CN115421236A - Light source spectroscopic system and lighting equipment - Google Patents

Abstract

The invention discloses a light source spectroscopic system and lighting equipment, and relates to the technical field of optics. The light source spectroscopic system includes a resin layer and an optical thinning medium. The resin layer includes a first side, a second side opposite to the first side, and a peripheral side between the first side and the second side. The refractive index n _of the resin layer is greater than Refractive index n ₂ of the optically thinning medium, the optically thinning medium is respectively attached to the first side, the second side and the peripheral side; the first side is covered by the light source, and the light emitted by the light source can be injected into the resin layer and can enter the resin layer total internal reflection; the second side is also provided with microstructures, and the incident angle of the light rays to the sidewalls forming the microstructures is less than

In order to enable light to exit into the optically thinning medium through the microstructure. The invention solves the technical problems of difficult design and high manufacturing cost in the prior art of modulating light by diffractive optical devices.

Description

Light source spectroscopic system and lighting equipment

technical field

The invention relates to the technical field of optics, in particular to a light source spectroscopic system and lighting equipment.

Background technique

With the current laser light source and LED light source being used more and more, modulating the light emission of the light source can make it have a more precise application. For example, changing a single light source into multiple light sources, turning a single light source into ring light, etc. have good application scenarios for art lighting, backlight light source, and laser radar. At present, the method of light modulation is basically to use diffractive optical device (DOE) to modulate, but the design of this scheme is difficult, the production cost is high, and it is not suitable for many scenarios.

Contents of the invention

In view of this, the present invention provides a light source spectroscopic system and lighting equipment, which are used to solve the technical problems of difficult design and high manufacturing cost in the prior art of using diffractive optical devices to modulate light.

In order to solve the above-mentioned technical problems, the technical solution one that the present invention adopts is:

A light source spectroscopic system, the light source spectroscopic system includes a resin layer and an optical thinning medium, the resin layer includes a first side, a second side opposite to the first side, and a On the peripheral side between the two sides, the refractive index n ₁ of the resin layer is greater than the refractive index n ₂ of the optical thinning medium, and the optical thinning medium is respectively attached to the first side, the second side and the said peripheral side;

且α＝β-θ，以及所述光线经由所述凹槽壁面反射在所述第一侧、所述周侧和所述第二侧时的各入射角不小于

以使所述光源发出的光线能够在所述树脂层内全反射；The first side is covered with a light source, the light emitted by the light source can be injected into the resin layer, the second side is provided with a groove corresponding to the position of the light source, and the wall surface of the groove is in contact with the first The acute angle between the planes where the two sides are located is α, the acute angle between the incident angle of the light and the normal direction of the plane where the second side is located is θ, and the incident angle β of the light to the wall surface of the groove not less than

And α=β-θ, and the incidence angles of the light rays reflected on the first side, the peripheral side and the second side through the groove wall surface are not less than

so that the light emitted by the light source can be totally reflected in the resin layer;

以使光线能够经由所述微结构出射至所述光疏介质内。A microstructure is also provided on the second side, and the incident angle of the light when incident on the sidewall forming the microstructure is smaller than

In order to enable the light to exit into the optical thinning medium through the microstructure.

In some embodiments of the light source spectroscopic system, the orthographic projection area of the groove facing the second side is larger than half of the orthographic projection area of the light source facing the second side .

In some embodiments of the light source spectroscopic system, the groove is a tapered groove, and the acute angle between the inclined wall of the tapered groove and the plane where the second side is located is α.

In some embodiments of the light source spectroscopic system, the number of the microstructures is multiple, and each of the microstructures is arranged around the groove and arranged in a circular, elliptical or polygonal shape. on the second side.

In some embodiments of the light source spectroscopic system, there are multiple microstructures, and each of the microstructures is randomly distributed on the second side.

In some embodiments of the light source spectroscopic system, the microstructures are grooves or protrusions.

In some embodiments of the light source spectroscopic system, the shape of the orthographic projection of the groove or the protrusion towards the plane where the first side is located is a circle, an ellipse or a polygon.

In some embodiments of the light source spectroscopic system, the material of the resin layer is one of polyurethane, epoxy resin, and acrylic resin.

In some embodiments of the light source spectroscopic system, the haze of the resin layer is lower than 10%.

In order to solve the above-mentioned technical problems, the technical scheme two that the present invention adopts is:

A lighting device includes a light source and the light source light splitting system described in the above embodiments.

Implementing the embodiment of the present invention will at least have the following beneficial effects:

The above-mentioned light source spectroscopic system is applied to lighting equipment, which can make itself and the lighting equipment have the technical effect of simple design and low production cost. Specifically, the light source spectroscopic system includes a resin layer and an optical thinning medium. , and adjust the incident angle of light from the light source, so that the light entering the resin layer can be totally reflected in the resin layer, so that the light can only exit into the optically sparse medium through the microstructure on the second side. The overall light source spectroscopic system The structure is simple, the cost is low, and it is applicable to any scene and any light wave band, thereby solving the technical problems of difficult design and high manufacturing cost in the prior art of using diffractive optical devices to modulate light.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic structural diagram of a light source modulation system in an embodiment;

Fig. 2 is a top view when the light source is connected to the first side of the light source modulation system in one embodiment;

Fig. 3 is a sectional view of part A-A in Fig. 2;

FIG. 4 is a schematic diagram of an enlarged structure of part B in FIG. 3 .

Among them: 1. resin layer; 11. first side; 12. second side; 13. groove; 14. microstructure; 15. peripheral side; 2. light source.

Detailed ways

In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many other different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of illustration only.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

At present, the method of light modulation is basically to use diffractive optical device (DOE) to modulate, but the design of this scheme is difficult, the production cost is high, and it is not suitable for many scenarios.

且α＝β-θ，以及光线经由凹槽13壁面反射在第一侧11、周侧15和第二侧12时的各入射角不小于

以使光源2发出的光线能够在树脂层1内全反射。第二侧12上还设有微结构14，光线射向形成微结构14的侧壁时的入射角小于

以使光线能够经由微结构14出射至光疏介质内。As shown in Figures 1-4, in an embodiment of a light source spectroscopic system, the light source spectroscopic system includes a resin layer 1 and an optical thinning medium, and the resin layer 1 includes a first side 11 and a second side 12 opposite to the first side 11 and the peripheral side 15 between the first side 11 and the second side 12, the refractive index n ₁ of the resin layer 1 is greater than the refractive index n ₂ of the optically thinning medium, and the optically thinning medium is attached to the first side 11 and the second side respectively. side 12 and peripheral side 15. The first side 11 covers the light source 2, the light emitted by the light source 2 can be injected into the resin layer 1, the second side 12 is provided with a groove 13 corresponding to the position of the light source 2, the wall surface of the groove 13 and the plane where the second side 12 is located The acute angle between them is α, the acute angle between the incident angle of the light and the normal direction of the plane where the second side 12 is located is θ, and the incident angle β of the light to the wall of the groove 13 is not less than

And α=β-θ, and the incident angles of the light reflected on the first side 11, the peripheral side 15 and the second side 12 through the wall surface of the groove 13 are not less than

The light emitted by the light source 2 can be totally reflected in the resin layer 1 . Microstructures 14 are also provided on the second side 12, and the incident angle of the light rays to the sidewalls forming the microstructures 14 is less than

In order to enable light to exit into the optically thinning medium through the microstructure 14 .

In this embodiment, the light source spectroscopic system includes a resin layer 1 and an optically thinning medium, through the cooperation of the resin layer 1 and the optically thinning medium, and adjusting the incident angle of the light from the light source 2, so that the light entering the resin layer 1 can pass through the resin layer 1 Total reflection is carried out inside, so that the light can only exit into the light-thinning medium through the microstructure 14 on the second side 12, the construction of the overall light source spectroscopic system is simple, the cost is low, and it can be applied to any scene and any light band, thus solving the problem of In the prior art, the way of modulating light by diffractive optical devices is difficult in design and high in manufacturing cost.

关于第一点，树脂层1顾名思义其采用树脂材料制成，为常见材料，价格低廉，能够降低整体光源分光系统成本，并且常见树脂材料的折射率在1.5左右，光疏介质可为空气，空气的折射率为1，或为其他折射率低于1.5的光疏介质包裹贴附在树脂层1上也可，当光疏介质采用空气时，可以免除制作光疏介质的费用，而空气充盈在树脂层1，也是呈包裹或贴附的效果的。关于第二点，本实施例通过设置凹槽13壁面的倾斜角度实现，使得光源2发出的光线能够在树脂层1内全反射。最后为使光线能够从树脂层1中出射而出，通过设置微结构14破坏了全反射条件，从而使得光线能够从微结构14出射而出，以此能够达到控制光线的出射位置，以及形成图案形状等，如将单一微结构14设置成圆形、矩形等形成，能够在墙壁等面上呈现对应的形状。It should be noted that the conditions for constructing total reflection are: 1. Light enters an optically sparse medium from an optically denser medium; 2. The incident angle is greater than the critical angle

Regarding the first point, the resin layer 1 is made of resin material as its name suggests, which is a common material with low price and can reduce the cost of the overall light source spectroscopic system, and the refractive index of common resin materials is about 1.5, and the optically thinning medium can be air, air The refractive index is 1, or other optically thinning medium with a refractive index lower than 1.5 can be wrapped and attached to the resin layer 1. When the optically thinning medium is air, the cost of making the optically thinning medium can be exempted, and the air is filled in The resin layer 1 also has the effect of wrapping or attaching. With regard to the second point, this embodiment achieves by setting the inclination angle of the wall surface of the groove 13 so that the light emitted by the light source 2 can be totally reflected in the resin layer 1 . Finally, in order to enable the light to exit from the resin layer 1, the total reflection condition is destroyed by setting the microstructure 14, so that the light can exit from the microstructure 14, so as to control the exit position of the light and form a pattern Shape, etc., such as setting the single microstructure 14 in a circle, rectangle, etc., can present a corresponding shape on a wall or the like.

In addition, the light source 2 can be an LED lamp, and the wavelength range of the light source 2 emitted by the LED lamp is about 300nm-1100nm. When modulated by the diffractive optical device DOE, the unit size of the diffractive optical device DOE must also be within the corresponding wavelength range. This greatly increases the difficulty and cost of preparation. The use of resin materials is not sensitive to wavelength, and the processing size is on the order of 10μm-100μm, the processing difficulty is small, and it can be used in the whole band of 300nm-1100nm.

In addition, the incident angle of light reflected on the first side 11 through the wall surface of the groove 13 is γ, and during total reflection,

In an embodiment of the light source light splitting system, the orthographic projection area of the groove 13 facing the second side 12 is larger than half of the orthographic projection area of the light source 2 facing the second side 12 . In this embodiment, if the orthographic projection area of the groove 13 is too small, part of the light rays will not be completely incident on the wall surface of the groove 13, and more than half of the size can prevent the incident angle of the light rays from falling on the second side 12 from being less than full. Critical angle for reflective conditions.

In an embodiment of the light source light splitting system, when the groove 13 is a tapered groove, the acute angle between the inclined wall of the tapered groove and the plane where the second side 12 is located is α.

In this embodiment, specifically, the tapered groove can be pyramidal or conical, that is, the orthographic projection of the tapered groove toward the plane where the first side 11 is located can be in the shape of a circle, square, triangle, hexagon, etc., wherein It is preferably conical to reduce the interference of edges and corners.

In an embodiment of a light source spectroscopic system, the number of microstructures 14 is multiple, each microstructure 14 is arranged around the groove 13, and is arranged around the second side 12 to form a circular, elliptical or polygonal shape. .

In an embodiment of the light source spectroscopic system, there are multiple microstructures 14 , and the microstructures 14 are randomly distributed on the second side 12 .

In combination with the above two embodiments, in both embodiments, there are multiple microstructures 14, the difference is that the microstructures 14 are arranged in an orderly manner in one embodiment, and the microstructures 14 in the other embodiment Arranged in a disordered manner, that is, the arrangement of the microstructures 14 is arbitrary. It can form an ordered matrix, a ring shape, etc., and can also be randomly distributed. The microstructures 14 can be adjusted according to actual design needs. A reasonable layout is all that is needed, so that it can adapt and form a variety of artistic lighting designs, and it also has the ability to transform and modulate the point light source 2 in various forms, which improves the utilization rate of the light source 2 .

In an embodiment of the light source spectroscopic system, the microstructure 14 is a groove or a protrusion. When the microstructure 14 is a protrusion, the protrusion is integrally formed on the second side 12 .

In combination with the previous embodiments, it can be understood that the function of the microstructure 14 is to break the total reflection condition of the second side 12, so that when the light is irradiated on the microstructure 14, it can exit the resin layer 1 through the microstructure 14, specifically, In this embodiment, two structural forms of the microstructure 14 are given, both of which can achieve the effect of destroying the total reflection condition of the second side 12 , and the two structures are simple and easy to design and manufacture.

The microstructure 14 can be obtained through a variety of surface treatment processes, such as surface frosting, laser processing, etc., and the microstructure 14 can also be obtained by making a template and then embossing it on the template. The material of the template can be Teflon , stainless steel, AAO, etc.

In an embodiment of the light source spectroscopic system, the shape of the orthographic projection of the groove or the protrusion towards the plane where the first side 11 is located is a circle, an ellipse or a polygon.

In combination with the previous embodiments, it can be understood that the shape and structure of the microstructure 14 can cause the emitted light to form different patterns, especially when there is only one or a few microstructures 14, this effect of forming different patterns It can be enlarged to provide a variety of design solutions for users to choose according to their own needs or preferences.

In addition, the shape and structure of the peripheral side 15 is not limited, as long as it can form a total reflection condition, it can be circular, arched or the like.

In an embodiment of the light source spectroscopic system, the material of the resin layer 1 is one of polyurethane, epoxy resin and acrylic resin. The haze of the resin layer 1 is less than 10%.

The present invention also relates to a lighting device, including the light source 2 and the light source light splitting system in the above embodiment.

By applying the light source light splitting system in the above embodiments to the lighting equipment, the lighting equipment has the technical effects of simple design and low manufacturing cost.

The technical features of the above embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be It is considered to be within the range described in this specification.

The above examples only express several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but should not be construed as limiting the scope of the patent application. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (10)

1. The utility model provides a light source beam splitting system, its characterized in that, light source beam splitting system includes resin layer and optically sparse medium, the resin layer include first side, with second side that the first side carried on the back mutually and be located first side with week side between the second side, the refracting index of resin layern ₁ Is larger than the refractive index n of the light-thinning medium ₂ The light-thinning medium is respectively attached to the first side, the second side and the peripheral side;

the first side covers the light source, light rays emitted by the light source can be emitted into the resin layer, a groove is formed in the position, corresponding to the light source, of the second side, an acute angle between the wall surface of the groove and the plane where the second side is located is alpha, an acute angle between the incident angle of the light rays and the normal direction of the plane where the second side is located is theta, and the incident angle beta of the light rays emitted to the wall surface of the groove is not smaller than that of the groove

And α = β - θ, and each incident angle of the light ray when reflected on the first side, the peripheral side, and the second side via the wall surface of the groove is not less than

So that the light emitted by the light source can be totally reflected in the resin layer;

the second side is also provided with a microstructure, and the incident angle of the light rays emitted to the side wall forming the microstructure is smaller than that of the light rays

So that light can be emitted into the light-thinning medium through the microstructures.

2. The light source splitting system of claim 1, wherein an amount of an orthographic area of the recess facing a plane in which the second side is located is greater than half an amount of an orthographic area of the light source facing the plane in which the second side is located.

3. The light source splitting system of claim 1, wherein the recess is a tapered slot, and an acute angle α is an acute angle between the inclined wall of the tapered slot and a plane in which the second side lies.

4. The light source splitting system of claim 1, wherein the number of the microstructures is plural, each of the microstructures is disposed around the groove and arranged on the second side in a shape of a circle, an ellipse, or a polygon.

5. The light source splitting system of claim 1, wherein the number of the microstructures is plural, and each of the microstructures is randomly distributed on the second side.

6. The light source beam splitting system of claim 4 or 5, wherein the microstructure is a groove or a protrusion, and when the microstructure is a protrusion, the protrusion is integrally formed on the second side.

7. The light source beam splitting system of claim 6, wherein the shape of the orthographic projection of the groove or the protrusion on the plane where the first side is located is circular, elliptical or polygonal.

8. The light source spectroscopy system of claim 1, wherein the resin layer is made of one of polyurethane, epoxy, and acrylic.

9. The light source splitting system of claim 1 or 8, wherein the haze of the resin layer is less than 10%.

10. An illumination device characterized by comprising a light source and the light source splitting system according to any one of claims 1 to 9.

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