Optical collimation adjusting device
By setting diffraction elements in front of the light source emitter and opening a light-transmitting hole, combined with the contrast grid on the observation screen, the problem of large collimation alignment error in optical system debugging is solved, and the alignment efficiency and accuracy of optical components are improved .
Patent Information
- Application Number
- CN202421158436.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-24
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-24
AI Technical Summary
In the application of laser technology, during the debugging and calibration of optical systems, the prior art is difficult to effectively reduce the error of optical components collimation timing, especially in the case of multi-component systems and curvature surfaces, resulting in increased measurement errors and technical indicators decline.
By setting diffraction elements in front of the light source emitter, opening ring, triangle or rectangular light-transmitting holes, and combining with the contrast grid on the observation screen, the observer can facilitate comparison between whether the reflected image and the emission position overlap, thereby improving the alignment of the optical element. Correct efficiency.
The error of collimation alignment of optical elements is reduced, the alignment efficiency of optical elements is improved, the power requirement of light sources is reduced, the interference to operators is reduced, and the debugging accuracy of curvature surface elements is enhanced.
Smart Images
Figure CN222259736U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of laser calibration, and in particular relates to an optical collimation adjustment device. Background Art
[0002] In many laser technology applications, the target characteristics are analyzed and measured by emitting laser to the target and receiving and analyzing its laser echo, such as solid-state lasers, laser rangefinders, laser radar equipment, etc. During assembly, it is necessary to ensure that the transmitting optical axis and the receiving optical axis are parallel to each other. If they are not consistent, it will cause problems such as insufficient focusing ability of the receiving optical system, increased measurement errors of the equipment, and reduced technical indicators.
[0003] The common method for debugging and calibrating optical systems is to use a point light source to compare the reflected image of the component interface with the emission position of the point light source when passing through the optical component to see if they coincide (or form a certain positional relationship) to adjust the plane position of the component. The light intensity of the point light source is concentrated, and there will be certain visual interference during observation. For multi-component systems, a higher-power light source is required to ensure debugging, but the light source will become glaring accordingly, increasing the interference to the operator. When the surface of the component has a certain curvature, insufficient debugging experience will easily cause accumulated errors, affecting the subsequent alignment and debugging of components. Utility Model Content
[0004] In view of the above-mentioned deficiencies, the utility model provides an optical collimation adjustment device, which arranges a diffraction element in front of a light source emitter and opens annular, triangular or rectangular light-transmitting holes on the diffraction element to facilitate an observer to compare whether the reflected image on the observation screen coincides with the emission position image of the light source, thereby reducing the error in the collimation and alignment of the optical element and improving the alignment efficiency of the optical element.
[0005] The utility model is realized by the following technical solutions:
[0006] An optical collimation adjustment device includes a coaxially arranged light source emitter, a diffraction element, a parallel collimator, and an observation screen. The light source emitter can emit red light and can adjust the light intensity. The diffraction element is provided with a light-transmitting hole, which has a variety of shapes. The observation screen is prepared by screen printing, and a contrast grid is engraved on the observation screen. The light-transmitting holes of different shapes are used to achieve shape comparison of the projected light, so that the observer can compare whether the reflected image on the observation screen coincides with the emission position image of the light source, thereby improving the collimation and alignment efficiency of the optical element.
[0007] Furthermore, the light-transmitting hole is an annular hole, which is convenient for comparing whether the reflected image coincides with the emission position of the light source, thereby improving the collimation adjustment efficiency of the optical element. The diffraction element includes a main plate body and a shielding plate, and the main plate body and the shielding plate are connected by a fixing plate to realize the suspension and fixation of the shielding plate.
[0008] Furthermore, the thickness of the shielding plate is smaller than the thickness of the main plate body, which reduces the weight of the shielding plate and facilitates hanging and fixing the shielding plate.
[0009] Furthermore, a threaded groove is provided on the main disk body, a through hole is provided on the fixing plate, and a fastening bolt passes through the through hole and is screwed into the threaded groove to realize a threaded connection between the fixing plate and the main disk, thereby facilitating the disassembly and assembly of the shielding disk.
[0010] Furthermore, a receiving groove for receiving the fixing plate is provided on the main plate body, and the depth of the receiving groove is consistent with the thickness of the fixing plate.
[0011] Furthermore, a positioning column is protruded from the center of the shielding disk, the main disk body is fixedly connected to the positioning column of the shielding disk, a rotating pointer is sleeved on the positioning column, the rotating pointer is sleeved and installed on the positioning column and can rotate relative to the axis of the positioning column, and the length of the rotating pointer is greater than the outer diameter of the annular hole. A fixed plate and a rotating pointer that can block the annular hole are provided to facilitate accurate and rapid alignment of the reflected image on the observation screen and the emission position image of the light source to see if they coincide.
[0012] Furthermore, an annular groove is provided on the main plate body, an annular magnetic part is laid in the annular groove, an arc-shaped magnetic part cooperating with the annular magnetic part is fixedly mounted on the rotating pointer, the arc-shaped magnetic part and the annular magnetic part can be attracted to each other, and the arc-shaped magnetic part can slide along the annular groove, so as to realize the magnetic fixation of the rotating pointer and facilitate the adjustment of the rotation angle of the rotating pointer.
[0013] Furthermore, an annular scale is engraved on the main disk body, and the rotating pointer points to the annular scale to achieve precise adjustment of the rotation angle of the rotating pointer. The side wall of the annular slide is coated with a Teflon coating. The Teflon coating has a low friction coefficient. Coating the side wall of the annular slide with the Teflon coating helps to reduce the sliding resistance when the arc-shaped magnetic part slides relative to the annular slide.
[0014] Furthermore, an annular light-transmitting slit is provided on the observation screen, and the annular light-transmitting slit cooperates with the annular hole to facilitate the red light emitted by the light source emitter to pass through the observation screen, and to facilitate comparison of the position and size relationship between the annular light-transmitting slit and the reflected image.
[0015] Furthermore, the light-transmitting hole is a triangular hole or a rectangular hole, which realizes the collimation and alignment of the optical element in a specific scene. Compared with a point light source, the use of a triangular hole or a rectangular hole can facilitate the observer to compare the relative position and size relationship of the reflected image and the direct image on the observation screen.
[0016] Beneficial effects of the utility model:
[0017] By arranging a diffraction element in front of the light source emitter and opening annular, triangular or rectangular light-transmitting holes on the diffraction element, it is convenient for the observer to compare whether the reflected image on the observation screen coincides with the emission position image of the light source, thereby reducing the error in the alignment of the optical element and improving the alignment efficiency of the optical element. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 A connection diagram for illustrating a schematic implementation of an optical collimation adjustment device in the utility model;
[0019] Figure 2 A schematic structural diagram for illustrating a schematic implementation of a diffraction element of an optical collimation adjustment device in the utility model;
[0020] Figure 3 To illustrate Figure 2 A partial enlarged schematic diagram in the middle;
[0021] Figure 4 To illustrate Figure 2 A partial enlarged schematic diagram of point B in the middle.
[0022] List of parts and reference numerals:
[0023] 1. Light source transmitter; 2. Diffraction element; 21. Light-transmitting hole; 22. Annular hole; 23. Main disk body; 231. Accommodating groove; 232. Annular slide groove; 233. Annular scale; 24. Shielding disk; 241. Positioning column; 25. Fixing plate; 26. Fastening bolt; 27. Rotating pointer; 28. Arc-shaped magnetic part; 3. Parallel collimator; 4. Observation screen. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0025] It should be noted that the directional terms such as left, right, up, down, front and back in the embodiments of the present invention are merely relative concepts or are based on the normal use state of the product, that is, the direction of movement of the product, and should not be considered as limiting.
[0026] In addition, it should be noted that the dynamic terms such as "relative motion" mentioned in the embodiments of the present invention are not only changes in position, but also include movements such as rotation and rolling where there is no relative change in position but a change in state.
[0027] Finally, it should be noted that when a component is referred to as being "located" or "set on" another component, it can be on the other component or there can be an intermediate component at the same time. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or there can be an intermediate component at the same time.
[0028] like Figures 1 to 4 An optical collimation adjustment device is shown, comprising a coaxially arranged light source emitter 1, a diffraction element 2, a parallel collimator 3 and an observation screen 4. The light source emitter 1 can emit red light and can adjust the light intensity. The diffraction element 2 is provided with a light-transmitting hole 21, and the light-transmitting hole 21 has a variety of shapes. The observation screen 4 is prepared by screen printing, and a contrast grid is engraved on the observation screen 4. The light-transmitting holes 21 of different shapes are used to achieve shape comparison of the projected light, so that the observer can compare whether the reflected image on the observation screen 4 coincides with the emission position image of the light source, thereby improving the collimation and alignment efficiency of the optical element.
[0029] In one embodiment, first, the light source emitter 1 emits red light toward the diffraction element 2, and the red light reaches the optical element via the light-transmitting hole 21 of the diffraction element 2, the parallel collimator 3 and the observation screen 4 in sequence, and the optical element reflects the red light to the observation screen 4. The collimation of the optical element is determined by comparing the position and size of the primary image when the red light first passes through the observation screen 4 with the reflected image reflected by the optical element to the observation screen 4. The emission power of the light source emitter 1 is adjustable to facilitate the adjustment of red light of different intensities. According to the specific working environment of the optical element, the appropriate emission power is selected to facilitate the formation of a relatively easy-to-observe reflected image on the observation screen 4. Providing multiple types of light-transmitting holes 21 is more helpful for observers to observe and compare compared with point light sources, and improves the efficiency of adjusting the collimation of the optical element.
[0030] The parallel collimator 3 is an optical element used for input and output of optical fiber communication optical devices. Its structure is very simple. The divergent light transmitted from the optical fiber is converted into parallel light (Gaussian beam) through a front convex lens. Its function is to make the light coupled into the required optical element with maximum efficiency or to receive the optical signal with maximum efficiency.
[0031] Preferably, the light-transmitting hole 21 is an annular hole 22, which is convenient for comparing whether the reflected image coincides with the emission position of the light source, thereby improving the collimation adjustment efficiency of the optical element. The diffraction element 2 includes a main plate body 23 and a shielding plate 24, and the main plate body 23 and the shielding plate 24 are connected by a fixing plate 25 to achieve suspension and fixation of the shielding plate 24.
[0032] In one embodiment, a circular ring-shaped light source that has been parallel collimated is used as an indicator light source during debugging. In this way, the intensity distribution of the indicator light is evenly dispersed, and increasing the power will not cause interference to the operator. When the light source returns or passes, the comparison ring is observed to see whether it overlaps or the response deviation is accurate to determine the relative position of the reflected image (transmitted image) and the emitted light source. In particular, for components with a certain curvature on the surface, the distortion state of the circular light can be used to quickly analyze the reasonable position of the component and predict the working status.
[0033] Preferably, the thickness of the shielding plate 24 is smaller than the thickness of the main plate body 23, so as to reduce the weight of the shielding plate 24 and facilitate hanging and fixing the shielding plate 24.
[0034] Preferably, a threaded groove is provided on the main disk body 23, a through hole is provided on the fixing plate 25, and the fastening bolt 26 passes through the through hole and is screwed into the threaded groove to realize a threaded connection between the fixing plate 25 and the main disk, thereby facilitating the disassembly and assembly of the shielding disk 24.
[0035] Preferably, the main plate body 23 is further provided with a receiving groove 231 for receiving the fixing plate 25 , and the depth of the receiving groove 231 is consistent with the thickness of the fixing plate 25 .
[0036] Preferably, a positioning post 241 protrudes from the center of the shielding disk 24, the main disk body 23 is fixedly connected to the positioning post 241 of the shielding disk 24, a rotating pointer 27 is sleeved on the positioning post 241, the rotating pointer 27 is sleeved and installed on the positioning post 241 and can rotate relative to the axis of the positioning post 241, and the length of the rotating pointer 27 is greater than the outer diameter of the annular hole 22. The fixed plate 25 and the rotating pointer 27 that can block the annular hole 22 are provided to facilitate accurate and rapid alignment of the reflected image on the observation screen 4 and whether the emission position image of the light source coincides.
[0037] In one embodiment, by providing the rotating pointer 27 and the fixed plate 25 , the relative position of the reflected image and the emitting light source can be easily determined according to the angle between the rotating pointer 27 and the fixed plate 25 .
[0038] Preferably, an annular groove 232 is provided on the main plate body 23, an annular magnetic piece is laid in the annular groove 232, an arc-shaped magnetic piece 28 cooperating with the annular magnetic piece is fixedly mounted on the rotating pointer 27, the arc-shaped magnetic piece 28 and the annular magnetic piece can be attracted to each other, and the arc-shaped magnetic piece 28 can slide along the annular groove 232. The rotating pointer 27 is magnetically fixed, and the rotation angle of the rotating pointer 27 is easily adjusted.
[0039] Preferably, the main plate body 23 is also engraved with an annular scale 233, and the rotating pointer 27 points to the annular scale 233, so as to achieve precise adjustment of the rotation angle of the rotating pointer 27. The side wall of the annular groove 232 is coated with a Teflon coating. The Teflon coating has a low friction coefficient, and the side wall of the annular groove 232 is coated with a Teflon coating, which helps to reduce the sliding resistance when the arc-shaped magnetic member 28 slides relative to the annular groove 232.
[0040] Preferably, an annular light-transmitting slit is provided on the observation screen 4, and the annular light-transmitting slit cooperates with the annular hole 22 to facilitate the red light emitted by the light source emitter 1 to pass through the observation screen 4, and to facilitate comparison of the position and size relationship between the annular light-transmitting slit and the reflected image.
[0041] In one embodiment, firstly, an adjustable power LD red light source emitter 1 is set, and the appropriate light output power is set according to the application requirements. By using a ring-shaped diffraction element 2 of a set size and a matching parallel collimator 3, a circular ring-shaped indicating light source is formed, which is projected onto the optical element to be adjusted through the ring-shaped light-transmitting slit of the screen-printed observation screen 4, and the position difference between the ring-shaped light-transmitting slit on the observation screen 4 and the reflected image is compared, and whether the reflected image is distorted (increased, reduced or deformed), so as to adjust the position and state of the optical element accordingly.
[0042] Preferably, the light-transmitting hole 21 is a triangular hole or a rectangular hole to achieve the collimation and alignment of the optical element in a specific scene. Compared with a point light source, the use of a triangular hole or a rectangular hole can facilitate the observer to compare the relative position and size relationship of the reflected image and the direct image on the observation screen 4.
[0043] When the above-mentioned optical collimation adjustment device is adopted, a diffraction element 2 is arranged in front of the light source emitter 1, and a ring-shaped, triangular or rectangular light-transmitting hole 21 is opened on the diffraction element 2, so that the observer can compare whether the reflected image on the observation screen 4 coincides with the emission position image of the light source, thereby reducing the error in the collimation of the optical element and improving the alignment efficiency of the optical element.
[0044] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims
1. An optical collimation adjustment device, characterized in that: It includes a coaxially arranged light source emitter, a diffraction element, a parallel collimator and an observation screen. The light source emitter can emit red light and can adjust the light intensity. The diffraction element is provided with a light-transmitting hole, and the light-transmitting hole has a variety of shapes. The observation screen is prepared by screen printing and has a contrast grid engraved on it.
2. An optical collimation adjustment device according to claim 1, characterized in that: The light-transmitting hole is an annular hole, and the diffraction element comprises a main plate body and a shielding plate, and the main plate body and the shielding plate are connected via a fixing plate.
3. An optical collimation adjustment device according to claim 2, characterized in that: The thickness of the shielding plate is smaller than the thickness of the main plate body.
4. The optical collimation adjustment device according to claim 3, characterized in that: The main plate body is provided with a thread groove, the fixing plate is provided with a through hole, and the fastening bolt passes through the through hole and is screwed into the thread groove.
5. The optical collimation adjustment device according to claim 4, characterized in that: The main plate body is also provided with a receiving groove for receiving the fixing plate, and the depth of the receiving groove is consistent with the thickness of the fixing plate.
6. The optical collimation adjustment device according to claim 2, characterized in that: A positioning column protrudes at the center of the shielding plate, and the main plate body is fixedly connected to the positioning column of the shielding plate. A rotating pointer is sleeved on the positioning column, and the rotating pointer is sleeved and installed on the positioning column and can rotate relative to the axis of the positioning column. The length of the rotating pointer is greater than the outer diameter of the annular hole.
7. The optical collimation adjustment device according to claim 6, characterized in that: An annular groove is provided on the main disk body, an annular magnetic part is laid in the annular groove, an arc-shaped magnetic part cooperating with the annular magnetic part is fixedly mounted on the rotating pointer, the arc-shaped magnetic part and the annular magnetic part can be attracted to each other, and the arc-shaped magnetic part can slide along the annular groove.
8. The optical collimation adjustment device according to claim 7, characterized in that: The main disk body is also engraved with an annular scale, the rotating pointer points to the annular scale, and the side wall of the annular slide groove is coated with a Teflon coating.
9. The optical collimation adjustment device according to claim 2, characterized in that: An annular light-transmitting slit is provided on the observation screen, and the annular light-transmitting slit cooperates with the annular hole.
10. The optical collimation adjustment device according to claim 1, characterized in that: The light-transmitting hole is a triangular hole or a rectangular hole.