Dual field of view lens system

Details Dual field of view lens system Dual field of view lens system

2007-12-11

2007-12-11

Harrington, Alicia M. (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

Reexamination Certificate

active

11422765

ABSTRACT:
A dual field of view lens system comprising a first lens group aligned along an optical axis and a third lens group aligned along the optical axis and positioned a predetermined distance from the first lens group. A second lens group, having an optical stop attached thereto, is aligned along the optical axis and disposed between the first and third lens groups such that the second lens group and the optical stop are moveable along the optical axis between a first position and a second position. Positioning the second lens group and the optical stop in the first position provides a wide field of view and moving the second lens group and the optical stop to a second position provides a narrow field of view.

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