Zoom optical system and lamp

Abstract

The utility model relates to the field of illumination, in particular to a zoom optical system and a lamp. The zoom optical system comprises a light source, a lens and a reflection cup, the lens is installed in a reflection cavity of the reflection cup, the light incident face of the lens and a light incident opening of the reflection cup are arranged on the same side, and a gap exists between the side wall of the lens and the cup wall of the reflection cup. The light source is provided with at least two light-emitting areas, a switch of the light-emitting areas can be independently controlled, light emitted by at least one light-emitting area is emitted to the light incident face of the lens, and light emitted by at least one light-emitting area is emitted to the gap. According to the zoom optical system provided by the utility model, the gap for light to enter is reserved between the lens and the reflection cup, other light paths different from the original light path of the lens can be formed, and the zoom optical system is matched with at least two light-emitting areas capable of independently controlling a switch. The light distribution angle of illumination finally emitted by the optical system can be changed by opening or closing different light-emitting areas, so that zooming of the optical system is realized.

Description

Technical Field

[0001] The utility model relates to the field of lighting, in particular to a zoom optical system and a lamp. Background Art

[0002] In the field of lighting, a zoom lamp refers to a lamp whose light distribution angle and coverage range can be adjusted according to actual needs. The commonly used zoom method for zoom lamps on the market is to change the focal length by adjusting the distance between the light source and the lens. For example, the Chinese patent with the announcement number CN209893151U provides a sliding column on the lens and a rotation groove on the rotating ring seat, and changes the assembly distance between the light source and the lens by rotating the lens, thereby achieving zoom; in general implementations, the lens is rotated manually, which is cumbersome to adjust and limits the application scenarios, and cannot achieve automatic adjustment; a possible solution is to set a motor inside the lamp, and use the motor to drive the light source or lens to change the assembly distance between the two, but the setting of the motor needs to occupy a large volume inside the lamp, which will also greatly increase the weight and cost of the lamp. Utility Model Content

[0003] The purpose of the present invention is to overcome the problems in the background art of manual zoom adjustment of lamps and the large volume and high cost of setting up motor automatic zoom, and to provide a zoom optical system and a lamp.

[0004] In a first aspect, the present invention provides a zoom optical system comprising a light source, a lens, and a reflector cup, wherein the lens is mounted in a reflective cavity of the reflector cup, a light incident surface of the lens and a light entrance of the reflector cup are arranged on the same side, and a gap is formed between a side wall of the lens and a wall of the reflector cup;

[0005] The light source has at least two light-emitting areas that can be independently controlled by a switch, wherein: the light emitted by at least one of the light-emitting areas is emitted toward the light incident surface of the lens, and the light emitted by at least one of the light-emitting areas is emitted toward the gap.

[0006] The present invention provides a zoom optical system that, by adjusting the assembly method of the lens and reflector, leaves a gap between the lens and reflector for light to enter, thereby forming a different optical path from the original optical path of the lens. Due to the difference in light deflection between the different optical paths, the light emitted through the different optical paths has different light distribution angles. In conjunction with at least two independently controllable light-emitting zones, the light distribution angle of the final light emitted by the optical system can be changed by turning the different light-emitting zones on or off, thereby achieving zoom of the optical system. The present application uses at least two independently controllable light-emitting zones in conjunction with the lens and reflector, not only simplifying the zoom method, but also multiple reflections and refractions of light through the lens and reflector, allowing most of the light to be emitted from the light outlet, thereby improving light extraction efficiency, reducing energy loss, and increasing lighting brightness.

[0007] Preferably, the light incident surface of the lens has a light incident hole.

[0008] Preferably, the light source includes a first light-emitting area and a second light-emitting area, the first light-emitting area faces the light incident hole, and the second light-emitting area faces the gap.

[0009] Preferably, the second light-emitting area includes at least two light-emitting units arranged radially at intervals, and switches of the light-emitting units can be controlled independently.

[0010] Multiple light-emitting units correspond to the gaps, and different light-emitting units are located in different positions relative to the reflective cup, so that the illumination formed by the light emitted by different light-emitting units is different. By switching different light-emitting units on and off, illumination with different light distribution angles can be obtained, thereby realizing multi-level zoom of the optical system.

[0011] Preferably, the light emitting unit is annular and faces the inner wall of the reflective cup.

[0012] The light emitted by the light-emitting unit can be reflected by the reflective cup first and then transmitted through the lens, which can reduce the light escaping from the light inlet of the reflective cup, improve the utilization rate of light energy, and also facilitate the adjustment of the light distribution angle of the emitted light by changing the inclination angle of the inner wall of the reflective cup and the lens.

[0013] Preferably, the lens is a small-angle lens, comprising a light incident surface, a light emitting surface and a side wall surface, the side wall surface is located between the light incident surface and the light emitting surface, and the light emitting surface is provided with a concave tapered groove.

[0014] A small-angle lens refers to a lens whose light distribution angle is less than 20 degrees.

[0015] Preferably, the side wall surface of the lens includes a first side wall and a second side wall distributed axially along the main axis of the lens, the first side wall is close to the light entrance hole, the first side wall is a convex curved surface, and the first side wall corresponds to the side surface of the light entrance hole.

[0016] The first side wall can converge the light entering from the light entrance hole of the lens, so that the light can be emitted at a small angle after being reflected.

[0017] Preferably, the included angle between the second side wall and the light emitting surface is smaller than the included angle between the first side wall and the light emitting surface.

[0018] Preferably, the reflective cup comprises a first reflective area and a second reflective area axially distributed along the central axis, the lens is located in the first reflective area, and the gap is located between the outer wall of the lens and the inner wall of the first reflective area;

[0019] The second reflective area is located on the light-emitting side of the lens, and the light outlet of the second reflective area is covered with a light distribution lens plate. The incident surface of the light distribution lens plate is provided with a first light-entering microstructure and a second light-entering microstructure. The second light-entering microstructure is annular, and the first light-entering microstructure is located in the ring sleeve of the second light-entering microstructure.

[0020] The second reflective area and the light distribution lens plate can be used to distribute light and optimize the output light to meet the illumination needs.

[0021] Preferably, a light incident plane is provided between the first light incident microstructure and the second light incident microstructure, and the light incident plane is located on the optical path of the light incident from the light incident hole.

[0022] The light incident microstructure and the light incident plane correspond to light of different optical paths respectively to meet the adjustment needs of various light. For example, the light incident plane is located on the optical path of the light incident from the light incident hole, which can reduce the scattering effect of the light distribution lens plate on this part of the light and obtain concentrated small-angle illumination.

[0023] Preferably, the light-emitting surface of the lens is provided with a mounting edge, the inner wall of the reflective cup is provided with a mounting platform, and the mounting edge and the mounting platform are cooperatively connected.

[0024] In a second aspect, the present invention provides a lamp comprising the zoom optical system as described above.

[0025] The utility model provides a lamp that uses the zoom optical system as described above. By adopting at least two light-emitting areas with independently controlled switching in coordination with a lens and a reflector cup, not only the zoom method is simplified, but also the light can be reflected and refracted multiple times by the lens and the reflector cup, so that most of the light can be emitted from the light outlet, thereby improving the light output efficiency, reducing energy loss and increasing the lighting brightness.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The present invention provides a zoom optical system that, by adjusting the assembly method of the lens and reflector, creates a gap between the lens and reflector for light to enter, thereby forming a different optical path from the original lens optical path. Due to the differences in light deflection between the different optical paths, the light emitted through the different optical paths has different light distribution angles. In conjunction with at least two independently controllable light-emitting zones, the light distribution angle of the final light emitted by the optical system can be changed by turning the different light-emitting zones on or off, thereby achieving zoom of the optical system. This application utilizes at least two independently controllable light-emitting zones in conjunction with the lens and reflector, not only simplifying the zoom method, but also allowing the lens and reflector to reflect and refract light multiple times, allowing the majority of the light to be emitted from the light outlet, thereby improving light extraction efficiency, reducing energy loss, and increasing lighting brightness.

[0028] 2. The utility model provides a lamp that uses the zoom optical system as described above. By adopting at least two light-emitting areas with independently controlled switching in conjunction with the lens and reflector, not only the zoom method is simplified, but also the light can be reflected and refracted multiple times by the lens and reflector, so that most of the light can be emitted from the light outlet, thereby improving the light extraction efficiency, reducing energy loss and increasing the lighting brightness. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a front view of the zoom optical system of the present invention;

[0030] Figure 2 This is an AA cross-sectional view of the zoom optical system of the present invention;

[0031] Figure 3 A bottom view of the zoom optical system of the present invention;

[0032] Figure 4 A three-dimensional diagram of the zoom optical system of the present invention;

[0033] Figure 5 This is a front view of the light distribution lens plate of the utility model;

[0034] Figure 6 This is a three-dimensional diagram of the light distribution lens plate of the utility model;

[0035] Figure 7 for Figure 6 Enlarged view of middle part B;

[0036] Figure 8 This is a schematic structural diagram of the light source of the present invention;

[0037] Figure 9 This is the light trend diagram for the first usage scenario;

[0038] Figure 10 This is the light distribution curve diagram for the first usage situation;

[0039] Figure 11 Schematic diagram of simulated light spot for the first usage case;

[0040] Figure 12 This is the light trend diagram for the second usage scenario;

[0041] Figure 13 This is the light distribution curve diagram for the second usage situation;

[0042] Figure 14 Schematic diagram of simulated light spot for the second usage case;

[0043] Figure 15 This is the light trend diagram for the third usage scenario;

[0044] Figure 16 This is the light distribution curve diagram for the third usage situation;

[0045] Figure 17 Schematic diagram of simulated light spot for the third usage scenario;

[0046] Figure 18 This is the light trend diagram for the fourth usage scenario;

[0047] Figure 19 This is the light distribution curve diagram for the fourth usage situation;

[0048] Figure 20 Schematic diagram of simulated light spot for the fourth usage scenario;

[0049] Figure 21 The following is a comparison chart of the light spots in four usage situations.

[0050] Markings in the figure:

[0051] 1- Light source;

[0052] 11-first light-emitting area; 12-first light-emitting unit; 13-second light-emitting unit; 14-third light-emitting unit;

[0053] 2- lens;

[0054] 21 - light entrance hole; 22 - tapered groove; 23 - first side wall; 24 - second side wall; 25 - light exit surface; 26 - mounting edge;

[0055] 3-Reflective cup;

[0056] 31-first reflective area; 32-second reflective area; 33-installation platform;

[0057] 4-Light distribution lens plate;

[0058] 41-first light incident microstructure; 42-second light incident microstructure; 43-light incident plane;

[0059] 5- Gap. DETAILED DESCRIPTION

[0060] The present invention will be further described in detail below with reference to specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments. All technologies implemented based on the present invention fall within the scope of the present invention.

[0061] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating orientation or positional relationships, such as "upper," "lower," "left," "right," "center," "inside," and "outside," are based on the orientation or positional relationships shown in the accompanying drawings, or are the orientation or positional relationships in which the product / device / apparatus of the present invention is typically placed when in use. These terms indicating orientation or positional relationships are merely for the purpose of facilitating the description of the present invention or simplifying the description of the specific embodiments to facilitate a quick understanding of the solutions by technicians. They do not indicate or imply that a particular device / component / element must have a specific orientation or be constructed and operated in a specific positional relationship, and therefore should not be construed as limiting the present invention.

[0062] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simply understood that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", and "parallel", and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the solution of the present utility model.

[0063] In addition, the expressions "first", "second", "third", etc. that appear in the terms are merely descriptions used to distinguish the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0064] In addition, in the description of the embodiments of the present invention, "several", "a plurality", and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0065] Furthermore, in the description of the technical solutions of this utility model, unless otherwise expressly specified / defined / restricted, the terms "disposed," "installed," "connected," "connected," "provided with," "laid," and "arranged" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections. They may be welding, riveting, bolting, threading, or other commonly used connection methods in the art. Such connections may be mechanical, electrical, or communication connections; they may be direct connections, indirect connections through an intermediate medium, or internal connections between two components.

[0066] Example 1

[0067] like Figure 1-8 As shown, this embodiment provides a zoom optical system, including a light source 1, a lens 2 and a reflector 3, wherein: the lens 2 is installed in the reflective cavity of the reflector 3, the light incident surface of the lens 2 and the light entrance of the reflector 3 are arranged on the same side, and a gap 5 is provided between the side wall of the lens 2 and the cup wall of the reflector 3; the light source 1 has at least two light-emitting areas that can be independently controlled by a switch, wherein: the light emitted by at least one light-emitting area is directed toward the light incident surface of the lens 2, and the light emitted by at least one light-emitting area is directed toward the gap 5.

[0068] See also Figure 1-4 The reflective cup 3 is an annular structure, including a cup wall and two oppositely arranged openings. The area enclosed by the cup wall can be defined as a reflective cavity, and the side of the cup wall close to the reflective cavity can be defined as a reflective inner wall. The reflective inner wall has a reflective effect on light. Light can enter the reflective cup 3 from one of the openings, and part of the light is reflected by the reflective inner wall and then emitted from the other opening. The opening for light entry can be defined as a light inlet, and the opening for light exit can be defined as a light outlet. In this embodiment, the size of the light inlet of the reflective cup 3 is smaller than that of the light outlet, and the cross-section of the reflective cavity gradually increases from the light inlet to the light outlet, so that as much light as possible can be emitted from the light outlet.

[0069] See also Figure 2 The lens 2 is an optical element made of transparent or translucent material that can transmit light. According to the position of the light source during use, the surface of the lens 2 can be divided into a light incident surface and a light exiting surface 25. A side wall is also provided between the light incident surface and the light exiting surface 25. The light source is placed on the side close to the light incident surface. The light emitted by it can enter the lens from the light incident surface and be emitted from the light exiting surface 25 after being reflected inside the lens.

[0070] The lens 2 and the reflector cup 3 are assembled and connected. The light incident surface of the lens 2 and the light entrance of the reflector cup 3 are arranged on the same side, so that when the light source 1 is arranged at the light entrance of the reflector cup 3, the light emitted by it can also enter the lens 2.

[0071] See also Figure 2 There is a gap 5 between the side wall of the lens 2 and the cup wall of the reflective cup 3, through which light can enter. In this embodiment, the gap 5 is an annular structure with an annular opening. The annular opening is on the same side as the light incident surface of the lens 2 and the light incident port of the reflective cup 3. At the end away from the annular opening, the lens 2 and the reflective cup 3 are connected, thereby closing the gap 5 at this location.

[0072] The light source 1 is preferably an LED light source having at least two light-emitting areas, and the switches of the two light-emitting areas can be independently controlled. One of the two light-emitting areas is aligned with the light incident surface of the lens 2 so that most of the light emitted by it enters the lens 2, and after being reflected inside the lens 2, it is emitted from the light-emitting surface 25 to form light with a first light distribution angle; the other of the two light-emitting areas is aligned with the gap 5 so that most of the light emitted by it enters the gap 5, and after being reflected by the reflective inner wall on one side of the gap 5, this part of the light enters from the side wall of the lens 2, and then is emitted from the light-emitting surface 25 to form light with a second light distribution angle. Since there is a difference in the deflection of the light in the above two light paths, light with different light distribution angles can be formed. In addition, the switches of the two light-emitting areas can be independently controlled. By turning on one of the light-emitting areas and turning off the other light-emitting area, or turning on both light-emitting areas at the same time, light with different light distribution angles can be obtained, thereby realizing the zoom of the optical system.

[0073] The present invention provides a zoom optical system. By adjusting the assembly method of the lens 2 and the reflector cup 3, a gap 5 is left between the lens 2 and the reflector cup 3 for light to enter, thereby forming a different optical path from the original optical path of the lens 2. Due to the difference in light deflection between the different optical paths, the light emitted through the different optical paths has different light distribution angles. In conjunction with at least two independently controllable light-emitting zones, the light distribution angle of the final light emitted by the optical system can be changed by turning the different light-emitting zones on or off, thereby achieving zoom of the optical system. The present application uses at least two independently controllable light-emitting zones in conjunction with the lens 2 and the reflector cup 3, which not only simplifies the zoom method, but also allows the lens 2 and the reflector cup 3 to reflect and refract light multiple times, allowing most of the light to be emitted from the light outlet, thereby improving light extraction efficiency, reducing energy loss, and increasing lighting brightness.

[0074] In some implementations, the light distribution angle is also called the beam angle.

[0075] The cross-sectional shape of the reflective cup 3 can be circular, square, polygonal, etc. In this embodiment, the reflective cup 3 is circular, and its overall shape is trumpet-shaped, including a large opening and a small opening. The small opening can serve as a light inlet to better receive light from a local light source, and the large opening can serve as a light outlet, so that as much light as possible inside the reflective cup 3 can be emitted from the light outlet, thereby improving light extraction efficiency.

[0076] Preferably, the lens 2 is an LED lens, and the light incident surface of the lens 2 has a light incident hole 21 ; the light entering the lens 2 from the light incident hole 21 can be totally reflected on the side wall of the lens 2 , so that most of it is emitted from the light emitting surface 25 .

[0077] Light entry hole 21 is a concave hole. Aligning the light source with the light entry hole 21 allows for maximum light to enter lens 2, thereby improving light extraction efficiency. In this embodiment, light entry hole 21 comprises a bottom surface and an annular side surface. By adjusting the shape and inclination of the bottom and side surfaces, the direction of light within lens 2 can be altered to achieve the desired illumination.

[0078] The light source 1 includes a first light emitting area 11 and a second light emitting area. The first light emitting area 11 faces the light entrance hole 21 , and the second light emitting area faces the gap 5 . The switches of the first light emitting area 11 and the second light emitting area can be controlled independently.

[0079] In one or more preferred embodiments, the second light-emitting area includes at least two light-emitting units arranged radially at intervals, and switches of the light-emitting units can be controlled independently.

[0080] See also Figure 2 、 8 In this embodiment, the first light-emitting area 11 has a circular cross-section, the second light-emitting area surrounds the outside of the first light-emitting area 11, the number of light-emitting units is 3, and the light-emitting units are several ring belts surrounding the first light-emitting area 11, which can be defined as the first light-emitting unit 12, the second light-emitting unit 13 and the third light-emitting unit 14 in radial outward order; the switch of each light-emitting unit can be controlled independently.

[0081] Preferably, the light-emitting unit faces the inner wall of the reflective cup 3; the light emitted by the light-emitting unit can be first reflected by the reflective cup 3 and then transmitted through the lens 2, which can reduce the light escaping from the light entrance of the reflective cup 3, improve the utilization rate of light energy, and also facilitate the adjustment of the light distribution angle of the emitted light by changing the inclination angle of the inner wall of the reflective cup 3 and the lens.

[0082] Since different light-emitting units are at different distances from the wall of the reflective cup 3, the positions at which the light emitted by different light-emitting units strikes the reflective cup 3 are different. After reflection and transmission, the resulting light distribution angles are also different. By turning different light-emitting units on and off, light with a variety of distribution angles can be obtained, realizing multi-level zoom of the optical system.

[0083] In one or more preferred embodiments, the lens 2 is a small-angle lens including a light incident surface, a light emitting surface 25 and a side wall surface. The side wall surface is located between the light incident surface and the light emitting surface. The light emitting surface 25 is provided with a concave tapered groove 22 .

[0084] A small-angle lens refers to a lens whose luminous angle of the outgoing light is less than 25 degrees [peak light intensity 50%], and is further preferably a lens less than 20 degrees; lens 2 uses a small-angle lens, which can make the light emitted by the first light-emitting area 11 transmitted through the lens 2 small-angle light, and combined with the medium-angle and large-angle light emitted by the second light-emitting area reflected by the reflective cup 3 and then transmitted through the lens 2, so that the optical system of the present application has a larger range of zoom adjustment range, which can meet the needs of more usage scenarios.

[0085] In this embodiment, the lens 2 is a three-reflection small-angle lens, which includes a light incident surface, a light emitting surface 25 and a side wall surface. The side wall surface is located between the light incident surface and the light emitting surface. The light emitting surface 25 is provided with a concave tapered groove 22. Figure 9 As shown, the light entering the lens 2 from the side of the light entrance hole 21 undergoes three total reflections between the side wall of the lens 2 and the wall of the tapered groove 22, and then emerges from the light exit surface 25; by changing the shape and inclination of the side wall of the lens 2 and the wall of the tapered groove 22, illumination with different light distribution angles can be obtained.

[0086] The conical groove 22 is preferably a rotationally symmetrical structure around the lens optical axis (also called the main optical axis), and the main optical axis is the rotation axis of the conical groove 22; the lens 2 and the reflective cup 3 can also be a rotationally symmetrical structure with the main optical axis as the rotation axis.

[0087] Preferably, the side wall surface of the lens 2 includes a first side wall 23 and a second side wall 24 distributed axially along the main axis of the lens. The first side wall 23 is close to the light entrance hole 21 and is a convex curved surface. The first side wall 23 corresponds to the side surface of the light entrance hole 21.

[0088] See also Figure 2 The first side wall 23 is a curved surface convex toward the gap 5. The first side wall 23 corresponds to the side of the light entrance hole 21 and can focus the light entering the lens 2 from the side of the light entrance hole 21, so that it can be reflected more concentratedly to the next wall, ultimately forming a small-angle illumination.

[0089] The first side wall 23 corresponds to the side surface of the light incident hole 21 , which means that the first side wall 23 can receive most of the light entering the lens 2 from the side surface of the light incident hole 21 .

[0090] The second side wall 24 can be a plane or a curved surface with a relatively small curvature. The angle between the second side wall 24 and the light-emitting surface 25 of the lens 2 is smaller than the angle between the first side wall 23 and the light-emitting surface 25 of the lens 2, so that the distance between the lens 2 and the reflective cup 3 gradually decreases until the lens 2 and the reflective cup 3 are connected.

[0091] like Figure 2 As shown, the second side wall 24 and the wall surface of the tapered groove 22 are approximately parallel. When light passes through the second side wall 24 and the wall surface of the tapered groove 22, the deflection angle is small, so that the light energy can be concentrated in the central local range, thereby improving the brightness of the central range and meeting the lighting needs.

[0092] In one or several preferred embodiments, the reflective cup 3 includes a first reflective area 31 and a second reflective area 32 axially distributed along the central axis, the lens 2 is located in the first reflective area 31 , and the gap 5 is located between the outer wall of the lens 2 and the inner wall of the first reflective area 31 .

[0093] See also Figure 2 According to the installation position of the lens 2, the reflective cavity in the reflective cup 3 can be divided into a first reflective area 31 and a second reflective area 32. The first reflective area 31 and the second reflective area 32 are distributed along the central axis of the reflective cup 3. The first reflective area 31 is close to the light entrance of the reflective cup 3, and the second reflective area 32 is close to the light exit of the reflective cup 3.

[0094] The second reflective area 32 is located on the light-emitting side of the lens 2. The light-emitting port of the second reflective area 32 is covered with a light-distributing lens plate 4. The incident surface of the light-distributing lens plate 4 is provided with a first light-entering microstructure 41 and a second light-entering microstructure 42. The second light-entering microstructure 42 is annular, and the first light-entering microstructure 41 is located within the ring sleeve of the second light-entering microstructure 42.

[0095] The light distribution lens plate 4 and the second reflective area 32 jointly play a light distribution role to optimize the outgoing light to meet the lighting needs; the incident surface of the light distribution lens plate 4 refers to the side close to the reflective cup 3, and the light distribution lens plate 4 is provided with a first light incident microstructure 41 and a second light incident microstructure 42 to adjust the light emitted by the second light-emitting area.

[0096] Preferably, if Figure 5-7 As shown, the first light-entering microstructure 41 and the second light-entering microstructure 42 are composed of a plurality of micro-units, each of which includes a convex curved surface, such as a free-form surface, an arc-shaped surface, etc. The micro-units 1 can be arranged in an array or an irregular array, and the array arrangement can be a linear array, a circular array or a rectangular array, etc. The micro-units can play a local small-scale focusing role, and the light is dispersed after passing the focus, forming a softer lighting.

[0097] Preferably, a light incident plane 43 is provided between the first light incident microstructure 41 and the second light incident microstructure 42 , and the light incident plane 43 is located on the optical path of the light incident from the light incident hole 21 .

[0098] The light incident microstructure and the light incident plane 43 correspond to light of different optical paths respectively to meet the adjustment needs of various light; the surface of the light incident plane 43 is relatively flat, which can reduce the scattering effect of the light distribution lens plate 4 on this part of the light, and is arranged on the optical path of the light incident from the light incident hole 21 [on the exit path of most of the light emitted by the first light-emitting area 11 after passing through the lens 2], which can reduce the scattering effect of the light distribution lens plate 4 on this part of the light and obtain concentrated small-angle illumination.

[0099] Preferably, the light-emitting surface 25 of the lens 2 is provided with a mounting edge 26 , the inner wall of the reflective cup 3 is provided with a mounting platform 33 , and the mounting edge 26 and the mounting platform 33 are cooperatively connected.

[0100] like Figure 2 、 3 As shown, the mounting edge 26 can be overlapped on the mounting platform 33, and buckles and slots can be respectively provided on the mounting edge 26 and the mounting platform 33 to achieve snap-fitting through the buckles and slots; the mounting platform 33 can be located between the first reflective area 31 and the second reflective area 32.

[0101] Example 2

[0102] See also Figure 9-20 This embodiment shows, by way of example, light trend diagrams, light distribution curves, and simulated light spots under four usage conditions:

[0103] First: If Figure 9-11 As shown, the first light emitting area 11 is turned on, and the first light emitting unit 12, the second light emitting unit 13 and the third light emitting unit 14 are turned off; most of the light emitted by the first light emitting area 11 enters the lens 2 from the light entrance hole 21, and after multiple reflections inside the lens 2, forms the following Figure 10 、 11 The small-angle illumination shown has a simulated angle [50%] of 16 degrees and a simulated efficiency [light extraction efficiency] of 75%.

[0104] Second: If Figure 12-14 As shown, the first light emitting unit 12 is turned on, and the first light emitting area 11, the second light emitting unit 13 and the third light emitting unit 14 are turned off; most of the light emitted by the first light emitting unit 12 is emitted from the gap 5 to the reflective inner wall of the reflective cup 3, and then passes through the lens 2 after reflection, forming the following Figure 13 、 14 The medium angle lighting shown; its simulated angle [50%] is 30 degrees and the simulated efficiency is 70%.

[0105] Third: If Figure 15-17As shown, the first light emitting unit 12 and the second light emitting unit 13 are turned on, and the first light emitting area 11 and the third light emitting unit 14 are turned off; most of the light emitted by the first light emitting unit 12 and the second light emitting unit 13 is emitted from the gap 5 to the reflective inner wall of the reflective cup 3, and is reflected and transmitted through the lens 2, forming the following Figure 16 、 17 The medium angle lighting shown; its simulated angle [50%] is 40 degrees and the simulated efficiency is 70%.

[0106] Fourth: If Figure 18-20 As shown, the first light emitting unit 12, the second light emitting unit 13 and the third light emitting unit 14 are turned on, the first light emitting area 11 is illuminated; most of the light is emitted from the gap 5 to the reflective inner wall of the reflective cup 3, and after reflection, it passes through the lens 2, forming the following Figure 19 、 20 The large-angle illumination shown; its simulated angle [50%] is 53 degrees and the simulated efficiency is 70%.

[0107] Figure 21 By comparing the light spot conditions under four usage conditions, it can be seen intuitively that by controlling the switching conditions of different light-emitting areas, it is possible to adjust the lighting to obtain different light distribution angles [for example: the light distribution angles in the four usage conditions in this embodiment are 16 degrees, 30 degrees, 40 degrees and 53 degrees respectively], and the energy efficiency is above 70%, with high energy utilization rate.

[0108] This embodiment only illustrates the above four usage methods, and it should not be understood that the zoom optical system of the present application only has these four usage methods; the number of light-emitting areas coordinated with the gap 5 can also be 2, 3, 5 or more. Preferably, the switching status of each light-emitting area can be independently controlled, and different light-emitting areas are set at intervals.

[0109] The simulation angle [50%] refers to the angle corresponding to 50% of the total light intensity.

[0110] Example 3

[0111] This embodiment provides a lamp, including the zoom optical system described in Example 1.

[0112] Light source 1 is an LED light source.

[0113] The utility model provides a lamp that uses the zoom optical system as described above. By adopting at least two light-emitting areas with independently controlled switching, in coordination with the lens 2 and the reflector cup 3, not only the zoom method is simplified, but also the light can be reflected and refracted multiple times by the lens 2 and the reflector cup 3, so that most of the light can be emitted from the light outlet, thereby improving the light extraction efficiency, reducing energy loss and increasing the lighting brightness.

[0114] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A zoom optical system, characterized in that: The invention comprises a light source (1), a lens (2) and a reflective cup (3), wherein the lens (2) is mounted in a reflective cavity of the reflective cup (3), a light incident surface of the lens (2) and a light entrance of the reflective cup (3) are arranged on the same side, and a gap (5) exists between the side wall of the lens (2) and the cup wall of the reflective cup (3); The light source (1) has at least two light-emitting areas that can be independently controlled by a switch, wherein: the light emitted by at least one of the light-emitting areas is directed toward the light incident surface of the lens (2), and the light emitted by at least one of the light-emitting areas is directed toward the gap (5).

2. The zoom optical system according to claim 1, wherein: The light incident surface of the lens (2) has a light incident hole (21); The light source (1) comprises a first light-emitting area (11) and a second light-emitting area, wherein the first light-emitting area (11) faces the light entrance hole (21), and the second light-emitting area faces the gap (5).

3. The zoom optical system according to claim 2, wherein: The second light-emitting area includes at least two light-emitting units arranged at intervals in the radial direction, and switches of the light-emitting units can be independently controlled.

4. The zoom optical system according to claim 3, wherein: The light-emitting unit is annular and faces the inner wall of the reflective cup (3).

5. The zoom optical system according to claim 2, wherein: The lens (2) is a small-angle lens, comprising a light incident surface, a light exit surface (25), and a side wall surface, wherein the side wall surface is located between the light incident surface and the light exit surface, and the light exit surface (25) is provided with a concave tapered groove (22).

6. The zoom optical system according to claim 5, wherein: The side wall surface of the lens (2) comprises a first side wall (23) and a second side wall (24) distributed axially along the main axis of the lens, wherein the first side wall (23) is close to the light entrance hole (21), the first side wall (23) is an outwardly convex curved surface, and the first side wall (23) corresponds to the side surface of the light entrance hole (21).

7. The zoom optical system according to claim 6, wherein: The included angle between the second side wall (24) and the light emitting surface (25) is smaller than the included angle between the first side wall (23) and the light emitting surface (25).

8. The zoom optical system according to claim 2, wherein: The reflective cup (3) comprises a first reflective area (31) and a second reflective area (32) axially distributed along the central axis; the lens (2) is located in the first reflective area (31); and the gap (5) is located between the outer wall of the lens (2) and the inner wall of the first reflective area (31); The second light-reflecting area (32) is located on the light-outlet side of the lens (2); the light-outlet port of the second light-reflecting area (32) is covered with a light-distributing lens plate (4); the incident surface of the light-distributing lens plate (4) is provided with a first light-incident microstructure (41) and a second light-incident microstructure (42); the second light-incident microstructure (42) is annular; and the first light-incident microstructure (41) is located within the annular sleeve of the second light-incident microstructure (42).

9. The zoom optical system according to claim 8, wherein: A light incident plane (43) is provided between the first light incident microstructure (41) and the second light incident microstructure (42), and the light incident plane (43) is located on the optical path of light incident from the light incident hole (21); And / or, the light-emitting surface (25) of the lens (2) is provided with a mounting edge (26), the inner wall of the reflective cup (3) is provided with a mounting platform (33), and the mounting edge (26) and the mounting platform (33) are cooperatively connected.

10. A lamp, characterized in that: Comprising the zoom optical system as described in any one of claims 1-9.

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