High speed focusing lens assembly

Details High speed focusing lens assembly High speed focusing lens assembly

1991-03-15

1992-08-11

Ben, Loha

Optical: systems and elements

Lens

With support

359824, 369 4416, G02B 702

Patent

active

051384973

ABSTRACT:
A focusing lens assembly comprises a magnetic support member carrying a first lens, with a magnetic flange extending outwardly therefrom. A nonmagnetic axial spacer connects the first flange to a second nonmagnetic flange which supports a second, movable lens. Sheet flexure members are provided for supporting the second lens within a central opening in the second flange coaxially of the first lens and axially spaced from the end of the support member for substantially only axial movement of the second lens with respect to the first lens. A drive bobbin is provided for moving the second lens axially having a portion which circumscribes the end of the support member in a non-contacting relationship therewith. A magnet is provided for generating a magnetic field across the circumscribing portion of the drive bobbin, and an electric current carrying coil is provided on the circumscribing portion of the drive bobbin so that when a current is introduced into the current carrying coil it interacts with the magnetic field to move the second lens axially.

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