Zoom optical system, and imaging apparatus incorporating the same
AssigneeOlympus Imaging Corp.
InventorKanato Adachi
Life of this patent
Estimating the term…
Abstract
The invention provides a zoom optical system comprising at least three lens groups and designed to implement zooming by varying a separation between the respective lens groups. The zoom optical system includes, on an image plane side with respect to a stop, a lens group comprising a plurality of lenses and having positive refracting power throughout. The lens group having positive refracting power includes an air double-convex positive lens in it.
Claims8
A zoom optical system, comprising at least three lens group and designed to implement zooming by varying a separation between the respective lens groups, which includes, on an image plane side with respect to a stop, a lens group comprising a plurality of lenses and having positive refracting power throughout, wherein the lens group having positive refracting power includes an air double-convex positive lens.
Dependencies are inferred from the claim text.