US 5,580,156 A · Marker apparatus

Abstract

A marker apparatus including a retroreflector constituted by three reflective surfaces arranged on three surfaces of a trigonal pyramid and a light source disposed on an optical axis of the retroreflector. A lens is provided in front of the retroreflector and a condensing lens is formed on the lens for condensing light emitting from the light source. A plurality of retroreflectors are provided continuously on the same plane in such a manner that directions of the three reflective surfaces, which constitute each of the retroreflector, are different from one another, and a front view of the retroreflector is regular hexagonal. A wall surface is formed between the three reflective surfaces constituting each retroreflector so that the wall surface directed in parallel with an optical axis.

Claims31

Dependent claims

A marker apparatus comprising:

at least one retroreflector constituted by a trigonal pyramid having three reflective surfaces;
a light source disposed on an optical axis of said retroreflector;
a cylindrical casing accommodating therein a battery for supplying electric power to said light source;
a marker body accommodating therein said retroreflector, said marker body detachably engaging with said casing;
and
a lens mounted on a front opening of said marker body;
and wherein
said marker body comprises an air hole formed in a back surface thereof for communicating an inside of said marker body with an outside thereof, a window formed in the back surface thereof for leading light therein, and a transparent cover mounted on said light leading window through an O-ring.

5 more elements

Dependencies are inferred from the claim text.

Marker apparatus

Life of this patent

Marker apparatus

Life of this patent

Abstract

Claims31