阅读说明：本技术 一种单光纤的漏光多点照明设计方法 (Light leakage multi-point illumination design method for single optical fiber ) 是由 赵静 张健 魏峘 覃翠 余辉龙 何睿清 姜男澜 吴利婷 于 2021-07-19 设计创作，主要内容包括：本发明涉及一种单光纤的漏光多点照明设计方法,在单根粗径光纤路径中形成破裂开口,破坏光信号在纤芯内的全反射条件,部分光将从破裂的开口处漏出,形成漏光的照明点,其余光仍在光纤内部沿纤芯继续进行全反射传输,直至到达下一漏光的开口处,依次类推,通过这种方式在光纤路径上设计多个漏光的照明点,则能够在一根光纤上得到多点照明。本发明可在单光纤中即实现复杂图案的装饰功能,节约了光纤材料成本,本发明的技术方案可应用于各类大范围环境下的照明、装饰中。(The invention relates to a light leakage multipoint illumination design method for a single optical fiber, wherein a rupture opening is formed in a path of a single large-diameter optical fiber, the total reflection condition of an optical signal in a fiber core is destroyed, part of light leaks out from the rupture opening to form an illumination point of light leakage, the rest of light is still transmitted in the optical fiber along the fiber core in a total reflection manner until reaching the opening of the next light leakage, and the like. The invention can realize the decoration function of complex patterns in a single optical fiber, saves the cost of optical fiber materials, and can be applied to illumination and decoration in various large-range environments.)

1. A light leakage multi-point illumination design method of a single optical fiber is characterized in that: a broken opening is formed in a single large-diameter optical fiber path, the total reflection condition of an optical signal in a fiber core is destroyed, part of light leaks from the broken opening to form a light-leaking illumination point, the rest of light is still transmitted in the optical fiber along the fiber core in a total reflection mode until the light reaches the opening of the next light-leaking mode, and the like, and a plurality of light-leaking illumination points are designed on the optical fiber path in the mode, so that multi-point illumination can be obtained on one optical fiber.

2. The design method of light leakage multi-spot illumination with single optical fiber as claimed in claim 1, wherein: if only an independent light source is arranged at the entrance of the optical fiber, the light power is larger at the position closer to the light source and smaller at the position farther away from the light source along the transmission direction of the optical fiber passing through the path, and the size and the proportion of the light power of each illumination point can be controlled by reasonably setting the reflectivity and the transmissivity of the incident surface at each fracture opening.

3. The design method of light leakage multi-spot illumination with single optical fiber as claimed in claim 1, wherein: and for the illumination condition of large range and ultra-multiple points, an optical fiber repeater is arranged at the middle section of the optical fiber according to the condition so as to improve the light power of the subsequent illumination point.

4. The design method of light leakage multi-spot illumination with single optical fiber as claimed in claim 1, wherein: and the light incident angle of the light which enters the optical fiber by secondary coupling meets the total reflection condition through anti-reflection design at the light leakage position of the fiber core.

5. The design method of light leakage multi-spot illumination with single optical fiber as claimed in claim 4, wherein: if the light leakage position of the fiber core is not processed, the refractive index of the opening is equal to the refractive index of the environment medium; if the light leakage position of the fiber core is filled with the specific transparent substance, the refractive index of the opening is equal to that of the specific transparent substance.

6. The design method of light leakage multi-spot illumination with single optical fiber as claimed in claim 1, wherein: a specially designed lampshade is arranged at each light leakage lighting point in a matching manner, so that a decorative effect with complex patterns can be obtained.

7. The design method of light leakage multi-spot illumination with single optical fiber as claimed in claim 1, wherein: wherein the broken opening is of rectangular opening design.

8. The design method of light leakage multi-spot illumination with single optical fiber as claimed in claim 1, wherein: wherein the broken opening is of triangular opening design.

Technical Field

The invention relates to the field of optical fiber illumination and optical system design, in particular to a light leakage multipoint illumination design method of a single optical fiber.

Background

At present, a plurality of optical fibers are adopted for optical fiber illumination application to realize illumination, decoration and the like, illumination in different environments or decoration design in different scenes are mainly realized through the design of a plurality of optical fiber output heads, and each optical fiber output head is equivalent to one pixel point. The design of complex patterns sometimes requires the use of large numbers of optical fibers, which is wasteful for reasonable utilization of resources.

Disclosure of Invention

The invention aims to provide a single-optical-fiber light-leakage multi-point illumination design method, which realizes multi-point illumination by opening a hole in the middle section of the fiber diameter of a large-diameter optical fiber and realizes the decoration function of complex patterns by matching with the design of an optical system of an opening hole.

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

a single-optical-fiber light-leakage multi-point illumination design method is characterized in that a broken opening is formed in a single large-diameter optical fiber path, the total reflection condition of an optical signal in a fiber core is damaged, part of light leaks out from the broken opening to form a light-leakage illumination point, the rest of light is still transmitted in the optical fiber along the fiber core in a total reflection mode until reaching the next light-leakage opening, and the like.

Furthermore, if only one independent light source is arranged at the entrance of the optical fiber, the light power is larger at the position closer to the light source and smaller at the position farther away from the light source along the transmission direction of the optical fiber passing through the path, and the size and the proportion of the light power of each illumination point can be controlled by reasonably setting the reflectivity and the transmissivity of the incident surface at each fracture opening.

Furthermore, under the condition of large-range and ultra-multipoint illumination, an optical fiber repeater is arranged at the middle section of the optical fiber according to the condition so as to improve the light power of the subsequent illumination point.

Furthermore, the light leakage position of the fiber core is subjected to anti-reflection design, so that the incident angle of the light which enters the optical fiber in the secondary coupling mode meets the total reflection condition, and the refractive index at the opening is equal to the refractive index of an environment medium.

Preferably, if the light leakage position of the fiber core is filled with the specific transparent substance, the refractive index at the opening is equal to the refractive index of the specific transparent substance.

Preferably, a specially designed lamp cover is fitted to each of the light leakage illumination points, thereby obtaining a decorative effect with a complicated pattern.

Wherein the broken opening is of rectangular opening design.

Wherein the broken opening is of triangular opening design.

Compared with the prior art, the invention has the beneficial effects that:

the invention designs a single optical fiber lighting device, which only adopts one large-diameter optical fiber, can obtain multi-point lighting on one optical fiber by utilizing the fracture opening to carry out active light leakage design in the middle section of the optical fiber diameter, can realize the decoration function of complex patterns by matching with the optical system design at the opening, does not need to use the point light source common design of a plurality of optical fibers, saves the material cost of the optical fiber, and simplifies the optical fiber arrangement design. The technical scheme of the invention can be applied to illumination and decoration in various large-range environments, such as underwater illumination, architectural decoration and the like.

Drawings

FIG. 1: the invention forms a schematic diagram of the multipoint illumination of a single optical fiber.

FIG. 2: core opening design scheme one (core openings are rectangular).

FIG. 3: core opening design scheme two (core openings are triangular).

Detailed Description

The above-mentioned contents of the present invention are further described in detail by way of examples below, but it should not be understood that the scope of the above-mentioned subject matter of the present invention is limited to the following examples, and any technique realized based on the above-mentioned contents of the present invention falls within the scope of the present invention.

A single-optical-fiber light-leakage multi-point illumination design method is characterized in that a broken opening is formed in a single large-diameter optical fiber path, the total reflection condition of an optical signal in a fiber core is damaged, part of light leaks out from the broken opening to form a light-leakage illumination point, the rest of light is still transmitted in the optical fiber along the fiber core in a total reflection mode until reaching the next light-leakage opening, and the like.

If only an independent light source is arranged at the entrance of the optical fiber, the light power is larger at the position closer to the light source and smaller at the position farther away from the light source along the transmission direction of the optical fiber passing through the path, and the size and the proportion of the light power of each illumination point can be controlled by reasonably setting the reflectivity and the transmissivity of the incident surface at each fracture opening.

And for the illumination condition of large range and ultra-multiple points, an optical fiber repeater is arranged at the middle section of the optical fiber according to the condition so as to improve the light power of the subsequent illumination point.

The light leakage position of the fiber core is subjected to anti-reflection design, so that the incident angle of the light entering the optical fiber by secondary coupling meets the total reflection condition, and the refractive index at the opening is equal to that of the environment medium. If the light leakage position of the fiber core is filled with the specific transparent substance, the refractive index of the opening is equal to that of the specific transparent substance.

And a specially designed lampshade can be matched and installed at each light leakage lighting point, so that a decorative effect with complex patterns is obtained.

The principle of the invention is that the optical fiber light transmission utilizes the design of a specific fiber core and a cladding to realize the total reflection of an optical signal in the fiber core, the optical signal is transmitted from a fiber head to a fiber tail almost without loss, when a crack occurs at a certain position in an optical fiber path, the total reflection condition is destroyed, and partial light leaks from the position to form light leakage. If the active light leakage design is performed by using such a break, multi-point illumination can be obtained on one optical fiber, as shown in fig. 1.

Assuming a core refractive index of n₁Refractive index n at the opening and surrounding₀Angle of incidence at the entrance of the optical fiber is θ₁Angle of refraction into the fiber is θ₂。

In the first case, a rectangular opening design is made in the middle of the fiber, as shown in FIG. 2, M₁Is an optical fiber emergent surface at the opening, M₂Is the incident surface of the optical fiber at the opening, the light beam in the optical fiber takes theta₂From angle of incidence of M₁Injection at θ₁At an angle of incidence of M₂The facet entry fiber continues to transmit while some of the light is reflected out, as shown by the dashed line in fig. 2. At the opening incident surface M₂The light splitting design of less reflection and multiple transmission is carried out, so that a small amount of light is emitted from the opening to form an illumination point at the position, a large amount of light can still enter the optical fiber to be transmitted in a total reflection way along the fiber core and reach the next opening, the same light leakage design is the same, the analogy is repeated, the multi-point illumination is realized on one optical fiber, if an independent light source is arranged at the entrance of the optical fiber, the transmission direction of the optical fiber along the path is carried out, the light power is larger when the optical fiber is closer to the light source, the light power is smaller when the optical fiber is farther away from the light source, and the opening incidence plane M in the figure 2 is reasonably arranged₂The reflectivity and the transmissivity of the light source can control the magnitude and the proportion of the light power of each illumination point.

Assuming incident light power of P₀，M₂The reflection and transmission ratio on the surface is 1:99, and the light power of emergent light at the first opening from the incident end surface of the optical fiber is 0.01P₀The power of the emergent light at the kth opening from the incident end face of the optical fiber is 0.01 x 0.99^{k- 1}P₀. When k is 36, the optical power at the entrance face of the aperture will drop to 0.99³⁵P₀＝0.7P₀When k is 100, the optical power at the entrance face of the opening will drop to 0.99⁹⁹P₀＝0.37P₀For large area, ultra-multi-point (e.g. illumination point)>100) Under the illumination condition, an optical fiber repeater can be arranged at the middle section of the optical fiber according to the condition, so that the light power of a subsequent illumination point is improved.

In the second case, a triangular opening is designed in the middle of the optical fiber, as shown in FIG. 3, the incident angle from the outside into the optical fiber is represented as θ₁The internal refraction angle of the optical fiber is theta₂Open exit surface M₁The included angle between the notch and the fiber core is theta₃Open incident surface M₂The included angle between the notch and the fiber core is theta₄. Need to be satisfied in the designA certain condition, assuming that the light irradiates the opening M₁The angle of incidence on the exit face is θ₅Angle of refraction is θ₆，M₁The light beam is totally transmitted out through the anti-reflection design and irradiates M₂The angle of incidence on the surface is denoted as θ₇Angle of refraction is denoted as θ₈The incident angle of the light entering the optical fiber by secondary coupling is required to satisfy the total reflection condition, i.e. the angle of the incident light irradiating the inner wall of the fiber core is still theta₂As shown in fig. 3. Core refractive index n₁Refractive index n at the opening₀，n₀N depending on the environment in which the open fiber is used, equal to the refractive index of the material in the environment, or filled with a specific transparent material at the opening₀Equal to the refractive index of the particular material.

The following relationship holds according to the law of refraction and trigonometric analysis:

n₀sinθ₁＝n₁sinθ₂ (1)

n₀ sinθ₆＝n₁ sinθ₅ (2)

n₀ sinθ₇＝n₁ sinθ₈ (3)

θ₂+180°-θ₄+90°-θ₈＝180°→θ₄+θ₈-θ₂＝90° (4)

θ₂+θ₃+90°-θ₅＝180°→θ₂+θ₃-θ₅＝90° (5)

90°+(180°-θ₃-θ₄)+θ₆+(90°-θ₇)＝180°→θ₃+θ₄+θ₇-θ₆＝180° (6)

here, n is determined in advance₀、n₁、θ₁And theta₃Thereafter, other parameters can be calculated from the above six relational expressions, and θ is obtained from the expression (1)₂From the formula (5), θ₅From the formula (2), θ₆Solving equations (3), (4) and (6) can obtain theta₄、θ₇、θ₈。

The design of rectangle opening is simple and convenient, but light outgoing direction is unique, is the oblique direction of penetrating moreover usually, and triangle-shaped opening design operation shows slightly complicacy, needs satisfy suitable angle condition, but the accessible is proper design, makes light positive outgoing upwards, promotes the illumination decorative effect.

Each opening on the optical fiber path is equivalent to providing a point light source, if a lampshade with special design is matched with each point, the decorative effect with complex patterns can be obtained, the point light sources of a plurality of optical fibers are not required to be designed together, the cost of optical fiber materials is saved, and the optical fiber arrangement design is simplified.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention in any way, and any person skilled in the art can make any simple modification, equivalent replacement, and improvement on the above embodiment without departing from the technical spirit of the present invention, and still fall within the protection scope of the technical solution of the present invention.