Testing beams with smoke.Beamshots

[Barbarin]

Here is a sequence of pictures showing how the particles in suspension (in this case smoke-air, but could be water ) reduce the need of corona, as the main beam makes a "light tube effect" thanks to backscatter, which illuminates the surrounding area.

I need to take a similar sequence but with a black matt target to reduce as much as possible the reflexion of the main spot.

The first row is the new P7, which can be considered a thrower. Second row is the "Old painless" driven at 300 mA each LED (seven). Near cero spill.

The third row is a lens prototype, based on aspherics but with areas to get some extra spill.

And now a comparison showing the strange pattern of the "Multilens" combining the throw of aspherics with some spill, compared to a P7 with reflector.

 

[csshih]

woahoooo

that's pretty cool..

its fun to do that after a shower, when the bathrooms all fogged up

 

[Phattestdude]

Great stuff.
What is the difference in the four pics per row.

 

[Daylight]

WOW, only 300mA in the old painless....

Great stuff.
What is the difference in the four pics per row.

I think the exposure time, good for compare in columns intensity of the spot and spill between the three prototypes.

 

[spearsniper]

Looks like the difference between the four shots may be the amount of smoke pumped into the room. This is showing the effect that backscatter has on the amount of light dispersed.