CN114545584A - Consistency checking method for accessories of wedge-shaped flat plate shearing interferometer - Google Patents
Consistency checking method for accessories of wedge-shaped flat plate shearing interferometer Download PDFInfo
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- CN114545584A CN114545584A CN202210146013.4A CN202210146013A CN114545584A CN 114545584 A CN114545584 A CN 114545584A CN 202210146013 A CN202210146013 A CN 202210146013A CN 114545584 A CN114545584 A CN 114545584A
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- 238000010008 shearing Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000010287 polarization Effects 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 230000003287 optical effect Effects 0.000 abstract description 2
- 238000003384 imaging method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 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
- 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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B11/27—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B9/00—Measuring instruments characterised by the use of optical techniques
- G01B9/02—Interferometers
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/62—Optical apparatus specially adapted for adjusting optical elements during the assembly of optical systems
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Instruments For Measurement Of Length By Optical Means (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
Abstract
The invention relates to the technical field of optical manufacturing, and discloses a consistency checking method for accessories of a wedge-shaped flat plate shearing interferometer, which is used for avoiding misjudgment of users. The method comprises the following steps: the assembling and debugging system of the wedge-shaped flat plate shearing interferometer is built and comprises a first base, a second base and a non-polarization beam splitter for splitting a collimated light beam to wedge-shaped prisms on two shearing plates, wherein a device for converging or diverging parallel collimated light is arranged between the non-polarization beam splitter and the second base; on the first base, rotating the wedge-shaped prism to enable interference fringes observed through the corresponding observation screen to be parallel to the scribed line on the observation screen, and then fixing the wedge-shaped prism on the corresponding shear plate to manufacture a fitting; mounting the manufactured accessory on a second base, observing whether the direction of the corresponding interference fringes deviating from the scribed line on the observation screen is consistent with the expected direction through the corresponding observation screen, and if so, determining that the accessory is qualified; otherwise, the wedge prism in the fitting is rotated by 180 degrees and then reassembled.
Description
Technical Field
The invention relates to the technical field of optical manufacturing, and discloses a method for checking consistency of accessories for a wedge-shaped flat plate shearing interferometer.
Background
The interference fringes generated by the wedge-shaped flat plate shearing interferometer can judge the collimation degree of the laser beam. The specific principle is as follows: the laser beam is incident to the wedge-shaped flat plate, light reflected by the front surface and the back surface of the wedge-shaped flat plate interferes at the observation panel, and when the incident light beam is parallel, the interference fringes are parallel to the scribed lines on the observation screen; when the incident beam is diverged or converged, the interference fringes are deflected when the interference fringes are parallel, and the deflection directions corresponding to the divergent beam and the convergent beam are opposite.
The assembly of the wedge-shaped flat plate shearing interferometer can be divided into the assembly of an observation plate and the assembly of a shear plate, and when the shear plate is assembled, the assembly angle of the wedge-shaped prism greatly influences the effect of the interferometer. The existing assembly method in the industry is to respectively line the edges of a mechanical part and a wedge prism to perform rough alignment, and the precision is poor.
Meanwhile, the shear plate is used as a replaceable accessory, the corresponding mechanical part and the wedge prism are usually from different manufacturers, and the gradual change direction of the narrow part and the wide part of the wedge prism is difficult to distinguish by naked eyes, so that careless mistakes for marking are easy to occur in the manufacturing process of the wedge prism. For example: the mark which should be marked on the high side by convention is marked on the narrow side, or the mark which should be marked on the narrow side by convention is marked on the high side. Therefore, after the shearing plate assembled according to the scribed line is assembled to the wedge-shaped flat plate shearing interferometer, the deflection directions corresponding to the divergent beams and the convergent beams are interchanged, and misjudgment of a user is easily caused.
Disclosure of Invention
The invention aims to disclose a consistency check method for accessories of a wedge-shaped flat plate shearing interferometer, so as to avoid causing misjudgment of users.
In order to achieve the purpose, the invention discloses a method for checking the consistency of accessories for a wedge-shaped flat plate shearing interferometer, which comprises the following steps:
s1, building a wedge-shaped flat plate shearing interferometer assembling and debugging system, wherein the system comprises a first base and a second base, each base is provided with a structure which is matched with the shearing plates in a dismounting way and is provided with a corresponding observation plate to form the wedge-shaped flat plate shearing interferometer, and the system also comprises a non-polarization beam splitter which splits a collimated beam to wedge prisms on the two shearing plates; a device for converging or diverging the parallel collimated light is arranged between the non-polarization beam splitter and the second base;
step S2, roughly aligning the mark of the wedge prism with the scribed line on the shear plate on the first base;
step S3, rotating the wedge-shaped prism through a rotation angle less than 180 degrees to enable interference fringes observed through the corresponding observation screen to be parallel to the scribed line on the observation screen, and then fixing the wedge-shaped prism on the corresponding shear plate to manufacture a fitting;
step S4, the manufactured accessory is installed on the second base, whether the direction of the corresponding interference fringes deviating from the scribed line on the observation screen is consistent with the expected direction or not is observed through the corresponding observation screen, and if so, the accessory is determined to be qualified; otherwise, the wedge prism in the fitting is rotated by 180 degrees and then the step S3 is executed again for re-assembly.
Preferably, the system is further provided with an image acquisition and display component for observing the relative relationship between the scribed lines and the interference fringes on the two observation screens.
The invention has the following beneficial effects:
the method is simple and practical, and improves the alignment precision of the wedge prism. The consistency of the shear plates is ensured, and the misjudgment of users is effectively avoided. Furthermore, the invention can omit the corresponding marking treatment on the shear plate, and can be briefly described as the following deformation method to ensure the consistency, wherein the method after deformation specifically comprises the following steps:
s10, building a wedge-shaped flat plate shearing interferometer assembling and debugging system, wherein the system comprises a first base and a second base, each base is provided with a structure which is matched with the shearing plates in a dismounting way and is provided with a corresponding observation plate to form the wedge-shaped flat plate shearing interferometer, and the system also comprises a non-polarization beam splitter which splits a collimated beam to wedge prisms on the two shearing plates; a device for converging or diverging the parallel collimated light is arranged between the non-polarization beam splitter and the second base;
step S20, on the first base, rotating the wedge prism to make the interference fringe observed by the corresponding observation screen parallel to the scribed line on the observation screen, and then fixing the wedge prism on the corresponding shear plate to make a fitting;
step S30, the manufactured accessory is installed on the second base, whether the direction of the corresponding interference fringes deviating from the scribed line on the observation screen is consistent with the expected direction or not is observed through the corresponding observation screen, and if so, the accessory is determined to be qualified; otherwise, the wedge prism in the fitting is rotated by 180 degrees and then the step S20 is executed again for re-assembly.
The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a block diagram of a wedge-shaped flat plate shearing interferometer assembling and debugging system according to an embodiment of the present invention.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
Example 1
The embodiment discloses a method for checking the consistency of accessories for a wedge-shaped flat plate shearing interferometer, which comprises the following steps:
s1, building a wedge-shaped flat plate shearing interferometer assembling and debugging system, wherein the system comprises a first base and a second base, each base is provided with a structure which is matched with the shearing plates in a dismounting way and is provided with a corresponding observation plate to form the wedge-shaped flat plate shearing interferometer, and the system also comprises a non-polarization beam splitter which splits a collimated beam to wedge prisms on the two shearing plates; and a device for converging or diverging the parallel collimated light is arranged between the non-polarizing beam splitter and the second base.
Generally, the first and second mounts are identical in structure and material to reduce errors. In this step, preferably, the system is further provided with an image acquisition and display component for observing the relative relationship between the scribed lines and the interference fringes on the two observation screens.
Specifically, as shown in fig. 1, a simple assembling and debugging system for a wedge-shaped flat plate shearing interferometer may specifically include: 1. a laser; 2. a beam expanding collimation device; 3. a non-polarizing beam splitter; 4. a wedge-shaped flat plate shearing interferometer base (a first base is arranged on the left side, and a second base is arranged on the right side); 5. shear plates (including wedge prisms and mechanical mounts); 6. a viewing plate (comprising a diffuser viewing screen and mechanical pieces); 7. an imaging lens; 8. an industrial camera; 9. a computer; 10. means for diverging the collimated light; 11. and (4) a diaphragm.
Step S2, roughly aligning the mark of the wedge prism with the scribe line on the cutting plate on the first base.
In this step, the markings of the wedge prism, which typically mark the narrow or high side of the prism cross-section as normal, are typically marked on the sides of the prism so as not to affect the propagation of the beam.
Step S3, rotating the wedge prisms through a rotation angle less than 180 degrees so that interference fringes observed through the corresponding viewing screen are parallel to the scribe lines on the viewing screen, and then fixing the wedge prisms on the corresponding shear plates to make the fittings.
In this step, the specific fixing mode can adopt a low-cost gluing mode, and secondary assembly is further facilitated.
Step S4, the manufactured accessory is installed on the second base, whether the direction of the corresponding interference fringes deviating from the scribed line on the observation screen is consistent with the expected direction or not is observed through the corresponding observation screen, and if so, the accessory is determined to be qualified; otherwise, the wedge prism in the fitting is rotated by 180 degrees and then the step S3 is executed again for re-assembly.
Example 2
This embodiment, as a variation of the above embodiment, may further omit the above-described corresponding marking process for the shear plates, and be briefly described as a method of the following variation to ensure consistency.
The method of the embodiment specifically comprises the following steps:
s10, building a wedge-shaped flat plate shearing interferometer assembling and debugging system, wherein the system comprises a first base and a second base, each base is provided with a structure which is matched with the shearing plates in a dismounting way and is provided with a corresponding observation plate to form the wedge-shaped flat plate shearing interferometer, and the system also comprises a non-polarization beam splitter which splits a collimated beam to wedge prisms on the two shearing plates; and a device for converging or diverging the parallel collimated light is arranged between the non-polarizing beam splitter and the second base.
And step S20, rotating the wedge-shaped prisms on the first base to enable the interference fringes observed by the corresponding observation screens to be parallel to the scribed lines on the observation screens, and then fixing the wedge-shaped prisms on the corresponding shear plates to manufacture the fittings.
Step S30, the manufactured accessory is installed on the second base, whether the direction of the corresponding interference fringes deviating from the scribed line on the observation screen is consistent with the expected direction or not is observed through the corresponding observation screen, and if so, the accessory is determined to be qualified; otherwise, the wedge prism in the fitting is rotated by 180 degrees and then the step S20 is executed again for re-assembly.
Similarly, the system of this embodiment is further provided with an image acquisition and display component for observing the relative relationship between the scribed lines and the interference fringes on the two observation screens, and the component can be specifically composed of an imaging lens, an industrial camera and a computer as shown in fig. 1.
In summary, the method for checking the consistency of the accessory for the wedge-shaped flat plate shearing interferometer disclosed by the embodiment of the invention is simple and practical, and improves the alignment precision of the wedge-shaped prism. The consistency of the shear plates is ensured, and the misjudgment of users is effectively avoided.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A method for checking consistency of accessories for a wedge-shaped flat plate shearing interferometer is characterized by comprising the following steps:
s1, building a wedge-shaped flat plate shearing interferometer assembling and debugging system, wherein the system comprises a first base and a second base, each base is provided with a structure which is matched with the shearing plates in a dismounting way and is provided with a corresponding observation plate to form the wedge-shaped flat plate shearing interferometer, and the system also comprises a non-polarization beam splitter which splits a collimated beam to wedge prisms on the two shearing plates; a device for converging or diverging the parallel collimated light is arranged between the non-polarization beam splitter and the second base;
step S2, roughly aligning the mark of the wedge prism with the scribed line on the shear plate on the first base;
step S3, rotating the wedge-shaped prism through a rotation angle less than 180 degrees to enable interference fringes observed through the corresponding observation screen to be parallel to the scribed line on the observation screen, and then fixing the wedge-shaped prism on the corresponding shear plate to manufacture a fitting;
step S4, the manufactured accessory is installed on the second base, whether the direction of the corresponding interference fringes deviating from the scribed line on the observation screen is consistent with the expected direction or not is observed through the corresponding observation screen, and if so, the accessory is determined to be qualified; otherwise, the wedge prism in the fitting is rotated by 180 degrees and then the step S3 is executed again for re-assembly.
2. The method of claim 1 wherein the system is further provided with an image acquisition and display assembly for viewing the relative relationship of the lines and fringes on the two viewing screens.
3. A method for checking consistency of accessories for a wedge-shaped flat plate shearing interferometer is characterized by comprising the following steps:
s10, building a wedge-shaped flat plate shearing interferometer assembling and debugging system, wherein the system comprises a first base and a second base, each base is provided with a structure which is matched with the shearing plates in a dismounting way and is provided with a corresponding observation plate to form the wedge-shaped flat plate shearing interferometer, and the system also comprises a non-polarization beam splitter which splits a collimated beam to wedge prisms on the two shearing plates; a device for converging or diverging the parallel collimated light is arranged between the non-polarization beam splitter and the second base;
step S20, on the first base, rotating the wedge-shaped prism to make the interference fringe observed by the corresponding observation screen parallel to the scribed line on the observation screen, and then fixing the wedge-shaped prism on the corresponding shear plate to make a fitting;
step S30, the manufactured accessory is installed on the second base, whether the direction of the corresponding interference fringes deviating from the scribed line on the observation screen is consistent with the expected direction or not is observed through the corresponding observation screen, and if so, the accessory is determined to be qualified; otherwise, the wedge prism in the fitting is rotated by 180 degrees and then the step S20 is executed again for re-assembly.
4. The method of claim 3 wherein the system is further provided with an image acquisition and display assembly for viewing the relative relationship of the lines and the fringes on the two viewing screens.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210146013.4A CN114545584B (en) | 2022-02-17 | 2022-02-17 | Fitting consistency verification method for wedge-shaped flat shearing interferometer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210146013.4A CN114545584B (en) | 2022-02-17 | 2022-02-17 | Fitting consistency verification method for wedge-shaped flat shearing interferometer |
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| CN114545584B CN114545584B (en) | 2023-11-03 |
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| CN114545584B (en) | 2023-11-03 |
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