On Tue, 14 Mar 2017 20:27:09 -0500, AMuzi wrote:

Claims 'projector' lensing as opposed to 'reflector' lensing.
I don't know
http://www.herrmans.eu/start-english...?familyId=2209

More like a lens versus a reflector. There are benefits to both. I'll
skip the basics and just mumble something about LED's becoming larger.
If you look at the common white LED itself, you'll probably notice
that the yellow front surface area has become bigger with improvements
in light output. Most of the yellow is phosphor, which radiates
primarily in the forward direction. That's ideal for a lens, which
would "see" all of this light.

The same big LED with a reflector would have most of the light missing
the reflector. (Incidentally, this is why reflectors on LED
flashlights tend to be narrow and quite deep and why most LED
flashlights now use lenses). If you cover the reflector with some
dark cardboard, you'll find that the light is almost as bright as with
the reflector. However, since buyers expect a headlight to include a
reflector, and a reflector does reduce heat transfer to the light
housing, it is included.

The down side of a lens is that it loses up to 15% of the light going
through it, but does make the light go where it's needed and can be
focused.

The next generation of LED lights will no doubt include a photon
torpedo launcher.



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Jeff Liebermann
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