Multiband focus-adjustable aspheric collimator

Abstract

The utility model discloses a multiband focus-adjustable aspheric collimator, which comprises an external thread sleeve, a lens cone slidably connected in the external thread sleeve, an aspheric lens arranged in the lens cone, an optical fiber connector supporting cylinder fixedly connected in the external thread sleeve, and an optical fiber connector arranged in the optical fiber connector supporting cylinder. A spring is arranged between the inner end face of the lens cone and the inner end face of the optical fiber connector, an inner threaded sleeve is arranged on the outer side of the outer threaded sleeve, a baffle ring is arranged at one end of the inner threaded sleeve, and the outer end face of the lens cone abuts against the inner bottom face of the baffle ring. According to the utility model, the spring is additionally arranged between the lens cone and the optical fiber connector, the inner threaded sleeve and the outer threaded sleeve are additionally arranged on the outer side of the lens cone, and the spring is stretched out and drawn back by rotating the inner threaded sleeve, so that the working distance between the aspheric lens and the optical fiber connector is adjusted, and collimation adjustment under different wave bands is realized.

Description

Technical Field

[0001] The utility model relates to a multi-band focus-adjustable aspheric collimator. Background Art

[0002] Aspheric mirrors are important in laser collimation, focusing, and laser-fiber coupling. The beam directly coming out of the laser is usually a Gaussian beam, but in practical applications, such as optical measurement, laser medical treatment, laser processing, etc., the laser beam needs to be collimated, focused, homogenized, etc. Among them, fiber collimators are the most widely used.

[0003] The main optical element of the fiber collimator is an aspheric lens, which has different convergence distances in different bands. During the manufacturing process, the lens is installed in the lens barrel, fixed to the fiber connector, and the working distance is adjusted and fixed to obtain a collimator at a specific point band. The disadvantage of this type of collimator is that it can only meet the collimation function in a single band and cannot be adjusted. Utility Model Content

[0004] The main purpose of the utility model is to provide a multi-band adjustable focus aspheric collimator to solve the problems raised in the above background technology.

[0005] The purpose of the utility model can be achieved by adopting the following technical solutions:

[0006] A multi-band adjustable focus aspheric collimator comprises an externally threaded sleeve, a lens barrel is slidably connected inside the externally threaded sleeve, an aspheric lens is arranged inside the lens barrel, an optical fiber joint support tube is fixedly connected inside the externally threaded sleeve, an optical fiber joint is arranged inside the optical fiber joint support tube, a spring is arranged between the inner end surface of the lens barrel and the inner end surface of the optical fiber joint, an internally threaded sleeve is arranged outside the externally threaded sleeve, a retaining ring is arranged at one end of the internally threaded sleeve, and the outer end surface of the lens barrel abuts against the inner bottom surface of the retaining ring.

[0007] Preferably, a positioning pin groove is provided on the outer wall of the lens barrel, a positioning pin is provided in the positioning pin groove, and an end of the positioning pin protrudes from the outer wall of the lens barrel.

[0008] Preferably, two positioning pins are provided, and the two positioning pins are on the outer wall of the lens barrel and evenly distributed along the circumference thereof.

[0009] Preferably, a sliding groove is provided at a position on the inner side of the externally threaded sleeve corresponding to the positioning pin along its length direction, and a portion of the positioning pin protruding from the outer wall of the lens barrel is arranged in the sliding groove.

[0010] Preferably, the length direction of the sliding groove is the same as the length direction of the external threaded sleeve.

[0011] Preferably, a locking ring is provided on the externally threaded sleeve at one side of the inner end surface of the internally threaded sleeve.

[0012] Beneficial technical effects of the utility model:

[0013] The utility model adds a spring between the lens barrel and the optical fiber connector, and adds an internal thread sleeve and an external thread sleeve on the outside of the lens barrel. The internal thread sleeve is rotated to expand and contract the spring, thereby adjusting the working distance between the aspheric lens and the optical fiber connector to achieve collimation adjustment in different bands. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A cross-sectional view of a collimator according to an embodiment of the present utility model;

[0015] Figure 2 A schematic diagram of the collimator structure of an embodiment of the utility model;

[0016] Figure 3 A front view of a collimator according to an embodiment of the present utility model;

[0017] Figure 4 It is a side view of a collimator according to an embodiment of the utility model.

[0018] In the figure: 1. Externally threaded sleeve; 2. Lens barrel; 3. Aspheric lens; 4. Optical fiber connector support tube; 5. Optical fiber connector; 6. Spring; 7. Internally threaded sleeve; 8. Retaining ring; 9. Positioning pin groove; 10. Positioning pin; 11. Sliding groove; 12. Locking ring. DETAILED DESCRIPTION

[0019] In order to make the technical solution of the present invention more clear and specific to those skilled in the art, the present invention is further described in detail below in conjunction with embodiments and drawings, but the implementation methods of the present invention are not limited thereto.

[0020] like Figure 1-Figure 4 As shown, the multi-band adjustable focus aspheric collimator provided in this embodiment includes an externally threaded sleeve 1, a lens barrel 2 is slidably connected inside the externally threaded sleeve 1, an aspheric lens 3 is arranged inside the lens barrel 2, an optical fiber connector support tube 4 is fixedly connected inside the externally threaded sleeve 1, an optical fiber connector 5 is arranged inside the optical fiber connector support tube 4, a spring 6 is arranged between the inner end surface of the lens barrel 2 and the inner end surface of the optical fiber connector 5, an internally threaded sleeve 7 is arranged outside the externally threaded sleeve 1, a retaining ring 8 is arranged at one end of the internally threaded sleeve 7, and the outer end surface of the lens barrel 2 abuts against the inner bottom surface of the retaining ring 8. When working, the internally threaded sleeve 7 is rotated inwardly or outwardly to compress or stretch the spring 6 of the lens barrel 2 to adjust the working distance between the aspheric lens 3 and the optical fiber connector 5, so as to realize the collimation adjustment under different bands.

[0021] In this embodiment, if Figure 1As shown, a positioning pin groove 9 is provided on the outer wall of the lens barrel 2, and a positioning pin 10 is provided in the positioning pin groove 9. The end of the positioning pin 10 protrudes from the outer wall of the lens barrel 2 to fix and limit the position of the lens barrel 2 to prevent the lens barrel 2 from rotating during adjustment.

[0022] In this embodiment, if Figure 1 As shown, two positioning pins 10 are provided, and the two positioning pins 10 are on the outer wall of the lens barrel 2 and evenly distributed along the circumference thereof to ensure a fixed limiting effect.

[0023] In this embodiment, if Figure 1 As shown, a sliding groove 11 is provided on the inner side of the external threaded sleeve 1 at a position corresponding to the positioning pin 10, and the portion of the positioning pin 10 protruding from the outer wall of the lens barrel 2 is provided in the sliding groove 11. The sliding groove 11 cooperates with the positioning pin 10 to provide a smooth moving path for the lens barrel 2 and prevent the lens barrel 2 from moving or rotating in any unexpected direction.

[0024] In this embodiment, if Figure 1 As shown, the length direction of the sliding groove 11 is the same as that of the external threaded sleeve 1 , limiting the lens barrel 2 to move only along the length direction of the external threaded sleeve 1 , that is, always being on the same axis as the optical fiber connector 5 .

[0025] In this embodiment, if Figure 1 As shown, a locking ring 12 is provided on the externally threaded sleeve 1 at one side of the inner end surface of the internally threaded sleeve 7. After the distance adjustment is completed, the locking ring 12 is rotated to make it close to the end surface of the internally threaded sleeve 7 to lock the position of the internally threaded sleeve 7.

[0026] To summarize, in this embodiment, a spring 6 is added between the lens barrel 2 and the optical fiber connector 5, and an internally threaded sleeve 7 and an externally threaded sleeve 1 are added to the outside of the lens barrel 2. The spring 6 is extended and retracted by rotating the internally threaded sleeve 7, thereby adjusting the working distance between the aspheric lens 3 and the optical fiber connector 5 to achieve collimation adjustment in different bands.

[0027] The above is only a further embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the scope disclosed by the present invention according to the technical solution and concept of the present invention, which fall within the protection scope of the present invention.

Claims

1. A multi-band adjustable focus aspheric collimator, characterized in that: The invention comprises an externally threaded sleeve (1), a lens barrel (2) being slidably connected inside the externally threaded sleeve (1), a non-spherical lens (3) being arranged inside the lens barrel (2), an optical fiber connector support cylinder (4) being fixedly connected inside the externally threaded sleeve (1), an optical fiber connector (5) being arranged inside the optical fiber connector support cylinder (4), a spring (6) being arranged between the inner end surface of the lens barrel (2) and the inner end surface of the optical fiber connector (5), an internally threaded sleeve (7) being arranged outside the externally threaded sleeve (1), a retaining ring (8) being arranged at one end of the internally threaded sleeve (7), and the outer end surface of the lens barrel (2) abutting against the inner bottom surface of the retaining ring (8).

2. The multi-band adjustable focus aspheric collimator according to claim 1, characterized in that: A positioning pin groove (9) is provided on the outer wall of the lens barrel (2), a positioning pin (10) is provided in the positioning pin groove (9), and an end of the positioning pin (10) protrudes from the outer wall of the lens barrel (2).

3. The multi-band adjustable focus aspheric collimator according to claim 2, characterized in that: Two positioning pins (10) are provided, and the two positioning pins (10) are on the outer wall of the lens barrel (2) and are evenly distributed along the circumference thereof.

4. The multi-band adjustable focus aspheric collimator according to claim 2, characterized in that: A sliding groove (11) is provided at a position on the inner side of the external threaded sleeve (1) corresponding to the positioning pin (10), and a portion of the positioning pin (10) protruding from the outer wall of the lens barrel (2) is arranged in the sliding groove (11).

5. The multi-band adjustable focus aspheric collimator according to claim 4, characterized in that: The length direction of the sliding groove (11) is the same as the length direction of the external threaded sleeve (1).

6. The multi-band adjustable focus aspheric collimator according to claim 1, characterized in that: A locking ring (12) is provided on the externally threaded sleeve (1) at one side of the inner end surface of the internally threaded sleeve (7).

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