CN204318703U - A kind of miniature side luminescence imaging probe - Google Patents

Abstract

A miniature side luminescence imaging probe, the optical fiber lens (2) that it comprises single-mode fiber (1) and is attached thereto, namely base is angled for reflection end face (2-1) the i.e. hypotenuse of described optical fiber lens (2) and outgoing end face (2-2).This utility model optimizes the index distribution of lens, can obtain best beam quality; Meanwhile, simplify device and form, use the processing step simplified most to be met the optical quality of requirement.

Description

A kind of miniature side luminescence imaging probe

Technical field

This utility model relates to a kind of design, making of lateral direction light emission imaging probe, is applicable to the field such as imaging and illumination of narrow tract, is particularly useful for the imaging of OCT for the tract such as blood vessel, esophagus.

Background technology

At present, the technological means such as x-ray, excusing from death has been widely used in the Diagnosis and Treat of various disease, but all exists the damage of biological tissue and the shortcoming such as resolution is not high.OCT technology uses optical detection, have harmless, resolution is high, in the unique advantage of body biopsy, can be widely used in fields such as ophthalmology.But for the restriction of the field such as blood vessel, esophagus due to detection means, and do not applied on a large scale.

At present for the OCT probe of blood vessel detection, due to complex process, cost intensive, and there is some problems in beam quality, and such as, the interference of echo, hot spot are ellipticity etc.

Summary of the invention

The purpose of this utility model is the complex process for probe existence at present, and the problem that manufacture difficulty is large, proposes the image side faces luminescent probe that a kind of structure is simple, simple for production.

The technical solution of the utility model is:

A kind of miniature side luminescence imaging probe, the optical fiber lens that it comprises single-mode fiber and is attached thereto, the reflection end face of described optical fiber lens and hypotenuse and outgoing end face and base angled.

The diameter of optical fiber lens of the present utility model is 50 microns to 10 millimeters.

Gummed or welding between single-mode fiber of the present utility model and optical fiber lens.

Angle theta between the reflection end face of optical fiber lens of the present utility model and outgoing end face is less than 85 degree.

The reflection end face coating of optical fiber lens of the present utility model.

The base of optical fiber lens of the present utility model can either keep circular arc as probe outgoing end face, also outgoing end face can be thrown flat.

The beneficial effects of the utility model:

This utility model optimizes the index distribution of lens, can obtain best beam quality.

This utility model simplifies device and forms, and uses the processing step simplified most to be met the optical quality of requirement.

Accompanying drawing explanation

Fig. 1 is one of structural representation of the present utility model.

Fig. 2 is the right view of Fig. 1, i.e. reflective end structure schematic diagram.

Fig. 3 is structural representation two (outgoing end face is thrown flat) of the present utility model.

Fig. 4 is the right view of Fig. 3, and namely outgoing end face throws flat reflective end structure schematic diagram.

Wherein: dotted line represents ray trajectory.

Detailed description of the invention

Below in conjunction with drawings and Examples, this utility model is further described.

As shown in Figure 1, a kind of miniature side luminescence imaging is popped one's head in, the optical fiber lens 2 that it comprises single-mode fiber 1 and is attached thereto, gummed or welding between single-mode fiber 1 and optical fiber lens 2; The reflection end face 2-1 of described optical fiber lens 2 and hypotenuse and outgoing end face 2-2 and base angled.

The diameter of optical fiber lens 2 of the present utility model is 50 microns to 10 millimeters.

In order to realize the lateral direction light emission of optical fiber lens inclined plane, the one in following two kinds of modes or two kinds can be adopted to use, with reinforced effects simultaneously:

When 1, utilizing total internal reflection principle to realize the lateral direction light emission of optical fiber lens inclined plane: the angle theta between the reflection end face 2-1 of optical fiber lens 2 and outgoing end face 2-2 is less than 85 degree.

When 2, utilizing inclined plane plated film to realize the lateral direction light emission of optical fiber lens inclined plane: the reflection end face coating of optical fiber lens 2, reflection can be strengthened to specific band.

The base of optical fiber lens 2 of the present utility model can either keep circular arc as probe outgoing end face 2-2, also outgoing end face 2-2 can be thrown flat.As shown in Figure 3, for outgoing end face is thrown the sonde configuration schematic diagram after putting down.

In optical fiber lens 2 of the present utility model, the refractive index of each longitudinal terminal surface radially distributes parabolically shape, meets following formula:

$n^2\left(r\right)=\left\{\begin{array}{cc}{n}_1^2[1-2\mathrm{\&Delta;}{\left(\frac{r}{a}\right)}^2]& r<a\\ n_2^2& r=a\end{array}\right.;$

$\mathrm{\&Delta;}=\frac{n_1^2-n_2^2}{2n_1^2};$

Wherein, n ₁represent as r=0, the refractive index in the center of circle of any longitudinal terminal surface of optical fiber lens; n ₂represent as r=a, the refractive index of the maximum radius point of the longitudinal maximum radius end face of optical fiber lens; R represents the radius of each longitudinal terminal surface of optical fiber lens; A represents the largest end face radius of optical fiber lens; N (r) represents that first footpath of the arbitrary end face of optical fiber lens is the refractive index of the point of r, and Δ is refractive index contrast.

During concrete enforcement:

A lateral direction light emission probe, is made up of single-mode fiber 1 and optical fiber lens 2, and single-mode fiber 1 and optical fiber lens 2 junction divest coat, and after cutting, the length of residue removal coat is approximately 1 ~ 3mm, and diameter is 125 microns.

According to probe parameter demand, conventional method is selected to calculate the refractive index n in the center of circle of any end face of optical fiber lens ₁=1.4606, the refractive index n of the maximum radius point of optical fiber lens maximum radius end face ₂=1.4468, obtaining refractive index contrast Δ is 0.0094, and the numerical aperture choosing optical fiber lens is 0.2, and diameter is 250 microns, obtains index distribution and is:

$n^2\left(r\right)=\left\{\begin{array}{cc}{1.4606}^2[1-2*0.0094{\left(\frac{r}{125}\right)}^2]& r<125\\ {1.4468}^2& r=125\end{array}\right.$

$\mathrm{\&Delta;}=\frac{n_1^2-n_2^2}{2n_1^2}=0.0094;$

Optical fiber lens one end is cleaned, cut after welded together by the mode of hot melt with optical fiber, keep optical fiber 1 and optical fiber lens 2 axle center to align during welding.

By lens clean cut, retaining the length of lens be welded on optical fiber is 2000 microns.

The angle of reflection from lens end face and outgoing end face is ground to form 45 degree.

Electric discharge chamfering is carried out to lensed endface.

At the inclined-plane metalling aluminum of 45 degree, lens, form reflecting surface, obtain miniature side luminescence imaging probe.

This utility model does not relate to the part prior art that maybe can adopt all same as the prior art and is realized.

Claims (6)

1. a miniature side luminescence imaging probe, it is characterized in that the optical fiber lens (2) that it comprises single-mode fiber (1) and is attached thereto, namely base is angled for reflection end face (2-1) the i.e. hypotenuse of described optical fiber lens (2) and outgoing end face (2-2).

2. miniature side according to claim 1 luminescence imaging probe, is characterized in that the diameter of described optical fiber lens (2) is 50 microns to 10 millimeters.

3. miniature side according to claim 1 luminescence imaging probe, is characterized in that gummed or welding between single-mode fiber (1) and optical fiber lens (2).

4. miniature side according to claim 1 luminescence imaging probe, is characterized in that the angle theta between the reflection end face (2-1) of described optical fiber lens (2) and outgoing end face (2-2) is less than 85 degree.

5. miniature side according to claim 1 luminescence imaging probe, is characterized in that the reflection end face coating of optical fiber lens (2).

6. miniature side according to claim 1 luminescence imaging probe, is characterized in that the base of optical fiber lens (2) can either keep circular arc as probe outgoing end face (2-2), also outgoing end face (2-2) can be thrown flat.