Title:
空中の水滴および氷晶の機内検出のための装置および方法
Document Type and Number:
Japanese Patent JP5709369
Kind Code:
B2
Abstract:
A device for optically detecting and distinguishing airborne liquid water droplets and ice crystals includes an illumination portion and a detection portion. The illumination portion (312) outputs a circularly polarized illuminating beam (318). The detection portion receives circularly polarized backscattered light from moisture in the cloud, in response to the illuminating beam. The circularly polarized backscattered light (322) is passed through a circular polarizer (333) to convert it into linearly polarized backscattered light, which is split into two components. Each of the two components is optionally subject to further linear polarization to filter out any leakage-type orthogonal polarization. The two components are then optically detected and the resulting detection signals are used to calculate one or more parameters reflective of the presence or absence of airborne ice crystals and/or water droplets.
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Inventors:
Mark Dee Ray
Michael P. Nesnidal
David M. Soha
Michael P. Nesnidal
David M. Soha
Application Number:
JP2009254045A
Publication Date:
April 30, 2015
Filing Date:
November 05, 2009
Export Citation:
Assignee:
ROSEMOUNT AEROSPACE INC.
International Classes:
G01S17/95; B64D15/20; G01W1/00; G01W1/14; G08B19/02
Domestic Patent References:
| JP2085744A | ||||
| JP8136455A | ||||
| JP9243747A | ||||
| JP7012569A | ||||
| JP5087823A | ||||
| JP2140489A | ||||
| JP7311312A |
Foreign References:
| US6091335 |
Attorney, Agent or Firm:
Atsuhiro Hamanaka
Kenichi Kakinuma
Noritaka Nishida
Patent Business Corporation Tani/Abe Patent Office
Kenichi Kakinuma
Noritaka Nishida
Patent Business Corporation Tani/Abe Patent Office