An optical through-axis alignment method

Abstract

The present application relates to the technical field of optical machine adjustment, and particularly relates to an optical through shaft adjustment method, comprising: establishing an adjustment reference; obtaining deviation data of a mirror frame center to be adjusted relative to a center of an inner focusing light pipe; obtaining a first position relationship of actual coordinates of the mirror frame center to be adjusted relative to theoretical coordinates, and obtaining a second position relationship of a second unit vector relative to a first unit vector; obtaining a position deviation amount of the mirror frame to be adjusted; and optical axis adjustment. The present application only needs to select a gasket with a corresponding thickness according to the position deviation amount of the mirror frame to be measured, so that optical through shaft adjustment is realized at one time, thereby improving the adjustment efficiency.

Description

Technical Field

[0001] This invention relates to the field of optomechanical assembly and adjustment technology, and specifically to an optical through-axis adjustment method. Background Technology

[0002] Optoelectronic products are complex optomechanical systems containing multiple optical components. To ensure product quality, it is necessary to ensure that the deviations between the positions of each optical component and their theoretical positions meet tolerance requirements. To ensure uniformity of the image and prevent situations where one side of the image is clear while the other side is blurry, the optical axis alignment process requires not only adjustment of the optical axis parallelism but also adjustment of the optical axis center position.

[0003] The optical axis adjustment is carried out using a disassembly plate fixture, such as... Figure 2 As shown, firstly, the reticle fixture is installed in the reference lens frame of the photoelectric product (1). The light emitted from the inner focusing tube (3) is reflected by the reticle fixture and returns to the inner focusing tube (3) to form a collimated image. The light generated by the light source illuminating the reticle fixture enters the inner focusing tube (3) to form a reticle image. By adjusting the translation, azimuth angle and pitch angle of the inner focusing tube (3), the collimated image deviation value and the reticle image deviation value are ensured to be no greater than 30". The assembly and adjustment reference is established. The reticle fixture is installed into the lens frame to be tested. The reticle fixture is measured using the inner focusing tube to obtain the center deviation value and angle deviation value of the lens frame to be tested. The position of the lens frame to be tested is adjusted using the adjusting shims until the center deviation value and angle deviation value of the lens frame to be tested meet the requirements.

[0004] The existing adjustment process requires repeated disassembly and reassembly to change the thickness of the adjustment shims, resulting in low assembly and adjustment efficiency.

[0005] Therefore, there is a need to provide an optical through-axis calibration method to solve the above problems. Summary of the Invention

[0006] This invention provides an optical through-axis adjustment method. It measures the deviation data of the center of the lens frame to be adjusted relative to the center of the internal focusing light tube in an optoelectronic product using a self-aligned internal focusing light tube. Then, it establishes a displacement deviation mapping between the actual and theoretical coordinates of the lens frame to be adjusted, and establishes an angular deviation mapping between the second unit vector of the line connecting the theoretical positions of the center points of the lens frame and the internal focusing light tube and the second unit vector of the same line. Based on the displacement deviation mapping, the angular deviation mapping, and the deviation data, the positional deviation of the lens frame to be adjusted is accurately determined. This allows for precise adjustment of the lens frame position based on the positional deviation, solving the problem of existing adjustment processes requiring repeated disassembly and reassembly to change the thickness of the adjustment shims, resulting in low assembly efficiency and high assembly stress. Over time, the release of assembly stress also leads to a decrease in optical axis accuracy.

[0007] The optical through-axis alignment method of the present invention adopts the following technical solution: including:

[0008] Based on the assembly and adjustment standards of optoelectronic products, the internal focusing tube is self-collimated;

[0009] Using the collimated internal focusing light tube, the deviation data of the center of the lens frame to be adjusted in the optoelectronic product relative to the center of the internal focusing light tube is measured.

[0010] Based on the theoretical and actual coordinates of the center point of the lens frame to be adjusted in the coordinate system of the inner focusing tube, obtain the first positional relationship between the actual coordinates of the center of the lens frame to be adjusted and the theoretical coordinates.

[0011] Define the theoretical position of the center point of the lens frame to be tested and the first unit vector of the line connecting the center point of the inner focusing tube; define the actual position of the center point of the lens frame to be tested and the second unit vector of the line connecting the center point of the inner focusing tube; and obtain the second positional relationship between the second unit vector and the first unit vector.

[0012] Based on the first positional relationship, the second positional relationship, and the deviation data of the center of the lens frame to be adjusted relative to the center of the internal focusing tube in the photoelectric product measured by the collimated internal focusing tube, the positional deviation of the lens frame to be adjusted is obtained.

[0013] Adjust the lens frame according to the positional deviation of the lens frame until the center line of the lens frame coincides with the optical axis of the inner focusing tube.

[0014] The deviation data includes angular deviation and displacement deviation.

[0015] Preferably, the displacement deviation of the center of the frame to be adjusted includes pitch displacement deviation and azimuth displacement deviation, and the angular deviation of the center of the frame to be adjusted includes pitch angle deviation and azimuth angle deviation; wherein, the X-axis in the coordinate system of the inner focusing tube is along the beam direction of the inner focusing tube; the azimuth displacement deviation is: the vertical distance from the Y-axis to the projection point of the actual coordinate point of the center of the frame to be adjusted on the ΔYOZ plane in the coordinate system of the inner focusing tube; the pitch displacement deviation is: the vertical distance from the Z-axis to the projection point of the actual coordinate point of the center of the frame to be adjusted on the ΔYOZ plane in the coordinate system of the inner focusing tube.

[0016] The pitch angle deviation is the angle between the projection of the second unit vector onto the ΔXOY plane of the inner focusing tube coordinate system and the X-axis; the azimuth angle deviation is the angle between the projection of the second unit vector onto the ΔXOZ plane of the inner focusing tube coordinate system and the Z-axis.

[0017] Preferably, the self-collimation step for the internal focusing light tube is as follows: install the reticle in the mounting reference hole of the optoelectronic product; and adjust the position and angle of the internal focusing light tube according to the emitted beam of the internal focusing light tube and the returned beam returned through the reticle; until the optical axis of the internal focusing light tube coincides with the axis of the mounting reference hole, thus completing the self-collimation of the internal focusing light tube.

[0018] Preferably, the steps of adjusting the position and angle of the internal focusing tube include: translating the internal focusing tube to adjust its position; and adjusting the azimuth and pitch angles of the internal focusing tube through its adjustment mechanism.

[0019] Preferably, the step of obtaining the first positional relationship between the actual coordinates of the center of the frame to be adjusted and the theoretical coordinates is as follows:

[0020]

[0021] In the formula, N2[XYZ 1] represents the actual coordinates of the center of the frame to be adjusted;

[0022] L represents the distance between the center point of the lens frame to be adjusted and the center point of the internal focusing tube of the optoelectronic product;

[0023] δy represents the angular deviation of the actual coordinates of the center of the frame to be adjusted relative to the theoretical coordinates about the Y-axis;

[0024] δz represents the angular deviation of the actual coordinates of the center of the frame to be adjusted relative to the theoretical coordinates about the Z-axis;

[0025] Δy represents the displacement deviation of the actual coordinates of the center of the frame to be adjusted relative to the theoretical coordinates about the Y-axis.

[0026] Δz represents the displacement deviation of the actual coordinates of the center of the frame to be adjusted relative to the theoretical coordinates about the Z-axis.

[0027] Preferably, the step of obtaining the second positional relationship of the second unit vector relative to the second unit vector is as follows:

[0028]

[0029] In the formula, M2[XYZ 1] represents the second unit vector of the line connecting the actual position of the center point of the lens frame to be measured and the center point of the inner focusing tube;

[0030] δy represents the angular deviation of the actual coordinates of the center of the frame to be adjusted relative to the theoretical coordinates about the Y-axis;

[0031] δz represents the angular deviation of the actual coordinates of the center of the frame to be adjusted relative to the theoretical coordinates about the Z-axis.

[0032] Preferably, the step of obtaining the positional deviation of the frame to be adjusted is as follows:

[0033]

[0034] In the formula, The vertical distance from the Y-axis to the projection point of the actual coordinate point of the center of the frame to be adjusted on the ΔYOZ plane in the coordinate system of the inner focusing tube, that is, the azimuth displacement deviation measured by the inner focusing tube.

[0035] The vertical distance from the Z-axis to the projection point of the actual coordinate point of the center of the frame to be adjusted on the ΔYOZ plane in the coordinate system of the inner focusing tube, that is, the pitch displacement deviation measured by the inner focusing tube.

[0036] ω(1) represents the angle between the projection of the second unit vector onto the ΔXOY plane of the inner focusing tube coordinate system and the X-axis, i.e. the pitch angle deviation measured by the inner focusing tube.

[0037] ω(2) represents the angle between the projection of the second unit vector onto the ΔXOZ plane of the inner focusing tube coordinate system and the Z-axis, i.e., the azimuth angle deviation measured by the inner focusing tube.

[0038] L represents the distance between the center point of the lens frame to be adjusted and the center point of the internal focusing tube of the optoelectronic product;

[0039] δy represents the angular deviation of the actual coordinates of the center of the frame to be adjusted relative to the theoretical coordinates about the Y-axis;

[0040] δz represents the angular deviation of the actual coordinates of the center of the frame to be adjusted relative to the theoretical coordinates about the Z-axis;

[0041] Δy represents the displacement deviation of the actual coordinates of the center of the frame to be adjusted relative to the theoretical coordinates about the Y-axis.

[0042] Δz represents the displacement deviation of the actual coordinates of the center of the frame to be adjusted relative to the theoretical coordinates about the Z-axis.

[0043] The beneficial effects of this invention are:

[0044] The deviation data of the center of the lens frame to be adjusted relative to the center of the internal focusing light tube in the optoelectronic product is measured by measuring the self-aligned internal focusing light tube. Then, a displacement deviation mapping between the actual coordinates and theoretical coordinates of the lens frame to be adjusted is established. An angular deviation mapping between the second unit vector of the line connecting the actual position of the center point of the lens frame to be measured and the center point of the internal focusing light tube, and the first unit vector of the line connecting the theoretical coordinates of the center point of the lens frame to be measured and the center point of the internal focusing light tube is established. Based on the displacement deviation mapping, the angular deviation mapping, and the deviation data, the position deviation of the lens frame to be measured is accurately determined. Thus, the position of the lens frame to be adjusted is precisely adjusted according to the position deviation to ensure that the center line of the lens frame to be adjusted coincides with the optical axis of the internal focusing light tube, thus meeting the optical through-axis requirements. That is, this invention only requires selecting a shim of appropriate thickness according to the position deviation of the lens frame to be measured, thereby realizing optical through-axis adjustment in one go, thereby improving assembly and adjustment efficiency. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 This is a flowchart of an optical through-axis calibration method according to the present invention;

[0047] Figure 2 This is a schematic diagram of the optical through-axis environment setup for the present invention;

[0048] Figure 3 A measurement schematic diagram is established for the optical through-axis reference of this invention;

[0049] Figure 4 This is a schematic diagram of the center deviation measurement of the present invention;

[0050] Figure 5 This is a schematic diagram of the angle deviation measurement of the present invention;

[0051] Figure 6 This is a schematic diagram illustrating the position deviation analysis of the present invention.

[0052] In the diagram: 1. Optoelectronic product; 2. Assembly tooling; 3. Internal focusing light tube; 4. Optical platform. Detailed Implementation

[0053] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0054] An embodiment of the optical through-axis alignment method of the present invention, such as... Figure 1 As shown, it includes:

[0055] S1. Establish assembly and adjustment standards;

[0056] Specifically, such as Figure 3 As shown, the internal focusing tube is self-collimated according to the mounting reference of the optoelectronic product; the reticle is installed in the mounting reference hole of the optoelectronic product; and the position and angle of the internal focusing tube are adjusted according to the outgoing beam of the internal focusing tube and the returning beam returned through the reticle; until the optical axis of the internal focusing tube coincides with the axis of the mounting reference hole, the self-collimation of the internal focusing tube is completed.

[0057] S2. Obtain the deviation data of the center of the lens frame to be adjusted relative to the center of the inner focusing tube;

[0058] Specifically, using the collimated inner focusing tube, the deviation data of the center of the lens frame to be adjusted in the optoelectronic product relative to the center of the inner focusing tube is measured. In this embodiment, the reticle is installed in the mounting reference hole of the optoelectronic product. The position and angle of the inner focusing tube are adjusted according to the emitted beam of the inner focusing tube and the returned beam returned through the reticle, that is, the inner focusing tube is translated to adjust its position. The azimuth and pitch angles of the inner focusing tube are adjusted through the adjustment mechanism of the inner focusing tube until the optical axis of the inner focusing tube coincides with the axis of the mounting reference hole, thus completing the self-collimation of the inner focusing tube. The deviation data are: angular deviation and center displacement deviation.

[0059] S3. Obtain the first positional relationship between the actual coordinates of the center of the frame to be adjusted and the theoretical coordinates, and obtain the second positional relationship between the second unit vector and the first unit vector.

[0060] Specifically, based on the theoretical and actual coordinates of the center point of the lens frame to be adjusted in the coordinate system of the inner focusing tube, the first positional relationship between the actual coordinates of the center of the lens frame to be adjusted and the theoretical coordinates is obtained; the first unit vector of the line connecting the theoretical position of the center point of the lens frame to be tested and the center point of the inner focusing tube is defined, and the second unit vector of the line connecting the actual position of the center point of the lens frame to be tested and the center point of the inner focusing tube is defined, and the second positional relationship between the second unit vector and the first unit vector is obtained.

[0061] S4. Obtain the positional deviation of the frame to be adjusted;

[0062] Specifically, based on the first positional relationship, the second positional relationship, and the deviation data of the center of the lens frame to be adjusted relative to the center of the internal focusing light tube in the photoelectric product measured after collimation, the positional deviation of the lens frame to be adjusted is obtained.

[0063] S5, Optical axis adjustment;

[0064] Specifically, adjust the lens frame according to the positional deviation until the center line of the lens frame coincides with the optical axis of the internal focusing tube.

[0065] Furthermore, Figure 2 An existing calibration device includes: an adjustment fixture 2, an internal focusing light tube 3, and an optical platform 4. An optoelectronic product 1 is mounted on the adjustment fixture 2. Specifically, this embodiment combines... Figure 2 The calibration device performs specific adjustments in steps S2 to S4 of the present invention as follows:

[0066] 1) Establish such Figure 2 The coordinate system of the internal focusing light tube 3 is shown, wherein the X-axis direction of the coordinate system of the internal focusing light tube 3 is the reverse direction of the beam of the internal focusing light tube 3.

[0067] 2) The assembly and adjustment fixture 2 and the optical platform 4 are fixed in place. Therefore, in this embodiment, it is assumed that the assembly and adjustment process is not affected by the positional changes of the assembly and adjustment fixture 2 and the optical platform 4.

[0068] 3) Establish displacement deviation mapping;

[0069] Specifically, such as Figure 4 and Figure 6 As shown, when the optoelectronic product 1 is installed on the optical platform 4, due to the existence of machining errors, the center of the lens frame to be tested of the optoelectronic product 1 does not coincide with the theoretical position. The theoretical center coordinates of the lens frame to be tested are defined as N1[XYZ 1], and the actual center coordinates of the lens frame to be tested are defined as N2[XYZ 1]. Therefore, compared with N1[XY Z 1], N2[XYZ 1] has the following positional relationships: X-axis displacement deviation Δx, Y-axis displacement deviation Δy, Z-axis displacement deviation Δz, and X-axis angular deviation δx, Y-axis angular deviation δy, and Z-axis angular deviation δz.

[0070] Let L be the distance between the center point of the frame of the optoelectronic product 1 and the center point of the inner focusing tube 3. Then the theoretical coordinates of N1[XYZ1] are: N1[XYZ1]=[L 0 0 A] TFrom the measurement method of center deviation, it can be seen that the center deviation is not affected by Δx and δx. The translation transformation matrix is ​​defined as E(Δx) / E(Δy) / E(Δz), and the rotation transformation matrix is ​​defined as θ(δx) / θ(δy) / θ(δz). Therefore, the first positional relationship between N2[XYZ 1] and N1[XYZ 1] satisfies:

[0071]

[0072] In the formula, N2[XYZ 1] represents the actual coordinates of the center of the frame to be adjusted;

[0073] L represents the distance between the center point of the lens frame to be adjusted and the center point of the internal focusing tube of the optoelectronic product;

[0074] δy represents the angular deviation of the actual coordinates of the center of the frame to be adjusted relative to the theoretical coordinates about the Y-axis;

[0075] δz represents the angular deviation of the actual coordinates of the center of the frame to be adjusted relative to the theoretical coordinates about the Z-axis;

[0076] Δy represents the displacement deviation of the actual coordinates of the center of the frame to be adjusted relative to the theoretical coordinates about the Y-axis.

[0077] Δz represents the displacement deviation of the actual coordinates of the center of the frame to be adjusted relative to the theoretical coordinates about the Z-axis.

[0078] 4) Establish an angle deviation mapping; specifically, such as... Figure 5 and Figure 6 As shown, when the optoelectronic product 1 is mounted on the optical platform 4, due to machining errors, the center of the test frame of the optoelectronic product 1 does not coincide with the theoretical position. The unit vector of the line connecting the theoretical position of the center point of the test frame of the optoelectronic product 1 and the center point of the inner focusing light tube 3 is defined as M1[XYZ1], and the unit vector of the line connecting the theoretical position of the center point of the test frame of the optoelectronic product 1 and the center point of the inner focusing light tube 3 is defined as M2[XYZ1]. Therefore, as... Figure 6 As shown, compared with M1[XYZ 1], M2[XYZ 1] has X-axis displacement deviation Δx, Y-axis displacement deviation Δy, Z-axis displacement deviation Δz, and X-axis angular deviation δx, Y-axis angular deviation δy, and Z-axis angular deviation δz.

[0079] As can be seen from the measurement method of angular deviation, angular deviation is not affected by Δx / Δy / Δz / δx. M1[XYZ 1] is the initial unit vector [1 0 0 1]. Therefore, the second positional relationship between M2[XYZ 1] and M1[XYZ 1] satisfies:

[0080]

[0081] In the formula, M2[XYZ 1] represents the second unit vector of the line connecting the actual position of the center point of the lens frame to be measured and the center point of the inner focusing tube;

[0082] δy represents the angular deviation of the actual coordinates of the center of the frame to be adjusted relative to the theoretical coordinates about the Y-axis;

[0083] δz represents the angular deviation of the actual coordinates of the center of the frame to be adjusted relative to the theoretical coordinates about the Z-axis.

[0084] 5) Define the azimuth displacement deviation reading in the deviation data obtained by measuring the internal focusing optical tube 3 as: Pitch displacement deviation reading Right now The vertical distance from the Y-axis to the projection point of the actual coordinate point of the center of the frame to be adjusted onto the ΔYOZ plane in the coordinate system of the inner focusing tube. The vertical distance from the Z-axis to the projection point of the actual coordinate point of the center of the frame to be adjusted on the ΔYOZ plane in the inner focusing tube coordinate system; the azimuth reading of the angular deviation is ω(1), where ω(1) represents the angle between the second unit vector and the X-axis in the ΔXOY plane of the inner focusing tube coordinate system; the pitch reading of the angular deviation is ω(2), where ω(2) represents the angle between the second unit vector and the Z-axis in the ΔXOZ plane of the inner focusing tube coordinate system. Therefore:

[0085]

[0086] In the formula, The vertical distance from the Y-axis to the projection point of the actual coordinate point of the center of the frame to be adjusted on the ΔYOZ plane in the coordinate system of the inner focusing tube, that is, the azimuth displacement deviation measured by the inner focusing tube.

[0087] (2) The vertical distance between the actual coordinate point of the center of the frame to be adjusted and the projection point on the ΔYOZ plane in the coordinate system of the inner focusing tube and the Z-axis, that is, the pitch displacement deviation measured by the inner focusing tube.

[0088] ω(1) represents the angle between the projection of the second unit vector onto the ΔXOY plane of the inner focusing tube coordinate system and the X-axis, i.e. the pitch angle deviation measured by the inner focusing tube.

[0089] ω(2) represents the angle between the projection of the second unit vector onto the ΔXOZ plane of the inner focusing tube coordinate system and the Z-axis, i.e., the azimuth angle deviation measured by the inner focusing tube.

[0090] L represents the distance between the center point of the lens frame to be adjusted and the center point of the internal focusing tube of the optoelectronic product;

[0091] δy represents the angular deviation of the actual coordinates of the center of the frame to be adjusted relative to the theoretical coordinates about the Y-axis;

[0092] δz represents the angular deviation of the actual coordinates of the center of the frame to be adjusted relative to the theoretical coordinates about the Z-axis;

[0093] Δy represents the displacement deviation of the actual coordinates of the center of the frame to be adjusted relative to the theoretical coordinates about the Y-axis.

[0094] Δz represents the displacement deviation of the actual coordinates of the center of the frame to be adjusted relative to the theoretical coordinates about the Z-axis.

[0095] It should be noted that: / ω(1) / ω(2) are both measurement data of the inner focusing light tube 3, and L is a known value. Therefore, δz, Δz, δy, and Δy can be solved. Since δx and Δx have no effect on the optical cross-axis result, this embodiment considers that the position deviation of the optical cross-axis frame to be adjusted has been calculated. At this time, the frame to be adjusted can be adjusted according to the position deviation of the frame to be adjusted until the center line of the frame to be adjusted coincides with the optical axis of the inner focusing light tube, thus completing the optical cross-axis adjustment.

[0096] In summary, the optical through-axis calibration method provided by this invention measures the deviation data of the center of the lens frame to be adjusted relative to the center of the internal focusing light tube in the optoelectronic product after self-alignment. Then, a displacement deviation mapping between the actual coordinates and theoretical coordinates of the lens frame to be adjusted is established. Furthermore, an angular deviation mapping is established between the second unit vector of the line connecting the actual position of the center point of the lens frame to be measured and the center point of the internal focusing light tube, and the first unit vector of the line connecting the theoretical coordinates of the center point of the lens frame to be measured and the center point of the internal focusing light tube. Based on the displacement deviation mapping, the angular deviation mapping, and the deviation data, the positional deviation of the lens frame to be measured is accurately determined. Therefore, the position of the lens frame to be adjusted is precisely adjusted according to the positional deviation to ensure that the centerline of the lens frame to be adjusted coincides with the optical axis of the internal focusing light tube, thus meeting the requirements of optical through-axis calibration. In other words, this invention only requires selecting a shim of appropriate thickness according to the positional deviation of the lens frame to be measured, thereby achieving optical through-axis calibration in one step and improving assembly efficiency.

[0097] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An optical through-axis alignment method, characterized in that, include: Based on the assembly and adjustment standards of optoelectronic products, the internal focusing tube is self-collimated; Using the collimated internal focusing light tube, the deviation data of the center of the lens frame to be adjusted in the optoelectronic product relative to the center of the internal focusing light tube is measured. Based on the theoretical and actual coordinates of the center point of the lens frame to be adjusted in the coordinate system of the inner focusing tube, obtain the first positional relationship between the actual coordinates of the center of the lens frame to be adjusted and the theoretical coordinates. Define the theoretical position of the center point of the lens frame to be tested and the first unit vector of the line connecting the center point of the inner focusing tube; define the actual position of the center point of the lens frame to be tested and the second unit vector of the line connecting the center point of the inner focusing tube; and obtain the second positional relationship between the second unit vector and the first unit vector. Based on the first positional relationship, the second positional relationship, and the deviation data of the center of the lens frame to be adjusted relative to the center of the internal focusing tube in the photoelectric product measured by the collimated internal focusing tube, the positional deviation of the lens frame to be adjusted is obtained. Adjust the lens frame according to the positional deviation of the lens frame until the center line of the lens frame coincides with the optical axis of the inner focusing tube. The deviation data includes angular deviation and displacement deviation.

2. The optical through-axis alignment method according to claim 1, characterized in that, The displacement deviation of the center of the frame to be adjusted includes pitch displacement deviation and azimuth displacement deviation, and the angular deviation of the center of the frame to be adjusted includes pitch angle deviation and azimuth angle deviation. In this system, the X-axis of the internal focusing light tube coordinate system is along the beam direction of the internal focusing light tube; the azimuth displacement deviation is the vertical distance from the Y-axis to the projection point of the actual coordinate point of the center of the lens frame to be adjusted on the ΔYOZ plane in the internal focusing light tube coordinate system; the pitch displacement deviation is the vertical distance from the Z-axis to the projection point of the actual coordinate point of the center of the lens frame to be adjusted on the ΔYOZ plane in the internal focusing light tube coordinate system. The pitch angle deviation is the angle between the projection of the second unit vector onto the ΔXOY plane of the inner focusing tube coordinate system and the X-axis; the azimuth angle deviation is the angle between the projection of the second unit vector onto the ΔXOZ plane of the inner focusing tube coordinate system and the Z-axis.

3. The optical through-axis alignment method according to claim 1, characterized in that, The steps for autocollimating the internal focusing optical tube are as follows: Install the reticle in the mounting reference hole of the optoelectronic product; The position and angle of the internal focusing tube are adjusted according to the output beam of the internal focusing tube and the return beam that returns through the reticle. The self-collimation of the internal focusing tube is completed when the optical axis of the internal focusing tube coincides with the axis of the mounting reference hole.

4. The optical through-axis alignment method according to claim 3, characterized in that, The steps for adjusting the position and angle of the internal focusing tube include: The inner focusing tube is moved horizontally to adjust its position. The azimuth and pitch angles of the internal focusing tube can be adjusted using the adjustment mechanism of the internal focusing tube.

5. The optical through-axis alignment method according to claim 1, characterized in that, The steps to obtain the first positional relationship between the actual coordinates of the center of the frame to be adjusted and the theoretical coordinates are as follows: In the formula, N2[XYZ 1] represents the actual coordinates of the center of the frame to be adjusted; L represents the distance between the center point of the lens frame to be adjusted and the center point of the internal focusing tube of the optoelectronic product; δy represents the angular deviation of the actual coordinates of the center of the frame to be adjusted relative to the theoretical coordinates about the Y-axis; δz represents the angular deviation of the actual coordinates of the center of the frame to be adjusted relative to the theoretical coordinates about the Z-axis; Δy represents the displacement deviation of the actual coordinates of the center of the frame to be adjusted relative to the theoretical coordinates about the Y-axis. Δz represents the displacement deviation of the actual coordinates of the center of the frame to be adjusted relative to the theoretical coordinates about the Z-axis.

6. The optical through-axis alignment method according to claim 1, characterized in that, The steps to obtain the second positional relationship of the second unit vector relative to the first unit vector are as follows: In the formula, M2[XYZ 1] represents the second unit vector of the line connecting the actual position of the center point of the lens frame to be measured and the center point of the inner focusing tube; δy represents the angular deviation of the actual coordinates of the center of the frame to be adjusted relative to the theoretical coordinates about the Y-axis; δz represents the angular deviation of the actual coordinates of the center of the frame to be adjusted relative to the theoretical coordinates about the Z-axis.

7. The optical through-axis alignment method according to claim 1, characterized in that, The steps to obtain the positional deviation of the frame to be adjusted are as follows: In the formula, The vertical distance from the Y-axis to the projection point of the actual coordinate point of the center of the frame to be adjusted on the ΔYOZ plane in the coordinate system of the inner focusing tube, that is, the azimuth displacement deviation measured by the inner focusing tube. The vertical distance from the Z-axis to the projection point of the actual coordinate point of the center of the frame to be adjusted on the ΔYOZ plane in the coordinate system of the inner focusing tube, that is, the pitch displacement deviation measured by the inner focusing tube. ω(1) represents the angle between the projection of the second unit vector onto the ΔXOY plane of the inner focusing tube coordinate system and the X-axis, i.e. the pitch angle deviation measured by the inner focusing tube. ω(2) represents the angle between the projection of the second unit vector onto the ΔXOZ plane of the inner focusing tube coordinate system and the Z-axis, i.e., the azimuth angle deviation measured by the inner focusing tube. L represents the distance between the center point of the lens frame to be adjusted and the center point of the internal focusing tube of the optoelectronic product; δy represents the angular deviation of the actual coordinates of the center of the frame to be adjusted relative to the theoretical coordinates about the Y-axis; δz represents the angular deviation of the actual coordinates of the center of the frame to be adjusted relative to the theoretical coordinates about the Z-axis; Δy represents the displacement deviation of the actual coordinates of the center of the frame to be adjusted relative to the theoretical coordinates about the Y-axis. Δz represents the displacement deviation of the actual coordinates of the center of the frame to be adjusted relative to the theoretical coordinates about the Z-axis.

Images