assembly errors of structural members.
3. The optical path adjusting mechanism provided by the invention comprises the optical fiber switching fixing piece, the position relation of the optical fiber switching fixing piece relative to the light receiving main body can be adjusted, the light spots are coupled into the optical fibers, and the complete light spots can be collected through multi-dimensional adjustment.
4. The adjusting method using the light path adjusting mechanism provided by the invention can carry out all-round adjustment on the reflection angle, the light receiving angle, the position and the coaxial condition of multiple components of the light spot through various combination adjustment, avoids the work of changing designs or reprocessing structural parts when different batches of digital micromirror units are installed, reduces the workload of the debugging process, saves time and cost, and simultaneously avoids errors observed by human eyes by means of equipment debugging and ensures the accuracy of light receiving.
Drawings
Fig. 1 shows a schematic structural diagram of an optical path adjusting mechanism provided by the invention;
FIG. 2 shows a cross-sectional view of FIG. 1;
FIG. 3 shows a cross-sectional view taken along line A-A of FIG. 1;
FIG. 4 shows a left side view of FIG. 1;
FIG. 5 shows a cross-sectional view of FIG. 4;
fig. 6 is a schematic view showing a structure of a focus plane adjusting ring of the optical path adjusting mechanism provided by the present invention;
fig. 7 shows an application schematic of the optical path adjusting mechanism provided by the invention.
Reference numerals illustrate: 10-digital micro mirror unit, 11-digital micro mirror unit fixing piece, 111-digital micro mirror unit connecting part, 112-rotation connecting part, 113-pressing piece, 114-opening, 12-digital micro mirror unit angle adjusting ring, 121-circular ring-shaped bulge, 122-first strip hole, 13-digital micro mirror unit focus plane adjusting ring, 131-first hole, 132-first groove, 14-digital micro mirror unit angle adjusting screw, 141-second screw hole, 15-screw, 20-main body light splitting piece, 21-circular bulge, 22-first screw hole, 23-upper arc guide rail groove, 24-lower arc guide rail groove, 25-third screw hole, 30-light receiving main body, 31-fourth screw hole 40-adjusting body, 401-upper cover plate, 402-lower cover plate, 403-outer plate, 404-inner plate, 405-front plate, 41-upper arc guide, 42-lower arc guide, 43-third elongated hole, 44-angle adjusting screw, 45-third hole, 46-angle fixing jackscrew, 50-focus face adjusting ring, 501-fourth hole, 502-fourth groove, 51-focus fixing inner ring, 511-fourth elongated hole, 52-focus fixing screw, 60-optical fiber switching fixture, 61-pressing ring, 62-jackscrew, 70-optical path adjusting mechanism, 71-bracket, 72-standard table, 73-mirror assembly, 74-microscope objective, 75-detector, 76-counting system.
Detailed Description
In order to make the purposes, technical solutions and advantages of the implementation of the present invention more clear, the technical solutions in the embodiments of the present invention are described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. The described embodiments are some, but not all, embodiments of the invention. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention. Embodiments of the present invention will be described in detail below with reference to the attached drawings:
In the description of the present invention, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present invention.
Fig. 1 shows a schematic structure of an optical path adjusting mechanism provided by the present invention. The optical path adjusting mechanism comprises a digital micro-mirror unit adjusting mechanism, a light receiving main body adjusting mechanism and an optical fiber switching fixing piece adjusting mechanism, wherein the digital micro-mirror unit adjusting mechanism is arranged at the rear side of the main body light splitting piece 20, the optical fiber switching fixing piece adjusting mechanism is arranged at the front end of the light receiving main body 30, and the light receiving main body adjusting mechanism is arranged between the main body light splitting piece 20 and the light receiving main body 30.
As shown in fig. 2, the digital micromirror unit adjustment mechanism includes a digital micromirror unit 10, a digital micromirror unit holder 11, a digital micromirror unit angle adjustment ring 12, and a digital micromirror unit focus plane adjustment ring 13. The digital micro-mirror unit adjusting mechanism comprises a digital micro-mirror unit front-back adjusting mechanism and a digital micro-mirror unit angle adjusting mechanism, and adjusts the position of the digital micro-mirror unit 10 in a mode of front-back movement and micro-rotation so as to achieve the focusing purpose. The digital micromirror unit 10 is fixedly coupled to a digital micromirror unit fixing member 11, and the digital micromirror unit fixing member 11 is rotatably coupled to a digital micromirror unit angle adjusting ring 12. The digital micromirror unit focus adjusting ring 13 is sleeved on the outer side of the digital micromirror unit angle adjusting ring 12, the digital micromirror unit angle adjusting ring 12 is sleeved on the outer side of the main body light splitting piece 20, and the digital micromirror unit focus adjusting ring 13 is rotated to enable the digital micromirror unit angle adjusting ring 12 to move back and forth relative to the main body light splitting piece 20 and not rotate.
Wherein the front-back adjusting mechanism of the digital micro mirror unit is specifically. The side wall of the digital micro-mirror unit focus surface adjusting ring 13 is provided with a first hole 131, and the inner side of the side wall of the digital micro-mirror unit focus surface adjusting ring 13 is provided with a first groove 132 along the circumferential direction through the first hole 131. The body light splitting member 20 has a circular protrusion 21, and a first threaded hole 22 is formed in a sidewall of the circular protrusion 21. The digital micromirror unit angle adjusting ring 12 has a circular protrusion 121, the inner diameter of the circular protrusion 121 is larger than the outer diameter of the circular protrusion 21, the outer diameter thereof is smaller than the inner diameter of the digital micromirror unit focus plane adjusting ring 13, and the side wall of the circular protrusion 121 is provided with a first elongated hole 122 along the axial direction. The digital micro mirror unit focus plane adjusting ring 13 is in threaded sleeve joint with the outer side of the annular bulge 121, and the annular bulge 121 is in sleeve joint with the outer side of the annular bulge 21. The screw 15 is connected to the first threaded hole 22 via the first hole 131 and the first elongated hole 122, and the nut of the screw 15 is inserted into the first recess 132 through the first hole 131. Because the nuts of the screws 15 are embedded in the first grooves 132, the digital micromirror unit focus plane adjusting ring 13 can only rotate and can not move back and forth relative to the main body light splitting piece 20; the angle adjusting ring 12 of the digital micromirror unit is provided with the axial first elongated hole 122, so that the angle adjusting ring can only move back and forth and can not rotate relative to the main body light splitting member 20; the digital micro-mirror unit focusing surface adjusting ring 13 is rotated, and the digital micro-mirror unit focusing surface adjusting ring 13 is in threaded connection with the digital micro-mirror unit angle adjusting ring 12, so that the digital micro-mirror unit angle adjusting ring 12 drives the digital micro-mirror unit 10 to move back and forth relative to the main body light splitting piece 20. The maximum range of the back and forth movement of the dmd unit 10 relative to the main body beam splitter 20 is the length of the first elongated hole 122.
Wherein, as shown in fig. 3, the digital micromirror unit angle adjusting mechanism is specifically. The digital micromirror unit fixing piece 11 includes a digital micromirror unit connecting portion 111 and a rotational connecting portion 112, and the digital micromirror unit connecting portion 111 is integrally connected to the rotational connecting portion 112. The digital micro mirror unit 10 is fixedly connected with the digital micro mirror unit connecting part 111, the rotating connecting part 112 is sleeved in the digital micro mirror unit angle adjusting ring 12 and is connected with the pressing piece 113 by a screw, so that the digital micro mirror unit fixing piece 11 can rotate relative to the digital micro mirror unit angle adjusting ring 12 and can not move back and forth. Two sides of the rotary connecting portion 112 are respectively provided with a notch 114, and the notch 114 is in an open right angle and extends to the outside of the rotary connecting portion 112. The two side walls of the digital micro-mirror unit angle adjusting ring 12 are respectively provided with a second threaded hole 141 corresponding to the two openings 114, the digital micro-mirror unit angle adjusting screw 14 extends into the openings 114 through the second threaded holes 141, and the digital micro-mirror unit fixing piece 11 is micro-rotated by the telescopic adjustment of the two digital micro-mirror unit angle adjusting screws 14 so as to adjust the angle of the digital micro-mirror unit 10. Specifically, when the angle adjusting screws 14 of the two digital micromirror units are both abutted against the inner wall of the notch 114, the rotation connecting portion 112 is locked, i.e. the digital micromirror unit 10 is fixed relative to the main body light splitting member 20. When at least one digital micromirror unit angle adjusting screw 14 is far away from the inner wall of the opening 114, the digital micromirror unit angle adjusting screw 14 in the required rotation direction can be screwed into the inner wall of the opening 114 according to the actual situation, the opposite digital micromirror unit angle adjusting screw 14 is unscrewed, and the rotation connection part 112 is pushed to drive the digital micromirror unit 10 to rotate slightly. The angle adjustment of the digital micromirror unit can be realized by repeatedly screwing in and unscrewing out the two digital micromirror unit angle adjustment screws 14. The size of the opening 114 is set according to the required angle adjustment, which is preferably + -5 deg..
As shown in fig. 4 and 5, the light-receiving main body adjusting mechanism has a bilateral symmetry structure, and comprises a light-receiving main body 30 and an adjusting main body 40, and the two sides of the light-receiving main body 30 can be independently adjusted in angle so as to adapt to the situation of inconsistent assembly errors of structural members. The light receiving main body 30 is fixedly connected to the adjusting main body 40, and the adjusting main body 40 is connected with the main body light splitting piece 20 through an arc-shaped guide rail so as to realize the angle adjustment of the light receiving main body 30 relative to the main body light splitting piece 20. The center of the arc-shaped guide rail is the installation center of the digital micro mirror unit 10.
Specifically, the adjusting body 40 includes an upper cover 401, a lower cover 402, an outer cover 403, an inner cover 404 and a front plate 405, where the upper cover 401, the inner cover 404, the lower cover 402 and the outer cover 403 are connected end to end in sequence to form a cuboid and are all connected to one side of the front plate 405, and the light receiving body 30 is connected to the other side of the front plate 405. The upper cover plate 401 and the lower cover plate 402 are respectively provided with an upper arc-shaped guide rail 41 and a lower arc-shaped guide rail 42, and the upper side and the lower side of the front end of the main body light splitting member 20 are respectively provided with an upper arc-shaped guide rail groove 23 and a lower arc-shaped guide rail groove 24 which are in fit connection with the upper arc-shaped guide rail 41 and the lower arc-shaped guide rail 42. The light receiving main body 30 performs a circular motion along with the adjusting main body 40 along the upper and lower arc-shaped guide rail grooves to realize an angle adjustment of the light receiving main bodies 30 at both sides with respect to the center line of the digital micromirror unit 10 (incident light entering the light path adjusting mechanism). The outer plate 403 is axially provided with a third elongated hole 43, a third threaded hole 25 is provided at a corresponding position of the main body light splitting member 20, and an angle adjusting screw 44 is screwed into and out of the third threaded hole 25 through the third elongated hole 43 to adjust an angle of the light receiving main body 30 relative to a center line of the digital micromirror unit 10. The outer plate 403 and the inner plate 404 are respectively provided with a plurality of third holes 45, and the plurality of angle fixing jackscrews 46 are respectively screwed into the plurality of third holes 45 to be abutted against the main body light splitting piece 20 so as to fix the light receiving main body 30. Specifically, according to actual needs, the angle adjusting screw 44 is screwed in or out to drive the adjusting body 40 to approach or separate from the center line of the digital micromirror unit 10 along the upper and lower arc-shaped guide rail grooves, and after the expectation is reached, the angle fixing jackscrews 46 are screwed in on both sides and abutted against both sides of the body light splitting member 20, that is, the light receiving body 30 is fixed relative to the body light splitting member 20.
As shown in fig. 5 and 6, the optical fiber switching fixture adjustment mechanism includes an optical fiber switching fixture 60, a focus plane adjustment ring 50, a focus fixing inner ring 51, and a pressing ring 61. The optical fiber switching fixing piece adjusting mechanism comprises an optical fiber switching fixing piece front-back adjusting mechanism and an optical fiber switching fixing piece position adjusting mechanism, and the position of the optical fiber switching fixing piece 60 is adjusted in a mode of front-back movement, rotation and position movement, so that the focusing purpose is achieved. The focusing surface adjusting ring 50 is sleeved on the outer side of the focusing fixed inner ring 51, the focusing fixed inner ring 51 is sleeved on the outer side of the front end of the light receiving main body 30, and the focusing surface adjusting ring 50 is rotated to enable the focusing fixed inner ring 51 to move forwards and backwards relative to the light receiving main body 30 and not to rotate. The optical fiber switching fixture 60 is fitted into the end of the focus mount inner ring 51 and is fixed by a press ring 61.
Wherein, the front-back adjusting mechanism of the optical fiber switching fixing piece is specifically. A fourth hole 501 is formed in the side wall of the focusing surface adjusting ring 50, and a fourth groove 502 is formed in the inner side of the side wall of the focusing surface adjusting ring 50 along the circumferential direction through the fourth hole 501. The side wall of the light receiving main body 30 is provided with a fourth threaded hole 31, and the side wall of the focusing fixing inner ring 51 is provided with a fourth strip hole 511 along the axial direction. The focusing surface adjusting ring 50 is in threaded sleeve connection with the outer side of the focusing fixing inner ring 51, the focusing fixing inner ring 51 is in sleeve connection with the outer side of the light receiving main body 30, the focusing fixing screw 52 is connected with the fourth threaded hole 31 through the fourth hole 501 and the fourth strip hole 511, and a nut of the focusing fixing screw 52 penetrates through the fourth hole 501 and is embedded into the fourth groove 502. Because the nut of the focus fixing screw 52 is embedded in the fourth groove 502, the focus plane adjusting ring 50 can only rotate and can not move back and forth relative to the light receiving main body 30; the focusing fixing inner ring 51 is provided with an axial fourth elongated hole 511, and can only move forward and backward relative to the light receiving main body 30 and cannot rotate; the rotary focus plane adjusting ring 50 is in threaded connection with the focus fixing inner ring 51, so that the focus fixing inner ring 51 drives the optical fiber switching fixing piece 60 to move back and forth relative to the light receiving main body 30. The maximum range of forward and backward movement of the optical fiber transfer fixing member 60 relative to the light receiving body 30 is the length of the fourth elongated hole 511.
The optical fiber switching fixing piece position adjusting mechanism is specifically. The inner diameter of the end of the focusing fixing inner ring 51 is larger than the outer diameter of the optical fiber transfer fixing member 60, and at least 3 jackscrews 62 are uniformly distributed in the circumferential direction of the pressing ring 61 to fix the optical fiber transfer fixing member 60. Specifically, after the optical fiber adapting fixing member 60 is installed in the end of the focusing fixing inner ring 51 and the front and rear positions thereof are fixed by the pressing ring 61, the optical fiber adapting fixing member 60 is moved up, down, left, right or rotated to the desired position relative to the focusing fixing inner ring 51 according to actual needs, and then a plurality of jackscrews 62 are screwed in sequence to abut against the side surface of the optical fiber adapting fixing member 60, i.e. the optical fiber adapting fixing member 60 is fixed relative to the focusing fixing inner ring 51. Preferably, the number of jackscrews 62 is 4.
Fig. 7 shows an application schematic of the optical path adjusting mechanism provided by the invention. The light path adjusting mechanism 70 and the mirror assembly 73 are arranged on the bracket 71, the microscope objective 74 is arranged below the mirror assembly 73, the specimen stage 72 is arranged below the microscope objective 74, the optical fiber transfer fixing member 60 is connected to the detector 75 through optical fibers, and the detector 75 is connected to the counting system 76. The sample to be measured is placed on the sample table 72, fluorescence emitted by the sample is collimated by the microscope objective 74 and reflected by the reflecting mirror assembly 73, enters the optical path adjusting mechanism 70 to receive light, the collected light is guided into the detector 75, and the light and the electric signal are synchronously input into the counting system 76, so that data analysis is completed. After fluorescence is emitted from the specimen, the fluorescence is upwards transmitted through the microscope objective, reflected by the reflector component and enters the light path adjusting mechanism, an arrow in fig. 1 shows the light path after the light enters the light path adjusting mechanism, the light is modulated in the light path adjusting mechanism through the digital micromirror unit, the modulated light is coupled to the optical fiber through the left and right light receiving and coupling systems, finally enters the detector, and the optical signal is converted into an electric signal and is output to the counting system.
The adjustment method using the optical path adjustment mechanism is as follows:
1. And adjusting the digital micro mirror unit. On the premise that the light receiving main body 30 and structural members thereof are not mounted, the digital micro-mirror unit 10 is assembled on the digital micro-mirror unit fixing member 11, so that the digital micro-mirror unit 10 is visually inspected to be about 45 degrees with respect to the vertical direction, then an incident light source is started, and light is modulated by the digital micro-mirror unit and reflected to two sides. The angle adjusting screw 14 of the two digital micro mirror units is repeatedly screwed in and out to adjust the angle of the digital micro mirror units; rotating the focusing surface adjusting ring 13 of the digital micromirror unit to adjust the front and rear positions of the digital micromirror unit relative to the main body light splitting piece 20; until clear and bright light spots can be observed at the light outlets at the two sides, the positions of the light spots are centered up and down, the angle adjusting screws 14 of the two digital micro-mirror units are screwed down to lock, and the focusing surface adjusting ring 13 of the digital micro-mirror units is fixed.
2. And adjusting the light receiving main body. The light receiving main body 30 and the structural members thereof are installed, the angle adjusting screws 44 at the two sides are respectively screwed in and screwed out to adjust the angle of the light receiving main body 30 relative to the incident light entering the light path adjusting mechanism, the visual inspection light spots stop after being centered in the round hole at the tail end of the light receiving main body 30, and the angle fixing jackscrews 46 are locked.
3. And adjusting the optical fiber switching fixing piece. Installing an optical fiber switching fixing piece, and connecting the detector and the counting system; the focus plane adjusting ring 50 is rotated to adjust the front and rear positions of the optical fiber switching fixing member 60 relative to the light receiving main body 30, and at the same time, the optical fiber inputs the detected light into the detector, and feeds back the detected light to the counting system in real time to record the count value. When the digital maximum value displayed by the counting system is found, the position of the focus plane adjusting ring 50 is fixed, and the front and rear positions of the optical fiber switching fixing piece 60 relative to the light receiving main body 30 are determined; and then the position relation of the optical fiber switching fixing piece 60 relative to the light receiving main body 30 is adjusted, and when the digital maximum value displayed by the counting system is found, the optical fiber switching fixing piece 60 is fixed relative to the light receiving main body 30 by locking a plurality of jackscrews 62. The light path adjusting mechanism is adjusted.
The above embodiments are only for illustrating the technical solution of the present invention, and are not intended to limit the implementation scope of the present invention. All equivalent changes and modifications within the scope of the present invention should be considered as falling within the scope of the present invention.
Claims (5)
1. An optical path adjusting mechanism based on a digital micromirror unit, characterized in that the optical path adjusting mechanism comprises: a digital micromirror unit adjusting mechanism arranged at the rear side of the main body beam splitter (20); a light receiving main body adjusting mechanism arranged at the front side of the main body light splitting piece (20); and an optical fiber switching fixing piece adjusting mechanism arranged at the front end of the light receiving main body (30);
the digital micromirror unit adjusting mechanism includes:
The digital micro mirror unit (10) is fixedly connected to the digital micro mirror unit fixing piece (11), and the digital micro mirror unit fixing piece (11) is rotatably connected to the digital micro mirror unit angle adjusting ring (12); the digital micro-mirror unit focusing surface adjusting ring (13) is sleeved on the outer side of the digital micro-mirror unit angle adjusting ring (12), the digital micro-mirror unit angle adjusting ring (12) is sleeved on the outer side of the main body light splitting piece (20), and the digital micro-mirror unit focusing surface adjusting ring (13) is rotated to enable the digital micro-mirror unit angle adjusting ring (12) to move forwards and backwards relative to the main body light splitting piece (20) and not to rotate;
The light receiving main body adjusting mechanism comprises:
The light receiving main body (30) is fixedly connected with the adjusting main body (40), the adjusting main body (40) is connected with the main body light splitting piece (20) through an arc-shaped guide rail, and the circle center of the arc-shaped guide rail is the center of the digital micro mirror unit (10);
The optical fiber switching fixing piece adjusting mechanism comprises:
The focusing surface adjusting ring (50) is sleeved on the outer side of the focusing fixed inner ring (51), the focusing fixed inner ring (51) is sleeved on the outer side of the light receiving main body (30), and the focusing surface adjusting ring (50) is rotated to enable the focusing fixed inner ring (51) to move forwards and backwards relative to the light receiving main body (30) and not to rotate; the optical fiber switching fixing piece (60) is arranged at the tail end of the focusing fixing inner ring (51) and is fixed by a pressing ring (61);
A first hole (131) is formed in the side wall of the digital micro-mirror unit focus plane adjusting ring (13), and a groove (132) is formed in the inner side of the side wall of the digital micro-mirror unit focus plane adjusting ring (13) along the periphery Xiang Kaidi through the first hole (131); the main body beam splitter (20) is provided with a circular bulge (21), and a first threaded hole (22) is formed in the side wall of the circular bulge (21); the digital micromirror unit angle adjusting ring (12) is provided with a circular bulge (121), and a first strip hole (122) is formed in the side wall of the circular bulge (121) along the axial direction; the digital micro mirror unit focus plane adjusting ring (13) is in threaded sleeve joint with the outer side of the circular bulge (121), and the circular bulge (121) is in sleeve joint with the outer side of the circular bulge (21); a screw (15) is connected with the first threaded hole (22) through the first hole (131) and the first strip hole (122), and a nut of the screw (15) passes through the first hole (131) and is embedded into the first groove (132);
The digital micromirror unit fixing piece (11) comprises a digital micromirror unit connecting part (111) and a rotating connecting part (112) connected with the digital micromirror unit connecting part (111); the digital micro-mirror unit connecting part (111) is connected with the digital micro-mirror unit (10), and the rotating connecting part (112) is sleeved in the digital micro-mirror unit angle adjusting ring (12) and connected with the pressing sheet (113) through a screw; the two sides of the rotary connecting part (112) are provided with openings (114), the two sides of the digital micro-mirror unit angle adjusting ring (12) are provided with second threaded holes (141) corresponding to each other, the digital micro-mirror unit angle adjusting screw (14) extends into the openings (114) through the second threaded holes (141), and the digital micro-mirror unit fixing piece (11) is micro-rotated by means of telescopic adjustment of the two digital micro-mirror unit angle adjusting screws (14) so as to adjust the angle of the digital micro-mirror unit (10);
The adjusting body (40) comprises an upper cover plate (401), a lower cover plate (402), an outer side plate (403), an inner side plate (404) and a front plate (405), wherein the upper cover plate (401), the inner side plate (404), the lower cover plate (402) and the outer side plate (403) are sequentially connected end to end and are all connected to the front plate (405), and the light receiving body (30) is connected to the front plate (405); the upper cover plate (401) and the lower cover plate (402) are respectively provided with an upper arc-shaped guide rail (41) and a lower arc-shaped guide rail (42), and the upper side and the lower side of the main body light splitting piece (20) are respectively provided with an upper arc-shaped guide rail groove (23) and a lower arc-shaped guide rail groove (24) which are connected with the upper arc-shaped guide rail (41) and the lower arc-shaped guide rail (42) in a matching way; a third strip hole (43) is axially formed in the outer side plate (403), a third threaded hole (25) is formed in a corresponding position of the main body light splitting piece (20), and an angle adjusting screw (44) is screwed in and out of the third threaded hole (25) through the third strip hole (43) so as to adjust the angle of the light collecting main body (30) relative to the central line of the digital micro mirror unit (10); the outer side plate (403) and the inner side plate (404) are respectively provided with a plurality of third holes (45), and a plurality of angle fixing jackscrews (46) are respectively screwed into a plurality of the third holes (45) to be abutted against the main body light splitting piece (20) so as to fix the light receiving main body (30).
2. The optical path adjusting mechanism based on the digital micromirror unit according to claim 1, wherein a fourth hole (501) is formed on the side wall of the focusing plane adjusting ring (50), and four grooves (502) are formed on the inner side of the side wall of the focusing plane adjusting ring (50) along the circumference Xiang Kaidi through the fourth hole (501); a fourth threaded hole (31) is formed in the side wall of the light receiving main body (30), and a fourth strip hole (511) is formed in the side wall of the focusing fixed inner ring (51) along the axial direction; the focusing surface adjusting ring (50) is in threaded sleeve connection with the outer side of the focusing fixing inner ring (51), the focusing fixing inner ring (51) is in sleeve connection with the outer side of the light collecting main body (30), the focusing fixing screw (52) is connected with the fourth threaded hole (31) through the fourth hole (501) and the fourth strip hole (511), and a screw cap of the focusing fixing screw (52) penetrates through the fourth hole (501) to be embedded into the fourth groove (502).
3. The optical path adjusting mechanism based on the digital micromirror unit according to claim 1, wherein the inner diameter of the end of the focusing fixing inner ring (51) is larger than the outer diameter of the optical fiber switching fixing member (60), and at least 3 jackscrews (62) are uniformly distributed in the circumferential direction of the pressing ring (61) to fix the optical fiber switching fixing member (60).
4. A digital micromirror unit based optical path adjusting mechanism according to claim 3, wherein the number of the top threads (62) is 4.
5. An adjustment method using the optical path adjustment mechanism according to any one of claims 1 to 4, characterized in that the adjustment method using the optical path adjustment mechanism is:
(1) Adjusting the digital micromirror unit; on the premise that the light receiving main body (30) and structural components thereof are not installed, the digital micro-mirror unit (10) is assembled on the digital micro-mirror unit fixing piece (11), after the digital micro-mirror unit (10) is visually detected to be about 45 degrees with the vertical direction, an incident light source is started, and the incident light is modulated by the digital micro-mirror unit and then reflected to two sides; the angle adjusting screw rods (14) of the two digital micro-mirror units are repeatedly screwed in and out to adjust the angle of the digital micro-mirror units relative to the vertical direction; rotating a focusing surface adjusting ring (13) of the digital micro-mirror unit to adjust the front and back positions of the digital micro-mirror unit relative to the main body beam splitter (20); until clear and bright light spots can be observed at the light outlets at the two sides, the positions of the light spots are centered up and down, the angle adjusting screws (14) of the two digital micro-mirror units are screwed down to lock, and the focusing surface adjusting ring (13) of the digital micro-mirror units is fixed;
(2) Adjusting a light receiving main body; the light receiving main body (30) and structural members thereof are installed, angle adjusting screws (44) at two sides are respectively screwed in and out to adjust the angle of the light receiving main body (30) relative to incident light, a visual observation light spot is stopped after being centered in a round hole at the tail end of the light receiving main body (30), and a jackscrew (46) is fixed by an angle;
(3) Adjusting the optical fiber switching fixing piece; installing an optical fiber switching fixing piece (60) and connecting the detector and the counting system; the focusing surface adjusting ring (50) is rotated to adjust the front and back positions of the optical fiber switching fixing piece (60) relative to the light receiving main body (30), and meanwhile, the optical fiber inputs the detected light into the detector, feeds back the detected light to the counting system in real time, and records the counting value; when the digital maximum value displayed by the counting system is found, the position of the focusing surface adjusting ring (50) is fixed, and the front and back positions of the optical fiber switching fixing piece (60) relative to the light receiving main body (30) are determined; and then the position relation of the optical fiber switching fixing piece (60) relative to the light receiving main body (30) is regulated, when the digital maximum value displayed by the counting system is found, a plurality of jackscrews (62) are locked to fix the optical fiber switching fixing piece (60) relative to the light receiving main body (30), and the adjustment of the optical path adjusting mechanism is completed.
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| CN102854722A (en) * | 2011-07-01 | 2013-01-02 | 中强光电股份有限公司 | Projection apparatus and light source regulating method thereof |
| CN206489309U (en) * | 2016-09-30 | 2017-09-12 | 扬明光学股份有限公司 | Light path adjusting mechanism |
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| JP2007041529A (en) * | 2005-06-30 | 2007-02-15 | Konica Minolta Opto Inc | Method for manufacturing projection optical system and projection optical system |
| US7692841B2 (en) * | 2007-07-31 | 2010-04-06 | Texas Instruments Incorporated | System and method for regulating micromirror position |
| JP5121771B2 (en) * | 2008-09-19 | 2013-01-16 | 三菱電機株式会社 | Light source unit and image display device |
| WO2017169903A1 (en) * | 2016-03-30 | 2017-10-05 | 富士フイルム株式会社 | Projector |
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| CN102854722A (en) * | 2011-07-01 | 2013-01-02 | 中强光电股份有限公司 | Projection apparatus and light source regulating method thereof |
| CN206489309U (en) * | 2016-09-30 | 2017-09-12 | 扬明光学股份有限公司 | Light path adjusting mechanism |
| CN207424505U (en) * | 2017-11-28 | 2018-05-29 | 广景视睿科技（深圳）有限公司 | A kind of lens position adjusting apparatus and projecting apparatus |
| CN210222333U (en) * | 2019-08-02 | 2020-03-31 | 北京东方锐镭科技有限公司 | Light path adjusting mechanism based on digital micromirror unit |
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