公开(公告)号：DE60137014D1

公开(公告)日：2009-01-29

申请号：DE60137014

申请日：2001-05-14

Applicant: LITTON SYSTEMS INC

Inventor： HALL JOHN R ,  LIBMAN DAVID F ,  MCLEAN THOMAS

IPC: G01C19/72 ,  G02B6/00

Abstract: A system and method for providing a rotation sensor for use in a fiber optic gyroscope including a centrally-located cylindrical hub having an improved slip interface positioned there around. The central hub has a substantially planar mounting flange extending from one of its ends, where the axis of rotation of the central hub is orthogonal to the plane of the mounting flange. A sensor coil comprising a plurality of layers of coaxial turns of optical fiber embedded in a potting material is formed around an outer surface of the interface. The interface allows the potted coil to expand or contract along the axial direction of the central hub due to thermal expansion while maintaining a constant thermal and mechanical connection between the interface and the potted coil. In this manner, the present invention maintains the integrity of the potted coil and its connection to the interface during thermal expansion of the potted coil, thus minimizing temperature-induced Shupe bias errors in the rotation sensor.

公开(公告)号：CA2637481A1

公开(公告)日：2009-01-12

申请号：CA2637481

申请日：2008-07-10

Applicant: LITTON SYSTEMS INC

Inventor： BONG BAN S ,  HAVELKA STEVEN E ,  SAXENA RAGINI ,  MCLEAN THOMAS ,  LOO THOMAS

IPC: H05K5/02 ,  H05B33/02 ,  H05K9/00

Abstract: The invention relates generally to a modular display panel for enclosing Commercial-Off-The-Shelf ("COTS") display technologies. More particularly, the invention relates to a modular display panel for housing COTS light emitting or transmitting display subassemblies such as Liquid Crystal Displays (LCD) for military and other severe environments. The modular display assembly can comprise a base plate, a first frame, a window, a secon d, a circuit located, and a plurality of light emitting diodes mounted on the circuit board. The COTS light emitting or transmitting display subassembly can be connected to the second frame.

公开(公告)号：DE4229462A1

公开(公告)日：1993-03-18

申请号：DE4229462

申请日：1992-09-03

Applicant: LITTON SYSTEMS INC

Inventor： MCLEAN THOMAS ,  MOORE GREGORY S

IPC: G01C19/72 ,  H01L33/00 ,  H01S3/04 ,  H01S5/00 ,  H01S5/022 ,  H01S5/024

Abstract: The invention temperature controlled package comprises a case having sidewalls that form a closed perimeter; a cover; and a base having an input surface and an output surface. The sidewalls are integrally coupled to the base input surface to define an interior region. A heatsink has a top surface and a bottom surface. The heatsink bottom surface is attached to the input surface of a thermoelectric cooler. The bottom surface of the thermoelectric cooler is coupled to the base input surface of the case. The thermoelectric cooler responds to a control signal to move heat from the thermoelectric cooler input surface to the thermoelectric cooler output surface. In a first alternative embodiment, a laser diode coupled to the heat sink responds to an electrical input signal to providing an optical laser output signal. The optical output of the laser diode is coupled via a optical fiber through a fiberoptic feedthrough in a sidewall. The interior region is filled with xenon gas. A cover is welded on the sidewalls to form a sealed interior region with xenon gas therein. The xenon gas limits the movement of heat from the interior surface of the sidewalls and the interior surface of the cover to the surfaces of the thermoelectric cooler.