CN218413090U - Laser collimation adjusting device - Google Patents
Laser collimation adjusting device Download PDFInfo
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- CN218413090U CN218413090U CN202223041847.3U CN202223041847U CN218413090U CN 218413090 U CN218413090 U CN 218413090U CN 202223041847 U CN202223041847 U CN 202223041847U CN 218413090 U CN218413090 U CN 218413090U
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Abstract
The utility model discloses a laser collimation adjusting device, which comprises a laser diode, a collimating lens, a facula observation screen, a focusing lens, an image acquisition module, a display and an installation bottom plate; the laser diode, the collimating lens, the light spot observation screen, the focusing lens and the image acquisition module are sequentially arranged on the same light path; the mounting base plate is provided with 4 mounting seats for mounting the collimating lens, the light spot observation screen, the focusing mirror and the image acquisition module, wherein sliding grooves are arranged below the mounting seats of the light spot observation screen and the focusing mirror and used for moving the light spot observation screen or the focusing mirror into or out of a light path, and switching of two functional modes of near field observation and far field observation is achieved. The utility model discloses simple structure can satisfy the collimation demand under two kinds of scenes of near field and far field, switches working mode through the spout, can accomplish laser diode from the complete collimation process of coarse adjustment to fine setting.
Description
Technical Field
The utility model belongs to the technical field of laser light source, concretely relates to laser collimation adjusting device.
Background
The semiconductor laser has the advantages of small volume, light weight, high reliability, long service life, low power consumption and the like, and is widely applied in many fields. The main disadvantage of semiconductor lasers is the large divergence angle. In the related application fields of laser radars and the like, laser is used for remote detection and needs very high collimation degree, namely, a small enough divergence angle, so that a semiconductor laser needs to use a collimating lens for collimation, and the relative position of a laser diode and the collimating lens needs to be precisely adjusted, so that the divergence angle is minimum.
In the actual production process, the existing adjusting devices mainly include the following:
the human eyes are used for visual inspection, the equipment cost is the lowest, but the collimation effect is directly related to the eyesight and experience of an operator, depends on subjective judgment and working conditions of the operator and is not stable enough. The long-time high-brightness laser easily causes visual fatigue and has great harm to human eyes. In addition, the method of visual inspection by human eyes cannot be used for laser collimation in the non-visible light band.
The camera observation, common camera observation scheme places the facula at the far away of laser instrument transmission direction and observes the screen, gathers the image through industry camera, utilizes far field facula size to calculate the divergence angle, and the shortcoming lies in needs longer light path, just can acquire comparatively accurate far field divergence angle, and the required working space of equipment is big. The other feasible scheme is to design a scheme of multiple reflectors for optical path compression, so that the working space required by the equipment is reduced, and the defects that the optical path design is relatively complex, the installation requirement is relatively high, and more errors are easily introduced are overcome.
The spot analyzer directly impacts the collimated laser on the spot analyzer, so that the size of a divergence angle can be obtained immediately, adjustment feedback is provided for an operator, space is saved, and the defect is that the price of the special spot analyzer is very high.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at overcomes prior art's shortcoming and not enough, provides a laser collimation adjusting device, supports two kinds of observation modes of near field and far field, can carry out the collimation adjustment to the laser diode of various wavelengths.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a laser collimation adjusting device comprises a laser diode, a collimating lens, a facula observation screen, a focusing lens, an image acquisition module, a display and an installation bottom plate;
the laser diode, the collimating lens, the light spot observation screen, the focusing lens and the image acquisition module are sequentially arranged on the same light path;
the mounting base plate is provided with 4 mounting seats for mounting the collimating lens, the light spot observation screen, the focusing mirror and the image acquisition module, wherein sliding grooves are arranged below the mounting seats of the light spot observation screen and the focusing mirror and used for moving the light spot observation screen or the focusing mirror into or out of a light path, and switching of two functional modes of near field observation and far field observation is achieved.
Further, a laser diode, a point light source, for emitting a light beam;
the collimating lens is used for collimating the light beam emitted by the laser diode and reducing the divergence angle of the light beam;
the laser diode is arranged at the focus position of the collimating lens, and the emitted light beam of the laser diode is output as a parallel light beam after passing through the collimating lens.
Further, the light spot observation screen is used for projecting the parallel light beams to form light spots and directly observing the light spots; and a circular hollow target pattern is arranged in the middle of the screen according to the collimation requirement, so that reference is provided for the position and the size of the collimated light spot.
Further, the focusing mirror is arranged on the light path of the parallel light beams, and converts the parallel light beams into far-field light spots for observing the size of the divergence angle.
Further, in the near-field observation mode, the image acquisition module adopts an industrial camera and an industrial lens and is used for acquiring the image of the facula observation screen;
in a far-field observation mode, the image acquisition module adopts an industrial camera and a light filtering attenuation sheet and is used for directly acquiring light spots;
the industrial camera is used for collecting light spot images, is arranged on the focus of the focusing mirror, is connected with the display and has two working modes of indirect imaging of an industrial lens and direct imaging of a camera target surface;
the industrial lens is matched with an industrial camera for use and is used for imaging the image of the facula observation screen;
the filter attenuation sheet is used for a camera target surface direct imaging mode, reduces the laser intensity, prevents the laser from damaging the target surface, and simultaneously removes the interference of light rays in other wave bands.
Furthermore, the display is used for displaying images collected by the industrial camera and assisting the adjustment of the laser collimating lens.
Further, the collimating lens is specifically a fast-slow axis collimating lens group.
Furthermore, the light spot observation screen is a diffuse reflection screen, the reflectivity is less than 100%, the light spots can be observed on the front surface and the back surface, and the size of the target is smaller than that of the target surface of the industrial camera.
Further, the focusing lens is a coated plano-convex lens.
Further, the industrial camera is specifically a near-infrared enhanced industrial camera.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
1. the device can flexibly work in two modes of a near field and a far field by the combination of the optical devices and the design of the structure, avoids subjective errors of eye visual inspection debugging of human eyes, improves the consistency of debugging, effectively protects the eyesight, avoids potential harm of laser to the human eyes, and can also collimate and adjust the laser of an invisible light wave band.
2. The near field mode of the device images the light spot observation screen, and the round target on the light spot observation screen provides reference for collimation, so that the collimation efficiency and accuracy are improved.
3. When the device is used for directly imaging the target surface of the camera, the light filtering attenuation sheet can filter light of non-target wave bands, so that light spot images are clearer and can be observed easily.
4. After the device focuses the light beam through the focusing lens, the light spot size can reflect the divergence angle of the laser, the working space required by measuring the far-field divergence angle is greatly compressed, the complicated light path design is avoided, an operator can calculate the size of the corresponding reference light spot according to the requirement of the collimation degree, and the collimation degree is judged, so that the adjustment is carried out.
5. The device has a simple structure, can meet the collimation requirements in two scenes of a near field and a far field, switches the working modes through the sliding groove, and can complete the complete collimation process from coarse adjustment to fine adjustment of the laser diode.
Drawings
Fig. 1 is a schematic diagram of a near field mode of the apparatus of the present invention;
FIG. 2 is a schematic diagram of an image acquisition module in near field mode;
fig. 3 is a schematic diagram of the far field mode of the inventive apparatus;
FIG. 4 is a schematic diagram of an image acquisition module in far field mode;
FIG. 5 is a schematic view of a mounting plate;
FIG. 6 is a schematic view of a spot viewing screen;
the reference numbers illustrate: 1-a laser diode; 2-a collimating lens; 3-light spot observation screen; 4-a focusing mirror; 5-an image acquisition module; 6-a display; 7-mounting a bottom plate; 700-a first runner; 701-second runner.
Detailed Description
The present invention will be described in further detail with reference to the following examples and drawings, but the present invention is not limited thereto.
Examples
As shown in fig. 1 and fig. 3, the present invention relates to a laser collimation adjusting device, which comprises a laser diode 1, a collimating lens 2, a light spot observation screen 3, a focusing lens 4, an image collecting module 5, a display 6 and a mounting base plate 7;
the laser diode, the collimating lens, the light spot observation screen, the focusing lens and the image acquisition module are sequentially arranged on the same light path;
a laser diode, a point light source, for emitting a light beam;
the collimating lens is used for collimating the light beam emitted by the laser diode and reducing the divergence angle of the light beam; the laser diode is arranged at the focus position of the collimating lens, and the light beam emitted by the laser diode is output as a parallel light beam after passing through the collimating lens; in this embodiment, the collimating lens assembly is specifically a fast-slow axis collimating lens assembly.
The light spot observation screen is used for projecting parallel light beams to form light spots and directly observing the light spots; setting a circular hollow target pattern in the middle of the screen according to the collimation requirement, and providing reference for the position and the size of the collimated light spot; in this embodiment, the reflective screen is a diffuse reflection screen, the reflectivity is less than 100%, light spots can be observed on both the front and the back, and the size of the target is smaller than that of the target surface of the industrial camera.
The focusing mirror is arranged on a parallel light beam light path and converts the parallel light beam into a far-field light spot for observing the size of a divergence angle; in the embodiment, the coated plano-convex lens is adopted, so that the imaging is clear and the aberration is small.
As shown in fig. 5, the mounting base plate is provided with 4 mounting seats for mounting the collimating lens, the light spot observation screen, the focusing lens and the image acquisition module; the first sliding groove 700 and the second sliding groove 701 are respectively arranged below the mounting seats of the light spot observation screen and the focusing lens and used for moving the light spot observation screen or the focusing lens into or out of a light path, so that switching between two functional modes of near field observation and far field observation is realized.
In the near-field observation mode, as shown in fig. 2, the image acquisition module adopts an industrial camera and an industrial lens and is used for acquiring an image of the light spot observation screen;
in a far-field observation mode, as shown in fig. 4, the image acquisition module adopts an industrial camera and a filter attenuator for directly acquiring light spots;
the industrial camera is used for collecting light spot images, is arranged on the focus of the focusing mirror, is connected with the display and has two working modes of indirect imaging of an industrial lens and direct imaging of a camera target surface; in the embodiment, the near-infrared enhanced industrial camera is adopted, and has a good observation effect on commonly used wavebands of the laser radar, such as 905nm, 1550nm and the like.
The industrial lens is matched with an industrial camera for use and is used for imaging the image of the facula observation screen;
the filter attenuation sheet is used for a camera target surface direct imaging mode, reduces the laser intensity, prevents the laser from damaging the target surface, and simultaneously removes the interference of light rays in other wave bands.
And the display is used for displaying the image collected by the industrial camera and assisting the adjustment of the laser collimating lens.
The near-field observation mode of the embodiment is specifically as follows:
before the adjustment starts, as shown in fig. 1, the focusing mirror is moved out of the optical path through the first chute and the second chute, and the light spot observation screen is moved into the optical path, so that the adjustment of the optical path is completed. The image acquisition module acquires an image of the light spot observation screen by adopting a lens indirect imaging method. The light spot observation screen is provided with a circular target in the center as shown in fig. 6, and the size of the circular target is half of the size of the target surface of the industrial camera and is used for light spot reference of collimation adjustment.
The coarse tuning process of the near-field observation mode comprises the following steps:
the laser diode emits a light beam, the light beam is collimated by the collimating lens and then outputs a parallel light beam, the parallel light beam strikes the light spot observation screen to form a light spot, and the image acquisition module acquires an image of the light spot observation screen and displays the image on the display as a collimated feedback. When the light spot is larger than the target, the divergence angle is too large, and when the light spot is not in the target range, the light path is not aligned, and the position and the angle of the laser diode need to be repeatedly adjusted in the two situations; and when the light spot is adjusted to be smaller than the target and within the target range, the coarse adjustment is finished, and a far-field observation mode is entered for fine adjustment.
The far-field observation mode of the embodiment is specifically as follows:
before the adjustment starts, as shown in fig. 3, the focusing mirror is moved into the light path through the first chute and the second chute, and the light spot observation screen is moved out of the light path, so that the light path adjustment is completed. The image acquisition module is reassembled, the image acquisition module is changed into be composed of the filter attenuation sheet and the industrial camera, the light spots are directly projected to directly form images on the target surface of the industrial camera, the filter attenuation sheet can reduce laser power to prevent the target surface from burning out, and meanwhile, light with other wavelengths is filtered, so that the light spots are more clear in images, and observation is facilitated.
The fine tuning process of the far-field observation mode is as follows:
the laser diode emits a light beam, the light beam is collimated by the collimating lens and then outputs a parallel light beam, and the light beam is focused by the focusing lens with the focal length f and hits the target surface of the industrial camera at the focal point; the size of the light spot reflects the divergence angle of the laser; when the maximum divergence angle of collimation is θ, the maximum size of the focused spot d =2 θ f, so
When the diameter of the light spot is larger than n pixels, the collimation degree does not meet the requirement, the position and the angle of the laser diode are adjusted until the diameter of the light spot is smaller than n pixels, and collimation adjustment is finished.
It should also be noted that in this specification, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A laser collimation adjusting device is characterized by comprising a laser diode, a collimation lens, a facula observation screen, a focusing lens, an image acquisition module, a display and a mounting base plate;
the laser diode, the collimating lens, the light spot observation screen, the focusing lens and the image acquisition module are sequentially arranged on the same light path;
the mounting base plate is provided with 4 mounting seats for mounting the collimating lens, the light spot observation screen, the focusing mirror and the image acquisition module, wherein sliding grooves are arranged below the mounting seats of the light spot observation screen and the focusing mirror and used for moving the light spot observation screen or the focusing mirror into or out of a light path, and switching of two functional modes of near field observation and far field observation is achieved.
2. The laser collimation adjustment device as claimed in claim 1, wherein the laser diode, the point light source, is configured to emit a light beam;
the collimating lens is used for collimating the light beam emitted by the laser diode and reducing the divergence angle of the light beam;
the laser diode is arranged at the focus position of the collimating lens, and the emitted light beam of the laser diode is output as a parallel light beam after passing through the collimating lens.
3. The laser collimation adjusting device as claimed in claim 1, wherein the light spot observation screen is used for projecting parallel light beams to form a light spot and directly observing the light spot; and a circular hollow target pattern is arranged in the middle of the screen according to the collimation requirement, so that reference is provided for the position and the size of the collimated light spot.
4. The laser alignment apparatus of claim 2, wherein the focusing mirror is disposed on the optical path of the parallel light beam to convert the parallel light beam into a far-field spot for viewing the divergence angle.
5. The laser collimation adjusting device as claimed in claim 1, wherein in the near-field observation mode, the image acquisition module employs an industrial camera and an industrial lens for acquiring the image of the light spot observation screen;
in a far-field observation mode, the image acquisition module adopts an industrial camera and a light filtering attenuation sheet and is used for directly acquiring light spots;
the industrial camera is used for collecting light spot images, is arranged on the focus of the focusing mirror, is connected with the display and has two working modes of indirect imaging of an industrial lens and direct imaging of a camera target surface;
the industrial lens is matched with an industrial camera for use and is used for imaging the image of the facula observation screen;
the filter attenuation sheet is used for a camera target surface direct imaging mode, reduces the laser intensity, prevents the laser from damaging the target surface, and simultaneously removes the interference of light rays in other wave bands.
6. The laser collimation adjusting device as claimed in claim 5, wherein the display is used for displaying images collected by the industrial camera to assist the adjustment of the laser collimation lens.
7. The laser collimation adjusting device as claimed in claim 2, wherein the collimating lens is embodied as a fast-slow axis collimating lens group.
8. The laser collimation adjusting device as claimed in claim 3, wherein the light spot observation screen is a diffuse reflection screen, the reflectivity is less than 100%, the light spots can be observed on both the front and back surfaces, and the size of the target is smaller than that of the target surface of the industrial camera.
9. The laser collimation adjusting device as recited in claim 4, wherein the focusing lens is a coated plano-convex lens.
10. The laser collimation adjustment device as recited in claim 5, wherein the industrial camera is a near infrared enhanced industrial camera.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223041847.3U CN218413090U (en) | 2022-11-16 | 2022-11-16 | Laser collimation adjusting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223041847.3U CN218413090U (en) | 2022-11-16 | 2022-11-16 | Laser collimation adjusting device |
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| Publication Number | Publication Date |
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| CN218413090U true CN218413090U (en) | 2023-01-31 |
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| CN202223041847.3U Active CN218413090U (en) | 2022-11-16 | 2022-11-16 | Laser collimation adjusting device |
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