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公开(公告)号：US3842407A
公开(公告)日：1974-10-15
申请号：US26787772
申请日：1972-06-30
Applicant: IBM
Inventor： ARGYLE B , DISTEFANO T
CPC classification number: G11C19/0866 , G01R33/02 , G11B5/00
Abstract: A sensor for detection of magnetic bubble domains in which the domains are oscillated in size to cause a change in a detector coupled to the domains. In one embodiment, the oscillator is a conductor loop driven by an electrical source to oscillate a domain therein, and the detector is a circuit connected to the conductor loop and responsive to the change in self-inductance of the loop, due to a difference in the amount of magnetic flux coupling the loop as the domain oscillates. Another embodiment uses the change in capacitance between conducting plates as an indication of the presence of a domain. Still another embodiment uses the change in amount of light passing through an oscillating domain as an indication of the presence of a domain.
Abstract translation: 用于检测磁泡区域的传感器，其中域的大小振荡以引起耦合到域的检测器的变化。 在一个实施例中，振荡器是由电源驱动以在其中振荡域的导体回路，并且检测器是连接到导体回路的电路，并且响应于环路的自感的变化，由于 随着域振荡，耦合环路的磁通量。 另一实施例使用导电板之间的电容变化作为域的存在的指示。 另一个实施例使用通过振荡域的光量的变化作为域的存在的指示。
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公开(公告)号：BR7807553A
公开(公告)日：1979-07-24
申请号：BR7807553
申请日：1978-11-17
Applicant: IBM
Inventor： DISTEFANO T , KUHN L
Abstract: A xerographic printer/copier includes a photoconductor drum (4), means for producing a latent image, from an original document, on the drum and a laser beam scanning system (24, 25, 28 and 27) normally employed to produce such a latent image in response to input digital data. The system also includes a detector (30) placed adjacent the photoconductor drum at the laser scanning position. This detector is employed to produce signals representing a latent image on the drum produced by sensing the change in charge on the drum when the latent image is scanned by the laser beam (26) in an unmodulated condition.
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