EntityQ7078895· pop 5· linked from 13 articlesoff-axis optical systemSign in to saveConnectionsInternational Standard Book NumberEntityopticsEntitydigital object identifierEntityreflecting telescopeEntityapertureEntityQ22908627Entityoptical axisEntityhyperspectral imagingEntityGeneral Services AdministrationEntitycopyright status of works by the federal government of the United StatesEntityCategoriesGeometrical optics