NOVELTY - Fabrication device comprises solar energy collector array of collector elements (100) employed in variably transparent solar collector panel to be utilized in predominantly vertical orientation comprises crescent shaped solar collector elements to maximize solar energy collected from concentrated sunlight via complementary adjacent solar concentrator; where collector element shape is based on direction of installation relative to the sun's path through sky, at the latitude of installation, during the daytime cycle in all seasons.    USE - As variable optical density solar collector used in vertical orientation and in synergy with adjacent, complementary solar concentrator of solar cell, used in solar panels positioned at building windows.    ADVANTAGE - The device provides a transparent solution for efficient, reliable, low maintenance solar energy production within windows, whether vertical or otherwise. The novel crescent shaped solar collector element is optimized for use with asymmetric aspheric concentrator lenses, based on the direction of the installation relative to the sun's path through the sky at the latitude of the installation during the daytime cycle in all seasons. This solar element shape uses the minimum material which also produces the best electrical signal to noise ratio for a solar collector.    DETAILED DESCRIPTION - Fabrication device for collection of solar energy; solar energy collector array of collector elements (100) employed in variably transparent solar collector panel to be utilized in predominantly vertical orientation comprises solar collector elements to maximize solar energy collected from concentrated sunlight via complementary adjacent solar concentrator, whose concentrating elements correspond in size and location to the collector elements; the number, configuration, orientation of collector elements, and density in the solar collector array, may be varied from one area of the array to another providing varied light transmission and transparency; collector element shape is based on direction of installation relative to the sun's path through sky, at the latitude of installation, during the daytime cycle in all seasons, comprising solar collector elements, each having crescent shape; the length of each solar collector element is determined by travel length of the focal spot from the sun traced on collector panel through corresponding adjacent concentrator element at summer solstice for the latitude of installation; width of each solar collector element is determined by focal spot from the sun on collector panel through corresponding adjacent concentrator element, the width of each collector element is determined by focal spot traced throughout the year at the latitude of installation. An INDEPENDENT CLAIM is included for method of fabrication for variably transparent solar collection arrays involving forming first conductive layer overlying transparent or semitransparent substrate; depositing photovoltaic semiconductor layers overlying the conductive layer; forming P-N or N-P junction layer; applying second conductive layer overlying the prior structure; then applying mask to structure describing the array of collector cells and connections between them; etching all unmasked material above the substrate by photolithography or laser ablation, exposing collector elements, connections and contacts; connecting the collector elements and forming complete electrical circuit; depositing optionally transparent or semitransparent electrically insulating material over the entire area, filling voids between collector elements and providing thin transparent or semitransparent protective layer over the structure.    DESCRIPTION OF DRAWING(S) - The figure shows cross-sectional diagram of single crescent shaped solar collector element.    Collector element (100)    P-N or N-P junction (120)    First conductive layer (130)    Cell connectors (140)