Beam shrinking mirror with adjustable focal length
By designing an adjustable focal length beam reducer and using the combined adjustment of a movable lens barrel and a convex lens, the problem of cumbersome optical debugging in the existing technology is solved, and fast and accurate adjustment of the laser focal length and complete imaging of the light spot are achieved.
Patent Information
- Application Number
- CN202422838048.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-20
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-11-20
AI Technical Summary
The optical debugging process of existing beam reducers is cumbersome and time-consuming, making it difficult to achieve rapid and accurate adjustment of the laser focal length, resulting in incomplete imaging of the laser spot in the spectrometer.
The use of an adjustable focal length beam reducer allows for flexible adjustment of the incident and output laser focal lengths by adjusting the depth of the movable lens barrel within the fixed lens barrel and the position of the convex lens within the fixed lens barrel. Combined with the design of the locking nut and elastic member, the adjustment process is simplified.
It achieves fast and accurate adjustment of the laser focal length, ensures complete imaging of the laser spot in the spectrometer, simplifies the optical debugging process, and improves adjustment efficiency and accuracy.
Smart Images
Figure CN223389962U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of spectral instruments, and in particular to a focal length adjustable beam reducer. Background Art
[0002] When the optical fiber is connected to the spectrometer, due to the large divergence angle of the optical fiber, a beam reducer is needed to increase the peak power density of the outgoing laser, so that the large circular spot is changed into a small circular spot, which can be fully imaged into the collimating mirror in the spectrometer.
[0003] In the existing technology, optical debugging of the beam reducer usually changes the wavelength of the laser by changing the wavelength corresponding to the low-loss region of the resonant cavity through certain components. This method requires a series of fixture debugging and optical debugging, and the adjustment process is cumbersome and time-consuming.
[0004] To this end, an improved adjustable focal length beam reducer is provided. Utility Model Content
[0005] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and provide an adjustable focal length beam reducer to realize convenient and quick adjustment of the laser focal length and accurate focusing, and to completely image the laser spot formed by the beam reducer into the collimating mirror surface in the spectrometer.
[0006] In order to achieve the above-mentioned purpose of the utility model, the present invention adopts the following technical solutions:
[0007] An adjustable focal length beam reducer comprises a fixed lens barrel and a movable lens barrel arranged in sequence, wherein a convex lens is movably arranged in the fixed lens barrel, a first lens is arranged at one end of the movable lens barrel, and a second lens is arranged at the other end of the movable lens barrel;
[0008] One end of the movable lens barrel is threadedly installed in the fixed lens barrel to adjust the focal length of the laser at the incident end of the contracted light; the convex lens can move along the axial direction in the fixed lens barrel to adjust the focal length of the laser at the output end of the contracted light.
[0009] In an exemplary embodiment of the present disclosure, a first locking nut is threadedly installed on a side of the fixed lens barrel away from the movable lens barrel, a mounting groove is provided on a side of the fixed lens barrel close to the movable lens barrel, an elastic member is provided in the mounting groove, the convex lens is located between the first locking nut and the elastic member, the convex lens is provided on the first locking nut, and the elastic member is in contact with the convex lens.
[0010] In an exemplary embodiment of the present disclosure, the convex lens is fixed to the first locking nut by ultraviolet glue.
[0011] In an exemplary embodiment of the present disclosure, one of the first lens and the second lens is fixed in the movable lens barrel by ultraviolet glue, and the other of the first lens and the second lens is installed in the movable lens barrel by a second locking nut.
[0012] In an exemplary embodiment of the present disclosure, the second locking nut is threadably installed in the movable lens barrel.
[0013] In an exemplary embodiment of the present disclosure, a third locking nut is threadedly mounted on the movable lens barrel, and the third locking nut is located between the fixed lens barrel and the movable lens barrel.
[0014] In an exemplary embodiment of the present disclosure, anti-slip grooves are evenly distributed on the circumferential outer wall of the third locking nut.
[0015] In an exemplary embodiment of the present disclosure, a coaxial connector is provided at one end of the movable lens barrel away from the fixed lens barrel, and a fiber optic plug is detachably provided at one end of the coaxial connector away from the movable lens barrel.
[0016] In an exemplary embodiment of the present disclosure, the coaxial connector is threadedly installed in the movable lens barrel, and the coaxial connector and the movable lens barrel are connected by bolts.
[0017] In an exemplary embodiment of the present disclosure, a plurality of bolt holes are uniformly distributed along the circumference at one end of the fixed lens barrel away from the movable lens barrel.
[0018] Beneficial effects of the present disclosure:
[0019] The present disclosure provides an adjustable focal length beam reducer, which can adjust the focal length of the laser at the incident end of the beam reduced light by adjusting the screwing depth of the movable lens barrel in the fixed lens barrel, and adjust the focal length of the laser at the output end of the beam reduced light by adjusting the position of the convex lens in the fixed lens barrel by a first locking nut and an elastic member. The structure is simple, the laser focal length can be adjusted conveniently and quickly, and the focusing is accurate, so that the laser spot formed by the beam reducer can be completely imaged onto the collimating mirror surface in the spectrometer. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification, are used to explain the principles of the present disclosure. Obviously, the drawings described below are only some embodiments of the present disclosure, and those skilled in the art can derive other drawings based on these drawings without inventive effort.
[0021] Figure 1 This is an overall schematic diagram of an adjustable focal length beam reducer in one embodiment of the present disclosure;
[0022] Figure 2 This is a perspective structural diagram of an adjustable focal length beam reducer in one embodiment of the present disclosure;
[0023] Figure 3 A diagram showing the position of a lens of an adjustable focal length beam reducer in one embodiment of the present disclosure;
[0024] Figure 4 This is a left view of an adjustable focal length beam reducer in one embodiment of the present disclosure.
[0025] Description of reference numerals:
[0026] 1. Fixed lens barrel; 2. Movable lens barrel; 3. Convex lens; 4. First lens; 5. Second lens; 6. Light beam reduction; 7. First locking nut; 8. Mounting slot; 9. Elastic member; 10. Second locking nut; 11. Third locking nut; 12. Coaxial connector; 13. Fiber optic plug; 14. Bolt hole. DETAILED DESCRIPTION
[0027] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent identical or similar structures, and thus their detailed descriptions will be omitted. Furthermore, the figures are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.
[0028] Although relative terms such as "upper" and "lower" are used in this specification to describe the relationship of one illustrated component to another, these terms are used herein for convenience only, such as in accordance with the orientation of the illustrations in the accompanying drawings. It will be understood that if the illustrated device were flipped upside down, the component described as "upper" would become the component "lower." When a structure is referred to as "on" another structure, this may mean that the structure is integrally formed with the other structure, that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via the other structure.
[0029] The terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express open-ended inclusion and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.; the terms "first", "second" and "third" etc. are used only as labels and are not intended to limit the quantity of their objects.
[0030] The present disclosure provides a focal length adjustable beam reducer. Figure 1 and Figure 2 , including a fixed lens barrel 1 and a movable lens barrel 2 arranged in sequence, a convex lens 3 is movably arranged in the fixed lens barrel 1, a first lens 4 is arranged at one end of the movable lens barrel 2, and a second lens 5 is arranged at the other end of the movable lens barrel 2; one end of the movable lens barrel 2 is threadedly installed in the fixed lens barrel 1 to adjust the focal length of the laser at the incident end of the contraction light 6; the convex lens 3 can be moved along the axial direction in the fixed lens barrel 1 to adjust the focal length of the laser at the output end of the contraction light 6.
[0031] In the embodiment of the present disclosure, the adjustable focal length beam reducer consists of a fixed lens barrel 1 and a movable lens barrel 2 arranged in sequence. The movable lens barrel 2 is threadedly installed at one end of the fixed lens barrel 1, and a convex lens 3 is movably installed in the fixed lens barrel 1. A first lens 4 and a second lens 5 are respectively installed at both ends of the movable lens barrel 2. By adjusting the screw-in depth of the movable lens barrel 2 in the fixed lens barrel 1, the focal length of the laser at the incident end of the beam reduction light 6 is changed. By adjusting the position of the convex lens 3 in the fixed lens barrel 1, the focal length of the laser at the output end of the beam reduction light 6 is changed.
[0032] Compared with the existing optical debugging method of the beam reducer, the adjustable focal length beam reducer adjusts the focal length of the laser at the incident end of the beam reduced light by adjusting the screwing depth of the movable lens barrel in the fixed lens barrel, and adjusts the focal length of the laser at the output end of the beam reduced light by adjusting the position of the convex lens in the fixed lens barrel. It has a simple structure, convenient and fast adjustment of the laser focal length, and accurate focusing, so that the laser spot formed by the beam reducer can be completely imaged into the collimating mirror in the spectrometer.
[0033] In one embodiment of the present disclosure, see Figure 2 A first locking nut 7 is threadedly mounted on the side of the fixed lens barrel 1 away from the movable lens barrel 2. A mounting groove 8 is provided on the side of the fixed lens barrel 1 close to the movable lens barrel 2. An elastic member 9 is disposed in the mounting groove 8. The convex lens 3 is located between the first locking nut 7 and the elastic member 9. The convex lens 3 is disposed on the first locking nut 7, and the elastic member 9 is in contact with the convex lens 3. In this way, the position of the convex lens 3 in the fixed lens barrel 1 can be adjusted by adjusting the screw-in depth of the first locking nut 7. The elastic member 9 moves smoothly in the fixed lens barrel 1, thereby adjusting the focal length of the laser beam at the output end of the contracted beam 6.
[0034] In one example, the elastic member 9 is a compression spring.
[0035] In another example, the elastic member 9 is an elastic rubber tube.
[0036] In one embodiment of the present disclosure, the convex lens 3 is fixed to the first locking nut 7 by ultraviolet glue. In this way, the convex lens 3 can be installed on the first locking nut 7, and the position of the convex lens 3 can be easily changed by the first locking nut 7.
[0037] In one embodiment of the present disclosure, see Figure 2 One of the first lens 4 and the second lens 5 is fixed to the movable lens barrel 2 with ultraviolet glue, and the other of the first lens 4 and the second lens 5 is installed in the movable lens barrel 2 with a second locking nut 10; the second locking nut 10 is threadedly installed in the movable lens barrel 2. In this way, the first lens 4 and the second lens 5 can be installed in the movable lens barrel 2, and at the same time, the distance between the first lens 4 and the second lens 5 can be adjusted, thereby further adjusting the focal length of the incident laser beam 6.
[0038] In one example, the first lens 4 is mounted in the movable lens barrel 2 at an end away from the fixed lens barrel 1 , and the second lens 5 is mounted in the movable lens barrel 2 at an end close to the fixed lens barrel 1 .
[0039] In another example, the first lens 4 is installed in the movable lens barrel 2 at one end close to the fixed lens barrel 1 , and the second lens 5 is installed in the movable lens barrel 2 at one end away from the fixed lens barrel 1 .
[0040] In one embodiment of the present disclosure, see Figure 1 and Figure 2 A third locking nut 11 is threadedly mounted on the movable lens barrel 2 and is located between the fixed lens barrel 1 and the movable lens barrel 2. This allows the fixed lens barrel 1 and the movable lens barrel 2 to be fixed after focusing, preventing the position of the movable lens barrel 2 from changing, preventing changes in the focal length of the beam reducer, and improving the accuracy of focal length adjustment.
[0041] In one embodiment of the present disclosure, see Figure 1 and Figure 2 The third locking nut 11 has anti-slip grooves evenly distributed on its circumferential outer wall. In this way, the third locking nut 11 can be easily rotated.
[0042] In one embodiment of the present disclosure, see Figure 1 and Figure 2 The end of the movable lens barrel 2 away from the fixed lens barrel 1 is provided with a coaxial connector 12, and the end of the coaxial connector 12 away from the movable lens barrel 2 is detachably provided with an optical fiber plug 13. In this way, the optical fiber plug 13 can be installed on the beam reducer to achieve focusing of the laser emitted by the optical fiber plug 13 through the beam reducer.
[0043] Optionally, the coaxial connector 12 is an SMA socket.
[0044] In one embodiment of the present disclosure, the coaxial connector 12 is threadedly mounted in the movable lens barrel 2, and the coaxial connector 12 and the movable lens barrel 2 are connected by bolts. In this way, the coaxial connector 12 can be mounted on the movable lens barrel 2, and the stability of the installation of the coaxial connector 12 and the optical fiber plug 13 can be improved.
[0045] In one embodiment of the present disclosure, see Figure 4 The end of the fixed lens barrel 1 away from the movable lens barrel 2 has multiple bolt holes 14 evenly distributed along the circumference. In this way, the fixed lens barrel 1 can be installed on the spectrometer housing so that the focused beam 6 is aligned with the incident slit on the spectrometer housing, and the laser spot formed by the focused beam mirror is completely imaged onto the collimating mirror surface in the spectrometer.
[0046] In one embodiment of the present disclosure, the beam reducer includes two symmetrically arranged fixed lens barrels 1. In this way, the focal length of the laser can be adjusted by adjusting the relative positions of the two convex lenses 3.
[0047] In one embodiment of the present disclosure, the beam reducer includes two symmetrically arranged movable lens barrels 2. Thus, by adjusting the relative positions of the two movable lens barrels 2, the focal length of the laser can be adjusted.
[0048] In one embodiment of the present disclosure, see Figures 1 to 4 The working process of the adjustable focal length beam reducer is briefly described as follows:
[0049] When the present invention is in use, first install the first lens 4 and the second lens 5 in the movable lens barrel 2, install the third locking nut 11 on the movable lens barrel 2, install the optical fiber plug 13 on the movable lens barrel 2 through the coaxial connector 12, install the convex lens 3 in the fixed lens barrel 1 through the first locking nut 7 and the elastic member 9, screw the movable lens barrel 2 into the fixed lens barrel 1, and adjust the focal length of the laser at the incident end of the contracted light 6 by adjusting the screw-in depth of the movable lens barrel 2. When the position adjustment of the movable lens barrel 2 is completed, rotate the third locking nut 11 to fix the fixed lens barrel 1 and the movable lens barrel 2, and adjust the position of the convex lens 3 in the fixed lens barrel 1 by adjusting the screw-in depth of the first locking nut 7 to adjust the focal length of the laser at the output end of the contracted light 6. When the laser focal length adjustment is completed, fix the fixed lens barrel 1 on the spectrometer housing so that the contracted light 6 is aligned with the incident slit on the spectrometer housing, and the laser spot formed by the contraction mirror is completely imaged onto the collimating mirror surface in the spectrometer.
[0050] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the utility model disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the appended claims.
Claims
1. A focal length adjustable beam reducer, characterized in that: The invention comprises a fixed lens barrel (1) and a movable lens barrel (2) which are arranged in sequence, wherein a convex lens (3) is movably arranged in the fixed lens barrel (1), a first lens (4) is arranged at one end of the movable lens barrel (2), and a second lens (5) is arranged at the other end of the movable lens barrel (2); One end of the movable lens barrel (2) is threadedly mounted in the fixed lens barrel (1) to adjust the focal length of the laser at the incident end of the contraction light (6); the convex lens (3) is movable along the axial direction in the fixed lens barrel (1) to adjust the focal length of the laser at the exit end of the contraction light (6).
2. The adjustable focal length beam reducer according to claim 1, wherein: A first locking nut (7) is threadedly mounted on a side of the fixed lens barrel (1) away from the movable lens barrel (2); a mounting groove (8) is provided on a side of the fixed lens barrel (1) close to the movable lens barrel (2); an elastic member (9) is provided in the mounting groove (8); the convex lens (3) is located between the first locking nut (7) and the elastic member (9); the convex lens (3) is arranged on the first locking nut (7), and the elastic member (9) is in contact with the convex lens (3).
3. The adjustable focal length beam reducer according to claim 2, wherein: The convex lens (3) is fixed to the first locking nut (7) by ultraviolet glue.
4. The adjustable focal length beam reducer according to claim 1, wherein: One of the first lens (4) and the second lens (5) is fixed in the movable lens barrel (2) by ultraviolet glue, and the other of the first lens (4) and the second lens (5) is installed in the movable lens barrel (2) by a second locking nut (10).
5. The adjustable focal length beam reducer according to claim 4, characterized in that: The second locking nut (10) is threadedly mounted in the movable lens barrel (2).
6. The adjustable focal length beam reducer according to claim 1, wherein: A third locking nut (11) is threadedly mounted on the movable lens barrel (2), and the third locking nut (11) is located between the fixed lens barrel (1) and the movable lens barrel (2).
7. The adjustable focal length beam reducer according to claim 6, wherein: Anti-slip grooves are evenly distributed on the circumferential outer wall of the third locking nut (11).
8. The adjustable focal length beam reducer according to claim 1, wherein: A coaxial connector (12) is provided at one end of the movable lens barrel (2) away from the fixed lens barrel (1), and a fiber optic plug (13) is detachably provided at one end of the coaxial connector (12) away from the movable lens barrel (2).
9. The adjustable focal length beam reducer according to claim 8, characterized in that: The coaxial connector (12) is threadedly mounted in the movable lens barrel (2), and the coaxial connector (12) and the movable lens barrel (2) are connected via bolts.
10. The adjustable focal length beam reducer according to claim 1, wherein: One end of the fixed lens barrel (1) away from the movable lens barrel (2) is provided with a plurality of bolt holes (14) evenly distributed along the circumference.