Communications: directive radio wave systems and devices (e.g. – Transmission through media other than air or free space
Reexamination Certificate
2007-02-13
2007-02-13
Nguyen, Hoang V. (Department: 2821)
Communications: directive radio wave systems and devices (e.g.,
Transmission through media other than air or free space
C343S756000
Reexamination Certificate
active
10513810
ABSTRACT:
An apparatus for redirecting radiation including a polarization dependent reflector and an optical component able to transform the polarisation of radiation as it passes through the component. Radiation having a first polarisation component impinging upon the reflector from a source is reflected towards a scene area. Radiation not having this polarisation component passes through the reflector. The radiation having the first polarisation is then transmitted towards a scene via the optical component. As the radiation passes via the optical component, reflects back from the scene and passes again via the optical component, the polarisation is changed to state where it can now pass through the polarisation dependent reflector. The apparatus allows a scene to be illuminated as if the illuminator were positioned at the viewpoint of an imaging system, and so aids uniform illumination of the scene. The apparatus is particularly suited to mm-wave systems, wherein the reflector may comprise a parallel wire grid polarizer, and the optical component may comprise a quarter-wave plate.
REFERENCES:
patent: 3754271 (1973-08-01), Epis
patent: 5596336 (1997-01-01), Liu
patent: 5748369 (1998-05-01), Yokota
patent: 6937182 (2005-08-01), Lovberg et al.
patent: 0 389 240 (1990-09-01), None
patent: WO 98/47020 (1998-10-01), None
patent: WO 99/61942 (1999-12-01), None
patent: WO 01/37029 (2001-05-01), None
patent: WO 02/084796 (2002-10-01), None
Anderton Rupert Nicholas
Appleby Roger
Coward Peter Russell
Lettington Alan Harold
Alemu Ephrem
McDonnell Boehnen & Hulbert & Berghoff LLP
Nguyen Hoang V.
Qinetiq Limited
LandOfFree
Apparatus for redirecting radiation does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for redirecting radiation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for redirecting radiation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3839465