TRAFFIC SIGNAL LAMP AND MANUFACTURE OF LENS THEREOF

TRAFFIC SIGNAL LAMP AND MANUFACTURE OF LENS THEREOF

PROBLEM TO BE SOLVED: To improve the recognizablility of lighting state and non-lighting state from a direction having a large reduction in luminous intensity. SOLUTION: The obliquely down parts 27 and 35 of the cylindrical part 15B of a Fresnel lens 15 and the cylindrical part 16B of a front lens 1...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: FUUBU KONAN, IKEMURA YUJI, OKAZAKI EIJI
Format: Patent
Sprache:eng
Schlagworte:
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
SIGNALLING
TRAFFIC CONTROL SYSTEMS
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To improve the recognizablility of lighting state and non-lighting state from a direction having a large reduction in luminous intensity. SOLUTION: The obliquely down parts 27 and 35 of the cylindrical part 15B of a Fresnel lens 15 and the cylindrical part 16B of a front lens 16 are formed into mirror planes to set the light transmittance higher than that of the other part.