公开(公告)号：WO1989012774A1

公开(公告)日：1989-12-28

申请号：PCT/US1989002782

申请日：1989-06-23

Applicant: ALLIED-SIGNAL INC.

Inventor： ALLIED-SIGNAL INC. ,  HOU, Janpu ,  CHAI, Bruce, Hua-Tzu ,  BADDING, David, Daniel ,  WEST, Gary, Allen ,  MARCUS, Stephen, L.

IPC: F23M11/04

CPC classification number: F23N5/082 ,  F23M11/045 ,  G01J1/58

Abstract: An optical flame detector is provided, suitable for sensing by sensing module (1) flame-out in the afterburner of a gas turbine aircraft engine. A phosphor (9) senses the UV radiation emanating from the flame, and in response thereto emits radiation in the visible region. The visible radiation is sensed by detector module (2); its absence is used to trigger fuel flow shut-off to the afterburner.

公开(公告)号：WO1992021996A1

公开(公告)日：1992-12-10

申请号：PCT/US1992004185

申请日：1992-05-18

Applicant: ALLIED-SIGNAL INC.

Inventor： ALLIED-SIGNAL INC. ,  GUALTIERI, Devlin, M. ,  HOU, Janpu ,  MORRIS, Robert, C. ,  VAN DE VAART, Herman

IPC: G02B06/12

CPC classification number: G02B6/131 ,  G02B6/02 ,  G02B6/122

Abstract: Optical waveguides suitable for use in high temperature environments are constructed of a waveguiding body composed of a first crystalline aluminum garnet, which is clad with an epitaxially deposited layer of a second crystalline aluminum garnet. The second crystalline aluminum garnet has a lower refractive index than the first crystalline aluminum garnet. When there is sufficient lattice mismatch between garnet substrate and cladding layer, strain is induced which causes stress with resultant birefringence in the waveguiding layer. Such birefringent waveguides maintain polarization of light propagated therein.

Abstract translation: 适用于高温环境的光波导由包含第二结晶铝石榴石外延层的第一晶体铝石榴石构成的波导体构成。 第二种结晶铝石榴石的折射率低于第一种结晶铝石榴石。 当石榴石基体和包层之间存在足够的晶格失配时，引起应变，导致在波导层中产生双折射的应力。 这种双折射波导保持在其中传播的光的偏振。

公开(公告)号：WO1994002816A1

公开(公告)日：1994-02-03

申请号：PCT/US1993001129

申请日：1993-02-09

Applicant: ALLIED-SIGNAL INC.

Inventor： ALLIED-SIGNAL INC. ,  GUALTIERI, Devlin ,  VANDEVAART, Herman ,  EMO, Stephen, M. ,  HOU, Janpu

IPC: G01L11/00

CPC classification number: G01L11/025

Abstract: A sensor for use in an optic system to detect current conditions in an environment. The sensor has a crystal member with a first waveguide extending from a top surface and a second waveguide extending from a bottom surface of a core member. Polarized light waves from a source are simultaneously communicated to the first and second waveguides. A first pressure is communicated to the top surface of the crystal member and an unknown pressure corresponding to the pressure of the environment is communicated to the bottom surface of the crystal member. The first pressure and the unknown pressure develop a pressure differential which act on the crystal member to deform the first and second waveguides. The deformation of the first and second waveguides modify the polarized light waves to create first and second output waves which are communicated to an optical interface where differences therebetween are extracted. The differences are analyzed by a computer to identify the current pressure and temperature of the environment.

Abstract translation: 用于光学系统以检测环境中的当前状况的传感器。 传感器具有晶体构件，其具有从顶表面延伸的第一波导和从芯构件的底表面延伸的第二波导。 来自源极的偏振光波同时传送到第一和第二波导。 第一压力传递到晶体构件的顶表面，并且与环境压力相对应的未知压力传递到晶体构件的底表面。 第一压力和未知压力产生作用在晶体构件上以使第一和第二波导变形的压力差。 第一和第二波导的变形修改了偏振光波，以产生第一和第二输出波，该第一和第二输出波被传送到其间提取差异的光学接口。 计算机分析差异以识别当前的环境压力和温度。