Retroreflective structures having a helical geometry

Details Retroreflective structures having a helical geometry Retroreflective structures having a helical geometry

2008-08-11

2011-10-11

Font, Frank (Department: 2872)

Optical: systems and elements

Signal reflector

3-corner retroreflective

C359S530000

Reexamination Certificate

active

08033671

ABSTRACT:
Retroreflective structures and methods of forming the same comprise a body of material extending along a helical path about a longitudinal axis and a plurality of retroreflective optical elements positioned along the helical path of the body of material, and constructed and arranged to retroreflect electromagnetic energy directed from a range of angular orientations about the longitudinal axis.

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patent: 7502534 (2009-03-01), Lee et al.
patent: 2004/0190102 (2004-09-01), Mullen et al.

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