Optics: measuring and testing – By light interference – Having partially reflecting plates in series
Reexamination Certificate
2008-03-31
2011-12-13
Lyons, Michael A (Department: 2877)
Optics: measuring and testing
By light interference
Having partially reflecting plates in series
Reexamination Certificate
active
08077326
ABSTRACT:
An environmental sensing device includes an interferometric modulator which permanently actuates, in a visually-detectable manner, in response to being exposed to a predetermined environmental threshold or condition. The device can include a reactive layer, coating, or proof mass disposed on a movable member of the interferometric modulator. The reactive layer, coating, or proof mass can expand, contract, bend, or otherwise move when exposed to a predefined chemical, level of humidity, temperature threshold, type of radiation, and/or level of mechanical shock, causing the interferometric modulator to collapse and permanently indicate such exposure.
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Knobbe Martens Olson & Bear LP
Lyons Michael A
QUALCOMM MEMS Technologies Inc.
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