Light-emitting diode (LED) light source condensation system lens

Abstract

The utility model discloses an LED light source condensation system lens which comprises a lens barrel, a protective cover, a GOBO sheet, a first lens, a second lens, a third lens and a light source. The lens barrel is provided with an accommodating cavity; clamping grooves and connecting parts are arranged on the outer side of the lens barrel at intervals; the protective cover is provided with an installation position, and the GOBO sheet is arranged in the installation position and located on the left side of the first lens. The protective cover is further provided with a clamping part and a connecting groove. The anti-skid cover is detachably arranged on the lens barrel, the clamping part is matched with the clamping groove, and the connecting groove is matched with the connecting part; the left and right sides of the first lens, the second lens and the third lens are coated with anti-reflection layers, so that when the lens group or the light source is disassembled, the risk of light path disturbance is reduced, and meanwhile, the service life is prolonged by being far away from a heat source generated by the light source; therefore, the connection stability between the protective cover and the lens barrel is ensured, and the light reflection is reduced by the light enhancement layer to increase the transmittance.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field technology of LED light source spotlight system lens especially to a LED light source spotlight system lens. BACKGROUND

[0002] With the rapid development of high-power LED lighting technology, 60W level LED spotlight system is increasingly widely used in the fields of stage lighting, building projection, etc. In the process of stage performance, in order to illuminate and achieve a certain light effect, stage lights are used, the projection of the stage lights helps to show the content of the program, embodies the author's creative intention, highlights the artistic atmosphere, and makes the audience and the camera get the correct color feeling and exposure. The working principle of the stage light is that the light source assembly is projected onto the lens group, and the lens group is mostly a combination of several spherical lenses.

[0003] Most of the LED light source spotlight system lenses in the prior art are usually composed of a lens barrel, a GOBO piece and a lens group, the GOBO piece is mostly arranged between the lens group or near the light source, and needs to be disassembled from the lens barrel or adjusted when replaced, which is easy to cause the optical axis to deviate and is easy to be deformed due to the heat of the light source. Later, a design for changing the position of the GOBO piece by adding a protective cover appeared on the market, the GOBO piece is arranged on the protective cover, the protective cover is threadedly connected to the lens barrel, and the GOBO piece is changed to avoid the need to disassemble the lens barrel when replacing. However, the protective cover is threadedly connected to the lens barrel, which is easy to loosen after long-term use, affects the coaxiality of the optical elements, and causes the light spot to be distorted. Moreover, since no structure for preventing light loss is arranged on the lens group, the lens surface will be affected by the Fresnel reflection optical phenomenon, resulting in a loss of luminous flux, especially in a multi-lens system, the cumulative effect is significant, and the overall light efficiency is reduced.

[0004] Therefore, it is necessary to study a new technical solution to solve the above problems. UTILITY MODEL CONTENT

[0005] Therefore, the utility model mainly aims at the defects of the prior art, and provides a LED light source spotlight system lens, which is designed by a protective cover, a lens barrel and a light increasing layer, the GOBO piece is arranged in the mounting position and located on the left side of the first lens, so that when the lens group or the light source is disassembled, the risk of disturbing the light path is reduced, the heat source generated by the light source is far away, the service life is prolonged, and the connection stability between the protective cover and the lens barrel is ensured, and the light reflection of the light increasing layer is reduced to increase the transmittance.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An LED light source spotlight system lens, comprising a lens barrel, a protective cover, a GOBO plate, a first lens, a second lens, a third lens and a light source;

[0008] The lens barrel has a containing cavity; the first lens, the second lens, the third lens and the light source are sequentially arranged in the containing cavity from left to right; a clamping groove and a connecting part are arranged on the outer side of the lens barrel;

[0009] The protective cover is provided with a mounting position, the GOBO plate is arranged in the mounting position and located at the left side of the first lens; the protective cover is further provided with a clamping part matched with the clamping groove and a connecting groove matched with the connecting part; the anti-skid cover is detachably arranged on the lens barrel, the clamping part is matched with the clamping groove, and the connecting groove is matched with the connecting part; the left and right sides of the first lens, the second lens and the third lens are covered with an anti-reflection layer.

[0010] As a preferred scheme, the lens barrel comprises a main body part and a straight barrel part, the straight barrel part is arranged extending from the left end of the main body part; the clamping groove and the connecting part are arranged on the straight barrel part; the clamping groove is concave on the straight barrel part; the clamping part is arranged extending upward from the left end of the straight barrel part.

[0011] As a preferred scheme, a first upper limiting ring and a first lower limiting ring are further arranged between the right side of the first lens and the left side of the second lens; the first upper limiting ring is at least partially attached to the upper edge of the first lens and the second lens respectively; the second lower limiting ring is at least partially attached to the lower edge of the first lens and the second lens respectively, the design of the first upper limiting ring and the first lower limiting ring avoids the shaking of the first lens and the second lens, which affects the coaxiality of the optical elements and causes spot distortion.

[0012] As a preferred scheme, a second upper limiting ring and a second lower limiting ring are further arranged between the right side of the second lens and the left side of the third lens; the second upper limiting ring is at least partially attached to the upper edge of the second lens and the third lens respectively; the second lower limiting ring is at least partially attached to the lower edge of the second lens and the third lens respectively, which avoids the shaking of the second lens and the third lens, which affects the coaxiality of the optical elements and causes spot distortion.

[0013] As a preferred scheme, when the protective cover is arranged on the lens barrel, the left side of the first lens is at least partially abutted on the inner side of the protective cover, which forms positioning for the first lens and prevents loosening which affects later use.

[0014] As a preferred scheme, a positioning part is further arranged in the containing cavity; a lap joint part is arranged on the side of the third lens close to the light source; the third lens is arranged in the containing cavity, and the lap joint part is fixedly arranged on the positioning part, which forms positioning for the third lens and prevents loosening which affects the imaging of the light source.

[0015] As a preferred solution, the third lens is flat on the side close to the light source.

[0016] As a preferred solution, the anti-reflection layer is made of titanium dioxide or magnesium fluoride.

[0017] The utility model discloses have obvious advantage and beneficial effect compared with prior art, specifically speaking, from above technical scheme can know, it is mainly through the structure design of protective cover and lens barrel, the GOBO piece sets up in the installation position and is located the left side of first lens, like this, avoid when disassembling lens group or light source, reduce the risk of light path disturbance and lengthen the service life of the heat source produced by the light source away,

[0018] Then through the cooperation of the clamping groove and connecting portion on the lens barrel and the clamping portion and connecting portion on the protective cover, the anti-slip cover is detachably arranged on the lens barrel, so that the double locking structure makes the connection between the protective cover and the lens barrel stable.

[0019] Finally, the design of the anti-reflection layer reduces light reflection to increase transmittance, makes the optical system imaging clearer, and effectively improves the LED light energy utilization rate.

[0020] To make the structure characteristics and functions of the utility model clearer, the utility model will be described in detail below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the sectional view of the embodiment of the utility model;

[0022] Figure 2 is the exploded view of the embodiment of the utility model (not showing the lens barrel);

[0023] Figure 3 is the grating table simulation schematic diagram of the embodiment of the utility model;

[0024] Figure 4 is the line chart simulation schematic diagram of the embodiment of the utility model;

[0025] Figure 5 is the surface chart simulation schematic diagram of the embodiment of the utility model.

[0026] EXPLANATION OF THE DRAWINGS:

[0027] 10, lens barrel 11, accommodating cavity

[0028] 12, clamping groove 13, connecting portion

[0029] 14, positioning portion 15, main body portion

[0030] 16, straight cylinder portion 111, first upper limit position ring

[0031] 112, first lower limit position ring 113, second upper limit position ring

[0032] 114, second lower limit position ring

[0033] 20, protective cover 21, clamping portion

[0034] 22, connecting groove 30, GOBO sheet

[0035] 40, first lens 50, second lens

[0036] 60, third lens 61, lap joint portion

[0037] 70, light source 90, anti-reflection layer DETAILED DESCRIPTION

[0038] Please refer to Figures 1 to 5 The specific structure of the embodiment of the utility model is shown.

[0039] In the description of the utility model, it should be pointed out that for the orientation words, if the orientation and position relationship indicated by the terms "up", "down", "front", "back", "left", "right" and the like is based on the orientation or position relationship shown in the drawings or normal wearing and using, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific protection scope of the utility model.

[0040] An LED light source spotlight system lens, comprising a lens barrel, a protective cover, a GOBO sheet, a first lens, a second lens, a third lens and a light source.

[0041] The lens barrel has a containing cavity; the first lens, the second lens, the third lens and the light source are sequentially arranged in the containing cavity from left to right; the outer side of the lens barrel is provided with a clamping groove and a connecting portion; preferably, the containing cavity is further provided with a positioning portion;

[0042] Preferably, the lens barrel comprises a main body portion and a straight cylinder portion, the straight cylinder portion is extended and arranged from the left end of the main body portion; the clamping groove and the connecting portion are arranged on the straight cylinder portion; the clamping groove is concave on the straight cylinder portion; the clamping portion is extended and arranged upward from the left end of the straight cylinder portion.

[0043] The protective cover is provided with a mounting position, and the GOBO sheet is arranged in the mounting position and located at the left side of the first lens;

[0044] A GOBO is an optical accessory used in the fields of photography, film and television production, stage lighting, etc., also known as "shaping plate", "light blocking plate", etc., which is engraved or hollowed out with various shapes, patterns or characters. When the light emitted by the light source passes through the GOBO, it is cut by the pattern or hollowed part on the GOBO, and then projected through the optical elements such as the lens, forming a light and shadow effect identical to the pattern on the GOBO on the target surface (such as the shooting scene, stage, screen, etc.), thereby adding rich texture, level and creative elements to the picture.

[0045] The protective cover is further provided with a clamping portion adapted to the clamping groove and a connecting groove adapted to the connecting portion; the anti-skid cover is detachably arranged on the lens barrel, the clamping portion is adapted to the clamping groove, and the connecting groove is adapted to the connecting portion.

[0046] Preferably, when the protective cover is arranged on the lens barrel, the left side of the first lens at least partially abuts on the inner side of the protective cover, positioning the first lens and preventing loosening that affects later use.

[0047] The left and right sides of the first lens, the second lens and the third lens are each covered with an anti-reflection layer. Preferably, the anti-reflection layer is made of titanium dioxide or magnesium fluoride.

[0048] In the embodiment, the anti-reflection layer can be arranged on the lens by a vacuum coating method or a chemical vapor deposition method or a sol-gel method, and the forming methods of the vacuum coating method, the chemical vapor deposition method and the sol-gel method are known in the art. The vacuum coating method includes a vacuum evaporation method and a sputtering method. The vacuum evaporation method is to evaporate the coating material by heating, so that it condenses into a film on the substrate. The sputtering method is to make target atoms sputter onto the substrate to form a thin film under high vacuum environment by ion bombardment of the target material.

[0049] The chemical vapor deposition method is to supply a gas containing elements constituting a thin film to a substrate, and use heating, ultraviolet light and plasma energy to deposit a thin film on the substrate by chemical reaction;

[0050] The sol-gel method is to use a compound containing a highly chemically active component as a precursor, uniformly mix the raw materials in a liquid phase, and perform hydrolysis and condensation chemical reactions to form a stable transparent sol system in the solution, and then form it on the substrate by pulling, coating and other processes.

[0051] In the embodiment, the focal length (EFL) of the 60W LED light source spotlight system lens is 5.4mm, the total length (TOTR) is 11.5mm, the aperture (F number) is 0.52, the GOBO diameter is 11mm, and the light efficiency is 89%.

[0052] The thickness of the GOBO sheet is 1mm; the left curvature radius of the first lens is 200mm, the thickness is 2.76mm, the refractive index is 1.74693, and the Abbe number is 50.95; the right curvature radius of the first lens is 12.7mm, and the thickness is 0.3mm;

[0053] The left curvature radius of the second lens is 12.7mm, the thickness is 2.76mm, the refractive index is 1.80518, and the Abbe number is 25.46; the right curvature radius of the second lens is 200mm, and the thickness is 0.5mm;

[0054] The left curvature radius of the third lens is 5.1mm, the thickness is 4.1mm, the refractive index is 1.74693, and the Abbe number is 50.95; the right curvature radius of the second lens is a plane, and the thickness is 0.7mm.

[0055] Preferably, a first upper limiting ring and a first lower limiting ring are further arranged between the right side of the first lens and the left side of the second lens; the first upper limiting ring is at least partially attached to the upper edge of the first lens and the second lens respectively; and the first lower limiting ring is at least partially attached to the lower edge of the first lens and the second lens respectively, so that the first lens and the second lens are prevented from shaking and affecting the coaxiality of the optical elements, thereby avoiding light spot distortion.

[0056] Preferably, a second upper limiting ring and a second lower limiting ring are further arranged between the right side of the second lens and the left side of the third lens; the second upper limiting ring is at least partially attached to the upper edge of the second lens and the third lens respectively; and the second lower limiting ring is at least partially attached to the lower edge of the second lens and the third lens respectively, so that the second lens and the third lens are prevented from shaking and affecting the coaxiality of the optical elements, thereby avoiding light spot distortion.

[0057] The third lens is provided with a lap joint portion on the side close to the light source; the third lens is arranged in the accommodating cavity, and the lap joint portion is fixedly mounted on the positioning portion to position the third lens and prevent the third lens from loosening and affecting the imaging of the light source.

[0058] As shown in Figures 3 to 5 The light intensity received by the GOBO position is simulated by simulation in LIGHTTOOLS software.

[0059] The design focus of the utility model lies in that it is mainly through the structural design of the protective cover and the lens barrel, the GOBO sheet is arranged in the mounting position and located at the left side of the first lens, so that the risk of light path disturbance is reduced when the lens group or the light source is disassembled, and the heat source generated by the light source is far away, thereby prolonging the service life.

[0060] Then through the cooperation of the clamping groove and the connecting part on the lens barrel and the clamping part and the connecting part on the protective cover, the anti-skid cover is detachably arranged on the lens barrel, so that the double locking structure makes the connection stability between the protective cover and the lens barrel;

[0061] Finally, the design of the anti-reflection layer reduces the reflection of light to increase the transmittance, so that the imaging of the optical system is clearer, and the LED light energy utilization rate is effectively improved.

[0062] The above is only a preferred embodiment of the present application, and does not limit the technical scope of the present application in any way. Therefore, any slight modification, equivalent change and modification of the above embodiment according to the technical essence of the present application still belongs to the scope of the technical scheme of the present application.

Claims

1. An LED light source condensing system lens, characterized by: The lens barrel, the protective cover, the GOBO sheet, the first lens, the second lens, the third lens and the light source are included. The lens barrel has a containing cavity; the first lens, the second lens, the third lens and the light source are sequentially arranged in the containing cavity from left to right; a clamping groove and a connecting part are arranged on the outer side of the lens barrel; The protective cover is arranged on the mounting position and located on the left side of the first lens; the protective cover is further provided with a clamping part matched with the clamping groove and a connecting groove matched with the connecting part; the protective cover is detachably arranged on the lens barrel, the clamping part is matched with the clamping groove, and the connecting groove is matched with the connecting part; the left and right sides of the first lens, the second lens and the third lens are covered with an anti-reflection layer.

2. The LED light source condensing system lens of claim 1, wherein: The lens barrel includes a main body part and a straight cylinder part, the straight cylinder part is arranged extending from the left end of the main body part; the clamping groove and the connecting part are arranged on the straight cylinder part; the clamping groove is concave on the straight cylinder part; the clamping part is arranged extending upward from the left end of the straight cylinder part.

3. The LED light source condensing system lens of claim 1, wherein: The first upper limiting ring and the first lower limiting ring are further arranged between the right side of the first lens and the left side of the second lens; the first upper limiting ring is at least partially attached to the upper edge of the first lens and the second lens respectively; the first lower limiting ring is at least partially attached to the lower edge of the first lens and the second lens respectively.

4. The LED light source condensing system lens of claim 1, wherein: The second upper limiting ring and the second lower limiting ring are further arranged between the right side of the second lens and the left side of the third lens; the second upper limiting ring is at least partially attached to the upper edge of the second lens and the third lens respectively; the second lower limiting ring is at least partially attached to the lower edge of the second lens and the third lens respectively.

5. The LED light source condensing system lens of claim 1, wherein: When the protective cover is arranged on the lens barrel, the left side of the first lens is at least partially abutted on the inner side of the protective cover.

6. The LED light source condensing system lens of claim 2, wherein: The containing cavity is further provided with a positioning part; the side of the third lens close to the light source is provided with a lap joint part; the third lens is arranged in the containing cavity, and the lap joint part is fixedly arranged on the positioning part.

7. The LED light source condensing system lens according to claim 6, characterized in that: The side of the third lens close to the light source is a plane.

8. The LED light source condensing system lens of claim 1, wherein: The anti-reflection layer is made of titanium dioxide or magnesium fluoride.

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