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From: JW on 19 Feb 2010 06:00
OK, I want one of these!

http://www.elektor.com/news/using-lasers-to-zap-mosquitoes.1260302.lynkx?utm_source=UK&utm_medium=email&utm_campaign=news
From: JW on 19 Feb 2010 06:06
On Fri, 19 Feb 2010 06:00:46 -0500 JW <none(a)dev.null> wrote in Message id:
<eorsn59ebegili423eh3cjbotr03b9h9t8(a)4ax.com>:

>OK, I want one of these!
>
>http://www.elektor.com/news/using-lasers-to-zap-mosquitoes.1260302.lynkx?utm_source=UK&utm_medium=email&utm_campaign=news

The video:
http://intellectualventureslab.com/
From: Sylvia Else on 19 Feb 2010 06:25
On 19/02/2010 10:06 PM, JW wrote:
> On Fri, 19 Feb 2010 06:00:46 -0500 JW<none(a)dev.null> wrote in Message id:
> <eorsn59ebegili423eh3cjbotr03b9h9t8(a)4ax.com>:
>
>> OK, I want one of these!
>>
>> http://www.elektor.com/news/using-lasers-to-zap-mosquitoes.1260302.lynkx?utm_source=UK&utm_medium=email&utm_campaign=news
>
> The video:
> http://intellectualventureslab.com/

I suppose it's plausible - but it bothers me that his name is 3ric
Johanson (3 not E), and that he's introduced inter alia as "Entropy
Generator".
From: osr on 19 Feb 2010 10:06
Speaking strictly as a former laser show tech...

1. It takes about 60 watts of Q Switched light to kill a bug, and it
doesn't really quickly kill them, it burns the wings off. Bugs fairly
regularly die within 20 feet of the laser at the rare laser shows that
still have that kind of power. But NO regulatory agency is going to
allow that kind of widget into the backyard.
Your looking at 3500$ for the galvos, And another 2500 for a decent
laser in bulk, and I do mean in bulk, because at Q1 they are about
10,000$ give or take.

2. Blueray is not going to do that, 2 combined blue-ray diodes (405
nm) running in their pulsed mode,
would have a average power of about half a watt.

3. A while ago, a government sponsored group was talking about using
lasers for female only selective kills.
I suspect that is where he got the idea...

4. I love listening to the galvo bearing noise in his audio.. A lot of
that is not wingbeat, its tracking loop...
I suspect getting enough data for identification would require
adding Doppler, and that is NOT easy.
Cue Phil Hobbs...

5. The adaptive focuser required for a kill would have to move at
about 2.5 Khz... Do the math, its not cheap.
they exist, but not very cost effective.

6. Mozzies breed far faster then that thing can kill them...

The hardware there is a CNI 100-200 mW 532 nm DPSS laser, That would
NOT be a kill unless you tied the bug down and focused the beam on it
with a lens. The scan head is a used galvo pair from a company called
Scanlab, And the Schlieren derived imaging technique is NOT easily
field deployed, there is a custom mask needed inside the camera lens .
What 3M gets for a 1 meter square sheet of that retroreflector would
fund a 24 pack of RAID in spray cans.

If he needs 100-200 mW for tracking, that works out to about a 1 in
2000 shot at retinal damage at 10-20 feet, and a almost 100% certain
damage to a human eye close in.

While someone on his team has shown considerable skill in closing
the tracking loop from camera to laser, this is not viable for laser
safety reasons. One shot of the kill laser would be a retinal burn in
a human.

But what a viable way of getting some investor to pay you to have fun
for 6 months or a year.

Schlieren for tracking: http://www.mne.psu.edu/psgdl/imageswebpage.html

http://www.mne.psu.edu/psgdl/imageswebpage.html

Steve ..



..
From: Joel Koltner on 19 Feb 2010 13:31
<osr(a)uakron.edu> wrote in message
news:0dd36066-8396-4268-84fb-629f86141dbf(a)f15g2000yqe.googlegroups.com...
> While someone on his team has shown considerable skill in closing
> the tracking loop from camera to laser, this is not viable for laser
> safety reasons. One shot of the kill laser would be a retinal burn in
> a human.

Yeah, but couldn't you just build a big self-contained box (say, the size of a
cargo container) that mechanically could only focus on things within that box
(and used fences or other mechanical barriers to keep people out)?

I agree with you that as it exists now, it's pretty cost prohibitive. The
cost would almost have to be taken as "cost per mosquito killed per unit time"
or similar anyway -- a mosquito-killing laser system is probably quite cheap
at, say, even $25k if it can sit there all night and kill 95% of the
mosquitoes entering a village (but what he has right now looks like it might
kill one mosquito every few seconds, which is closer to 0% :-) ).

---Joel

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