CN219997391U - High-convergence-rate flat Fresnel lens for laser - Google Patents

Abstract

The utility model discloses a high-convergence-rate flat plate Fresnel lens for a laser, which belongs to the technical field of laser optics and comprises a lens barrel, wherein a pair of arc-shaped sliding grooves are formed in the outer end of the lens barrel, a shading component is arranged at one end of the lens barrel, a first fixing ring, a rotating ring and a second fixing ring are respectively sleeved on the outer surface of the lens barrel, a fixing component is arranged on the rotating ring, the Fresnel lens is fixedly connected to the inner wall of the lens barrel, the lens barrel can be rotationally translated along the track of the arc-shaped sliding grooves through rotating the rotating ring, fine focal length adjustment can be realized through rotating the rotating ring, focal points can be finely adjusted in a smaller range, time and energy can be saved, and then the lens barrel can be fixed through the fixing blocks in the fixing component and can be abutted to the arc-shaped sliding grooves, so that the lens barrel can be prevented from displacement through the fixing component.

Description

High-convergence-rate flat Fresnel lens for laser

Technical Field

The utility model relates to the technical field of laser optics, in particular to a high-convergence-rate flat Fresnel lens for a laser.

Background

Thus, a fresnel lens is a special lens consisting of a series of circular saw-tooth shaped lens rings that are in contact with each other, all centered at a common point. Unlike conventional lenses, the surface of a fresnel lens is not a smooth curved surface, but is formed of a series of flat surfaces, so that light is focused on one point, and it is thinner and lighter than conventional lenses, and is widely used in many optical devices.

Chinese patent grant bulletin number: CN211928280U provides a fresnel lens adjusting device for laser, this scheme can carry out gross movement along left and right directions when carrying out rotary motion along the internal thread under the stress condition through the screw thread section of thick bamboo, make fresnel lens's position change, reach focus adjustment's effect from this, because laser belongs to the precision instrument, the adjustment precision requirement to the focus is higher, but this scheme is through translation lens adjustment focus, this kind of mode adjustment focus can cause the operation not convenient enough, simultaneously because the range of hand motion is great during the adjustment can lead to the precision of adjustment not enough, especially under the circumstances that need frequent adjustment focus, can cause energy and time waste, inconvenient use.

Accordingly, a high convergence flat fresnel lens for a laser is proposed in view of the above-described problems.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems existing in the prior art, the utility model aims to provide a high-convergence-rate flat Fresnel lens for a laser, which can enable a lens barrel to rotationally translate along the track of an arc chute by rotating a rotating ring, can realize fine focal length adjustment by rotating and adjusting focal length, fine-adjusts focal points in a smaller range, is convenient for staff to use, and can save time and energy.

2. Technical proposal

In order to solve the problems, the utility model adopts the following technical scheme.

The utility model provides a dull and stereotyped fresnel lens of high convergence rate for laser instrument, includes the lens cone, a pair of arc spout has been seted up to the lens cone outer end, shading subassembly is installed to lens cone one end, and lens cone surface cover is equipped with first solid fixed ring, swivel ring and second solid fixed ring respectively, install solid fixed subassembly on the swivel ring, lens cone inner wall fixedly connected with fresnel lens.

Further, the lug is fixedly connected with one end of the rotating ring and one end of the second fixed ring, grooves matched with the lug are formed in one end of the first fixed ring and one end of the rotating ring, the rotating ring is rotationally connected with the grooves on the first fixed ring through the lug, and the second fixed ring is rotationally connected with the grooves on the rotating ring through the lug.

Further, the shading component comprises a shading cover, a limiting groove is formed in the outer end of the first fixing ring, and the shading cover is rotationally connected with the inner wall of the limiting groove.

Further, a magnetic block is arranged on the light shield, and a magnet matched with the magnetic block is arranged on the first fixing ring.

Further, the fixed assembly comprises a movable block, a through hole is formed in the outer end of the rotary ring, and the movable block is slidably connected with the inner wall of the through hole.

Further, the fixed subassembly still includes the butt piece, butt piece bottom fixedly connected with slider, slider and through-hole inner wall sliding connection.

Further, slider bottom fixedly connected with fixed block, the outer cover of fixed block is equipped with telescopic spring, telescopic spring and slider bottom fixed connection.

Further, fixed block bottom fixedly connected with rubber pad, rubber pad bottom and arc spout looks butt.

3. Advantageous effects

Compared with the prior art, the utility model has the advantages that:

(1) According to the scheme, the lens barrel can be rotationally translated along the track of the arc chute through the rotary ring, fine focus adjustment can be achieved through rotationally adjusting the focus, the focus is finely adjusted in a smaller range, the use of workers is facilitated, and meanwhile time and energy can be saved.

(2) According to the scheme, the fixing blocks in the fixing assembly can be abutted against the arc-shaped sliding grooves, so that the lens barrel can be fixed, when the focal length is adjusted, the lens barrel can be prevented from being displaced through the fixing assembly, the accuracy is improved, and the error is reduced.

Drawings

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a schematic side cross-sectional view of the present utility model;

FIG. 3 is a schematic view of the structure of FIG. 2A according to the present utility model;

fig. 4 is a schematic diagram of the structure of fig. 2B according to the present utility model.

The reference numerals in the figures illustrate:

1. a lens barrel; 2. a first fixing ring; 3. a rotating ring; 4. a second fixing ring; 5. a shade assembly; 501. a light shield; 502. a magnetic block; 503. a magnet; 6. a fixing assembly; 601. a movable block; 602. an abutment block; 603. a slide block; 604. a telescopic spring; 605. a fixed block; 606. a rubber pad; 7. an arc chute; 8. a limit groove; 9. a Fresnel lens; 10. and a bump.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model; it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present utility model are within the protection scope of the present utility model.

In the description of the present utility model, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Examples:

referring to fig. 1-2, a flat fresnel lens with high convergence rate for a laser comprises a lens barrel 1, a pair of arc-shaped sliding grooves 7 are formed in the outer end of the lens barrel 1, a shading component 5 is installed at one end of the lens barrel 1, a first fixing ring 2, a rotating ring 3 and a second fixing ring 4 are respectively sleeved on the outer surface of the lens barrel 1, a fixing component 6 is installed on the rotating ring 3, and a fresnel lens 9 is fixedly connected to the inner wall of the lens barrel 1.

The rotary ring 3 and the second fixed ring 4 are fixedly connected with a lug 10, the first fixed ring 2 and the rotary ring 3 are provided with grooves matched with the lug 10, the rotary ring 3 is rotationally connected with the grooves on the first fixed ring 2 through the lug 10, and the second fixed ring 4 is rotationally connected with the grooves on the rotary ring 3 through the lug 10.

According to the scheme, due to the mutually matched convex blocks 10 and grooves on the first fixed ring 2, the rotating ring 3 and the second fixed ring 4, the first fixed ring 2, the rotating ring 3 and the second fixed ring 4 can be mutually connected in a rotating mode to form a long cylinder, so that the lens cylinder 1 can be installed inside the lens cylinder, then the second fixed ring 4 is installed at the output end of a laser, the Fresnel lens 9 inside the lens cylinder 1 needs to be kept on the same axis with the output end of the laser, laser can be focused through the Fresnel lens 9, then the arc-shaped chute 7 is in a spiral shape, when the rotating ring 3 is rotated, the fixed block 605 on the fixed component 6 can slide in the arc-shaped chute 7, and the fixed block 605 is fixed, so that the lens cylinder 1 can rotate and shift, the distance between the lens cylinder 1 and the output end of the laser is changed, and the purpose of adjusting the focal length is achieved.

Referring to fig. 1-2 and fig. 4, the light shielding assembly 5 includes a light shielding cover 501, a limiting groove 8 is formed at an outer end of the first fixing ring 2, and the light shielding cover 501 is rotatably connected with an inner wall of the limiting groove 8.

The light shield 501 is provided with a magnetic block 502, and the first fixing ring 2 is provided with a magnet 503 matched with the magnetic block 502.

The spacing groove 8 in this scheme comprises straight flute and arc groove, simultaneously because the looks adaptation of spacing groove 8 and lens hood 501, consequently lens hood 501 just can rotate through inserting behind the spacing groove 8, makes magnetic block 502 and magnet 503 pass through the magnetism and be connected, makes lens hood 501 fixed, and when the device does not use, lens hood 501 just can prevent that the laser instrument from shining the object on every side owing to unexpected opening, also can prevent that the dust from getting into simultaneously.

Referring to fig. 1-3, the fixed assembly 6 includes a movable block 601, a through hole is formed at the outer end of the rotating ring 3, and the movable block 601 is slidably connected to the inner wall of the through hole.

The fixed assembly 6 further comprises an abutting block 602, a sliding block 603 is fixedly connected to the bottom end of the abutting block 602, and the sliding block 603 is slidably connected with the inner wall of the through hole.

The slider 603 bottom fixedly connected with fixed block 605, fixed block 605 outer periphery cover is equipped with extension spring 604, extension spring 604 and slider 603 bottom fixed connection.

The bottom end of the fixed block 605 is fixedly connected with a rubber pad 606, and the bottom end of the rubber pad 606 is abutted against the arc chute 7.

When the movable block 601 is not pushed by the acting force of the telescopic spring 604, the fixed block 605 moves downwards, after the focal length is adjusted, the adjusted distance is required to be locked, the movable block 601 is enabled to press the abutting block 602 by moving the movable block 601, due to the fact that the chamfer angles of the movable block 601 and the abutting block 602 are matched with each other, the abutting block 602 is enabled to move downwards when the movable block 601 presses the abutting block 602, the sliding block 603 and the fixed block 605 can move downwards through the movement of the abutting block 602, at the moment, a rubber pad 606 at the bottom end of the fixed block 605 abuts against the bottom of the arc-shaped chute 7, and the lens barrel 1 can be fixed through the high friction force of the rubber pad 606, so that accuracy is prevented from being affected by movement.

Working principle: the device needs to be installed at the output end of the laser and matched with the device to play a role, when the distance between the Fresnel lens 9 and the laser, namely the focal length, needs to be adjusted, the fixed block 605 on the fixed component 6 can slide in the arc-shaped chute 7 through the rotating ring 3, the lens barrel 1 can rotate and displace due to the fixed block 605 being fixed, the distance between the lens barrel 1 and the output end of the laser is changed, after the focal length is adjusted, the movable block 601 is moved to press the abutting block 602 to enable the abutting block 602 to move downwards, at the moment, the rubber pad 606 at the bottom end of the fixed block 605 is abutted with the bottom of the arc-shaped chute 7, the lens barrel 1 can be fixed through the high friction force of the rubber pad 606, and when the lens hood 501 is not used, the lens hood 501 can be rotated after being inserted into the limiting groove 8, and the lens hood 501 is fixed in front of the Fresnel lens 9.

The above description is only of the preferred embodiments of the present utility model; the scope of the utility model is not limited in this respect. Any person skilled in the art, within the technical scope of the present disclosure, may apply to the present utility model, and the technical solution and the improvement thereof are all covered by the protection scope of the present utility model.

Claims (8)

1. A high convergence flat fresnel lens for lasers comprising a lens barrel (1), characterized in that: a pair of arc spout (7) have been seted up to lens section of thick bamboo (1) outer end, shading subassembly (5) are installed to lens section of thick bamboo (1) one end, and lens section of thick bamboo (1) surface cover is equipped with first solid fixed ring (2), rotatory ring (3) and second solid fixed ring (4) respectively, install solid fixed component (6) on rotatory ring (3), lens section of thick bamboo (1) inner wall fixedly connected with fresnel lens (9).

2. A high convergence rate flat fresnel lens for a laser as set forth in claim 1, wherein: the rotary ring (3) and the second fixed ring (4) are fixedly connected with a lug (10), grooves matched with the lug (10) are formed in one ends of the first fixed ring (2) and the rotary ring (3), the rotary ring (3) is rotationally connected with the grooves on the first fixed ring (2) through the lug (10), and the second fixed ring (4) is rotationally connected with the grooves on the rotary ring (3) through the lug (10).

3. A high convergence rate flat fresnel lens for a laser as set forth in claim 1, wherein: the shading component (5) comprises a shading cover (501), a limiting groove (8) is formed in the outer end of the first fixing ring (2), and the shading cover (501) is rotationally connected with the inner wall of the limiting groove (8).

4. A high convergence rate flat fresnel lens for a laser as set forth in claim 3, wherein: the shading cover (501) is provided with a magnetic block (502), and the first fixing ring (2) is provided with a magnet (503) matched with the magnetic block (502).

5. A high convergence rate flat fresnel lens for a laser as set forth in claim 1, wherein: the fixed assembly (6) comprises a movable block (601), a through hole is formed in the outer end of the rotary ring (3), and the movable block (601) is slidably connected with the inner wall of the through hole.

6. A high convergence rate flat fresnel lens for a laser as set forth in claim 1, wherein: the fixing assembly (6) further comprises an abutting block (602), a sliding block (603) is fixedly connected to the bottom end of the abutting block (602), and the sliding block (603) is slidably connected with the inner wall of the through hole.

7. A high-convergence flat fresnel lens for a laser as set forth in claim 6, wherein: the sliding block is characterized in that a fixed block (605) is fixedly connected to the bottom end of the sliding block (603), a telescopic spring (604) is sleeved outside the fixed block (605), and the telescopic spring (604) is fixedly connected with the bottom end of the sliding block (603).

8. A high-convergence flat fresnel lens for a laser as set forth in claim 7, wherein: the bottom end of the fixed block (605) is fixedly connected with a rubber pad (606), and the bottom end of the rubber pad (606) is abutted with the arc chute (7).