公开(公告)号：US20190219779A1

公开(公告)日：2019-07-18

申请号：US15873143

申请日：2018-01-17

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Leonid A. Beresnev ,  Anthony R. Valenzuela ,  Chatt C. Williamson

IPC: G02B6/42 ,  H01S3/00 ,  G02B6/26 ,  G02B7/02 ,  G02B6/32 ,  G02B27/40

CPC classification number: G02B6/4225 ,  G02B6/262 ,  G02B6/32 ,  G02B6/4227 ,  G02B6/4296 ,  G02B7/02 ,  G02B27/40 ,  H01S3/005 ,  H01S3/06708 ,  H01S3/11 ,  H05H1/46

Abstract: A technique for delivery of a divergent laser beam emitted with a free-space laser fiber facet, the beam having an optical power, into an optical waveguide. An optical axis of the laser beam is aligned approximately along a propagation Z direction into the optical waveguide. The fiber facet is located in a first plane perpendicular to the Z direction. The waveguide includes an input, direction, and X-Y position of the input in a second plane. The waveguide includes fluctuations in a X-Y-Z position of the input and fluctuations in direction. The laser beam is transformed into a collimated beam by re-directing a propagation of the laser beam, shifting the laser beam parallel to the Z direction, and focusing the laser beam into the input. The speed of transformation of the laser beam is greater than an instant speed of the fluctuations. A maximum optical power is delivered into the waveguide.

公开(公告)号：US10352987B2

公开(公告)日：2019-07-16

申请号：US15615861

申请日：2017-06-07

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Richard L. Thomas, Jr.

IPC: G01R31/26 ,  G01R31/327 ,  G01R31/319

Abstract: A solid state switch power emulator circuit, the circuit including a high voltage section including a high voltage power supply (HVPS); a high voltage capacitor (HVC) electronically connected to the HVPS in parallel; a high voltage switch (HVS) electronically connected to the HVC and the HVPS in series; and a high voltage load (HVL) electronically connected to the HVS in series; a low voltage section including a low voltage power supply (LVPS); a low voltage capacitor (LVC) electronically connected to the LVPS in parallel; a low voltage switch (LVS) electronically connected to the LVPS and the LVC in series; a low voltage load (LVL) electronically connected to the LVS in series; and a high voltage diode (HVD) electronically connected to the LVL in series, wherein voltage levels associated with the low voltage section are less than voltage levels associated with the high voltage section.

公开(公告)号：US20190055632A1

公开(公告)日：2019-02-21

申请号：US15678573

申请日：2017-08-16

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： John F. Chinella

IPC: C22C38/00 ,  C22C38/44 ,  C22C38/04 ,  C22C38/30 ,  C21D8/02

Abstract: A low alloy high nitrogen steel includes iron and, by weight 0.14-0.60% nitrogen (N); 0.08-0.28% carbon (C); 0.10-2.20% nickel (Ni); 0.25-2.00% manganese (Mn); 1.20-2.70% chromium (Cr); 0.45-1.50% tungsten (W); not more than 0.05% molybdenum (Mo); not more than 0.02% vanadium (V); not more than 0.60% silicon (Si); not more than 0.10% copper (Cu); not more than 0.02% titanium (Ti); not more than 0.02% niobium (Nb); not more than 0.008% aluminum (Al); and not more than 0.02% of any other element with not more than 0.10% total other elements, wherein cobalt (Co) is substitutable for any part of the nickel.

公开(公告)号：US20190017764A1

公开(公告)日：2019-01-17

申请号：US15451542

申请日：2017-03-07

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Alex Michlin

IPC: F41A15/14 ,  F41A21/12

Abstract: A system for reducing an extraction force required for removing a spent munition cartridge case from a weapon after firing, the system including a chamber; and a plurality of movable components in the chamber that are configured to radially expand with a corresponding expansion of a fired munition cartridge case, wherein radial expansion of the plurality of movable components causes a rearward force on the plurality of movable components and the spent munition cartridge case. The chamber may include a tapered wall, and the plurality of movable components may matingly align with the tapered wall. The plurality of movable components may align with one another. Each movable component may include a tapered outer surface comprising an angle greater than an angle of an outer surface of a pre-fired cartridge case.

公开(公告)号：US10178888B2

公开(公告)日：2019-01-15

申请号：US15366578

申请日：2016-12-01

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Eric Dean Wetzel ,  Greg Allan Thompson ,  Jared Michael Gardner ,  Patrick Michael Toal, Jr. ,  Thomas Anthony John Plaisted ,  David Stanley Lowry

IPC: A42B3/06 ,  A42B3/12 ,  A42B3/04 ,  A63B71/10

Abstract: A head restraint system having a rate sensitive device to connect a head restraint to a body of a user. The head restraint system includes a first connector to connect to the head of a user, a second connector connected to the first connector and to a body of the user, wherein one of the first connector and the second connector includes a rate sensitive (RS) device, wherein the first connector and the second connector are configured to restrain the user's head to the user's body at high speed motion of the user's head relative to the user's body and otherwise not restrain the user's head.

公开(公告)号：US10178813B2

公开(公告)日：2019-01-08

申请号：US15416495

申请日：2017-01-26

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Lauren M. Boteler ,  Damian P. Urciuoli

IPC: H05K7/20 ,  H02M3/158

Abstract: A power module including a plurality of power die layers including power electronic components; a plurality of heat sink components operatively connected to multiple sides of each power electronic component; a plurality of electrically conductive layers contacting the plurality of heat sink components, wherein a power die layer and an electrically conductive layer sequentially alternate to form a stacked structure such that both ends of the stacked structure includes an end electrically conductive layer. A cooling path is integrated with each layer in the stacked structure. A housing unit houses the stacked structure. The power electronic components may include heat-producing electronic devices. The cooling path may accommodate any of a fluid and solid to liquid phase change materials. The fluid comes into direct contact with the power die layers, heat sink components, and electrically conductive layers.

公开(公告)号：US20180275418A1

公开(公告)日：2018-09-27

申请号：US15464382

申请日：2017-03-21

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Leonid A. Beresnev ,  Anthony R. Valenzuela ,  Chatt C. Williamson

IPC: G02B27/30 ,  G02B27/09 ,  G02B6/26 ,  F41H13/00

CPC classification number: G02B27/30 ,  F41H13/0062 ,  G02B6/262 ,  G02B6/32 ,  G02B27/0927 ,  G02B27/0961 ,  G02B27/0977

Abstract: An optics system includes at least one emitting fiber tip that transmits a divergent beam. The divergent beam includes a global maximum intensify of radiation centered with an output optical axis. The divergent beam includes central beams for collimating and periphery beams for disposing. The periphery beams include parasitic radiation of the divergent beam. The optics system includes at least one collimating lens having an output size, output shape, and output optical axis centered thereto and configured to redirect the central beams to a target and redirect the periphery beams into free-space; and at least one redirecting element positioned in between the at least one emitting fiber tip and the at least one collimating lens. The redirecting element includes a first area having an interior size and interior shape to transmit the central beams, and at least one second area outside of the first area to transmit the periphery beams.

公开(公告)号：US10069669B2

公开(公告)日：2018-09-04

申请号：US15422219

申请日：2017-02-01

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Ali M Darwish ,  Hingloi Alfred Hung

IPC: H04L27/36 ,  H04L27/34 ,  H04B1/04

Abstract: A radio transmitter having a RF signal source. A splitter receives an input signal from the signal source and divides that input signal into two output signals. Alternatively, two signal generators provide the two output signals. These output signals are fed into two phase shifters. A phase control signal is applied to each phase shifter so that the vector sum of the output signals represents the desired amplitude and phase of the desired transmitted signal. The outputs of both phase shifters are both frequency multiplied and amplified before recombining to form the transmitter output signal. Moreover, the outputs can be transmitted separately and combined at the receiver. Alternatively, in the case of two signal sources, the signal paths may be at different transmitter locations.

公开(公告)号：US20180231602A1

公开(公告)日：2018-08-16

申请号：US15431941

申请日：2017-02-14

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： William A. Beck

IPC: G01R31/26 ,  G01R33/12

CPC classification number: G01R31/2648 ,  G01R33/07 ,  G01R33/1253

Abstract: A method for determining a two-dimensional spectrum of a specified carrier having a specified mobility and density in a material of an electronic device, the method including performing a magnetic field-dependent Hall measurement on the material of the electronic device; determining, using the magnetic field-dependent Hall measurement, a probability density function of a conductance of the material of the electronic device, wherein the probability density function describes a spectrum of a plurality of m-carriers, wherein the plurality of m-carriers includes the specified carrier having the specified mobility and density; and determining an electrical transport of a plurality of electrons and holes inside the material of the electronic device by observing a variation of the probability density function with any of the specified mobility and density of the specified carrier.

公开(公告)号：US10043565B2

公开(公告)日：2018-08-07

申请号：US15131881

申请日：2016-04-18

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Glen Richard Fox ,  Jeffrey S. Pulskamp ,  Ronald G. Polcawich

IPC: H01L21/02 ,  G11C11/22 ,  G11C11/50 ,  G11C23/00 ,  H01L41/09 ,  H01H57/00

Abstract: A ferroelectric mechanical memory structure comprising a substrate, a MEMS switch element movable between a first position and at least one second position, the MEMS switch element comprising first and second electrodes, a layer of ferroelectric material positioned between the first and second electrodes so that upon application of voltage between the first and second electrodes the MEMS switch element moves between the first position and the second position, and a switch contact which contacts the first electrode only when the MEMS switch element is in the first position, wherein the ferroelectric material is selected so that the remanent strain within the layer of ferroelectric material is controlled by the history of the voltage potential applied to the ferroelectric material by the first and second electrodes, and wherein the remanent strain is sufficient to retain the MEMS switch element in the first or second position upon removal of the voltage.