CN215114437U - Prism light beam translation parallel difference measuring device - Google Patents
Prism light beam translation parallel difference measuring device Download PDFInfo
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- CN215114437U CN215114437U CN202121719230.5U CN202121719230U CN215114437U CN 215114437 U CN215114437 U CN 215114437U CN 202121719230 U CN202121719230 U CN 202121719230U CN 215114437 U CN215114437 U CN 215114437U
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- 238000012360 testing method Methods 0.000 claims abstract description 50
- 238000001514 detection method Methods 0.000 claims abstract description 47
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 claims description 21
- 238000005259 measurement Methods 0.000 claims description 12
- 239000000835 fiber Substances 0.000 claims description 5
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- CPBQJMYROZQQJC-UHFFFAOYSA-N helium neon Chemical compound [He].[Ne] CPBQJMYROZQQJC-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a prism light beam translation parallel difference measuring device, which comprises a test light source, a light source controller and a light source controller, wherein the test light source is used for outputting a detection light signal; the bearing table is arranged along the advancing direction of the detection optical signal, is adjacent to the test light source and is used for bearing a prism, and the prism receives the detection optical signal and refracts and/or reflects the detection optical signal to form an output optical signal; and the display unit is arranged in the advancing direction of the output optical signal, is spaced at a preset distance from the bearing table and is used for displaying the output optical signal. This prism light beam translation run-parallel difference measuring device through setting up the testing arrangement that test light source, plummer and display element formed, can be fast, the accurate light beam run-parallel difference of measuring little prism.
Description
Technical Field
The utility model relates to an accurate optical measurement technical field specifically is a prism light beam translation parallel difference measuring device.
Background
Precision optical instruments and devices use a small, high precision translating prism, which is inserted in the optical path and the beam is parallel displaced. The cross-sectional shape of the translation prism is various, such as a rhombic prism, a periscopic prism, a hexagonal prism, a rectangular prism, or a non-single cemented prism, and the processing and detection requirements of the translation prism are high. Typically, for example, an oblique prism, as shown in fig. 1 and fig. 2, fig. 1 is a structural diagram of the oblique prism, the parallel light Beam from the left side is transmitted through a first incident surface 1 'and a first exit surface 2' of the prism and reflected by a first reflection surface 3 'and a second reflection surface 4' and then exits, the exiting light Beam is shifted downwards by a certain distance, and if the first reflection surface 3 'or the second reflection surface 4' is coated, it can also function as a polarization Beam splitter pbs (polarization Beam splitter) or an interference filter wdm (wavelength Division multiplex). However, a deviation or "parallel difference" in the angle α may occur between the direction of light exiting through the rhombic prism and the direction of the light flux when the prism is not inserted. For demanding applications, this parallelism difference is on the order of seconds.
Fig. 2 is a perspective view of a rhombic prism, typical dimensions of the rhombic prism are 0.7 × 0.7mm in length, width and height, angles a and B are 45 °, and the first reflecting surface 3 'and the second reflecting surface 4' are oblique sides with the side length of 1 mm. In the processing process of the rhombic prism, in the first step, a first reflecting surface 3 'and a second reflecting surface 4' are polished by using large plate glass, the parallelism difference can reach the second level, a large sheet is cut into slender strips, a first incident surface 1 is processed at an angle of 45 degrees, and then a first emergent surface 2 is processed by using a 'light glue' process. Because the size of the positioning surface of the upper disc is too small, the parallel difference between the upper disc and the processed actual first incident surface 1 and the first emergent surface 2 can enter the classification, and because the size of the prism is small, the traditional measuring methods such as a comparative goniometer and a plane interferometer are difficult to measure, or the measuring efficiency is very low.
SUMMERY OF THE UTILITY MODEL
The not enough to current detection technique, the utility model provides a poor measuring device of prism light beam translation parallel can be fast, the light beam parallel difference of the small prism of accurate measurement.
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: prism beam translation parallelism difference measuring device includes:
the test light source is used for outputting a detection light signal;
the bearing table is arranged along the advancing direction of the detection optical signal, is adjacent to the test light source and is used for bearing a prism, and the prism receives the detection optical signal and refracts and/or reflects the detection optical signal to form an output optical signal;
and the display unit is arranged in the advancing direction of the output optical signal, is spaced at a preset distance from the bearing table and is used for displaying the output optical signal.
Preferably, the test device further comprises a detection device disposed between the test light source and the carrying stage for controlling the input state of the detection light signal.
Preferably, an optical aperture is arranged in the middle of the detection device, and the optical aperture is used for controlling the incidence verticality of the detection optical signal;
the prism receives the detection optical signal and refracts and/or reflects the detection optical signal to form an output optical signal.
Preferably, the carrying table is a testing rotary table.
Preferably, a supporting device is disposed at one end of the testing rotary table, and the prism is disposed adjacent to the supporting device.
Preferably, the test rotary table comprises a step table surface for accommodating the prism, and the prism is arranged on the step table surface.
Preferably, the test rotation stage is configured to adjust the prism such that a test light source forms a test light spot on the display unit.
Preferably, the display unit is a light spot analyzer.
Preferably, the test light source is a fiber collimator or a he-ne laser or a laser pen outputting collimation.
Preferably, the cross-sectional shape of the prism is a rhombic prism, or a rhombic prism, a periscopic prism, a hexagonal prism, a rectangular prism, or such a prism glued together.
The utility model discloses possess following beneficial effect:
1. the testing device formed by the testing light source, the bearing table and the display unit can measure the beam parallel difference of the tiny prism, can also be applied to the measurement of the beam parallel difference of the prism with the common size, and has wide measuring range;
2. by setting the display unit as a light spot analyzer, the center position of a light spot can be accurately determined by analyzing the profile of an output light signal of the light spot through light, and the measurement precision of the parallel difference of the prism light beam is improved;
3. by arranging the detection device with the light hole, the incidence verticality of the detection light signal is controlled by the detection light signal passing through the light hole to form the detection light signal, so that the incidence verticality of the detection light signal is ensured, and the measurement precision of the prism light beam parallel difference is improved;
4. through being the test revolving stage with the plummer, in the one end of test revolving stage is provided with a strutting arrangement, the prism sets up with strutting arrangement is adjacent, and the test revolving stage accessible is measured twice and is eliminated the systematic error that exists among the test system, reduces the erroneous judgement to beam parallel error.
Drawings
FIG. 1 is a diagram of a prior art rhombus prism;
FIG. 2 is a perspective view of a prior art rhombus prism;
FIG. 3 is a schematic diagram of an optical path of a rhombic prism;
fig. 4 is a structural diagram of the prism beam translation parallel difference measuring device provided by the present invention;
fig. 5 is a structural diagram of the prism beam translation parallel difference measuring device provided by the present invention;
fig. 6 is a structure diagram of the prism beam translation parallel difference measuring device provided by the present invention.
In the figure: 1', a first incidence surface; 2', a first exit surface; 1. a first incident surface; 2. a first exit surface; 21. a second exit surface; 211. a third exit surface; 212. a fourth exit surface; 3', a first reflecting surface; 4', a second reflective surface; 31. a third reflective surface; 41. a fourth reflective surface; 60. a first bright spot; 61. a second bright spot; 62. a third bright spot; 7. a display unit; 8. testing the light source; 81. a second six-dimensional adjusting bracket; 82. detecting an optical signal; 83. outputting an optical signal; 9. a detection device; 10. a fourth bright spot; 11. a bearing table; 111. a five-dimensional adjusting frame; 12. a support device; 13. a step table; 14. an oblique square prism; 15. a light spot analyzer; 151. an adjustable translation guide rail; 16. an optical platform.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 4, the present invention provides a technical solution: the prism light beam translation parallel difference measuring device comprises a test light source 8, a detection light signal 82 and a light source control unit, wherein the test light source 8 is used for outputting the detection light signal; the carrier 11 is disposed along the advancing direction of the detection optical signal 82 and adjacent to the test light source 8, and is configured to carry an oblique prism 14, where the oblique prism 14 receives the detection optical signal 82 and refracts and/or reflects the detection optical signal 82 to form an output optical signal 83; the display unit 7, such as a paper surface or a photo card surface with a target ring, is disposed in the forward direction of the output optical signal 83 and spaced a predetermined distance from the carrier 11 to display the output optical signal 83.
The principle of the method is shown in fig. 3, according to the optical analysis method of the prism, the light beam parallel difference (angle alpha) of the small rhombic prism can be measured, the light beam parallel difference is spread along the first reflecting surface 3 and the second reflecting surface 4, the light beam parallel difference is spread to form a fourth reflecting surface 41 of a third reflecting surface 31 after the light beam parallel difference is spread, and the rhombic prism is spread to form a first incident surface 1 and a second emergent surface 21. Due to the processing error, the second emission surface 21 is not parallel to the first incident surface 1, and the third emission surface 211 or the fourth emission surface 212 is formed. The third emergent surface 211 forms a downward first wedge angle theta with the first incident surface 11The fourth emergent surface 212 forms an upward second wedge angle theta with the first incident surface 12. In the first stepA parallel detection light signal 82 which is vertically incident is provided on the light incident surface 1, a display unit 7 is provided at a position away from the prism by a predetermined distance, a first spot 60 is formed on the display unit 7 if the light is emitted from the second emission surface 21 parallel to the first light incident surface 1, a second spot 61 is formed on the display unit 7 if the light is emitted from the third emission surface 211, and a third spot 62 is formed on the display unit 7 if the light is emitted from the fourth emission surface 212.
In the measuring process, the fourth bright spot 10 is formed on the display unit 7 when the prism is not inserted, after the prism is inserted, the display unit 7 can generate the first bright spot 60, the second bright spot 61 or the third bright spot 62, the actual distance delta between the second bright spot 61 or the third bright spot 62 and the first bright spot 60 at the ideal position is interpreted through human eyes, and the parallel difference of the light beams of the prism can be quantitatively judged:
d × tg (α) ═ δ; equation one
From equation one, α ═ atg (δ/D).
Wherein: d is the distance from the rhombic prism to the display unit;
delta is the offset distance of the actual spot from the ideal spot.
In a preferred embodiment, as shown in fig. 5, a detection device 9, such as an aperture with a target ring, is disposed between the test light source 8 and the carrier 11 for controlling the input state of the detection light signal 82. An optical hole is arranged in the middle of the detection device 9, and the detection optical signal 82 passes through the optical hole to control the incidence verticality of the detection optical signal 82 relative to the prism to be detected; the cube prism 14 receives the detected optical signal 82 and refracts and/or reflects it to form an output optical signal 83. The reflected light from the first incident surface 1 on the diaphragm is observed, and if the reflected light hits back to the aperture of the diaphragm, it indicates that the first incident surface 1 is perpendicular to the incident light beam.
In a preferred embodiment, as shown in fig. 6, the carrier 11 is a test rotation stage, a support device 12, commonly called a positioning support, is disposed at one end of the test rotation stage, and the rhombic prism 14 is disposed adjacent to the support device 12. Or the supporting device 12 is not arranged, the test rotating platform comprises a step table surface 13 for accommodating the rhombic prism, the rhombic prism 14 is arranged on the step table surface 13, and the left side of the step table surface 13 is higher than the right side and plays the same role as the supporting device 12. The test rotary table and the five-dimensional adjusting frame 111 below the test rotary table form a first six-dimensional adjusting frame. The display unit 7 is a light spot analyzer 15 arranged on the adjustable translation guide rail 151. The test light source 8 is a fiber collimator, and the fiber collimator may be disposed on the second six-dimensional adjusting bracket 81. The rhombic prism 14 can be a slender prism before being cut into granules, and the cross-sectional shape of the prism is not limited to the rhombic prism, and can also be a prism which plays the same role in beam translation, or a non-monomer cemented prism.
If the preset distance between the display unit 7 and the rhombic prism is small, the offset cannot be normally read by human eyes; the display unit 7 may be arranged as a spot analyzer 15, such as a mechanically scanned BeamScan analyzer, or a CCD-type spot analyzer. The light spot analyzer can accurately determine the central position of the light spot by analyzing the Gaussian beam profile of the light spot, the positioning precision reaches 1um, the system is simple, the measurement precision is higher, and the prism beam translation parallel difference measuring device is arranged on the optical platform 16.
For example, if the actually measured light spot of the rhombic prism appears at the position of the third bright spot 62, the first incident surface 1 and the first exit surface 2 may not be parallel to each other, or the first incident surface 1 and the first exit surface 2 may be parallel to each other but the height of the rhombic prism may be too large.
The test rotating platform is used for adjusting the prism so that a test light source forms a test light spot on the display unit, and in order to eliminate system errors, the method adopted by the prism light beam translation parallel difference measuring device is to measure twice, namely, a first detection light signal is emitted into the first emergent surface 2 from the first incident surface 1 of & lt A, and a second oblique prism 14 is rotated to 180 degrees so that the detection light signal is emitted into the first incident surface 1 from the first emergent surface 2 of & lt B, the detection mode forms a corresponding test light spot on the display unit, the test light spot comprises a second bright spot 61 or a third bright spot 62, and the position distance between the two bright spots is 2 delta, so that the parallel difference alpha of the sample prism can be conveniently and accurately measured.
The novel system is convenient and flexible to compose, and the detection optical signals are not limited to come from a fiber collimator, and can come from other collimated light beams (such as a helium-neon laser or a laser pen), and can be visible light or invisible light. The whole testing device can be manually controlled or electrically controlled, and the testing result can be interpreted and output through software.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A prism beam translation parallelism measurement apparatus, comprising:
the test light source is used for outputting a detection light signal;
the bearing table is arranged along the advancing direction of the detection optical signal, is adjacent to the test light source and is used for bearing a prism, and the prism receives the detection optical signal and refracts and/or reflects the detection optical signal to form an output optical signal;
and the display unit is arranged in the advancing direction of the output optical signal, is spaced at a preset distance from the bearing table and is used for displaying the output optical signal.
2. The prism beam translational parallelism difference measurement apparatus of claim 1, further comprising a detection device disposed between the test light source and the carrier for controlling the input state of the detection light signal.
3. The prismatic beam translational parallelism difference-measuring apparatus of claim 2,
the middle of the detection device is provided with an optical hole which is used for controlling the incidence verticality of the detection optical signal;
the prism receives the detection optical signal and refracts and/or reflects the detection optical signal to form an output optical signal.
4. The prism beam translational parallelism difference-measuring apparatus of claim 1, wherein the stage is a test rotation stage.
5. The prism beam translation parallelism difference measurement apparatus of claim 4, wherein a support device is disposed at one end of the test rotation stage, and the prism is disposed adjacent to the support device.
6. The prism beam translation parallelism difference measurement apparatus of claim 4, wherein the test rotation stage comprises a stepped stage for receiving the prism, the prism being disposed on the stepped stage.
7. A prism beam translation parallelism difference-measuring apparatus according to claim 5 or 6, wherein the test rotation stage is configured to adjust the prism such that a test light source forms a test light spot on the display unit.
8. The prism beam translational parallelism difference measurement device of claim 1, wherein the display unit is a spot analyzer.
9. The prism beam translation parallelism difference measurement device of claim 1, wherein the test light source is a fiber collimator or a he-ne laser or a collimated output laser pointer.
10. The prismatic beam translational parallelism difference measuring apparatus of claim 1, wherein the cross-sectional shape of the prism is a rhombic prism, or a rhombic prism, a periscope prism, a hexagonal prism, a rectangular prism, or a cemented prism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121719230.5U CN215114437U (en) | 2021-07-27 | 2021-07-27 | Prism light beam translation parallel difference measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121719230.5U CN215114437U (en) | 2021-07-27 | 2021-07-27 | Prism light beam translation parallel difference measuring device |
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| CN215114437U true CN215114437U (en) | 2021-12-10 |
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| CN202121719230.5U Active CN215114437U (en) | 2021-07-27 | 2021-07-27 | Prism light beam translation parallel difference measuring device |
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Address after: 201822 South of Building 3, No. 33 Fuhua Road, Malu Town, Jiading District, Shanghai Patentee after: Shanghai Millimeter Star Optical Co.,Ltd. Address before: 201822 Building 9, No. 2465, Hengcang Road, Jiading District, Shanghai Patentee before: SHANGHAI NEXTREND TECHNOLOGY CO.,LTD. |
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Effective date of registration: 20231126 Address after: Area A, 1st Floor, Building 9, No. 2465 Hengcang Road, Jiading District, Shanghai, 2018 Patentee after: Shanghai Yiqing Optical Technology Co.,Ltd. Address before: 201822 South of Building 3, No. 33 Fuhua Road, Malu Town, Jiading District, Shanghai Patentee before: Shanghai Millimeter Star Optical Co.,Ltd. |
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