Lens and lighting device with same

Abstract

Disclosed is a lens. The lens comprises an in-light surface and an out-light surface. The out-light surface comprises a first curved surface, a first convex surface, a second convex surface, a second curved surface and a third curved surface. The first curved surface is located at the center of the out-light surface, the first convex surface and the second convex surface are arranged on two opposite sides of the first curved surface along a first direction, the second curved surface and the third curved surface are arranged on two opposite sides of the first curved surface along a second direction, and the first direction is vertical to the second direction. The middle of a connecting position of the second curved surface and the first curved surface forms a concave surface. The in-light surface comprises a first concave-curved surface, a second concave-curved surface and a third concave-curved surface. The first concave-curved surface, the second concave-curved surface and the third concave-curved surface are ellipsoid surfaces. The second concave-curved surface and the third concave-curved surface are disposed in the first concave-curved surface and connected with each other, long axes of the first concave-curved surface and the third concave-curved surface are parallel to the second direction, and a long axis of the second concave-curved surface is parallel to the first direction. The invention further relates to a lighting device with the lens.

Description

technical field [0001] The invention relates to the field of optics, in particular to a lens and an illuminating device with the lens. Background technique [0002] At present, most light sources, such as light-emitting diodes, discharge lamps, and halogen lamps, have a certain divergence angle. If they are to be used for lighting, it is generally necessary to install a lens in front of these light sources to adjust the divergence angle of the light so that Meet lighting range needs. Most of the lighting areas formed by the current lighting devices are circular. In some lighting occasions, resources are wasted, which is not conducive to energy saving and emission reduction. For example, tunnel lighting. If the light field of the tunnel light is circular, part of the light will shine Outside the scope of the road, it will not only cause waste of resources but also may cause wrong traffic guidance. In this way, it is required that the lighting area formed by the tunnel lights...

AI Technical Summary

Problems solved by technology

Most of the lighting areas formed by the current lighting devices are circular. In some lighting occasions, resources are wasted, which is not conducive to energy saving and emission reduction. For example, tunnel lighting. If the light field of the tunnel light is circular, part of the light will shine Outside the scope of the road, it will not only cause waste of resources but also may cause wrong traffic guidance. In this way, it is required that the lighting area formed by the tunnel lights should be roughly rectangular, with a larger lighting length in the direction along the tunnel, and a larger lighting length in the direction perpendicular to the tunnel lights. The direction of the tunnel has a small lighting length to effectively use the light energy of the lighting device

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