CN217982029U

CN217982029U - Anti-interference spatial filter

Info

Publication number: CN217982029U
Application number: CN202222054117.0U
Authority: CN
Inventors: 胡磊; 刘畅; 张荣伟
Original assignee: Dongguan Hongfu Biological Technology Co ltd
Current assignee: Dongguan Hongfu Biological Technology Co ltd
Priority date: 2022-08-05
Filing date: 2022-08-05
Publication date: 2022-12-06
Anticipated expiration: 2032-08-05

Abstract

The utility model discloses an anti-interference spatial filter, the on-line screen storage device comprises a base, the fixed laser instrument mount that is provided with in one side on base top, the regulation spout has been seted up at the middle part on base top, and the inside rotation of regulation spout is connected with adjusting screw, and adjusting screw's middle part transmission is connected with adjusting block, and adjusting block's the fixed filter frame that is provided with in top, the fixed filter subassembly that is provided with in inboard of filter frame, filter subassembly include the filter box, polarization filter and closing cap, and the assembly draw-in groove has been seted up at the middle part at the filter box back, the utility model relates to an anti-interference spatial filter adopts polarization filtering's mode to realize the filtering work to the laser beam, can be according to the user demand, and nimble debugging is used, and the last hand is simple and convenient, and the operation degree of difficulty is low, can obtain pure ideal stable and reliable base mode light beam again, does not receive the influence of factors such as transportation, removal and for a long time, and the interference killing feature is strong, and is safe and stable, and the practicality is high.

Description

Anti-interference spatial filter

Technical Field

The utility model relates to a spatial filter technical field specifically is an anti-interference spatial filter.

Background

In smoke detection of a smoke extractor, in order to obtain accurate measurement results, it is required that a laser beam irradiated to a measuring cell is a pure single-mode laser beam, that is, the light energy distribution on the cross section of the beam shows an ideal gaussian distribution. The original beam emitted by the laser often contains a small amount of higher-order mode beam in addition to the fundamental mode beam (i.e., the ideal gaussian beam), along with stray light caused by particles or interface roughness on the path traveled by the beam. In order to remove the interference of the high-order mode beam and the stray light, the current instruments on the market generally adopt one of the following two methods for processing: firstly, the most common is that a traditional pinhole spatial filter is adopted, the filtering effect is good, but the traditional pinhole spatial filter is easily influenced by mechanical vibration or deformation, after the instrument is transported for a long distance or even moved for a short distance or placed for a long time, the light beam deformation can be caused as long as the pinhole is subjected to micron-sized displacement, the readjustment of the pinhole needs to be completed by professional personnel, and inconvenience is caused to users; secondly, the light beam is not filtered, and the light beam is irradiated onto the measuring cell after being expanded, so that the measuring accuracy is reduced, and particularly the upper limit of the measurement is reduced.

The existing spatial filter has poor anti-interference capability and high precision and speciality, and is not convenient for users to directly debug and use.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an anti-jamming space filter to solve the current space filter interference killing feature who provides among the above-mentioned background art relatively poor, precision and specialty are high, the direct debugging problem of using of the user of being not convenient for.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides an anti-interference spatial filter, includes the base, the fixed laser instrument mount that is provided with in one side on base top, the regulation spout has been seted up at the middle part on base top, the inside rotation of adjusting the spout is connected with adjusting screw, adjusting screw's middle part transmission is connected with adjusting block, adjusting block's the fixed filter frame that is provided with in top, the fixed filter subassembly that is provided with in inboard of filter frame, filter subassembly includes filtering box, polarization filter and closing cap, assembly slot has been seted up at the middle part at the filtering box back, the block is connected with polarization filter on the assembly slot, the bottom at the filtering box back articulates there is the closing cap, adopts polarization filtering's mode to realize the filtering work to the laser beam, can be according to the user demand, nimble debugging use, the last hand is simple and convenient, and the operation degree of difficulty is low, can obtain the ideal stable and reliable fundamental mode light beam again, does not receive the influence of factors such as transportation, removal and long-time removal, and the interference killing feature is strong, and safety and stability, and practicality are high.

Preferably, one side of the top end of the base far away from the laser fixing frame is fixedly provided with a transmission frame, a transmission lens is fixedly mounted on the transmission frame, the transmission lens, the filter box and the laser fixing frame are located on the same horizontal line, and filtering is stable and reliable.

Preferably, the inside of base rotates and is connected with the drive worm, the fixed regulation carousel that is located the base outside that is provided with of one end of drive worm, the fixed driven worm wheel that is provided with of one end of adjusting screw, one side of drive worm is connected with the meshing of one side of driven worm wheel, adjusts steadily reliably.

Preferably, one side of adjusting the spout is fixed and is provided with the distance scale, adjusts more accurate quick.

Preferably, the fixing clamp holes are formed in the two sides of the top end of the filter box, two fixing buckles in one-to-one correspondence with the two fixing clamp holes are fixedly arranged at one end of the sealing cover, and the filter box is simple and convenient to assemble.

Preferably, incident unthreaded hole has been seted up at the positive middle part of filtering box, polarized light hole has been seted up at the middle part of closing cap, the periphery of assembly draw-in groove inner wall one side and the inboard periphery of closing cap are all fixed and are provided with and prevent scraping the cushion, can realize the assembly and the dismantlement to the polarization filter fast, convenient to use, the maintenance of being convenient for.

Compared with the prior art, the beneficial effects of the utility model are that: this space filter adopts polarization filtering's mode to realize the filtering work to the laser beam, can be according to the user demand, and nimble debugging is used, and it is simple and convenient to go up the hand, and the operation degree of difficulty is low, can obtain pure ideal reliable and stable basic mode light beam again, does not receive the influence of factors such as transportation, removal and long-time moving, and the interference killing feature is strong, safety and stability, and the practicality is high.

Drawings

Fig. 1 is a schematic structural diagram of the spatial filter of the present invention;

FIG. 2 is a top cross-sectional view of the adjusting screw of the present invention;

fig. 3 is a schematic structural diagram of the filtering assembly of the present invention;

fig. 4 is an enlarged view of a part a of the present invention.

In the figure: 1. a base; 2. a laser fixing frame; 3. a filtering component; 31. a filter box; 32. assembling a clamping groove; 33. sealing the cover; 34. a scratch-resistant rubber mat; 35. fixing the clamping hole; 36. a polarization filter; 37. fixing a buckle; 38. a polarized light aperture; 39. an incident light aperture; 4. a filter frame; 5. a transmission frame; 6. a transmissive lens; 7. adjusting the sliding chute; 8. adjusting the sliding block; 9. adjusting the screw rod; 10. distance graduation; 11. adjusting the turntable; 12. a drive worm; 13. a driven worm gear.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

Referring to fig. 1-4, the utility model provides an anti-interference spatial filter, which comprises a base 1, a laser fixing frame 2 is fixedly arranged on one side of the top end of the base 1, an adjusting chute 7 is arranged in the middle of the top end of the base 1, an adjusting screw 9 is rotatably connected in the adjusting chute 7, an adjusting slider 8 is connected in the middle of the adjusting screw 9 in a transmission way, a filter frame 4 is fixedly arranged on the top end of the adjusting slider 8, a filter component 3 is fixedly arranged on the inner side of the filter frame 4, the filter component 3 comprises a filter box 31, a polarization filter 36 and a sealing cover 33, an assembly clamping groove 32 is arranged in the middle of the back of the filter box 31, the polarization filter 36 is connected on the assembly clamping groove 32 in a clamping way, the sealing cover 33 is hinged on the bottom of the back of the filter box 31, a transmission frame 5 is fixedly arranged on one side of the top end of the base 1 away from the laser fixing frame 2, a transmission lens 6 is fixedly arranged on the transmission frame 5, the transmission lens 6, the filter box 31 and the laser fixing frame 2 are positioned on the same horizontal line, the inner part of the base 1 is rotatably connected with a driving worm 12, one end of the driving worm 12 is fixedly provided with an adjusting turntable 11 positioned outside the base 1, one end of an adjusting screw 9 is fixedly provided with a driven worm wheel 13, one side of the driving worm 12 is meshed with one side of the driven worm wheel 13, one side of an adjusting chute 7 is fixedly provided with a distance scale 10, both sides of the top end of the filter box 31 are provided with fixing clamp holes 35, one end of a sealing cover 33 is fixedly provided with two fixing buckles 37 which correspond to the two fixing clamp holes 35 one by one, the middle part of the front surface of the filter box 31 is provided with an incident light hole 39, the middle part of the sealing cover 33 is provided with a polarized light hole 38, the periphery of one side of the inner wall of the assembling clamping groove 32 and the periphery of the inner side of the sealing cover 33 are both fixedly provided with anti-scraping rubber pads 34, the laser beam filtering is realized by adopting a polarization filtering mode, a pure, ideal, stable and reliable fundamental mode light beam can be obtained, the influence of factors such as transportation, movement and long-time moving is avoided, the anti-interference capability is strong, and the laser beam filtering device is safe and stable.

When the embodiment of the application is used: the spatial filter is stably placed, the fixing buckle 37 is buckled, the spatial filter is separated from the fixing clamp hole 35, the polarization filter 36 is clamped in the assembling clamping groove 32, the sealing cover 33 is closed for clamping and fixing, the laser is installed on the laser fixing frame 2, a light outlet of the laser is formed, the light inlet is formed in 39, the polarization filter 36, the polarization hole 38 and the transmission lens 6 are located on the same horizontal line, the adjusting rotary disc 11 is rotated, the driven worm wheel 13 is driven to rotate through the driving worm 12, the adjusting screw 9 is further driven to rotate, the filter frame 4 is driven to move integrally through the adjusting slide block 8, the distance between the filter assembly 3 and the laser is adjusted according to the distance scale 10, the filtering work of a pure laser beam is achieved in a polarization filtering mode, an ideal, stable and reliable base mode light beam can be obtained, the influences of factors such as transportation, movement and long-time movement are avoided, the anti-interference capacity is high, safety and stability are achieved, and high practicability is achieved.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. An anti-interference spatial filter, includes base (1), its characterized in that: the fixed laser instrument mount (2) that is provided with in one side on base (1) top, regulation spout (7) have been seted up at the middle part on base (1) top, the inside of adjusting spout (7) is rotated and is connected with adjusting screw (9), the middle part transmission of adjusting screw (9) is connected with adjusting block (8), the fixed filtering frame (4) that is provided with in top of adjusting block (8), the fixed filtering subassembly (3) that is provided with in inboard of filtering frame (4), filtering subassembly (3) are including filtering box (31), polarization filter (36) and closing cap (33), assembly draw-in groove (32) have been seted up at the middle part at filtering box (31) back, the block is connected with polarization filter (36) on assembly draw-in groove (32), the bottom at filtering box (31) back articulates there is closing cap (33).

2. The interference rejection spatial filter of claim 1, wherein: the fixed transmission frame (5) that is provided with in one side of keeping away from laser instrument mount (2) on base (1) top, fixed mounting has transmission lens (6) on transmission frame (5), transmission lens (6), filter box (31) and laser instrument mount (2) are located same water flat line.

3. The interference rejection spatial filter of claim 1, wherein: the inside of base (1) rotates and is connected with drive worm (12), the fixed regulation carousel (11) that are located base (1) outside that are provided with of one end of drive worm (12), the fixed driven worm wheel (13) that are provided with of one end of adjusting screw (9), one side of drive worm (12) is connected with one side meshing of driven worm wheel (13).

4. The spatial interference rejection filter according to claim 1, wherein: one side of the adjusting chute (7) is fixedly provided with a distance scale (10).

5. The interference rejection spatial filter of claim 1, wherein: fixing clip holes (35) have all been seted up to the both sides on filter box (31) top, the one end of closing cap (33) is fixed be provided with two fixing clip hole (35) one-to-one fixed buckle (37).

6. The spatial interference rejection filter according to claim 1, wherein: incident light hole (39) have been seted up at the positive middle part of filtering box (31), polarized light hole (38) have been seted up at the middle part of closing cap (33), the periphery of assembly card groove (32) inner wall one side and the periphery of closing cap (33) inboard are all fixed and are provided with and prevent scraping cushion (34).