Lens for light-emitting diode (LED) lighting device and LED lighting device with lens
A technology of LED lighting and lens, which is applied to the components of lighting devices, lighting devices, lighting and heating equipment, etc., can solve the problems that cannot meet the lighting requirements of fuel pumps, and achieve the effect of ensuring symmetry
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[0036] figure 1 A three-dimensional perspective view of a lens according to a first embodiment of the invention is shown. It can be seen from the figure that the lens has a bottom surface 1 and an exit surface 2 raised on the bottom surface 1 . A recessed area 3 is formed in the center of the bottom surface 1 , and the surface of the recessed area 3 forms an incident surface 4 , where the light source (not shown) of the LED lighting device is disposed. It can be further seen in the figure that the incident surface 4 includes four first, second, third and fourth concave portions 4a1, 4a2, 4a3, 4a4 that are recessed away from the light source, and the adjacent first, second, third and The fourth concave surface parts 4a1, 4a2, 4a3, 4a4 transition smoothly, wherein the first, second, third and fourth concave surface parts 4a1, 4a2, 4a3, 4a4 respectively project a butterfly-wing tip-shaped profile in the bottom surface 1 ( see figure 2 ). In addition, adjacent first, second, ...
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