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US 6,616,299 B2Granted
Single optical element LED signal
AssigneeGELcore, LLC
InventorPatrick Martineau
Life of this patent
Estimating the term…
Abstract
An LED signal using a single optical element. The single optical element designed with a generally smooth outer surface and an inner surface having Fresnel optical elements in an inner center region and total internal reflection elements in an outer periphery region. The single optical element may have an integral sealing surface for sealable connection to the signal housing and no countersinking so that it is capable of manufacture by injection molding.
Claims27
An LED signal lamp comprising:
- a housing, having an open end;
- at least one light emitting diode;
- a single optical element with optical features on an inner face and a substantially smooth outer face, the inner face having a center zone and a periphery zone and the optical elements in the center zone comprise a plurality of Fresnel elements and the optical elements in the periphery zone comprise a plurality of total internal reflection elements, wherein at least one of the total internal reflection elements has a shaped face;
- the single optical element having an area;
- the housing enclosing the at least one light emitting diode(s);
- and
- the single optical element covering the open end of the housing.
4 more elements
An optical element for use in a LED signal, comprising:
- a light transmissive element having a front and a back surface,
- the front surface being substantially smooth,
- the back surface populated with a plurality of optical elements in a center zone and a periphery zone,
- the optical elements in the center zone including a plurality of Fresnel elements;
- and
- the optical elements in the periphery zone including a plurality of total internal reflection elements, wherein at least one of the total internal reflection elements has a shaped face.
3 more elements
Dependencies are inferred from the claim text.