Thin lens

Abstract

The invention relates to a lens, and especially relates to a lens for lighting. The lens comprises a curved surface part, an outer periphery and a toothed grain part. The curved part in the center region includes at least one curved surface, and the outer contour of the curved surface part is non-circular. The outer periphery surrounds the curved surface part. The toothed grain part between the curved surface part and the outer periphery includes a concave-convex grain area. The concave-convex grain area is provided with a concave-convex grain surface which extends outward around a center, and the center of the concave-convex grain area is in the center region. The beneficial effect is that through combination of the curved surface part and the toothed grain part, a uniform light mixing effect is achieved, and wide-angle light can be converged to improve the intensity of illumination in the center. The curved surface part can improve the light output efficiency and reduce light loss.

Description

technical field [0001] The present invention relates to a lens, in particular to a lens for lighting. Background technique [0002] The application of the known Fresnel lens (Fresnellens) in the flashlight of the camera lens, as disclosed in the US8729571 patent, is to be arranged in pairs on two LED lamps with predetermined intervals respectively, so that the light is directed to a predetermined direction. The thickness of the Nelle lens is quite thin, which is especially suitable for portable electronic devices, such as mobile phones or tablet computers. [0003] Since the above-mentioned Fresnel lens is generally cut and thinned in the shape of a convex lens, the optical performance of the above-mentioned Fresnel lens is like a convex lens, and it can only simply condense the light emitted by the LED lights to a specific area. As a result, the light pattern of these LED lamps adjusted by the above-mentioned Fresnel lens is quite simple, and it is difficult to effectively...

AI Technical Summary

Problems solved by technology

[0003] Since the above-mentioned Fresnel lens is generally cut and thinned in the shape of a convex lens, the optical performance of the above-mentioned Fresnel lens is like a convex lens, and it can only simply condense the light emitted by the LED lights to a specific area. As a result, the light pattern of these LED lamps adjusted by the above-mentioned Fresnel lens is quite simple, and it is difficult to effectively change the light angle, and the above-mentioned Fresnel lens cannot effectively mix the light of these LED lamps evenly. In addition, because the LED lamps The lamp is a surface light source. After passing through the center of the Fresnel lens, the stray light is difficult to be guided to the intended place to be illuminated, resulting in loss of light. Therefore, the design of the above-mentioned Fresnel lens structure needs to be improved.

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