Visible light LED wireless communication light receiving antenna
A technology of light-emitting diodes and light-receiving antennas, used in optical fiber radio, optical fiber transmission, electromagnetic wave transmission systems, etc., can solve the problems of limiting the size of light-receiving antennas, unable to meet small size requirements, and high receiver noise, and achieve good light reception. effect, good short focus convergence effect, the effect of widening the reception angle and range
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[0018] An optical receiving antenna for wireless optical communication proposed by the present invention consists of a main Fresnel lens and several secondary Fresnel lenses bonded to form a "table-shaped" structure. The top surface of the "terrace" is a regular polygonal main Fresnel lens made of PMMA material or other optical materials, and its side is surrounded by multiple secondary Fresnel lenses of the same shape that are symmetrical to the center of the main Fresnel lens. combined.
[0019] see figure 1 Shown example, this receiving antenna main body is made of Fresnel lens, comprises a main Fresnel lens 1, several Fresnel lenses 2 and photodetector 5, and described main Fresnel lens 1 is regular polygon; So Each sub-Fresnel lens 2 is bonded with the main Fresnel lens 1 at a fixed angle, and at the same time, it is symmetrical with the axis of the main Fresnel lens 1 and bonded to each other; the main Fresnel lens 1 and each sub-Fresnel lens The Neil lens 2 forms a "m...
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