Optical system with backward-moving gravity center and stage lamp with optical system

Abstract

The invention discloses an optical system with a backward-moving gravity center and a stage lamp with the same, the optical system with the backward-moving gravity center comprises a focusing lens group with positive focus, a magnifying lens group with negative focus and a light-emitting lens group with positive focus which are sequentially arranged, and light emitted by a light source sequentially passes through the focusing lens group and the magnifying lens group and then is emitted from the light-emitting lens group. The focusing lens group, the magnifying lens group and the light-emitting lens group are arranged in parallel, the light-emitting lens group at least comprises a first lens far away from the magnifying lens group and a second lens close to the magnifying lens group, the distance between the first lens and the second lens is 20mm-80mm, and when the optical system reaches the maximum focal length, the center of gravity of the focusing lens group, the magnifying lens group and the light-emitting lens group is positioned on one side, close to the focusing lens group, of the light-emitting lens group. The second lens, close to the magnifying lens group, of the light-emitting lens group moves towards the magnifying lens group, and the distance between the second lens and the first lens is 20mm-80mm, so that the gravity center of the whole optical system moves towards the magnifying lens group, and the requirements on rotation driving and counterweight of the optical system are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of stage lights, and more particularly to an optical system with a rearward-moved center of gravity and a stage light having the same. Background Art

[0002] As a stage lighting device, the optical system of a stage light usually includes a light source, a focusing lens group, a magnifying lens group, and a light-emitting lens group, which are arranged in sequence from back to front. The light source is required to have high power and brightness, and the beam divergence angle can be adjusted over a wide range. Therefore, the area of ​​the light-emitting lens group is usually set to be large to receive light from the magnifying lens group at various beam divergence angles. At the same time, the thickness of the light-emitting lens group is also large. Since the current focusing lens group, magnifying lens group, and light-emitting lens group are usually made of glass, the large-area light-emitting lens group weighs much more than the focusing lens group and the magnifying lens group, causing the center of gravity of the optical system to be too far forward, usually always located within 20mm in front of the lens on the side of the light-emitting lens group close to the magnifying lens group, making the optical system top-heavy and necessitating the addition of an additional counterweight at the rear end of the optical system. This also causes the rotation drive mechanism of the optical system to require greater torque. Summary of the Invention

[0003] In order to overcome at least one of the defects of the above-mentioned prior art, the present invention provides an optical system with a rearward-shifted center of gravity, which can shift the center of gravity of the optical system rearward to make its weight distribution more balanced and facilitate overall driven rotation.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: an optical system with a rearward shifted center of gravity, comprising a focusing lens group with positive focus, a magnifying lens group with negative focus and a light-emitting lens group with positive focus arranged in sequence, the light emitted by the light source passes through the focusing lens group and the magnifying lens group in sequence and is emitted from the light-emitting lens group, the light-emitting lens group comprises at least a first lens arranged away from the magnifying lens group and a second lens arranged close to the magnifying lens group, the distance between the first lens and the second lens is 20mm-80mm, and when the optical system reaches the maximum focal length, the center of gravity of the focusing lens group, the magnifying lens group and the light-emitting lens group as a whole is located on the side of the light-emitting lens group close to the focusing lens group.

[0005] The optical system with a rearwardly shifted center of gravity is achieved by moving the second lens of the light-emitting lens group close to the magnifying lens group, and moving it closer to the magnifying lens group so that the distance between the first lens and the light-emitting lens group is 20 mm to 80 mm, thereby moving the center of gravity of the entire optical system toward the magnifying lens group. When the optical system reaches the maximum focal length, the center of gravity of the focusing lens group, the magnifying lens group and the light-emitting lens group as a whole is located on the side of the light-emitting lens group close to the focusing lens group, thereby reducing the requirements for the drive and counterweight for the overall rotation of the optical system.

[0006] Furthermore, when the optical system reaches its maximum focal length, the center of gravity of the focusing lens group, the magnifying lens group, and the light-emitting lens group as a whole is located within a range of 2mm-30mm on the side of the light-emitting lens group closest to the focusing lens group. Compared to the prior art in which the center of gravity of the optical system is always located within 20mm in front of the lens on the side of the light-emitting lens group closest to the magnifying lens group, moving the second lens toward the magnifying lens group so that the center of gravity of the entire optical system is located more than 2mm on the side of the light-emitting lens group closest to the focusing lens group can significantly improve the problem of uneven center of gravity and reduce the requirements for driving. At the same time, being located within 30mm of the side of the light-emitting lens group closest to the focusing lens group can avoid moving the second lens too far toward the magnifying lens group, which would cause the entire optical system to be too long.

[0007] Furthermore, the focal length of the light-emitting lens assembly is between 250mm and 350mm; and / or the focal length of the magnifying lens assembly is between -25mm and -100mm; and / or the focal length of the focusing lens assembly is between 20mm and 40mm. This meets the focal length requirements of the light-emitting lens assembly, the magnifying lens assembly, and / or the focusing lens assembly for typical stage lights. When used in combination, the overall length of the optical system also meets the requirements of typical stage lights.

[0008] Furthermore, the light emitting lens assembly further includes a third lens located on a side of the second lens close to the focusing lens assembly, which can effectively eliminate chromatic aberration and make the edge color of the light beam close to the center color.

[0009] Furthermore, the third lens is glued to the second lens, which can reduce the chromatic aberration of the light beam compared to the case where the third lens is not glued to the second lens.

[0010] Furthermore, the first lens has a positive focus, the second lens has a positive focus, and the third lens has a negative focus, so as to achieve better clarity of the light output lens assembly while meeting the overall requirements of the light output lens assembly.

[0011] Furthermore, the diameter of the first lens is between 100 mm and 450 mm, which meets the maximum beam width requirement of a typical stage light, and the first lens is not too small, so that the rearward shift of the center of gravity does not significantly reduce the requirements for the drive and counterweight of the overall rotation of the optical system.

[0012] Furthermore, the diameter of the second lens is at least 20 mm smaller than the diameter of the first lens, so as to minimize the area of ​​the second lens and thus make it lighter, thereby reducing the weight of the entire optical system.

[0013] Furthermore, the weight of the light-emitting lens assembly is between 2 kg and 40 kg, thereby shifting the center of gravity of the optical system backward and significantly reducing the requirements for the drive and counterweight for the overall rotation of the optical system.

[0014] Furthermore, from the light-emitting lens group to the focusing lens group, the magnifying lens group includes a fourth lens with negative focus, a fifth lens with negative focus, and a sixth lens with positive focus, which are sequentially arranged, thereby achieving better clarity of the magnifying lens group while meeting the overall requirements of the magnifying lens group.

[0015] Furthermore, the maximum diameter of the lens of the magnifying glass set is between 50 mm and 100 mm, which meets the general size requirements of stage lights for the magnifying glass set, so that the magnifying glass set meets the needs while occupying a more reasonable space.

[0016] Furthermore, in a direction away from the light-emitting lens assembly, the focusing lens assembly includes, in sequence, a seventh lens with negative focus, an eighth lens with positive focus, a ninth lens with negative focus, a tenth lens with negative focus, an eleventh lens with positive focus, a twelfth lens with positive focus, a thirteenth lens with positive focus, and a fourteenth lens with positive focus. Thus, while meeting the overall requirements of the focusing lens assembly, the clarity of the focusing lens assembly is improved.

[0017] Furthermore, the maximum diameter of the lens of the focusing lens group is between 25 mm and 60 mm, which meets the size requirements of the focusing lens group generally required by stage lights, so that the magnifying lens group meets the requirements while occupying a more reasonable space.

[0018] The present invention further provides a stage light comprising any of the aforementioned optical systems, wherein the optical system is disposed within a lamp head, the lamp head being pivotally connected to a support arm for rotation about a first axis, and the support arm being pivotally connected to a chassis for rotation about a second axis, thereby enabling the light beam emitted by the lamp head to be projected at any angle.

[0019] Furthermore, the space between the first lens and the second lens is connected to the space in the lamp head, so that the first lens can be demisted by utilizing the hot air in the lamp head.

[0020] Furthermore, the first lens and the second lens are independently installed in the lamp holder, which facilitates the separate production of the light-emitting lens assembly and its installation in the lamp holder, thus saving unnecessary space in the lamp holder. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the optical system structure with the center of gravity moved backward according to the present invention.

[0022] Figure 2 It is a schematic cross-sectional view of the stage light of the present invention.

[0023] In the picture: 100. Light output mirror assembly; 110. First lens; 120. Second lens; 130. Third lens; 200. Magnifying lens assembly; 210. Fourth lens; 220. Fifth lens; 230. Sixth lens; 300. Focusing lens assembly; 310. Seventh lens; 320. Eighth lens; 330. Ninth lens; 340. Tenth lens; 350. Eleventh lens; 360. Twelfth lens; 370. Thirteenth lens; 380. Fourteenth lens; 400. Lamp head; 500. Support arm; 600. Chassis. DETAILED DESCRIPTION

[0024] The drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate the embodiments, some components in the drawings may be omitted, enlarged, or reduced in size, and do not represent actual product dimensions. Those skilled in the art will understand that some well-known structures and their descriptions may be omitted from the drawings. The positional relationships depicted in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0025] like Figure 1 The present invention provides an optical system with a rearwardly shifted center of gravity, comprising a focusing lens group 300 with a positive focus, a magnifying lens group 200 with a negative focus, and a light-emitting lens group 100 with a positive focus, wherein light emitted by a light source passes through the focusing lens group 300 and the magnifying lens group 200 in sequence and then is emitted from the light-emitting lens group 100, wherein the light-emitting lens group 100 comprises at least a first lens 110 disposed away from the magnifying lens group 200 and a second lens 120 disposed close to the magnifying lens group 200, wherein the distance between the first lens 110 and the second lens 120 is 20 mm to 80 mm, and when the optical system reaches a maximum focal length, the center of gravity of the focusing lens group 300, the magnifying lens group 200, and the light-emitting lens group 100 as a whole is located on the side of the light-emitting lens group 100 close to the focusing lens group 300.

[0026] The optical system with a rearwardly shifted center of gravity is achieved by moving the second lens 120 provided on the light-emitting lens group 100 close to the magnifying lens group 200, toward the magnifying lens group 200, so that the distance between the second lens 110 and the first lens 120 is 20 mm-80 mm, thereby moving the center of gravity of the entire optical system toward the magnifying lens group 200. When the optical system reaches the maximum focal length, the center of gravity of the focusing lens group 300, the magnifying lens group 200, and the light-emitting lens group 100 as a whole is located on the side of the light-emitting lens group 100 close to the focusing lens group 300, thereby reducing the requirements for driving and counterweighting the overall rotation of the optical system.

[0027] In this embodiment, the focusing lens assembly 300 , the magnifying lens assembly 200 , and the light-emitting lens assembly 100 are all made of glass.

[0028] In this embodiment, the distance between the first lens 110 and the second lens 120 is 60 mm.

[0029] It should be noted that when the optical system reaches the minimum focal length, or between the minimum focal length and the maximum focal length, the center of gravity of the focusing lens assembly 300 , the magnifying lens assembly 200 and the light output lens assembly 100 may also be located within the light output lens assembly 100 .

[0030] In addition, the distance between lenses refers to the distance between the centers of the two lenses, and the distance between lens groups also refers to the distance between the center of the lens on the light-emitting side of one lens group and the center of the lens on the light-incident side of the other lens group.

[0031] Since the stage light is generally operated at the maximum focal length state when it is used as a searchlight to project a light beam with a minimum divergence angle, achieve long-distance projection of the light beam, and have a stronger sense of the light beam, the second lens 120 is moved toward the direction close to the magnifying lens group 200 so that when the optical system reaches the maximum focal length, the center of gravity of the focusing lens group 300, the magnifying lens group 200, and the light output lens group 100 is located on the side of the light output lens group 100 close to the focusing lens group 300, which can effectively reduce the requirements for the drive and counterweight of the overall rotation of the optical system.

[0032] In a preferred embodiment of the present invention, when the optical system reaches its maximum focal length, the center of gravity of the focusing lens assembly 300, the magnifying lens assembly 200, and the light-emitting lens assembly 100 as a whole is located within a range of 2 mm to 30 mm on the side of the light-emitting lens assembly 100 close to the focusing lens assembly 300. Compared to the prior art in which the center of gravity of the optical system is always located within 20 mm in front of the lens of the light-emitting lens assembly 100 close to the magnifying lens assembly 200, moving the second lens 120 toward the magnifying lens assembly 200 so that the center of gravity of the entire optical system is located more than 2 mm on the side of the light-emitting lens assembly 100 close to the focusing lens assembly 300 can significantly improve the problem of uneven center of gravity and reduce the driving requirements. At the same time, by being located within 30 mm of the side of the light-emitting lens assembly 100 close to the focusing lens assembly 300, it can avoid moving the second lens 120 too far toward the magnifying lens assembly 200, which would result in an excessive length of the entire optical system.

[0033] It should be noted that the distance between the center of gravity and the light output lens assembly 100 refers to the distance between the center of gravity and the center of the lens on the light incident side of the light output lens assembly 100. If the second lens 120 serves as the lens on the light incident side of the light output lens assembly 100, the distance between the center of gravity and the center of the second lens 120 is referred to.

[0034] Preferably, when the optical system reaches the maximum focal length, the center of gravity of the focusing lens group 300, the magnifying lens group 200 and the light output lens group 100 is located within 10mm-20mm of the side of the light output lens group 100 close to the focusing lens group 300, preferably around 15mm.

[0035] In a preferred embodiment of the present invention, the focal length of the light-emitting lens assembly 100 is between 250mm and 350mm; and / or the focal length of the magnifying lens assembly 200 is between -25mm and -100mm; and / or the focal length of the focusing lens assembly 300 is between 20mm and 40mm. These requirements meet the focal length requirements of the light-emitting lens assembly 100, the magnifying lens assembly 200, and / or the focusing lens assembly 300 for typical stage lights. When used in combination, the overall length of the optical system also meets the requirements of typical stage lights.

[0036] In this embodiment, the focal length of the light-emitting lens assembly 100 is 315 mm, the focal length of the magnifying lens assembly 200 is -93 mm, and the focal length of the focusing lens assembly 300 is 30 mm.

[0037] In a preferred embodiment of the present invention, the light emitting lens assembly 100 further includes a third lens 130 located on the side of the second lens 120 close to the focusing lens assembly 300. This can effectively eliminate chromatic aberration and make the edge color of the light beam close to the center color.

[0038] When the light output lens assembly 100 further includes the third lens 130 , the distance between the center of gravity and the light output lens assembly 100 refers to the distance between the center of gravity and the center of the third lens 130 .

[0039] In a preferred embodiment of the present invention, the third lens 130 is glued to the second lens 120. Compared with the case where the third lens 130 is not glued to the second lens 120, gluing can reduce the chromatic aberration of the light beam.

[0040] In a preferred embodiment of the present invention, the first lens 110 is positive, the second lens 120 is positive, and the third lens 130 is negative, so as to achieve better clarity of the light output lens assembly 100 while meeting the overall requirements of the light output lens assembly 100.

[0041] In this embodiment, the focal length of the first lens 110 is 513 mm, the focal length of the second lens 120 is 314 mm, and the focal length of the third lens 130 is -467 mm.

[0042] In a preferred embodiment of the present invention, the diameter of the first lens 110 is between 100 mm and 450 mm, meeting the maximum beam width requirement of typical stage lights. Furthermore, the first lens 110 is not too small, so that the rearward shift of the center of gravity does not significantly reduce the requirements for the drive and counterweight of the overall rotation of the optical system.

[0043] In this embodiment, the diameter of the first lens 110 is between 250 mm and 400 mm, preferably about 300 mm.

[0044] In a preferred embodiment of the present invention, the diameter of the second lens 120 is at least 20 mm smaller than the diameter of the first lens 110, so as to minimize the area of ​​the second lens 120 and thereby reduce its weight, thereby reducing the weight of the entire optical system.

[0045] Preferably, the diameter of the second lens 120 is at least 50 mm smaller than the diameter of the first lens 110 . In this embodiment, the diameter of the second lens 120 is 70 mm smaller than the diameter of the first lens 110 .

[0046] In a preferred embodiment of the present invention, the weight of the light output lens assembly 100 is between 2 kg and 40 kg, thereby shifting the center of gravity of the optical system backward and significantly reducing the requirements for the drive and counterweight for the overall rotation of the optical system.

[0047] Preferably, the weight of the light output lens assembly 100 is between 8 kg and 30 kg. In this embodiment, the weight of the light output lens assembly 100 is 12 kg.

[0048] In a preferred embodiment of the present invention, the magnifying lens assembly 200 includes, in order from the light-emitting lens assembly 100 to the focusing lens assembly 300, a fourth lens element 210 with negative focus, a fifth lens element 220 with negative focus, and a sixth lens element 230 with positive focus. This achieves improved clarity while meeting the overall requirements of the magnifying lens assembly 200.

[0049] In this embodiment, the focal length of the fourth lens 210 is -439 mm, the focal length of the fifth lens 220 is -127 mm, and the focal length of the sixth lens 230 is 756 mm. In a preferred embodiment of the present invention, the maximum diameter of the lens of the magnifying glass set 200 is between 50 mm and 100 mm, which meets the general size requirements of the magnifying glass set 200 for stage lights, so that the magnifying glass set 200 meets the requirements while occupying a more reasonable space.

[0050] Preferably, the maximum diameter of the lens of the magnifying lens set 200 is between 65 mm and 85 mm. In this embodiment, the maximum diameter of the lens of the magnifying lens set 200 is 80 mm.

[0051] In the magnifying lens assembly 200 , the lens with the largest diameter is generally the lens closest to the light-emitting lens assembly 100 , that is, the lens located on the light-emitting side of the magnifying lens assembly 200 .

[0052] In a preferred embodiment of the present invention, in a direction away from the light output lens assembly 100, the focusing lens assembly 300 includes, in sequence, a seventh lens element 310 with negative focus, an eighth lens element 320 with positive focus, a ninth lens element 330 with negative focus, a tenth lens element 340 with negative focus, an eleventh lens element 350 with positive focus, a twelfth lens element 360 with positive focus, a thirteenth lens element 370 with positive focus, and a fourteenth lens element 380 with positive focus. Thus, while meeting the overall requirements of the focusing lens assembly 300, the focusing lens assembly 300 can achieve better clarity.

[0053] In this embodiment, the focal length of the seventh lens 310 is -224 mm, the focal length of the eighth lens 320 is 213 mm, the focal length of the ninth lens 330 is -67 mm, the focal length of the tenth lens 340 is -96 mm, the focal length of the eleventh lens 350 is 80 mm, the focal length of the twelfth lens 360 is 124 mm, the focal length of the thirteenth lens 370 is 207 mm, and the focal length of the fourteenth lens 380 is 50 mm.

[0054] In a preferred embodiment of the present invention, the maximum diameter of the lens of the focusing lens assembly 300 is between 25 mm and 60 mm, which meets the size requirements of the focusing lens assembly 300 generally required by stage lights, so that the magnifying lens assembly 200 meets the requirements while occupying a more reasonable space.

[0055] Preferably, the maximum diameter of the lens of the focusing lens assembly 300 is between 35 mm and 50 mm. In this embodiment, the maximum diameter of the lens of the focusing lens assembly 300 is 44 mm.

[0056] In the focusing lens assembly 300 , the lens with the largest diameter is generally the lens closest to the magnifying lens assembly 200 , that is, the lens located on the light-emitting side of the focusing lens assembly 300 .

[0057] like Figure 2 The present invention further provides a stage light comprising any of the aforementioned optical systems, the optical system being disposed within a lamp head 400. The lamp head 400 is pivotally connected to a support arm 500 for rotation about a first axis, and the support arm 500 is pivotally connected to a chassis 600 for rotation about a second axis. This allows the light beam emitted by the lamp head 400 to be projected at any angle.

[0058] In a preferred embodiment of the present invention, the space between the first lens 110 and the second lens 120 is connected to the space in the lamp head 400. Therefore, the first lens 110 can be defogged by utilizing the hot air in the lamp head 400.

[0059] In this embodiment, a fan is provided in the space inside the lamp head 400 to blow hot air in the space inside the lamp head 400 toward between the first lens 110 and the second lens 120 to defog the first lens 110 .

[0060] In a preferred embodiment of the present invention, the first lens 110 and the second lens 120 are independently installed in the lamp holder 400. This facilitates the separate production of the light output lens assembly 100 and its installation in the lamp holder 400, saving unnecessary space in the lamp holder 400.

[0061] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. An optical system with a rearward-shifted center of gravity, characterized in that: The invention comprises a focusing lens group (300) with a positive focus, a magnifying lens group (200) with a negative focus, and a light-emitting lens group (100) with a positive focus, wherein light emitted by a light source passes through the focusing lens group (300) and the magnifying lens group (200) in sequence and then is emitted from the light-emitting lens group (100), wherein the light-emitting lens group (100) comprises at least a first lens (110) arranged away from the magnifying lens group (200) and a second lens (120) arranged close to the magnifying lens group (200), wherein the distance between the first lens (110) and the second lens (120) is 20 mm to 80 mm, and when the optical system reaches a maximum focal length, the center of gravity of the focusing lens group (300), the magnifying lens group (200), and the light-emitting lens group (100) as a whole is located on the side of the light-emitting lens group (100) close to the focusing lens group (300).

2. The optical system with a rearward-shifted center of gravity according to claim 1, wherein: When the optical system reaches a maximum focal length, the center of gravity of the focusing lens group (300), the magnifying lens group (200) and the light output lens group (100) as a whole is located within a range of 2 mm to 30 mm on a side of the light output lens group (100) close to the focusing lens group (300).

3. The optical system with a rearward-shifted center of gravity according to claim 1, wherein: The focal length of the light-emitting lens assembly (100) is between 250 mm and 350 mm; and / or the focal length of the magnifying lens assembly (200) is between -25 mm and -100 mm; and / or the focal length of the focusing lens assembly (300) is between 20 mm and 40 mm.

4. The optical system with a rearwardly shifted center of gravity according to claim 1, wherein: The light-emitting lens assembly (100) further comprises a third lens (130) located on a side of the second lens (120) close to the focusing lens assembly (300).

5. The optical system with a rearwardly shifted center of gravity according to claim 4, wherein: The third lens (130) is glued to the second lens (120).

6. The optical system with a rearwardly shifted center of gravity according to claim 4, wherein: The first lens (110) is positive focus, the second lens (120) is positive focus, and the third lens (130) is negative focus.

7. The optical system with a rearward-shifted center of gravity according to claim 1, wherein: The diameter of the first lens (110) is between 100 mm and 450 mm.

8. The optical system with a rearwardly shifted center of gravity according to claim 7, wherein: The diameter of the second lens (120) is at least 20 mm smaller than the diameter of the first lens (110).

9. The optical system with a rearward-shifted center of gravity according to claim 1, wherein: The weight of the light output lens assembly (100) is between 2 kg and 40 kg.

10. The optical system with a rearward-shifted center of gravity according to claim 1, wherein: From the light-emitting lens group (100) to the focusing lens group (300), the magnifying lens group (200) comprises a fourth lens (210) with negative focus, a fifth lens (220) with negative focus, and a sixth lens (230) with positive focus, which are sequentially arranged.

11. The optical system with a rearwardly shifted center of gravity according to claim 1 or 10, wherein: The maximum diameter of the lens of the magnifying lens set (200) is between 50 mm and 100 mm.

12. The optical system with a rearward-shifted center of gravity according to claim 1, wherein: In a direction away from the light-emitting lens group (100), the focusing lens group (300) comprises a seventh lens (310) with negative focus, an eighth lens (320) with positive focus, a ninth lens (330) with negative focus, a tenth lens (340) with negative focus, an eleventh lens (350) with positive focus, a twelfth lens (360) with positive focus, a thirteenth lens (370) with positive focus, and a fourteenth lens (380) with positive focus, which are arranged in sequence.

13. The optical system with a rearward-shifted center of gravity according to claim 1 or 12, wherein: The maximum diameter of the lens of the focusing lens group (300) is between 25 mm and 60 mm.

14. A stage lamp, comprising the optical system according to any one of claims 1 to 13, wherein the optical system is arranged in a lamp head (400), the lamp head (400) is pivotally connected to a support arm (500) and rotates around a first axis, and the support arm (500) is pivotally connected to a chassis (600) and rotates around a second axis.

15. The stage light according to claim 14, characterized in that The space between the first lens (110) and the second lens (120) is communicated with the space inside the lamp head (400).

16. The stage light according to claim 14, characterized in that The first lens (110) and the second lens (120) are independently installed in the lamp head (400).

Images