Multi-field arranging method of led chips under single lens

A multi-field arranging method of LED chips under a single lens, the method comprising steps of:

• setting a first concentric circle on a bottom of a hemispherical lens, wherein the first concentric circle is centered at an axis of the hemispherical lens;
• arranging at least three first LED chips having a first vertical divergence angle on the first concentric circle, wherein the first LED chips are arranged equidistantly;
• setting a second concentric circle on the bottom of the hemispherical lens, wherein the second concentric circle is centered at the axis of the hemispherical lens, and the second concentric circle is larger than the first concentric circle in radius;
• and
• arranging at least three second LED chips and at least three third LED chips, wherein each said second LED chip has a second vertical divergence angle and each said third LED chip has a third vertical divergence angle;
• wherein the first vertical divergence angle is smaller than the second vertical divergence angle or the third vertical divergence angle, and the second vertical divergence angle does not equal to the third vertical divergence angle.