Patent ID: 8254736

Claim:
A prism array for collecting light, comprising: a first prism module, comprising: a first guiding prism, comprising a first light entering surface, a first reflective surface, a first light collecting surface, a first light outputting surface and a first light emitting surface, wherein the light enters the first guiding prism through the first light collecting surface, is reflected by the first reflective surface, and leaves the first guiding prism through the first light emitting surface; at least one first reflective prism close to the first light emitting surface, wherein a light travels from the first light emitting surface to the first reflective prism, and is reflected thereby; and a second guiding prism, comprising a second light entering surface, a second reflective surface, a second light collecting surface, a second light outputting surface and a second light emitting surface, wherein the light enters the second guiding prism through the second light collecting surface, is reflected by the second reflective surface, leaves the second guiding prism through the second light emitting surface, and passes through the first guiding prism to the first reflective prism, and a coupling joint, comprising a first light pipe, a second light pipe, a third light pipe and a light transmitting pipe, wherein the first light pipe, the second light pipe and the third light pipe are coupled to an end of the light transmitting pipe, the first light pipe corresponds to the first light outputting surface, the third light pipe corresponds to the first reflective prism, and the light travels from the first reflective prism, passing through the third light pipe to the light transmitting pipe.