Adjustable beam attenuator

Abstract

The utility model provides an adjustable beam attenuator, which comprises a shell, two wedge-shaped mirror bodies and an adjusting mechanism, the two wedge-shaped mirror bodies are arranged in the shell and are arranged along the front-back direction of the shell, the wedge-shaped mirror bodies have gradually changing thickness changes in the left-right direction of the shell, and the thickness change directions of the two wedge-shaped mirror bodies are opposite; the adjusting mechanism comprises a two-way screw rotationally arranged in the shell, the two-way screw is arranged in the left-right direction of the shell, two threaded sections opposite in spiral direction are arranged on the two-way screw, mirror brackets are connected to the two threaded sections through lead screws respectively, and the two wedge-shaped mirror bodies are installed on the two mirror brackets respectively. According to the adjustable beam attenuator, through superposition attenuation of the two wedge-shaped mirror bodies, gradual change of the attenuation rate can be realized, and meanwhile, the variation range of the attenuation rate can be increased; the two wedge-shaped mirror bodies are controlled to move at the same time through the adjusting mechanism, and the two wedge-shaped mirror bodies are driven by the two-way screw rod to be close to or away from each other, so that the operation of adjusting the attenuation rate is simpler and more convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical system technical field especially relates to an adjustable light beam attenuator. BACKGROUND

[0002] In part optical test system, sometimes need to attenuate laser beam, make laser beam attenuate below the damage threshold of optical element (such as the sensor of digital camera), to avoid optical element damage, current most practice is to set one or more attenuation lens on the light path of laser beam, the attenuation multiple of multiple attenuation lens is multiplied to be the final attenuation rate, when needing to change attenuation rate, through switching or replacing attenuation lens, thereby adjusting attenuation rate, in above-mentioned practice, attenuation rate is from one value jump change into another value, cannot realize the gradual change adjustment of attenuation rate, and to realize the gradual change adjustment of attenuation rate, prior art will adopt wedge mirror body, wedge mirror body has gradually varying thickness, by moving wedge mirror body, make light beam pass through the position of different thickness on wedge mirror body, thereby realize different attenuation rate adjustment, but the thickness variation range of a wedge mirror body is relatively small, and the attenuation rate variation range is small, is not favorable to application, and if multiple wedge mirror bodies are stacked, then need to adjust the position of each wedge mirror body, inconvenient to operate. SUMMARY

[0003] Therefore, the utility model provides a kind of adjustable light beam attenuator, to realize attenuation rate gradual change adjustment while making operation convenient and fast.

[0004] The technical scheme of the utility model is realized as follows:

[0005] A kind of adjustable light beam attenuator, comprising:

[0006] Shell, the cavity is equipped in the shell, the light hole is equipped in the front and back of the shell, and the light hole is communicated with the cavity;

[0007] Two wedge mirror bodies, two wedge mirror bodies are arranged in the cavity and are arranged along the front and back direction of the shell, the wedge mirror body has gradually varying thickness in the left and right direction of the shell, and the thickness variation direction of two wedge mirror bodies is opposite;

[0008] Adjusting mechanism, the bidirectional screw rod is rotationally arranged in the cavity, the bidirectional screw rod is arranged along the left and right direction of the shell, two thread segments with opposite screw directions are equipped on the bidirectional screw rod, and mirror frame is connected to the two thread segments by screw respectively, and two wedge mirror bodies are mounted on two mirror frames respectively.

[0009] As a further optional solution, the adjusting mechanism further comprises a mounting base arranged in the cavity, and the mounting base is provided with a receiving groove for receiving the bidirectional screw rod, and a strip-shaped notch is formed at the top of the mounting base, the frame is threadedly connected with the bidirectional screw rod, and the frame is slidably connected with the strip-shaped notch.

[0010] As a further optional solution, one end of the bidirectional screw rod extends out of the shell, and a hand screw head is connected with the part of the bidirectional screw rod extending out of the shell.

[0011] As a further optional solution, the top of the shell is provided with an observation slot, and a sliding block is arranged on one frame and slidably arranged in the observation slot.

[0012] As a further optional solution, the shell is provided with a through hole for allowing a cage rod to pass through, and the through hole penetrates through the front-to-back direction of the shell.

[0013] As a further optional solution, the shell is provided with a clamping mechanism, the clamping mechanism comprises a C-shaped clamping body arranged at one end of the through hole, the two ends of the C-shaped clamping body are respectively connected with a first clamping plate and a second clamping plate, the first clamping plate and the part of the C-shaped clamping body corresponding to the first clamping plate are fixedly connected to the outer wall of the shell, and the second clamping plate and the part of the C-shaped clamping body corresponding to the second clamping plate are spaced apart from the outer wall of the shell; a locking screw is arranged between the first clamping plate and the second clamping plate, and the locking screw is threadedly connected with the first clamping plate or the second clamping plate.

[0014] The adjustable light beam attenuator of the present application has at least the following beneficial effects relative to the prior art:

[0015] The adjustable light beam attenuator attenuates by superimposing two wedge-shaped mirrors, which can gradually change the attenuation rate and increase the change range of the attenuation rate, and the adjusting mechanism simultaneously controls the movement of the two wedge-shaped mirrors, the bidirectional screw rod drives the two wedge-shaped mirrors to move closer to or farther away from each other, so that the operation of adjusting the attenuation rate is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 It is a structural schematic view of the adjustable light beam attenuator of the present application.

[0018] Figure 2 It is an explosion schematic view of the adjustable light beam attenuator of the utility model;

[0019] Figure 3 It is an explosion schematic view of the adjusting mechanism;

[0020] Figure 4 It is a structural schematic view of the clamping mechanism.

[0021] In the drawing: 1, shell; 11, cavity; 12, light hole; 13, observation groove; 14, connecting hole;

[0022] 2, wedge-shaped mirror body;

[0023] 3, adjusting mechanism; 31, bidirectional screw rod; 311, hand screw head; 32, mounting seat; 321, containing groove; 322, strip-shaped notch; 33, mirror frame; 331, sliding block;

[0024] 4, clamping mechanism; 41, C-shaped clamping body; 42, first clamping plate; 43, second clamping plate; 44, gap; 45, locking screw. DETAILED DESCRIPTION

[0025] The technical scheme in the embodiments of the utility model will be described clearly and completely below, obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the scope of protection of the utility model.

[0026] In the description of the utility model, it is understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawing, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model.

[0027] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication inside two elements or the interaction relationship of two elements. For the person skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0028] Reference Figures 1-4 The utility model discloses an embodiment shows a kind of adjustable light beam attenuator, including shell 1, two wedge-shaped mirror bodies 2 and adjusting mechanism 3;

[0029] The shell 1 is equipped with cavity 11, and the shell 1 is equipped with front and rear through light hole 12, and the light hole 12 is communicated with the cavity 11;The light hole 12 is used for light beam to pass through;

[0030] Two wedge-shaped mirror bodies 2 are arranged in the cavity 11 and are arranged along the front and rear direction of the shell 1, when light beam passes through the light hole 12, light beam will pass through two wedge-shaped mirror bodies 2 in turn, so that light beam attenuates;The wedge-shaped mirror body 2 has the thickness variation of gradual change in the left and right directions of the shell 1, and the thickness variation direction of two wedge-shaped mirror bodies 2 is opposite;Specifically, as shown in Figure 1 And Figure 2 From left to right direction, the thickness variation of one wedge-shaped mirror body 2 is from thin to thick, and the thickness variation of another wedge-shaped mirror body 2 is from thick to thin;

[0031] The adjusting mechanism 3 includes bidirectional screw rod 31 rotationally arranged in the cavity 11, and the bidirectional screw rod 31 is arranged along the left and right directions of the shell 1, and the bidirectional screw rod 31 is equipped with two thread segments with opposite screw directions, and the two thread segments are respectively connected with mirror holder 33 by screw, and two wedge-shaped mirror bodies 2 are respectively mounted on two mirror holders 33.Wherein, when the bidirectional screw rod 31 is rotated, two mirror holders 33 can be made to approach each other or move away from each other along the length direction of the bidirectional screw rod 31, that is, two wedge-shaped mirror bodies 2 approach each other or move away from each other, so that the thickness of light beam passing through two wedge-shaped mirror bodies 2 changes, and in the embodiment, only the bidirectional screw rod 31 can be rotated, and the position adjustment of two wedge-shaped mirror bodies 2 can be realized;

[0032] In this way, the adjustable light beam attenuator attenuates by two wedge-shaped mirror bodies 2, which can realize the gradual change of attenuation rate on the one hand, and can increase the change range of attenuation rate on the other hand;In addition, two wedge-shaped mirror bodies 2 are simultaneously controlled to move by adjusting mechanism 3, and two wedge-shaped mirror bodies 2 are made to approach each other or move away from each other by bidirectional screw rod 31, so that the operation when adjusting attenuation rate is more convenient.

[0033] The above scheme is specific, so that two mirror holders 33 move stably, as shown in Figure 2 And Figure 3 The adjusting mechanism 3 further includes mounting seat 32 arranged in the cavity 11, and the mounting seat 32 is equipped with containing groove 321 for containing the bidirectional screw rod 31, and the containing groove 321 is formed with strip-shaped notch 322 at the top of the mounting seat 32, and the mirror holder 33 is threadedly connected with the bidirectional screw rod 31, and the mirror holder 33 is slidably connected with the strip-shaped notch 322.

[0034] When the bidirectional screw 31 rotates, the mirror holder 33 cannot rotate with the bidirectional screw 31 due to the limitation of the strip-shaped slot 322, and thus the mirror holder 33 slides along the strip-shaped slot 322, so as to realize the movement of the wedge-shaped mirror body 2 in the left-right direction.

[0035] In order to rotate the bidirectional screw 31, one end of the bidirectional screw 31 extends out of the shell 1, and a hand screw head 311 is connected to the part of the bidirectional screw 31 extending out of the shell 1. Figure 1 The hand screw head 311 can realize the rotation of the bidirectional screw 31 without tools, which is convenient for operation. In the embodiment, the hand screw head 311 is a cylindrical structure, and a pattern is arranged on the outer periphery of the hand screw head 311 to increase the friction force and avoid slipping. Of course, the hand screw head 311 can also have other structures, such as a butterfly structure, which can be twisted by hand.

[0036] In some embodiments, in order for the user to intuitively understand the attenuation rate of the adjustable beam attenuator in the current state, an observation slot 13 is formed in the top of the shell 1, and a sliding block 331 is arranged on a mirror holder 33, and the sliding block 331 is slidingly arranged in the observation slot 13. Figure 1 Figure 3 When the wedge-shaped mirror body 2 moves, the sliding block 331 moves with it, and the user can observe the position of the sliding block 331 in the observation slot 13 by naked eye, and then determine whether the attenuation rate is large or small at this time.

[0037] In some embodiments, in order to apply the adjustable beam attenuator to a cage optical system, an insertion hole 14 is formed in the shell 1 for the cage rod to pass through, and the insertion hole 14 penetrates in the front-rear direction of the shell 1. Figure 1 Figure 4 The penetrating insertion hole 14 can make the adjustable beam attenuator be inserted into the cage optical system and be stacked with multiple, instead of being only arranged at the end of the optical path, so as to cope with the attenuation application of high-power laser.

[0038] ​​In order to ensure the stable connection between the hole 14 and the cage rod of the cage optical system, the clamping mechanism 4 is arranged on the shell 1, the clamping mechanism 4 comprises a C-shaped clamping body 41 arranged at one end of the hole 14, the two ends of the C-shaped clamping body 41 are respectively connected with a first clamping plate 42 and a second clamping plate 43, the first clamping plate 42 and the part of the C-shaped clamping body 41 corresponding to the first clamping plate 42 are fixedly connected to the outer wall of the shell 1, the second clamping plate 43 and the part of the C-shaped clamping body 41 corresponding to the second clamping plate 43 are both provided with a gap 44 with the outer wall of the shell 1, the gap 44 enables the C-shaped clamping body 41 to be contracted or relaxed, a locking screw 45 is arranged between the first clamping plate 42 and the second clamping plate 43, and the locking screw 45 is threadedly connected with the first clamping plate 42 or the second clamping plate 43.

[0039] By rotating the locking screw 45, the first clamping plate 42 and the second clamping plate 43 can be made to approach or move away from each other, in the process, the C-shaped clamping body 41 is contracted or relaxed, by contracting the C-shaped clamping body 41, the C-shaped clamping body 41 can clamp the cage rod, and if the C-shaped clamping body 41 is relaxed, the cage rod can slide in the hole 14.

[0040] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0041] The above only describes the preferred embodiments of the utility model, and does not limit the utility model, any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An adjustable beam attenuator, characterized by, The utility model provides a kind of adjustable mirror, including: Shell, which is provided with a cavity inside, and a light hole is provided on the shell and penetrates from front to back, and the light hole is communicated with the cavity; Two wedge-shaped mirror bodies, which are arranged in the cavity and arranged along the front-back direction of the shell, and the thickness of the wedge-shaped mirror body changes gradually in the left-right direction of the shell, and the thickness change directions of the two wedge-shaped mirror bodies are opposite; Adjusting mechanism, which includes a bidirectional screw rod arranged in the cavity, and the bidirectional screw rod is arranged along the left-right direction of the shell, and two thread segments with opposite screw directions are provided on the bidirectional screw rod, and a screw rod is connected with a mirror frame on each thread segment, and the two wedge-shaped mirror bodies are respectively mounted on the two mirror frames.

2. The adjustable beam attenuator of claim 1, wherein, The adjusting mechanism further includes a mounting seat arranged in the cavity, and the mounting seat is provided with a containing groove for containing the bidirectional screw rod, and a strip-shaped notch is formed at the top of the mounting seat, the mirror frame is threadedly connected with the bidirectional screw rod, and the mirror frame is slidingly fitted with the strip-shaped notch.

3. The adjustable beam attenuator of claim 2, wherein, One end of the bidirectional screw rod extends to the outside of the shell, and a hand screw is connected to the part of the bidirectional screw rod extending to the outside of the shell.

4. The adjustable beam attenuator of claim 1, wherein, An observation slot is formed at the top of the shell, and a slider is arranged on one of the mirror frames, and the slider is slidingly arranged in the observation slot.

5. The adjustable beam attenuator of claim 1, wherein, A connecting hole is formed on the shell for the cage rod to pass through, and the connecting hole penetrates along the front-back direction of the shell.

6. The adjustable beam attenuator of claim 5, wherein, The shell is provided with a clamping mechanism, and the clamping mechanism includes a C-shaped clamp body arranged at one end of the connecting hole, and the two ends of the C-shaped clamp body are respectively connected with a first clamping plate and a second clamping plate, and the first clamping plate and the part of the C-shaped clamp body corresponding to the first clamping plate are fixedly connected to the outer wall of the shell, and the second clamping plate and the part of the C-shaped clamp body corresponding to the second clamping plate are spaced from the outer wall of the shell; a locking screw is arranged between the first clamping plate and the second clamping plate, and the locking screw is threadedly connected with the first clamping plate or the second clamping plate.

Images