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公开(公告)号：US10408674B2
公开(公告)日：2019-09-10
申请号：US16352243
申请日：2019-03-13
发明人： James Dillon Kiely , John Charles Duda , Patrick Carl Fletcher , Andrei Dorobantu , Jon D. Trantham
摘要： An apparatus comprises a light source configured to generate light, and a modulator coupled to the light source and configured to modulate the light above a predetermined frequency. A slider is configured for heat-assisted magnetic recording and to receive the modulated light. A resistive sensor is integral to the slider and subject to heating by absorption of electromagnetic radiation and conduction of heat. Measuring circuitry is coupled to the resistive sensor and configured to measure a response of the resistive sensor due to absorbed electromagnetic radiation and not from the heat conduction. The measuring circuitry may further be configured to determine output optical power of the light source using the measured resistive sensor response.
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公开(公告)号：US09978412B1
公开(公告)日：2018-05-22
申请号：US15337308
申请日：2016-10-28
发明人： Declan Macken , Patrick Carl Fletcher , Song Chen
IPC分类号： G11B11/00 , G11B5/60 , G11B5/31 , G11B5/00 , G11B7/1387 , G11B11/105
CPC分类号： G11B5/6088 , G11B5/314 , G11B7/1387 , G11B11/10543 , G11B2005/0021
摘要： A slider is configured for heat-assisted magnetic recording and comprises an NFT and a transparent thermocouple configured to produce a signal indicative of temperature at the NFT. A detector can be coupled to the thermocouple and configured to detect one or both of spacing changes and contact between the slider and a magnetic recording medium.
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公开(公告)号：US20190212192A1
公开(公告)日：2019-07-11
申请号：US16352243
申请日：2019-03-13
发明人： James Dillon Kiely , John Charles Duda , Patrick Carl Fletcher , Andrei Dorobantu , Jon D. Trantham
CPC分类号： G01J1/4257 , G01K7/16
摘要： An apparatus comprises a light source configured to generate light, and a modulator coupled to the light source and configured to modulate the light above a predetermined frequency. A slider is configured for heat-assisted magnetic recording and to receive the modulated light. A resistive sensor is integral to the slider and subject to heating by absorption of electromagnetic radiation and conduction of heat. Measuring circuitry is coupled to the resistive sensor and configured to measure a response of the resistive sensor due to absorbed electromagnetic radiation and not from the heat conduction. The measuring circuitry may further be configured to determine output optical power of the light source using the measured resistive sensor response.
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公开(公告)号：US10240975B2
公开(公告)日：2019-03-26
申请号：US15190462
申请日：2016-06-23
发明人： James Dillon Kiely , John Charles Duda , Patrick Carl Fletcher , Andrei Dorobantu , Jon D. Trantham
摘要： An apparatus comprises a light source configured to generate light, and a modulator coupled to the light source and configured to modulate the light above a predetermined frequency. A slider is configured for heat-assisted magnetic recording and to receive the modulated light. A resistive sensor is integral to the slider and subject to heating by absorption of electromagnetic radiation and conduction of heat. Measuring circuitry is coupled to the resistive sensor and configured to measure a response of the resistive sensor due to absorbed electromagnetic radiation and not from the heat conduction. The measuring circuitry may further be configured to determine output optical power of the light source using the measured resistive sensor response.
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5.发明授权公开(公告)号：US09916847B1
公开(公告)日：2018-03-13
申请号：US15153103
申请日：2016-05-12
发明人： Steven Douglas Granz , Michael Thomas Johnson , Patrick Carl Fletcher , Manuel Charles Anaya-Dufresne , Peng Peng
IPC分类号： G11B11/00 , G11B5/455 , G11B5/00 , G11B7/1263 , G11B11/105 , G11B5/60 , G11B7/1267 , G11B7/126
CPC分类号： G11B5/455 , G11B5/6088 , G11B7/126 , G11B7/1263 , G11B7/1267 , G11B11/10506 , G11B11/1051 , G11B2005/0021
摘要： An apparatus comprises a thermal sensor configured to interact with a magnetic recording disk. A head-disk interface is defined between the thermal sensor and the disk. A power supply is coupled to the thermal sensor and configured to supply a bias power to the thermal sensor between a low power and a high power. A processor is coupled to the thermal sensor and configured to determine a slope of a resistance response of the thermal sensor. The processor is further configured to detect a change in the slope relative to a baseline slope. The slope change indicates increased heat sinking between the thermal sensor and the disk due to the presence of contaminant buildup at the head-disk interface.
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公开(公告)号：US20170370770A1
公开(公告)日：2017-12-28
申请号：US15190462
申请日：2016-06-23
发明人： James Dillon Kiely , John Charles Duda , Patrick Carl Fletcher , Andrei Dorobantu , Jon D. Trantham
IPC分类号： G01J1/42
CPC分类号： G01J1/4257 , G01K7/16
摘要： An apparatus comprises a light source configured to generate light, and a modulator coupled to the light source and configured to modulate the light above a predetermined frequency. A slider is configured for heat-assisted magnetic recording and to receive the modulated light. A resistive sensor is integral to the slider and subject to heating by absorption of electromagnetic radiation and conduction of heat. Measuring circuitry is coupled to the resistive sensor and configured to measure a response of the resistive sensor due to absorbed electromagnetic radiation and not from the heat conduction. The measuring circuitry may further be configured to determine output optical power of the light source using the measured resistive sensor response.
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