The 7730000000000000000 lumen laser.

9 posts / 0 new
Last post
Last seen: 1 month 4 hours ago
Joined: 05/31/2014 - 15:32
Posts: 60
The 7730000000000000000 lumen laser.

The folks over at the Rutherford Appleton laboratory have created a laser to research gamma ray bursts. They claim it has the power of the entire sunlight on the earth focused down to a few mircrons. The insolation of the earth is 164 watts per square meter. The luminous efficacy of sunlight is 93 lumens per watt and surface of the earth is 507000000000000 square meters. Be sure to check my math. Some one should be able to calculate the candlepower from this. Of course in a few years you will able to buy one of these on Alibaba. Perhaps powered by an antimater battery.

264's picture
Last seen: 1 day 8 hours ago
Joined: 12/08/2011 - 14:52
Posts: 1446

Interesting post and link. Thank you.

niraya's picture
Last seen: 3 weeks 3 days ago
Joined: 09/07/2012 - 03:23
Posts: 125
Location: EU

Interesting, even though I am not sure why would I EVER buy such thing in Alibaba or anywhere else Hat

FPV's picture
Last seen: 2 weeks 1 day ago
Joined: 07/14/2017 - 12:36
Posts: 565
Location: Traveling on the job

cool link, thanks for sharing. very interesting application

Enderman's picture
Last seen: 12 hours 52 min ago
Joined: 11/03/2016 - 22:42
Posts: 3927
Location: Vancouver, Canada

Sunlight on the earth only hits half. So you don’t take the surface area of the earth as a sphere, you take it as a flat disk.
It’s also not possible to calculate candlepower without knowing the beam divergence or intensity either.

mustig's picture
Last seen: 4 hours 4 min ago
Joined: 11/22/2017 - 14:50
Posts: 58
Location: Sweden

I read the article. The beam was 200 TW! Crazy!

Regarding your math, you used the entire surface of the earth when sunlight only reaches the projected area. Also, I believe your insolation number must be a yearly average over the entire planet surface including nights. Changing these should anyhow only result in a difference of 1-2 orders of magnitude…

mustig's picture
Last seen: 4 hours 4 min ago
Joined: 11/22/2017 - 14:50
Posts: 58
Location: Sweden

And they focused it on a spot 27 µm in diameter, that’s 3.5 × 10^23 W/m2.

Last seen: 20 hours 21 min ago
Joined: 02/25/2017 - 15:33
Posts: 90
Location: Greece/Germany

Maybe a resistor mod? And bypass the springs for a bit more output? Big Smile

-Air cooled 4x XHP50.2:
-SkyRay King 4x XPL HI, TN40 clone:
-XHP70.2 Maglite 2D:
-SkyRay King 7x XML2, TIR, 8x 18650:

djozz's picture
Last seen: 26 min 36 sec ago
Joined: 09/07/2012 - 17:04
Posts: 15140
Location: Amsterdam

a tiny message from aliens, brought to you from within our lab! Big Smile