Optical: systems and elements – Signal reflector – 3-corner retroreflective
Patent
1993-01-21
1995-05-16
Ben, Loha
Optical: systems and elements
Signal reflector
3-corner retroreflective
340947, 340953, 359530, G02B 5122
Patent
active
054166365
ABSTRACT:
A runway marker has a pair of upwardly converging reflectant planar panels facing approximately in opposite directions. In its correct attitude on a support surface the panels slope at 2.degree.-6.degree. to the vertical if the marker is intended for assisting the landing of fixed wing aircraft and at 8.degree.-10.degree. to the vertical if the marker is intended for assisting the landing of helicopters. The reflectant panels are preferably retroreflectant.
REFERENCES:
patent: 4428320 (1984-01-01), Oplt et al.
patent: 4726706 (1988-02-01), Attar
patent: 4868567 (1989-09-01), Eichweber
Ben Loha
Phan James
LandOfFree
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