Gallium Arsenide (GaAs) is a compound of the elements gallium and arsenic. It is a III/V semiconductor, and is used in the manufacture of devices such as microwave frequency integrated circuits, monolithic microwave integrated circuits, infrared light-emitting diodes, laser diodes, solar cells, and optical windows. Lens type:plano-convex. Edge thickness : about 2.2mm. Diameter 18mm, 19mm, 20mm. Focal Length 1" to 4".
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