Repository of Dumb Ideas

LouieAtienza · 2019-03-21T02:44:43.000Z

So I thought it would be fun to start a thread about our wacky ideas. With no pretention, no snobbery, no rhyme nor reason. Just some whacky stuff you thought would work on flashlights but are just too “wonky.”

My first submission. An RLT would be great with an aspheric zoomie, though with the height of the RLT, it may not allow a full movement of the lens. Or, you want to use a lens with a short focal length. I present… The Fresnel RLT! About 1/3 to 1/4 the height of a comparable RLT! I have this notion that the lands between the spherical sections act to self-correct light rays that are not on center of the LED, as a ray from the farther side of center will hit the flats before being redirected to the spherical section, and rays closer than center would hit the spherical section, then the flats.

Lightbringer · 2019-03-21T03:16:22.000Z

Uhhh, “RLT”?

MtnDon · 2019-03-21T03:22:14.000Z

Lightbringer:

Uhhh, “RLT”?

Really Lame Thought , or dumb idea

zak.wilson · 2019-03-21T03:47:13.000Z

Recycled light technology, as in the Wavien collar.

LouieAtienza · 2019-03-21T03:52:38.000Z

Even have a lame parabolic profiled Fresnrl reflector for a reflector light with an ultra short head. I call this stuff Super High Intensity Technology or S. H. I. T. for short….

MtnDon · 2019-03-21T04:01:00.000Z

Henk4U2 · 2019-03-21T08:28:55.000Z

Ever tried surpressing the abundant lumen drift by using an Aspheric Ricocheting Subliminal Edge?
AFAIK these can easily be obtained in literally every size and color.

Agro · 2019-03-21T08:36:30.000Z

Similar yet different:

Fresnel-style collar? Flashlight Modding and DIY Parts

Can’t sleep this night. Thinking about stuff I came up with an idea. It may not be new. It may be fundamentally flawed. I should think it through while being less tired before posting. But I’ll write it now anyway…. If I understand it correctly, with reflective collars, size matters. The larger the collar, the more effective it is at pointing the light back towards the die. But, obviously, head’s internal diameter is a limitation. You can’t put a hemisphere larger than inside. But you can put…

Agro · 2019-03-21T08:44:57.000Z

Another way to reduce the collar height issue:
Make a single sphere collar but cut into 2 pieces. The bottom piece would be just a regular collar with a very wide opening. The top piece would close up a part of the opening, so together they work as a single collar.
However they top part would be moved during zooming, nearly halving effective collar height.

Rdubya18 · 2019-03-21T09:20:10.000Z

Wouldn’t the flats creat a lot of artifacts in the beam ?

Agro · 2019-03-21T09:31:43.000Z

Rdubya18:

Wouldn’t the flats creat a lot of artifacts in the beam ?

No, not at all.
Light will reflect off every edge, scattering there.
The opening edge - same as with a regular collar - will create a ring in the beam. Sharpness of the edge determines how big it will be.
Other reflections will just mean that light fails to hit the die and hits MCPCB instead. This will somewhat reduce collar efficiency - hopefully not much. The reflections won’t hit the lens and won’t show up in the beam though.
As to flats - they are off the light path and so they have no effect on the beam.

LouieAtienza · 2019-03-21T22:40:48.000Z

Agro:

Similar yet different:
Fresnel-style collar?

Haven’t seen that thread before, but it’s almost comforting to know I’m not the only one…

I would go further and extend the idea, with a parabolic-profiled Fresnel reflector, for an ultra-narrow recoil light…