CN210222333U - Light path adjusting mechanism based on digital micromirror unit - Google Patents
Light path adjusting mechanism based on digital micromirror unit Download PDFInfo
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- CN210222333U CN210222333U CN201921243864.0U CN201921243864U CN210222333U CN 210222333 U CN210222333 U CN 210222333U CN 201921243864 U CN201921243864 U CN 201921243864U CN 210222333 U CN210222333 U CN 210222333U
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Abstract
The utility model relates to a light path guiding mechanism based on digital micro mirror unit, this light path guiding mechanism includes: the digital micromirror unit adjusting mechanism is arranged at the rear side of the main body light splitting piece; the light receiving main body adjusting mechanism is arranged on 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 can adjust the light spot reflection angle, the light receiving angle, the position and the coaxial condition of multiple parts in all directions through various combination adjustment, avoids the work that the design needs to be changed or the structural part needs to be reworked when the digital micromirror units in different batches are installed, reduces the workload in the debugging process, saves time and cost, avoids errors observed by human eyes by means of equipment debugging, and ensures the accuracy of light receiving.
Description
Technical Field
The utility model relates to an optical instrument technical field, in particular to light path guiding mechanism based on digital micro mirror unit.
Background
In the light modulation and collection process, because the machining and installation of a mechanical structure and some errors of components exist, the change of the angle and the position of a light path can cause the loss of a finally collected light spot part, and great difficulty is caused for the accurate collection of light information. The mode of one-to-one correction of modulation components and structural parts is adopted, 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 detection equipment, and avoids the defect that index values are difficult to define by visual observation.
The method for acquiring target information by utilizing the digital micromirror unit to perform light modulation is more and more widely applied, particularly in imaging equipment, the method for generating a high-resolution target image by adopting the digital micromirror unit to perform light modulation, collecting and detecting through an optical system and combining a compressive sensing algorithm is widely researched in the directions of a single-pixel camera, spectral imaging and the like. The equipment has great requirements in the fields of biomedicine, environmental monitoring, homeland safety and the like.
The patent 201810430721.4 and 201810318644.3, 201810008742.7 provide application solutions of the digital micromirror unit in the field of imaging optical system, spectrometer, etc., but the patent mainly aims at protecting new solutions and methods, and does not relate to specific installation and light path debugging details in production. Patent 201710576290.8 is directed to heat dissipation applications for protection of digital micromirror units, and does not address assembly and debugging issues.
The digital micromirror unit is mostly applied to precise optical instruments, and has high requirements on optical path coaxiality, azimuth and the like, but the angular deflection of the micromirror unit can have an unavoidable error, and a mechanical structure can also cause an unavoidable assembly error, and particularly, a plurality of complex mechanical structures cause great difficulty in 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 the light receiving system based on the digital micromirror unit.
The prior art has the following defects:
in the mechanism, the digital micromirror unit specification considers that the piece has an error within a range of +/-1 degrees, and the error in different batches can be different, which increases the difficulty in matching design of the mechanical mechanism. When the project is designed in the early stage, the accurate angle of the micro mirror unit needs to be measured in advance, and the structural parts are modified one by one according to the test condition, so that the process is complicated, and a lot of unnecessary resources and time are wasted.
Secondly, there is certain error in the processing and installation of structure spare itself, and this error adopts the mode of adjusting the mounted position to correct mostly in the actual debugging process, but under the complicated condition of structure spare, the repeated adjustment has increased very big work load.
Disclosure of Invention
The to-be-solved technical problem of the utility model is to the aforesaid not enough, provide a light path guiding mechanism based on digital micro mirror unit.
The utility model discloses a realize through following technical scheme:
an optical path adjusting mechanism based on a digital micromirror unit, the optical path adjusting mechanism comprising: the digital micromirror unit adjusting mechanism is arranged at the rear side of the main body light splitting piece; the light receiving main body adjusting mechanism is arranged on 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 adjustment mechanism includes:
the digital micromirror unit is fixedly connected to the digital micromirror unit fixing piece, and the digital micromirror unit fixing piece is rotatably connected to the digital micromirror unit angle adjusting ring; the digital micromirror unit focusing surface adjusting ring is sleeved on the outer side of the digital micromirror unit angle adjusting ring, the digital micromirror unit angle adjusting ring is sleeved on the outer side of the main body light splitting piece, and the digital micromirror unit focusing surface adjusting ring is rotated to enable the digital micromirror unit angle adjusting ring to move back and forth relative to the main body light splitting piece and not rotate;
receive light main part adjustment mechanism includes:
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 circle center of the arc-shaped guide rail is the center of the digital micromirror 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 back and forth relative to the light receiving main body without rotating; and 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, according to the optical path adjusting mechanism based on the digital micromirror unit, a first hole is formed in the side wall of the digital micromirror unit focusing surface adjusting ring, and a first groove is formed in the inner side of the side wall of the digital micromirror unit focusing surface adjusting ring along the circumferential direction through the first hole; the main body light splitting piece 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 the side wall of the circular bulge is provided with a first strip hole along the axial direction; the digital micromirror unit focusing surface adjusting ring is sleeved on the outer side of the circular-ring-shaped bulge in a threaded manner, and the circular-ring-shaped bulge is sleeved on the outer side of the circular-ring-shaped bulge; and a screw is connected with the first threaded hole through the first hole and the first long hole, and a nut of the screw penetrates through the first hole and is embedded into the first groove.
Further, in the optical path adjusting mechanism based on the digital micromirror unit, the digital micromirror unit fixing member includes a digital micromirror unit connecting part and a rotating connecting part connected with the digital micromirror unit connecting part; the digital micromirror unit connecting part is connected with the digital micromirror unit, and the rotary connecting part is sleeved in the digital micromirror unit angle adjusting ring and is connected with the pressing sheet by a screw; openings are formed in two sides of the rotating connecting portion, second threaded holes are formed in corresponding positions of two sides of the digital micromirror unit angle adjusting ring, the digital micromirror unit angle adjusting screw rods extend into the openings through the second threaded holes, and the digital micromirror unit fixing piece is slightly rotated through telescopic adjustment of the two digital micromirror unit angle adjusting screw rods so as to adjust the angle of the digital micromirror unit.
Further, the optical path adjusting mechanism based on the digital micromirror unit comprises an adjusting main body, a light path adjusting mechanism and a light path adjusting mechanism, wherein 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 sequentially connected 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 matched and connected with the upper arc-shaped guide rail and the lower arc-shaped guide rail; a third strip hole is axially formed in the outer side plate, a third threaded hole is formed in the 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 so as to adjust the angle of the light receiving main body relative to the center line of the digital micromirror unit; the outer side plate with set up a plurality of third holes on the inner side plate respectively, a plurality of fixed jackscrews of angle screw in respectively a plurality of the third hole support stop in the main part beam split is in order to fix receive the light main part.
Further, in the optical path adjusting mechanism based on the digital micromirror unit, a fourth hole is formed in the side wall of the focusing surface adjusting ring, and a fourth groove is formed in the inner side of the side wall of the focusing surface adjusting ring along the circumferential direction through the fourth hole; a fourth threaded hole is formed in the side wall of the light receiving body, and a fourth strip-shaped hole is formed in the side wall of the focusing fixing inner ring along the axial direction; the focusing surface adjusting ring is sleeved on the outer side of the focusing fixing inner ring in a threaded manner, the focusing fixing inner ring is sleeved on 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 strip hole, and a nut of the focusing fixing screw penetrates through the fourth hole and is embedded into the fourth groove.
Further, according to 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.
Furthermore, in the optical path adjusting mechanism based on the digital micromirror unit, the number of the jackscrews is 4.
The utility model has the advantages and effects that:
1. the utility model provides an optical path guiding mechanism includes digital micro mirror unit adjustment mechanism, and the error and the installation error that digital micro mirror unit itself exists can be corrected to position and angle relation around its adjustable digital micro mirror unit relative main part beam split spare, have reduced the work that measurement and structure were modifyd repeatedly in advance, have avoided the repeated assembly process of digital micro mirror unit, will debug the process and simplify.
2. The utility model provides a light path guiding mechanism is including receiving light main part adjustment mechanism, and its adjustable both sides are received the angle that the light main part got into this light path guiding mechanism incident light relatively respectively, avoid installing repeatedly, and the regulation mutually noninterfere of light main part is received to both sides carries out independent adjustment to adapt to the inconsistent condition of structure assembly error.
3. The utility model provides a light path guiding mechanism includes optic fibre switching mounting, and its adjustable optic fibre switching mounting receives the positional relation of light main part relatively, and during the facula couples to optic fibre, can collect complete facula through the adjustment assurance of multidimension degree.
Drawings
Fig. 1 shows a schematic structural diagram of an optical path adjusting mechanism provided by the present 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 structural diagram of a focus plane adjustment ring of the optical path adjustment mechanism provided by the present invention;
fig. 7 shows an application schematic diagram of the optical path adjusting mechanism provided by the present invention.
Description of reference numerals: 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-notch, 12-digital micro mirror unit angle adjusting ring, 121-circular bulge, 122-first long strip hole, 13-digital micro mirror unit focusing surface adjusting ring, 131-first hole, 132-first groove, 14-digital micro mirror unit angle adjusting screw rod, 141-second threaded hole, 15-screw, 20-main body light splitting piece, 21-circular bulge, 22-first threaded hole, 23-upper arc guide rail groove, 24-lower arc guide rail groove, 25-third threaded hole, 30-light receiving main body, 31-fourth threaded hole, 40-adjusting main body, 401-upper cover plate, 402-lower cover plate, 403-outer side plate, 404-inner side plate, 405-front plate, 41-upper arc guide rail, 42-lower arc guide rail, 43-third long-strip hole, 44-angle adjusting screw, 45-third hole, 46-angle fixing jackscrew, 50-focusing surface adjusting ring, 501-fourth hole, 502-fourth groove, 51-focusing fixing inner ring, 511-fourth long-strip hole, 52-focusing fixing screw, 60-optical fiber switching fixing piece, 61-pressing ring, 62-jackscrew, 70-optical path adjusting mechanism, 71-bracket, 72-specimen stage, 73-reflector assembly, 74-microscope objective, 75-detector and 76-counting system.
Detailed Description
In order to make the purpose, technical solution and advantages of the present invention clearer, the following drawings in the embodiments of the present invention are combined to perform more detailed description on the technical solution in the embodiments of the present invention. The described embodiments are some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention. The embodiments of the present invention will be described in detail below with reference to the accompanying drawings:
in the description of the present invention, it is to 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 those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the invention.
Fig. 1 shows a schematic structural diagram of the 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 on 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 dmd adjustment mechanism includes a dmd 10, a dmd fixing member 11, a dmd angle adjustment ring 12, and a dmd focal plane adjustment ring 13. The digital micromirror unit adjusting mechanism comprises a digital micromirror unit front-back adjusting mechanism and a digital micromirror unit angle adjusting mechanism, and adjusts the position of the digital micromirror unit 10 in a front-back movement and micro-rotation mode to achieve the focusing purpose. The dmd 10 is fixedly connected to the dmd fixing member 11, and the dmd fixing member 11 is rotatably connected to the dmd angle adjusting ring 12. The digital micromirror unit focusing surface 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 focusing surface 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 without rotating.
The front and back adjusting mechanism of the digital micro-mirror unit is specifically. The sidewall of the digital micromirror unit focusing surface adjusting ring 13 is provided with a first hole 131, and the inner side of the sidewall of the digital micromirror unit focusing surface adjusting ring 13 is provided with a first groove 132 along the circumferential direction through the first hole 131. The main body light splitting component 20 has a circular protrusion 21, and a first threaded hole 22 is formed in a side wall 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 of the circular protrusion 121 is smaller than the inner diameter of the digital micromirror unit focal plane adjusting ring 13, and a first elongated hole 122 is axially formed in the side wall of the circular protrusion 121. The digital micromirror unit focusing surface adjusting ring 13 is in threaded sleeve connection with the outer side of the circular bulge 121, and the circular bulge 121 is in sleeve connection with the outer side of the circular bulge 21. The screw 15 is connected to the first threaded hole 22 through the first hole 131 and the first elongated hole 122, and the nut of the screw 15 is inserted into the first groove 132 through the first hole 131. Since the nut of the screw 15 is inserted into the first groove 132, the digital micromirror unit focal plane adjusting ring 13 can only rotate relative to the main body beam splitter 20 and cannot move back and forth; the digital micromirror unit angle adjusting ring 12 can only move back and forth and cannot rotate relative to the main body beam splitter 20 due to the axial first elongated hole 122; the digital micromirror unit focusing surface adjusting ring 13 is rotated, and the digital micromirror unit focusing surface adjusting ring 13 is in threaded connection with the digital micromirror unit angle adjusting ring 12, so that the digital micromirror unit angle adjusting ring 12 drives the digital micromirror unit 10 to move back and forth relative to the main body light splitting part 20. The maximum range of the back and forth movement of the dmd 10 with respect to the body beam splitter 20 is the length of the first elongated hole 122.
As shown in fig. 3, the digital micromirror unit angle adjustment mechanism is specific. The dmd fixing member 11 includes a dmd connecting portion 111 and a rotation connecting portion 112, and the dmd connecting portion 111 and the rotation connecting portion 112 are integrally connected. The digital micromirror unit 10 is fixedly connected to the digital micromirror unit connecting portion 111, and the rotating connecting portion 112 is sleeved in the digital micromirror unit angle adjusting ring 12 and is connected to the pressing piece 113 by a screw, so that the digital micromirror unit fixing member 11 can rotate relative to the digital micromirror unit angle adjusting ring 12 and can not move forward and backward. Two sides of the rotation connecting portion 112 are respectively provided with a notch 114, and the notches 114 are in an open right angle and extend to the outside of the rotation connecting portion 112. The two side walls of the digital micromirror unit angle adjusting ring 12 are respectively provided with a second threaded hole 141 corresponding to the two notches 114, the digital micromirror unit angle adjusting screw 14 extends into the notch 114 through the second threaded hole 141, and the digital micromirror unit fixing member 11 is rotated slightly by the telescopic adjustment of the two digital micromirror unit angle adjusting screws 14, so as to adjust the angle of the digital micromirror unit 10. Specifically, when the two digital micromirror units angle adjusting screws 14 are abutted against the inner wall of the opening 114, the rotating connection part 112 is locked, i.e. the digital micromirror unit 10 is fixed relative to the main body beam splitter 20. When at least one digital micromirror unit angle adjusting screw 14 is far away from the inner wall of the opening 114, according to the actual situation, the digital micromirror unit angle adjusting screw 14 in the required rotation direction can be screwed into the inner wall of the opening 114, the digital micromirror unit angle adjusting screw 14 on the opposite side is screwed out, and the rotation connecting 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 out the two digital micromirror unit angle adjustment screws 14. The size of the gap 114 is set according to the amount of angular adjustment required, which is preferably ± 5 °.
As shown in fig. 4 and 5, the light receiving body adjusting mechanism is a bilateral symmetry structure, and includes a light receiving body 30 and an adjusting body 40, and the light receiving bodies 30 on both sides can be independently angle-adjusted to adapt to the situation of inconsistent assembly errors of the structural members. The light receiving body 30 is fixedly connected to the adjusting body 40, and the adjusting body 40 is connected to the main body light splitting part 20 through an arc-shaped guide rail, so as to adjust the angle of the light receiving body 30 relative to the main body light splitting part 20. The center of the arc-shaped guide rail is the installation center of the digital micromirror unit 10.
Specifically, the adjusting body 40 includes an upper cover plate 401, a lower cover plate 402, an outer plate 403, an inner plate 404 and a front plate 405, the upper cover plate 401, the inner plate 404, the lower cover plate 402 and the outer plate 403 are sequentially connected end to form a rectangular parallelepiped and are all connected to one side of the front plate 405, and the light collecting 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 part 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 manner. The light receiving bodies 30 move circularly along the upper and lower arc-shaped guide rail grooves along with the adjusting bodies 40 to realize the angle adjustment of the light receiving 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 provided with a third elongated hole 43 axially, a third threaded hole 25 is provided at a corresponding position of the main body light splitter 20, and the angle adjusting screw 44 is screwed into and out of the third threaded hole 25 through the third elongated hole 43 to adjust the angle of the light receiving main body 30 with respect to the center line of the dmd 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 screws 46 are respectively screwed into the plurality of third holes 45 to abut against the main body light-splitting component 20 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 leave from the center line of the digital micromirror unit 10 along the upper and lower arc-shaped guide rail grooves, and after reaching a predetermined period, the angle fixing screws 46 at both sides are screwed in and abut against both sides of the body light splitter 20, that is, the light receiving body 30 is fixed relative to the body light splitter 20.
As shown in fig. 5 and 6, the optical fiber adapter fixing member adjusting mechanism includes an optical fiber adapter fixing member 60, a focus plane adjusting ring 50, a focus fixing inner ring 51, and a pressing ring 61. The optical fiber switching fixing part adjusting mechanism comprises an optical fiber switching fixing part front-back adjusting mechanism and an optical fiber switching fixing part position adjusting mechanism, and the position of the optical fiber switching fixing part 60 is adjusted in a front-back moving, rotating and position moving mode to achieve the focusing purpose. The focus plane adjusting ring 50 is sleeved on the outer side of the focus fixing inner ring 51, the focus fixing inner ring 51 is sleeved on the outer side of the front end of the light receiving main body 30, and the focus plane adjusting ring 50 is rotated to enable the focus fixing inner ring 51 to move back and forth relative to the light receiving main body 30 without rotating. The optical fiber adapter fixture 60 is fitted into the end of the focus fixing inner ring 51 and fixed by a pressing ring 61.
The front and rear adjusting mechanism of the optical fiber switching fixing piece is specifically. The side wall of the focus plane adjusting ring 50 is provided with a fourth hole 501, and the inner side of the side wall of the focus plane adjusting ring 50 is provided with a fourth groove 502 along the circumferential direction through the fourth hole 501. The side wall of the light receiving body 30 is provided with a fourth threaded hole 31, and the side wall of the focus fixing inner ring 51 is provided with a fourth strip-shaped hole 511 along the axial direction. The focusing surface adjusting ring 50 is screwed on the outer side of the focusing fixing inner ring 51, the focusing fixing inner ring 51 is screwed on 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 the nut of the focusing fixing screw 52 passes through the fourth hole 501 and is embedded into the fourth groove 502. Since the nut of the focusing fixing screw 52 is embedded in the fourth groove 502, the focusing plane adjusting ring 50 can only rotate relative to the light collecting main body 30 and cannot move back and forth; the focusing fixed inner ring 51 can only move back and forth relative to the light receiving body 30 and can not rotate due to the arrangement of the axial fourth strip-shaped hole 511; the rotary focusing surface adjusting ring 50 realizes that the focusing 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 because the rotary focusing surface adjusting ring 50 is in threaded connection with the focusing fixing inner ring 51. The maximum range of the forward and backward movement of the fiber adapter holder 60 relative to the light collecting 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 tail end of the focusing fixing inner ring 51 is larger than the outer diameter of the optical fiber switching fixing piece 60, and at least 3 top threads 62 are uniformly distributed on the circumferential direction of the pressing ring 61 to fix the optical fiber switching fixing piece 60. Specifically, after the optical fiber adapter fixture 60 is installed in the end of the focus fixing inner ring 51 and the front and rear positions thereof are fixed by the pressing ring 61, the optical fiber adapter fixture 60 is moved up, down, left, right or rotated to a desired position relative to the focus fixing inner ring 51 according to actual requirements, and then the plurality of jackscrews 62 are screwed in sequence to abut against the side surface of the optical fiber adapter fixture 60, that is, the optical fiber adapter fixture 60 is fixed relative to the focus fixing inner ring 51. Preferably, the number of the jack wires 62 is 4.
Fig. 7 shows an application schematic diagram of the optical path adjusting mechanism provided by the present invention. The optical path adjusting mechanism 70 and the reflector component 73 are arranged on the bracket 71, the microscope objective 74 is arranged below the reflector component 73, the specimen stage 72 is arranged below the microscope objective 74, the optical fiber switching fixing piece 60 is connected to the detector 75 through an optical fiber, and the detector 75 is connected to the counting system 76. The specimen to be measured is placed on the specimen stage 72, the fluorescence emitted by the specimen is collimated by the microscope objective 74 and reflected by the reflector assembly 73, enters the light path adjusting mechanism 70 for light coupling, the collected light is guided into the detector 75, and the light and the electric signal are synchronously input into the counting system 76 to complete data analysis. The specimen emits fluorescence, the fluorescence is transmitted upwards through the microscope objective, and then enters the light path adjusting mechanism after being reflected by the reflector component, an arrow in figure 1 is a light path after the light enters the light path adjusting mechanism, the light is modulated by the digital micro-mirror unit in the mechanism, the modulated light is coupled to an optical fiber through the left and right light receiving coupling systems, and finally enters the detector, and the optical signal is converted into an electric signal to be output to the counting system.
The adjusting method using the optical path adjusting mechanism comprises the following steps:
1. the digital micromirror unit is adjusted. On the premise that the light receiving main body 30 and the structural member thereof are not installed, the digital micromirror unit 10 is assembled on the digital micromirror unit fixing member 11, so that the digital micromirror unit 10 is approximately 45 degrees from the visual observation in the vertical direction, then the incident light source is turned on, and the light is modulated by the digital micromirror unit and then reflected to the two sides. Repeatedly screwing in and out the two digital micromirror unit angle adjusting screws 14 to adjust the angle of the digital micromirror unit; rotating the digital micromirror unit focusing surface adjusting ring 13 to adjust the front and back positions of the digital micromirror unit with respect to the main body beam splitter 20; until clear and bright light spots can be observed at the light outlets on the two sides, the light spots are centered up and down, the two digital micromirror units are screwed down and locked by the angle adjusting screw rods 14, and the digital micromirror unit focusing surface adjusting rings 13 are fixed.
2. The light receiving main body is adjusted. The light receiving body 30 and the structural members thereof are installed, and the angle adjusting screws 44 on the two sides are screwed in and out respectively to adjust the angle of the light receiving body 30 relative to the incident light entering the light path adjusting mechanism, and the visual observation light spot stops after being centered in the circular hole at the tail end of the light receiving body 30 and is locked by the angle fixing jackscrew 46.
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 focusing surface adjusting ring 50 is rotated to adjust the front and back positions of the optical fiber switching fixing member 60 relative to the light receiving main body 30, and simultaneously, the optical fiber inputs the detected light into the detector, feeds the detected light back to the counting system in real time, and records the counting value. When the maximum value of the number 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; then, the optical fiber switching fixing member 60 is adjusted relative to the light receiving main body 30 except for the front and rear positions, and when the maximum value of the number displayed by the counting system is found, the optical fiber switching fixing member 60 is fixed relative to the light receiving main body 30 by locking the plurality of jackscrews 62. The adjustment of the optical path adjusting mechanism is completed.
The above embodiments are only used to illustrate the technical solutions of the present invention, and are not used to limit the scope of the present invention. However, all equivalent changes and modifications made within the scope of the present invention should be considered as falling within the scope of the present invention.
Claims (7)
1. An optical path adjusting mechanism based on a digital micromirror unit, the optical path adjusting mechanism comprising: a digital micromirror unit adjusting mechanism disposed at the rear side of the main body light splitter (20); a light receiving body adjusting mechanism arranged on the front side of the 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 adjustment mechanism includes:
the digital micromirror unit (10) is fixedly connected to a digital micromirror unit fixing piece (11), and the digital micromirror unit fixing piece (11) is rotatably connected to a digital micromirror unit angle adjusting ring (12); a digital micromirror unit focusing surface 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 focusing surface 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;
receive light main part adjustment mechanism includes:
the light receiving main body (30) is fixedly connected to an adjusting main body (40), the adjusting main body (40) is connected with the main body light splitting part (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 back and forth relative to the light receiving main body (30) without rotating; an 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).
2. The digital micromirror unit-based optical path adjusting mechanism of claim 1, wherein the digital micromirror unit focusing surface adjusting ring (13) has a first hole (131) on its sidewall, and the inside of the sidewall of the digital micromirror unit focusing surface adjusting ring (13) has a first groove (132) circumferentially formed through the first hole (131); the main body light splitting piece (20) is provided with a circular protrusion (21), and a first threaded hole (22) is formed in the side wall of the circular protrusion (21); the digital micromirror unit angle adjusting ring (12) is provided with an annular bulge (121), and the side wall of the annular bulge (121) is provided with a first long hole (122) along the axial direction; the digital micromirror unit focusing surface 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 to the first threaded hole (22) via the first hole (131) and the first elongated hole (122), and a nut of the screw (15) is inserted into the first groove (132) through the first hole (131).
3. The digital micromirror unit-based optical path adjusting mechanism of claim 1, wherein the digital micromirror unit holder (11) comprises a digital micromirror unit connecting part (111) and a rotation connecting part (112) connected to 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 is connected with the pressing sheet (113) by a screw; openings (114) are formed in two sides of the rotating connecting portion (112), second threaded holes (141) are formed in corresponding positions of two sides of the digital micromirror unit angle adjusting ring (12), the digital micromirror unit angle adjusting screw rods (14) stretch into the openings (114) through the second threaded holes (141), and the digital micromirror unit fixing piece (11) is rotated slightly through telescopic adjustment of the two digital micromirror unit angle adjusting screw rods (14) so as to adjust the angle of the digital micromirror unit (10).
4. The optical path adjusting mechanism based on the digital micro-mirror unit as claimed in claim 1, wherein 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), 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 collecting 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 part (20) are respectively provided with an upper arc-shaped guide rail groove (23) and a lower arc-shaped guide rail groove (24) which are matched and connected with the upper arc-shaped guide rail (41) and the lower arc-shaped guide rail (42); a third elongated hole (43) is axially arranged on the outer side plate (403), a third threaded hole (25) is arranged at 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 elongated hole (43) to adjust the angle of the light receiving 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 the plurality of third holes (45) to abut against the main body light splitting piece (20) to fix the light receiving main body (30).
5. The optical path adjusting mechanism based on the digital micro-mirror unit as claimed in claim 1, wherein the sidewall of the focus plane adjusting ring (50) is opened with a fourth hole (501), and the inner side of the sidewall of the focus plane adjusting ring (50) is opened with a fourth groove (502) along the circumferential direction 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-shaped hole (511) is formed in the side wall of the focusing fixing inner ring (51) along the axial direction; the focusing surface adjusting ring (50) is sleeved on the outer side of the focusing fixing inner ring (51) in a threaded manner, the focusing fixing inner ring (51) is sleeved on the outer side of the light receiving main body (30), a focusing fixing screw (52) is connected with the fourth threaded hole (31) through the fourth hole (501) and the fourth strip-shaped 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).
6. The digital micro-mirror unit-based optical path adjusting mechanism as claimed in claim 1, wherein the inner diameter of the end of the focus fixing inner ring (51) is larger than the outer diameter of the optical fiber switching fixing member (60), and at least 3 top threads (62) are uniformly distributed in the circumferential direction of the pressing ring (61) to fix the optical fiber switching fixing member (60).
7. The digital micromirror unit-based optical path adjusting mechanism of claim 6, wherein the number of the top thread (62) is 4.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110376700A (en) * | 2019-08-02 | 2019-10-25 | 北京东方锐镭科技有限公司 | A kind of light-path adjusting mechanism and its method of adjustment based on digital micro-mirror unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110376700A (en) * | 2019-08-02 | 2019-10-25 | 北京东方锐镭科技有限公司 | A kind of light-path adjusting mechanism and its method of adjustment based on digital micro-mirror unit |
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