1. Highlight sampling device based on optical fiber sample, its characterized in that, including protection sample base plate (1), mounting base (3), optical fiber stick (2), protection sample base plate (1) array is provided with the first via hole of a plurality of (11), and every first via hole (11) matches mounting base (3), the second via hole has been seted up on mounting base (3), optical fiber stick (2) are fixed to be set up downthehole at first via hole (11) and second.

2. An intense light sampling device based on optical fiber sampling according to claim 1, wherein the light facing surface of the protective sampling substrate (1) after optical polishing is provided with a gold-plated film by chemical or vacuum plating.

3. An intense light sampling device based on optical fiber sampling according to claim 2, wherein said gold-plated film is plated with a protective film.

4. Optical fiber sampling-based intense light sampling device according to claim 1, characterized in that said first through hole (11) comprises a succession of coaxial arrangements in succession

A sampling part (111) for placing the end part of the optical fiber rod (2) to obtain a light beam;

the first guide groove part is convenient for the optical fiber rod (2) to be inserted into the sampling part (111) and limit the mounting base (3);

and the first fixing part (114) is fixedly connected with the outer side wall of the second fixing part (301) in the mounting base (3).

5. The sampling device for sampling intense light based on optical fiber according to claim 4, wherein the first guide groove part comprises a first horn section (112) and a first step section (113) which are arranged in sequence, the first horn section (112) facilitates the insertion of the optical fiber rod (2) into the sampling part (111), and the first step section (113) limits the position of the mounting base (3) entering the first through hole (11).

6. The intense light sampling device based on optical fiber sampling according to claim 1, characterized in that the optical fiber rod (2) is a 2-layer or 3-layer full-glass structure, the optical fiber rod (2) is a full-glass quartz optical fiber rod (2), and the edges of the two ends of the optical fiber rod (2) are chamfers after optical polishing.

7. Optical fiber sampling-based highlight sampling device according to claim 1 characterized by that, the via hole on the mounting base (3) comprises of coaxial arranged in sequence

The outer side wall of the second fixing part (301) is provided with a connecting and fixing structure matched with the first fixing part (114) in the first through hole (11);

the second guide groove part (302) is convenient for the optical fiber rod (2) to be inserted into the optical fiber tail part arranging part;

and the optical fiber tail part arranging part is used for arranging the tail part of the optical fiber.

8. Intense light sampling device based on optical fiber sampling according to claim 2, characterized in that after the optical fiber rod (2) is placed in the mounting base (3), a fixing glue is provided, which is injected from the entrance (3011) of the second fixing part (301), the refractive index of the fixing glue is lower than that of the cladding material.

9. Intense light sampling device based on optical fiber sampling according to claim 7, characterized in that the inner wall of the second fixed part (301) is also provided with a relief structure.

10. A method of making an optical fiber sampling based intense light sampling device according to any one of claims 1 to 9 including the steps of:

s1, determining the diameter, the thickness, the sampling spatial resolution and the sampling hole size of the protective sampling substrate (1) according to the parameters of the laser system to be tested, and determining the size of the optical fiber rod (2);

s2, processing and polishing the protective sampling substrate (1), then arraying and plating first through holes (11), and plating films on the first through holes (11); processing the optical fiber rod (2) and the mounting base (3);

s3, assembling the optical fiber rod (2) and the mounting base (3) to form an optical fiber sampling assembly;

s4, assembling the optical fiber sampling assembly and the protective sampling substrate (1).

Background

In recent years, laser technology has been developed rapidly, and laser systems have been widely used in various fields. With the application of the method, accurate measurement of laser spot characteristic parameters becomes an urgent problem to be solved.

Common methods for acquiring characteristic parameters of a laser system include a CCD camera imaging method and an array detection method: the imaging method of the CCD camera has the greatest advantage that the real-time imaging can be realized at high resolution, but when large-area light spots are shot, the required object distance is too long, so that the system is difficult to integrate, and meanwhile, the image correction technology is also complex and has certain influence on the precision. The method is mainly used for static measurement of the system, and is limited in application to a dynamic flight platform; the array detection method realizes the measurement of the spatial distribution of the light spots by means of spatial attenuation sampling, has the advantages of compact layout and small volume, can increase the detection area by increasing the number of units for large-area light spots, has small cost of volume and weight, and is more suitable for dynamic measurement of a flight platform.

However, as for the technology adopted by the array measurement method, there are mainly the following technical problems: firstly, the spectral response consistency is poor, and especially for a measurement mode of sampling by adopting a high-reflection film, certain influence is exerted on the measurement of a spectral synthesis laser system; secondly, the angle compatibility is poor, and the angle range can only be compatible with the incidence angle range of plus and minus a few degrees, and a larger angle needs to be corrected by software, so that the measurement accuracy is influenced to a certain extent; third, power tolerance is poor and cannot meet the requirement of high power measurement. According to investigation, if one of the three technical difficulties is solved independently, the method can be realized through the prior art; if all the technical problems are solved on one measuring device, the technical difficulty is high.

Disclosure of Invention

In order to solve the problems in the background art, the invention provides an intensive light sampling device based on optical fiber sampling and a preparation method thereof, and the intensive light sampling device comprises the following specific steps:

highlight sampling device based on optic fibre sample, including protection sample base plate, mounting base, optic fibre stick, protection sample base plate array is provided with the first via hole of a plurality of, and mounting base is matchd to every first via hole, the second via hole has been seted up on the mounting base, the optic fibre stick is fixed to be set up in first via hole and second via hole.

Specifically, the light-facing surface of the protective sampling substrate after optical polishing is provided with a gold-plated film in a chemical or vacuum plating mode.

Specifically, the gold-plated film is plated with a protective film.

Specifically, the first via hole comprises a plurality of sequentially and continuously coaxially arranged via holes

The sampling part is used for placing the end part of the optical fiber rod to obtain a light beam;

the first guide groove part is convenient for the optical fiber rod to be inserted into the sampling part and limit the mounting base;

the first fixing part is fixedly connected with the outer side wall of the second fixing part in the mounting base.

Specifically speaking, first guide slot portion is including the first loudspeaker section, the first bench section that set gradually, in the first loudspeaker section made things convenient for the optical fiber rod to insert the sample division, the position that first bench section restriction mounting base entered into first via hole.

Specifically, the optical fiber rod is of a 2-layer or 3-layer full-glass structure, the optical fiber rod is a full-glass quartz optical fiber rod, and the edges of the two ends of the optical fiber rod are chamfers after optical polishing.

Specifically, the through holes on the mounting base are sequentially and coaxially arranged

The outer side wall of the second fixing part is provided with a connecting and fixing structure matched with the first fixing part in the first via hole;

the second guide groove part is convenient for the optical fiber rod to be inserted into the optical fiber tail installation part;

and the optical fiber tail part arranging part is used for arranging the tail part of the optical fiber.

Specifically, a fixing glue is arranged after the optical fiber rod is placed in the mounting base, the fixing glue is injected from an inlet of the second fixing portion, and the refractive index of the fixing glue is lower than that of the cladding material.

Specifically, the inner wall of the second fixing portion is further provided with a concave-convex structure.

The preparation method of the strong light sampling device based on optical fiber sampling comprises the following steps:

s1, determining the diameter, the thickness, the sampling spatial resolution and the sampling hole size of the protective sampling substrate according to the parameters of the laser system to be tested, and determining the size of the optical fiber rod;

s2, processing and polishing the protective sampling substrate, then making a first through hole in an array, and coating the first through hole; processing the optical fiber rod and the mounting base;

s3, assembling the optical fiber rod and the mounting base to form an optical fiber sampling assembly;

s4, assembling the optical fiber sampling assembly and the protective sampling substrate.

The invention has the beneficial effects that:

(1) the protective sampling substrate has the laser sampling with wide spectral response characteristic, large angle, wide capacitance and high damage threshold, and can meet the high compatibility requirement of measuring equipment in the characteristic parameter measurement of a laser system.

(2) The gold-plated film can improve the surface reflectivity of the protective sampling substrate to more than 95%, reduce the requirement on the heat capacity of the sampling substrate and improve the strong light protection capability of the test equipment.

(3) The setting of protection film can improve rete surface mechanical strength, also is convenient for clear up when dirty to the surface of protection sample base plate.

(4) The convenient fixing of optic fibre stick of setting up of first via hole and second via hole also protects the optic fibre stick at this in-process, also makes things convenient for the installation of optic fibre sampling subassembly and protection sample base plate in addition.

(5) The edge breakage of the optical fiber thin layer can be placed through polishing of the optical fiber rod and the chamfering, and the space consistency of the sampling light spot is guaranteed.

(6) The fixing glue may be such that light entering the cladding does not leak out of the fiber rod.

(7) The inner wall of the second fixing part is also provided with a concave-convex structure, so that the fixing glue and the optical fiber rod can be prevented from falling off together.

(8) The method discloses an installation mode of the highlight sampling device for optical fiber sampling, and is simple and convenient and high in success rate.

Drawings

FIG. 1 is an overall structure diagram of a protective sampling substrate;

FIG. 2 is an overall view of the rear end face of the protective sampling substrate;

FIG. 3 is a partial exploded cross-sectional view of a configuration of a guard sampling substrate;

in the figure:

1. protecting the sampling substrate; 11. a first via hole; 110. a protrusion; 111. a sampling section; 112. a first horn section; 113. a first step section; 114. a first fixed part; 2. an optical fiber rod; 3. mounting a base; 301. a second fixed part; 3011. an inlet; 302. a second guide groove part; 303. and an optical fiber tail installation part.

Detailed Description

As shown in fig. 1-3, highlight sampling device based on optical fiber sampling, including protection sample base plate 1, mounting base 3, optical fiber rod 2, protection sample base plate 1 array is provided with the first via hole 11 of a plurality of, and mounting base 3 is matchd to every first via hole 11, the second via hole has been seted up on mounting base 3, optical fiber rod 2 is fixed to be set up in first via hole 11 and second via hole. The optical fiber rod 2 is a full-glass quartz optical fiber rod 2, the sampling light beam is guided to the rear end of the protective sampling substrate 1 by utilizing the total reflection principle of the optical fiber rod 2, the conduction of the sampling light beam is realized, and the requirements of large angle and wide spectrum compatibility are met by adopting the full-glass optical fiber with large numerical aperture.

Specifically, the spacing between adjacent vias on the same board is designed according to the measurement spatial resolution requirements. The protective sampling substrate 1 is a copper substrate with large heat capacity, the thickness is determined according to the light emitting capacity, and the light-facing surface of the protective sampling substrate 1 after optical polishing is provided with a gold-plated film in a chemical or vacuum plating mode, so that the surface reflectivity is improved to more than 95%. Optimally, the gold-plated film is plated with the protective film, so that the mechanical strength of the plated film surface can be improved, and the gold-plated film is convenient to treat when the surface is stained.

The first via hole 11 includes a sampling portion 111, a first guide groove portion, and a first fixing portion 114, which are sequentially and coaxially disposed. The protective sampling substrate 1 is cut at least at the thickness of the first fixing portion 114 to form a protruding portion 110, at least the first fixing portion 114 protrudes out of the plate body. Thereby making it possible to reduce the overall weight of the entire apparatus. In the invention, the inclination of the first horn section 112 and the angle of the central axis of the first horn section 112 are 30-60 degrees, so that the optical fiber rod 2 can be conveniently inserted into the sampling part 111, and the phenomenon of edge breakage of an optical fiber cladding when an optical fiber is inserted is prevented. The first step 113 limits the position of the mounting base 3 entering the first through hole 11, and prevents the mounting base 3 from entering the first through hole 11 further to twist off the optical fiber, thereby also centering the optical fiber rod 2. The first fixing portion 114 is fixedly connected with the outer side wall of the second fixing portion 301 in the mounting base 3, and in the invention, the inner side wall of the first fixing portion 114 and the outer side wall of the second fixing portion 301 are provided with matched thread structures.

The optical fiber rod 2 is of a 2-layer or 3-layer full-glass structure, and the appropriate optical fiber numerical aperture is selected according to the application angle range of the protection sampling substrate 1. The range of the use angle is the incident angle of the protective sampling substrate 1. The edges of the two ends of the optical fiber rod 2 are chamfers after optical polishing, so that the end face is ensured to have no broken edge, and the sampling consistency of each channel is kept. The fiber diameter is determined according to the sampling power, and a full glass fiber with the diameter of 0.76mm is adopted in the embodiment. The cladding of the optical fiber should be as thin as possible under the condition of ensuring that total reflection is not destroyed, the core-wall ratio (the ratio of the fiber core to the cladding) is usually not less than 20:1, and the incident light of the cladding of the optical fiber and the edge breakage of the cladding in the using process are avoided.

As shown in fig. 2, the second via hole in the mounting base 3 includes a second fixing portion 301, a second guide groove portion 302, and a fiber tail installation portion, which are sequentially, coaxially provided. 303, a thread structure matched with the inner side wall of the first fixing part 114 is further arranged on the outer side wall of the second fixing part 301, so that the mounting base 3 fixed with the optical fiber rod 2 is mounted on the protective sampling substrate 1 as an optical fiber sampling assembly. Preferably, the mounting base 3 is restricted from entering the position of the first fixing portion 114 again.

After the optical fiber rod 2 is placed in the mounting base 3, fixing glue is provided, and the fixing glue is injected from the inlet 3011 of the second fixing portion 301. The fixing glue is optical glue, in order to prevent light entering the cladding from leaking from the optical fiber rod 2, the optical glue with the refractive index lower than that of the optical fiber cladding material is selected for bonding, the total reflection condition of the whole optical fiber is not damaged, in the embodiment, the fixing glue with the refractive index of 1.3 is used for bonding, the glue is high-temperature curing glue and is cured in a constant temperature box, and the ultraviolet curing glue with the low refractive index can also be used for preparing the sampling panel.

Preferably, the inner wall of the second fixing portion 301 is further provided with a concave-convex structure, so that the fixing glue and the optical fiber rod 2 can be prevented from falling off together. For convenience of processing, the concave-convex structure is a thread structure. The second guiding groove portion 302 comprises a second horn section, so that the optical fiber rod 2 can be conveniently inserted into the optical fiber tail portion arranging portion at the rear end, and the phenomenon that the optical fiber cladding is broken when the optical fiber rod is inserted is avoided. In the invention, the sampling part 111 of the first via hole 11 and the fiber tail mounting part in the second via hole are both in millimeter order and have diameters of 0.8 mm.

The preparation method of the strong light sampling device based on optical fiber sampling comprises the following steps:

s1, determining the diameter, the thickness, the sampling spatial resolution and the sampling hole size of the protective sampling substrate 1 according to the parameters of the laser system to be tested, and determining the diameter of the optical fiber rod 2;

s2, processing and polishing the protective sampling substrate 1, then arraying the first through holes 11, and plating the first through holes 11; the optical fiber rod 2 is processed, and the process of punching the through holes in the array is to effectively prevent the through holes from being blocked and prevent the coating from failing after the protective sampling substrate 1 and the mounting base 3 are processed and before the coating is carried out; the first via hole 11 and the second via hole are positioned in strict coaxial alignment, so that the optical fiber is prevented from being broken due to stress during installation or transportation.

S3, assembling the optical fiber rod 2 and the mounting base 3 to form an optical fiber sampling assembly; the mounting base 3 is placed on a plane, the optical fiber rod 2 is vertically placed in a corresponding second through hole in the mounting base 3, and one end of the optical fiber rod 2 is guided into the second through hole by means of the second guide groove portion 302. The glue dispenser is used to dispense a set amount of low refractive index fixing glue into the second fixing portion 301, in this example, the amount of fixing glue is 2ml, and the consistency of the glue amount of each unit needs to be ensured. Placing the second via hole with the fixed glue in a constant temperature box at 60 ℃ for curing, and irradiating and curing by using an ultraviolet lamp if the second via hole is the ultraviolet curing glue with low refractive index;

s4, assembling the optical fiber sampling assembly and the protective sampling substrate 1; protection sample base plate 1 shady face is placed to the level up, and optical fiber sampling subassembly is vertical puts into first guide slot portion, relies on subassembly gravity and the loudspeaker section of first guide slot portion to make optic fibre stick 2 nature landing in the base plate thief hole, and rotatory optical fiber sampling subassembly relies on the subassembly screw thread to make subassembly and protection sample base plate 1 fixed.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical invention and the inventive concept thereof are equivalent to or changed within the technical scope of the present invention.