LENS FOR A VISUAL ALARM DETECTOR

A dome lens extending upwardly about a center axis A and outwardly in a radial direction R, having: a first portion forming a first annular ring about the center axis A that includes a first inner surface that is convex, and being oriented so that a first tangent to the first inner surface is at a f...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	KELLEY, RYAN, MOTT, KENNETH J, DANVERS, NARVAL
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHYSICS
Online-Zugang:	Volltext bestellen
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