CN207529040U

CN207529040U - The launching fiber that a kind of laser uniformly disperses

Info

Publication number: CN207529040U
Application number: CN201721270213.1U
Authority: CN
Inventors: 孙聪; 陈志文
Original assignee: Wuhan Capital Association Hong Kang Polytron Technologies Inc
Current assignee: Wuhan Capital Association Hong Kang Polytron Technologies Inc
Priority date: 2017-09-29
Filing date: 2017-09-29
Publication date: 2018-06-22
Anticipated expiration: 2027-09-29

Abstract

The utility model discloses the launching fiber that a kind of laser uniformly disperses, which includes：Optical fiber incidence end, fiber body and fiber exit end；Optical fiber incidence end sets and is equipped with frosted layer there are one the interior surface of concavees lens, fiber body, fiber exit end sets a collimation lens, the utility model is by improving inside of optical fibre surface texture, and add the laser that concavees lens carry out dissipated energy high concentration, collimation lens is recycled by the parallel injection of rambling laser alignment, so as to make the collected signal strength of reception optical fiber uniform, and laser is avoided accidentally to penetrate may endanger caused by human eye；Again by increasing the diameter of fiber outlet end come the irradiated area of expansion of laser light, so as to promote the acquisition rate of data and accuracy.

Description

The launching fiber that a kind of laser uniformly disperses

Technical field

The utility model is related to the launching fibers that medical imaging field more particularly to a kind of laser uniformly disperse.

Background technology

With the development of near infrared light spectral imaging technology, research of the near infrared light spectrum imaging system in terms of medical treatment also obtains A degree of breakthrough, be born various hurtless measures or the traumatic smaller skill for measuring live body human brain structure and function in succession Art, wherein most of can be shown the result of measurement by image format, these technologies are referred to as brain imaging technique.

At present, the cerebral function imaging technology of neuroscientist's most attention is optical fiber type cerebral function imaging technology, the technology Emit 1 tunnel or multi-path laser by launching fiber via cerebral cortex diffusion to return, then acquired by reception optical fiber to obtain brain Internal information.

But current techniques also there are it is certain the defects of, due to laser have energy height concentrate speciality, actual use Without processing in if, it may appear that collected signal is stronger all the way in the reception optical fiber around launching fiber, and other letters Number all weaker situation.In addition, the laser that energy height is concentrated, if being accidentally irradiated to human eye, is likely to result in certain injury.

Invention content

For the above-mentioned prior art when the defects of, the purpose of this utility model is that proposing what a kind of laser uniformly dispersed Launching fiber, which can dissipate the laser beam splitter of energy high concentration again so that it can which to launch energy uniform Laser.

The above-mentioned of the utility model has the technical effect that is be achieved by the following technical programs.

The launching fiber that a kind of laser uniformly disperses, the optical fiber include optical fiber incidence end, fiber body and fiber exit end；

The optical fiber incidence end is set there are one concavees lens, and function is by the importing of the laser-beam divergence of energy high concentration Optical fiber；The fiber exit end is additionally provided with a self-focusing collimation lens, and function is to collimate rambling laser, Its principle is when being propagated between different medium using light, and the direction of propagation regular can change, the collimation lens Refractive Index of Material distribution is gradually successively decreased along longitudinal direction, so that laser enters after collimation lens change propagation side that can be smooth To finally tending to exiting parallel.

Preferably, the optical fiber includes three layers successively outward from center：Fibre core, covering and coat.

Specifically, the fibre core is glass of high refractive index fibre core；

The covering is the glass-clad of low-refraction；

The material of the coat is resin.

Specifically, the fiber body interior surface is equipped with frosted layer；

The frosted layer is arranged on fiber glass covering inner surface.

Specifically, the diameter at the fiber exit end is more than the diameter of the fiber body, the purpose is to make laser emitting When irradiated area bigger, to improve the acquisition rate of data and accuracy.

Specifically, the concavees lens and the self-focusing collimation lens are to be separately mounted to optical fiber by plastic protective sleeve In incidence end and fiber exit end；

The plastic protective sleeve is primarily to protection lens and easy to disassemble.

Compared with prior art, the beneficial effects of the utility model are：Provide the transmitting that a kind of laser uniformly disperses Optical fiber by setting a concavees lens in optical fiber incidence end, for the laser beam of dissipated energy high concentration, disperses laser beam Importing optical fiber；One self-focusing collimation lens is set again at fiber exit end, and function is that fiber exit end is disorderly and unsystematic Laser become the laser beam of exiting parallel, be more uniformly distributed laser energy；In addition, it is equipped with frosted in fiber body interior surface Layer, the frosted layer are arranged on the glass-clad inner surface of inside of optical fibre, and function is that laser is made to occur to overflow instead in optical fiber inner surface Penetrate, with the energy of dispersion laser, by the way that these three structures are combined, so that it may so that laser uniformly disperse be irradiated to brain skin Layer, so as to make signal strength that reception optical fiber receives also than more uniform, avoid laser be accidentally mapped to human eye may caused by injury.

Description of the drawings

Fig. 1 is the overall structure figure of the utility model.

In figure：1st, optical fiber incidence end；2nd, fiber body；3rd, fiber exit end；4th, concavees lens；5th, self-focusing collimation lens； 6th, frosted layer；7th, plastic protective sleeve.

Specific embodiment

It, below will knot in order to which the purpose of this utility model, technical solution and technique effect is made more intuitively to express Specific embodiment is closed, and the utility model is made into description detailed once with reference to attached drawing.

Embodiment 1

As shown in Figure 1, the present embodiment provides the launching fiber that a kind of laser uniformly disperses, including：Optical fiber incidence end 1, light Fine main body 2 and fiber exit end 3 are all provided in optical fiber incidence end 1 and fiber exit end 3 there are one optical lens.

As the present embodiment preferred embodiment, the optical fiber incidence end 1 is set there are one concavees lens 4, effect be by The importing optical fiber of laser dispersion.

The concavees lens 4 are set there are one plastic protective sleeve 7, and the concavees lens 4 are mounted on by the plastic protective sleeve 7 In optical fiber incidence end 1.

As the present embodiment preferred embodiment, set at fiber exit end 3 there are one self-focusing collimation lens 5, Effect is by the parallel injection of the rambling laser beam datum of exit end；

The self-focusing collimation lens 5 is when being propagated in different medium using light, and the direction of propagation can regular hair The raw principle changed；

The distribution of 5 Refractive Index of Material of self-focusing collimation lens is radially gradually reduced, when laser injects self-focusing standard Refraction can be recurred after straight lens 5, finally smoothly can tend to exiting parallel.

The self-focusing collimation lens 5 is mounted on the fiber exit end 3 by the plastic protective sleeve 7, institute Plastic protective sleeve 7 is stated mainly to play the role of fixed and protect lens.

Embodiment 2

As shown in Figure 1, the present embodiment provides the launching fiber that a kind of laser uniformly disperses, with embodiment 1 difference lies in The inside of optical fibre is additionally provided with frosted layer；

As the present embodiment preferred embodiment, 2 interior surface of fiber body is equipped with frosted layer 6, and effect is Diffusing reflection occurs when laser being made to be propagated in optical fiber, so as to the energy of dispersion laser；

The optical fiber is divided into three layers from center outward, including fibre core, covering and coat；

The fibre core is glass of high refractive index material, the covering is light material, the coat is tree Fat material；

The frosted layer 6 is arranged on the glass-clad inner surface.

By combining techniques described above scheme, it is possible to realize the following technique effect of the utility model：

The laser of energy high concentration is become into finely dispersed laser beam, then is irradiated on cerebral cortex and occurs to overflow instead Penetrate, by the signal that receives of reception optical fiber acquisition, can thus greatly improve the collected signal of reception optical fiber stability and Accuracy is also avoided that laser accidentally penetrates harm caused by human eye.

Embodiments described above is only the part of the embodiment of the utility model, instead of all the embodiments. Embodiment based on the utility model, those of ordinary skill in the art are obtained under the premise of creative work is not made All other embodiment belongs to the range that the utility model patent is protected.

Claims

1. the launching fiber that a kind of laser uniformly disperses, which goes out including optical fiber incidence end (1), fiber body (2) and optical fiber Penetrate end (3), which is characterized in that the optical fiber incidence end (1) is equipped with the concavees lens (4) for laser to be uniformly dispersed, the light Frosted layer (6) is equipped in fine main body (2), the fiber exit end (3) is equipped with the autohemagglutination for dispersed light to be transformed into directional light Focus collimation lens (5).

2. the launching fiber that laser according to claim 1 uniformly disperses, which is characterized in that the optical fiber is outside from center Include fibre core, covering and coat successively；

The fibre core is glass of high refractive index fibre core, and the covering is light covering, and the coat is resin.

3. the launching fiber that laser according to claim 1 uniformly disperses, which is characterized in that frosted layer (6) setting In glass-clad inner surface.

4. the launching fiber that laser according to claim 1 uniformly disperses, which is characterized in that the fiber exit end (3) Diameter be more than fiber body (2) diameter.

5. the launching fiber that laser according to claim 1 uniformly disperses, which is characterized in that the concavees lens (4) and institute Self-focusing collimation lens (5) is stated to be separately mounted in optical fiber incidence end (1) and fiber exit end (3) by plastic protective sleeve (7).