CN217441548U - Optical device and lighting device - Google Patents

Abstract

The utility model is suitable for an illumination technology field provides an optical device and lighting device. The optical device comprises a lens, wherein the lens is provided with a light inlet surface and a light outlet surface, a concave-convex structure is formed on the light outlet surface, the concave-convex structure consists of grooves which are distributed at intervals and/or connected, and the curvature diameter of each groove is within the range of 0.1-100 mu m; the lens also comprises a total reflection surface connecting the light incident surface and the light emergent surface. The lighting device comprises a light source and the optical device, wherein the light source is positioned on the light incident side of the optical device. The utility model provides an optical device and lighting device can improve the availability factor of light when reducing the colour difference of light when passing through lens.

Description

Optical device and lighting device

Technical Field

The utility model belongs to the technical field of the illumination, especially, relate to an optical device and lighting device.

Background

A Light Emitting Diode (LED) is a photoelectric element capable of converting electric energy into Light energy. In recent years, the luminous efficiency of the LED light source is significantly improved due to the improvement of the semiconductor process technology, but the light emitted by the LED light source is similar to lambert type, that is, the light intensity is cosine distributed, and cannot be directly used for illumination, so that in some occasions, the LED light source is allowed to perform secondary optical design to change the light output of the LED, so that the LED light source can radiate light at a wider angle or irradiate light to a certain specific direction, thereby meeting the requirements of reducing light loss as much as possible, improving light utilization efficiency, reducing cost and the like when light is redistributed in the application occasions, and widening the application range of the LED light source.

Currently, the LED illumination optical design mainly redistributes light through the curved surface of the lens to achieve the required illumination angle. Generally speaking, because light is refracted at interfaces of different materials and light of different wavelengths is affected by the lens material and is emitted at different refraction angles, the light emitted through the lens will generate a certain chromatic aberration, especially at the edge of the light emitted from the lens.

In order to improve the phenomenon, some optical structures have scattering particles or concave-convex structures prepared on the light-emitting surface of the lens at present, but the scattering particles are easy to fall off, and the difference of the curved radius between the convex parts or concave parts in the concave-convex structures is large, so that the scattering angle of light passing through the scattering particles or concave-convex structures is too large or too small, and the use efficiency of the light is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an optical device and lighting device when aiming at reducing the colour difference when light passes through lens, improves the availability factor of light.

The utility model discloses a realize like this, the first aspect provides an optical device, including lens, lens have into plain noodles and play plain noodles, be formed with concave-convex structure on the play plain noodles, concave-convex structure comprises interval distribution and/or the recess that meets the distribution, the diameter of curvature of recess is in 0.1-100 mu m within range.

In an optional embodiment, the lens further includes a total reflection surface connecting the light incident surface and the light exit surface.

In an alternative embodiment, the grooves have a diameter of curvature in the range of 0.8-10 μm.

In an alternative embodiment, the optical device further comprises a housing having an interior cavity for receiving the light source and an opening in communication with the interior cavity, the lens being mounted at the opening.

In an alternative embodiment, the inner wall of the housing is formed with a reflective layer.

In an optional embodiment, at least a partial region of the light incident surface is a curved surface protruding in a direction away from the light emitting surface.

In an optional embodiment, the light incident surface includes a curved surface protruding in a direction away from the light exit surface and a cylindrical surface surrounding the curved surface, and the cylindrical surface is located on a side of the curved surface away from the light exit surface.

In an optional embodiment, the lens is a strip-shaped structure, and the light incident surface is a strip-shaped tooth surface.

In an alternative embodiment, a fresnel lens structure is formed on the light incident surface.

In a second aspect, a lighting device is provided, which includes a light source and the optical device provided in the above embodiments, where the light source is located at the light incident side of the optical device.

The utility model discloses technical effect for prior art is: the embodiment of the utility model provides an optical device and lighting device, including lens, and be formed with concave-convex structure on the play plain noodles of lens, the diameter of curvature of arbitrary recess in the concave-convex structure is in 0.1-100 mu m within range, through this setting for the difference of the curved surface radius between each convex part or the concave part in the concave-convex structure can not be too big, and then makes light through above-mentioned concave-convex structure back scattering angle can not too big or undersize, thereby makes the embodiment of the utility model provides an optical device when reducing the colour difference of light when passing through lens, effectively improves the availability factor of light. And simultaneously, on the basis of the optical device provided by the embodiment of the utility model, through the curvature radius and the concave-convex structure of each curved surface account for the proportion on lens play plain noodles in the control concave-convex structure, can realize higher light-emitting utilization ratio to and the required illumination light-emitting angle of corresponding service environment, and adopt above-mentioned mode to realize the regulation of light-emitting utilization ratio and illumination light-emitting angle, the regulative mode is simple, can effectively save design time, and can obtain different light shape achromatism lens according to the use needs, satisfy the application of different occasions.

Compared with the prior art, the utility model, have following apparent advantage, the utility model discloses based on non-imaging optics theory, utilize energy conservation law and mie scattering principle, accomplished the design of lens, carry out the solid modeling with the help of 3DCAD modeling software to calculate the structure of lens simultaneously through optical computation software. Compared with the traditional design method, the method greatly saves time and can accurately control the light.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention or the description of the prior art will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an optical device and an illumination apparatus using the optical device according to an embodiment of the present invention;

FIG. 2 is an enlarged partial schematic view at A of FIG. 1;

FIGS. 3(a) - (d) are polar intensity profiles for microparticles having diameters of 0.5, 1, 5 and 10 microns, respectively;

FIG. 4(a) is a polar intensity distribution diagram corresponding to an optical device when the smooth surface of the light-emitting surface has no concave-convex structure;

FIG. 4(b) is a polar light intensity distribution diagram of the optical device when the light emitting surface has a concave-convex structure formed by particles of 13 μm to 2.6 μm;

FIG. 4(c) is a polar light intensity distribution diagram of the optical device when the light emitting surface has a concave-convex structure formed by particles of 2.6 μm to 1.3 μm;

FIG. 5(a) is a graph of an outgoing light field profile of the corresponding optical device of FIG. 4 (a);

FIG. 5(b) is a graph of an outgoing light field profile of the corresponding optical device of FIG. 4 (b);

FIG. 5(c) is a graph of an outgoing light field profile of the corresponding optical device of FIG. 4 (c);

FIG. 6(a) is a diagram showing a light scattering intensity distribution corresponding to an optical device when a curvature diameter of a groove in a concave-convex structure is between 1 μm and 5 μm;

FIG. 6(b) is a diagram showing a light scattering intensity distribution corresponding to the optical device when the curvature diameter of the groove in the concave-convex structure is between 5 μm and 10 μm;

fig. 7 is a schematic structural diagram of an optical device and a lighting device using the optical device according to another embodiment of the present invention;

fig. 8 is a schematic structural diagram of an optical device and a lighting device using the optical device according to another embodiment of the present invention;

fig. 9 is a schematic structural diagram of an optical device and a lighting device using the optical device according to another embodiment of the present invention.

Description of the reference numerals:

100. a lens; 110. a light incident surface; 111. a curved surface; 112. a cylindrical surface; 120. a light-emitting surface; 130. a concave-convex structure; 140. a total reflection surface; 150. a Fresnel lens structure; 200. a housing; 210. an inner cavity; 220. a reflective layer; 300. a light source.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

Referring to fig. 1 and 2, in an embodiment of the present invention, an optical device is provided, which includes a lens 100, the lens 100 has an incident surface 110 and an exit surface 120, and a concave-convex structure 130 is formed on the exit surface 120. The concave-convex structure 130 is composed of grooves distributed at intervals and/or connected with each other. Specifically, the grooves are generally segment-type grooves. The curvature diameter of the groove is in the range of 0.1-100 μm.

The lens 100 in this embodiment may be a synthetic plastic member having a convex light-gathering or concave light-diffusing surface, and the concave-convex structure 130 may be a surface similar to ground glass, but the size of each concave-convex surface is controlled within a certain range to increase the brightness of the lens 100. In this embodiment, the light incident surface 110 may be a plane, an arc surface, a tooth surface, a folded surface formed by sequentially connecting a plurality of planes, or another shape, and may be flexibly set according to the use requirement, which is not limited herein.

The light extraction principle of the optical device provided by the embodiment is as follows:

in use, the light source 300 is placed on the light incident side of the lens 100. When the light source 300 is turned on, the light emitted from the light source 300 enters the lens 100 through the light incident surface 110 and then exits through the light exiting surface 120. When the light beam is emitted through the light emitting surface 120, the light beam is scattered when passing through the concave or convex portions of the concave-convex structure 130 due to the concave-convex structure 130 formed on the light emitting surface 120, and the light beam is further diffused and emitted.

The scattering behavior of the light in the above process is related to the concave-convex structure 130, and specifically, according to Mie scattering principle (Mie scattering), when the diameter d (or the size of the concave-convex surface) of the micro particle is much larger than the wavelength λ of the visible light, that is, d ≧ 10 λ, the Mie scattering state (Mie scattering register) in which the light scattering belongs to the geometric optical range, and the Mie theory gives an analytic solution of Maxwell's equation when the planar electromagnetic wave is incident on a uniform dielectric sphere with a radius d, which actually includes the leigh scattering with very small particles and the geometric optics with very large particles, and expresses the angular distribution of the scattered light in the form of a series solution, the present invention uses mathematic high-order operation software to perform Mie scattering numerical simulation, and the result is shown in fig. 3. Fig. 3(a) to (d) show the results of light scattering calculations for the fine particles having diameters of 0.5 μm, 1 μm, 5 μm and 10 μm, and it can be seen from the results that the scattering angle caused by the action of light on the fine particles when light is incident from the left side gradually increases as the particle diameter decreases.

The Bi-directional scattering function (BSDF) causes differences in light quality and design. To model these material and surface properties in detail, a library of surface materials is created, typically described in terms of their surface scattering properties, i.e., the bi-directional scattering distribution function (BSDF) of the material itself. Once the surface scattering characteristics of the material are mastered, accurate ray tracing simulation can be obtained. It is therefore contemplated that particles not of one size only may be included, but rather a collection of particles of a range of sizes. The utility model discloses supposing that a certain surface is the structure that causes by unsmooth ball shape size, unsmooth ball shape size distribution's figure presents the normality and distributes, adds the contribution of the unsmooth figure size of various differences that contain and simulates this surface scattering distribution characteristic again, with this characteristic, builds the database of a set of surface material, brings the characteristic of surface material into optical simulation software again and simulates the design.

In the prior art, light is generally scattered by coating scattering particles on the light emitting surface 120 of the lens 100 or by fabricating the concave-convex structure 130. However, the scattering particles are coated, and the coating layer may fall off after a period of time, which affects the use effect. The method of using the concave-convex structure 130 generally includes fabricating the concave-convex structure 130 on the surface of the mold, turning the concave-convex structure 130 over the light emitting surface 120 of the lens 100, and the methods of fabricating the concave-convex structure 130 on the surface of the mold include grinding, sand blasting, etching, electroplating, laser dotting and screen point superfinishing.

The concave-convex structure 130 in the present application is mainly designed to have a circular arc concave-convex structure on the light emitting surface 120, and the curvature diameter of each concave portion in the concave-convex structure 130 is controlled within a certain small range. The concave-convex structure 130 is mainly manufactured by using a sand blasting and a super-finishing method, but is not limited thereto. In one specific implementation, when the sand blasting operation is used, the sand blasting operation is performed on the light emitting surface 120 of the lens 100 by using particles between 2.5 μm and 7.5 μm; when the superfinishing mode is adopted, the spherical cutter head is used for random concave-convex depth machining.

The sandblasting processing method is as follows:

the blasting raw material is microscopically divided into size and shape, and if irregular particles are used for carrying out impact processing on the surface of the mold, the formed surface concave-convex structure 130 is an irregular structure, and the irregular concave-convex curved surfaces can be thought of as combination of curvature radii with great difference; as mentioned in the previous simulations, the light scattering effects of the curved surfaces with different curvature radii are different, and thus the light scattering of the light emitting surface 120 is the sum of the light scattering of the curved surfaces with different curvature radii, and thus the light scattering angle is not easily controlled, and the light scattering effect is only controlled by the ratio of the concave-convex structure 130 in the light emitting surface 120 to the whole surface.

And we use regular particles to operate, specifically select the round particles of ceramic material to perform the die surface impact processing, and at the same time, to perform the round particle screening with the smaller difference mesh (mesh) gap, for example, we use 1000 mesh and 5000 mesh screens to screen 13 μm to 2.6 μm particles, and use 5000 mesh and 10000 mesh screens to screen 2.6 μm to 1.3 μm particles, and use these two particles to perform the die surface impact processing, so as to obtain two surfaces with different curvature radii.

The convex portion in the concave-convex structure 130 in the present embodiment may be a portion formed by the side walls of two adjacent concave portions, or may be a flat portion between two adjacent concave portions.

In fig. 4(a) - (c), we simulate the polar intensity distribution of the optical device corresponding to the results of three surfaces, i.e., the smooth surface without the concave-convex structure 130, the concave-convex structure 130 surface formed by 13 μm to 2.6 μm particles, and the concave-convex structure 130 surface formed by 2.6 μm to 1.3 μm particles, on the light emitting surface 120. From fig. 4(a) - (c) we can see that the relief structure 130 has different spreading angles in the same situation over the whole surface. As can be seen from fig. 5(a) - (c), the light emitting regions corresponding to the three gradually increase.

In addition, in the experimental process, the inventors compared the light scattering effect corresponding to the optical device when the curvature diameter of any one of the grooves in the concave-convex structure 130 is between 1 μm and 5 μm, and between 5 μm and 10 μm, and the results are shown in fig. 6(a) and 6 (b). Specifically, fig. 6(a) is a light scattering intensity distribution diagram corresponding to the optical device when the curvature diameter of the groove in the concave-convex structure is between 1 μm and 5 μm, and fig. 6(b) is a light scattering intensity distribution diagram corresponding to the optical device when the curvature diameter of the groove in the concave-convex structure is between 5 μm and 10 μm. It should be noted that, in fig. 6, each light scattering intensity distribution diagram is a rectangular candela distribution diagram formed by irradiating the light emitting surface 120 with radiation, and is referred to as a rectangular candela distribution diagram respectively.

The sizes of the lenses 100 in fig. 6 are the same, and the difference is that the simulated light-emitting angle in fig. 6(a) is that the curvature diameter of the groove in the concave-convex structure 130 is controlled to be between 1 micron and 5 microns, and the simulated light-emitting angle in fig. 6(b) is that the curvature diameter of the groove in the concave-convex structure 130 is controlled to be between 5 microns and 10 microns, so that the control of the curvature diameter of the groove in the concave-convex structure 130 can obtain the desired illumination angle without greatly changing the structural size of the lens 100.

The embodiment of the utility model provides an optical device, including lens 100, and be formed with concave-convex structure 130 on the play plain noodles 120 of lens 100, the diameter of curvature of any recess in concave-convex structure 130 is in 0.1-100 μm within range, through this setting for each convex part in concave-convex structure 130 or the difference of the curved surface radius between the concave part can not be too big, and then make light through above-mentioned concave-convex structure 130 back scattering angle can not too big or undersize, thereby make the utility model provides an optical device when reducing the colour difference of light when passing through lens 100, effectively improves the availability factor of light. And simultaneously, on the utility model provides an on the basis of the optical device, through the curvature radius of controlling each curved surface in the concave-convex structure 130 and concave-convex structure 130 account for the proportion of lens play plain noodles 120, can realize higher light-emitting utilization ratio, and the required illumination light-emitting angle of corresponding service environment, and adopt above-mentioned mode to realize the regulation of light-emitting utilization ratio and illumination light-emitting angle, the regulative mode is simple, can effectively save design time, and can obtain different light shape achromatism lens 100 according to the use needs, satisfy the application of different occasions.

Compared with the prior art, the utility model, have following apparent advantage, the utility model discloses based on non-imaging optics theory, utilize energy conservation law and mie scattering principle, accomplished lens 100's design, carry out the solid modeling with the help of 3D CAD modeling software to calculate lens 100's structure simultaneously through optical computation software. Compared with the traditional design method, the method greatly saves time and can accurately control the light.

Further, preferably, the material of the lens 100 having high transparency and refractive index can also be used as one of the control factors of light scattering, and the light diffusion lens 100 having the above-mentioned structure according to the present invention can provide an illumination angle capable of effectively diffusing a specific requirement under the light radiation characteristics of a Light Emitting Diode (LED). Therefore, the light-diffusing lens 100 of the present invention can be used as a light-emitting device for an indicator lamp in an indoor lighting device, an advertisement device, a sign, a display, or the like, and a light-emitting device for a shop decoration or display device, and has wide applicability and high efficiency.

In an alternative embodiment, as shown in fig. 7, the lens 100 further includes a total reflection surface 140 connecting the light incident surface 110 and the light emitting surface 120. With the optical device provided in this embodiment, the light rays obliquely incident on the sidewall of the lens 100 after passing through the light incident surface 110 can pass through the full emitting surface to irradiate on the light emitting surface 120, and then exit from the light emitting surface 120. Specifically, in general, the light ray incident through the central region of the light incident surface 110 generally reaches the light emitting surface 120 directly after being refracted through the light incident surface 110, is refracted through the light emitting surface 120 and the concave-convex structure 130 thereon and then exits, and the light ray passing through the edge region of the light incident surface 110 generally reaches the total reflection surface 140, is reflected to the position of the light emitting surface 120 through the total reflection surface 140, and finally exits through the light emitting surface 120 and the concave-convex structure 130 thereon. It should be noted that the central region and the edge region of the light incident surface 110 may be located on the same plane or curved surface, or may be located on different planes or curved surfaces, which may be flexibly selected according to the use requirement, and are not limited herein.

Through the scheme provided by the embodiment, the light rays irradiated into the lens 100 through the light incident surface 110 can all be emitted through the light emitting surface 120, so that a high light utilization rate is achieved, the light rays can be more converged, most of the light rays can all be emitted through the preset region (the light emitting surface 120 or the region with the concave-convex structure 130 in the light emitting surface 120), so that chromatic aberration is eliminated, and the light emitting effect meets the preset effect.

In an alternative embodiment, the diameter of curvature of any of the grooves in the relief structure is in the range of 0.8-10 μm. Adopt the parameter that this embodiment provided, can be so that light passes through above-mentioned concave-convex structure back scattering angle within reasonable scope, thereby make the utility model discloses when the colour difference of optical device when reducing light and passing through lens that the embodiment provides, the availability factor of light can also effectively be improved, and respond well.

In an alternative embodiment, as shown in fig. 8, the optical device further comprises a housing 200, the housing 200 having an inner cavity 210 for accommodating the light source 300 and an opening communicating with the inner cavity 210, the lens 100 being mounted at the opening. Specifically, the light incident surface 110 of the lens 100 is located at the inner side, and the light emitting surface 120 is located at the outer side. The lens 100 may be protruded from the housing 200, may be embedded in the housing 200, and may be flexibly selected according to the use requirement, which is not limited herein.

When in use, the light source 300 is mounted on the inner wall of the housing 200, and the light emitted from the light source 300 is irradiated into the lens 100 through the light incident surface 110 and then emitted through the light emitting surface 120. By adopting the scheme provided by the embodiment, the main bodies of the light source 300 and the lens 100 can be prevented from being exposed, so that the risk of damaging the light source 300 and the lens 100 can be effectively reduced, and the aesthetic degree of the optical device can be improved.

In an alternative embodiment, as shown in FIG. 8, a reflective layer 220 is formed on the inner wall of the housing 200. Specifically, the reflective layer 220 may be a reflective film attached to the inner wall of the housing 200, a reflective coating applied to the inner wall of the housing 200, or a layered structure with a reflective function formed on the inner wall of the housing 200 by other methods, and may be flexibly selected according to the use requirement, which is not limited herein. The reflective layer 220 is disposed such that the light irradiated onto the inner wall of the housing 200 can be reflected to the position of the lens 100 and exit the housing 200 through the lens 100, thereby further improving the utilization rate of the light.

In an alternative embodiment, as shown in fig. 7 to 9, at least a partial region of the light incident surface 110 is a curved surface protruding in a direction away from the light emitting surface 120.

Specifically, the light incident surface 110 in the embodiment may be a curved surface protruding toward a direction away from the light emitting surface 120, or a local area may be the curved surface, and other areas are planes, cylindrical surfaces 112 or surfaces with other shapes, which may be determined according to the light emitting effect, and is not limited herein. So, light can be to both sides transmission after this curved surface gets into lens 100 body, realizes the first diffusion of light, later passes through concave-convex structure and then the second diffusion again, can further improve the scattering effect of lens 100 to light.

In an alternative embodiment, as shown in fig. 7, the light incident surface 110 includes a curved surface 111 protruding in a direction away from the light emitting surface 120 and a cylindrical surface 112 surrounding the curved surface 111, and the cylindrical surface 112 is located on a side of the curved surface 111 away from the light emitting surface 120.

With this structure, the light source 300 can be disposed in the cavity defined by the cylindrical surface 112, so that the lighting device using the optical device provided by this embodiment has a more compact structure and a smaller volume.

In an alternative embodiment, as shown in fig. 9, the lens 100 has a long bar-shaped structure, and the light incident surface 110 has a bar-shaped tooth surface.

In particular, the lens 100 of this embodiment may be of an optical grade synthetic plastics material having a pair of surfaces, one of which has a series of concentric rings forming a Fresnel lens and the other of which has a frosted glass surface forming an image surface, and the image surface is coated with an optically micro-concave-convex surface of controlled size over a range. The light incident surface 110 in this embodiment may be a flat surface with a Fresnel (Fresnel) structure, or may be a curved surface 111 formed in a convex lens shape or a concave lens shape, and has functions of refracting incident light and totally internally reflecting light.

By adopting the scheme provided by the embodiment, the light source 300 can adopt a strip structure or an array structure to realize large-area light emission.

In an alternative embodiment, a fresnel lens structure is provided on the light-incident surface. This allows the focal length of the lens to be shorter. The fresnel lens is furthermore an optical grade acrylic plastic and the tooth-like structures are formed as an arrangement of known formulae. The concave-convex structure on the light-emitting surface can be made by casting plastic by using replica or mould on the surface of ground glass. The relief structure is thus replicated by electroforming or molding to produce the desired glass surface.

In the above embodiments, the lens obtained by designing the light incident surface using a Total Internal Reflection (TIR) structure or a lens effect of a fresnel lens surface may obtain an excellent illumination characteristic, and may form a thin lens with a large degree of freedom in design. Each of the above embodiments has a feature, and may constitute a new embodiment or a modification of a certain embodiment. Although not shown as an example, the effect of the present invention can be also provided by forming a composite lighting device using the lens structure as described above.

In the above embodiments, the lens may be made of a highly transparent plastic material such as acrylic, and the light source may be a Light Emitting Diode (LED) having a light radiating surface which need not have a lenticular configuration for enhancing directivity, but may be configured to form a structure having a hemisphere.

Referring to fig. 1, 7 to 9, in another embodiment of the present invention, a lighting device is provided, which includes a light source 300 and the optical device provided in the above embodiments.

Specifically, the light source 300 may be an LED light source, or other light sources, and may be flexibly selected according to the use requirement.

The embodiment of the utility model provides a lighting device has adopted the optical device that above-mentioned each embodiment provided, can effectively improve the availability factor of light when reducing the colour difference of light when passing through lens 100. And simultaneously, on the utility model provides a lighting device's basis, through the curvature radius and the concave-convex structure of each curved surface account for the proportion on lens play plain noodles in the control concave-convex structure, can realize higher light-emitting utilization ratio to and the required illumination light-emitting angle of corresponding service environment, and adopt above-mentioned mode to realize the regulation of light-emitting utilization ratio and illumination light-emitting angle, and the regulative mode is simple, can effectively save design time, and can obtain different light shape achromatism lens according to the use needs, satisfy the application of different occasions.

The foregoing is only a preferred embodiment of the present invention, and the technical principles of the present invention have been specifically described, and the description is only for the purpose of explaining the principles of the present invention, and should not be construed as limiting the scope of the present invention in any way. Any modifications, equivalents and improvements made within the spirit and principles of the invention and other embodiments of the invention without the creative effort of those skilled in the art are intended to be included within the protection scope of the invention.

Claims (10)

1. An optical device is characterized by comprising a lens, wherein the lens is provided with a light incidence surface and a light emergence surface, a concave-convex structure is formed on the light emergence surface, the concave-convex structure is formed by grooves which are distributed at intervals and/or connected, and the curvature diameter of each groove is within the range of 0.1-100 mu m.

2. The optical device of claim 1, wherein the lens further comprises a total reflection surface connecting the light entry surface and the light exit surface.

3. The optical device of claim 1, wherein the grooves have a diameter of curvature in the range of 0.8-10 μm.

4. The optical device of claim 1, further comprising a housing having an interior cavity for receiving a light source and an opening in communication with the interior cavity, the lens being mounted at the opening.

5. The optical device of claim 4, wherein a reflective layer is formed on an inner wall of the housing.

6. The optical device according to any one of claims 1 to 5, wherein at least a partial region of the light incident surface is a curved surface that is convex in a direction away from the light exit surface.

7. The optical device according to any one of claims 1 to 5, wherein the light incident surface includes a curved surface protruding in a direction away from the light emitting surface and a cylindrical surface surrounding the curved surface, the cylindrical surface being located on a side of the curved surface away from the light emitting surface.

8. The optical device of claim 1, wherein the lens has an elongated configuration and the input surface has a tooth-shaped surface.

9. The optical device of claim 8, wherein a fresnel lens structure is formed on the light incident surface.

10. A lighting device comprising a light source and the optical device of any one of claims 1-9, wherein the light source is located on a light incident side of the optical device.

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