CN114509878A - Light spot focusing and shaping lens cone and method and application thereof - Google Patents
Light spot focusing and shaping lens cone and method and application thereof Download PDFInfo
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- CN114509878A CN114509878A CN202011282200.2A CN202011282200A CN114509878A CN 114509878 A CN114509878 A CN 114509878A CN 202011282200 A CN202011282200 A CN 202011282200A CN 114509878 A CN114509878 A CN 114509878A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
- G02B27/095—Refractive optical elements
- G02B27/0955—Lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
- G02B27/095—Refractive optical elements
- G02B27/0972—Prisms
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Abstract
The invention discloses a facula focusing shaping lens cone and a method and application thereof, comprising the following steps: the focusing seat, a first lens group arranged in the focusing seat, a lens cone arranged at the light-emitting side of the focusing seat and a second lens group and a first lens group arranged in the lens cone are arranged at the light-entering end of the cavity; the first lens group comprises a second lens frame and a first lens frame, one end of the second lens frame is connected with the light-emitting side of the optical fiber interface, an aspheric lens is installed in the second lens frame, and a Powell prism is installed in the first lens frame; the interior of the lens cone is hollow so as to form an optical cavity, and the second lens group comprises double cemented lenses and a diaphragm. The focusing seat is in threaded connection with the lens cone, the external optical fiber head is connected with the optical fiber interface, the light beam is adjusted into line light through the first lens group, then the line light is adjusted into required light spots through the second lens group, and the required square light spots with specific sizes and uniform power distribution are obtained through the distance between the Baville prism of the focusing seat and the double cemented lenses and are matched with the laser optical fiber in transmission.
Description
Technical Field
The invention belongs to the technical field of spot shaping, and particularly relates to a spot focusing shaping lens barrel and a method and application thereof.
Background
In specific experiment, the area that needs the laser action region is as big as possible, and even no dark space, and in the in-service use, the circular facula of fiber transmission laser shape for dispersing, current shaping device is circular facula plastic mostly, can not accomplish the change of facula shape, current shaping device forms circular facula multiple reflection in later stage experimental use after the shaping of laser shape, the circular facula through multiple reflection meets and the dark space that can't cover appears in the laser action region that forms, the dark space that has bigger area can reduce the coverage area in laser action region.
Therefore, in order to solve the above technical problems, it is necessary to design a spot focusing and shaping lens barrel for fiber light emission, which can adjust the light emitted from the fiber so that the light action region has no dark region.
Disclosure of Invention
The invention aims to provide a light spot focusing and shaping lens cone which is simple in structure, can adjust the light emitted from an optical fiber into square light spots and can provide a light action area without dark areas for subsequent experiments.
Another object of the present invention is to provide a method of spot focusing shaping lens barrel.
Another object of the present invention is to provide an application of the spot focusing shaping lens barrel.
The technical scheme of the invention is as follows:
a spot focusing shaping barrel comprising: the focusing device comprises a focusing seat, a first lens group arranged in the focusing seat, a lens cone arranged on the light-emitting side of the focusing seat and a second lens group arranged in the lens cone, wherein the focusing seat is rotatably connected with the lens cone so as to adjust the distance between the first lens group and the second lens group;
an optical fiber interface is installed at the light inlet end of the focusing seat and used for being in butt joint with an external optical fiber head to input light beams, a cavity is formed inside the focusing seat, and the first lens group is installed at the light inlet end of the cavity;
the first lens group comprises a second lens frame and a first lens frame, one end of the second lens frame is connected with the light-emitting side of the optical fiber interface, the other end of the second lens frame is connected with the first lens frame, an aspheric lens is installed in the second lens frame, a Powell prism is installed in the first lens frame, and a first prism pressing ring is installed on the light-emitting side of the first lens frame and used for fixing the Powell prism;
the inner part of the lens cone is hollow to form an optical cavity, and a plurality of grooves are formed on the inner wall of the light outlet side of the optical cavity and used for mounting a second lens group;
the second lens group comprises a double cemented lens and a diaphragm, the double cemented lens comprises a convex lens and a concave lens, the double cemented lens is clamped in the groove, and a second prism pressing ring is installed on the light-emitting side of the concave lens and used for fixing the double cemented lens.
In the technical scheme, the outer side of the bottom of the first mirror frame is provided with an external thread, the top of the second mirror frame is provided with an internal thread matched with the external thread, and the first mirror frame is in threaded connection with the second mirror frame.
In the above technical solution, the distance between the aspherical mirror and the powell prism is 7.8 mm.
In the above technical solution, the focal length of the aspherical mirror is 4.51 mm.
In the above technical solution, the angle θ of the powell prism is 110 °.
In the technical scheme, the distance between the Bawell prism and the double cemented lens is 200mm +/-5 mm, and the square light spot with the required size is obtained by adjusting the distance between the Bawell prism and the double cemented lens through the focusing seat.
In the technical scheme, the diameter of the double-cemented lens is 60mm, wherein the convex lens is made of K9, the two-sided curvature radii are 140.5mm and-98.3078 mm respectively, the thickness is 11mm, the concave lens is made of ZF6, the two-sided curvature radii are-98.3078 mm and-299.2 mm respectively, and the thickness is 6.15 mm.
In the above technical scheme, the bottom end of the focusing base is in threaded connection with the top end of the lens barrel.
In the above technical solution, the total length of the shaping lens barrel is 255mm, and the outer diameter is 66 mm.
In the above technical solution, the size of the diaphragm is 50 × 20 mm.
A method for a spot focusing shaping lens barrel, comprising the steps of:
(1) the optical fiber interface is in butt joint with an external optical fiber head, light beams are input into the focusing seat from the optical fiber interface, and the position between the focusing seat and the lens cone is adjusted;
(2) the light beam enters an aspheric lens in the focusing seat, the light beam is converted into parallel light through the aspheric lens, and then the parallel light is converted into line light through a Powell prism;
(3) and (3) irradiating the linear light in the step (2) into the double-cemented lens through the optical cavity of the lens barrel, and converting the linear light into square light spots through the double-cemented lens and the diaphragm.
The utility model provides an application of facula focus plastic lens cone in experimental system is collected in plastic, experimental system is collected in plastic includes plastic lens cone and two optical cavity of turning back that are used for the facula of turning back, and two optical cavity of turning back set up relatively, are close to the logical unthreaded hole of installing the rectangle parallel with the light-emitting side of plastic lens cone on the optical cavity of turning back of plastic lens cone one side, are equipped with four reflection lenses that from top to bottom parallel arrangement on every optical cavity of turning back and correspond and install the adjusting part who is used for adjusting the lens position on the reflection lens.
The invention has the advantages and positive effects that:
1. the focusing seat is in threaded connection with the lens cone, the external optical fiber head is connected with the optical fiber interface, the light beam is adjusted into line light through the first lens group, then the line light is adjusted into required light spots through the second lens group, and the distance between the Baville prism and the double-cemented lens is adjusted through the focusing seat so as to obtain the required square light spots with specific sizes and uniform power distribution and is matched with the laser optical fiber transmission.
2. The square light spot emitted by the shaping lens cone can be fully paved on the whole laser action plane after being butted with a measurement experiment system, compared with the traditional circular light spot, the problem of a plurality of dark areas caused by the connection of the circular light spots is solved, the square light spot enables no dark area to exist in the laser action plane, and the laser utilization rate is effectively improved.
Drawings
FIG. 1 is a schematic structural diagram of a spot focusing and shaping lens barrel according to the present invention;
in the figure:
1. focusing seat 2, second mirror holder 3, powell prism
4. Optical fiber interface 5, first prism clamping ring 6 and first mirror bracket
7. Aspheric lens 8, optical cavity 9 and lens barrel
10. Mounting nut 11, diaphragm 12, convex lens
13. Concave lens 14, second prism clamping ring
Detailed Description
The present invention will be described in further detail with reference to specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the scope of the invention in any way.
Example 1
As shown in the drawings, the spot focusing shaping lens barrel of the present invention includes: the focusing device comprises a focusing seat 1, a first lens group arranged in the focusing seat 1, a lens cone arranged on the light emitting side of the focusing seat 1 and a second lens group arranged in the lens cone, wherein the focusing seat is rotatably connected with the lens cone to adjust the distance between the first lens group and the second lens group;
an optical fiber interface 4 (the type is SMA905 optical fiber interface 4) is installed on the light inlet end of the focusing seat 1 and used for being in butt joint with an external optical fiber head to input light beams, a cavity is formed inside the focusing seat 1, and the first lens group is installed at the light inlet end of the cavity;
the first lens group comprises a second lens frame 2 and a first lens frame 6, one end of the second lens frame 2 is connected with the light-emitting side of the optical fiber interface 4, the other end of the second lens frame is connected with the first lens frame 6, an aspheric lens 7 is installed in the second lens frame 2, a Powell prism 3 is installed in the first lens frame 6, and a first prism pressing ring 5 is installed on the light-emitting side of the first lens frame 6 and used for fixing the Powell prism 3;
the interior of the lens cone is hollow to form an optical cavity 8, and a plurality of grooves are formed on the inner wall of the light outlet side of the optical cavity 8 and used for mounting a second lens group;
the second lens group comprises a double cemented lens and a diaphragm 11, the double cemented lens comprises a convex lens 12 and a concave lens 13, the double cemented lens is clamped in the groove, a second prism pressing ring 14 is installed on the light emitting side of the concave lens 13 to fix the double cemented lens, and the diaphragm 11 is installed in the light cavity 8 through an installation nut 10.
Further, an external thread is formed on the outer side of the bottom of the first lens frame 6, an internal thread matched with the external thread is formed on the top of the second lens frame 2, and the first lens frame 6 is in threaded connection with the second lens frame 2.
Further, the distance between the aspherical mirror and the powell prism 3 is 7.8 mm.
Further, the focal length of the aspherical mirror is 4.51 mm.
Further, the angle θ of the powell prism 3 is 110 °.
Further, the distance between the powell prism 3 and the double cemented lens is 200mm ± 5mm, and the square light spot with the required size is obtained by using the focusing seat to receive the distance between the powell prism and the double cemented lens.
Further, the diameter of the double cemented lens is 60mm, wherein the convex lens 12 is made of K9, the two-sided curvature radius is 140.5mm and-98.3078 mm respectively, the thickness is 11mm, the concave lens 13 is made of ZF6, the two-sided curvature radius is-98.3078 mm and-299.2 mm respectively, and the thickness is 6.15 mm.
Further, the bottom end of the focus adjusting base 1 is in threaded connection with the top end of the lens barrel.
Further, the total length of the shaping lens barrel is 255mm, and the outer diameter of the shaping lens barrel is 66 mm.
Further, the size of the diaphragm 11 is 50 × 20 mm.
Example 2
On the basis of embodiment 1, the method for spot focusing and shaping the lens barrel according to embodiment 1 of the present invention includes the following steps:
(1) the optical fiber interface 4 is butted with an external optical fiber head (the diameter of an optical fiber core is 910 mu m, and the numerical aperture is 0.22), light beams are input into the focusing seat 1 from the optical fiber interface 4, and the position between the focusing seat 1 and the lens barrel is adjusted;
(2) the light beam enters an aspheric lens in the focusing seat 1, the light beam is converted into parallel light through the aspheric lens 7, and then the parallel light is converted into line light through the Powell prism 3;
(3) and (3) irradiating the linear light in the step (2) into the double-cemented lens through the optical cavity 8 of the lens barrel, and converting the linear light into square light spots through the double-cemented lens.
Example 3
On the basis of embodiment 1, the light spot focusing shaping lens barrel disclosed by the invention is applied to a shaping and collecting experimental system, wherein the collecting experimental system comprises a shaping lens barrel and two turn-back optical cavities 8 for turning back light spots, the two turn-back optical cavities 8 are arranged oppositely, a rectangular light through hole parallel to the light emitting side of the shaping lens barrel is arranged on the turn-back optical cavity close to one side of the shaping lens barrel, and each turn-back optical cavity 8 is provided with four reflecting lenses arranged in parallel from top to bottom and an adjusting component correspondingly arranged on the reflecting lenses and used for adjusting the positions of the reflecting lenses.
Further, the distance between the two folded optical cavities 8 is 600 mm.
In the experiment is collected in the plastic, adjustment plastic lens cone is connected with outside light head, from the square facula of emergence in the plastic lens cone, and install the plastic lens cone that will adjust out required square facula on optical platform's base, the horizontal dimension of adjustment base, the direction of emergence and the optical platform that makes the square facula of effluvium keep the level, install optical platform's required installation hole site respectively with two optical cavity 8 of turning back, adjust the height of optical cavity 8 of turning back, so that the square facula of emergence can get into smoothly in the clear opening, then respectively through the position of adjusting part adjustment reflection lens, make the square facula turn back and form and predetermine the effect, so that the better distribution of facula, in order to improve the ionization rate of flight atomic beam.
Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.
The invention has been described in an illustrative manner, and it is to be understood that any simple variations, modifications or other equivalent changes which can be made by one skilled in the art without departing from the spirit of the invention fall within the scope of the invention.
Claims (10)
1. A spot focusing shaping lens barrel is characterized in that: the focusing device comprises a focusing seat, a first lens group arranged in the focusing seat, a lens cone arranged on the light emitting side of the focusing seat and a second lens group arranged in the lens cone, wherein the focusing seat is rotationally connected with the lens cone so as to adjust the distance between the first lens group and the second lens group;
an optical fiber interface is installed on the light inlet end of the focusing seat and used for being in butt joint with an external optical fiber head to input light beams, a cavity is formed inside the focusing seat, and the first lens group is installed at the light inlet end of the cavity;
the first lens group comprises an aspheric lens and a Powell prism;
the inner part of the lens cone is hollow to form an optical cavity, and a plurality of grooves are formed on the inner wall of the light outlet side of the optical cavity and used for mounting a second lens group;
the second lens group comprises a double cemented lens and a diaphragm, the double cemented lens comprises a convex lens and a concave lens, the double cemented lens is clamped in the groove, and a second prism pressing ring is arranged on the light-emitting side of the concave lens and used for fixing the double cemented lens, so that divergent light emitted by the optical fiber head passes through the aspheric lens, the Bawell prism, the double cemented lens and the diaphragm in sequence and is converted into square light spots.
2. The spot focusing shaping barrel according to claim 1, characterized in that: the first lens group further comprises a second lens frame and a first lens frame, one end of the second lens frame is connected with the light-emitting side of the optical fiber interface, the other end of the second lens frame is connected with the first lens frame, the aspheric lens is installed in the second lens frame, the Bawell prism is installed in the first lens frame, and a first prism pressing ring is installed on the light-emitting side of the first lens frame and used for fixing the Bawell prism.
3. The spot focusing shaping barrel according to claim 2, characterized in that: the bottom outside of first mirror holder is formed with the external screw thread, the top of second mirror holder is formed with the internal thread with this external screw thread matched with, first mirror holder and second mirror holder threaded connection.
4. The spot focusing shaping barrel according to claim 3, characterized in that: the distance between the aspherical mirror and the Bawell prism is 7.8 mm.
5. The spot focusing shaping barrel according to claim 4, characterized in that: the distance between the Bawell prism and the double cemented lens is 200mm +/-5 mm, and the square light spot with the required size is obtained by adjusting the distance between the Bawell prism and the double cemented lens through the focusing seat.
6. The spot focusing shaping barrel according to claim 5, wherein: the bottom end of the focusing seat is in threaded connection with the top end of the lens cone.
7. The spot focusing shaping barrel according to claim 6, wherein: the total length of the shaping lens barrel is 255mm, and the outer diameter of the shaping lens barrel is 66 mm.
8. The spot focusing shaping barrel according to claim 7, wherein: the size of the diaphragm is 50 x 20 mm.
9. A method of using the spot focus shaping barrel of claim 8, comprising the steps of:
(1) the optical fiber interface is in butt joint with an external optical fiber head, light beams are input into the focusing seat from the optical fiber interface, and the position between the focusing seat and the lens cone is adjusted;
(2) the light beam enters an aspheric lens in the focusing seat, the light beam is converted into parallel light through the aspheric lens, and then the parallel light is converted into line light through a Powell prism;
(3) and (3) irradiating the linear light in the step (2) into the double-cemented lens through the optical cavity of the lens barrel, and converting the linear light into square light spots through the double-cemented lens and the diaphragm.
10. Use of the spot focusing shaping barrel of claim 8 in a shaped collection experiment system, wherein: the shaping collection experiment system comprises a shaping lens barrel and two light cavities which are used for turning back light spots, wherein the two light cavities which are turned back are arranged oppositely, a light through hole which is parallel to the light emitting side of the shaping lens barrel is arranged on the light cavity which is close to one side of the shaping lens barrel and is turned back, and four reflecting lenses which are arranged in parallel from top to bottom and an adjusting component which is correspondingly arranged on the reflecting lenses and is used for adjusting the positions of the reflecting lenses are arranged on each light cavity which is turned back.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011282200.2A CN114509878A (en) | 2020-11-16 | 2020-11-16 | Light spot focusing and shaping lens cone and method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011282200.2A CN114509878A (en) | 2020-11-16 | 2020-11-16 | Light spot focusing and shaping lens cone and method and application thereof |
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| Publication Number | Publication Date |
|---|---|
| CN114509878A true CN114509878A (en) | 2022-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011282200.2A Pending CN114509878A (en) | 2020-11-16 | 2020-11-16 | Light spot focusing and shaping lens cone and method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114509878A (en) |
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2020
- 2020-11-16 CN CN202011282200.2A patent/CN114509878A/en active Pending
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