Small-angle Logo imaging lamp lens

Abstract

The utility model relates to the technical field of projection, in particular to a small-angle Logo imaging lamp lens which is composed of a lens group, the lens group comprises four lenses, the lens group and a module light source end are placed on the same axis, and the lens group and the module light source end are arranged on the same axis from the module light source end. The three lenses are sequentially a first lens with positive focal power, a second lens with negative focal power, a third lens with positive focal power and a fourth lens with positive focal power, the first lens is a concave-convex lens, the second lens is a concave-convex lens, the third lens is a concave-convex lens, the fourth lens is a biconvex lens, and all the lenses are common spherical lenses. According to the utility model, the projected picture is clear enough, the distortion of the projected pattern is small, the projected Logo pattern can be provided with enough size, the brightness and definition of the light spot are maximized, and the requirement of the market is better met.

Description

Technical Field

[0001] The utility model relates to the field of optical lenses, in particular to a small-angle Logo imaging light lens. Background Art

[0002] Logo imaging light is a special lighting device. Logo projection light is widely used in commercial spaces, exhibitions, performances and other occasions. It can project the company's logo on the wall or the ground, attract people's attention through the movement and change of light, and effectively promote and display the company's brand image.

[0003] At present, the common Logo imaging lamps on the market not only have unclear projection images and large distortion of the projected patterns, but also have limited projected Logo patterns. These problems are mainly determined by the lenses of the Logo imaging lamps. Although the imaging of some imaging lamp lenses has been improved, their structures are complex, their sizes are large, and their lamp bodies are bulky, which is not conducive to promotion. Therefore, in order to improve the product quality of Logo imaging lamps, it is necessary to improve the lenses of Logo imaging lamps to improve the various performances of Logo imaging lamps. Utility Model Content

[0004] The purpose of the utility model is to provide a small-angle Logo imaging light lens to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: composed of a lens group, the lens group includes four lenses, the lens group and the module light source end are placed on the same axis, starting from the module light source end, there are a first lens with positive optical focal length, a second lens with negative optical focal length, a third lens with positive optical focal length and a fourth lens with positive optical focal length, wherein the first lens is a concave-convex lens, the second lens is a concave-convex lens, the third lens is a concave-convex lens, the fourth lens is a biconvex lens, and all lenses are ordinary spherical lenses.

[0006] Preferably, the light output aperture is 46 mm.

[0007] Preferably, the total optical length is 90 mm.

[0008] Preferably, F / #=1.7.

[0009] Preferably, the projection angle is 18°.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The utility model overcomes the shortcomings of the common Logo imaging lamps on the market, such as unclear projection images, large distortion of the projected pattern, and limited size of the projected Logo pattern, and provides a small-angle Logo imaging lamp lens with a simple structure, small overall size, and light weight, which is conducive to the miniaturization and lightweight of the Logo imaging lamp, and makes up for the deficiency of unclear imaging of small-size Logo imaging lamps.

[0012] Through scientific optical design, the utility model not only projects a clear enough projection picture and a small distortion of the projected pattern, but also can provide a sufficient size for the projected Logo pattern. At the same power, the utility model has a better focusing effect at a small angle. At a projection angle of 18°, the brightness and clarity of the light spot are maximized, which better meets the needs of the market. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram of the structure of a small-angle Logo imaging light mirror assembly provided by the utility model;

[0014] Figure 2 A vertical axis aberration diagram of the small-angle Logo imaging lamp lens set provided by the utility model;

[0015] Figure 3 Axial spherical aberration diagram of the small-angle Logo imaging lamp lens assembly provided by the utility model;

[0016] Figure 4 Field curvature distortion diagram of the small-angle Logo imaging light lens set provided by the utility model;

[0017] Description of the reference numerals in the figure: module light source 1, first lens L1, second lens L2, third lens L3, fourth lens L4. DETAILED DESCRIPTION

[0018] 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.

[0019] See also Figure 1-4:A small-angle Logo imaging light lens, composed of a lens group, the lens group includes four lenses, the lens group and the module light source end are placed on the same axis, starting from the module light source 1 end, they are the first lens L1 with positive focal length, the second lens L2 with negative focal length, the third lens L3 with positive focal length, and the fourth lens L4 with positive focal length, wherein the first lens L1 is a concave-convex lens, the second lens L2 is a concave-convex lens, the third lens L3 is a concave-convex lens, and the fourth lens L4 is a double convex lens, and all lenses are ordinary spherical lenses. This solution can effectively correct the deformation and distortion of imaging, eliminate chromatic aberration, the projected image is clear enough, the projected pattern distortion is small, the brightness and clarity of the light spot are maximized, and because the optical system of a lens group and four lenses is adopted, the structure is light and simple, and it is easy to install and replace. In addition, the lens of this solution adopts a cost-effective ordinary spherical lens, which is cheap to manufacture, so the cost is low, saving costs, and thus facilitating mass production.

[0020] In this embodiment, as a preference, the light exit aperture is 46 mm. Increasing the light exit aperture of the lens can increase the amount of light passing through the lens, thereby enhancing the brightness of the projected image and improving clarity and uniformity.

[0021] In this embodiment, as a preferred embodiment, the total optical length is 90 mm. An optical total length less than 100 mm can make the lamp body lighter, shorter, more convenient to move, and reduce costs.

[0022] In this embodiment, as a preferred embodiment, F / #=1.7 is set to adapt the light emitting characteristics of the module light source, so as to achieve the best light output and project a bright and clear pattern.

[0023] In this embodiment, as a preferred embodiment, the projection angle is 18°. Considering the total optical length, light emitting aperture and efficient utilization, a small projection angle of 18° is formed, which is the most powerful and full state of light perception, and meets the needs of the market.

[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 small-angle Logo imaging light lens, characterized in that: The invention is composed of a lens group, which includes four lenses. The lens group and the light source end of the module are placed on the same axis. Starting from the light source end of the module, there are a first lens with positive optical power, a second lens with negative optical power, a third lens with positive optical power and a fourth lens with positive optical power, wherein the first lens is a concave-convex lens, the second lens is a concave-convex lens, the third lens is a concave-convex lens, the fourth lens is a biconvex lens, and all the lenses are ordinary spherical lenses.

2. The small-angle Logo imaging light lens according to claim 1, characterized in that: The light output diameter is 46mm.

3. The small-angle Logo imaging light lens according to claim 1, characterized in that: The total optical length is 90mm.

4. The small-angle Logo imaging light lens according to claim 1, characterized in that: F / #＝1.7。 5. The small-angle Logo imaging light lens according to claim 1, characterized in that: The projection angle is 18°.

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