CN209821512U

CN209821512U - Reflection type beam expander

Info

Publication number: CN209821512U
Application number: CN201920386332.6U
Authority: CN
Inventors: 杨朝鹏
Original assignee: Changzhou Mayna Photoelectric Technology Co Ltd
Current assignee: Changzhou Mayna Photoelectric Technology Co Ltd
Priority date: 2019-03-25
Filing date: 2019-03-25
Publication date: 2019-12-20
Anticipated expiration: 2029-03-25

Abstract

The utility model relates to a reflection type light beam expander, including rectangular base, the base upper surface is provided with one-level riser, second grade riser and the tertiary riser of being connected perpendicularly with the base, threaded connection has the light guiding pipe of wearing to locate the second grade riser on the second grade riser, the corresponding external screw thread that is provided with of light guiding pipe surface, the length of external screw thread is the same with the distance between one-level riser to the second grade riser, the light guiding pipe level sets up, in the tertiary riser is worn to locate by the one end of light guiding pipe, the light guiding pipe is located the one end fixedly connected with second grade speculum between one-level riser and the second grade riser, the second grade speculum is indent formula circular cone speculum, be provided with the one-level speculum on the one-level riser, the one-level speculum is evagination formula circular cone speculum. The utility model discloses have and carry out continuous electrodeless regulation and easy and simple to handle's effect to output beam.

Description

Reflection type beam expander

Technical Field

The utility model relates to an auxiliary device is used to laser belongs to the optical instrument field, especially relates to a reflection type beam expander.

Background

At present, a beam expander device is usually needed in scientific research and teaching experiments, and the beam expander is mainly used for realizing the diameter expansion of an input light beam. The beam expanders widely used today generally adopt the refraction principle to realize the diameter adjustment of input light beams, and the beam expander manufactured by adopting the refraction principle is generally divided into a keplerian type beam expander and a galileo type beam expander. The Kepler type beam expander adopts two convex lenses to expand the light path, and parallel light beams form a light beam energy convergence area between the two convex lenses. The galilean beam expander generally adopts a mode of combining a concave lens and a convex lens, for example, a beam is expanded, a parallel beam is diffused when passing through the concave lens, and the diffused beam is converged into a parallel beam through the convex lens, so that the function of expanding the diameter of the beam is realized, and similarly, the function of reducing the diameter of the beam can be realized by changing the direction of an input beam.

Among the prior art, chinese utility model patent that publication number is CN208207332U discloses a laser beam expander adjusting device, including anti-skidding base, fixed mounting has spiral height adjusting bracket on the anti-skidding base, spiral height adjusting bracket is connected with the control tube through the regulation portion, the regulation pole is connected to the control tube upper end, adjust the beam expanding lens or the beam expanding lens frame of two kinds of spiral apertures of pole both ends detachably installation, beam expanding lens frame can be used to connect can not with adjust pole lug connection's beam expanding lens. The utility model discloses simple structure, effect are obvious. By adjusting the adjusting screw of the screw height adjusting frame of the utility model, the height of the beam expanding lens can be conveniently and accurately adjusted; the assembly deviation of the conventional beam expander and the light source is effectively corrected by changing the rotation direction and fine adjustment of the adjusting screw; the utility model discloses an adjust the pole and expand the beam lens of arbitrary specification of beam lens frame assembly, the adjustable range of beam lens height is big, and application scope is wide.

The above prior art solutions have the following drawbacks: in the process of actual use, the position accuracy requirement of each beam expanding lens in the device is higher for the refraction type beam expander, and when the diameter of the output light beam needs to be adjusted on a large scale, the diameter of the output light beam often needs to be adjusted through changing different beam expanding lenses, so that the operation difficulty is improved, and the using process is not simple and convenient enough.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a reflection type beam expander can carry out the electrodeless regulation on a large scale to output beam, and accommodation process is easy and simple to handle.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides a reflection type beam expander, includes rectangular base, the base upper surface is provided with one-level riser, second grade riser and the tertiary riser of being connected perpendicularly with the base, threaded connection has the light guiding pipe of wearing to locate the second grade riser on the second grade riser, the corresponding external screw thread that is provided with of light guiding pipe outer surface, the length of external screw thread is the same with the distance between one-level riser to the second grade riser, the light guiding pipe level sets up, the one end of light guiding pipe is worn to locate in the tertiary riser, the light guiding pipe is located the one end fixedly connected with second grade speculum between one-level riser and the second grade riser, the second grade speculum is indent formula circular cone speculum, be provided with the one-level speculum on the one-level riser, the one-level speculum is outer convex circular cone speculum.

Through adopting above-mentioned technical scheme, outside input light beam gets into from the light guide pipe along the direction of tertiary riser to one-level riser, and input light beam shines to the one-level speculum through the second grade speculum on, and the one-level speculum is convex circular cone reflecting mirror, and input light beam reflects to the second grade speculum through the one-level speculum, and input light beam finally forms the output light beam that the diameter increases through the second grade speculum reflection, accomplishes the beam expanding process to input light beam. The diameter of the output light beam can be changed by a worker through rotating the light guide tube, and when the primary reflector moves towards the direction close to the secondary reflector, the diameter of the output light beam is reduced; when the first-stage reflector moves towards the direction far away from the second-stage reflector, the diameter of the output light beam can be increased, the second-stage reflector can freely move between the first-stage vertical plate and the second-stage vertical plate due to the arrangement of the external thread distance, the adjusting mode is simple and convenient, continuous stepless adjustment of the diameter of the output light beam can be achieved, and the lens does not need to be replaced additionally.

The utility model discloses further set up to, the second grade speculum includes first light trap and second light trap, the diameter of second light trap is 1/2 to 1/5 of light guide diameter, the diameter of first light trap is 1 to 1.5 times of light guide diameter, form the second grade plane of reflection between first light trap and the second light trap, the second light trap is towards the light guide setting.

By adopting the technical scheme, the input light beam in the light guide tube forms a circular light spot with the diameter identical to that of the second light hole through the second light hole, the input light beam irradiates on the reflecting surface of the primary reflector, and the reflected light beam reaches the secondary reflecting surface, so that the final output light beam is a parallel light beam.

The utility model discloses further set up to, the last beam expanding delivery outlet of having seted up of one-level riser, the diameter of beam expanding delivery outlet is the same with the diameter of second light trap, the central point that the one-level speculum set up the beam expanding delivery outlet puts, a plurality of connecting rods of fixedly connected with between one-level speculum and the beam expanding delivery outlet inner wall, the external conical surface of one-level speculum is the one-level plane of reflection, the bottom surface diameter of one-level speculum is the same with the diameter of second light trap, the central axis of one-level speculum, second grade speculum and light trap all coincides, the conical surface slope degree of one-level plane of reflection and second grade plane of reflection is the same.

By adopting the technical scheme, the light spot formed by the input light beam passing through the second light transmitting hole completely irradiates to the primary reflecting surface, and the primary reflecting surface can completely reflect the received light beam to the secondary reflecting surface. The setting of connecting rod can realize the rigidity to one-level speculum, and simultaneously, the output beam through the reflection of second grade plane can receive when the connecting rod shelters from. Because the output light beam is influenced by the diffuse reflection effect of dust in the air when being transmitted in the air, the light spot of the output light beam finally irradiated on the surface of the object is a complete light spot, namely, the transmission of the output light beam cannot be substantially influenced by the arrangement of the connecting rod.

The utility model discloses further set up to, the connecting rod is provided with 2 to 5, and is adjacent interval angle between the connecting rod is the same, the width of connecting rod is 1/30 to 1/50 for expanding beam outlet girth, the connecting rod adopts the printing opacity material to make.

Through adopting above-mentioned technical scheme, for making the connecting rod can not form too big sheltering from to output beam when realizing stably fixing to the one-level speculum, the quantity of connecting rod is 2 to 5, and the width of connecting rod compares for a short time with the girth of expanding the beam delivery outlet, and the connecting rod that the equipartition set up can be so that the atress of one-level speculum is even, and its structure is also more stable. The connecting rod is made of a light-transmitting material, so that the shielding effect of the connecting rod on the output light beam can be further reduced.

The utility model discloses further set up to, the both ends of connecting rod are formed with the reinforced section.

Through adopting above-mentioned technical scheme, because of reducing the consideration of connecting rod to the effect of sheltering from of output beam, the width of connecting rod sets up less, leads to its self intensity to descend, and the setting of consolidating the section can improve the structural stability of connecting rod self.

The utility model discloses further set up to, be equipped with the guide post that a plurality of levels set up between one-level riser and the second grade riser, the guide post uses the light guide pipe the central axis to be central symmetry setting as the line of symmetry, sliding connection has the level four riser on the guide post, the level four riser is located between one-level riser and the second grade riser, level four riser central point puts and offers the mounting hole that is used for supporting the light guide pipe, second grade speculum fixed connection is in the one side that the level four riser is close to the one-level riser.

Through adopting above-mentioned technical scheme, the light guide tube and secondary reflector all are fixed with the level four riser, can drive level four riser simultaneous movement when the light guide tube removes, the removal orbit of level four riser receives the guide effect of guide post, it is more steady when the above-mentioned setting can make the light guide tube remove, and reduce rocking that the light guide tube axis takes place at the removal in-process, thereby make operating personnel adjust the in-process of output beam diameter size, the facula that the output beam formed is difficult for producing irregular skew. Meanwhile, the output light can be completely reflected by the first-level reflecting surface, and the energy loss possibly generated in the refraction process of the input light beam is reduced.

The utility model discloses further set up to, level four riser is provided with the level four bearing with the junction of drawing the fluorescent tube, level three riser is provided with tertiary bearing with the junction of drawing the fluorescent tube.

Through adopting above-mentioned technical scheme, the rotation process that can make the light guide tube is more smooth steady in the setting of level four bearing and tertiary bearing, has further improved the beam expanding effect of beam expander, has improved the comfortable degree when operating personnel uses the device simultaneously.

The utility model discloses further set up as, the one end that tertiary riser was kept away from to the light guide pipe is formed with the light guide plate of expanding.

Through adopting above-mentioned technical scheme, the setting of light guide plate can make more light enter into in the light guide pipe to improve output beam's luminous energy, make the facula luminance that output beam formed obtain improving.

The utility model discloses further set up to, the laminating of light guide plate outer wall is provided with anti-skidding rubber pad.

Through adopting above-mentioned technical scheme, the setting of antiskid rubber pad can make things convenient for the staff to rotate the regulation to the light guide pipe.

To sum up, the utility model discloses following beneficial effect has:

1. through the arrangement of the light guide tube, the primary reflector and the secondary reflector, the effect of refracting and expanding the input light beam can be achieved, and workers can conveniently and steplessly adjust the diameter of the output light beam;

2. through the arrangement of the guide columns and the four-level vertical plates, the effect that the position of the light guide tube is not easy to shake when the light guide tube is adjusted can be achieved;

3. through the arrangement of the three-stage bearing and the four-stage bearing, the effect of enabling the rotation process of the light guide tube to be smoother can be achieved.

Drawings

Fig. 1 is a schematic diagram of an overall structure of a reflected beam expander in an embodiment.

FIG. 2 is an enlarged view of portion A of FIG. 1 according to an embodiment.

FIG. 3 is a schematic cross-sectional view of an overall beam expander structure of a reflected beam expander in one embodiment.

In the figure, 1, a base; 2. a primary vertical plate; 21. a beam expanding output aperture; 22. a primary reflector; 221. a primary reflecting surface; 23. a connecting rod; 231. a reinforcing section; 3. a secondary vertical plate; 31. a guide post; 4. a third-level vertical plate; 41. a tertiary bearing; 5. a four-level vertical plate; 51. a secondary mirror; 511. a first light-transmitting hole; 512. a second light-transmitting hole; 513. a secondary reflecting surface; 52. mounting holes; 53. a four-stage bearing; 6. a light guide tube; 61. an external thread; 62. a light guide plate; 63. anti-skid rubber pad.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, for the utility model discloses a reflection type beam expander, including rectangular base 1, be provided with one-level riser 2, second grade riser 3 and the tertiary riser 4 of being connected perpendicularly with base 1 on base 1's the bottom surface, one-level riser 2, second grade riser 3 and the mutual parallel arrangement of tertiary riser 4. The second-level vertical plate 3 is connected with a light guide tube 6 in a penetrating way through threads, and the axis of the light guide tube 6 is vertical to the surface of the first-level vertical plate 2. The surface of the light guide tube 6 is provided with an external thread 61, the length of the external thread 61 is the same as the distance from the first-level vertical plate 2 to the second-level vertical plate 3, the light guide tube 6 is arranged by penetrating through the third-level vertical plate 4, a third-level bearing 41 (see fig. 3) is arranged at the joint of the light guide tube 6 and the third-level vertical plate 4, and one end of the light guide tube 6, which is far away from the third-level vertical plate 4, is positioned between the first-level vertical. An expanding light guide plate 62 is formed at an end of the light guide tube 6 away from the primary reflector 22, and in the present embodiment, the light guide plate 62 has a conical surface shape. The outer wall of the light guide plate 62 is provided with an anti-slip rubber pad 63.

Referring to fig. 1, the guide post 31 that a plurality of levels of fixedly connected with set up between one-level riser 2 and the second grade riser 3, guide post 31 use 6 the central axis of light guide tube to be centrosymmetric setting as the symmetry axis, and in this embodiment, guide post 31 is provided with 6 and distributes along vertical direction and has two sets ofly. The guide post 31 is provided with a four-level vertical plate 5 in a sliding sleeve manner, the four-level vertical plate 5 is located between the one-level vertical plate 2 and the two-level vertical plate 3, a mounting hole 52 (see fig. 3) for supporting the light guide tube 6 is formed in the center of the four-level vertical plate 5, one end, away from the light guide plate 62, of the light guide tube 6 is arranged in the four-level vertical plate 5, and a four-level bearing 53 (see fig. 3) is arranged at the joint of the four-level vertical plate 5 and the light.

Referring to fig. 3, the one-level riser 2 is last to have seted up and has expanded beam outlet 21, the central point department of putting of expanding beam outlet 21 is provided with one-level speculum 22, a plurality of connecting rods 23 of fixedly connected with between one-level speculum 22 and the 21 inner wall of expanding beam outlet, connecting rod 23 is provided with 2 to 5, each connecting rod 23 sets up with the circumference evenly distributed of expanding beam outlet 21, each connecting rod 23 extends the setting along the radial direction of expanding beam outlet 21, the width of connecting rod 23 is 1/30 to 1/50 of expanding beam outlet 21 girth. In this embodiment, the number of the connecting rods 23 is 4, and the width of the connecting rod 23 is 1/30 of the circumference of the expanded beam output hole 21. The connecting rod 23 is made of a light-transmitting material, and reinforcing sections 231 (see fig. 2) are formed at both ends of the connecting rod 23, which are connected to the inner wall of the expanded-beam output hole 21 and the primary reflecting mirror 22.

Referring to fig. 3, the first-order reflector 22 is an outward convex conical reflector, the conical top of the first-order reflector 22 is disposed toward the second-order vertical plate 3, the conical bottom of the first-order reflector 22 is fixedly connected with the connecting rods 23, in this embodiment, the connecting rods 23 are connected in a cross shape, the conical bottom of the first-order reflector 22 is formed with a fixing bolt, and the threads of the first-order reflector 22 are fastened at the central position of the whole connecting rods 23. The outer conical surface of the primary reflector 22 is a primary reflecting surface 221.

Referring to fig. 3, the four-level vertical plate 5 is far away from the one side of the two-level vertical plate 3 and is fixedly connected with a second-level reflector 51, the second-level reflector 51 is a concave conical reflector, and in the embodiment, the second-level reflector 51 is arranged in the four-level vertical plate 5. The secondary reflector 51 includes a first light hole 511 and a second light hole 512 having a diameter smaller than that of the first light hole 511, the second light hole 512 is disposed toward the light guide tube 6, the diameter of the second light hole 512 is 1/2 to 1/5 of the diameter of the light guide tube 6, the diameter of the first light hole 511 is 1 to 1.5 times of the diameter of the light guide tube 6, in this embodiment, the diameter of the first light hole 511 is 1.5 times of the diameter of the light guide tube 6, the diameter of the first light hole 511 is the same as that of the beam expansion output hole 21, the diameter of the second light hole 512 is 1/2 of the diameter of the light guide tube 6, the diameter of the second light hole 512 is the same as that of the cone bottom of the primary reflector 22, and the connecting surface between the first light hole 511 and the second light hole 512 is a secondary reflecting surface 513. The central axes of the primary reflector 22, the secondary reflector 51 and the light guide tube 6 are all overlapped, and the conical surface inclination angles of the primary reflector 22 and the secondary reflector 51 are the same.

The implementation principle of the embodiment is as follows: the input light beam is parallel light beam and enters the light guide tube 6 from one end of the light guide tube 6 close to the three-level vertical plate 4, and the light guide plate 62 can guide more light rays into the light guide tube 6, so that the energy of the input light beam is improved. When the input light beam is transmitted to the secondary reflector 51, a circular light spot with the same diameter as the diameter of the second light hole 512 is formed by the shielding of the second light hole 512, the output light beam irradiates the primary reflecting surface 221, the input light beam shielded by the second light hole 512 can be completely reflected to the secondary reflecting surface 513 by the primary reflecting surface 221, and because the primary reflecting surface 221 and the secondary reflecting surface 513 have the same inclination degree, the input light beam reflected by the secondary reflecting surface 513 can form a parallel output light beam according to the light reflection principle and finally is emitted from the beam expanding output hole 21. The output light beam can be shielded by the connecting rod 23 when passing through the connecting rod 23, and can be influenced by the diffuse reflection effect of dust in the air when the output light beam leaves the expanded beam output hole 21 and then is transmitted in the air, and meanwhile, the light itself has volatility, so that under the condition of longer output distance, the light spot formed when the output light beam finally irradiates on the surface of an object is a complete circular light spot, namely, the transmission of the output light beam cannot be substantially influenced by the arrangement of the connecting rod 23, and the shielding effect of the connecting rod 23 on the output light beam is further reduced by the arrangement of the width of the connecting rod 23. Meanwhile, in the embodiment, the connecting rod 23 is made of transparent material, so that the shielding effect of the connecting rod on the output light beam can be more effectively reduced.

When the diameter of the output light beam needs to be adjusted, an operator can realize the adjusting function only by rotating the light guide tube 6. When the light guide tube 6 rotates, the secondary mirror 51 is displaced in a direction away from or close to the primary mirror 22. With the base 1 as a reference system, the position of the primary reflector 22 is fixed, that is, the optical path of the input light beam reflected by the primary reflecting surface 221 does not change, and the change in the position of the secondary reflector 51 affects the size of the optical path of the input light beam from the surface of the primary reflecting surface 221 to the surface of the secondary reflecting surface 513. When the secondary mirror 51 is far away from the primary mirror 22, the optical path increases, resulting in an increase in the diameter of the final output beam; when the secondary mirror 51 is close to the primary mirror 22, the optical path length decreases, resulting in a decrease in the diameter of the final output beam. The diameter of the output light beam can be continuously and steplessly adjusted by simply rotating the light guide tube 6 without additionally replacing or increasing lenses.

The light guide tube 6 can drive the four-level vertical plate 5 to move together when moving, and the moving track of the four-level vertical plate 5 is limited by the guide column 31, so that the displacement direction of the light guide tube 6 is always carried out along the central axes of the first-level reflector 22 and the second-level reflector 51, the deviation and the shaking generated by a light path are effectively reduced, the light spots of output light beams are not easy to deviate, and the energy loss possibly generated by the input light beams in the refraction process is effectively reduced.

In order to improve the comfort of the operator when using the reflective beam expander, an anti-slip rubber pad 63 is disposed on the outer surface of the light guide plate 62 to facilitate the operator to hold the reflective beam expander. The third-stage bearing 41 and the fourth-stage bearing 53 can effectively reduce the resistance force applied to the light guide tube 6 during rotation, so that the rotation and displacement process of the light guide tube 6 is more stable and smooth.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A reflective beam expander comprising a rectangular base (1), characterized in that: the upper surface of the base (1) is provided with a first-level vertical plate (2), a second-level vertical plate (3) and a third-level vertical plate (4) which are vertically connected with the base (1), the second-level vertical plate (3) is connected with a light guide pipe (6) penetrating through the second-level vertical plate (3) in a threaded manner, the outer surface of the light guide pipe (6) is correspondingly provided with an external thread (61), the length of the external thread (61) is the same as the distance between the first-level vertical plate (2) and the second-level vertical plate (3), the light guide pipe (6) is horizontally arranged, one end of the light guide pipe (6) penetrates through the third-level vertical plate (4), one end of the light guide pipe (6) between the first-level vertical plate (2) and the second-level vertical plate (3) is fixedly connected with a second-level reflector (51), the second-level reflector (51) is an inward, the primary reflector (22) is an outward convex conical reflector.

2. A reflective beam expander according to claim 1 and further comprising: the secondary reflector (51) comprises a first light hole (511) and a second light hole (512), the diameter of the second light hole (512) is 1/2-1/5 of the diameter of the light guide tube (6), the diameter of the first light hole (511) is 1-1.5 times of the diameter of the light guide tube (6), a secondary reflecting surface (513) is formed between the first light hole (511) and the second light hole (512), and the second light hole (512) is arranged towards the light guide tube (6).

3. A reflective beam expander according to claim 2 and further comprising: seted up beam expanding output hole (21) on one-level riser (2), the diameter of beam expanding output hole (21) is the same with the diameter of second light trap (512), one-level speculum (22) set up the central point who expands beam output hole (21) and put, a plurality of connecting rods (23) of fixedly connected with between one-level speculum (22) and the beam expanding output hole (21) inner wall, the outer conical surface of one-level speculum (22) is one-level plane of reflection (221), the bottom surface diameter of one-level speculum (22) is the same with the diameter of second light trap (512), the central axis of one-level speculum (22), second grade speculum (51) and light guide pipe (6) all coincides, the conical surface degree of slope of one-level plane of reflection (221) and second grade plane of reflection (513) is the same.

4. A reflective beam expander according to claim 3 and further comprising: the number of the connecting rods (23) is 2-5, the interval angles between every two adjacent connecting rods (23) are the same, the width of each connecting rod (23) is 1/30-1/50 of the perimeter of the expanded beam output hole (21), and the connecting rods (23) are made of light-transmitting materials.

5. A reflective beam expander according to claim 4 and further comprising: reinforcing sections (231) are formed at two ends of the connecting rod (23).

6. A reflective beam expander according to claim 3 and further comprising: be equipped with guide post (31) that a plurality of levels set up between one-level riser (2) and second grade riser (3), guide post (31) are central symmetry setting for the line of symmetry with light guide pipe (6) the central axis, sliding connection has level four riser (5) on guide post (31), level four riser (5) are located between one-level riser (2) and second grade riser (3), level four riser (5) central point puts and offers mounting hole (52) that are used for supporting light guide pipe (6), second grade speculum (51) fixed connection is in the one side that level four riser (5) are close to one-level riser (2).

7. A reflective beam expander according to claim 6 and further comprising: the junction of level four riser (5) and light guide pipe (6) is provided with level four bearing (53), the junction of level three riser (4) and light guide pipe (6) is provided with tertiary bearing (41).

8. A reflective beam expander according to claim 7 and further comprising: an expansion type light guide plate (62) is formed at one end of the light guide pipe (6) far away from the secondary reflector (51).

9. A reflective beam expander according to claim 8 and further comprising: and an anti-skid rubber pad (63) is attached to the outer wall of the light guide plate (62).