Light emitting module and image surveillance device thereof
A light emitting module includes a lens and first and second light sources aligning with the lens. The lens includes a first biconcave section having a first light-entrance concave surface and a first light-exit concave surface, a second biconcave section having a second light-entrance concave surface and a second light-exit concave surface, and a shared section having a light-exit shared surface. A tangent slope of the shared section where the light-exit shared surface is connected to the first light-exit concave surface is less than a tangent slope of the first biconcave section where the first light-exit concave surface is connected to the light-exit shared surface. A tangent slope of the shared section where the light-exit shared surface is connected to the second light-exit concave surface is larger than a tangent slope of the second biconcave section where the second light-exit concave surface is connected to the light-exit shared surface.
VIVOTEK INC.
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G08B H04N F21V G08B F21V F21V F21Y F21Y
inventional inventional additional inventional inventional inventional additional additional
Chih-Hung Li-Shan Yi-Hsin Chih-Chung
Chang Shih Yeh Wang