High-performance 512 x 512 scene projector for targets against space backgrounds

Cole, Barry E.; Han, C. J.; Higashi, Robert E.; Pritchett, Donald G.; Sawyer, B.; Old, Thomas E.; Goldsmith, George C.; Edwards, David G.; Stockbridge, Robert G.; Jones, Lawrence E.

doi:10.1117/12.177936

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“…The wafers contain radhard RJCMOS* underlayer electronics to enable row-column addressing with RS-232 protocol. A complete description of the design and process involved in making the igniter wafers can be found elsewhere" 11 . Figure 10 shows an optical photograph of a 4" silicon wafer containing four (4) 512 x 512 arrays, eight (8) 128 x 128 arrays, and a handful of smaller tes: structures.…”

Section: Processingmentioning

confidence: 99%

MEMS Mega-Pixel Micro-Thruster Array

Youngner¹

2000

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the ti gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comm collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Direc Davis Highway, Suite 1204, Arlington, VA 22202-4302, and small satellites flying in clusters require periodic "stationkeeping" to keep them in f lace. The required impulse is very small -the goal is not to keep the individual satellites in rigid formation, but only to keep them in well-defined orbitals with respect to one another. The necessary impulse, therefore, is only the amount needed to overcome the difference in drag between the most-affected and the least-affected satellites in the cluster. Estimates are that the differential drag can be overcome by providing -1 uNsec (micro-Newton second) to -1 mN sec (milli-Newton gecond) every 10 to 100 seconds throughout each satellite's mission. The system we are developing will do that. The thrusters have very low power and energy thresholds for ignition ( -10 mWatts, -100 Joules), and no moving parts so they are expected to be highly reliable. A single thruster array contains a quarter of a million separate thrusters. 068 SUBJECT TERMSMicro-propulsion. Micro-satellites, Nano-satellites, Pico-satellites, MEMS. Abstract. Small satellites flying in clusters require periodic "stationkeeping" to keep them in place. The required impulse is very small -the goal is not to keep the individual satellites in rigid formation, but only to keep them in well-defined Orbitals with respect to one another. The necessary impulse, therefore, is only the amount needed to overcome " e difference in drag between the most-affected and the least-affected satellites in the cluster. NUMBER OF PAGESEstimates are that the differential drag can be overcome by providing -1 |iNsec (micro-Newton second) to -1 mN sec (mi'li-Newton second) every 10 to 100 seconds throughout each satellite's mission. The system we are developing will do that. The thrusters have very low power and energy thresholds for ignition (-10 mWatts, -100 uJoules), and no moving parts so they are expected to be highly reliable. A single thruster array contains a quarter of a million separate thrusters.

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Section: Processingmentioning

confidence: 99%

MEMS Mega-Pixel Micro-Thruster Array

Youngner¹

2000

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High-performance 512 x 512 scene projector for targets against space backgrounds

Cited by 1 publication

References 0 publications

MEMS Mega-Pixel Micro-Thruster Array

MEMS Mega-Pixel Micro-Thruster Array

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