Lens system for modifying spherical aberration

Details Lens system for modifying spherical aberration Lens system for modifying spherical aberration

G - Physics

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G02B 9/12 (2006.01) G02B 13/00 (2006.01) G02B 13/18 (2006.01) G02B 27/00 (2006.01)

Patent

CA 1082504

LENS SYSTEM FOR MODIFYING SPHERICAL ABERRATION Abstract of the Disclosure A lens system for modifying the spherical aberration of optical apparatus comprises three groups of lens elements arrayed in order along an optical axis of the apparatus: a first lens group has a negative optical power; a second lens group has substantially zero optical power and is bent to have a substantial amount of spherical aberration; and a third lens group has a positive optical power. The relative spacing between the second lens group and the first and third lens groups is variable to modify the spherical aberration introduced into the optical apparatus. -1-

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