CN111796391B - Right-angle prism clamping and fixing device, right-angle prism module and debugging method thereof - Google Patents
Right-angle prism clamping and fixing device, right-angle prism module and debugging method thereof Download PDFInfo
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- CN111796391B CN111796391B CN202010489281.7A CN202010489281A CN111796391B CN 111796391 B CN111796391 B CN 111796391B CN 202010489281 A CN202010489281 A CN 202010489281A CN 111796391 B CN111796391 B CN 111796391B
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000009434 installation Methods 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 230000002411 adverse Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
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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
- G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
- G02B7/1805—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for prisms
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mounting And Adjusting Of Optical Elements (AREA)
Abstract
In order to overcome the adverse effects of high and low temperature or vibration and other environments on the unevenness of the ridge of the right-angle prism and the stability of the azimuth angle, the invention provides a right-angle prism clamping and fixing device, a right-angle prism module and a debugging method thereof. The right-angle prism clamping and fixing device comprises a right-angle prism frame for installing the right-angle prism, a prism pressing plate for pressing and fixing the right-angle prism, a fixing seat for installing the right-angle prism frame and a fixing pressing plate for pressing and fixing the right-angle prism frame; the clamping and fixing device for the right-angle prism can realize high-stability limiting and fixing of the right-angle prism, and ensures that the unevenness and the azimuth angle of the ridge of the right-angle prism are fixed under various environment changes such as high and low temperature, vibration and the like after the right-angle prism is fixed.
Description
Technical Field
The invention relates to a right-angle prism clamping and fixing device, a right-angle prism module and a debugging method thereof.
Background
The right-angle prism is very commonly applied in the fields of positioning and orienting optical instruments such as a high-precision inertial measurement unit and the like and angle transmission and conversion of optical paths in optics. With environmental changes, such as under high and low temperatures or vibration conditions, the ridge unevenness and the azimuthal angle stability of a right-angle prism in an optical device such as a high-precision inertial measurement unit cannot be well guaranteed, and irregular changes can occur. Therefore, the stability of system parameters of optical equipment such as a high-precision inertial measurement unit and the like is directly influenced, so that a large error or even an error occurs in angle measurement or transmission, and an error of the whole measurement transmission system is caused.
Disclosure of Invention
In order to overcome the adverse effects of high and low temperature or vibration and other environments on the unevenness of the ridge of the right-angle prism and the stability of the azimuth angle, the invention provides a right-angle prism clamping and fixing device, a right-angle prism module and a debugging method thereof.
The technical scheme of the invention is as follows:
the right-angle prism clamping and fixing device is characterized in that: the device comprises a right-angle prism frame for installing a right-angle prism, a prism pressing plate for pressing and fixing the right-angle prism, a fixing seat for installing the right-angle prism frame and a fixing pressing plate for pressing and fixing the right-angle prism frame;
the right-angle prism frame comprises a bottom frame and two side plates which are respectively arranged at two end parts of the bottom frame; the shape of the side plate is matched with the right-angle triangular surface of the right-angle prism; the shape of the bottom frame is matched with the shape of the bottom surface of the right-angle prism; two sides of the upper part of the bottom frame are respectively provided with an outward-protruding mounting seat, and mounting fixing holes are formed in the mounting seats; both sides of the lower part of the bottom frame are respectively provided with a base which protrudes outwards along the length direction and the width direction of the bottom frame; defining one side of the base facing the right-angle prism as the inner side of the base, and defining one side of the base facing away from the right-angle prism as the outer side of the base; a first pressing surface is arranged at the upper end of the outer side of the base, and the first pressing surface inclines from the middle part of the upper end of the base to the lower part of the outer side of the base; the lower end surface of the base is a first base surface; the surface of the mounting seat facing the right-angle prism and the surface of the inner side of the base are second base planes;
the fixed seat is provided with an installation cavity matched with the rectangular prism frame in shape, and the upper part of the bottom frame of the rectangular prism frame is fastened in the installation cavity through screws; the inner side wall of the lower end of the mounting cavity is a third base plane, and the bottom surface of the mounting cavity is a fourth base plane; the third base surface is used for being in close fit with the first base surface, and the fourth base surface is used for being in close fit with the second base surface;
a pressing plate mounting groove is formed in the fourth base surface;
the shape of the fixed pressing plate is matched with that of the pressing plate mounting groove, and the fixed pressing plate is fixedly mounted in the pressing plate mounting groove; the lower part of the fixed pressing plate is provided with a second pressing surface matched with the first pressing surface, the middle part of the fixed pressing plate is provided with a screw hole, the upper part of the fixed pressing plate is provided with a step, the upper surface of the step is an arc surface, and the end surface of the step is a fulcrum surface; the second pressing surface is used for being tightly attached to the first pressing surface so as to limit and fix the lower part of the bottom frame of the right-angle prism frame; the arc surface is tangent to the upper top surface of the pressure plate mounting groove, and the fulcrum surface is contacted with the bottom surface of the pressure plate mounting groove.
Furthermore, a stress relief groove is arranged between the second base surface and the bottom frame.
Further, the inboard lower extreme of base is chamfered to have the edges and corners, separates first basal plane and second basal plane through the edges and corners.
Further, the inclination angle of the first pressing surface is 10-80 degrees.
Further, the inclination angle of the first pressing surface is 60 °.
The invention also provides a right-angle prism module, which comprises a right-angle prism; it is characterized in that: the device also comprises the right-angle prism clamping and fixing device; the right-angle prism is fixedly arranged in a right-angle prism frame of the right-angle prism clamping and fixing device.
The invention also provides a debugging method of the right-angle prism module, which is characterized by comprising the following steps:
step 1) assembling a right-angle prism assembly:
mounting a right-angle prism into a right-angle prism frame, sealing a proper amount of silica gel on two sides of the right-angle prism frame, then pressing the right-angle prism frame by using a prism pressing plate, and then fixedly mounting the prism pressing plate on a side plate by using a pressing screw to obtain a right-angle prism assembly;
step 2) assembling the right-angle prism assembly into the fixed seat;
step 3), adjusting the ridge unevenness of the right-angle prism:
repairing and grinding the first base surface of the right-angle prism frame until the ridge of the right-angle prism is parallel to the mounting base surface of the fixed seat;
step 4), adjusting the azimuth angle of the right-angle prism:
repairing and grinding a second base plane of the right-angle prism frame until the azimuth angle of the right-angle prism meets the design requirement;
and 5) compressing and fixing the right-angle prism frame by using the fixed pressing plate and the fixed screws.
The invention has the advantages that:
the clamping and fixing device for the right-angle prism can realize high-stability limiting and fixing of the right-angle prism, and ensures that the unevenness and the azimuth angle of the ridge of the right-angle prism are fixed under various environment changes such as high and low temperature, vibration and the like after the right-angle prism is fixed.
Drawings
Fig. 1 is a front view of a rectangular prism module of the present invention.
Fig. 2 is a sectional view taken along line a-a in fig. 1. The base plane B is shown as a reference for adjusting the azimuth angle of the rectangular prism assembly.
Fig. 3 is a sectional view taken along line B-B in fig. 1.
Fig. 4 is a front view of a rectangular prism frame according to the present invention.
Fig. 5 is a left side view of the rectangular prism frame in the present invention. Fig. 6 is a rear view of a rectangular prism frame according to the present invention.
Fig. 7 is a block diagram of a rectangular prism assembly of the present invention.
Fig. 8 is a structural view of the holder of the present invention.
Fig. 9 is a sectional view taken along line C-C in fig. 8.
Fig. 10 is a front view of the stationary platen of the present invention.
Fig. 11 is a left side view of the stationary platen of the present invention.
Fig. 12 is a rear view of the stationary platen of the present invention.
Fig. 13 is a diagram of a degree of freedom analysis of a rectangular prism assembly in accordance with the present invention.
Description of reference numerals:
1-a compression screw; 2-prism pressing plate; 3-a right angle prism; 4-a right angle prism frame; 41-bottom frame; 42-a mounting seat; 421-installing a fixing hole; 43-a base; 431-a first compression surface; 432-corner angle; 44-a first base surface; 441-left boss; 442-right boss; 45-a second base surface; 46-stress relief grooves; 47-side plate; 48-a threaded hole; 491. 492-mounting bosses; 5, fixing a pressing plate; 51-a second compression surface; 52-arc surface; 53-fulcrum plane; 54-screw holes; 6-fixing the base; 61-a third base surface; 62-a fourth base surface; 63-a platen mounting groove; 64-upper top surface; 7-fixing the screw.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 to 3, the rectangular prism module provided by the present invention includes a rectangular prism 3 and a rectangular prism clamping and fixing device; the right-angle prism clamping and fixing device comprises a right-angle prism frame 4 for installing the right-angle prism 3, a prism pressing plate 2 for pressing and fixing the right-angle prism 3, a fixing seat 6 for installing the right-angle prism frame 4 and a fixing pressing plate 5 for pressing and fixing the right-angle prism frame 4.
As shown in fig. 4 to 6, the rectangular prism frame 4 includes a bottom frame 41 and two side plates 47 respectively disposed at both end portions of the bottom frame 41; the shape of the side plate 47 is matched with two right-angle triangular surfaces of the right-angle prism 3; the shape of the bottom frame 41 is matched with the shape of the bottom surface of the right-angle prism 3; the side plate 47 is provided with a threaded hole 48 matched with a set screw, and when the right-angle prism is assembled, the right-angle prism is properly pushed and tightened by the set screw; two convex mounting seats 42 are respectively arranged at two sides of the upper part of the bottom frame 41, and mounting and fixing holes 421 are arranged on the mounting seats 42; two sides of the lower part of the bottom frame 41 are respectively provided with a base 43 which protrudes outwards along the length direction and the width direction of the bottom frame 41; for convenience of description, the side of the base 43 facing the right-angle prism 3 is defined as the inner side of the base 43, and the side facing away from the right-angle prism 3 is defined as the outer side of the base 43; a first pressing surface 431 with an oblique angle of 60 degrees is arranged at the upper end of the outer side of the base 43, and the first pressing surface 431 inclines from the middle part of the upper end of the base 43 to the lower part of the outer side of the base; the lower end surface of the base 43 is a first base surface 44; the surface of the mounting seat 42 facing the right-angle prism 3 and the surface of the inner side of the base seat 43 are second base surfaces 45; a stress relief groove 46 is formed between the second base surface 45 and the bottom frame 41, and the stress relief groove 46 can eliminate the influence of local compression stress on the overall stability of the rectangular prism frame 4.
The unevenness of the ridge of the right-angle prism 3 can be adjusted by grinding the first base surface 44, and the azimuth angle reflected by the right-angle prism 3 can be adjusted by grinding the second base surface 45; as shown in fig. 5, in order to ensure that the unevenness of the prism 3 does not affect the azimuth adjustment process, the first base surface 44 is separated from the second base surface 45 by a chamfer 432 at the inner lower end of the base 43.
As shown in fig. 7, the rectangular prism 3 is installed in the rectangular prism frame 4, after sealing a proper amount of silica gel on both sides, the prism pressing plate 2 is pressed tightly, and then the prism pressing plate 2 is fixedly installed on the side plate 47 by the pressing screw 1, so as to form the rectangular prism assembly.
The structure of the fixed seat 6 is shown in fig. 8-9, an installation cavity matched with the rectangular prism frame 4 in shape is arranged on the fixed seat 6, the inner side wall of the lower end of the installation cavity is a third base surface 61, and the bottom surface of the installation cavity is a fourth base surface 62; after installing the right angle prism subassembly assembled in fixing base 6, the tight cooperation is pasted to the first base face 44 on third base face 61 on the fixing base 6 and the right angle prism frame 4, and the tight cooperation is pasted to the second base face 45 on fourth base face 62 on the fixing base 6 and the right angle prism frame 4 to guarantee the stability of right angle prism's ridge inequality.
After the rectangular prism frame 4 is installed in the fixed base 6, it is pressed and fixed by the fixed pressing plate 5 as shown in fig. 10-12, therefore, the fourth base surface 62 of the fixed base 6 is designed with a pressing plate installation slot 63 adapted to the shape of the fixed pressing plate 5 as shown in fig. 10-12 to be matched and assembled with the fixed pressing plate 5.
The structure of the fixed pressure plate 5 is shown in fig. 10-12, the lower part of the fixed pressure plate 5 is provided with a second pressing surface 51 matched with the first pressing surface 431 on the right-angle prism frame 4, and the oblique angle of the second pressing surface is also 60 degrees; the upper part of the fixed pressure plate 5 is provided with a step extending towards the inner side of the fixed pressure plate 5, the upper surface of the step is an arc surface 52, and the end surface of the step is a fulcrum surface 53; the middle part of the fixed pressing plate 5 is provided with a screw hole 54; in the assembled state, as shown in fig. 1 to 3, the second pressing surface 51 of the fixed pressing plate 5 is closely attached to the first pressing surface 431 of the right-angle prism frame 4, the arc surface 52 of the fixed pressing plate 5 is tangent to the upper top surface 64 of the pressing plate installation groove 63 on the fixed base 6, and the fulcrum surface 53 is contacted with the bottom surface of the pressing plate installation groove 63 on the fixed base 6. When the fixing pressing plate 5 is applied, the fixing pressing plate 5 is equivalent to a lever taking the fulcrum surface 53 as a fulcrum, the fixing pressing plate 5 is pressed in the pressing plate mounting groove 63 by the fixing screw 7, and the second pressing surface 51 of the fixing pressing plate is used for limiting and fixing the rectangular prism frame 4. The upper surface of the upper step of the fixed pressure plate 5 is designed to be the arc surface 52 in order to adapt to the angle change after the rectangular prism frame 4 is repaired and ground.
When the right-angle prism assembly is installed on the fixed seat 6, the following method is needed to debug:
adjusting the unevenness of ridge:
the left boss 441 or the right boss 442 (shown in fig. 4) of the first base surface 44 of the rectangular prism frame 4 is repaired according to specific requirements to ensure that the ridge of the rectangular prism 3 is parallel to the mounting base surface a of the fixing base 6;
adjusting the azimuth angle:
the two mounting bosses 491 on the left side or the two mounting bosses 492 on the right side of the second base surface 45 of the rectangular prism frame 4 (as shown in fig. 6) are investigated according to specific requirements to ensure the requirement of the reflection angle (i.e. azimuth angle) of the rectangular prism 3.
After the unevenness and the azimuth angle of the ridge of the right-angle prism assembly are debugged to meet the requirements according to the requirements, the right-angle prism assembly is fixedly compressed as shown in figures 1-3.
As shown in fig. 1-3, after the rectangular prism assembly is assembled into the fixing base 6, the lower portion of the bottom frame 41 of the rectangular prism frame 4 is respectively pressed by the two fixing pressing plates 5, and the upper portion of the bottom frame 41 is fastened by the two fixing screws. As shown in fig. 2, two component forces of the pressure N of the fixed pressing plate 5 on the right angle prism frame 4 are N1 and N2, wherein the component force N1 acts to press the first base surface 44 of the right angle prism frame 4 against the third base surface 61 of the fixed base 6, so as to ensure the stability of the ridge unevenness of the right angle prism 3 installed in the right angle prism frame 4; the component N2 acts to press the second base surface 45 of the rectangular prism frame 4 against the fourth base surface 62 of the fixing base 6, so as to ensure the stable azimuth angle of the rectangular prism 3 installed in the rectangular prism frame 4.
The principle that the invention can ensure the unevenness of the ridge and the stable azimuth angle of the right-angle prism 3 is as follows:
as shown in fig. 13, the individual rectangular prism assemblies share 6 degrees of freedom, translation along the X, Y, and Z axes, and rotation about the X, Y, and Z axes. The component force N1 of the pressing force N of the fixed pressing plate 5 on the rectangular prism assembly restricts the translation of the rectangular prism assembly along the Y axis and the rotation of the rectangular prism assembly around the Z axis, and the component force N2 restricts the translation of the rectangular prism assembly along the Z axis, the rotation of the rectangular prism assembly around the Y axis and the rotation of the rectangular prism assembly around the X axis, so that 6 degrees of freedom of the rectangular prism assembly are restricted by 5, only one degree of freedom of the translation along the X axis is not restricted, but the translation of the rectangular prism assembly along the X axis does not influence the change of the ridge and the azimuth angle.
Claims (7)
1. Right angle prism centre gripping fixing device, its characterized in that: the device comprises a right-angle prism frame (4) for installing a right-angle prism (3), a prism pressing plate (2) for pressing and fixing the right-angle prism (3), a fixed seat (6) for installing the right-angle prism frame (4) and a fixed pressing plate (5) for pressing and fixing the right-angle prism frame (4);
the right-angle prism frame (4) comprises a bottom frame (41) and two side plates (47) which are respectively arranged at two end parts of the bottom frame (41); the shape of the side plate (47) is matched with the right-angle triangular surface of the right-angle prism (3); the shape of the bottom frame (41) is matched with the shape of the bottom surface of the right-angle prism (3); two sides of the upper part of the bottom frame (41) are respectively provided with a convex mounting seat (42), and the mounting seats (42) are provided with mounting and fixing holes (421); both sides of the lower part of the bottom frame (41) are respectively provided with a base (43) which protrudes outwards along the length and width directions of the bottom frame (41); one side of the base (43) facing the right-angle prism (3) is defined as the inner side of the base (43), and one side of the base (43) facing away from the right-angle prism (3) is defined as the outer side of the base (43); a first pressing surface (431) is arranged at the upper end of the base (43), and the first pressing surface (431) inclines from the middle part of the upper end of the base (43) to the lower part of the outer side of the base; the lower end surface of the base (43) is a first base surface (44); the surface of the mounting seat (42) facing the right-angle prism (3) and the inner side surface of the base (43) are second base surfaces (45);
the fixed seat (6) is provided with an installation cavity matched with the shape of the right-angle prism frame (4), and the upper part of the bottom frame (41) of the right-angle prism frame (4) is fastened in the installation cavity through screws; the inner side wall of the lower end of the mounting cavity is a third base surface (61), and the bottom surface of the mounting cavity is a fourth base surface (62); -said third base surface (61) is for snug fit with said first base surface (44), and-said fourth base surface (62) is for snug fit with said second base surface (45);
a pressing plate mounting groove (63) is formed in the fourth base surface (62);
the shape of the fixed pressing plate (5) is matched with that of the pressing plate mounting groove (63), and the fixed pressing plate is fixedly mounted in the pressing plate mounting groove (63); a second pressing surface (51) matched with the first pressing surface (431) is arranged at the lower part of the fixed pressing plate (5), a screw hole (54) is formed in the middle of the fixed pressing plate, a step is formed in the upper part of the fixed pressing plate, the upper surface of the step is an arc surface (52), and the end surface of the step is a fulcrum surface (53); the second pressing surface (51) is used for being attached to the first pressing surface (431) tightly so as to limit and fix the lower part of the bottom frame (41) of the rectangular prism frame (4); the arc surface (52) is tangent to the upper top surface (64) of the pressure plate mounting groove (63), and the fulcrum surface (53) is contacted with the bottom surface of the pressure plate mounting groove (63).
2. The right angle prism clamping fixture as claimed in claim 1, wherein: a stress relief groove (46) is arranged between the second base surface (45) and the bottom frame (41).
3. The right angle prism clamping fixture as claimed in claim 1 or 2, wherein: the lower end of the inner side of the base (43) is inverted with an edge (432), and the first base surface (44) is separated from the second base surface (45) by the edge (432).
4. The right angle prism clamping fixture as claimed in claim 3, wherein: the inclination angle of the first pressing surface (431) is 10-80 degrees.
5. The right angle prism clamping fixture as claimed in claim 4, wherein: the first pressing surface (431) has an inclination angle of 60 °.
6. The right-angle prism module comprises a right-angle prism (3); the method is characterized in that: further comprising the right angle prism clamping fixture of any of claims 1-5; the right-angle prism (3) is fixedly arranged in a right-angle prism frame (4) of the right-angle prism clamping and fixing device.
7. The method of debugging a rectangular prism module according to claim 6, comprising the steps of:
step 1) assembling a right-angle prism assembly:
installing a right-angle prism (3) into a right-angle prism frame (4), sealing a proper amount of silica gel on two sides, then pressing the two sides by using a prism pressing plate (2), and then fixedly installing the prism pressing plate (2) on a side plate (47) by using a pressing screw (1) to obtain a right-angle prism assembly;
step 2), assembling the right-angle prism assembly into a fixed seat (6);
step 3), adjusting the ridge unevenness of the right-angle prism (3):
repairing and grinding the first base surface (44) of the right-angle prism frame (4) until the ridge of the right-angle prism (3) is parallel to the mounting base surface (A) of the fixed seat (6);
step 4), adjusting the azimuth angle of the right-angle prism (3):
repairing and grinding a second base surface (45) of the right-angle prism frame (4) until the azimuth angle of the right-angle prism (3) meets the design requirement;
and step 5), the right-angle prism frame (4) is pressed and fixed by using the fixed pressing plate (5) and the fixing screws.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010489281.7A CN111796391B (en) | 2020-06-02 | 2020-06-02 | Right-angle prism clamping and fixing device, right-angle prism module and debugging method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010489281.7A CN111796391B (en) | 2020-06-02 | 2020-06-02 | Right-angle prism clamping and fixing device, right-angle prism module and debugging method thereof |
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| CN111796391B true CN111796391B (en) | 2021-07-27 |
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| CN116184617B (en) * | 2023-02-23 | 2023-10-20 | 广州长步道光学科技有限公司 | Reflecting prism angle adjusting structure and lens |
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