Optical imaging system of spotlight and spotlight

Abstract

The utility model relates to the technical field of stage lighting, in particular to an optical imaging system of a spotlight and the spotlight. The optical imaging system of the spotlight comprises a light source, a reflector and a lens, the reflector is gradually expanded from one end to the other end in the length direction of the reflector, the light source is arranged at the small-diameter end, the lens is arranged at the large-diameter end, and part of light emitted by the light source directly irradiates the lens. And the other part of the light is irradiated to the lens after being reflected by the inner side wall of the reflector for one time or multiple times, and then is emitted out through the lens. The light source comprises a plurality of LEDs with at least two colors, a smooth mirror surface is arranged on the inner side wall of the reflector, and the cross section of the smooth mirror surface is polygonal, so that light can be subjected to complex reflection through a plurality of side surfaces of the reflector, and the light mixing effect is greatly improved; and meanwhile, the light reflectivity is effectively improved, the light is better reflected, the loss of light efficiency is reduced, more light is better collected, and the illuminance and lumen are improved.

Description

Technical Field

[0001] The present application relates to the technical field of stage lighting, and in particular to an optical imaging system of a spotlight and the spotlight. Background Art

[0002] With the maturity of LED technology, color LED lamps are constantly developing in the direction of small size, light weight and high performance. However, the color LED spotlights on the market currently generally have some disadvantages, such as uneven color mixing of light spots, color blocks, low illumination lumens and large lamp size, which make it impossible to truly and effectively present the stage effects required by the stage design. Utility Model Content

[0003] The utility model aims to provide an optical imaging system of a spotlight and a spotlight, so as to improve the uniformity of light spot color mixing to a certain extent, avoid the appearance of color blocks, and at the same time improve the illumination lumen and reduce the volume of the lamp.

[0004] The utility model provides an optical imaging system of a spotlight, comprising a light source, a reflector and a lens;

[0005] The light source includes a plurality of LEDs, and the plurality of LEDs have at least two colors;

[0006] The reflector is cup-shaped, one end of the reflector is arranged around the light source, and the other end of the reflector is provided with the lens;

[0007] The reflector gradually expands from one end facing the light source to one end facing the lens, the inner side wall of the reflector is provided with a smooth mirror surface, and the cross section of the reflector is polygonal.

[0008] Furthermore, the inner wall surface of the reflector is polished to form the smooth mirror surface.

[0009] Furthermore, the optical imaging system of the spotlight also includes a mirror panel, which is surrounded to form a shape that matches the reflector, and the mirror panel is adaptively attached to the inner wall of the reflector, and the side surface of the mirror panel facing the inside of the reflector forms the smooth mirror surface.

[0010] Furthermore, the mirror plate has a thickness of 0.15 mm to 0.5 mm; and the mirror plate is a mirror aluminum plate.

[0011] Furthermore, the inclination angle between the side wall of the reflector and the axis of the reflector is 10°-15°.

[0012] Furthermore, the cross section of the reflector is hexagonal, octagonal or decagonal.

[0013] Further, the reflector includes a first half side portion and a second half side portion, and the first half side portion and the second half side portion are detachably fastened together by a fastener.

[0014] Furthermore, the lens is an aspheric lens, the lens is a plano-convex lens, and a surface of the lens facing the light source is a plane.

[0015] Furthermore, the reflector is provided with a first connecting portion at one end facing the lens, the first connecting portion is formed with an annular groove, and one end of the lens fits into the groove;

[0016] The optical imaging system of the spotlight further comprises a pressing member, which is annular and has a central hole. The pressing member is sleeved on the outer side of the lens through the central hole. The pressing member is tightly connected to the first connecting portion, and the edge of the central hole abuts against the outer side wall of the lens.

[0017] The pressing piece is a hard plastic pressing piece.

[0018] The utility model also provides a spotlight, comprising the optical imaging system of the spotlight described in any one of the above items.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] The optical imaging system of the spotlight provided by the utility model comprises a light source, a reflector and a lens. The reflector is cup-shaped and gradually expands from one end to the other end along its length direction, that is, one end of the reflector in the length direction is a small-diameter end with a smaller diameter, and the other end of the reflector in the length direction is a large-diameter end with a larger diameter; the light source is arranged at the small-diameter end of the reflector, and the lens is arranged at the large-diameter end of the reflector, so that when the light source is lit, the light emitted by the light source can propagate toward the lens in the reflector, for example, part of the light is directly irradiated to the lens, and the other part of the light is reflected once or multiple times by the inner side wall of the reflector and then irradiated to the lens, and then emitted through the lens.

[0021] Among them, the light source includes multiple LEDs, and the multiple LEDs have at least two colors; the inner wall of the reflector is provided with a smooth mirror surface, and the cross-section of the reflector is polygonal, so that by setting the reflector to a polygonal structure, the light irradiated to the side wall of the reflector can be complexly reflected through multiple side surfaces of the reflector, thereby greatly improving the mixed light effect and avoiding the appearance of color blocks; at the same time, through the smooth mirror surface, the light reflectivity can be effectively improved, so that the light irradiated to the side wall of the reflector can be better reflected, and the loss of light efficiency can be effectively reduced, so as to better gather more light and improve the illumination lumen.

[0022] The utility model also provides a spotlight, comprising the optical imaging system of the spotlight, so the spotlight also has the beneficial effects of the optical imaging system of the spotlight. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the overall structure of an optical imaging system of a spotlight provided by an embodiment of the utility model;

[0025] Figure 2 A schematic diagram of the split structure of the optical imaging system of the spotlight provided by the embodiment of the utility model;

[0026] Figure 3 A schematic diagram of the light path of the optical imaging system of the spotlight provided in an embodiment of the utility model.

[0027] Reference numerals:

[0028] 1-reflector, 11-first half side portion, 12-second half side portion, 13-first connecting portion, 2-mirror plate, 3-lens, 4-pressing member. DETAILED DESCRIPTION

[0029] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0030] The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0031] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Refer to the following Figures 1 to 3 An optical imaging system and a spotlight according to some embodiments of the present application are described.

[0035] The present application provides an optical imaging system of a spotlight, such as Figures 1 to 3 As shown, the optical imaging system of the spotlight includes a light source, a reflector 1 and a lens 3. The reflector 1 is cup-shaped and gradually expands from one end to the other end along its length direction, that is, one end of the reflector 1 in the length direction is a small diameter end with a smaller diameter, and the other end of the reflector 1 in the length direction is a large diameter end with a larger diameter; the light source is arranged at the small diameter end of the reflector 1, and the lens 3 is arranged at the large diameter end of the reflector 1, so that when the light source is lit, the light emitted by the light source can propagate toward the lens 3 in the reflector 1, for example, part of the light is directly irradiated to the lens 3, and the other part of the light is reflected once or multiple times by the inner wall of the reflector 1 and then irradiated to the lens 3, and then emitted through the lens 3.

[0036] Among them, the light source includes multiple LEDs, and the multiple LEDs have at least two colors; the inner wall of the reflector 1 is provided with a smooth mirror surface, and the cross-section of the reflector 1 is polygonal, so that by setting the reflector 1 as a polygonal structure, the light irradiated to the side wall of the reflector 1 can be complexly reflected through multiple side surfaces of the reflector 1, thereby greatly improving the mixed light effect and avoiding the appearance of color blocks; at the same time, through the smooth mirror surface, the light reflectivity can be effectively improved, so that the light irradiated to the side wall of the reflector 1 can be better reflected, and the loss of light efficiency can be effectively reduced, so as to better gather more light and improve the illumination lumen.

[0037] In one embodiment of the present application, preferably, the inner wall surface of the reflector 1 is directly polished to form a smooth mirror surface; or Figure 2 As shown, a mirror panel 2 is arranged inside the reflector 1, and the mirror panel 2 is arranged around a polygon with the same shape as the reflector 1, and the mirror panel 2 is adapted to the reflector 1, so that the mirror panel 2 fits exactly on the inner wall of the reflector 1, and the side surface of the mirror panel 2 formed with a smooth mirror surface faces the inside of the reflector 1, so that a smooth mirror surface is formed on the inner wall of the reflector 1 through the mirror panel 2, and compared with directly polishing the inner wall of the reflector 1, the method of setting the mirror panel 2 is easier to implement and simpler to process.

[0038] In this embodiment, preferably, the mirror plate 2 is a mirror aluminum plate with a thickness of 0.15 mm-0.5 mm, so that it can be easily processed into a shape compatible with the reflector 1 without affecting the internal space size of the reflector 1. Further preferably, the thickness of the mirror plate 2 is 0.3 mm.

[0039] In this embodiment, preferably, the reflector 1 gradually expands from one end facing the light source to the end facing the upward lens 3, so that the side wall of the reflector 1 has a predetermined inclination angle relative to the axis of the reflector 1 itself, and the inclination angle is 10° to 15°, which is conducive to the propagation of light forward toward the lens 3 and improves the light emission range while being able to effectively control the size of the reflector 1.

[0040] In one embodiment of the present application, preferably, the cross-section of the reflector 1 is hexagonal, octagonal or decagonal, or more polygonal, so that the reflector 1 has multiple sides, making the light path reflected by the side wall of the reflector 1 more complex, thereby achieving a better light mixing effect.

[0041] Further preferably, the cross section of the reflector 1 is an octagon, so that the reflector 1 can meet the requirements of the light mixing effect and is easier to process.

[0042] In one embodiment of the present application, preferably, Figure 3 As shown, the lens 3 is an aspheric lens, and the lens 3 is a plano-convex lens, that is, the surface of the lens 3 facing the light source, i.e., the light incident surface of the lens 3, is a plane, and the surface of the lens 3 facing away from the light source, i.e., the light emitting surface of the lens 3, is convex along the optical axis of the lens 3, so that the lens 3 can collect light and scatter light, and through the cooperation of the plano-convex lens 3 and the reflector 1, the color mixing of the optical system can be made more uniform, and the color reproduction and image plane reproduction can also be better.

[0043] In this embodiment, preferably, the lens 3 adopts an aspherical surface and is coated, which is beneficial to correct aberrations, reduce chromatic aberration and distortion, improve the image quality of the entire field of view, and further significantly improve the transmittance and color reproduction of the entire optical imaging system.

[0044] In one embodiment of the present application, preferably, the inclination angle between the side wall of the reflector 1 and the axis of the reflector 1 is 12°, and the lens 3 is a Φ68 plano-convex lens. Thus, with the cooperation of the reflector 1 and the lens 3, the problem that the richer the color of the colorful LED light source, the more difficult it is to mix the colors evenly is solved. At the same time, the entire optical imaging system has a miniaturized and lightweight structure and appearance, and can achieve spotlight color light focusing and mixing at 15° to 60° with a total length of only 106 mm.

[0045] In one embodiment of the present application, preferably, Figure 2 As shown, the reflector 1 includes a first half side portion 11 and a second half side portion 12 along its radial direction, and the first half side portion 11 and the second half side portion 12 are detachably fastened to each other on one side by fasteners to enclose and form a complete reflector 1. Therefore, by dividing the reflector 1 into two half side portions, the mirror plate 2 can be more conveniently assembled in the reflector 1.

[0046] Regarding the installation between the lens 3 and the reflector 1, in one embodiment of the present application, preferably, a first connecting portion 13 is provided at the large diameter end of the reflector 1, and the first connecting portion 13 forms an annular groove, and one end of the lens 3 formed with a plane is inserted into the groove to fit the groove, and the plane of the lens 3 is in contact with the bottom wall of the groove.

[0047] like Figures 1 to 3 As shown, the optical imaging system of the spotlight also includes a clamping piece 4, which is in a ring shape with a center hole, and a second connecting portion is formed around the center hole of the clamping piece 4. The clamping piece 4 can be sleeved on the outside of the lens 3 through its own center hole, and the second connecting portion is connected to the first connecting portion 13 of the reflector 1 through a fastener, and the inner edge of the clamping piece 4 at the center hole is pressed against the lens 3, so that the lens 3 is stably fixed to the large-diameter end of the reflector 1 in a detachable manner.

[0048] In this embodiment, preferably, the pressing member 4 is made of hard plastic, so that the pressing member 4 has sufficient strength and can avoid damaging the lens 3 to a certain extent.

[0049] The present application also provides a spotlight, comprising the optical imaging system of the spotlight of any of the above embodiments.

[0050] In this embodiment, the spotlight includes an optical imaging system of the spotlight, so the spotlight has all the beneficial effects of the optical imaging system of the spotlight, which will not be described in detail here.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. An optical imaging system of a spotlight, characterized in that: including a light source, a reflector and a lens; The light source includes a plurality of LEDs, and the plurality of LEDs have at least two colors; The reflector is cup-shaped, one end of the reflector is arranged around the light source, and the other end of the reflector is provided with the lens; The reflector gradually expands from one end facing the light source to one end facing the lens, the inner side wall of the reflector is provided with a smooth mirror surface, and the cross section of the reflector is polygonal.

2. The optical imaging system of a spotlight according to claim 1, characterized in that: The inner wall surface of the reflector is polished to form the smooth mirror surface.

3. The optical imaging system of a spotlight according to claim 1, characterized in that: It also includes a mirror plate, which is surrounded to form a shape that matches the reflector, and the mirror plate is adaptively attached to the inner wall of the reflector, and a side surface of the mirror plate facing the inside of the reflector forms the smooth mirror surface.

4. The optical imaging system of a spotlight according to claim 3, characterized in that: The thickness of the mirror plate is 0.15mm-0.5mm; The mirror plate is a mirror aluminum plate.

5. The optical imaging system of a spotlight according to claim 1, characterized in that: The inclination angle between the side wall of the reflector and the axis of the reflector is 10°-15°.

6. The optical imaging system of a spotlight according to claim 1, characterized in that: The cross section of the reflector is hexagonal, octagonal or decagonal.

7. The optical imaging system of a spotlight according to claim 1, characterized in that: The reflector includes a first half side portion and a second half side portion, wherein the first half side portion and the second half side portion are detachably fastened together by a fastener.

8. The optical imaging system of a spotlight according to claim 1, characterized in that: The lens is an aspherical lens, a plano-convex lens, and a surface of the lens facing the light source is a plane.

9. The optical imaging system of a spotlight according to claim 1, characterized in that: The reflector is provided with a first connecting portion at one end facing the lens, wherein the first connecting portion is formed with an annular groove, and one end of the lens fits into the groove; The optical imaging system of the spotlight further comprises a pressing member, which is annular and has a central hole. The pressing member is sleeved on the outer side of the lens through the central hole. The pressing member is tightly connected to the first connecting portion, and the edge of the central hole abuts against the outer side wall of the lens. The pressing piece is a hard plastic pressing piece.

10. A spotlight, characterized in that: An optical imaging system comprising the spotlight according to any one of claims 1 to 9.

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