HID with Aspherical

[vincevoxbox]

Hello

I,ve been looking at Aspherical lens etc etc..has anyone ever tried to mod a HID unit with an Aspheric lens mod ?
surely that would be the most powerfull thrower of all ?
Im new to this etc etc..but as they say "out of the mouths of babies".

its a thought but what would the maxabeam be like with a huge aspherical lens.

what would one of these handheld little 10w mini hid be like if you could get a aspheric to fit them ?

I,m looking for power/throw/tight spread and plenty of hours use in one package.. the HID are amazing but seem very floody also..would the aspheric lens cure this ?

kind regards

vince.

 

[DM51]

I'll move this to the HID section.

 

[IMSabbel]

As an isotropic emitter, it will be quite hard to get good use out of an aspherical, i think.

A reflector can cover a way larger solid angle, especially is you consider the minimal Lens-Bulb distance required by the form of the HID bulb...

Add to this the larger typical reflectors used in HIDS, and the infeasability of using similar sized Aspheric lenses (just too expensive and heavy), and i do not think an aspheric HID would make a "most powerful thrower of all".

Just my oppinion, though. Maybe with a really large fresnell lens, like i have seen for solar ovens...

 

[Gunner12]

A reflector captures and projects more light then an aspherical lens with something like a HID light(360 degree emittance vs 180 degree).

The odd shape of the HID bulb might also be a factor why a lens isn't used.

With the high lumen per emitting area of a HID a reflector should be enough(and could be better then a lens) for a lot of throw.

 

[Mjolnir]

LED's send most of their light forwards, so a lens will transmit more light (in most cases) than a reflector. However, SSC P4's output more light to the sides, so they are not as good with aspherics as a more forward emitting cree LED.
Since HID's don't emit light in any particular direction without a reflector, an aspheric would waste a good deal of light.
(basically what Gunner12 just said)

 

[monkeyboy]

An aspherical lens works well with an LED since the light is emitted from a single plane. I don't think it would be so effective with HID.

 

[LukeA]

You could make a monster thrower with an aspheric lens, an HID bulb, and an ellipsoidal or spherical reflector. An old projector bulb assembly would be a good place to start (has an ellipsoidal reflector).

 

[vincevoxbox]

very interesting...

im off to the local scrapyard.


vince

 

[Patriot]

Small bulbs like the WA 10/14W look fantastic through a 52mm aspheric. The shape of the hot spot looks like a small, 4 pointed star, with tapering arms. It reminds me of like the ones artists use when they portray what the wise men followed to Bethlehem. The only problem is that it's not very bright. The lens only focuses the light coming from the front of the bulb. Everything else that's being bounced from the reflector surface is wasted because it's out of collimation. I've tried many different ways on three different lights and the issue was always the same.

Although not as good as LED's, incandescent bulbs actually work better at projecting a decent hot spot which looks like a magnified image of the filament. I think this works somewhat because the filament is 90 degrees to the lens where as with HID the arc shape is on axis with the lens.