CN102997178A - Lens and lighting device with lens - Google Patents

Abstract

Translated fromChinese

本发明涉及一种用于照明装置的透镜，具有底面(1)和在所述底面(1)上隆起的光出射面(2)，底面(1)的中央形成凹进区域(3)，该凹进区域(3)的表面形成光入射面(4)，照明装置的光源(5)设置在该凹进区域(3)中，并且凹进区域(3)相对于光源(5)的光轴(X)旋转对称，其中，光入射面(4)上开设有多条环状沟槽(4a)，来自所述光源(5)的光线经这些环状沟槽(4a)折射后经过光出射面(2)射出。此外，本发明还涉及一种具有上述类型的透镜的照明装置。

The invention relates to a lens for an illuminating device, which has a bottom surface (1) and a raised light exit surface (2) on said bottom surface (1), a recessed area (3) is formed in the center of the bottom surface (1), said The surface of the recessed area (3) forms a light incident surface (4), the light source (5) of the lighting device is arranged in the recessed area (3), and the optical axis of the recessed area (3) relative to the light source (5) (X) Rotational symmetry, wherein the light incident surface (4) is provided with a plurality of annular grooves (4a), the light from the light source (5) is refracted by these annular grooves (4a) and then passes through the light exit Surface (2) shoots out. Furthermore, the present invention also relates to an illuminating device having the above-mentioned type of lens.

Description

Translated fromChinese

透镜以及具有该透镜的照明装置Lens and lighting device with the lens

技术领域technical field

本发明涉及一种用于照明装置的透镜。此外，本发明还涉及一种具有上述类型的透镜的照明装置。The invention relates to a lens for an illuminating device. Furthermore, the present invention also relates to an illuminating device having the above-mentioned type of lens.

背景技术Background technique

随着LED照明技术的发展，人们越来越多地将LED照明装置作为光源应用到各种环境中。由于LED芯片的制造公差的原因，LED芯片发出的光线在待照射物体上形成的实际光斑的亮度通常并不均匀。一些时候照度并不是很均匀并且色彩也不是很均匀。为了解决上述问题，获得尽可能良好的照明效果，通常需要在LED芯片上安装一个透镜，利用该透镜对LED芯片发出的光线进行调整。在现有技术中，透镜的出射面被结构化，也就是说该出射面上形成有很多任意分布的凸起或者凹面，从而形成漫射面。该漫射面对来自LED芯片的光线进行调整。另外的一种解决方案是直接在透镜的顶部加上一个漫散屏，从而对LED芯片的光线进行调整。然而，经过上述类型的透镜和漫散屏调整的光线的光分布很难被预期或者很难被模拟。经过上述类型的透镜和漫散屏调整的光线的光分布是随意的。With the development of LED lighting technology, more and more people use LED lighting devices as light sources in various environments. Due to the manufacturing tolerance of the LED chip, the brightness of the actual light spot formed by the light emitted by the LED chip on the object to be irradiated is usually not uniform. Sometimes the illumination is not very uniform and the color is not very uniform. In order to solve the above problems and obtain as good a lighting effect as possible, it is usually necessary to install a lens on the LED chip, and use the lens to adjust the light emitted by the LED chip. In the prior art, the exit surface of the lens is structured, that is to say, many randomly distributed convex or concave surfaces are formed on the exit surface, thereby forming a diffuse surface. This diffuser surface adjusts the light from the LED chips. Another solution is to directly add a diffuser screen on top of the lens to adjust the light of the LED chip. However, the light distribution of the light conditioned by the above-mentioned type of lens and diffuser screen is difficult to predict or simulate. The light distribution of the light conditioned by lenses and diffuser screens of the above type is random.

发明内容Contents of the invention

为解决上述问题，本发明提出一种用于照明装置的透镜，通过该透镜出射的光线可以在待照射的物体上实现预期的光分布效果。此外，本发明还提出一种具有上述类型的透镜的照明装置。In order to solve the above problems, the present invention proposes a lens for an illuminating device, through which light emitted by the lens can achieve a desired light distribution effect on an object to be irradiated. In addition, the present invention also proposes an illuminating device having the above-mentioned type of lens.

本发明的第一个目的通过一种透镜由此实现，即该透镜具有底面和在该底面上隆起的光出射面，底面的中央形成凹进区域，凹进区域的表面形成光入射面，照明装置的光源设置在凹进区域中，并且凹进区域相对于光源的光轴旋转对称，其中，光入射面上开设有多条环状沟槽，这些环状沟槽将来自光源的光线折射后经过光出射面射出。在根据本发明的设计方案中，来自光源的光线首先通过开设有多条环状沟槽的光入射面折射。根据希望获得的光分布可以反向计算出环状沟槽的具体构型和布置方式。The first object of the present invention is thus achieved by a lens which has a bottom surface and a raised light exit surface on the bottom surface, a recessed area is formed in the center of the bottom surface, and the surface of the recessed area forms a light incident surface for illumination. The light source of the device is arranged in the recessed area, and the recessed area is rotationally symmetrical with respect to the optical axis of the light source, wherein a plurality of annular grooves are provided on the light incident surface, and these annular grooves refract the light from the light source Emit through the light exit surface. In the design solution according to the present invention, the light from the light source is firstly refracted through the light incident surface provided with a plurality of annular grooves. The specific configuration and arrangement of the annular groove can be reversely calculated according to the desired light distribution.

根据本发明的一个优选的设计方案，凹进区域设计成类似圆锥形的，凹进区域的内锥面形成光入射面，多个环状沟槽分别形成在凹进区域的垂直于光轴的平面上，并且从凹进区域的底部至顶部彼此邻接地布置。在该布置方案中，每个环状沟槽本身限定出一个平面，这些平面分别平行于垂直于光轴的平面。通过这种环状沟槽可以将来自光源的光线调整到预期的角度，从而获得预期的光分布。According to a preferred design solution of the present invention, the recessed area is designed to be similar to a cone, the inner cone of the recessed area forms a light incident surface, and a plurality of annular grooves are respectively formed in the recessed area perpendicular to the optical axis. plane, and are arranged adjacent to each other from the bottom to the top of the recessed area. In this arrangement, each annular groove itself defines a plane which is respectively parallel to a plane perpendicular to the optical axis. The light from the light source can be adjusted to an expected angle through the annular groove, so as to obtain an expected light distribution.

优选的是，凹进区域的顶部设计成球面的。通过该球面的顶部，来自光源的光线通过透镜出射后所产生的光斑的边缘和中心的亮度都接近一致，而不会在光斑的中心形成较亮的区域，从而获得均匀的光分布。Preferably, the top of the recessed area is designed to be spherical. Through the top of the sphere, the brightness of the edge and center of the light spot generated by the light from the light source passing through the lens is close to the same, without forming a brighter area in the center of the light spot, thereby obtaining a uniform light distribution.

根据本发明的一个优选的设计方案提出，环状沟槽在由光轴穿过的平面上的截面为圆弧。这种圆弧形的截面更加有利于光线的均匀分布。According to a preferred design solution of the present invention, the section of the annular groove on the plane passing through the optical axis is an arc. This arc-shaped section is more conducive to the uniform distribution of light.

优选的是，圆弧的半径在0.1至0.5毫米之间。在该范围内的圆弧能够使光分布尽可能均匀。Preferably, the radius of the arc is between 0.1 and 0.5 mm. A circular arc in this range enables the light distribution to be as uniform as possible.

根据本发明的一个优选的设计方案提出，光出射面包括凹面弯曲的中间区域和凸面弯曲的边缘区域，并且中间区域与所述边缘区域平滑过渡，其中中间区域与所述边缘区域分别相对于光轴旋转对称。这种类型的光出射面能够在获得均匀的光分布的同时获得特定形式的照明图案。According to a preferred design solution of the present invention, the light exit surface includes a concavely curved middle region and a convexly curved edge region, and the middle region and the edge region make a smooth transition, wherein the middle region and the edge region are respectively relatively light Axis rotational symmetry. This type of light exit surface makes it possible to obtain a specific form of lighting pattern while obtaining a uniform light distribution.

本发明的另一目的通过一种具有上述类型的透镜的照明装置实现，该照明装置能够产生均匀的光分布。Another object of the present invention is achieved by a lighting device having a lens of the above-mentioned type, which lighting device is able to generate a uniform light distribution.

根据本发明的一个优选的设计方案，照明装置的光源是LED光源，LED光源作为绿色能源具有寿命长、光效高的特点。According to a preferred design solution of the present invention, the light source of the lighting device is an LED light source, and the LED light source, as a green energy source, has the characteristics of long life and high light efficiency.

附图说明Description of drawings

附图构成本说明书的一部分，用于帮助进一步理解本发明。这些附图图解了本发明的实施例，并与说明书一起用来说明本发明的原理。在附图中相同的部件用相同的标号表示。图中示出：The accompanying drawings constitute a part of this specification and are provided to help further understanding of the invention. The drawings illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. The same components are denoted by the same reference numerals in the drawings. The figure shows:

图1是根据本发明的透镜的截面图；Figure 1 is a cross-sectional view of a lens according to the present invention;

图2是光源的光线经过根据本发明的透镜后的光路图；Fig. 2 is the light path diagram after the light of the light source passes through the lens according to the present invention;

图3是根据本发明的透镜的光入射面的局部放大图。Fig. 3 is a partially enlarged view of the light incident surface of the lens according to the present invention.

具体实施方式Detailed ways

图1示出了根据本发明的透镜的截面图。从图中可见，该透镜具有底面1和在底面1上隆起的光出射面2。在底面1的中央形成凹进区域3，从图中可见，该凹进区域3设计成类似圆锥形的，并且该凹进区域3的内圆锥面形成光入射面4。照明装置的光源5(参见图2)设置在凹进区域3中，并且凹进区域3相对于该光源5的光轴X旋转对称，其中，光入射面4上开设有多条环状沟槽4a，这些环状沟槽4a将来自光源5的光线折射后经过光出射面2射出。此外，凹进区域3的顶部4b设计成球面的。在本发明的设计方案中，光源5设计成LED光源。Figure 1 shows a cross-sectional view of a lens according to the invention. It can be seen from the figure that the lens has a bottom surface 1 and alight exit surface 2 raised on the bottom surface 1 . Arecessed area 3 is formed in the center of the bottom surface 1 . As can be seen from the figure, therecessed area 3 is designed to be similar to a cone, and the inner conical surface of therecessed area 3 forms a light incident surface 4 . The light source 5 (see FIG. 2 ) of the lighting device is arranged in therecessed area 3, and therecessed area 3 is rotationally symmetrical with respect to the optical axis X of the light source 5, wherein a plurality of annular grooves are provided on the light incident surface 4 4a, theseannular grooves 4a refract the light from the light source 5 and then exit through thelight exit surface 2 . Furthermore, the top 4b of therecessed area 3 is designed spherical. In the design solution of the present invention, the light source 5 is designed as an LED light source.

从图1中进一步可见，光出射面2包括凹面弯曲的中间区域2a和凸面弯曲的边缘区域2b，并且中间区域2a与边缘区域2b平滑过渡，其中中间区域2a与边缘区域2b分别相对于光轴X旋转对称。It can be further seen from FIG. 1 that thelight exit surface 2 includes a concavelycurved middle region 2a and a convexlycurved edge region 2b, and themiddle region 2a and theedge region 2b have a smooth transition, wherein themiddle region 2a and theedge region 2b are respectively relative to the optical axis X-rotational symmetry.

图2示出了光源5的光线经过根据本发明的透镜后的光路图。从图中可见，光线经过光入射面1折射之后通过光出射面2射出。由此，来自光源5的光线在待照射物体上的分布更加均匀。Fig. 2 shows the light path diagram of the light from the light source 5 passing through the lens according to the present invention. It can be seen from the figure that the light is refracted by the light incident surface 1 and then exits through thelight exit surface 2 . As a result, the distribution of the light from the light source 5 on the object to be irradiated is more uniform.

图3示出了根据本发明的透镜的光入射面4的局部放大图。从图中可见，环状沟槽4a在由光轴X穿过的平面上的截面为圆弧。该圆弧的半径在0.1至0.5毫米之间。这种尺寸的圆弧形的轮廓能够更好的对光线进行折射，从而使光线分布更加均匀。FIG. 3 shows a partially enlarged view of the light entrance face 4 of the lens according to the invention. It can be seen from the figure that the section of theannular groove 4 a on the plane passing through the optical axis X is a circular arc. The radius of this arc is between 0.1 and 0.5 mm. The arc-shaped profile of this size can better refract the light, so that the light distribution is more uniform.

以上仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

参考标号reference number

1     底面1 bottom surface

2     光出射面2 light exit surface

2a    中间区域2a middle area

2b    边缘区域2b edge area

3     凹进区域3 recessed area

4     光入射面4 Light incident surface

4a    环状沟槽4a Annular groove

4b    凹进区域的顶部4b The top of the recessed area

5     光源5 light source

X     光轴X-ray axis

Claims (8)

1. lens that are used for lighting device, the light-emitting face (2) that has bottom surface (1) and swell in described bottom surface (1), the central authorities of described bottom surface (1) form recessed region (3), the surface of described recessed region (3) forms light entrance face (4), the light source of described lighting device (5) is arranged in the described recessed region (3), and described recessed region (3) is with respect to optical axis (X) Rotational Symmetry of described light source (5), it is characterized in that, offer many annular ditch grooves (4a) on the described light entrance face (4), penetrate through described light-emitting face (2) after described annular ditch groove (4a) refraction from the light of described light source (5).

2. lens according to claim 1, it is characterized in that, described recessed region (3) is designed to similar conical, the inner conical surface of described recessed region (3) forms described light entrance face (4), many described annular ditch grooves (4a) are respectively formed on the plane perpendicular to described optical axis (X) of described recessed region (3), and arrange from bottom to the top (4b) of described recessed region (3) with being adjacent to each other.

3. lens according to claim 2 is characterized in that, the described top (4b) of described recessed region (3) is designed to sphere.

4. lens according to claim 2 is characterized in that, the cross section of described annular ditch groove (4a) on the plane of being passed by described optical axis (X) is circular arc.

5. lens according to claim 4 is characterized in that, the radius of described circular arc is between 0.1 to 0.5 millimeter.

6. each described lens in 5 according to claim 1, it is characterized in that, described light-emitting face (2) comprises the zone line (2a) of concave surface bended and the fringe region (2b) of convex bending, and described zone line (2a) seamlessly transits with described fringe region (2b), and wherein said zone line (2a) and described fringe region (2b) are respectively with respect to described optical axis (X) Rotational Symmetry.

7. a lighting device is characterized in that, described lighting device has according to claim 1 each described lens in 6.

8. lighting device according to claim 7 is characterized in that, the light source of described lighting device is led light source.

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