Optical system with high-temperature-resistant effect module and stage lamp with optical system
By using high-reflectivity effect components and diffuse reflection surfaces in the stage lighting effect module, the problems of module deformation and cracking under high temperature were solved, achieving stable operation and long lifespan in high-temperature environments.
Patent Information
- Application Number
- CN202520174095.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-25
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-01-25
AI Technical Summary
Existing stage lighting effect modules are prone to deformation and cracking when exposed to high-temperature beams for extended periods, resulting in a shortened lifespan.
An effect module with at least 70% reflectivity is used, including effect components, lens modules and light-emitting lenses. The light-facing surface of the effect components reflects most of the light beam and reflects the rest to other locations. Combined with rough surface diffuse reflection and heat dissipation layer, light concentration is reduced and high temperature resistance is enhanced.
Maintaining the ideal operating temperature of the components in high-temperature environments extends their service life, reduces noise and module size, improves heat dissipation efficiency, and avoids damage caused by concentrated light.
Smart Images
Figure CN223924597U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of stage lighting technology, and more specifically, to an optical system with a high-temperature resistant module and a stage light having the same. Background Technology
[0002] A multi-functional stage light integrates a rich array of lighting effects. Various effect modules within the light body intercept the light beam, which is then projected onto a target plane through a lens module, enhancing the atmosphere and creating unique stage effects. With the increasing market demand for high-power stage lights, designers are increasingly choosing high-power LEDs and laser light sources. However, this leads to the problem of the high temperatures generated by the beam affecting the effect modules. When in operation, the effect modules are exposed to the high-temperature beam, and existing materials are prone to deformation and even cracking due to prolonged heat exposure. Utility Model Content
[0003] To overcome at least one of the defects described in the prior art, this utility model provides an optical system with a high-temperature resistant effect module and a stage light with the same, solving the problem of damage to effect components caused by long-term exposure to high-temperature beams.
[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an optical system with a high-temperature resistant effect module and a stage light having the same, wherein the optical system with a high-temperature resistant effect module includes a light source that emits a light beam, and at least one effect module, a lens module and a light-emitting lens arranged sequentially along the emission direction of the light beam; the effect module includes at least a portion of an effect component that can selectively cut into and intercept the light beam to produce a light effect, the side of the effect component near the light source is a light-facing surface, and the reflectivity of the light-facing surface is at least 70%.
[0005] When the effect component operates within the beam, a portion of the beam passes through the effect area of the component and enters the lens module, ultimately being projected onto the target plane by the light-emitting lens. The reflectivity of the light-facing surface of the effect component is at least 70%. Most of the beam blocked by the effect component is promptly reflected to other locations by the light-facing surface, preventing excessive light concentration and continuous heating of the effect component. This enhances the high-temperature resistance of the effect component, allowing it to maintain an ideal operating temperature even in high-temperature environments, ensuring its operational accuracy and service life. Simultaneously, by adopting this solution, the number of cooling fans is reduced while still meeting the heat dissipation requirements of the effect module, thereby reducing noise and effectively decreasing the overall size of the effect module.
[0006] Furthermore, the surface of the light-facing surface is configured as a rough surface that diffusely reflects the light beam. The light-facing surface can diffusely reflect the received light beam from multiple angles to various locations, effectively preventing the light from being reflected and then refocusing in one place.
[0007] Furthermore, the effect module is a pattern disc, and the effect component is a pattern piece; and / or the effect module is a fire disc assembly, and the effect component is a dynamic fire disc; and / or the effect module is an aperture assembly, and the effect component is an aperture piece. When the effect module is a pattern disc, the pattern piece cuts into the light beam and intercepts it, so that a light spot displaying a specific pattern is projected onto the target plane through the light-emitting lens; when the effect module is a fire disc assembly, the dynamic fire disc rotates at least partially to cut into the light beam and intercept it, presenting a vivid pattern effect, such as a flame effect or a water flow effect; when the effect module is the aperture assembly, several aperture pieces combine with each other to form light-transmitting holes with different apertures, thereby adjusting the size of the light spot and helping to achieve more complex light and shadow effects in different scenes.
[0008] Furthermore, the effect component includes a substrate and a reflective layer disposed on the substrate near the light source, wherein the reflective layer near the light source is a light-facing surface. By independently configuring the reflective layer, it is easy to process.
[0009] Furthermore, the thickness of the reflective layer ranges from 10 μm to 100 μm. Using this thickness range effectively avoids situations where the reflective layer is too thin, affecting its reflectivity, or too thick, resulting in poor imaging performance.
[0010] Furthermore, the substrate is made of metal or ceramic. Based on this design, the light-receiving surface reflects most of the light into other spaces inside the stage lamp for heat dissipation, so the high-temperature resistance requirements for the substrate are not too high; therefore, lower-cost and easier-to-process materials can be selected.
[0011] Furthermore, it also includes a flexible adhesive layer located between the substrate and the reflective layer. Due to the difference in thermal expansion properties between the substrate and the reflective layer, the flexible adhesive layer provides a buffer to facilitate the expansion of the substrate and the reflective layer during high-temperature operation.
[0012] Furthermore, it also includes a heat dissipation layer with an infrared emissivity of at least 85%, the heat dissipation layer being disposed on the side of the substrate away from the light source. This arrangement enhances the heat dissipation effect of the effect element on the side away from the light source, helps to quickly reduce the temperature on the substrate, reduces reliance on active cooling devices such as fans, thereby reducing power consumption and noise.
[0013] Furthermore, the reflectivity of the light-facing surface is greater than 80%. This high reflectivity significantly reduces light concentration on the light-facing surface of the effect component, further enhancing its high-temperature resistance.
[0014] Furthermore, the side of the effect element away from the light source is a backlight surface, and the gloss level of the backlight surface is less than 5 GU. During use, there is a possibility that external light enters from the light-emitting lens and is reflected on the backlight surface of the effect element, forming glare. By setting the backlight surface to a specific gloss level, the generation of glare is effectively reduced, ensuring the imaging effect of the optical system.
[0015] Furthermore, the effect module is a cutting assembly, and the effect component is a cutting blade. The cutting assembly is positioned close to the focal point of the light beam. The cutting assembly includes a mounting plate with a light-transmitting hole, at least three cutting blades arranged around the light-transmitting hole, and a driving module that drives the cutting blades to cut into or out of the light-transmitting hole. By combining multiple cutting blades at multiple angles, the light beam is blocked and cut to form light spots of various shapes, enriching the light spot effect of the optical system.
[0016] Furthermore, the beam is conical, and several cutting blades are located on the side of the mounting plate near the light source. The cutting assembly also includes a white disc with a first perforated hole, and a separator for restricting the movement of the cutting blades in a direction perpendicular to their plane. The white disc is located on the side of the separator near the light source and is situated on the imaging plane of the beam. The separator has a second perforated hole through which the beam passes, and the opening area of the second perforated hole is 97% to 120% of the cross-sectional area of the beam passing through it. Restricting the opening area of the second perforated hole can prevent the separator from excessively cutting into the beam and forming an image, and can also effectively block and absorb the light reflected from the light-facing surface of the cutting blade, preventing this light from being reflected back to the white disc and then reflected again into the beam to form stray light.
[0017] This utility model also provides a stage light, including a lamp head with a light outlet and any of the aforementioned optical systems. The optical system is located inside the lamp head, the light source is installed inside the lamp head at the end away from the light outlet, and the light-emitting lens covers the light outlet. Using the optical system of this solution, the light-facing surface of the effect component can reflect the excessively hot light beam, reflecting the light to various parts inside the lamp head, thus distributing the temperature evenly within the lamp body. Simultaneously, the light is dissipated to the outside through the sidewalls of the lamp head, achieving a good heat dissipation effect. When the power of the light source is high, the effect module with good high-temperature resistance in this solution can operate normally in the light beam generated when the light source is operating at full power, breaking the previous predicament of needing to reduce the power of the light source. Attached Figure Description
[0018] Figure 1 This is a cross-sectional structural diagram of the effect component described in this utility model.
[0019] Figure 2 This is a schematic diagram of the internal structure of the lamp head equipped with the aforementioned high-temperature resistant module.
[0020] Figure 3 yes Figure 2 A magnified schematic diagram of part A in the middle.
[0021] Figure 4 This is an exploded structural diagram of the cutting assembly.
[0022] In the picture:
[0023] 100. Light source; 110. Beam; 200. Effect module; 210. Effect component; 211. Light-facing surface; 212. Backlight surface; 221. Reflective layer; 222. Flexible adhesive layer; 223. Substrate; 224. Heat dissipation layer; 300. Lens module; 400. Light-emitting lens; 500. Drive module; 600. Cutting assembly; 610. Mounting plate; 611. Light-transmitting hole; 620. Cutting disc; 630. White disc; 631. First cutout hole; 640. Separator; 650. Second cutout hole; 660. Drive arm; 700. Lamp head; 710. Light outlet; 720. Cooling fan; 800. Heat sink. Detailed Implementation
[0024] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.
[0025] like Figures 2 to 3 As shown, an optical system with a high-temperature resistant effect module and a stage light having the same are disclosed. The optical system with the high-temperature resistant effect module 200 includes a light source 100 that emits a light beam 110, and at least one effect module 200, a lens module 300, and a light-emitting lens 400 arranged sequentially along the emission direction of the light beam 110. The effect module 200 includes an effect element 210 that can selectively cut into and intercept the light beam 110 to produce a light effect. The side of the effect element 210 closest to the light source 100 is a light-facing surface 211, and the reflectivity of the light-facing surface 211 is at least 70%.
[0026] When the effect element 210 operates within the beam 110, a portion of the beam 110 passes through the effect area of the effect element 210 and enters the lens module 300, ultimately being projected onto the target plane by the light-emitting lens 400. The reflectivity of the light-facing surface 211 of the effect element 210 is at least 70%. Most of the portion of the beam 110 blocked by the effect element 210 is promptly reflected to other positions by the light-facing surface 211, preventing excessive light concentration on the effect element 210 and subsequent heating. This enhances the high-temperature resistance of the effect element 210, allowing it to maintain an ideal operating temperature in high-temperature environments, ensuring its operational accuracy and service life. Simultaneously, by adopting this solution, the effect module 200 can still meet heat dissipation requirements even after reducing the number of cooling fans 720, thereby reducing noise and effectively decreasing the overall size of the effect module 200.
[0027] Preferably, in order to achieve clear light spot imaging, the effect module 200 is positioned close to the focal point of the light beam 110.
[0028] Preferably, the lens module 300 is a magnifying lens assembly or a focusing lens assembly.
[0029] Preferably, the surface of the light-facing surface 211 is coated with an antioxidant coating with a visible light transmittance greater than 95%, which further isolates oxygen and effectively reduces the wear and corrosion of the effect component 210.
[0030] Preferably, the system further includes a drive module 500 for driving the effect element 210 to enter or exit the beam 110. Operators can selectively drive the effect element 210 to enter or exit the beam 110 using the drive module 500 as needed, providing flexible control.
[0031] Preferably, the drive module 500 includes a motor that provides driving force.
[0032] In a preferred embodiment of this invention, the surface of the light-facing surface 211 is configured as a rough surface that diffusely reflects the light beam 110. The light-facing surface 211 can diffusely reflect the received light beam 110 from multiple angles to various locations, effectively preventing the light from being reflected and then refocusing in one place.
[0033] In other embodiments of this utility model, the light-facing surface 211 is a smooth surface, which can also reflect light and prevent excessive light from accumulating and being absorbed on the surface of the effect member 210.
[0034] In a preferred embodiment of this utility model, the effect module 200 is a pattern disc, and the effect component 210 is a pattern sheet; and / or the effect module 200 is a fire disc assembly, and the effect component 210 is a dynamic fire disc; and / or the effect module 200 is an aperture assembly, and the effect component 210 is an aperture sheet. When the effect module 200 is a pattern disc, the pattern sheet cuts into the light beam 110 and intercepts it, so that a light spot with a specific pattern is projected onto the target plane through the light-emitting lens 400; when the effect module 200 is a fire disc assembly, the dynamic fire disc rotates at least partially to cut into the light beam 110 and intercept it, presenting a vivid pattern effect, such as a flame effect or a water flow effect; when the effect module 200 is the aperture assembly, several aperture sheets are combined to form light-transmitting holes with different apertures, thereby adjusting the size of the light spot and controlling the brightness of the light beam 110, which helps to achieve more complex light and shadow effects in different scenes.
[0035] Preferably, when the effect module 200 is a pattern disk or a fire disk, the effect component 210 has a ground effect area for part of the light beam 110 to pass through and a non-effect area for blocking part of the light beam 110. The reflectivity of the non-effect area corresponding to the light-facing surface 211 is then set to be greater than or equal to 70%, while the transmittance of the effect area is at a normal value. This does not affect the light effect and effectively improves the high-temperature resistance of the effect component 210. When the effect module 200 is an aperture assembly or a cutting assembly 600, the effect component 210 mainly adjusts the size and shape of the light spot by blocking light. Therefore, the reflectivity of the light-facing surface 211 of such effect components 210 is set to at least 70%.
[0036] like Figures 1 to 3 As shown, in a preferred embodiment of this utility model, the effect component 210 includes a substrate 223 and a reflective layer 221 disposed on the side of the substrate 223 near the light source 100, wherein the side of the reflective layer 221 near the light source 100 is the light-facing surface 211. By independently setting the reflective layer 221, it is easy to process.
[0037] Alternatively, forming a light-reflecting surface 211 on the surface of the substrate 223 to reflect the light beam 110 can also achieve the basic function.
[0038] Preferably, the reflective layer 221 is made of an organic coating or a nanomaterial coating.
[0039] In a preferred embodiment of this invention, the thickness of the reflective layer 221 ranges from 10 μm to 100 μm. Using this thickness range effectively avoids situations where the reflective layer 221 is too thin, affecting its reflectivity, or too thick, resulting in poor imaging of the effect element 210.
[0040] In a preferred embodiment of this invention, the substrate 223 is made of a metallic or ceramic material. Pure copper, copper alloys, aluminum alloys, nickel-based alloys, or ceramic materials can be selected. Based on this design, the light-receiving surface 211 reflects most of the light into other spaces inside the stage lamp for heat dissipation. Therefore, the high-temperature resistance requirements for the substrate 223 are not too high, and materials that are cheaper and easier to process can be selected.
[0041] Preferably, the substrate 223 is made of copper, which is reasonably priced and has good thermal conductivity.
[0042] As shown in the table below, when the effect module 200 is the cutting component 600, the operating temperatures of the high-temperature resistant cutting component 600 described in this solution and the existing ordinary cutting component 600 are compared. Then, an auxiliary fan is added for heat dissipation. Comparing the four methods, the operating temperatures of the cutting component 600 are as follows:
[0043] Auxiliary fan Ordinary cutting components High-temperature cutting components Fan-assisted heat dissipation 510℃ 130℃ Fanless cooling 670℃ 210℃
[0044] Even without fan-assisted cooling, the high-temperature resistant cutting component 600 (210℃) described in this invention is far superior to the ordinary cutting component 600 (510℃) using fan-assisted cooling. Therefore, this solution effectively solves the heat dissipation problem and reduces the operating temperature of the effect module 200, while also eliminating the need for a fan, saving space and manufacturing costs, and effectively reducing noise. Simultaneously, because this solution achieves effective cooling, the risk of deformation of the substrate 223 used to manufacture the effect component 210 is reduced, reliability is greatly increased, and the deformation resistance requirements of the substrate 223 are lowered, allowing the use of lower-cost materials as alternatives.
[0045] In a preferred embodiment of this invention, a flexible adhesive layer 222 is further included between the substrate 223 and the reflective layer 221. Due to the difference in thermal expansion properties between the substrate 223 and the reflective layer 221, the flexible adhesive layer 222 provides a buffering effect for the expansion of the substrate 223 and the reflective layer 221 during high-temperature operation.
[0046] Preferably, the flexible adhesive layer 222 can be an organic adhesive, and its thickness is preferably 10 μm to 20 μm.
[0047] In a preferred embodiment of this invention, a heat dissipation layer 224 with an infrared emissivity of at least 85% is further included, the heat dissipation layer 224 being disposed on the side of the substrate 223 away from the light source 100. This arrangement enhances the heat dissipation effect of the effect element 210 on the side away from the light source 100, helps to quickly reduce the temperature on the substrate 223, reduces reliance on active cooling devices such as fans, and thus reduces power consumption and noise.
[0048] In a preferred embodiment of this invention, the reflectivity of the light-facing surface 211 is greater than 80%. This higher reflectivity significantly reduces light concentration on the light-facing surface 211 of the effect member 210, further enhancing its high-temperature resistance.
[0049] In a preferred embodiment of this invention, the side of the effect element 210 furthest from the light source 100 is a backlight surface 212, and the gloss level of the backlight surface 212 is less than 5 GU. During use, external light may enter from the light-emitting lens 400 and be reflected onto the backlight surface 212 of the effect element 210, forming glare. Setting the backlight surface 212 to a specific gloss level effectively reduces glare and ensures the imaging effect of the optical system.
[0050] Preferably, the gloss of the backlight surface 212 of the effect component 210 is reduced by spraying black sand (such as by spraying organic resin or inorganic nano paint) or by oxidation blackening treatment, and the lower the gloss, the better the effect.
[0051] Preferably, the heat dissipation layer 224 has a gloss level of 1 GU and a reflectivity of less than 15% in the visible light band, and its thickness is preferably between 5 μm and 30 μm, so as to obtain a more efficient radiative heat dissipation effect.
[0052] like Figure 2 and Figure 4 As shown, in a preferred embodiment of this utility model, the effect module 200 is a cutting component 600, and the effect element 210 is a cutting blade 620. The cutting component 600 is positioned near the focal point of the light beam 110. The cutting component 600 includes a mounting plate 610 with a light-transmitting hole 611, at least three cutting blades 620 arranged around the light-transmitting hole 611, and a driving module 500 for driving the cutting blades 620 to cut into or out of the light-transmitting hole 611. By combining multiple cutting blades 620 at multiple angles, the light beam 110 is shielded and cut, forming light spots of various shapes, thus enriching the light spot effect of the optical system.
[0053] Preferably, the number of cutting blades 620 is four, and they are arranged around the light-transmitting hole 611. The driving module 500 includes a motor that provides driving force and a transmission arm 660 that transmits driving force to the cutting blades 620. Under the drive of the motor and the transmission arm 660, the cutting blades 620 cut into the light-transmitting hole 611 at various specific angles to form light spots with specific shapes.
[0054] In a preferred embodiment of this utility model, the beam 110 is conical, and several cutting blades 620 are located on the side of the mounting plate 610 near the light source 100. The cutting assembly 600 further includes a white circular piece 630 with a first hollow hole 631, and a separator 640 for restricting the movement of the cutting blades 620 in a direction perpendicular to their plane. The white circular piece 630 is located on the side of the separator 640 near the light source 100 and is in the imaging plane of the beam 110. The separator 640 has a second hollow hole 650 through which the beam 110 passes. The opening area of the second hollow hole 650 is 97% to 120% of the cross-sectional area of the beam 110 passing through it. Limiting the opening area of the second perforated hole 650 can prevent the separator 640 from excessively cutting into the light beam 110 and forming an image, and can also effectively block and absorb the light reflected from the light-facing surface 211 of the cutting plate 620, preventing this light from being reflected back to the white disc 630 and then entering the light beam 110 to form stray light. Preferably, the closer the opening area of the second perforated hole 650 is to the lower limit, the better its anti-glare effect.
[0055] Preferably, the opening area of the first perforated hole 631 is smaller than the opening area of the second perforated hole 650.
[0056] Preferably, the inner wall of the first perforated hole 631 is provided with multiple rings of stepped anti-glare structure.
[0057] like Figure 2 , Figure 3As shown, this utility model also provides a stage light, including a lamp head 700 with a light outlet 710 and any of the aforementioned optical systems. The optical system is located inside the lamp head 700, and the light source 100 is installed inside the lamp head 700 at the end away from the light outlet 710. The light-emitting lens 400 covers the light outlet 710. Using the optical system of this solution, the light-facing surface 211 of the effect element 210 can reflect the excessively hot light beam 110, reflecting the light to various parts inside the lamp head 700, thus distributing the temperature evenly inside the lamp body. Simultaneously, the light is dissipated to the outside through the sidewall of the lamp head 700, achieving a good heat dissipation effect. When the power of the light source 100 is high, the effect module 200, which has good high-temperature resistance, can operate normally in the light beam 110 generated when the light source 100 is operating at full power, breaking the previous predicament of needing to reduce the power of the light source 100.
[0058] Preferably, it also includes a cooling fan 720 for agitating the airflow inside the lamp head 700, and a radiator 800 for dissipating the heat inside the lamp head 700 to the outside in a timely manner.
[0059] Preferably, it further includes a support arm for pivoting the lamp head 700 and a housing for pivoting the support arm, the lamp head 700 being rotatable relative to the housing in at least two dimensions.
[0060] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. An optical system with a high-temperature resistant module, characterized in that, The system includes a light source (100) that emits a light beam (110), and at least one effect module (200), a lens module (300), and a light-emitting lens (400) arranged sequentially along the emission direction of the light beam (110); the effect module (200) includes at least a portion of an effect element (210) that can selectively cut into and intercept the light beam (110) to produce a light effect, wherein the side of the effect element (210) closest to the light source (100) is a light-facing surface (211), and the reflectivity of the light-facing surface (211) is at least 70%.
2. The optical system of claim 1, wherein, The surface of the light-facing surface (211) is configured as a rough surface that diffusely reflects the light beam (110).
3. The optical system of claim 1, wherein The effect module (200) is a pattern disc, and the effect component (210) is a pattern piece; and / or the effect module (200) is a fire disc assembly, and the effect component (210) is a dynamic fire disc; and / or the effect module (200) is an aperture assembly, and the effect component (210) is an aperture piece.
4. The optical system of claim 1, wherein, The effect component (210) includes a substrate (223) and a reflective layer (221) disposed on the side of the substrate (223) near the light source (100), wherein the side of the reflective layer (221) near the light source (100) is the light-facing surface (211).
5. The optical system of claim 4, wherein, The thickness of the reflective layer (221) ranges from 10 μm to 100 μm.
6. The optical system of claim 4, wherein, The substrate (223) is made of metal or ceramic material.
7. The optical system according to claim 4, characterized in that, It also includes a flexible adhesive layer (222) located between the substrate (223) and the reflective layer (221).
8. The optical system according to claim 4, characterized in that, It also includes a heat dissipation layer (224) with an infrared emissivity of at least 85%, the heat dissipation layer (224) being disposed on the side of the substrate (223) away from the light source (100).
9. The optical system according to claim 1, characterized in that, The reflectivity of the light-facing surface (211) is greater than 80%.
10. The optical system according to claim 1, characterized in that, The side of the effect component (210) away from the light source (100) is a backlight surface (212), and the gloss of the backlight surface (212) is less than 5 GU.
11. The optical system according to claim 1, characterized in that, The effect module (200) is a cutting component (600), the effect piece (210) is a cutting blade (620), and the cutting component (600) is set near the focal point of the beam (110); the cutting component (600) includes a mounting plate (610) with a light-transmitting hole (611), at least three cutting blades (620) arranged around the light-transmitting hole (611), and a driving module (500) for driving the cutting blades (620) to cut into or out of the light-transmitting hole (611).
12. The optical system according to claim 11, characterized in that, The beam (110) is conical, and several cutting blades (620) are located on the side of the mounting plate (610) near the light source (100). The cutting assembly (600) also includes a white disc (630) with a first perforation (631) and a separator (640) for restricting the movement of the cutting blades (620) in a direction perpendicular to their plane. The white disc (630) is located on the side of the separator (640) near the light source (100) and is on the imaging plane of the beam (110). The separator (640) has a second perforation (650) through which the beam (110) passes. The opening area of the second perforation (650) is 97% to 120% of the cross-sectional area of the beam (110) passing through it.
13. A stage light, characterized in that, The lamp head (700) includes a light outlet (710) and an optical system according to any one of claims 1 to 12, the optical system being located within the lamp head (700), the light source (100) being mounted within the lamp head (700) at one end away from the light outlet (710), and the light-emitting lens (400) covering the light outlet (710).