Optical filter, optical filter plate and lamp capable of alleviating the problem of reflected light from light source

Abstract

A filter, a filter plate and a lamp capable of alleviating the problem of light reflection from a light source, comprising a light incident surface and a light emitting surface, wherein the light emitting surface is a plane and characterized in that the reflection of the incident light by the light incident surface is a curved mirror reflection or a diffuse reflection.

Description

Technical Field

[0001] The utility model relates to the technical field of stage lamps, and more specifically to a filter, a filter plate and a lamp capable of alleviating the problem of light reflection from a light source. Background Art

[0002] The core components of stage lighting fixtures include light sources, reflectors, and color plates. The light source generates a strong light beam through the reflector, and the color plate is responsible for rendering the color of the light beam. To ensure the best rendering effect, the color plate is often placed near the light source. The light emitted by the light source generates a strong light beam through the reflector, and the light beam passes through the color plate to form a colorful beam effect. When the light beam passes through the color plate, part of the light is reflected onto the light source, causing the temperature on the light source to be too high, affecting the service life of the light source. In the existing technology, most of the solutions are to use tilted color plates, but tilted color plates will cause the color plate to occupy a lot of space and cannot be applied to small lamps. Summary of the invention

[0003] The utility model provides a filter, a filter plate and a lamp which can alleviate the problem of light reflection from a light source, thereby reducing the light reflected on the light source and preventing the light source from being burned out due to excessive temperature.

[0004] In order to solve the above problems, the utility model adopts the following solutions:

[0005] On the one hand, the technical solution adopted by the utility model is a filter that can reduce the problem of light reflection from a light source, including a light incident surface and a light emitting surface, the light emitting surface is a plane, and the reflection of the incident light by the light incident surface is a curved mirror reflection or diffuse reflection.

[0006] As a further improvement of the utility model, the light incident surface is provided with a color coating film.

[0007] As a further improvement of the utility model, the incident light is reflected by a curved mirror, and the incident surface is an undulating water-ripple mirror.

[0008] As a further improvement of the utility model, the light incident surface that reflects the incident light as diffuse reflection is a water pattern frosted surface, and the water pattern frosted surface is a water pattern mirror surface that is frosted.

[0009] As a further improvement of the utility model, the light incident surface which reflects the incident light as diffuse reflection is a frosted surface.

[0010] As a further improvement of the utility model, the curvature radius of the water ripple mirror is 15 mm to 50 mm.

[0011] As a further improvement of the present invention, the filter is in the shape of a sector or a rectangle.

[0012] As a further improvement of the utility model, the filter is made of optical glass.

[0013] In a second aspect, the utility model provides a filter plate, comprising a plurality of filters of any one of the above items that can reduce the problem of light reflected from a light source, and the outer circumference of the filter plate is provided with a plurality of evenly distributed light holes for supporting and installing the filters.

[0014] In a third aspect, the utility model also provides a lamp, comprising the above-mentioned filter disk, and also comprising a light source assembly and a light output lens, wherein the filter disk is rotatably arranged on the main light path between the light source assembly and the light output lens and is perpendicular to the main optical axis. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the optical path of a traditional filter.

[0016] Figure 2 FIG. 1 is a schematic diagram of the optical path of the first embodiment.

[0017] Figure 3 FIG. 1 is a schematic diagram of a light incident surface of the first embodiment.

[0018] Figure 4 It is a partial schematic diagram of the light incident surface of the first embodiment.

[0019] Figure 5 FIG. 1 is a schematic diagram of the optical path of the second embodiment.

[0020] Figure 6 FIG. 1 is a schematic diagram of a light incident surface of the second embodiment.

[0021] Figure 7 It is a partial schematic diagram of the light incident surface of the second embodiment.

[0022] Figure 8 Schematic diagram of the optical path of the third embodiment.

[0023] Fig. 9 This is a schematic diagram of the light incident surface of the third embodiment.

[0024] Fig.10 It is a partial schematic diagram of the light incident surface of the third embodiment.

[0025] Fig.11 This is a schematic diagram of the lamp assembly.

[0026] In the figure:

[0027] Light incident surface 1; water pattern mirror surface 11; curved surface 111; water pattern frosted surface 12; frosted plane 13; light exiting surface 2; filter 3; incident light 41; outgoing light 42; reflected light 43; normal line 44; filter plate 5; light hole 51; light source assembly 6; light source 61; light exit lens 7; main optical axis 8; motor 9; lamp 10. DETAILED DESCRIPTION

[0028] Embodiment 1

[0029] The utility model is described in detail below in conjunction with the accompanying drawings.

[0030] Combined with Figure 2 Attached Figure 3 , a filter that can reduce the problem of light reflection from a light source, comprising a light incident surface 1 and a light emitting surface 2, wherein the light emitting surface 2 is a smooth plane, and the light incident surface 1 reflects incident light 41 as a curved mirror reflection or diffuse reflection. Figure 1 As shown, the use of ordinary filters will cause more incident light to be reflected onto the light source 61, causing the light source 61 to overheat and burn out. Therefore, the utility model provides a filter 3, whose light output surface 2 is a smooth plane, and the light input surface 1 is a non-smooth plane with a microstructure. The light input surface 1 has one or more microstructures that can produce curved mirror reflection or diffuse reflection. The beneficial effect of this embodiment is that the design of the microstructure of the light input surface 1 greatly reduces the light reflected onto the light source 61, solving the problem of the light source 61 overheating and then burning out caused by the reflected light from the light source.

[0031] As a new implementation method, combined with the Figure 3 , the surface of the light incident surface 1 of the filter 3 is coated with a color film. The filter 3 should be installed at the position closest to the light source 61 so that the light beam passes through the filter 3 to form a better rendering effect. The surface of the light incident surface 1 of the filter 3 can also be coated with films of different colors, so as to render the light beam into different color effects. The beneficial effect of this embodiment is that the filter 3 can render the light beam into a desired color and form a variety of light beam effects by coating the surface of the light incident surface 1 with color films of different colors; the color film coated on the filter 3 has the characteristics of high temperature resistance, and will not melt or have other adverse reactions even under the irradiation of high-energy light beams; after being coated with the color film, the filter 3 still maintains high light transmittance, ensuring that the light beam can efficiently pass through the filter 3 to form an ideal rendering effect.

[0032] As a new implementation method, combined with the Figure 2 To Attachment Figure 4, the light incident surface 1 is an undulating water ripple mirror surface 11, and the water ripple mirror surface 11 is used to perform curved mirror reflection on the incident light 41. The water ripple mirror surface 11 is composed of a plurality of undulating curved surfaces 111, each curved surface 111 presents a unique wavy or undulating contour, and the water ripple mirror surface 11 is smooth. A portion of the incident light 41 emitted from the light source 61 is transmitted through the filter 3 to form a unique water ripple light spot; but a portion of the incident light 41 is still reflected by the light incident surface 1 of the filter 3. Since the reflection of the incident light 41 on the water ripple mirror surface 11 is the reflection of the light on the smooth curved surface 111, that is, curved mirror reflection. The beneficial effect of this embodiment is that, according to the law of reflection, the incident angle α of the reflected light 43 is the same as the reflection angle β. As shown in the attached figure Figure 1 As shown, since the light incident surface 1 of the ordinary filter 3 is a smooth plane, the incident angle α is small, and the reflection angle β is equal to the incident angle α, most of the incident light 41 will be reflected and concentrated on the light source 61; while the utility model adopts a water ripple mirror 11. Compared with the incident angle α of the ordinary filter, the microstructure of the light incident surface 1 makes the incident angle α larger, and the normal 44 of the incident light 41 is perpendicular to the tangent of the curved surface 11 of the water ripple mirror 11, and the reflection angle β is equal to the incident angle α; that is, the reflection of part of the incident light 41 on the water ripple mirror 11 will change the reflection direction due to the microstructure, so that the reflected light 43 reflected to the light source 61 is greatly reduced, which effectively solves the problem of overheating and burning of the light source 61 caused by the reflected light from the light source.

[0033] Based on the above content, in this embodiment, combined with the attached Figure 2 and attached Figure 3 , the radius of curvature of the water ripple mirror 11 is 15mm to 50mm, and the curvature and the radius of curvature are reciprocal of each other. The curvature of the water ripple mirror 11 determines the degree of curvature of the curved surface 111 of the water ripple mirror 11; the higher the curvature, the greater the degree of curvature of the curved surface 111 of the water ripple mirror 11. Therefore, the curvature of the water ripple mirror 11 is closely related to the reflection direction of the light. The higher the curvature, the greater the degree of curvature of the curved surface 111, and the greater the incident angle α. The reflection angle β is equal to the incident angle α, so the reflected light 43 is more divergent. Since the surface of the water ripple mirror 11 is an irregular curved surface 111 structure, the reflected light 43 will not diverge according to a uniform curvature, but will present a more complex and random direction. The beneficial effect of this embodiment is that the concentration of the reflected light 43 is reduced and the energy concentrated by the reflected light 43 is weakened; the reflected light 43 diverges to the surroundings, which greatly reduces the reflected light 43 that is reflected and concentrated on the light source 61.

[0034] As a new implementation method, combined with the Figure 3, the shape of the filter 3 is sector-shaped or rectangular. The beneficial effect of this embodiment is that, in this embodiment, the filter 3 is designed with two shapes to adapt to two different installation methods. One of them is installed on the rotating filter disk 5. At this time, the filter 3 is sector-shaped, which can better fit the annular structure of the installation part of the filter disk 5. The other is installed on a translational mechanism. At this time, the shape of the filter 3 is rectangular, which is more in line with the motion characteristics of the translational mechanism and saves more space. It can be understood that the filter 3 can also be other shapes.

[0035] As a new implementation method, combined with the Figure 3 The material of the filter 3 is optical glass. Its refractive index is 1.4 to 1.75. The beneficial effect of this embodiment is that the optical glass material is used. Since the optical glass has the characteristics of high light transmittance, high temperature resistance and chemical resistance, it has significant advantages over traditional materials and can better adapt to complex working environment conditions.

[0036] Embodiment 2

[0037] Combined with Figure 5 Attached Figure 6 , a filter that can reduce the problem of light reflection from a light source, comprising a light incident surface 1 and a light emitting surface 2, wherein the light emitting surface 2 is a smooth plane, and the light incident surface 1 reflects incident light 41 as a curved mirror reflection or diffuse reflection. Figure 1 As shown, using an ordinary filter 3 will cause most of the incident light 41 to be reflected onto the light source 61, causing the light source 61 to overheat and burn out. Therefore, the filter 3 provided by the utility model has a light-emitting surface 2 that is a smooth plane, and a light-entering surface 1 that is a non-smooth plane with a microstructure. The light-entering surface 1 has one or more microstructures that can produce curved mirror reflection or diffuse reflection. The beneficial effect of this embodiment is that the design of the microstructure of the light-entering surface 1 greatly reduces the light reflected onto the light source 61, solving the problem of the light source 61 overheating and then burning out due to the reflected light from the light source.

[0038] As a new implementation method, combined with the Figure 6, the surface of the light incident surface 1 of the filter 3 is coated with a color film. The filter 3 should be installed at the position closest to the light source 61 so that the light beam passes through the filter 3 to form a better rendering effect. The surface of the light incident surface 1 of the filter 3 can also be coated with films of different colors, so as to render the light beam into different color effects. The beneficial effect of this embodiment is that the filter 3 can render the light beam into a desired color and form a variety of light beam effects by coating the surface of the light incident surface 1 with color films of different colors; the color film coated on the filter 3 has the characteristics of high temperature resistance, and will not melt or have other adverse reactions even under the irradiation of high-energy light beams; after being coated with the color film, the filter 3 still maintains high light transmittance, ensuring that the light beam can efficiently pass through the filter 3 to form an ideal rendering effect.

[0039] As a new implementation method, combined with the Figure 2 To Attachment Figure 4 , the light incident surface 1 is an undulating water ripple mirror surface 11, and the water ripple mirror surface 11 is used to perform curved mirror reflection on the incident light 41. The water ripple mirror surface 11 is composed of a plurality of undulating curved surfaces 111, each curved surface 111 presents a unique wavy or undulating contour, and the water ripple mirror surface 11 is smooth. A portion of the incident light 41 emitted from the light source 61 is transmitted through the filter 3 to form a unique water ripple light spot; but a portion of the incident light 41 is still reflected by the light incident surface 1 of the filter 3. Since the reflection of the incident light 41 on the water ripple mirror surface 11 is the reflection of the light on the smooth curved surface 111, that is, curved mirror reflection. The beneficial effect of this embodiment is that according to the law of reflection: the incident angle α of the reflected light 43 is the same as the reflection angle β. Most of the light emitted by the light source 61 is perpendicular to the horizontal plane. As shown in the attached figure Figure 1 As shown, since the light incident surface 1 of the ordinary filter 3 is a smooth plane, the incident angle α is small, and the reflection angle β is equal to the incident angle α, most of the incident light 41 will be reflected and concentrated on the light source 61; while the utility model adopts a water ripple mirror 11. Compared with the incident angle α of the ordinary filter, the microstructure of the light incident surface 1 makes the incident angle α larger, and the normal 44 of the incident light 41 is perpendicular to the tangent of the curved surface 11 of the water ripple mirror 11, and the reflection angle β is equal to the incident angle α; that is, the reflection of part of the incident light 41 on the water ripple mirror 11 will change the reflection direction due to the microstructure, which greatly reduces the reflected light 43 reflected to the light source 61.

[0040] Based on the above content, in this embodiment, combined with the attached Figure 5 To Attachment Figure 7, the light incident surface for diffuse reflection of the incident light 41 is the water pattern frosted surface 12, and the water pattern frosted surface 12 is frosted by the water pattern mirror surface 11. The water pattern frosted surface 12 is composed of a plurality of undulating curved surfaces 111, and its surface is also frosted. That is, the filter 3 can not only utilize the characteristics of the water pattern mirror surface 11 to make the reflected light 43 diverge, but also the frosting further enhances the scattering effect of the reflected light 43. The beneficial effect of this embodiment is that the undulating microstructure of the water pattern frosted surface 12 changes the direction of the reflected light 43, and its frosted microstructure further makes the reflection of the reflected light 43 more divergent. At this time, the directionality of the reflected light 43 is weak, and it is scattered in multiple directions, which greatly reduces the reflected light 43 that is reflected and concentrated on the light source 61. And the energy of the reflected light 43 is further weakened, so that the temperature will not be too high when it is reflected at a position other than the light source 61.

[0041] Based on the above content, in this embodiment, combined with the attached Figure 5 and attached Figure 6 , the radius of curvature of the water ripple mirror 11 is 15mm to 50mm, and the curvature and the radius of curvature are reciprocal of each other. The curvature of the water ripple mirror 11 determines the degree of curvature of the curved surface 111 of the water ripple mirror 11; the higher the curvature, the greater the degree of curvature of the curved surface 111 of the water ripple mirror 11. Therefore, the curvature of the water ripple mirror 11 is closely related to the reflection direction of the light. The higher the curvature, the greater the degree of curvature of the curved surface 111, and the greater the incident angle α. The reflection angle β is equal to the incident angle α, so the reflected light 43 is more divergent. Since the surface of the water ripple mirror 11 is an irregular curved surface 111 structure, the reflected light 43 will not diverge according to a uniform curvature, but will present a more complex and random direction. The beneficial effect of this embodiment is that the concentration of the reflected light 43 is reduced and the energy concentrated by the reflected light 43 is weakened; the reflected light 43 diverges to the surroundings, which greatly reduces the reflected light 43 that is reflected and concentrated on the light source 61.

[0042] As a new implementation method, combined with the Figure 6 , the shape of the filter 3 is sector-shaped or rectangular. The beneficial effect of this embodiment is that, in this embodiment, the filter 3 is designed with two shapes to adapt to two different installation methods. One of them is installed on the rotating filter disk 5. At this time, the filter 3 is sector-shaped, which can better fit the annular structure of the installation part of the filter disk 5. The other is installed on a translational mechanism. At this time, the shape of the filter 3 is rectangular, which is more in line with the motion characteristics of the translational mechanism and saves more space. It can be understood that the filter 3 can also be other shapes.

[0043] As a new implementation method, combined with the Figure 6The material of the filter 3 is optical glass. Its refractive index is 1.4 to 1.75. The beneficial effect of this embodiment is that the optical glass material is used. Since the optical glass has the characteristics of high light transmittance, high temperature resistance and chemical resistance, it has significant advantages over traditional materials and can better adapt to complex working environment conditions.

[0044] Embodiment 3

[0045] Combined with Figure 8 and attached Fig. 9 , a filter that can reduce the problem of light reflection from a light source, comprising a light incident surface 1 and a light emitting surface 2, wherein the light emitting surface 2 is a smooth plane, and the light incident surface 1 reflects incident light 41 as a curved mirror reflection or diffuse reflection. Figure 1 As shown, the use of an ordinary filter 3 will cause more incident light 41 to be reflected onto the light source 61, causing the light source 61 to overheat and burn out. Therefore, the filter 3 provided by the utility model has a light-emitting surface 2 that is a smooth plane, and a light-entering surface 1 that is a non-smooth plane with a microstructure. The light-entering surface 1 has one or more microstructures that can produce curved mirror reflection or diffuse reflection. The beneficial effect of this embodiment is that the design of the microstructure of the light-entering surface 1 greatly reduces the light reflected onto the light source 61, solving the problem of the light source 61 overheating and then burning out due to the reflected light from the light source.

[0046] As a new implementation method, combined with the Fig. 9 , the surface of the light incident surface 1 of the filter 3 is coated with a color film. The filter 3 should be installed at the position closest to the light source 61 so that the light beam passes through the filter 3 to form a better rendering effect. The surface of the light incident surface 1 of the filter 3 can also be coated with films of different colors, so as to render the light beam into different color effects. The beneficial effect of this embodiment is that the filter 3 can render the light beam into a desired color and form a variety of light beam effects by coating the surface of the light incident surface 1 with color films of different colors; the color film coated on the filter 3 has the characteristics of high temperature resistance, and will not melt or have other adverse reactions even under the irradiation of high-energy light beams; after being coated with the color film, the filter 3 still maintains high light transmittance, ensuring that the light beam can efficiently pass through the filter 3 to form an ideal rendering effect.

[0047] As a new implementation method, combined with the Figure 8 To Attachment Fig.10 , the incident light 41 is reflected by diffuse reflection, and the incident surface 1 is a frosted surface 13. Figure 1As shown, the light incident surface 1 of the ordinary filter 3 is a smooth plane, so most of the incident light 41 will be directly reflected onto the light source 61, causing the light source 61 to overheat and burn out. The utility model adopts a frosted plane 13, whose surface is rough and has many tiny protrusions and depressions. The reflection of the incident light 41 on the frosted plane 13 is diffuse reflection, and its reflection direction is irregular and weakly directional compared to its reflection on a smooth plane. Therefore, it is difficult for the reflected light 43 to be gathered into a light beam, so the energy of the diffusely reflected reflected light 43 is relatively weak. The beneficial effect of this embodiment is that, since the light incident surface 1 is a rough frosted plane 13, part of the incident light 41 is irregularly reflected, which greatly reduces the light reflected onto the light source 61. And since the energy of the reflected light 43 is relatively weak, the temperature at the light source 61 is also within a controllable range.

[0048] As a new implementation method, combined with the Fig. 9 , the shape of the filter 3 is sector-shaped or rectangular. The beneficial effect of this embodiment is that, in this embodiment, the filter 3 is designed with two shapes to adapt to two different installation methods. One of them is installed on the rotating filter disk 5. At this time, the filter 3 is sector-shaped, which can better fit the annular structure of the installation part of the filter disk 5. The other is installed on a translational mechanism. At this time, the shape of the filter 3 is rectangular, which is more in line with the motion characteristics of the translational mechanism and saves more space. It can be understood that the filter 3 can also be other shapes.

[0049] As a new implementation method, combined with the Fig. 9 The material of the filter 3 is optical glass. Its refractive index is 1.4 to 1.75. The beneficial effect of this embodiment is that the optical glass material is used. Since the optical glass has the characteristics of high light transmittance, high temperature resistance and chemical resistance, it has significant advantages over traditional materials and can better adapt to complex working environment conditions.

[0050] In summary, combined with the Fig.11A filter plate 5 includes a filter 3 that can reduce the problem of light reflection from a light source, and the outer circumference of the filter plate 5 is provided with a plurality of evenly distributed light holes 51 for supporting and installing the filter 3. The filter plate 5 is a disc-shaped structure, and the filter 3 is generally installed on the outer circumference of the filter plate 5. The light entrance surface 1 of the filter 3 is close to the light source 61, and the light exit surface 2 is far away from the light source. In addition, a plurality of filters 3 are covered on a plurality of evenly distributed through holes 51 for supporting and installing the filters, and the plurality of through holes 51 can be covered with filters 3 of different colors, presenting a richer light spot effect. In this embodiment, the through holes 51 of the filter plate 5 can selectively install the filter 3. When the filter 3 is not installed on the through hole 51, the light passes directly; however, when the filter 3 is installed on the through hole 51, the color of the light passing through will be changed. It can be understood that other types of sheet-like objects, such as heat insulation sheets, can also be installed on the through hole 51. The beneficial effect of this embodiment is that the filter plate 5 can be installed with filters 3 of different colors or types to achieve richer light spot effects or have multiple functions.

[0051] In summary, combined with the Fig.11 A lamp 10 includes a filter disc 5, a light source assembly 6 and a light output lens 7. The filter disc 5 is rotatably arranged on the main light path between the light source assembly 6 and the light output lens 7 and is perpendicular to the main optical axis 8. The filter disc 5 and the light source assembly 6 are installed inside the lamp 10. The light hole 51 of the filter disc 5 is located between the light source assembly 6 and the light output lens 7, and the center of the light hole 51 overlaps with the main optical axis 8. The filter disc 5 is rotatable and driven to rotate by a motor 9 installed below it. Filters 3 of different colors or different functions can be switched according to different needs. The traditional device for reducing the reflected light of the light source adopts the method of tilting the filter or folding the filter. Although this device can effectively reduce the problem of reflected light from the light source, it occupies a large space and is not suitable for lamps with smaller volumes. The filter disc 5 of the utility model is perpendicular to the main optical axis 8, and because the filter 3 is a flat plate, the filter disc 5 occupies a small space. The beneficial effect of this embodiment is that the filter plate 5 which occupies a small space can be applied to lamps 10 of different volumes, and the filter 3 installed on the filter plate 5 can effectively alleviate the problem of light reflected from the light source.

Claims

1. A filter capable of alleviating the problem of light reflection from a light source, comprising a light incident surface and a light emitting surface, wherein the light emitting surface is a plane, characterized in that: The reflection of the incident light by the light incident surface is curved mirror reflection or diffuse reflection.

2. The filter capable of alleviating the problem of light source reflection according to claim 1, characterized in that: The light incident surface is provided with a color coating film.

3. The filter capable of alleviating the problem of light source reflection according to claim 1, characterized in that: The reflection of the incident light is a curved mirror reflection, and the incident surface is an undulating water-ripple mirror surface.

4. The filter capable of alleviating the problem of light source reflection according to claim 3, characterized in that: The light incident surface that reflects the incident light as diffuse reflection is a water pattern frosted surface, and the water pattern frosted surface is the surface of the water pattern mirror that has been frosted.

5. The filter capable of alleviating the problem of light reflection from a light source according to claim 1, characterized in that: The light incident surface which reflects the incident light as diffuse reflection is a frosted surface.

6. The filter capable of alleviating the problem of light reflected from a light source according to claim 3 or 4, characterized in that: The curvature radius of the water ripple mirror is 15 mm to 50 mm.

7. The filter capable of alleviating the problem of light source reflection according to claim 1, characterized in that: The filter is in the shape of a sector or a rectangle.

8. The filter capable of alleviating the problem of light source reflection according to claim 1, characterized in that: The filter is made of optical glass.

9. A filter disc, characterized in that: It comprises a plurality of filters capable of alleviating the problem of light reflected from a light source as described in any one of claims 1 to 8, wherein the outer circumference of the filter disk is provided with a plurality of evenly distributed light-through holes for supporting and installing the filters.

10. A lamp, characterized in that: It comprises a filter disk as described in claim 9, and also comprises a light source assembly and a light output lens, wherein the filter disk is rotatably arranged on the main light path between the light source assembly and the light output lens and is perpendicular to the main optical axis.

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