Angled elliptical axial lighting device

DETAILED DESCRIPTION Referring to FIGS.
1 thru 5, a first embodiment of the present invention will be explained hereinafter.
FIGS.
1 and 2 are perspective and front views of lighting device L1.
FIG.
3 is a sectional view of lighting device L1 taken across line 3-3' of FIG.
2 and FIG.
4 is a sectional view taken across line 4-4' of FIG.
2.
Lighting device L1 includes typical LED light source 5 similar to light source 5P previously described in prior art FIG.
11.
Looking at FIGS.
3 and 4 of the present application light source 5 includes LED element 1, mounted at the top of a first lead frame 2 and electrically connected to a second lead 3 by a connecting wire 4.
Lead frame 2 and lead 3 provide a means to connect a source of electrical power to light source 5.
LED element 1 is encapsulated in a light transmitting medium 11.
Looking at FIG.
3 on the top side TS of reference plane P1 light transmitting medium 11 is shaped to form reflective surface 12, hub 13, refractive surface 14 and lens 15.
Light transmitting medium 11 is usually a resin but can be any of a number of transparent substances including epoxy, acrylic plastic, etc.
Rear transition surface 16 connects reflective surface 12 to hub 13 and transition surface 17 connects refractive surface 14 to reflective surface 12.
Reflective surface 12 is vacuum metallized with reflective coating 12R to assure the efficient reflection of light.
However, even without reflective coating 12R, due to total internal reflection as described in the classical laws of physics much of the light impinging on reflective surface 12 would reflect efficiently.
Reflective surface 12 extends from intersection line 18 to intersection line 19.
Although not mandatory for all embodiments reflective surface 12, refractive surface 14 and lens 15 are usually symmetrical both about axis X1 and reference plane P1.
Looking at FIG.
3 on the bottom side BS of reference plane P1 we see reflective surface 12B, refractive surface 14B, and lens 15B all also formed from light transmitting medium 11