led two-way collimator lens

Abstract

The invention discloses an LED two-directional collimating lens, and relates to an LED lens. The LED two-directional collimating lens is an entity consisting of a first curved surface, a second curved surface, a third curved surface, a fourth curved surface, a fifth curved surface, a sixth curved surface, a seventh curved surface, an eighth curved surface, a ninth curved surface, a tenth curved surface, an eleventh curved surface and a twelfth curved surface, wherein the first curved surface is a rotationally symmetric free curved surface; the second curved surface is a semicircular plane; the third curved surface is a rotationally symmetric free curved surface based on a total reflection principle; the fourth curved surface is a total reflection curved surface; the fifth curved surface is a horizontal plane; the sixth curved surface is a non rotationally symmetric free curved surface; the seventh curved surface, the eighth curved surface, the eleventh curved surface and the twelfth curved surface are planes not participating in control of a light ray direction; the ninth curved surface is a front plane of a lens body; and the tenth curved surface is a rear plane of the lens body. The LED two-directional collimating lens is high in light ray control capacity, and can realize two-directional collimating similarly rectangular light beams and keep relatively good lighting effect.

Description

technical field [0001] The invention relates to an LED lens, in particular to an LED bidirectional collimator lens. Background technique [0002] As a new type of light source, LED has become a perfect substitute for traditional light sources such as incandescent lamps and fluorescent lamps due to its high luminous efficiency, long life, and non-toxicity. However, since the light intensity distribution of LED is a circular Lambertian distribution, if it is directly applied to lighting, it will form an extremely uneven illuminance distribution on the target surface, which cannot meet the optical performance requirements of various lighting occasions for lamps. In order to make LEDs better used in the lighting field, it is necessary to design a secondary optical system to redistribute the light intensity distribution of LEDs so that it can form a uniform or other specific illuminance distribution on the target surface. [0003] In visible light guidance applications such as s...

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