CN221171934U - Multi-reflecting-surface lens capable of increasing dodging effect - Google Patents

Abstract

The utility model provides a multi-reflecting-surface lens capable of increasing a light homogenizing effect, which solves the problems that in the prior art, the size of a light homogenizing device with a single-layer reflecting surface is limited and cannot be miniaturized, the light homogenizing effect is poor due to the fact that a multi-layer reflecting surface is selected for reducing the size of the device, and scales for improving the uniformity of light spots are arranged at the same angle, so that part of light beams escape from gaps of the scales. The multi-reflecting-surface lens is provided with the multi-layer reflecting surfaces, the scales for enhancing the uniform light are arranged on the reflecting surfaces, the scales of the adjacent reflecting surfaces are arranged in a staggered mode, the scale gaps of the front reflecting surfaces correspond to the scale centers of the rear reflecting surfaces, the escape of emergent light from the gaps of the scales is reduced, adverse effects on final emergent light spots are avoided, and the uniform light effect is improved.

Description

Multi-reflecting-surface lens capable of increasing dodging effect

Technical Field

The utility model relates to the technical field of semiconductor illumination, in particular to a multi-reflecting-surface lens capable of increasing a dodging effect.

Background

With the continuous development of the LED application industry, LED light sources have been widely used as illumination light sources. In many application scenarios, there is a high requirement for uniformity of the LED light source, and the LED light source is often used together with a device for controlling the beam angle. Common means of controlling the beam angle include TIR lenses, reflector cups, etc. The TIR lens is formed by collecting and processing light rays by adopting a total reflection principle, and can obtain perfect light ray utilization and beautiful facula effect. The efficiency of the TIR lens can reach more than 90%, and the TIR lens has the advantages of high light energy utilization rate, less light loss, small light collecting area, good uniformity and the like. The reflecting cup is a reflector which uses a point light source bulb as a light source and needs long-distance spotlight illumination, is commonly called as a reflecting cup, and is mostly used for controlling illumination distance, illumination area and light spot effect. After the beam angle control device is adopted, the final emergent light spot can be influenced, so that the uniformity of the light beam is reduced, and a device capable of increasing the light homogenizing effect is needed to be designed.

Among the prior patents, the application number is CN201220241296.2, the patent with the publication date of 2012, 12 and 12 discloses an LED bulb reflecting cup with a small light-emitting angle, the LED bulb reflecting cup is of a multi-layer bulb structure, bulbs are radially increased from the bottom of the reflecting cup to the top end of the reflecting cup, each layer is divided into a plurality of parts, and each part is provided with a row of bulb structures; the distance between the bottom of the reflecting cup and the light emitting surface of the LED lamp is 2.0-3.5 mm, and the optimal distance is 2.98 mm. The bulb-shaped reflecting surface has good light condensing performance, and when the projection distance of the lamp is 10 meters, the diameter of an illuminated light spot is only 0.4 meter; the uniformity is high, the uniformity of the projected light spots is obviously improved, and the illuminance uniformity can reach 0.6; the light effect of the reflecting cup can reach 97% by adopting a surface shape suitable for light condensation and a suitable scale structure. The disadvantage of this patent is that only one reflective layer is designed, the size of the device is limited and miniaturization is not possible.

Patent application number CN201420851464.9, publication No. 2015, 7, 8 discloses an optical structure having: the optical structure comprises an emergent surface/first refraction surface arranged on the top, a containing cavity, a first reflection surface/second refraction surface, a multi-layer squama structure second reflection surface, a first incidence surface/third refraction surface, a second incidence surface and a fourth refraction surface, wherein the containing cavity and the first reflection surface/second refraction surface extend from the center of the emergent surface/first refraction surface to the inside of the optical structure, the multi-layer squama structure second reflection surface is connected with the emergent surface/first refraction surface, and the first incidence surface/third refraction surface and the second incidence surface/fourth refraction surface extend from the bottom of the multi-layer squama structure second reflection surface to the inside of the optical structure. Although the patent contains a plurality of reflecting surfaces, the scales between the reflecting surfaces are all arranged in the same direction and at the same angle, and part of light can escape through gaps between the scales, so that the final emergent light spots are adversely affected.

Disclosure of utility model

In order to solve the problems that in the prior art, the size of a light homogenizing device with a single-layer reflecting surface is limited and cannot be miniaturized, the light homogenizing effect is poor due to the fact that a plurality of layers of reflecting surfaces are designed for reducing the size of the device, and scales for improving the uniformity of light spots are arranged at the same angle to cause part of light beams to escape from gaps of the scales, the utility model provides a multi-reflecting-surface lens capable of improving the light homogenizing effect. And the scales between the adjacent reflecting surfaces are staggered, so that light beams escaping from the gaps of the scales are reduced, and the light homogenizing effect is improved.

The specific technical scheme is as follows: a multi-reflecting-surface lens capable of increasing light homogenizing effect comprises a lens outer surface, wherein a plurality of reflecting surfaces are arranged in the lens outer surface, scales are arranged on the reflecting surfaces, and scales of adjacent reflecting surfaces are staggered.

The multilayer reflection surface is designed so that the device is not limited in size and can be miniaturized, but the problem of poor light-homogenizing effect is caused at the same time, so that the device needs to be compensated by other designs. The scales are one of important ways to enhance uniform light and improve light spot uniformity, and the staggered scales can reduce light beams escaping from the gaps of the scales.

Preferably, the reflecting surfaces are concentrically arranged, and the diameters of the reflecting surfaces sequentially increase from the bottom of the lens to the lens opening along the axial direction of the lens.

The shape of the outer surface of the lens is cup-shaped, the reflecting surface is arranged along the inner wall of the lens, light beams emitted by the light source are reflected and emitted from the opening of the lens, and the specific size of the lens and the angle between the reflecting surface and the axial direction of the lens can be determined according to the actual application requirements.

Preferably, the scales on the single reflecting surface are uniformly arranged.

Preferably, the scale is a cambered scale, the concave surface of the scale faces the center of the outer surface of the lens, and the scale is square in shape.

Compared with the common planar scale, the cambered surface scale has better light-homogenizing effect, and the square scale can be uniformly and orderly arranged on each layer of reflecting surface, so that the light-homogenizing effect of a single reflecting surface is improved.

Preferably, the reflecting surface has the same number of scales in the axial direction of the outer surface of the lens, and the reflecting surface has the same number of scales in the circumferential direction of the lens.

The same number of scales in the circumferential direction can lead the circle center angles corresponding to the scales on different reflecting surfaces to be the same, and the scales are only required to be offset by the same angle during arrangement.

Preferably, the reflecting surface is provided with n scales in the circumferential direction of the lens, and the angular intervals between the scales centers of adjacent reflecting surfaces are (360 °/n)/2.

The angle interval can ensure that the scale clearance of the front reflecting surface corresponds to the scale center of the rear reflecting surface, and the scale center of the rear reflecting surface intercepts the light beams escaping from the scale clearance of the front reflecting surface, so that the influence on the final emergent light spots is reduced.

Preferably, the lens is integrally designed, and the outer surface of the lens is integrally formed with the reflecting surface. The angle and spacing of the reflective surfaces can be determined based on the uniformity requirements and manufacturing requirements of the final exit spot.

Compared with the prior art, the utility model has the beneficial effects that:

The multi-reflecting-surface lens provided by the utility model comprises a plurality of layers of reflecting surfaces, so that the lens can be smaller and thinner compared with a single-layer light homogenizing device, and the cambered surface scale is arranged on the reflecting surface, thereby enhancing the light homogenizing effect.

The adjacent reflecting surfaces of the lens are staggered by the scales, so that the scale gaps of the front layer correspond to the scale centers of the rear layer, the light beams emitted from the scale gaps of the front layer are ensured to be reflected by the scales of the rear layer, the escape of the light beams is reduced, and adverse effects on final emergent light spots are avoided.

Drawings

FIG. 1 is a schematic illustration of a prior art multi-reflector lens employing a common scale distribution;

FIG. 2 is a schematic diagram of a multi-reflector lens according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a gap exit path of a multi-reflector lens according to an embodiment of the present utility model;

In the figure: 1. the lens outer surface, 2, the reflecting surface, 3, the scale, 4, the light source, 5, the clearance outgoing light path, 21, the first reflecting surface, 22, the second reflecting surface, 23, the third reflecting surface, 24 and the fourth reflecting surface.

Detailed Description

The following describes a specific embodiment of the technical scheme of the present utility model by way of examples and with reference to the accompanying drawings.

The utility model designs a multi-reflecting-surface lens capable of increasing the light homogenizing effect, solves the problem that the lens cannot be miniaturized due to size limitation in the single-reflecting-surface design, reduces the adverse effect of light escaping from a scale gap on a final emergent light spot by changing the scale distribution of adjacent reflecting surfaces 2 into staggered arrangement, and enhances the light homogenizing effect.

Most of common dodging devices are of a single-layer structure, such as a single-layer reflecting cup, and the uniformity of the final emergent light spot is required to have strict size requirements during design, and the shape of the device is limited, so that the device cannot be made smaller and thinner, and the miniaturization is difficult to achieve, and the practicality of the devices is influenced.

After the light homogenizing device is designed into a multi-layer structure, the effect, uniformity and the like of the final emergent light spots are determined by the multi-layer reflecting surfaces, so that the appearance of the light homogenizing device is reduced by combining the multi-layer reflecting surfaces through a certain design, the thickness and the size of the light homogenizing device are superior to those of the light homogenizing device with a single-layer structure, and the light homogenizing device accords with the development trend of the current LED light source. However, the outgoing light of the light homogenizing device with a multilayer structure is reflected by the multilayer reflecting surface, so that the uniformity of the final outgoing light spot is poor, and a certain design is needed to optimize the light homogenizing effect.

The scale is one of important ways for enhancing the light homogenizing effect and improving the uniformity of light spots, and the scale is generally arranged in the light homogenizing device. The scales comprise a plane scale and an arc-surface scale, wherein the uniform light effect of the arc-surface scale is better than that of the plane scale, so that the plane scale is changed into the arc-surface scale in a common uniform light device.

Referring to fig. 1, a schematic diagram of a multi-reflecting surface lens using a common scale distribution in the prior art is shown, and the distribution of the multi-reflecting surface lens in the prior art is generally an arrangement of aligning the scales center, and the scale gaps on different reflecting surfaces are correspondingly aligned.

In use, most of the light beam emitted from the light source 4 is reflected by the scale 3 provided on the reflecting surface 2, but part of the light beam is emitted through the gap of the scale 3 and is not reflected effectively. At this time, the scale gaps on the different reflecting surfaces 2 are aligned, the escaped light beams cannot be intercepted by the scales 3 of the other reflecting surfaces 2, and the part of the emergent light beams finally escape from the scale gaps of all the reflecting surfaces 2 to form secondary light spots, so that the uniformity of the final emergent light spots is lower and the design requirement cannot be met.

Referring to fig. 2, a schematic structural diagram of a multi-reflecting surface lens provided in an embodiment of the present utility model is shown, where the multi-reflecting surface lens provided in the embodiment of the present utility model includes a lens outer surface 1, the lens outer surface 1 is in a cup shape, a bottom is used for mounting a light source 4, and an outgoing direction of a light beam is an opening of the lens outer surface 1. The diameter of the bottom of the lens outer surface 1 is smallest, the diameter of the lens outer surface 1 increases from small to large in the axial direction, and the maximum diameter is reached at the lens opening.

The inner wall of the outer surface 1 of the lens is provided with a plurality of layers of reflecting surfaces 2, the number of the reflecting surfaces 2 can be selected according to actual application scenes, and the number of the reflecting surfaces 2 is 4 layers. The reflecting surfaces 2 are closely attached to the outer surface 1 of the lens, and in this embodiment, the angles between the reflecting surfaces 2 and the axial direction of the lens are the same, but the different reflecting surfaces 2 differ by a certain distance, and the distance is determined by the requirements in the manufacturing process. The lens outer surface 1 and the reflecting surface 2 of the multi-reflecting-surface lens are integrally formed, and in order to release a product from a die in the manufacturing process, the angle and the interval of the reflecting surface 2 are required to be designed so as to meet the final emergent light spot uniformity and manufacturing requirements.

In this embodiment, the angles of all the reflecting surfaces 2 and the axial direction of the lens are the same, and in other embodiments, the angles can be designed to be different to meet the design requirements.

The reflecting surfaces 2 are provided with scales 3, the scales 3 are square cambered surface scales, and the concave surfaces of the scales 3 are arranged towards the center of the lens. The scales 3 on the reflecting surface 2 are uniformly distributed, that is, the scales 3 in the same radial direction in the same reflecting surface 2 are aligned with each other as the center, and the number of scales 3 arranged in the same radial direction in the reflecting surface 2 along the axial direction in this embodiment is 7.

The number of the scales 3 arranged along the circumferential direction of the lens on the different reflecting surfaces 2 is the same and uniformly arranged, and in this embodiment, the number of the scales 3 arranged along the circumferential direction of the lens in the reflecting surfaces 2 is 40, that is, the number of the scales 3 on each layer of reflecting surfaces 2 is 280, and the scales 3 on the same reflecting surface 2 are the same.

Since the diameters of the different reflection surfaces 2 are different and the number of the scales 3 arranged in the circumferential direction of the lens is the same, the widths of the scales 3 on the different reflection surfaces 2 are different, the widths of the scales 3 on the first reflection surface 21 are the smallest, the widths of the scales 3 on the reflection surface 2 are sequentially increased closer to the lens opening, and the widths of the scales 3 on the fourth reflection surface 24 are the largest.

Because the number of the scales 3 arranged in the circumferential direction of the lens on each layer of the reflecting surface 2 is the same, the circle center angles corresponding to each scale 3 on different reflecting surfaces 2 are the same, so that the scales 3 on different reflecting surfaces 2 can be conveniently and wrongly arranged and timed. The scales 3 provided on the different reflecting surfaces 2 are the same in length, and therefore the lengths of the reflecting surfaces 2 in the lens axial direction of each layer are the same.

The scales 3 on adjacent reflecting surfaces 2 are arranged in a staggered manner, namely, the gaps of the scales 3 on the front reflecting layer 2 correspond to the centers of the scales 3 on the rear reflecting layer 2. Because the circle center angles corresponding to the scales 3 on different reflecting surfaces 2 are the same, the positions of the scales 3 can be staggered by adjusting the same angle between the adjacent reflecting surfaces 2, so that the gaps of the scales 3 of the front reflecting surface 2 correspond to the centers of the scales 3 of the rear reflecting surface 2, the escaped light beams are intercepted, and the influence on the final emergent light spots is reduced.

In the technical scheme of the utility model, the number of the scales 3 arranged on the reflecting surface 2 along the circumferential direction of the lens is n, and the interval of the scales 3 angles between the adjacent reflecting surfaces 2 is (360 degrees/n)/2, namely, half of the circle center angle corresponding to the single scale 3. The interval of the scale 3 angles between the adjacent reflecting surfaces 2 in this embodiment is 4.5 °, that is, the radial angles of the scale 3 between the first reflecting surface 21 and the second reflecting surface 22, the second reflecting surface 22 and the third reflecting surface 23, and the third reflecting surface 23 and the fourth reflecting surface 24 are different by 4.5 °.

Referring to fig. 3, a schematic view of a gap exit path of a multi-reflecting surface lens according to an embodiment of the present utility model is shown, where, in operation, a light source 4 is disposed at the bottom center of the lens, and the light source used in this embodiment is an SMD2835 lamp bead. Most of the light beam emitted from the light source 4 is reflected by the scale 3 provided on the reflecting surface 2 and emitted from the opening of the lens to form a final outgoing spot. In which part of the light beam passes through the gap of the bulb 3 and is not reflected effectively, i.e. as in the gap exit path 5, near the light source 4. The light path emerges from the light source 4 through the gap between the scales 3 on the first reflecting surface 21.

In the multi-reflecting surface lens provided by the utility model, when the light path passes through the second reflecting surface 22, the light beam is incident on the center of the scale 3 on the second reflecting surface 22, and can be effectively reflected by the scale 3. Also in this way, the light beam escaping from the second reflecting surface 22 can be reflected by the scale 3 on the third reflecting surface 23, the light beam escaping from the third reflecting surface 23 can be reflected by the scale 3 on the fourth reflecting surface 24, at this time, the light beam escaping from the gap between the scales 3 is basically intercepted by the scales 3 on the rear reflecting layer 2, the intensity of the remaining escaping light beam is very low, the influence on the final emergent light spot is small, and the uniformity thereof is not affected.

In summary, the present utility model provides a multi-reflecting surface lens capable of increasing the light homogenizing effect, which includes a plurality of reflecting surfaces, and eliminates the size limitation caused by a single reflecting surface, so that the lens can be smaller and thinner. The scales for enhancing the uniform light are arranged on the reflecting surfaces, the scales of the adjacent reflecting surfaces are staggered, the scale gaps of the front reflecting surfaces correspond to the scale centers of the rear reflecting surfaces, the escape of emergent light from the gaps of the scales is reduced, adverse effects on final emergent light spots are avoided, and the uniform light effect is improved.

In addition to the above embodiments, the technical features or technical data of the present utility model may be rearranged and combined within the scope of the claims and the description of the present utility model to constitute new embodiments, which may be implemented without inventive effort by those skilled in the art, and thus, embodiments of the present utility model not described in detail should be considered as embodiments of the present utility model within the scope of the protection of the present utility model.

Claims (7)

1. The multi-reflecting-surface lens capable of increasing the light homogenizing effect is characterized by comprising a lens outer surface (1), wherein a plurality of reflecting surfaces (2) are arranged in the lens outer surface (1), scale nails (3) are arranged on the reflecting surfaces (2), and the scale nails (3) of adjacent reflecting surfaces (2) are arranged in a staggered mode;

The gap of the scale (3) of the former reflecting surface (2) corresponds to the center of the scale (3) of the latter reflecting surface (2).

2. The multi-reflecting surface lens capable of increasing the dodging effect according to claim 1, wherein the reflecting surfaces (2) are concentrically arranged, and the diameters of the reflecting surfaces (2) sequentially increase from the bottom of the lens to the lens opening along the axial direction of the lens.

3. A multi-reflecting surface lens capable of increasing a dodging effect according to claim 2, wherein the scales (3) on the reflecting surface (2) are uniformly arranged.

4. A multi-reflecting surface lens capable of increasing a dodging effect according to claim 1 or 3, wherein said scale (3) is a cambered scale with its concavity facing the lens center, and said scale (3) is square in shape.

5. A multi-reflecting surface lens capable of increasing a dodging effect according to claim 2 or 3, wherein the number of the scales (3) of the reflecting surface (2) in the axial direction of the lens is the same, and the number of the scales (3) of the reflecting surface (2) in the circumferential direction of the outer surface (1) of the lens is the same.

6. A multi-reflecting surface lens capable of increasing a dodging effect according to claim 1, 2 or 3, wherein the reflecting surface (2) is provided with n scales (3) in the circumferential direction of the lens, and the angular intervals between the centers of the scales (3) of adjacent reflecting surfaces (2) are (360 °/n)/2.

7. A multi-reflecting surface lens capable of increasing a dodging effect as claimed in claim 1, characterized in that the lens is of unitary design, the lens outer surface (1) being integral with the reflecting surface (2).