WO2010045763A1

WO2010045763A1 - Light collimating device

Info

Publication number: WO2010045763A1
Application number: PCT/CN2008/072802
Authority: WO
Inventors: 崔铁生
Original assignee: 深圳市中电开拓实业有限公司
Priority date: 2008-10-23
Filing date: 2008-10-23
Publication date: 2010-04-29

Abstract

A light collimating device (100) includes a lamp housing (104), a reflective surface (101) located in the lamp housing (104), and a spot light source (102) arranged in the lamp housing (104). The reflective surface (101) is a part of a parabolic rotating body. The spot light source (102) is arranged at the focal point of the reflective surface (101) and faces to the reflective surface (101). And all of the light emits in parallel after being reflected by the reflective surface (101).

Description

Instruction manual light collimation device

Technical field

[1] The present invention relates to a luminaire assembly, and more particularly to a concentrating device.

Background technique

[2] Traditional light sources, such as incandescent lamps, fluorescent lamps, and various gas discharge lamps, are spherical, cylindrical, or linear illuminators. To be used in concentrating applications, these sources are often placed in a parabolic reflector. Since these light sources are present

360° spherical or cylindrical illumination, no matter how it is mounted at a relative angle to the parabolic reflector, some of the light will be directly reflected or scattered, and only a part of the light that is directed to the reflective surface will be reflected by the light, making it difficult to obtain good convergence. Light effects and high light source utilization. If you take two reflections, you can reduce the scattered light, but the same increase the attenuation of light caused by multiple refractions. In addition, the direct light from a strong source of light produces dazzling glare that makes the person's vision uncomfortable and can cause disgust, discomfort, and even loss of vision.

[3] With the development of science and technology, lighting-level point sources have emerged in recent years. The most representative ones are high-power semiconductor light-emitting diodes (light emitting diodes).

LED), its light source is almost a point.

[4] After the emergence of high-power LED lighting sources, although the size of the lighting fixtures using this new light source has undergone some adaptive adjustment, the lamps used for collecting light still use the traditional light source light emitting direction and reflecting surface. A structure in which the mouth direction is the same and the two are coaxial.

[5] High-power LEDs have the advantage that traditional light sources can't match, but their peers have some weaknesses due to their light-emitting principles and process limitations. Especially in applications, existing high power

LED concentrating devices still use the structure of the above conventional luminaires, causing many defects, especially in the three problems of high-efficiency concentrating projection, heat dissipation and glare pollution.

[6] First, we are from high power

The principle and basic structure of the solid-state illumination of LEDs reveal that light is emitted from a non-solid shielding surface, and its light exit angle is less than or equal to 180 degrees of the spherical surface, usually at 110 degrees to Between 130 degrees. Thus the high power of this structure

The LED is mounted in the reflective surface of the concentrating luminaire in a conventional manner. First, it has almost no light that is emitted toward the reflecting surface, so there is no reflection. Second, it mainly emits light, and the beam angle is generally spherical.

Within 130 degrees, both are

The opening of the parabolic reflector directly exits the luminaire and continues to travel straight along the exit angle, eliminating the possibility of gathering again. Therefore, it is difficult to obtain a good concentrating effect by using such a structure.

[7] Secondly, point light source, whether it is a high-power LED or other point source of light-emitting principle, because its light-emitting volume is reduced to a point or a point, and the luminous power and power consumption must be maintained at the original level, the work will be generated And gather a lot of heat, if you do not export quickly, you can't work normally. In particular, high-power LEDs, with their inherent semiconductor physical structure, must not withstand higher operating temperatures, and it is a low-voltage, high-current electronic device that inevitably generates a large amount of heat under operating conditions. Therefore, in the existing lamp structure, in order to enable the high-power LED to dissipate heat well, the high-power LED is fixed to the root of the reflecting surface, and even does not extend beyond the focus position of the parabolic reflecting surface. Since the high power LED deviates from the focal point of the reflecting surface, the light reflected by the reflecting surface cannot be emitted in parallel. It can be seen that achieving an ideal concentrating effect and good heat dissipation becomes a contradiction that is difficult to reconcile.

[8] Furthermore, the more serious problem is: Compared with the size of the light-emitting part of the traditional surface light source, the high-power LED can be regarded as a point light source, if its area ratio is a thousand times, in other words, the same Compared with the same amount of emitted light flux, if the conventional direct mounting structure is still used, the point light source emits light a thousand times higher than the conventional light source, and its glare intensity is much more harmful to the visual source than the conventional light source. . Unless the lighting device is designed for special occasions that produce intense glare.

Summary of the invention

[9] The technical problem to be solved by the present invention is to provide a concentrating device capable of achieving better concentrating and focusing on the above-mentioned defects of the conventional concentrating device and the point source concentrating device of the conventional structure. Anti-glare effect.

[10] The technical solution adopted by the present invention to solve the technical problem thereof is: constructing a concentrating device, comprising a lamp housing, a reflecting surface located in the lamp housing, and a point light source disposed in the lamp housing, The reflecting surface is a part of a parabolic rotating body, and the point light source is disposed at a focus of the reflecting surface and faces the reflecting surface, so that all emitted light is reflected by the reflecting surface and then exits in parallel. [11] According to the concentrating device of the present invention, the beam exit angle of the point source is α, and the angle of the opening of the reflecting surface around the axis of rotation of the parabolic rotator is β, then β>α .

[12] The concentrating device according to the present invention, the concentrating device further includes a fixing base disposed at a bottom of the lamp housing, the fixing base including a light source fixing surface and a light shielding protrusion, the point The light source is disposed on the light source fixing surface, and the light shielding convex portion is disposed beside the light source fixing surface for blocking light rays directly from the point light source to the reflecting surface.

[13] The concentrating device according to the present invention, the bottom of the lamp housing is provided with a straight hole, and the fixed base is columnar

And being fixed in the straight hole; the light source fixing surface is a chamfered surface of the top of the fixed base.

[14] According to the concentrating device of the present invention, the bottom of the lamp housing is provided with an inclined hole, and the fixed base is columnar

And being fixed in the inclined hole, the light source fixing surface is a concave surface of the top of the fixed base, and the light shielding convex portion is an annular side wall surrounding the fixing surface of the light source.

[15] The concentrating device according to the present invention, the opening of the lamp housing is circular, and includes two symmetrical portions, each of which is provided with a reflecting surface; the fixing pedestal is disposed at the two portions Between the light source mounting portion and the light shielding convex portion, a point light source corresponding to the reflecting surface is disposed on the light shielding convex portion.

[16] According to the concentrating device of the present invention, the opening of the lamp housing has a circular shape, and a plurality of reflecting surfaces are disposed inside, and the point light source and the fixing base are respectively disposed in each reflecting surface.

[17] According to the concentrating device of the present invention, the opening of the lamp housing has a rectangular shape, and a plurality of reflecting surfaces arranged side by side are disposed inside, and the point light source and the fixing base are respectively disposed in each reflecting surface.

[18] According to the concentrating device of the present invention, the bottom of the lamp housing is further provided with a heat dissipating device, and the fixing base is in close contact with the heat dissipating device.

[19] The concentrating device according to the present invention, wherein a point light source has a beam exit angle of less than 180°, and a central axis of the exiting beam of the point source intersects a rotation axis of the parabolic rotator and forms 80° ~

An angle of 150°.

[20] The concentrating device embodying the present invention has the following beneficial effects:

[21] 1

The utilization of the point source is improved, so that the spot light source of the same power has a longer range, and the light source consumption can be reduced under the same range requirement.

[22] 2 Since the main rays are emitted parallel to the direction of the rotation axis of the parabolic reflecting surface, the scattered light pollution is reduced.

[23] 3

The light emitted by the strong light source is projected onto the reflecting surface, and the light-shielding protrusion is arranged to block the direct light. Compared with the light of the conventional point source, the light is reflected by the reflecting surface and is emitted, which is equivalent to an expansion. The area where the light is emitted allows the light to be evenly and gently emitted into the concentrating device, avoiding the strong irritating and visual damage of the glare.

[24] 4

Because the reflective surface of the non-fully symmetric parabolic shape is used, not only the light source can be accurately placed on the focus of the parabolic reflecting surface, but also the heat sink can be placed at the position close to the point source, so that the fixed base can be minimized. The way to derive heat, reduce the thermal gradient, improve the heat dissipation effect, meet the requirements of the point light source, and ensure its service life.

[25] 5

Since the emitted light is mixed by reflection and then illuminating the concentrating device, the common defects such as the spot, the jaundice, the chromatic aberration of the center of the beam and the surrounding color, which are often caused by the direct light of the high-power LED device, can be significantly improved.

[26] 6

Compared with the conventional concentrating device, especially the device with the heating electrode (for example, the bulb, the lamp), the point source of the concentrating device of the invention has the advantages of high vibration resistance and impact resistance, and Suitable for mobile, vibration and possible work environments.

[27] 7

Compared with the conventional lamp structure, the concentrating device of the present invention is not difficult to manufacture, but the space of the parabolic reflecting surface is saved, the volume can be reduced, the cost can be reduced, and the design is more flexible and changeable;

[28] 8

By using the principle of the present invention, not only a single concentrating device for a single light source but also a plurality of such concentrating devices can be combined and deformed to form a concentrating device of two or more light sources to adapt to Large projection distance, the need for greater projection power.

DRAWINGS

The invention will be further described with reference to the accompanying drawings and embodiments in which: [30] FIG. 1A is a schematic view of a beam exit angle of a point source in the present invention;

Figure 1B is a schematic view showing the angle between the central axis of the beam of the point source and the axis of rotation of the parabolic reflecting surface in the present invention;

[32] FIG. 1C is a schematic view showing a projection area of a light beam of a point source on a parabolic reflecting surface according to the present invention;

Figure 2A is a schematic view showing the working area of the parabolic reflecting surface in the opening direction of the present invention; [34] Figure 2B is a left side view of Figure 2A;

Figure 2C is a plan view of Figure 2A;

[36] FIG. 3A is a schematic structural view of a fixing base in a first embodiment of the present invention;

Figure 3B is a left side view of Figure 3A;

Figure 3C is a plan view of Figure 3A;

[39] FIG. 3D is a schematic view showing the assembly of the fixed base and the point light source in the first embodiment of the present invention;

Figure 3E is a cross-sectional view of the light collecting device in the first embodiment of the present invention;

4A is a schematic structural view of a fixing base in a second embodiment of the present invention;

Figure 4B is a plan view of Figure 4A;

4C is a schematic view showing the assembly of the fixed base and the point light source in the second embodiment of the present invention;

4D is a cross-sectional view of a light collecting device in a second embodiment of the present invention;

5A is a schematic structural view of a fixing base in a third embodiment of the present invention;

Figure 5B is a left side view of Figure 5A;

Figure 5C is a plan view of Figure 5A;

Figure 5D is a cross-sectional view of a light collecting device in a third embodiment of the present invention;

Figure 5E is a right side view of Figure 5D;

6A is a schematic view of a concentrating device in a fourth embodiment of the present invention, showing a case in which a concentrating device is used in combination;

6B is a schematic view of a concentrating device in a fifth embodiment of the present invention, showing another case of a combination application of the concentrating device;

6C is a schematic view of a concentrating device in a sixth embodiment of the present invention, showing another case of a combination application of the concentrating device;

6D is a schematic view of a concentrating device in a seventh embodiment of the present invention, showing another application of the concentrating device combination. a situation;

6E is a schematic view of a concentrating device in an eighth embodiment of the present invention, showing another case of a combination application of the concentrating device.

Detailed ways

Referring to FIG. 3E, in the present invention, the concentrating device 100 includes a lamp housing 104, a reflecting surface 101 in the lamp housing 104, and a point light source 102 disposed in the lamp housing 104. The reflecting surface 101 is a part of the parabolic rotating body, and the point light source 102 is disposed at the focal point thereof through the fixed base 103, and the light emitting direction is directed toward the reflecting surface 101, and the emitted light is reflected by the reflecting surface 101, and is reflected from the reflecting surface 101. The openings are emitted in parallel.

The shaded portion shown in Figures 1A-1C is the area formed by the point source 102 projected onto the parabolic rotator.

In the design process, the point source 102 of appropriate power is selected according to the size of the concentrating device 100 and the spotlight projection requirement, and the reflecting surface 101 is designed accordingly.

Referring to FIGS. 1A and 3E, in an embodiment of the present invention, the point light source 102 may be an LED or an LED module composed of a plurality of LEDs. Considering that the beam exit angle α of the point source 102 is less than or equal to 180° of the spherical surface, generally 110 to 130°, the angle β of the opening section of the reflecting surface 101 in FIG. 2A around the parabolic rotation axis OA is greater than α. All the light emitted by the point source 102 can be projected onto the reflecting surface 101, and reflected by the reflecting surface 101 and then emitted in parallel. In a preferred embodiment of the invention, β is 180°.

Referring again to FIGS. 1B and 3B, the light source exiting direction of the point source 102 is directed toward the reflecting surface 101. In order to prevent the reflecting surface 101 from intercepting and reflecting the light beam from the point source 102 as much as possible, the light of the edge is prevented or reduced from being reflected from the point source 102 without being reflected. Similarly, the point source 102 and the fixed base are avoided as much as possible. 1 03 hindering the reflected light, avoiding or reducing the defocusing and attenuation of the multiple refraction, the angle Θ between the central axis FB of the exiting beam of the point source 102 and the rotating axis OA of the reflecting surface 101 is preferably 80° to 150° , preferably 110°. This is calculated in conjunction with the beam exit angle of the point source 101. Referring to Fig. 1C, the light emitted by the point source 102 can be totally projected onto the reflecting surface 101 and is not directly projected.

The shape of the reflecting surface 101 determined accordingly is as shown in Figs. 2A-2C. In the embodiment shown, the reflecting surface 101 is half of the parabolic rotator and is a non-fully symmetric reflecting surface. In Figs. 2A and 2B, the reflecting surface 101 is not symmetrical about the rotation axis OA, and in Fig. 2C, the reflecting surface 101 is symmetrical about the rotation axis OA.

Referring to FIG. 3E, the reflecting surface 101 is located on the inner surface of the lamp housing 104. The lamp housing 104 is made of a metal or non-metal material having a certain strength and withstanding a certain temperature, for example, steel, aluminum, glass, plastic. Wait Made by cutting, stamping, forging, melting, hot pressing or injection molding. The reflecting surface 101 is surface treated to enhance the light reflecting ability. According to the design requirements of different lamps, the shape, material and processing technology of the reflecting surface 101 can be changed.

Referring to Figures 3A-3E, the fixed base 103 is used to fix the point source 102 such that the point source 102 is disposed at a predetermined angle to the focus of the reflecting surface 101. The fixed base 103 is made of a material having a certain mechanical strength and good thermal conductivity, such as silver, copper, aluminum, graphite, etc., and has a cylindrical shape, for example, a cylinder, an elliptical cylinder, or a polygonal column. A light source fixing surface 1031 is provided at the top of the fixed base 103. The light source fixing surface 10 31 is inclined at an angle with respect to the rotation axis OA of the reflection surface 101.

In the first embodiment shown in FIGS. 3A to 3E, the light source fixing surface 1031 is at an acute angle to the extending direction of the fixed base 103. The light source fixing surface 1031 is a chamfered surface of the fixed base 103. A light-shielding projection 1032 is provided beside the light source fixing surface 1031 toward the opening direction of the reflection surface 101 for blocking a small amount of direct light which may directly exit the concentrating device. The height of the light-shielding projection 1032 is preferably such that the direct light is blocked, but the reflected light is not interfered as much as possible.

[63] The fixed base 103 not only sets the point light source 102 at a predetermined angle to the focus of the reflecting surface 101, but also intersects the central axis FB of the outgoing beam with the rotating axis OA of the reflecting surface 101, and also functions as an electrical connection. The wire connected to the point source 102 can pass therethrough. Further, since the fixed base 103 is made of a material having good heat conductivity and is in close contact with the point light source 102, the heat of the point light source 102 can be conducted.

A straight hole 1041 is provided at the bottom of the lamp housing 104. The fixed base 103 is fixed in the straight hole 1041, and the extending base 103 extends in a direction perpendicular to the rotation axis OA of the reflecting surface 101. The lower portion of the lamp housing 104 is also fixedly provided with a heat dissipating device 106. The fixing base 103 passes through the straight hole 1041 of the lamp housing 104 and is in close contact with the heat sink 106. Working 吋, the heat generated by the point source 102 can be conducted to the heat sink 106 to avoid heat accumulation.

[65] In the first embodiment, the lamp housing 104 and the heat sink 106 are integral, and the fixed base 103 is a separate component. In other cases, they may be three independent components, or two. The two combined processing, or the three are integrally formed as a whole, and constitute a concentrating device.

4A-4D, in the second embodiment of the present invention, the same portions as those of the first embodiment will not be described. In the concentrating device 200 of this embodiment, the fixed base 203 is cylindrical, and the light source fixing surface 2031 is a concave surface of the top of the fixed base 203. The light-shielding projection 2032 is an annular side wall surrounding the light source fixing surface 2031. In In the second embodiment, the light source fixing surface 2031 is perpendicular to the extending direction of the fixed base 203, and the depth of the light source fixing surface 2031 is recessed to block direct light, but it is preferable to not interfere with the reflected light as much as possible.

[67] An inclined hole 2042 is provided at the bottom of the lamp housing 204. The fixing base 203 is fixed in the inclined hole 2042, and the extending direction of the fixing base 203 is at an acute angle with the rotation axis OA of the reflecting surface 201. The point light source 202 is fixed on the light source fixing surface 2031, and the surrounding light shielding protrusion 2032 blocks the light which may directly exit the lamp housing 204, thereby avoiding glare.

Referring to Figures 5A-5E, in the third embodiment of the present invention, the same portions as those of the first embodiment will not be described. As shown in FIGS. 5D and 5E, in this embodiment, the opening of the lamp housing 304 is circular, and includes two symmetrical portions, wherein the first portion 3043 is internally provided with a parabolic reflecting surface 3011, and the second portion 3044 is internally provided with a parabola. The reflective surface 3012 has an symmetry axis of OC. A hole 3041 is provided between the first portion 3043 and the second portion 3044 of the lamp housing 304, and the center line of the hole 3041 coincides with OC. The fixed base 303 is disposed in the hole 3041

As shown in FIGS. 5A-5C, the fixing base 303 includes a fixing portion 3033 that cooperates with the hole 3041, a light source mounting portion 3034, and a light shielding protruding portion 3032, wherein the fixing portion 3033 is cylindrical, and the light source mounting portion 3034 In the shape of a truncated cone, the small diameter end is connected to the fixing portion 3033, and the large diameter end is connected to the light shielding convex portion 3032. Two light source fixing faces 3031, 3035 are provided on the circumferential surface of the light source mounting portion 3034. To facilitate the fixing of the point light source 102, the light source fixing faces 3031, 3035 can be recessed inward. In this embodiment, the light source fixing faces 3031, 3035 may be parallel to the surface contour of the portion corresponding to the light source mounting portion 3034. The light source fixing faces 3031, 3035 are respectively located at the focal points of the parabolic reflecting faces 3011, 3012, and the tilting angles thereof cause the light rays emitted from the light sources 3011, 3022 to be projected onto the corresponding reflecting faces.

[70] The light-shielding projection 3032 is provided at a large diameter end of the light source mounting portion 3034 and has a flange shape. The height of the protrusion is such that it blocks the direct light, but does not interfere with the reflected light as much as possible. At the end of the fixed base 303, an external heat sink can be provided, and heat is dissipated.

Compared with the other embodiments described above, the concentrating device in the third embodiment combines two reflecting surfaces and two point light sources with each other, and simultaneously fixes the two point light sources on the same fixed base. , providing more convenience and a wider use of space.

6A-6D illustrate other embodiments of a plurality of concentrating device combination applications. As shown in FIG. 6A, in the fourth embodiment, the lamp housing 404 is circular in the opening direction, and includes three independent parabolic reflecting surfaces 4011. 4012, 4013 are respectively provided with fixed bases 4031, 4032, 4033 for fixing the point light source. These fixed bases are disposed in the surrounding area inside the lamp housing ₄₀₄ as seen from the opening direction of the lamp housing 404. Light is emitted from the surrounding area inside the lamp housing ₄₀₄ toward the center and then reflected.

[73] As shown in FIG. 6B, in the fifth embodiment, the lamp housing 504 is circular in the opening direction, and includes three independent parabolic reflecting surfaces 5011, 5012, and 5013, respectively, for fixing therein. The fixed bases 5031, 5032, 5033 of the point light source are viewed from the opening direction of the lamp housing 404, and the fixed bases 5031, 5032, 5033 are disposed in the central area, and the light is emitted from the central area in the lamp housing 404 to the surroundings, and then reflected. . In this embodiment, the fixed bases 5031, 5032, 5033 can be provided in one piece.

[74] As shown in FIG. 6C, in the sixth embodiment, the lamp housing 604 is circular in the opening direction, and includes six independent parabolic reflecting surfaces 6011, 6012, 6013, 6014, 6015, 6016 therein. Fixed bases 6031, 6032, 6033, 6034, 6035, 6036 for fixing point light sources are respectively provided. The parabolic reflecting faces 6011, 6012 are disposed in the central region in the same manner as the third embodiment (shown in Figs. 5D, 5E). The other four parabolic reflecting surfaces 6013, 6014, 6015, 6016 are disposed in the surrounding area in a manner similar to that of the fourth embodiment (shown in Fig. 6B).

[75] As shown in FIG. 6D, in the seventh embodiment, the lamp housing 704 has a rectangular shape in the opening direction, and includes a plurality of parabolic reflecting surfaces 7011, 7012 and the like arranged side by side, and is respectively provided with a fixed point light source. Fixed base 7031, 7032, and the like. Each of the fixed bases is disposed at a focus of the corresponding reflecting surface, and is a parallel combination.

[8] As shown in FIG. 6E, in the eighth embodiment, the lamp housing 804 has a rectangular shape in the opening direction, and includes two upper and lower rows of parabolic reflecting surfaces, each of which includes a plurality of independent parabolic reflecting surfaces 8011. 8012, 8013, 801 4, etc., in which fixed bases 8031, 8032, 8033, 8034 and the like for fixing a point light source are respectively disposed. Each of the fixed bases is disposed at a focus of the corresponding reflecting surface, and is a parallel combination.

Since the position and manner of setting the fixed base can be changed as needed, it is not described in detail in each embodiment.

[78] The concentrating device of the present invention projects most or all of the light onto the parabolic reflecting surface to cause the light to exit in parallel, which has the following beneficial effects:

[79] 1. The utilization of the point source is improved, so that the point source of the same power has a longer range, and the source consumption can be reduced under the same range requirement.

[80] 2. Since the main rays are emitted parallel to the direction of the rotation axis of the parabolic reflector, the scattered light is reduced. Pollution.

[81] 3. The light emitted by the strong light source is projected onto the reflecting surface, and the light-shielding protrusion is arranged to block the direct light. Compared with the light of the conventional point source, the light is reflected by the reflecting surface and is emitted. It is equivalent to expanding the area of light emission, so that the light can be emitted evenly and gently into the concentrating device, avoiding the strong stimulation of vision and visual damage caused by glare.

[82] 4. Because the reflective surface of the non-fully symmetric parabolic shape is used, not only the light source can be accurately placed on the focal point of the parabolic reflecting surface, but also the heat sink can be placed at the position close to the point source, so that the fixed base The seat can extract heat in the shortest way, reduce the thermal gradient, improve the heat dissipation effect, meet the requirements of the point light source, and ensure its service life.

[83] 5. Since the emitted light is mixed by reflection and then illuminating the concentrating device, the common defects such as the spot, the jaundice, the chromatic aberration of the center of the beam and the surrounding color, which are often caused by the direct light of the high-power LED device, can be significantly improved.

[84] 6. Compared with the conventional concentrating device, especially the device with the heating pole (for example, the bulb, the lamp), the point source of the concentrating device of the invention has extremely high vibration resistance and impact resistance. The advantages are more suitable for moving, vibrating and possible falling working environments.

[85] 7. Compared with the traditional lamp structure, the concentrating device of the invention has no difficulty in the production, but saves the space of the parabolic reflecting surface, the volume can be reduced, the cost can be reduced, and the design is more flexible and changeable; [86] 8. Using the principle of the present invention, not only a single concentrating device for a single light source, but also a plurality of such concentrating devices can be combined and deformed to form a concentrating device of two or more light sources. Adapt to the need for larger throw distances and greater projection power.

Claims

Claim

[1] A light collecting device comprising a lamp housing, a reflecting surface located in the lamp housing, and a point light source disposed in the lamp housing, wherein the reflecting surface is a part of a parabolic rotating body, The point light source is disposed at a focus of the reflecting surface and faces the reflecting surface, so that all emitted light is reflected by the reflecting surface and then exits in parallel.

[2] The light collecting device according to claim 1, wherein a light beam exit angle of the point light source is

α, an angle of the opening cross section of the reflecting surface around the rotation axis of the parabolic rotator is β, and 贝β”α> α.

[3] The concentrating device according to claim 1, wherein the concentrating device further comprises a fixing base disposed at a bottom of the lamp housing, the fixing base comprising a light source fixing surface and a light shielding protrusion The point light source is disposed on the light source fixing surface, and the light shielding convex portion is disposed beside the light source fixing surface for blocking light rays directly from the point light source to the reflecting surface.

[4] The concentrating device according to claim 3, wherein the bottom of the lamp housing is provided with a straight hole, the fixed base has a column shape and is fixed in the straight hole; It is a chamfered surface of the top of the fixed base.

[5] The concentrating device according to claim 3, wherein the bottom of the lamp housing is provided with a slanting hole, the fixing base is column-shaped, and is fixed in the slanting hole, the light source fixing surface It is a concave surface of the top of the fixed base, and the light shielding convex portion is an annular side wall surrounding the fixing surface of the light source.

[6] The concentrating device according to claim 3, wherein the opening of the lamp housing is circular, and comprises two symmetrical portions, each of which is provided with a reflecting surface; Between the two parts, a light source mounting portion and a light shielding convex portion are included, and a point light source corresponding to the reflecting surface is disposed on the light shielding convex portion.

[7] The concentrating device according to claim 3, wherein the opening of the lamp housing is circular, and a plurality of reflecting surfaces are disposed inside, and the point light source and the fixing base are respectively disposed in each reflecting surface seat.

[8] The concentrating device according to claim 3, wherein the opening of the lamp housing has a rectangular shape, and a plurality of reflecting surfaces arranged side by side are disposed inside, and the point light source and the reflecting surface are respectively disposed in each of the reflecting surfaces Fixed base.

[9] The concentrating device according to claim 3, wherein the bottom of the lamp housing is further provided with heat dissipation The fixing base is in close contact with the heat sink.

[10] The concentrating device according to claim 2, wherein a light beam exit angle of the point light source is less than 180°, and a central axis of the exiting light beam of the point light source intersects a rotation axis of the parabolic rotator And form an angle of 80 ° ~ 150 °.