Optical system with lens protection function and stage lamp with same

Abstract

The utility model discloses an optical system with a lens protection function and a stage lamp with the same, and the optical system with the lens protection function comprises a light source for generating a light beam, and a lens module and a light-emitting mirror which are sequentially arranged along the light beam emitting direction, a flexible sleeve with two open ends is connected between the lens module and the light-emitting mirror, the light-emitting mirror is connected with a first port of the flexible sleeve, the lens module is connected with a second port of the flexible sleeve, and a cavity is formed among the light-emitting mirror, the lens module and the flexible sleeve; the lens module can move in the direction close to or away from the light source, and the flexible sleeve deforms along with movement of the lens module. The deformable flexible sleeve is connected between the light emitting mirror and the lens module, when the lens module moves in the direction close to or away from the light source, the light inlet face of the light emitting mirror is located in the cavity all the time, electronic components which can generate oil vapor in the light emitting mirror and the lamp body are effectively isolated, and the situation that water vapor and oil vapor enter the cavity and are attached to the light outlet face is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to stage lamp technical field more specifically, it is a kind of optical system and stage lamp with its with lens protection function. BACKGROUND

[0002] During the use of stage lamp, with light source gradually lighting and then continuously working, the heat generated by light source accumulates, which leads to the significant increase of temperature inside lamp body (especially for waterproof lamp with closed lamp cavity), and forms a sharp temperature difference with external environment. The light inlet surface of light outlet mirror is located in high-temperature lamp body, and the light outlet surface is exposed to low-temperature external environment, which causes the condensation of humid air in lamp body on the surface of light outlet mirror to form fog, resulting in the decrease of light transmittance and the deterioration of imaging quality (e.g. light spot blur, chromatic dispersion). However, long-term condensation environment can also induce hydrolytic corrosion of glass surface, forming irreversible micropore damage.

[0003] On the other hand, the high temperature during the working process in the lamp body promotes the volatilization of lubricating oil of mechanical components (such as bearings and sliding rails) located inside, becoming gaseous oily substances. At this time, the oil vapor diffuses to the low-temperature light outlet mirror area and condenses into viscous oil film, and combines with dust to form stubborn dirt. Such contaminants are difficult to remove by conventional methods.

[0004] The traditional anti-fog and anti-oil means is to heat the light outlet mirror to minimize the temperature difference, such as adding heating wires near the light outlet mirror, or blowing hot air, or setting a hydrophobic coating. Although it can temporarily slow down the formation of fog, but since the coating is prone to aging and failure, it is necessary to disassemble and reprocess the light outlet mirror regularly, which is complicated and time-consuming. SUMMARY

[0005] The utility model provides a kind of optical system and stage lamp with its with lens protection function to overcome at least one of the above-mentioned defects of prior art, by setting flexible sleeve between the light outlet mirror and the lens module, the light outlet mirror is protected, effectively prevent the water vapor or oil stain in lamp body from adhering to the light outlet mirror.

[0006] To solve the above technical problems, the utility model adopts the technical scheme: a kind of optical system and stage lamp with its with lens protection function, wherein a kind of optical system with lens protection function includes light source generating light beam, lens module and light outlet mirror arranged in light beam exit direction successively, flexible sleeve with two open ends is connected between the lens module and the light outlet mirror, the light outlet mirror is connected the first port of the flexible sleeve, the second port of the flexible sleeve is connected the lens module, cavity is formed between the light outlet mirror, the lens module and the flexible sleeve;Wherein, the lens module can move in the direction close to or away from the light source, the flexible sleeve deforms with the movement of the lens module.

[0007] By connecting a deformable flexible sleeve between the light-emitting mirror and the lens module, when the lens module moves in the direction of approaching or moving away from the light source, the light inlet surface of the light-emitting mirror is always located in the cavity, effectively isolating the light-emitting mirror from the electronic components in the lamp body that can produce oil vapor, reducing the entry of water vapor and oil vapor into the cavity and adhering to the light-emitting surface. Compared with the existing scheme, the existing scheme is to generate fog and then heat or blow hot air to remove the fog, while the present scheme greatly reduces the possibility of fog and oil stains on the surface of the light-emitting mirror from the beginning, effectively protecting the light-emitting mirror. When maintenance is needed, only the flexible sleeve needs to be replaced, and the disassembly and assembly are simple.

[0008] Further, the light-emitting mirror is sealingly connected to the first port, and the lens module is sealingly connected to the second port, so that the cavity formed between the light-emitting mirror, the lens module and the flexible sleeve is in a sealed state, and the cavity has at least one air-permeable hole provided with a liquid-proof air-permeable film. A sealed cavity is formed, effectively preventing water vapor or oil vapor inside the lamp body from entering the cavity and adhering to the light inlet surface of the light-emitting mirror, providing better protection for the light-emitting mirror. Since the cavity is in a sealed state, when the lens module moves in the direction of approaching or moving away from the light source, the cavity inside is like a pump, and the air-permeable hole needs to be provided to release the gas, so that the air pressure inside the cavity is balanced.

[0009] Further, the first port and the second port of the flexible sleeve are respectively provided with a first base plate and a second base plate, and the flexible sleeve is fixedly connected to the light-emitting mirror and the lens module through the first base plate and the second base plate. The first base plate and the second base plate provide sufficient support force for the flexible sleeve, so that it can be stably connected to the light-emitting mirror and the lens module, the installation structure is simple, and maintenance is easy.

[0010] Further, a plurality of lens modules are sequentially arranged in the direction of the light beam, and the flexible sleeve connects the light-emitting mirror and the lens modules adjacent thereto. The length of the flexible sleeve can be effectively reduced, and when the lens module moves towards the light-emitting mirror, the folded part of the flexible sleeve only occupies a small volume, saving the installation space inside the lamp body, and more size types of lamps can be adapted.

[0011] Further, the lens module is a magnifying lens or a focusing lens. When the lens module is the magnifying lens, the divergence angle of the light beam of the light source is changed when moving towards or away from the light source, and finally the size of the light spot on the target plane is changed. When the lens module is the focusing lens, the imaging distance and the definition of the optical system are adjusted when moving towards or away from the light source, and the pattern effect module can be used in cooperation.

[0012] Further, a driving module for driving the lens module to move is further included, and the driving module is located outside the cavity. Since the driving mechanism needs to be lubricated to maintain normal operation, it is arranged outside the cavity, and the flexible sleeve can more effectively isolate the light-emitting mirror from the components inside the lamp body that generate oil vapor, thereby achieving better protection effect.

[0013] Further, the flexible sleeve is a foldable concertina. The concertina has a large expansion ratio and precise deformation guide, and the wrinkle structure increases the surface area, so that the heat inside the cavity can be quickly conducted to the outside to prevent high temperature accumulation. At the same time, the concertina can be compactly folded, and is suitable for use in lamps with compact internal structure.

[0014] Further, the flexible sleeve has a hydrophobic and / or oleophobic outer surface. The flexible sleeve has good waterproof and / or oil-proof properties.

[0015] Further, an effect module for intercepting the light beam to generate a specific light effect is further included, and the effect module is arranged between the light source and the lens module. By adding the effect module and cooperating with the lens module, the light effects are superimposed on each other to form more rich optical effects. Since the effect module needs to add a large amount of lubricating oil to maintain work during the working process, the effect module is isolated outside the cavity, and good oil stain prevention effect can be achieved.

[0016] The utility model also provides a stage lamp, including the lamp head with the light outlet, any one of the optical system is installed in the lamp head, the light-emitting mirror cover is located the light outlet, the light source is located the lamp head far from the light outlet one end and relative the light-emitting mirror position fixed. Adopt the optical system, greatly reduce the probability that the light-emitting mirror is attached by water mist, oil dirt, guarantee the stage lamp's light clearness and accurate projection effect.

[0017] Further, the lamp head further includes two oppositely arranged support frame plates, and the light-emitting mirror and the flexible sleeve are respectively fixedly installed on one end of the support frame plates away from the light source through the mounting plate and the first base plate. The stable connection between the flexible sleeve and the light-emitting mirror is ensured, and the structure is simple and easy to maintain. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a lamp head equipped with the optical system described in this utility model.

[0019] Figure 2 This is a partial structural diagram of a lamp head equipped with the optical system described in this utility model.

[0020] Figure 3 This is a schematic diagram of the structure of a stage lamp equipped with the optical system described in this utility model.

[0021] In the picture:

[0022] 100, Light source; 200, Lens module; 210, Third substrate; 220, Drive module; 300, Light output lens; 400, Flexible sleeve; 411, First port; 412, Second port; 421, First substrate; 422, Second substrate; 430, Vent hole; 440, Liquid-proof and breathable membrane; 500, Effect module; 600, Lamp head; 610, Support frame plate; 700, Support arm; 800, Chassis. Detailed Implementation

[0023] 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.

[0024] like Figures 1 to 2 As shown, an optical system with lens protection function and a stage light having the same are disclosed. The optical system with lens protection function includes a light source 100 that generates a light beam, a lens module 200 and a light-emitting mirror 300 arranged sequentially along the light beam emission direction. A flexible sleeve 400 with openings at both ends is connected between the lens module 200 and the light-emitting mirror 300. The light-emitting mirror 300 is connected to a first port 411 of the flexible sleeve 400, and the lens module 200 is connected to a second port 412 of the flexible sleeve 400. A cavity is formed between the light-emitting mirror 300, the lens module 200 and the flexible sleeve 400. The lens module 200 can move in a direction close to or away from the light source 100, and the flexible sleeve 400 deforms with the movement of the lens module 200.

[0025] By connecting the flexible sleeve 400 between the light-out mirror 300 and the lens module 200, when the lens module 200 moves along the direction of approaching or moving away from the light source 100, the light-in surface of the light-out mirror 300 is always located in the cavity, effectively isolating the light-out mirror 300 from the electronic components in the lamp body that can produce oil vapor, reducing the water vapor and oil vapor entering the cavity and adhering to the light-out surface. Compared with the prior art, the prior art is to heat or blow hot air to remove the mist after the mist is generated, while the present application greatly reduces the possibility of mist and oil stain on the surface of the light-out mirror 300 from the beginning, effectively protecting the light-out mirror 300. When maintenance is needed, only the flexible sleeve 400 needs to be replaced, and the disassembly and assembly are simple.

[0026] Preferably, the lens module 200 further comprises a lens and a third substrate 210 for fixedly mounting the lens, and the light-out surface of the lens is completely located inside the cavity.

[0027] Preferably, the light-out mirror 300 can be a plane lens or a convex lens according to design needs.

[0028] Preferably, the inner surface and / or the outer surface of the flexible sleeve 400 are subjected to anti-reflection treatment to avoid reflection of light in the optical system and cause glare.

[0029] In the preferred embodiment of the present application, the light-out mirror 300 is sealingly connected to the first port 411, and the lens module 200 is sealingly connected to the second port 412, so that the cavity formed between the light-out mirror 300, the lens module 200 and the flexible sleeve 400 is in a sealed state, and the cavity has at least one air-permeable hole 430 provided with a liquid-proof air-permeable film 440. The sealed cavity effectively prevents water vapor or oil vapor in the lamp body from entering the cavity and adhering to the light-in surface of the light-out mirror 300, thereby providing better protection for the light-out mirror 300. Since the cavity is in a sealed state, when the lens module 200 moves along the direction of approaching or moving away from the light source 100, the cavity inside is like a pump, and the air-permeable hole 430 needs to be provided to release the gas, so that the air pressure inside the cavity is balanced.

[0030] Preferably, the flexible sleeve 400 is fixedly connected to the light-out mirror 300 and the lens module 200 through the first substrate 421 and the second substrate 422, respectively, and the number of air-permeable holes 430 is multiple and all are arranged on the second substrate 422. The liquid-proof air-permeable film 440 can be waterproof or oil-proof or both, and in this embodiment, it is an EF series oil-proof and waterproof film.

[0031] In the preferred embodiment of the utility model, the first port 411 and the second port 412 of the flexible sleeve 400 are respectively provided with a first base plate 421 and a second base plate 422, and the flexible sleeve 400 is fixedly connected with the light-emitting mirror 300 and the lens module 200 through the first base plate 421 and the second base plate 422. The first base plate 421 and the second base plate 422 provide sufficient support for the flexible sleeve 400, so that the flexible sleeve 400 can be stably connected with the light-emitting mirror 300 and the lens module 200, the mounting structure is simple, and maintenance is easy.

[0032] Preferably, the material of the first base plate 421 and the second base plate 422 is aluminum alloy, which has the characteristics of lightness and easy processing, and the surface is sprayed with black paint.

[0033] In the preferred embodiment of the utility model, a plurality of lens modules 200 are sequentially arranged along the emission direction of the light beam, and the flexible sleeve 400 is connected with the light-emitting mirror 300 and the lens module 200 adjacent thereto. The length of the flexible sleeve 400 can be effectively reduced, and when the lens module 200 moves close to the light-emitting mirror 300, the folded part of the flexible sleeve 400 only occupies a small volume, thereby saving the installation space inside the lamp body and adapting to more size types of lamps.

[0034] In the preferred embodiment of the utility model, the lens module 200 is a magnifying lens or a focusing lens. When the lens module 200 is the magnifying lens, the divergence angle of the light beam of the light source 100 is changed when moving close to or away from the light source 100, and finally the size of the light spot on the target plane is changed; when the lens module 200 is the focusing lens, the imaging distance and the definition of the optical system are adjusted when moving close to or away from the light source 100, and the pattern effect module 500 can be used in cooperation.

[0035] Preferably, when the optical system simultaneously has the magnifying lens and the focusing lens, the lens module 200 is a magnifying lens.

[0036] In the preferred embodiment of the utility model, a driving module 220 for driving the lens module 200 to move is further included, and the driving module 220 is located outside the cavity. Since the driving mechanism needs to add lubricating oil for maintenance during normal operation, the driving module 220 is arranged outside the cavity, and the flexible sleeve 400 can more effectively isolate the light-emitting mirror 300 from the components inside the lamp body that generate oil vapor, thereby achieving better protection effect.

[0037] Preferably, a guide rod, a sliding block slidingly mounted on the guide rod, a motor providing driving force, a driving wheel connected with a rotating shaft of the motor, a driven wheel, and a synchronous belt simultaneously sleeved on the driving wheel and the driven wheel are further included, the synchronous belt is fixedly connected with the sliding block to drive the sliding block to slide up and down along the guide rod, and the sliding block is fixedly connected with the third substrate 210 to transmit the driving force of the motor to the lens module 200.

[0038] Optionally, the driving module is a lead screw motor, which is connected with the third substrate 210 through a sliding block to drive the lens module 200 to move in a direction close to or away from the light source 100.

[0039] In the preferred embodiment of the present application, the flexible sleeve 400 is a foldable concertina. The concertina has a large expansion ratio and precise deformation guiding property, and the wrinkle structure increases the surface area, so that the heat inside the cavity can be quickly conducted to the outside to prevent high-temperature accumulation. At the same time, the concertina can be compactly folded, and is suitable for use in lamps with compact internal structures.

[0040] In the preferred embodiment of the present application, the flexible sleeve 400 has a hydrophobic and / or oleophobic outer surface. The flexible sleeve 400 has good waterproof and / or oil-proof properties. Preferably, the flexible sleeve 400 has both oleophobicity and hydrophobicity.

[0041] In the preferred embodiment of the present application, an effect module 500 for intercepting the light beam to generate a specific light effect is further included, and the effect module 500 is arranged between the light source 100 and the lens module 200. By adding the effect module 500 and cooperating with the lens module 200, the light effects are superimposed on each other to form more abundant optical effects. Since the effect module 500 needs to add a large amount of lubricating oil to maintain work during the working process, the effect module 500 is isolated from the cavity, which can achieve good oil stain prevention.

[0042] Preferably, the effect module 500 is at least one of a fire plate, a rotating pattern plate, a fixed pattern plate, a color sheet plate, a prism, an atomizing sheet, or a CMY component.

[0043] As Figure 1 and Figure 3As shown, in another embodiment, the utility model also provides a stage lamp, including the lamp holder 600 with the light outlet, any one of the optical system of preceding description is installed in the lamp holder 600, the light exit mirror 300 cover is equipped in the light outlet, the light source 100 is located the end of the lamp holder 600 away from the light outlet and is fixed relative to the position of the light exit mirror 300.Using the optical system, the probability of the light exit mirror 300 being attached by water mist, oil dirt is greatly reduced, and the light clarity of the stage lamp and the accurate projection effect are guaranteed.

[0044] Preferably, it further comprises a support arm 700 for pivoting the lamp holder 600 and a cabinet 800 for supporting the rotation of the support arm 700.

[0045] In the preferred embodiment of the utility model, the lamp holder 600 further comprises two oppositely arranged support frame plates 610, and the light exit mirror 300 and the flexible sleeve 400 are respectively fixedly installed on one end of the support frame plate 610 away from the light source 100 through the mounting plate and the first base plate 421. The stable connection between the flexible sleeve 400 and the light exit mirror 300 is ensured, which is not easy to fall off and has a simple structure and easy maintenance.

[0046] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments are not enumerated. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claims.

Claims

1. An optical system having a lens protection function, characterized by comprising: The optical system comprises a light source (100) generating a light beam, a lens module (200) and a light exit mirror (300) arranged in sequence along the light beam exit direction, a flexible sleeve (400) with open ends connected between the lens module (200) and the light exit mirror (300), the light exit mirror (300) connected to the first port (411) of the flexible sleeve (400), the lens module (200) connected to the second port (412) of the flexible sleeve (400), and a cavity formed between the light exit mirror (300), the lens module (200) and the flexible sleeve (400); wherein the lens module (200) can move towards or away from the light source (100), and the flexible sleeve (400) deforms with the movement of the lens module (200).

2. The optical system of claim 1, wherein The light exit mirror (300) is sealingly connected to the first port (411), and the lens module (200) is sealingly connected to the second port (412), so that the cavity formed between the light exit mirror (300), the lens module (200) and the flexible sleeve (400) is in a sealed state, and the cavity has at least one air-permeable hole (430) provided with a liquid-proof air-permeable film (440).

3. The optical system of claim 1, wherein, The first port (411) and the second port (412) of the flexible sleeve (400) are respectively provided with a first base plate (421) and a second base plate (422), and the flexible sleeve (400) is fixedly connected to the light exit mirror (300) and the lens module (200) through the first base plate (421) and the second base plate (422).

4. The optical system of claim 1, wherein, A plurality of lens modules (200) are arranged in sequence along the light beam exit direction, and the flexible sleeve (400) is connected to the light exit mirror (300) and the lens module (200) adjacent thereto.

5. The optical system of claim 1, wherein, The lens module (200) is a magnifying lens or a focusing lens.

6. The optical system of claim 1, wherein, A driving module (220) is further included for driving the movement of the lens module (200), and the driving module (220) is located outside the cavity.

7. The optical system of claim 1, wherein The flexible sleeve (400) is a foldable concertina.

8. The optical system of claim 1, wherein, The flexible sleeve (400) has a hydrophobic and / or oleophobic outer surface.

9. The optical system of claim 1, wherein, An effect module (500) is further included for intercepting the light beam to generate a specific light effect, and the effect module (500) is arranged between the light source (100) and the lens module (200).

10. A stage light comprising a lamp head (600) having a light exit opening, characterized in that The optical system according to any one of claims 1 to 9 is installed in a lamp holder (600), the light exit mirror (300) covers the light exit port, and the light source (100) is located at the end of the lamp holder (600) away from the light exit port and is fixed relative to the light exit mirror (300).

11. The stage light of claim 10, wherein, The lamp holder (600) further comprises two oppositely arranged support frame plates (610), and the light exit mirror (300) and the flexible sleeve (400) are fixedly installed on the ends of the support frame plates (610) away from the light source (100) through the mounting plate and the first base plate (421).

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