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公开(公告)号：US5703727A
公开(公告)日：1997-12-30
申请号：US279059
申请日：1994-07-22
IPC分类号： G02B7/10 , G02B15/177 , G02B25/00 , G02B27/02 , G02B15/14
CPC分类号： G02B25/008 , G02B7/10
摘要： A zoom lens is described which is quite simple and yet provides a wide (5:1) zoom range. The lens consists of a front focusing negative lens which provides a stationary virtual image for two rear zooming lens groups. These two zooming groups are positive and reimage the object at a camera pickup device. Such zooming groups are of substantially equal focal length and bear equally in the magnification change. The invention includes a magnifier which utilizes the zoom lens and has the mechanical aspects necessary to provide the needed lens motions.
摘要翻译： 描述了一种变焦镜头，它非常简单，但提供了宽（5：1）的变焦范围。 透镜由前聚焦负透镜组成，为两个后变焦镜头组提供静态虚像。 这两个缩放组是正的，并且在相机拾取装置处重新对对象进行成像。 这种变焦组具有基本相等的焦距并且在放大变化中同样地承受。 本发明包括利用变焦透镜并具有提供所需透镜运动所需的机械方面的放大镜。
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公开(公告)号：USD430588S
公开(公告)日：2000-09-05
申请号：US108931
申请日：1999-08-04
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公开(公告)号：USD297327S
公开(公告)日：1988-08-23
申请号：US810396
申请日：1985-12-17
申请人： W. Andrew Morrison
设计人： W. Andrew Morrison
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公开(公告)号：US4001679A
公开(公告)日：1977-01-04
申请号：US551138
申请日：1975-02-19
CPC分类号： G01R1/06788
摘要： A test probe for effecting temporary electrical connection to circuit terminals of miniature integrated circuits or like elements with small inter-terminal spacings. The probe has an insulative tip having a cross-sectional dimension smaller than the space between adjacent terminals. In an axially extending groove in the tip is a stiff wire, and a mechanism is provided for controllably moving the wire out of the groove after the tip has been inserted between two terminals. When the wire moves out of the groove, it contacts one of the electric terminals and wedges the insulative tip against the adjacent terminal so as to retain the probe in place.
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