Quick alignment method and device for optical axes of parallel optical paths

Abstract

The invention discloses a quick alignment method and device for parallel light path optical axes, and solves the problem that large errors exist when parallel light path alignment is carried out through an existing method that light spots are observed through human eyes. First parallel light emitted by a first to-be-aligned parallel light device and second parallel light emitted by a second to-be-aligned parallel light device are subjected to center penetrating adjustment, and then the first to-be-aligned parallel light device and the second to-be-aligned parallel light device are subjected to pitching / deflection adjustment through a theodolite to achieve rapid alignment of parallel light path optical axes. The attitude of the parallel light can be embodied, calibration of the optical axis of the parallel light paths, alignment of the parallel light paths at the two ends and adjustment of the attitude of the parallel light paths can be completed while the attitude of one beam of parallel light is calibrated, the alignment effect is more accurate, and the alignment speed is higher.

Description

Technical Field

[0001] The present invention relates to an optical axis alignment method and device, and in particular to a rapid alignment method and device for parallel optical paths and optical axes. Background Art

[0002] Parallel light paths are widely used in optical systems such as collimators, beam reduction systems, and Schlieren systems. Rapid alignment of the parallel light path and calibration of the outgoing parallel light's posture are crucial components of the setup process, and how to quickly complete these operations during setup is a key concern for setup personnel. When collimators are used in optical systems to detect transmission coefficients and focal lengths, calibrating the optical axis posture of the outgoing parallel light allows the optical system's posture to be aligned with that of the parallel light, saving significant image-finding time.

[0003] Currently, when measuring focal length and transfer function using a collimator, the common method is to use the human eye to observe the position of the light spot falling on the optical system and then adjust the posture of the optical system. The human eye has a certain error in distinguishing the position of the light spot falling on the center of the optical system's light outlet. Especially when the optical system is equipped with a camera, the light spot needs to be adjusted to the center of the target surface, and relying on the human eye will result in even greater errors. Summary of the Invention

[0004] In order to solve the technical problem of large errors when aligning parallel light paths using the existing method of observing light spots with the human eye, the present invention provides a method and device for rapid alignment of the optical axes of parallel light paths, which can simultaneously and accurately complete the rapid alignment of parallel light paths or the posture calibration of parallel light paths.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A method for quickly aligning the optical axis of a parallel light path, for quickly aligning a first parallel light device and a second parallel light device, both of which include a primary mirror;

[0007] Its special feature is that it includes the following steps:

[0008] Step 1: Place the first parallel light device to be aligned and the second parallel light device to be aligned on the same plane, and adjust the first parallel light emitted by the first parallel light device to be aligned and the second parallel light emitted by the second parallel light device to be aligned to pass through the center;

[0009] Step 2: placing a first cross-reticle plate at the focal plane of the first parallel light device to be aligned, and placing a second cross-reticle plate at the focal plane of the second parallel light device to be aligned;

[0010] Step 3: placing a leveled theodolite between the first parallel light device to be aligned and the second parallel light device to be aligned, and adjusting the theodolite so that the image of the first cross-reticle falls on the center of the theodolite;

[0011] Step 4, observing whether the angle between the first parallel light and the vertical plane of the earth is 90° on the theodolite;

[0012] If it is 90°, step 5 is performed;

[0013] If it is not 90°, step 6 is performed;

[0014] Step 5, rotating the theodolite horizontally by 180°, adjusting the second parallel light device to be aligned, so that the image of the second crosshair scale falls in the center of the theodolite, completing the rapid alignment of the optical axis of the parallel light path;

[0015] Step 6, rotating the theodolite horizontally by 180°, changing the vertical angle of the theodolite to the supplementary angle of the first parallel light in the vertical direction, then adjusting the second parallel light device to be aligned, so that the image of the second crosshair scale falls in the center of the theodolite, completing the rapid alignment of the optical axis of the parallel light path.

[0016] Further, step 1 includes:

[0017] 1.1, placing an eight-wire instrument between the first parallel light device to be aligned and the second parallel light device to be aligned;

[0018] 1.2, if the exit aperture sizes of the parallel light paths of the first parallel light device to be aligned and the second parallel light device to be aligned are inconsistent, first align the cross laser line on one side of the eight-wire instrument with the mechanical frame center of the exit aperture of the parallel light device to be aligned with the larger aperture, then adjust the parallel light device to be aligned with the smaller aperture so that the mechanical frame center of its exit aperture is aligned with the cross laser line on the other side of the eight-wire instrument;

[0019] If the exit aperture sizes of the parallel light paths of the first parallel light device to be aligned and the second parallel light device to be aligned are consistent, adjust the first parallel light device to be aligned and the second parallel light device to be aligned respectively, so that the first parallel light and the second parallel light emitted by the two devices respectively coincide with the cross laser lines on both sides of the eight-wire instrument;

[0020] Complete the through adjustment of the first parallel light and the second parallel light.

[0021] Further, step 5 specifically includes:

[0022] 5.1, rotating the theodolite horizontally by 180°, observing whether the image of the second crosshair scale falls in the center of the theodolite;

[0023] If the image of the second crosshair scale falls in the center of the theodolite, the rapid alignment of the optical axis of the parallel light path is completed;

[0024] If the image of the second crosshair scale does not fall in the center of the theodolite, step 5.2 is performed;

[0025] 5.2, observing whether the second parallel light device to be aligned has the condition of adjusting the pitch and yaw attitude as a whole;

[0026] If not, adjusting the attitude of the primary mirror of the second parallel light device to be aligned so that the image of the second crosshair falls in the center of the theodolite, and completing the rapid alignment of the optical axis of the parallel light path;

[0027] If yes, adjusting the pitch and yaw attitude of the second parallel light device to be aligned as a whole until the second crosshair falls in the center of the theodolite, and completing the rapid alignment of the optical axis of the parallel light path.

[0028] Further, step 6 is specifically:

[0029] 6.1, rotating the theodolite horizontally by 180°, changing the vertical angle of the theodolite to the complementary angle of the first parallel light in the vertical direction, and observing whether the image of the second crosshair falls in the center of the theodolite;

[0030] If the image of the second crosshair falls in the center of the theodolite, the rapid alignment of the optical axis of the parallel light path is completed;

[0031] If the image of the second crosshair does not fall in the center of the theodolite, step 6.2 is performed;

[0032] 6.2, observing whether the second parallel light device to be aligned has the condition of adjusting the pitch and yaw attitude as a whole;

[0033] If not, adjusting the attitude of the primary mirror of the second parallel light device to be aligned so that the image of the second crosshair falls in the center of the theodolite, and completing the rapid alignment of the optical axis of the parallel light path;

[0034] If yes, adjusting the pitch and / or yaw attitude of the second parallel light device to be aligned as a whole until the second crosshair falls in the center of the theodolite, and completing the rapid alignment of the optical axis of the parallel light path.

[0035] Further, step 3 is specifically:

[0036] Placing the theodolite with a two-dimensional lifting platform at the bottom and in a leveling state between the first parallel light device to be aligned and the second parallel light device to be aligned, and adjusting the theodolite through the two-dimensional lifting platform so that the image of the first crosshair falls in the center of the theodolite.

[0037] A rapid alignment device for the optical axis of a parallel light path for implementing the rapid alignment method for the optical axis of the parallel light path, which is characterized by comprising a first crosshair, a second crosshair, and a theodolite;

[0038] The first crosshair is used to be installed at the focal plane of the first parallel light device to be aligned;

[0039] The second crosshair reticle is used to be installed at the focal plane of the second parallel light device to be aligned;

[0040] The theodolite is used to be arranged between the first parallel light device to be aligned and the second parallel light device to be aligned, to display the images of the first crosshair reticle and the second crosshair reticle and the angles of the first parallel light and the second parallel light in the vertical direction.

[0041] Further, an eight-line instrument is further included;

[0042] The eight-line instrument is used to adjust the first parallel light emitted by the first parallel light device to be aligned and the second parallel light emitted by the second parallel light device to be aligned.

[0043] Further, a two-dimensional lifting platform is further included;

[0044] The two-dimensional lifting platform is arranged at the bottom of the theodolite and is used to adjust the height of the theodolite.

[0045] The beneficial effects of the present application are as follows:

[0046] 1. The method and device for quickly aligning the optical axis of the parallel light path provided by the present application can quickly align the optical axis of the parallel light path by first adjusting the first parallel light emitted by the first parallel light device to be aligned and the second parallel light emitted by the second parallel light device to be aligned, and then adjusting the first parallel light device to be aligned and the second parallel light device to be aligned by the theodolite, so that the posture of the parallel light can be specified, the calibration of the optical axis of the parallel light path, the alignment of the two parallel light paths and the adjustment of the posture of the parallel light path can be completed at the same time when the posture of a parallel light is calibrated, the alignment effect is more accurate, and the alignment speed is faster.

[0047] 2. The method and device for quickly aligning the optical axis of the parallel light path provided by the present application are completed by using the eight-line instrument, the two-dimensional lifting platform and the theodolite in the whole process, and have the technical features of simple equipment, simple measurement method and low cost.

[0048] 3. The method and device for quickly aligning the optical axis of the parallel light path provided by the present application can quickly find the central field of view when measuring the focal length and the transmission function of the optical system compared with the observation by the human eye, and can be applied to the alignment of the optical systems such as the schlieren instrument light path, the beam reducer and the collimator, and has universal applicability.

[0049] 4. The method and device for quickly aligning the optical axis of the parallel light path provided by the present application can make the efficiency of the installation and adjustment of the schlieren light path, the integration of the collimator and the calibration of the optical axis higher and the quality better. BRIEF DESCRIPTION OF DRAWINGS

[0050] Figure 1is a structural schematic diagram of step 1 in an embodiment of the application for a fast alignment method of an optical axis of a parallel light path; wherein a represents that the apertures of the first parallel light device and the second parallel light device are inconsistent; b represents that the apertures of the first parallel light device and the second parallel light device are consistent;

[0051] Figure 2 is a structural schematic diagram of making the image of the first crosshair reticle fall in the center of the theodolite in step 3 of the embodiment of the application;

[0052] Figure 3 is a structural schematic diagram of the optical axis alignment of the first parallel light device and the second parallel light device in step 5 of the embodiment of the application.

[0053] Reference numerals:

[0054] 1-first parallel light device to be aligned, 2-second parallel light device to be aligned, 3-eight wire instrument, 4-first crosshair reticle, 5-second crosshair reticle, 6-theodolite, 7-two-dimensional lifting platform. DETAILED DESCRIPTION

[0055] The technical solutions of the application will be described clearly and completely in combination with the drawings and embodiments. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments of the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application.

[0056] The embodiment of the application provides a fast alignment method of an optical axis of a parallel light path, which is used for a first parallel light device and a second parallel light device each comprising a primary mirror; the used instrument equipment comprises a high-precision eight wire instrument 3, a first crosshair reticle 4, a second crosshair reticle 5, a theodolite 6 and a two-dimensional lifting platform 7.

[0057] The method comprises the following steps:

[0058] Step 1, making the first parallel light device to be aligned 1 and the second parallel light device to be aligned 2 be located on the same plane; specifically comprising:

[0059] 1.1, placing the eight wire instrument 3 between the first parallel light device to be aligned 1 and the second parallel light device to be aligned 2; using the eight wire instrument to ensure that the mechanical parts of the first parallel light device to be aligned 1 and the second parallel light device to be aligned 2 are on the same plane.

[0060] 1.2, as Figure 1As shown in Figure a, if the parallel light path exit apertures of the first parallel light device 1 to be aligned and the second parallel light device 2 to be aligned are different, the cross laser line on one side of the eight-line instrument 3 is first aligned with the center of the mechanical frame of the parallel light device with the larger aperture, and then the parallel light device with the smaller aperture is adjusted so that the center of its mechanical frame is aligned with the cross laser line on the other side of the eight-line instrument 3;

[0061] like Figure 1 As shown in b, if the apertures of the parallel light outlets of the first parallel light device 1 to be aligned and the second parallel light device 2 to be aligned are consistent, the first parallel light device 1 to be aligned and the second parallel light device 2 to be aligned are adjusted so that the first parallel light and the second parallel light emitted by the two devices coincide with the cross laser lines on both sides of the eight-line instrument 3 respectively.

[0062] Step 2: placing a first cross-reticle plate 4 at the focal plane of the first parallel light device 1 to be aligned, and placing a second cross-reticle plate 5 at the focal plane of the second parallel light device 2 to be aligned;

[0063] Step 3: Place the theodolite 6 with a two-dimensional lifting platform 7 at the bottom and in a leveling state between the first parallel light device 1 to be aligned and the second parallel light device 2 to be aligned. Figure 2 As shown, the image of the first cross-reticle plate 4 is observed at infinity, and the theodolite 6 is adjusted by the two-dimensional lifting platform 7 so that the image of the first cross-reticle plate 4 falls on the center of the theodolite 6. That is, the theodolite 6 is used to calibrate the first parallel light emitted by the first parallel light device 1 to be aligned, and the first parallel light is used as the reference light for subsequent adjustments;

[0064] Step 4: Observe on the theodolite 6 whether the angle between the first parallel light and the vertical plane of the earth is 90°; the vertical plane of the earth is a plane perpendicular to the horizontal plane of the earth;

[0065] If it is 90°, go to step 5;

[0066] If it is not 90°, go to step 6;

[0067] Step 5: Figure 3 As shown, the theodolite 6 is rotated horizontally by 180°, and the second parallel light device 2 to be aligned is adjusted so that the image of the second cross-reticle 5 falls on the center of the theodolite 6, completing the rapid alignment of the optical axis of the parallel light path. The details are as follows:

[0068] 5.1. Rotate theodolite 6 horizontally 180° and check whether the image of the second cross-reticle 5 falls on the center of theodolite 6.

[0069] If the image of the second cross-reticle 5 falls on the center of the theodolite 6, the rapid alignment of the optical axes of the parallel light paths is completed;

[0070] If the image of the second cross-reticle 5 does not fall on the center of the theodolite 6, proceed to step 5.2;

[0071] 5.2, observing whether the second parallel light device 2 has the condition of adjusting the pitch and yaw attitude as a whole;

[0072] If not, the attitude of the main mirror of the second parallel light device 2 is adjusted so that the image of the second crosshair 5 falls in the center of the theodolite 6, and the fast alignment of the optical axis of the parallel light path is completed.

[0073] If yes, the pitch and yaw attitude of the second parallel light device 2 is adjusted as a whole until the image of the second crosshair 5 falls in the center of the theodolite 6, and the fast alignment of the optical axis of the parallel light path is completed.

[0074] Step 6, the theodolite 6 is rotated horizontally by 180°, the vertical angle of the theodolite 6 is changed to the supplementary angle of the first parallel light in the vertical direction, and then the second parallel light device 2 is adjusted so that the image of the second crosshair 5 falls in the center of the theodolite 6, and the fast alignment of the optical axis of the parallel light path is completed. The specific process is as follows:

[0075] 6.1, the theodolite 6 is rotated horizontally by 180°, the vertical angle of the theodolite 6 is changed to the supplementary angle of the first parallel light in the vertical direction, and then it is observed whether the image of the second crosshair 5 falls in the center of the theodolite 6;

[0076] If the image of the second crosshair 5 falls in the center of the theodolite 6, the fast alignment of the optical axis of the parallel light path is completed.

[0077] If the image of the second crosshair 5 does not fall in the center of the theodolite 6, step 6.2 is performed.

[0078] 6.2, observing whether the second parallel light device 2 has the condition of adjusting the pitch and yaw attitude as a whole;

[0079] If not, the attitude of the main mirror of the second parallel light device 2 is adjusted so that the image of the second crosshair 5 falls in the center of the theodolite 6, and the fast alignment of the optical axis of the parallel light path is completed.

[0080] If yes, the pitch and yaw attitude of the second parallel light device 2 is adjusted as a whole until the image of the second crosshair 5 falls in the center of the theodolite 6, and the fast alignment of the optical axis of the parallel light path is completed.

[0081] The fast alignment method for the optical axis of the parallel light path provided by the embodiment can quickly complete the alignment of the parallel light paths at both ends with a small amount of measurement equipment, and can be used for the alignment of two parallel light tubes and the construction of a schlieren light path.

[0082] The embodiment also provides a fast alignment device for parallel light path optical axis, comprising an eight-line instrument 3, a first cross scale plate 4, a second cross scale plate 5, a theodolite 6 and a two-dimensional lifting platform 7. The eight-line instrument 3 is used for adjusting the first parallel light emitted by the first parallel light device 1 and the second parallel light emitted by the second parallel light device 2 to be aligned. The first cross scale plate 4 is used for being installed at the focal plane of the first parallel light device 1 to be aligned. The second cross scale plate 5 is used for being installed at the focal plane of the second parallel light device 2 to be aligned. The theodolite 6 is used for being arranged between the first parallel light device 1 to be aligned and the second parallel light device 2 to be aligned, so as to display the images of the first cross scale plate 4 and the second cross scale plate 5 and the angle of the first parallel light and the second parallel light in the vertical direction. The two-dimensional lifting platform 7 is arranged at the bottom of the theodolite 6, and is used for adjusting the height of the theodolite 6. The device is simple, reliable and low in cost, and is used for the alignment method described above, so that the alignment effect is more accurate and the speed is faster.

[0083] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited to this. Any change or replacement within the technical scope disclosed by the present application should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for quickly aligning the optical axis of a parallel light path, for quickly aligning a first parallel light device and a second parallel light device, both of which include a primary mirror; It is characterized in that The following steps are involved: Step 1: The first parallel light device to be aligned (1) and the second parallel light device to be aligned (2) are positioned on the same plane, and the first parallel light emitted by the first parallel light device to be aligned (1) and the second parallel light emitted by the second parallel light device to be aligned (2) are adjusted to pass through the center; Step 2: placing a first cross-reticle plate (4) at the focal plane of the first parallel light device to be aligned (1), and placing a second cross-reticle plate (5) at the focal plane of the second parallel light device to be aligned (2); Step 3: placing a theodolite (6) in a leveling state between the first parallel light device to be aligned (1) and the second parallel light device to be aligned (2), and adjusting the theodolite (6) so that the image of the first cross-reticle plate (4) falls on the center of the theodolite (6); Step 4: Observe on the theodolite (6) whether the angle between the first parallel light and the vertical plane of the earth is 90°; If it is 90°, go to step 5; If it is not 90°, go to step 6; Step 5: Rotate the theodolite (6) horizontally by 180°, adjust the second parallel light device (2) to be aligned, so that the image of the second cross-reticle (5) falls on the center of the theodolite (6), and complete the rapid alignment of the optical axis of the parallel light path; Step 6: Rotate the theodolite (6) horizontally by 180°, change the vertical angle of the theodolite (6) to the supplementary angle of the first parallel light in the vertical direction, and adjust the second parallel light device (2) to be aligned so that the image of the second cross-reticle (5) falls on the center of the theodolite (6), thereby completing the rapid alignment of the optical axis of the parallel light path.

2. The method for rapid alignment of parallel optical axes according to claim 1, wherein: Step 1 includes: 1.

1. Placing an eight-line instrument (3) between a first parallel light device to be aligned (1) and a second parallel light device to be aligned (2); 1.

2. If the exit apertures of the parallel light paths of the first parallel light device to be aligned (1) and the second parallel light device to be aligned (2) are not the same, the cross laser line on one side of the eight-line instrument (3) is first aligned with the center of the mechanical frame of the exit aperture of the parallel light device to be aligned with the larger aperture, and then the parallel light device to be aligned with the smaller aperture is adjusted so that the center of the mechanical frame of the exit aperture is aligned with the cross laser line on the other side of the eight-line instrument (3); If the parallel light exit apertures of the first parallel light device to be aligned (1) and the second parallel light device to be aligned (2) are of the same size, the first parallel light device to be aligned (1) and the second parallel light device to be aligned (2) are adjusted respectively so that the first parallel light and the second parallel light emitted by the two devices respectively coincide with the cross laser lines on both sides of the eight-line instrument (3); Complete the penetration adjustment of the first parallel light and the second parallel light.

3. The method for rapid alignment of parallel optical axes according to claim 2, wherein: Step 5 is as follows: 5.

1. Rotate the theodolite (6) horizontally by 180° and observe whether the image of the second cross-reticle (5) falls on the center of the theodolite (6); If the image of the second cross-reticle (5) falls on the center of the theodolite (6), the rapid alignment of the optical axes of the parallel light paths is completed; If the image of the second cross-reticle (5) does not fall on the center of the theodolite (6), proceed to step 5.2; 5.

2. Observe whether the second parallel light device (2) to be aligned has the conditions for adjusting the pitch and yaw posture as a whole; If it is not available, adjust the posture of its main mirror so that the image of the second cross-reticle plate (5) falls on the center of the theodolite (6), completing the rapid alignment of the optical axis of the parallel light path; If so, the pitch and yaw postures of the second parallel light device (2) to be aligned are adjusted as a whole until the second cross-reticle plate (5) falls on the center of the theodolite (6), completing the rapid alignment of the optical axis of the parallel light path.

4. The method for rapid alignment of parallel optical axes according to claim 3, wherein: Step 6 is as follows: 6.

1. Rotate the theodolite (6) horizontally by 180°, change the vertical angle of the theodolite (6) to the supplementary angle of the first parallel light in the vertical direction, and observe whether the image of the second cross-reticle (5) falls on the center of the theodolite (6); If the image of the second cross-reticle (5) falls on the center of the theodolite (6), the rapid alignment of the optical axes of the parallel light paths is completed; If the image of the second cross-reticle (5) does not fall on the center of the theodolite (6), proceed to step 6.2; 6.

2. Observe whether the second parallel light device (2) to be aligned has the conditions for adjusting the pitch and yaw posture as a whole; If it is not available, adjust the posture of its main mirror so that the image of the second cross-reticle plate (5) falls on the center of the theodolite (6), completing the rapid alignment of the optical axis of the parallel light path; If so, the pitch and / or yaw posture of the second parallel light device (2) to be aligned is adjusted as a whole until the second cross-reticle plate (5) falls on the center of the theodolite (6), completing the rapid alignment of the optical axis of the parallel light path.

5. The method for rapid alignment of parallel optical axes according to any one of claims 1 to 4, characterized in that: Step 3 is as follows: A theodolite (6) in a leveling state and provided with a two-dimensional lifting platform (7) at the bottom is placed between a first parallel light device to be aligned (1) and a second parallel light device to be aligned (2). The theodolite (6) is adjusted by the two-dimensional lifting platform (7) so that the image of the first cross-reticle plate (4) falls on the center of the theodolite (6).

6. A device for quickly aligning the optical axes of parallel light paths, used to implement the method for quickly aligning the optical axes of parallel light paths according to any one of claims 1 to 5, characterized in that: It includes a first cross-reticle plate (4), a second cross-reticle plate (5) and a theodolite (6); The first cross-reticle plate (4) is used for being mounted at the focal plane of the first parallel light device (1) to be aligned; The second cross-reticle plate (5) is used for being mounted at the focal plane of the second parallel light device (2) to be aligned; The theodolite (6) is used to be arranged between the first parallel light device to be aligned (1) and the second parallel light device to be aligned (2) to display the images of the first cross-reticle plate (4) and the second cross-reticle plate (5) as well as the angles of the first parallel light and the second parallel light in the vertical direction.

7. The rapid alignment device for parallel optical paths and optical axes according to claim 6, characterized in that: Also included is the Eight Line Instrument (3); The eight-line instrument (3) is used for adjusting the first parallel light emitted by the first parallel light device (1) to be aligned and the second parallel light emitted by the second parallel light device (2) to be aligned.

8. The rapid alignment device for parallel optical paths and optical axes according to claim 6, characterized in that: Also includes a two-dimensional lifting platform (7); The two-dimensional lifting platform (7) is arranged at the bottom of the theodolite (6) and is used to adjust the height of the theodolite (6).

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