Dual polarized filters to eliminate canopy reflections

Details Dual polarized filters to eliminate canopy reflections Dual polarized filters to eliminate canopy reflections

1995-11-15

1997-08-12

Dzierzynski, Paul M.

Optical: systems and elements

Extended spacing structure for optical elements

Extension of tubular element adjustable

359229, 359493, 359601, 296 971, 353 20, G02B 530, G02B 2700, G03B 2114, B60J 300

Patent

active

056571615

ABSTRACT:
A system is provided for eliminating light reflections within the cockpit of a vehicle having a canopy with a reflective interior surface. A first polarizing filter overlies a lighted display, enabling an occupant of the vehicle viewing the display to read information presented thereon. A second polarizing filter oriented 90.degree. out of phase with respect to the first filter is interposed in the cockpit in a line of sight between the occupant and reflections off the reflective interior surface of the canopy which initiate at the display thereby preventing the reflections from being seen by the occupant without affecting the ability of the occupant to see the lighted display. Preferably, the polarizing filters lie in substantially parallel spaced planes. Also, each polarizing filter may be mounted for movement between active and inactive positions. In another embodiment, first and second occupants may be positioned in a tandem relationship with the second polarizing filter being interposed in the cockpit in a line of sight between the second occupant and the reflections. In this latter instance, a transparent substrate may be interposed in the cockpit separating the first and second occupants with the second polarizing filter being mounted on the substrate.

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