Donald C Walker

US Patent:

6924772, Aug 2, 2005

Filed:

Oct 30, 2003

Appl. No.:

10/695750

Inventors:

Donald J. Walker - Catonsville MD, US
Daniel E. Stamm - Baltimore MD, US
William B. Yablon - Elkridge MD, US
Paul M. Dishop - Linthicum Heights MD, US

Assignee:

Northrop Grumman Corporation - Los Angeles CA

International Classification:

H01Q021/00

US Classification:

343725, 343720, 343754, 343781 CA

Abstract:

A tri-mode co-boresighted seeker including a primary collecting mirror assembly having a parabolic surface and a forwardly located dielectric secondary mirror assembly including a dielectric mirror coating which reflects infrared (IR) energy to an IR detector assembly located on a central longitudinal axis on one side of the secondary mirror while providing substantially unobstructed propagation of millimeter wave RF energy and laser energy in a joint or common signal path therethrough to means located on the other side of the secondary mirror for extracting and diverting laser energy away from the common RF-optical signal path to a laser sensor assembly while causing little or no disturbance to the RF signal as it propagates to a co-located bifurcated waveguide assembly which couples the RF energy to an RF sensor means located behind the primary mirror.