CN210426771U

CN210426771U - Optical fiber spectrometer structure convenient to adjust

Info

Publication number: CN210426771U
Application number: CN201921261318.XU
Authority: CN
Inventors: 李东波; 曹冬梅; 吴绍锋; 张敏; 施仁杰
Original assignee: Nanjing Bositu Intelligent Technology Co ltd
Current assignee: Nanjing Bositu Intelligent Technology Co ltd
Priority date: 2019-08-06
Filing date: 2019-08-06
Publication date: 2020-04-28
Anticipated expiration: 2029-08-06

Abstract

The utility model discloses a fiber optic spectrometer mechanical structure contains box, optical fiber interface, slit subassembly, reflector component, grating subassembly, CCD subassembly and constitutes, and optical fiber interface, slit subassembly, reflector component, grating subassembly, CCD subassembly are installed on the box body. The light passes through the optical fiber interface, the slit, the collimating lens, the grating and the focusing lens in sequence through the optical fiber and is finally focused on the detector. The utility model discloses do not use any sticky, welding etc. to be difficult to the structure of dismouting, the regulation or the change of each component of being convenient for.

Description

Optical fiber spectrometer structure convenient to adjust

Technical Field

The utility model relates to a spectrum appearance technical field especially relates to a fiber optic spectrometer structure convenient to adjust.

Background

The spectrometer is a scientific instrument which decomposes light with complex components into spectral lines and is composed of a prism or a diffraction grating and the like, and the spectrometer can be used for measuring light rays reflected by the surface of an object. The seven colors of sunlight are visible light, but if the sunlight is decomposed by a spectrometer and arranged according to wavelength, the visible light occupies a small range in the spectrum, and the rest is a spectrum which cannot be distinguished by naked eyes, such as infrared rays, microwaves, ultraviolet rays, X rays and the like. The optical information is captured by a spectrometer, developed by a photographic negative film, or displayed and analyzed by a computerized automatic display numerical instrument, so that the element contained in the article can be detected. This technique is widely used in the detection of air pollution, water pollution, food hygiene, metal industry, and the like.

The application of spectrometer is more and more extensive in recent years, but traditional fiber optic spectrometer speculum, grating and slit all adopt sticky or tight screw fixation, and sticky dismantlement is great with the regulation degree of difficulty, and it is great if need change lens or slit degree of difficulty in the experimental stage, damages the component easily moreover, and the stability of connection is ensured to certain thickness of tight screw needs, consequently the utility model develops a do not need sticky structure, simultaneously because the speculum frame separates with the speculum seat, the volume is far less than traditional method of tight screw fixation lens.

Therefore, there is a need to provide a new fiber spectrometer structure with easy adjustment to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem provide an optic fibre spectrum appearance structure convenient to adjust, adopt bolted connection, cancelled many places adhesive structure in traditional spectrum appearance, be convenient for adjust. In order to solve the technical problem, the utility model provides a fiber optic spectrometer structure convenient to adjust includes that box, fiber interface, slit subassembly, reflector component, grating subassembly, CCD subassembly constitute, and fiber interface, slit subassembly, reflector component, grating subassembly, CCD subassembly are installed on the box body. The light passes through the optical fiber interface, the slit, the collimating lens, the grating and the focusing lens in sequence through the optical fiber and is finally focused on the detector.

Further, the slit needs to be vertically installed on the box body, so that the slit needs to be ensured not to rotate freely, and in addition, in order to reduce stray light, a light blocking plate needs to be used for blocking light rays irradiated outside the collimating mirror. The slit frame and the baffle are divided into two elements in consideration of the difficulty of processing and the cost of replacement. The slot assembly of the final design is shown in fig. 2, the groove on the first plate is slightly thinner than the slot, so that when the slot is fixed on the box body, the slot can be fixed by the threads at four corners so as to be incapable of rotating.

Further, the mirror assembly is not suitable for being fixed by glue because the prototype mirror can be disassembled or replaced, and therefore, the mirror assembly is selected to be fixed on the mirror frame by a locking device, and then the mirror frame is fixed on the box body through fine adjustment threads and springs. However, the conventional method using the set screw requires an additional wall thickness of 2-3mm to ensure the stability of the set screw, which greatly increases the volume of the final structure. Therefore, a new locking mode is designed: the reflector is fixed by using a plastic mirror frame with the inner diameter slightly smaller than that of the reflector, a small groove is formed in the mirror frame to ensure that the mirror can be placed in, a cylindrical protrusion is arranged in the middle of the rear part of the mirror frame and used for fixing the mirror frame to a plate at the rear part, and a screw is arranged in the cylinder and used for ejecting the mirror. The board at rear is fixed with the cylinder arch of mirror holder through two first holding screws, fixes to the box body through three fine setting screw and two springs, considers with fine setting threaded connection department need higher wearability, consequently uses stainless steel material in the junction, and all the other positions use aluminium oxidation blackened. In order to prevent the joint from sliding up and down, a V-shaped groove and a conical groove are respectively dug in the two stainless steel cylinders below the joint.

Furthermore, the grating assembly needs to realize the fixation of the grating and the rotation in the horizontal direction, so that the grating is fixed on the grating seat through the second set screw, and the rotation in the horizontal direction is realized by using three waist-shaped grooves. In order to facilitate processing, the grating seat is divided into an upper part and a lower part which are connected through threads, and in order to ensure that the connection with the box body is not influenced, the bottom of the grating component adopts a countersunk hole. In order to facilitate the fixation of the back waist-shaped groove, a groove with the thickness of 5mm is formed in the upper half part of the waist-shaped groove grating seat, so that the fixation of a screw is facilitated.

Furthermore, the CCD assembly has little influence on precision due to the position and the angle of the CCD under the premise that the grating and the reflector can be adjusted, and the CCD assembly only needs to be fixed at the simulated position because the displacement and the rotation difficulty of the CCD are high. In addition, due to the existence of higher order diffracted light, a filter needs to be installed in front of the CCD. Considering that the optical filter thickness only has 1mm, 1 mm's groove processing degree of difficulty is great, consequently install an optical filter on the slider, through holding screw fixation, the slider side is equipped with holding screw, and CCD subassembly side leaves a 2 mm's groove and supplies holding screw fixation.

Compared with the prior art, the utility model provides a fiber optic spectrometer structure convenient to adjust has following beneficial effect:

the utility model provides an optical fiber spectrometer structure convenient to adjust through setting up gluey and welded structure of nothing, is convenient for adjust to bolted connection stability is also higher than sticky.

Drawings

Fig. 1 is a schematic diagram of the overall structure provided by the present invention;

FIG. 2 is a schematic view of the slot assembly shown in FIG. 1;

FIG. 3 is a schematic diagram of the grating assembly shown in FIG. 1;

FIG. 4 is a schematic view of the CCD assembly shown in FIG. 1;

fig. 5 is a schematic view of the mirror assembly shown in fig. 1.

Reference numbers in the figures: 1. the optical fiber module comprises a box body, 2, a slit component, 201, a baffle, 202, a slit frame, 204, a slit hole, 3, an optical fiber component, 4, a grating component, 401, a countersunk bolt, 402, a waist-shaped groove, 403, a mounting surface, 405, a grating groove, 406, a first fastening screw, 5, a CCD component, 501, a filter frame, 502, a groove, 503, a bolt, 6, a reflector component, 601, a lens base, 602, a first stainless steel block, 604, a second stainless steel block, 606, a lens frame, 607, a cylindrical stainless steel block, 608 and a second fastening screw.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and embodiments.

The embodiment provides a fiber spectrometer structure convenient to adjust, as shown in fig. 1, contain and contain box body 1, slit subassembly 2, fiber assembly 3, grating subassembly 4, CCD subassembly 5 and two reflector assemblies 6, wherein slit subassembly 2, fiber assembly 3, grating subassembly 4, CCD subassembly 5 pass through threaded connection to be fixed on box body 1, and two reflector assemblies 6 pass through spring and box body 1 and link to each other to realize the fixed of vertical direction through three fine setting screw thread pairs.

As shown in fig. 2, the slit assembly 2 includes a baffle plate 201 for shielding stray light, and a slit hole 204, wherein the baffle plate 201 is connected to the slit frame 202 by a positioning pin 206 and is fixed to the case 1 by a screw hole 205 by a bolt, and the slit hole 204 is used for placing a slit.

As shown in fig. 3, the grating assembly 4 includes a lower mounting surface 403 for bearing, the lower mounting surface 403 is connected to the box body 1 by three bolts, and the rotation of the grating assembly is realized by three waist-shaped grooves 402. The lower mounting surface 403 is connected with the grating frame through two countersunk bolts 401, and the grating groove 405 is used for placing a grating and is fixed through two first set screws 406.

As shown in fig. 4, the CCD assembly 5 is fixed to the case 1 by two bottom and one back bolt 503, two front bolt holes 504 are used for fixing the CCD, the filter holder 501 is used for sliding the slide block with the filter, and the groove 502 is used for fixing the slide block.

The mirror assembly 6 is shown in fig. 5 with the mirror base 601 fixed to the cabinet 1 by a spring. The reflector is mounted on a mirror holder 606, a protrusion is arranged at the rear of the mirror holder and can be fixed on a mirror base through a second set screw 608, and three holes are formed in the rear of the mirror base and are respectively provided with a cylindrical stainless steel block 607, a first stainless steel block 602 with a V-shaped groove and a second stainless steel block 604 with a conical groove.

The specific working mode is as follows:

1. the slit assembly 2 is mounted to the case 1 by placing the slit in the slit frame 202, rotating the slit to be vertically positioned.

2. The grating is placed in the grating assembly 4 and fixed by the first set screw 406, and the kidney-shaped groove 402 is aligned with the screw hole at the bottom of the box body 1 and fixed by the bolt.

3. The mirror is placed in the frame 606 and the base 601 is spring-mounted to the case 1. The mirror holder 606 is then mounted on the mirror base 601 and secured with set screws, and the mirror assembly 6 is adjusted to the proper position by means of fine adjustment screw pairs.

4. The CCD assembly 5 is fixed on the box body 1 through a bolt, and then the CCD is installed. The slide block with the optical filter is mounted in the filter holder 501, and the position of the optical filter is adjusted according to the spectral line.

5. And switching on a light source, adjusting the position of a light spot to enable the light spot to be positioned at the center of each element, and adjusting a fine adjustment thread pair behind a focusing mirror according to a spectral line to enable light rays in a required wavelength range to all illuminate the CCD.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims

1. A mechanical structure of a fiber spectrometer is characterized in that:

contain box body (1), slit subassembly (2), optical fiber component (3), grating subassembly (4), CCD subassembly (5) and two reflector assembly (6), wherein slit subassembly (2), optical fiber component (3), grating subassembly (4), CCD subassembly (5) are fixed on box body (1) through threaded connection, and two reflector assembly (6) link to each other through spring and box body (1) to realize the fixed of vertical direction through three fine setting screw thread pair.

2. The mechanical structure of the fiber optic spectrometer according to claim 1, wherein: the slit component (2) comprises a baffle plate (201) and a slit hole (204), the baffle plate (201) plays a role in blocking stray light, the baffle plate (201) is connected with the slit frame (202) through a positioning pin (206) and is fixed on the box body (1) through a threaded hole (205) through a bolt, and the slit hole (204) is used for placing a slit.

3. The mechanical structure of the fiber optic spectrometer according to claim 1, wherein: grating subassembly (4) contain lower installation face (403) that play the bearing effect, link to each other by three bolt between lower installation face (403) and box body (1) to realize grating subassembly's rotation through three waist type groove (402), lower installation face (403) link to each other through two countersunk head bolts (401) with the grating frame, grating groove (405) are used for placing the grating, and realize fixing through two first holding screw (406).

4. The mechanical structure of the fiber optic spectrometer according to claim 1, wherein: the CCD assembly (5) is fixed to the box body (1) through two bottom parts and one bolt (503) at the back, two bolt holes (504) in the front are used for fixing the CCD, the filter frame (501) is used for allowing a sliding block provided with the filter to slide, and the groove (502) is used for enabling the sliding block to be fixed.

5. The mechanical structure of the fiber optic spectrometer according to claim 1, wherein: the reflecting mirror assembly (6) enables a mirror base (601) to be fixed on the box body (1) through a spring, the reflecting mirror is installed on a mirror frame (606), a bulge is arranged at the rear of the mirror frame and can be fixed on the mirror base through a second set screw (608), and three holes are formed in the rear of the mirror base and are respectively provided with a cylindrical stainless steel block (607), a first stainless steel block (602) with a V-shaped groove and a second stainless steel block (604) with a conical groove.