Zoom lens barrel with focusing path and focal length switching path
October 10, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3897998 Adjustable mounting device for optics lens systems Zoom lens system Compact zoom lens barrel with high zooming ratio Arrangement for adjusting a member in a lens barrel for effecting a zooming function zoom lenses Zoom lens device Macro zoom lens barrel Zoom lens Zoom lens assembly One-hand zoom lens barrel InventorsAssigneeApplicationNo. 684941 filed on 10/10/2000US Classes:359/701, Cam ring type or zoom ring type359/700Cam groove typeExaminersPrimary: Mack, RickyAttorney, Agent or FirmForeign Patent References
International ClassG02B 015/14Foreign Application Priority Data1993-04-19 JPAbstractA zoom lens barrel in which a zoom lens is switched to a plurality of focal lengths by a moving member by which a plurality of lens groups are moved in the direction of optical axis. After a desired focal length has been selected, a focusing operation is conducted by the moving member. At least two lens groups, which are moved for switching focal lengths, are moved while a distance between lens groups is being changed so that the focusing operation can be conducted.Other References
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