Two position variable focal length lens

Details Two position variable focal length lens Two position variable focal length lens

2005-03-29

2005-03-29

Dang, Hung X. (Department: 2873)

Optical: systems and elements

Lens

Including a nonspherical surface

C359S740000

Reexamination Certificate

active

06873473

ABSTRACT:
A two position variable focal length lens is provided. The variable focal length lens includes a common lens element moveably positioned on an optical axis; a wide angle lens element moveable between a first location removed from the optical axis and a first position on the optical axis on an image side of the common lens element; and a telephoto lens element moveable between a second location removed from the optical axis and a second position on the optical axis on the image side of the common lens element. A magnification ratio change is effected by moving the common lens element along the optical axis and switching between the wide angle lens element located at the first position on the optical axis and the telephoto lens element located at the second position on the optical axis.

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