High concentration photovoltaic (HCPV) utilizes point-focus cost-effective plastic Fresnel lens. And a millimeter-sized
Ill-V compound multi-junction solar cell is placed underneath focusing optics which can achieve cell efficiency potential
of up to 40.7 %. The advantage of HCPV makes less solar cell area and higher efficiency; however, the acceptance angle
of HCPV is about ±1°, which is very small and the mechanical tracking of the sun is necessary. In order to reduce the
power consumption and the angle tracking error of tracking systems, a light collector model with larger acceptance angle
is designed with ZEMAX®. In this model, the original radially symmetric Fresnel lens of HCPV is replaced by
cylindrically symmetric Fresnel lens and a parabolic reflective surface. Light is collected in two dimensions separately.
And a couple of lenses and a light pipe are added before the solar cell chip in order to collect more light when sun light
deviates from incident angle of 0<sup>0</sup>. An acceptance angle of ±10° is achieved with GCR 400.