CN218213586U

CN218213586U - Beam expanding device for optical platform

Info

Publication number: CN218213586U
Application number: CN202222433115.2U
Authority: CN
Inventors: 袁超; 孟弼伟; 毛亚莉
Original assignee: Wuhan University WHU
Current assignee: Wuhan University WHU
Priority date: 2022-09-13
Filing date: 2022-09-13
Publication date: 2023-01-03
Anticipated expiration: 2032-09-13

Abstract

The utility model belongs to the technical field of optics, a beam expanding device for optical platform is disclosed, include the convex lens and the plano-convex lens that set gradually along the light path, convex lens installs on the removal mesa of displacement platform through the first adjusting part with adjustable height, and the base of displacement platform is fixed on optical platform, and plano-convex lens installs on optical platform through the second adjusting part with adjustable height. The utility model discloses can simplify the device structure under the condition that guarantees to expand the beam device and possess regulatory function, simplify the regulation operation, reduce the processing cost.

Description

Beam expanding device for optical platform

Technical Field

The utility model belongs to the technical field of optics, more specifically relates to a beam expanding device for optical platform.

Background

It is often desirable to use a beam expander, which is a lens assembly that can vary the beam diameter and divergence angle, in an optical system. For example, in the field of laser processing, a laser beam needs to be adjusted by a beam expander to change the divergence angle of the laser beam, the laser beam is adjusted to be a collimated beam, and then a focusing lens is used to obtain a high-power-density light spot; in the fields of laser guidance, distance measurement and the like, in order to improve the collimation of laser, the laser needs to be expanded to obtain an ideal long-distance measurement effect. In addition, in the laser test system, the diameter of a laser spot also needs to be adjusted by arranging a beam expander so as to realize different test functions.

The prior art, for example, patent CN210573032U discloses a 355nm beam expander, which solves the problems that the existing 355nm beam expander is generally composed of two or more glass lenses, and the production difficulty and the production cost of directly processing glass are high. Although the laser beam expander has a simple structure, the laser beam expander is lack of flexibility, and the laser beam expander cannot expand the laser with other wavelengths, so that the application scene is limited. Patent CN1614461A discloses a universal beam expanding system for light beams, in which a lens frame for fixing a lens is separated from an adjusting component, and the beam expanding with different magnifications is realized by replacing different lenses, but such a beam expanding lens needs to be replaced when the beam expanding is performed in a variable-magnification manner, which is complicated in operation. Patent CN 112230425A discloses a semiconductor laser beam expander adjusting device, which includes a placing box, two moving blocks, and two driving devices for driving the two moving blocks to move back and forth in the placing box, wherein the two moving blocks are used for fixing a concave lens or a convex lens respectively; the device comprises a swinging device and an adjusting device arranged on the swinging device, wherein the swinging device is detachably arranged at a laser light outlet and is used for adjusting the coincidence of a laser light outlet optical axis and a central axis of a beam expanding lens; the fixing device is arranged on the supporting piece and used for fixing the rotated iron balls. This patent has been solved and has been expanded beam lens snap-on in the past and has been located in laser light-emitting port department, need adjust a plurality of jackscrew on expanded beam mirror holder, and it is big to adjust the degree of difficulty, can not adjust the problem of distance between concave lens and the convex lens in the expanded beam mirror simultaneously, but above-mentioned technical scheme device is complicated, complex operation, and the processing cost is higher.

In view of the above technical problems, it is necessary to design a beam expanding device for an optical platform, which simplifies the structure of the device, simplifies the adjustment operation, and reduces the processing cost under the condition that the beam expanding device has the adjustment function.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a beam expanding device for optical platform solves among the prior art and expands the beam device and install the more complicated, adjust the more loaded down with trivial details problem of operation of device structure under the condition that possesses regulatory function.

The utility model provides a beam expanding device for optical platform, include: the convex lens and the plano-convex lens are arranged along the light path in sequence; the convex lens is arranged on a moving table top of the displacement table through a first adjusting assembly with adjustable height, and a base of the displacement table is fixed on the optical platform; the plano-convex lens is mounted on the optical platform by a second height-adjustable adjustment assembly.

Preferably, the first adjusting assembly comprises a first mirror frame and a convex lens connecting rod; the convex lens is arranged on the first mirror bracket, the first mirror bracket is connected with one end of the convex lens connecting rod, and the other end of the convex lens connecting rod is fixed on an installation hole of the moving table top of the displacement table; the second adjusting assembly comprises a second mirror frame and a plano-convex lens connecting rod; the plano-convex lens is installed on the second mirror bracket, the second mirror bracket is connected with one end of the plano-convex lens connecting rod, and the other end of the plano-convex lens connecting rod is fixed on the mounting hole of the optical platform.

Preferably, a first screw for locking the convex lens is arranged on the convex lens connecting rod, and a second screw for locking the plano-convex lens is arranged on the plano-convex lens connecting rod.

Preferably, the convex lens connecting rod and the planoconvex lens connecting rod have the same structure and respectively comprise a supporting rod, a moving rod and an adjusting knob; the movable rod is connected inside the supporting rod in a sliding mode, and the adjusting knob is used for adjusting and fixing the height of the movable rod.

Preferably, the convex lens and the plano-convex lens are coaxially arranged, and the displacement table is used for advancing or retreating along the axis direction.

Preferably, the displacement table is a two-dimensional displacement table, and the displacement table is used for displacement adjustment along an X axis and a Y axis.

Preferably, the beam expanding device for an optical bench further comprises: a laser arranged in front of the convex lens; the laser beam emitted by the laser is positioned on the same central axis with the centers of the convex lens and the plano-convex lens.

Preferably, the laser is mounted on the optical platform through a laser connecting rod, and the laser connecting rod is a connecting rod with adjustable height.

Preferably, the beam expanding device for an optical bench further comprises: the light display plate is arranged behind the plano-convex lens; the light display plate is installed on the optical platform through a light display plate connecting rod, and the light display plate connecting rod is a connecting rod with adjustable height.

The utility model discloses in the one or more technical scheme that provides, following technological effect or advantage have at least:

the utility model provides a beam expanding device for optical platform includes the convex lens and the plano-convex lens that set gradually along the light path, and convex lens installs on the removal mesa of displacement platform through the first adjusting part with adjustable height, and the base of displacement platform is fixed on optical platform, and plano-convex lens installs on optical platform through the second adjusting part with adjustable height. The utility model discloses a two adjusting part can convenient and fast ground adjust convex lens and plano-convex lens's height, combine the displacement platform to adjust, can convenient and fast ground adjust the relative distance between two lenses to ensure that the center of two lenses is in same center pin, and then can realize the expansion or the shrink of facula, reach and expand the beam purpose. The device provided by the utility model have simple structure, simple operation, advantage such as with low costs under the condition that possesses regulatory function.

Drawings

Fig. 1 is a schematic structural diagram of a beam expanding device for an optical platform according to an embodiment of the present invention.

Wherein, the laser comprises 1-a laser, 2-a convex lens, 3-a plano-convex lens, 4-a light display plate, 5-a light display plate connecting rod, 6-a plano-convex lens connecting rod, 7-a convex lens connecting rod, 8-a displacement table, 9-an optical platform and 10-a laser connecting rod.

Detailed Description

In order to better understand the technical scheme, the technical scheme is described in detail in the following with reference to the attached drawings of the specification and specific embodiments.

The present embodiment provides a beam expanding device for an optical platform, as shown in fig. 1, which mainly includes: a convex lens 2 and a plano-convex lens 3 arranged in sequence along the light path; the convex lens 2 is arranged on a moving table surface of a displacement table 8 through a first adjusting component with adjustable height, and a base of the displacement table 8 is fixed on an optical platform 9; the plano-convex lens 3 is mounted on the optical platform 9 by a second height adjustable adjustment assembly.

Wherein the first adjusting assembly comprises a first lens frame and a convex lens connecting rod 7; the convex lens 2 is arranged on the first mirror frame, the first mirror frame is connected with one end of the convex lens connecting rod 7, and the other end of the convex lens connecting rod 7 is fixed on an installation hole of a movable table top of the displacement table 8; the second adjusting assembly comprises a second mirror frame and a plano-convex lens connecting rod 6; the plano-convex lens 3 is installed on the second mirror bracket, the second mirror bracket is connected with one end of the plano-convex lens connecting rod 6, and the other end of the plano-convex lens connecting rod 6 is fixed on an installation hole of the optical platform 9.

In a preferred scheme, a first screw for locking the convex lens 2 is arranged on the convex lens connecting rod 7, and a second screw for locking the plano-convex lens 3 is arranged on the plano-convex lens connecting rod 6. Promptly convex lens 2 when plano-convex lens 3 reaches predetermined coaxial position, can lock two lens respectively through the screw on the connecting rod, can avoid adjusting during displacement platform 8 convex lens 2 takes place to rock, guarantees the axiality requirement.

Specific structural examples of the connecting rod are given below. The convex lens connecting rod 7 and the plano-convex lens connecting rod 6 have the same structure and respectively comprise a supporting rod, a moving rod and an adjusting knob; the movable rod is connected inside the supporting rod in a sliding mode, and the adjusting knob is used for adjusting and fixing the height of the movable rod.

When the convex lens 2 and the planoconvex lens 3 are fixed on the optical platform 9, the two lenses can be arranged on the same horizontal axis, the displacement table 8 is used for advancing or retreating along the axis direction, and the convex lens 2 can coaxially move along with the displacement table 8. Convex lens connecting rod 7 the center of plano-convex lens connecting rod 6 all is concentric with the mounting hole center, convex lens connecting rod 7 plano-convex lens connecting rod 6 all has the controllability of high accuracy, convex lens 2 and 3 accessible high accuracy connecting rods height-adjusting of plano-convex lens make the center of the two be in same center pin.

Or, the displacement table 8 is a two-dimensional displacement table, and the displacement table 8 is used for displacement adjustment along the X axis and the Y axis. The displacement table 8 is adjusted to displace, and the height is adjusted by combining a high-precision connecting rod, so that the centers of the convex lens 2 and the plano-convex lens 3 are positioned on the same central axis.

The convex lens 2 and the planoconvex lens 3 can be freely matched, and different specifications including diameter, thickness, focal length and the like can be selected, so that the selection of different incident wavelength light beams can be met.

Will the utility model provides a when the device is applied to the relevant field of laser, the utility model provides a beam expanding device is as adjusting the important component part of light beam facula size. Specifically, the beam expanding device for an optical platform further comprises: the laser device 1 is arranged in front of the convex lens 2, and the light display plate 4 is arranged behind the plano-convex lens 3. The curved surfaces of the convex lens 2 and the plano-convex lens 3 are bent towards the incident direction of the laser beam, the convex lens 2 is in front, and the plano-convex lens 3 is behind to form a Keplerian telescope structure. The laser beam emitted by the laser 1, the centers of the convex lens 2 and the plano-convex lens 3 are positioned on the same central axis, and the coaxiality requirement is met. The laser 1 is installed on the optical platform 9 through a laser connecting rod 10, and the laser connecting rod 10 is a connecting rod with adjustable height. The light display plate 4 is installed on the optical platform 9 through a light display plate connecting rod 5, and the light display plate connecting rod 5 is a connecting rod with adjustable height.

The incident light beams are converged at the focal point through the convex lens 2 and then amplified; through rotating the knob of the displacement table 8, the displacement table 8 is controlled to move, so that the relative distance between the focus of the convex lens 2 and the plano-convex lens 3 is changed, the light beam is amplified or reduced after passing through the plano-convex lens 3, and therefore the continuous change of the size of the light spot can be realized at the fixed position behind the plano-convex lens 3.

Referring to fig. 1, L1 is a focal length of the convex lens 2, L2 is a focal length of the plano-convex lens 3, when the focal points of the convex lens 2 and the plano-convex lens 3 are coincident, emergent light passing through the plano-convex lens 3 is collimated parallel light to obtain a light spot S2, and when the displacement table 8 is adjusted to advance for a certain distance, the emergent light spot passing through the plano-convex lens 3 becomes larger to obtain the light spot S1.

To sum up, the utility model provides a device assembly process is simple, uses the simple operation, and is with low costs, and it is effectual to expand the beam, and job stabilization nature is high, and the practicality is strong.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the examples, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.

Claims

1. A beam expanding device for an optical platform, comprising: the convex lens and the plano-convex lens are arranged along the light path in sequence; the convex lens is arranged on a moving table top of the displacement table through a first adjusting assembly with adjustable height, and a base of the displacement table is fixed on the optical platform; the plano-convex lens is mounted on the optical platform by a second height-adjustable adjustment assembly.

2. The beam expanding apparatus for an optical platform of claim 1, wherein the first adjustment assembly comprises a first mirror frame and a convex lens connecting rod; the convex lens is arranged on the first mirror frame, the first mirror frame is connected with one end of the convex lens connecting rod, and the other end of the convex lens connecting rod is fixed on an installation hole of a moving table top of the displacement table; the second adjusting assembly comprises a second mirror frame and a plano-convex lens connecting rod; the plano-convex lens is installed on the second mirror bracket, the second mirror bracket is connected with one end of the plano-convex lens connecting rod, and the other end of the plano-convex lens connecting rod is fixed on the mounting hole of the optical platform.

3. The beam expanding apparatus for an optical bench of claim 2, wherein the convex lens connecting rod is provided with a first screw for locking the convex lens, and the plano-convex lens connecting rod is provided with a second screw for locking the plano-convex lens.

4. The beam expanding apparatus for an optical bench of claim 2, wherein the convex lens connecting rod and the plano-convex lens connecting rod are identical in structure and each comprises a support rod, a moving rod and an adjusting knob; the movable rod is connected inside the supporting rod in a sliding mode, and the adjusting knob is used for adjusting and fixing the height of the movable rod.

5. The beam expanding device for an optical bench of claim 1, wherein the convex lens and the plano-convex lens are coaxially disposed, and the displacement stage is configured to advance or retreat in an axial direction.

6. The beam expanding device for an optical bench of claim 1, wherein the displacement stage is a two-dimensional displacement stage for displacement adjustment along X-axis and Y-axis.

7. The beam expanding device for an optical platform of claim 1, further comprising: a laser arranged in front of the convex lens; the laser beam emitted by the laser is positioned on the same central axis with the centers of the convex lens and the plano-convex lens.

8. The beam expanding device for an optical bench of claim 7, wherein the laser is mounted on the optical bench by a laser connection rod, the laser connection rod being a height adjustable connection rod.

9. The beam expanding device for an optical bench of claim 1, further comprising: the light display plate is arranged behind the plano-convex lens; the light display plate is installed on the optical platform through a light display plate connecting rod, and the light display plate connecting rod is a connecting rod with adjustable height.