CN115876125A - Lens collimating device - Google Patents
Lens collimating device Download PDFInfo
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- CN115876125A CN115876125A CN202111136960.7A CN202111136960A CN115876125A CN 115876125 A CN115876125 A CN 115876125A CN 202111136960 A CN202111136960 A CN 202111136960A CN 115876125 A CN115876125 A CN 115876125A
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Abstract
The invention discloses a lens collimation device, which comprises a calibration assembly and a collimation assembly, wherein the calibration assembly is used for determining a main light path where a lens to be collimated is located and enabling emitted light of the collimation assembly to coincide with the main light path; the collimating component comprises a laser, a first slit and a lens component which are sequentially arranged, laser emitted by the laser enters the lens component after passing through the first slit and then enters the lens component after passing through the lens component, and incident light forms an imaging light spot at the first slit after being reflected by the lens component to be collimated and the lens component to be collimated so as to determine the deflection angle of the lens to be collimated relative to a main light path according to the distance from the imaging light spot to the center of the first slit and the length of an optical path from the first slit to the lens to be collimated. The lens collimating device provided by the invention can intuitively and quantitatively calculate the deflection angle of the lens to be collimated, is low in price, light in weight, small in size, durable, not easy to damage and suitable for different test environments.
Description
Technical Field
The invention belongs to the technical field of optical devices, and particularly relates to a lens collimating device.
Background
In the design of the optical path system, the design of the lens occupies a considerable proportion, but the practical use effect of the lens is not satisfactory due to different types of lenses, design, processing and installation errors and the like. Especially, when a plurality of groups of lenses are combined, time and labor are wasted, technical requirements on installation and debugging personnel are high, and design requirements can not be met even if the lenses are slightly deviated.
The verification of the light path usually needs to integrate the use effects of all components, and in order to obtain a satisfactory design effect, repeated verification and multiple adjustments are usually needed, so that the time and labor are wasted, the research and development cost is high, and the design period is delayed. Therefore, an auxiliary optical path system capable of rapidly detecting whether the lens is perpendicular to the main optical path is urgently needed.
Disclosure of Invention
In order to solve the technical problems mentioned in the background art, the invention provides a lens collimation device, which aims to solve the technical problems of complex structure and large volume of an optical system for detecting the collimation condition of a lens in the prior art.
In order to achieve the above object, the present invention provides a lens collimating device, which comprises:
the invention provides a lens collimation device, which comprises a collimation assembly and a collimation assembly,
the calibration assembly is used for determining a main light path where the lens to be collimated is located and enabling the emission light of the collimation assembly to coincide with the main light path;
the collimating component comprises a laser, a first slit and a lens component which are sequentially arranged, laser emitted by the laser enters the lens component after passing through the first slit and then enters the lens component after passing through the lens component, and incident light forms an imaging light spot at the first slit after being reflected by the lens component to be collimated and the lens component to be collimated so as to determine the deflection angle of the lens to be collimated relative to a main light path according to the distance from the imaging light spot to the center of the first slit and the length of an optical path from the first slit to the lens to be collimated.
Further, the lens assembly includes a first mirror and a second mirror, the first mirror reflecting incident light to the second mirror, and reflecting the light to the main light path through the second mirror.
Furthermore, the first reflective mirror and the second reflective mirror are respectively fixed on the two-dimensional adjusting frame.
Further, the device also comprises a laser range finder for detecting the optical path length from the first slit to the lens to be collimated.
Further, the first slit is provided with an annular scale mark and a radioactive scale mark and used for displaying the distance from the imaging light spot to the center of the first slit.
Furthermore, the size of the central hole of the first slit is adjustable, and the size of the light spot is adjusted.
Furthermore, the calibration assembly comprises a second slit and a third slit which are sequentially arranged on the main light path and used for determining the main light path and adjusting the coincidence of emergent light of laser passing through the lens assembly and the main light path.
Further, the second slit and the third slit are both slits with cross-shaped score lines.
Further comprises an observation assembly, the observation assembly comprises a light splitting element and a detector,
the light splitting element is arranged between the first slit and the lens component and is used for splitting incident light into two parts, one part of the incident light is incident to the lens to be collimated through the light splitting element, and the other part of the incident light is captured by the detector after being reflected by the light splitting element; part of the reflected light after being reflected by the collimating lens is reflected by the light splitting element and then captured by the detector, and the other part of the reflected light forms an imaging light spot in the first slit after passing through the light splitting element;
and the detector is used for displaying the image information of the captured partial laser emitted by the laser and the partial light reflected by the lens to be collimated.
Furthermore, the light splitting element is a light splitting prism or a light splitting sheet, and the detector is a CCD camera.
The lens collimating device provided by the invention can intuitively and quantitatively calculate the deflection angle and the deflection direction of the lens to be collimated, has adjustable collimation precision, is low in price, light in weight, small in volume, durable and not easy to damage, is suitable for different test environments, shields a laser and ensures that equipment is safer.
Drawings
FIG. 1 is a schematic structural diagram of a lens collimating device according to a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a lens collimating device according to a second embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a first slit according to an embodiment of the present invention;
FIG. 4 is a diagram of an optical path between a first slit and a lens to be collimated according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of calculating the deflection angle of the lens to be collimated according to the present invention.
The notation in the figure is:
1. a laser; 2. a first slit; 21. radioactive scale lines; 22. an annular scale line; 3. a first reflective mirror; 4. a second reflective mirror; 5. a second slit; 6. a third slit; 7. a lens to be collimated; 8. a light-splitting element; 9. and a detector.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The lens collimation device can display the deflection direction of the lens 7 to be collimated, and guides a debugging worker to adjust the angle of the lens 7 to be collimated, so that the light reflected by the lens to be adjusted is completely overlapped with the incident light emitted by a laser, and the lens 7 to be collimated is shown to be perpendicular to a main light path.
The first embodiment is as follows:
fig. 1 schematically shows a structural diagram of a lens collimating device. As shown in fig. 1, the lens collimating apparatus of the present application comprises a collimating assembly, and a viewing assembly, wherein,
the calibration assembly is used for determining a main light path L1 where the lens 7 to be collimated is located and enabling the emission light of the collimation assembly to coincide with the main light path L1;
the collimation assembly comprises a laser 1, a first slit 2 and a lens assembly which are sequentially arranged and is used for determining the deflection angle of the lens 7 to be collimated relative to the main optical path L1;
and the observation assembly comprises a light splitting element 8 and a detector 9 and is used for displaying the deviation direction between a deviation light spot formed by part of light rays reflected by the lens 7 to be collimated and a reference light spot formed by part of light rays emitted by the laser 1.
Before the lens 7 to be collimated is collimated, light emitted by the laser 1 needs to be adjusted to coincide with the main light path L, firstly, the calibration assembly is installed in the main light path L1, and the calibration assembly is adjusted to enable light emitted by a light source in the main light path L1 to pass through the calibration assembly, so that the main light path L1 where the lens 7 to be collimated is located is determined; secondly, a laser 1, a first slit 2 and a lens assembly are sequentially installed, and the first slit 2 and the lens assembly are adjusted to enable light rays emitted by the laser 1 to coincide with a main light path L1; finally, an observation assembly is installed, and a light splitting element 8 is adjusted, so that light emitted by the laser 1 is displayed in the center of a display picture of a detector 9.
After the light path is adjusted, the lens 7 to be collimated is installed in the main light path L1 between the lens component and the calibration component. The collimation process comprises the following steps: on one hand, after light emitted by the laser 1 passes through the first slit 2, a part of incident light passes through the light splitting element 8 and is incident on the lens assembly and is incident on the lens 7 to be collimated after passing through the lens assembly, and part of reflected light after the incident light passes through the lens 7 to be collimated and the lens assembly and is reflected after passing through the light splitting element 8 forms an imaging light spot in the first slit 2, so that the deflection angle of the lens 7 to be collimated relative to the main light path L1 is determined according to the distance from the imaging light spot to the center of the first slit 2 and the optical path length between the first slit 2 and the lens 7 to be collimated.
On the other hand, after the light emitted by the laser 1 passes through the first slit 2, another part of incident light is reflected by the light splitting element 8 and then captured by the detector 9, so that a reference light spot formed by part of the light emitted by the laser 1 is displayed on the detector 9; the other part of the reflected light reflected by the lens 7 to be collimated and the lens assembly is reflected by the light splitting element 8 and then captured by the detector 9, so that an offset light spot formed by the part of the light reflected by the lens 7 to be collimated is displayed, the offset direction of the lens 7 to be collimated is determined according to the positions of the offset light spot and the reference light spot, the angle of the lens 7 to be collimated is adjusted, the light reflected by the lens 7 to be collimated is completely overlapped with the laser emitted by the laser 1, and the adjustment is completed.
Example two:
on the basis of the first embodiment, the selection of the calibration assembly, the lens assembly and the observation assembly and the position arrangement of each assembly are specifically described.
As shown in fig. 2, the calibration assembly includes a second slit 5 and a third slit 6 sequentially disposed on the main light path L1, and both the second slit 5 and the third slit 6 are slits with cross-shaped scribed lines, and are used for determining the main light path L1 and adjusting the coincidence of the emergent light of the laser passing through the lens assembly and the main light path L1;
the lens assembly comprises a first reflector 3 and a second reflector 4, the first reflector 3 reflects incident light rays to the second reflector 4, and the light rays are reflected to the main light path L1 through the second reflector 4; the second reflecting mirror 4 reflects the light L2 reflected by the lens 7 to be collimated to the first reflecting mirror 3, and forms an imaging light spot on the first slit 2.
The light splitting element 8 is disposed on the optical path between the first slit 2 and the first mirror 3.
Specifically, when the light path is installed, first, the second slit 5 and the third slit 6 are installed in the main light path L1, light emitted by the light source on the main light path L1 irradiates on the second slit 5 and the third slit 6, and the second slit 5 and the third slit 6 are respectively adjusted left and right or adjusted up and down, so that the light emitted by the light source on the main light path L1 passes through the central positions of the second slit 5 and the third slit 6, and the main light path L1 can be limited.
Next, the first reflecting mirror 3 and the second reflecting mirror 4 are mounted on a two-dimensional adjusting bracket, and the two-dimensional adjusting bracket is adjusted to adjust the tilt angles of the first reflecting mirror 3 and the second reflecting mirror 4. Adjusting the second reflecting mirror 4 to enable the laser emitted from the first slit 2 to be positioned at the center of the third slit 6 after the laser sequentially passes through the first reflecting mirror 3 and the second reflecting mirror 4; then, the first reflecting mirror 3 is adjusted, so that the laser light emitted from the first slit 2 passes through the center position of the second slit 5 after being reflected by the first reflecting mirror 3 and the second reflecting mirror 4, that is, the laser light emitted by the laser 1 passes through the center positions of the second slit 5 and the third slit 6 through the cooperation of the two-dimensional adjusting frame and the first reflecting mirror 3 and the second reflecting mirror 4, and at this time, the light reflected by the second reflecting mirror 4 can be considered to coincide with the main light path L1.
When the lens 7 to be collimated is collimated, after the light reflected by the second reflective mirror 4 is overlapped with the main light path L1, the lens 7 to be collimated is placed in the main light path L1 between the second reflective mirror 4 and the second slit 5, as shown in fig. 2, a part of laser emitted by the laser 1 is incident on the first reflective mirror 3 after passing through the first slit 2 and the light splitting element 8, and is irradiated onto the lens 7 to be collimated after being reflected by the first reflective mirror 3 and the second reflective mirror 4, and the light L2 reflected by the lens 7 to be collimated passes through the light splitting element 8 after being reflected by the second reflective mirror 4 and the first reflective mirror 3, so that an imaging light spot is formed on the first slit 2, and a deflection angle of the lens 7 to be collimated relative to the main light path L1 is determined according to a distance from the imaging light spot to a center of the first slit 2 and an optical path length between the first slit 2 and the lens 7 to be collimated.
On the other hand, after the light emitted by the laser 1 passes through the first slit 2, another part of incident light is reflected by the light splitting element 8 and then captured by the detector 9, so that a reference light spot formed by part of the light emitted by the laser 1 is displayed on the detector 9; after the reflected light L2 reflected by the lens 7 to be collimated is reflected by the second reflective mirror 4 and the first reflective mirror 3 in sequence, another part of the reflected light L2 is reflected by the light splitting element 8 and then captured by the detector 9 to display an offset light spot formed by a part of the light reflected by the lens 7 to be collimated, so as to determine the offset direction of the lens 7 to be collimated according to the positions of the offset light spot and the reference light spot, adjust the angle of the lens 7 to be collimated, completely coincide the light reflected by the lens 7 to be collimated and the laser emitted by the laser 1, namely, the adjustment is completed.
Specifically, the laser 1 may be a helium-neon laser that emits laser light having a wavelength of 0.633 μm.
Specifically, the first reflective mirror 3 and the second reflective mirror 4 are two reflective mirrors parallel to each other, the mirror surfaces of the first reflective mirror 3 and the second reflective mirror 4 are arranged oppositely, the first reflective mirror 3 and the second reflective mirror 4 are fixed on the two-dimensional adjusting frame respectively, the first reflective mirror 3 is arranged behind the first slit 2 along the transmission direction of the laser emitted by the laser 1, the second reflective mirror 4 is arranged on the main light path L1, and light reflected to the main light path L1 through the second reflective mirror 4 can pass through the second slit 5 and the third slit 6 respectively.
In another embodiment, the lens assembly may also be two focusing lenses and a fixed cross-hair, and the laser 1 and the focusing lenses are used to project the cross-hair onto the main light path instead of the above-mentioned laser, so as to achieve the function of guiding the laser emitted by the laser 1 to the main light path.
In the present embodiment, the first slit 2 has a ring-shaped graduation mark 22 and a radioactive graduation mark 21 for displaying the distance from the imaging spot to the center of the first slit. The size of the central hole of the first slit 2 is adjustable, and the size of the imaging light spot is adjusted. By reading the distance h from the imaging light spot of the reflected light beam L2 passing through the lens 7 to be collimated on the first slit 2 to the center of the first slit 2, and determining the size relationship between the distance from the light spot of the reflected light beam to the center of the first slit 2 and the preset distance threshold, it is possible to determine whether the lens 7 to be collimated is perpendicular to the main light path L1. If the preset distance threshold is set to be 0.5mm, and the actually measured distance from the light spot of the reflected light L2 to the center of the first slit 2 is 0.3mm, it is determined that the lens 7 to be collimated is perpendicular to the main light path L1; if the actually measured distance from the light spot of the reflected light L2 to the center of the first slit 2 is 0.8mm, it is determined that the lens 7 to be collimated is not perpendicular to the main light path L1. When the adjusting staff adjusts the lens 7 to be collimated, when the distance from the light spot of the reflected light L2 reflected by the lens 7 to be collimated to the center of the first slit 2 is observed to be less than 0.3mm, it indicates that the adjustment of the lens 7 to be collimated is completed.
The smaller the preset distance threshold is, the more the lens 7 to be collimated tends to be perpendicular to the main light path L1, and correspondingly, when the actually measured distance from the light spot of the reflected light L2 to the center of the first slit 2 is greater than the preset distance threshold, the greater the difficulty in adjusting the lens 7 to be collimated to be perpendicular to the main light path L1 is, and the distance threshold may be determined according to the actual situation.
The first slit 2 is an adjustable slit or an adjustable diaphragm, and the adjustable slit is the prior art and is not described herein again; or, as shown in fig. 3, the first slit 2 is a screen capable of imaging, and the center of the screen has a central hole, in this application, the collimating device includes a plurality of first slits 2 with different central hole sizes, and when adjusting the precision, the first slit 2 corresponding to the central hole size may be selected. By adopting the adjustable slit, the diameter of the laser spot passing through the first slit 2 can be adjusted, and the adjustment precision is influenced. Generally, the smaller the central hole of the first slit 2 is, the smaller the diameter of the laser spot passing through the first slit 2 is, and the smaller the diameter of the imaging spot reflected by the lens 7 to be collimated is, so that the adjustment precision is higher; the larger the central hole of the first slit 2 is, the larger the diameter of the laser spot passing through the first slit 2 is, the larger the diameter of the imaging spot reflected by the lens 7 to be collimated is, and the lower the adjustment precision is. However, if the central hole of the first slit 2 is small, the light spot brightness of the reflected light passing through the lens 7 to be collimated is low, which is not favorable for measuring the distance from the light spot of the reflected light to the center of the first slit 2, and therefore the size of the central hole of the first slit 2 needs to be determined according to actual situations.
In this embodiment, the collimating device further includes a laser range finder, configured to detect an optical path length between the first slit 2 and the lens to be collimated 7, where a tangent value of a deflection angle of a normal of the lens to be collimated 7 with respect to the main optical path L1 is a ratio of a distance from the imaging spot to a center of the first slit 2 to the optical path length between the first slit 2 and the lens to be collimated 7, and the optical path length between the first slit 2 and the lens to be collimated 7 includes an optical path d0 between the first slit 2 and the first reflective mirror 3, an optical path d1 between the first reflective mirror 3 and the second reflective mirror 4, and an optical path d2 between the second reflective mirror 4 and the lens to be collimated 7. As can be seen from fig. 4 and 5, assuming that the path of the incident light of the ideal light path between the first slit 2 and the second reflective mirror 4 is fixed, the first reflective mirror 3 and the second reflective mirror 4 are parallel to each other and form an inclination angle of 45 ° with the horizontal direction, the laser emitted by the laser 1 and the first reflective mirror 3 and the first reflective mirror 4 are both at a reflection angle of 45 °, the light horizontally enters the lens 7 to be collimated, and the process of fig. 4 to 5 can be obtained through processing.
When laser light emitted by the laser 1 passes through the first slit 2 and is superposed with the main light path L1 through light rays reflected by the first reflective mirror 3 and the second reflective mirror 4, a path between the first slit 2 and the second reflective mirror 4 can be measured, wherein the path between the first slit 2 and the second reflective mirror 4 is the sum of a distance d0 between the first slit 2 and the first reflective mirror 3 and a distance d1 between the first reflective mirror 3 and the second reflective mirror 4.
The deflection angle α of the lens 7 to be collimated, that is, the included angle between the normal of the lens 7 to be collimated and the main light path L1, satisfies the following formula:
tanα＝h/(d0+d1+d2)。
it can be known that the deflection angle of the lens 7 to be collimated can be calculated by obtaining the optical path length between the first slit 2 and the second reflective mirror 4 and the distance h from the light spot of the light reflected by the lens 7 to be collimated on the first slit 2 to the center of the first slit 2.
The method for determining the offset direction of the lens 7 to be collimated by the collimating device in the present embodiment is as follows: after laser emitted from the first slit 2 passes through the light splitting element 8, a part of the laser enters the detector 9 to form a reference light spot, another part of the laser enters the first reflective mirror 3, is reflected by the first reflective mirror 3, enters the second reflective mirror 4, is reflected by the second reflective mirror 4, enters the lens 7 to be collimated, light reflected by the lens 7 to be collimated is reflected by the second reflective mirror 4 and the first reflective mirror 3, a part of the light forms an imaging light spot on the first slit 2, and another part of the light is reflected by the light splitting element 8 and then is captured and displayed by the detector 9. The offset direction of the lens 7 to be collimated is determined by the reference light spot captured by the detector 9 and the light spot formed after being reflected by the lens 7 to be collimated, for example, the image information acquired by the detector can be divided into four quadrants, the reference light spot is positioned at the center position of the image information, and the offset direction of the lens 7 to be collimated is determined according to the quadrant in which the reflected light captured by the detector 9 is positioned.
Specifically, the light splitting element 8 is a light splitting prism or a light splitting sheet, and the detector 9 is a CCD camera.
The lens collimating device provided by the embodiment of the invention can intuitively and quantitatively calculate the deflection angle and the deflection direction of the lens 7 to be collimated, has adjustable collimation precision, low price, light weight, small volume, durability and difficult damage, is suitable for different test environments, and ensures that equipment is safer due to partial shielding.
Those skilled in the art will appreciate that although some embodiments herein include some features included in other embodiments, not others, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A lens collimation device is characterized by comprising a collimation assembly and a collimation assembly,
the calibration assembly is used for determining a main light path where the lens to be collimated is located and enabling the emission light of the collimation assembly to coincide with the main light path;
the collimating component comprises a laser, a first slit and a lens component which are sequentially arranged, laser emitted by the laser is incident to the lens component after passing through the first slit, and is incident to the lens component after passing through the lens component, incident light forms an imaging light spot at the first slit after being reflected by the lens component to be collimated and the lens component, and the deflection angle of the lens to be collimated relative to a main light path is determined according to the distance from the imaging light spot to the center of the first slit and the optical path length from the first slit to the lens to be collimated.
2. The lens collimating apparatus of claim 1, wherein the lens assembly comprises a first mirror and a second mirror, the first mirror reflecting the incident light to the second mirror and reflecting the light to the primary optical path via the second mirror.
3. The lens collimating apparatus of claim 1, wherein the first mirror and the second mirror are each fixed to a two-dimensional adjustable mount.
4. The lens collimating device of claim 1, further comprising a laser range finder for detecting an optical path length between the first slit and the lens to be collimated.
5. The lens collimating apparatus of claim 1, wherein the first slit has an annular graduation mark and a radioactive graduation mark for displaying the distance from the imaging spot to the center of the first slit.
6. The lens collimating apparatus of claim 5, wherein the central aperture of the first slit is adjustable in size for adjusting the spot size.
7. The lens collimation apparatus of claim 1, wherein the calibration assembly comprises a second slit and a third slit sequentially disposed on the main optical path for defining the main optical path and adjusting the emergent light of the laser passing through the lens assembly to coincide with the main optical path.
8. The lens collimating apparatus of claim 7, wherein the second slit and the third slit are both slits with cross-hatched lines.
9. The lens collimating apparatus of claim 1, further comprising a viewing assembly, the viewing assembly comprising a beam splitting element and a detector,
the light splitting element is arranged between the first slit and the lens assembly and is used for splitting incident light into two parts, one part of the incident light is incident to the lens to be collimated through the light splitting element, and the other part of the incident light is reflected by the light splitting element and then captured by the detector; part of the reflected light after being reflected by the collimating lens is reflected by the light splitting element and then captured by the detector, and the other part of the reflected light forms an imaging light spot in the first slit after passing through the light splitting element;
and the detector is used for displaying the image information of the captured partial laser emitted by the laser and the partial light reflected by the lens to be collimated.
10. The lens collimating apparatus of claim 9, wherein the beam splitting element is a beam splitting prism or a beam splitter, and the detector is a CCD camera.
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| CN202111136960.7A CN115876125A (en) | 2021-09-27 | 2021-09-27 | Lens collimating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111136960.7A CN115876125A (en) | 2021-09-27 | 2021-09-27 | Lens collimating device |
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| CN115876125A true CN115876125A (en) | 2023-03-31 |
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| CN202111136960.7A Pending CN115876125A (en) | 2021-09-27 | 2021-09-27 | Lens collimating device |
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