Zoom lens group of low-power stage moving head lamp

Abstract

The utility model relates to the technical field of projection lenses, in particular to a zoom lens group of a low-power stage moving head lamp. The stage moving head lamp zoom lens group is composed of a zoom lens group, a magnifying lens group and a fixed lens group. Wherein the zoom lens group comprises a first lens with positive focal power, a second lens with positive focal power, a third lens with negative focal power, a fourth lens with positive focal power, a fifth lens with negative focal power, a sixth lens with positive focal power and a seventh lens with positive focal power; the magnifying lens group comprises an eighth lens with positive focal power, a ninth lens with negative focal power and a tenth lens with negative focal power; the fixed lens group comprises an eleventh lens with negative focal power, a twelfth lens with positive focal power and a thirteenth lens with positive focal power. According to the utility model, an optical system formed by combining 13 lenses is applied, so that a high-brightness picture can be projected, and the imaging is clear.

Description

Technical Field

[0001] The utility model relates to the technical field of projection lenses, in particular to a low-power stage moving head light zoom lens group. Background Art

[0002] Stage moving head light is a special stage lighting equipment, usually used in KTV, stage, theater, church, dance hall, concert and other activity places, which can be used to create various dynamic lighting effects and is an indispensable stage lighting for stage performances. Its main feature is that it can shake its head with the rhythm of the music and the movements of the performers, which can enhance the performance of the performers and add more entertainment and visual impact to the performance.

[0003] Traditional stage moving head lights generally use high-power LED light sources. Although they have high brightness, large light spots and strong effects, they consume a lot of electricity. In addition, the lamp body is bulky, large in size and too heavy, which makes installation difficult and expensive. Moreover, due to the complexity of the structure, the zoom lens often has a certain loss in imaging quality, resulting in unclear imaging. In order to meet customers' needs for reducing costs and improving beam effects, the utility model came into being. Utility Model Content

[0004] The utility model aims to solve the shortcomings of the prior art and provide a low-power stage moving head light zoom lens group.

[0005] To achieve the above purpose, the utility model provides the following technical solutions: a low-power stage moving head light zoom lens group, composed of a zoom lens group, a magnifying lens group and a fixed lens group, the zoom lens group, the magnifying lens group and the fixed lens group are placed on the same axis, starting from the light source end, they are the zoom lens group, the magnifying lens group and the fixed lens group in sequence; wherein the zoom lens group includes a first lens with positive focal power, a second lens with positive focal power, a third lens with negative focal power, a fourth lens with positive focal power, a fifth lens with negative focal power, a sixth lens with positive focal power and a seventh lens with positive focal power; the magnifying lens group includes an eighth lens with positive focal power, a ninth lens with negative focal power and a tenth lens with negative focal power; the fixed lens group includes an eleventh lens with negative focal power, a twelfth lens with positive focal power and a thirteenth lens with positive focal power. And all lenses are spherical lenses.

[0006] Preferably, a low-power high-brightness module light source is used.

[0007] Preferably, the light output aperture is 110 mm.

[0008] Preferably, the total optical length is 190 mm.

[0009] Preferably, the beam angle is 56° and F / #=1.08.

[0010] Preferably, the projection angle is between 3.2° and 32°.

[0011] Beneficial effects:

[0012] The utility model can project a high-brightness picture with clear imaging by applying an optical system composed of 13 lenses. At the same time, the utility model has a multi-zoom optical system, which increases the range of variation of the light beam angle, presents a high-brightness picture with low power consumption, and is conducive to the miniaturization and lightweight realization of stage lights, thereby reducing the difficulty and cost of stage setting. In addition, sufficient space is left between the zoom lens group and the magnifying glass group for adding optical devices such as prisms, atomizers, and color filters, thereby realizing the multifunctionality of the stage light. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic diagram of the structure of the utility model;

[0014] Description of the symbols in the figure: light source 1, zoom lens group G1, magnifying lens group G2, fixed lens group G3, first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, eighth lens L8, ninth lens L9, tenth lens L10, eleventh lens L11, twelfth lens L12, thirteenth lens L13. DETAILED DESCRIPTION

[0015] The technical solution in one embodiment of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0016] See also Figure 1 A low-power stage moving head light zoom lens group, consisting of a zoom lens group G1, a magnifying lens group and a fixed lens group, wherein the zoom lens group G1, the magnifying lens group G2 and the fixed lens group G3 are placed on the same axis, starting from the light source end, they are the zoom lens group G1, the magnifying lens group G2 and the fixed lens group G3 in sequence; wherein the zoom lens group includes a first lens L1 with positive focal power, a second lens L2 with positive focal power, a third lens L3 with negative focal power, a fourth lens L4 with positive focal power, a fifth lens L5 with negative focal power, a sixth lens L6 with positive focal power and a seventh lens L7 with positive focal power; the magnifying lens group includes an eighth lens L8 with positive focal power, a ninth lens L9 with negative focal power and a tenth lens L10 with negative focal power; the fixed lens group includes an eleventh lens L11 with negative focal power, a twelfth lens L12 with positive focal power and a thirteenth lens L13 with positive focal power.

[0017] Among them, the first lens L1 is a plano-convex lens, the second lens L2 is a biconvex lens, the third lens L3 is a meniscus lens, the fourth lens L4 is a meniscus lens, the fifth lens L5 is a meniscus lens, the sixth lens L6 is a biconvex lens, the seventh lens L7 is a biconvex lens, the eighth lens L8 is a meniscus lens, the ninth lens L9 is a biconcave lens, the tenth lens L10 is a meniscus lens, the eleventh lens L11 is a biconcave lens, the twelfth lens L12 is a biconvex lens, and the thirteenth lens L13 is a biconvex lens, and all lenses are spherical lenses.

[0018] The utility model can project a high-brightness picture with clear imaging by applying an optical system composed of 13 lenses.

[0019] In this embodiment, as a preference, a low-power high-brightness module light source, such as a 200W high-brightness LED light source, is used, which can make the entire zoom lens group low-power but high-brightness, energy-saving and environmentally friendly.

[0020] In this embodiment, as a preferred embodiment, the light emitting aperture is 110 mm, which can ensure that the brightness is not too low and the cost is not too high.

[0021] In this embodiment, as a preferred embodiment, the total optical length is 190 mm. The total optical length of less than 200 mm can make the lamp body compact, light, easy to move, and reduce the cost.

[0022] In this embodiment, as a preference, the beam angle is 56°, F / #=1.08, and the beam angle is large and the aperture diameter is large, so the light flux is high and the light output is strong.

[0023] In this embodiment, as a preferred embodiment, the projection angle is between 3.2° and 32°. The 10x optical zoom range is suitable for use in KTV, stage, theater, church, dance hall, concert and other activity venues, which can ensure good light energy utilization and good and clear imaging quality.

[0024] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A low-power stage moving head light zoom lens group, which is composed of a zoom lens group, a magnifying lens group and a fixed lens group. The zoom lens group, the magnifying lens group and the fixed lens group are placed on the same axis, starting from the light source end, and are the zoom lens group, the magnifying lens group and the fixed lens group in sequence; characterized in that: The zoom lens group includes a first lens with positive focal power, a second lens with positive focal power, a third lens with negative focal power, a fourth lens with positive focal power, a fifth lens with negative focal power, a sixth lens with positive focal power and a seventh lens with positive focal power; the magnifying lens group includes an eighth lens with positive focal power, a ninth lens with negative focal power and a tenth lens with negative focal power; the fixed lens group includes an eleventh lens with negative focal power, a twelfth lens with positive focal power and a thirteenth lens with positive focal power.

2. A low-power stage moving head light zoom lens assembly according to claim 1, characterized in that: The first lens is a plano-convex lens, the second lens is a biconvex lens, the third lens is a concave-convex lens, the fourth lens is a concave-convex lens, the fifth lens is a concave-convex lens, the sixth lens is a biconvex lens, the seventh lens is a biconvex lens, the eighth lens is a concave-convex lens, the ninth lens is a biconcave lens, the tenth lens is a concave-convex lens, the eleventh lens is a biconcave lens, the twelfth lens is a biconvex lens, and the thirteenth lens is a biconvex lens, and all lenses are spherical lenses.

3. A low-power stage moving head light zoom lens assembly according to claim 1, characterized in that: Adopt low-power and high-brightness module light source.

4. A low-power stage moving head light zoom lens assembly according to claim 1, characterized in that: The light output diameter is 110mm.

5. A low-power stage moving head light zoom lens assembly according to claim 1, characterized in that: The total optical length is 190mm.

6. A low-power stage moving head light zoom lens assembly according to claim 1, characterized in that: The beam angle is 56°, F / #=1.

08.

7. A low-power stage moving head light zoom lens assembly according to claim 1, characterized in that: The projection angle is between 3.2° and 32°.

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