LPF Laser Pointer Company Database






Welcome to Laser Pointer Forums! If you are looking for a laser you may want to check out the database of laser pointer companies. The link will open in a new window for your convenience.

Green Laser Pointers Blue Lasers Pointers Red Laser Pointers
Yellow Laser Pointers Purple Laser Pointers Orange Laser Pointers
Laser Pointers by Power - 1 Watt+ Laser Pointers by Power - 500mW+ Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes


























Go Back   Laser Pointer Forums - Discuss Laser Pointers > Newcomers > Welcome

LPF Database of Laser Pointer Companies




Reply
 
LinkBack Thread Tools Display Modes
Old 01-11-2007, 07:41 AM #1
Junior Member
 
Join Date: Jan 2007
Posts: 12
Rep Power: 0
KaneHau has a spectacular aura aboutKaneHau has a spectacular aura aboutKaneHau has a spectacular aura about
KaneHau KaneHau is offline
Junior Member
 
Join Date: Jan 2007
Posts: 12
Rep Power: 0
KaneHau has a spectacular aura aboutKaneHau has a spectacular aura aboutKaneHau has a spectacular aura about
Default Aloha!

Aloha All...

As a "years old" LASER and LED junkie... let me just say it is a welcome relief to find this forum.

I have had, and loved, lasers from the first day they came out (yes, I remember even the old RUBY lasers). YEARS ago... my first science fair project was a HeNe laser - it was 'novel' because it had brewster windows (oh wow - hello guys, we're talking 40 years ago). Currently I'm on vacation in New Zealand - with my green laser (wish it was a 'wicked laser'

Though I've worked for numerious companies in the past (NASA, Truevsion, etc)... currently I work for Subaru Telescope (www.naoj.org) *on the Big Island of Hawai'i - the largest single mirror telescope in the world. *We use ADAPTIVE OPTICS which incorporates artificial laser stars to clean the image....

Let me explain...

Our most recent system (which is just now being deployed) allows us to 'clean up the astronomy image'
by either focasing on a real star (which may, or may not be where we want it to be) or on an artificial star (when the 'guide star' is NOT where we want it to be) which is generated by a laser.

At the summit of Mauna Kea, on the Big Island of Hawai'i (at 14,796 ft) there are many observatories (12, going on 13)... a number of which use lasers and adaptive optic systems, to improve the image quality (we can achieve near hubble quality with this technique).

Our system, which is the very latest - uses a sodium ion laser (beautiful orange/yellow beam - sorry, don't know the manufacturer as this particular unit is temporary until our more powerful real unit is delivered).

When a 'guide star' is not where we want it to be for observing, we project an artificial star using the sodium ion laser. *The reflected beam is fed into an EXTREMLEY expensive photodiode detector system (each detector is over $1000, and there are 188 of them) and the results are viewed by 3 real-time computers.

In realtime we look at the distortion field of the beam, invert it (via some really fancy math, which I don't even understand (though we implement it) - it is not just a simple inversion) and we deform mirrors (a deformable mirror system - EXTREMELY expensive and very very very very cool - think about an 8 inch mirror which has 188 actuators which can deform the various sections of the mirror at the rate of up to 4000 hz per segment - e.g., 4000 times per second per segment - and you can't possible believe how reflective this mirror is - I'm used to laser mirrors and this mirror is as 'near perfect' as I've ever seen) to compensate for the atmospheric distortions that are revealed by the laser (or guide star in the case of a good guide star in the right spot for the desired observation).

This takes out the atmospheric distortion caused by the water vaper layers between the telescope and the target.

In the long run, this gives us one bitch'n image (very stable, very clean - the summit itself is one of the darkest places on the planet - 2500 miles from land in ALL DIRECTIONS - so the laser makes it even more so, and ALL streetlights on the Big Island have special filters on them which we can 'filter out' of the final images - so that the ambient light of the island itself doesn't affect our images).

Anyway... as I mentioned, many of the observatories (Keck, Caltech, etc) use adaptive optics similar (but not as advanced as the current one we are deploying) as ours.

One of the interesting facts is that the beams from the various observatories must be coordinated. *Not only against air traffic, but against each observatory (or the beam might interfere with other observations). There is an unbelivably complex system in place to make sure that beams to not cross beams (yes, this sounds like ghostbusters, DON'T CROSS THE BEAMS - but it is in fact true) and to check for air traffic. *The system involves computer coordination (which includes a human element which requires us to 'request permission to beam') as well as live human 'spotters' which use IR goggles (as each observatory uses different lasers) to spot for the lasers and also for aircraft which may stray into the area. We're talking about 14,976 feet, in Hawai'i, which believe it or not, we have MUCH SNOW (poor spotters... brrrrrrrr).

Anyway, just to share... and to say GREAT FORUM - thanks!

Aloha!


KaneHau is offline   Reply With Quote








Old 01-11-2007, 12:11 PM #2
SenKat
Guest
 
Posts: n/a
SenKat
Guest
 
Posts: n/a
Default Re: Aloha!

WOW ! *Welcome ! *And, as with everyone else - you DO have permission to beam ! * Quite impressive introduction, Muhalo ! (hope I did not butcher that too bad !)

Not sure exactly how I posted this in the wrong area when I was replying earlier...verrrrry odd. Anywho, glad to have you !
  Reply With Quote
Old 01-11-2007, 02:28 PM #3
Class 1M Laser
 
Join Date: Jun 2006
Posts: 192
Rep Power: 18
BeautySoulQueen is a splendid one to beholdBeautySoulQueen is a splendid one to beholdBeautySoulQueen is a splendid one to beholdBeautySoulQueen is a splendid one to beholdBeautySoulQueen is a splendid one to beholdBeautySoulQueen is a splendid one to beholdBeautySoulQueen is a splendid one to behold
Send a message via AIM to BeautySoulQueen
BeautySoulQueen BeautySoulQueen is offline
Class 1M Laser
 
Join Date: Jun 2006
Posts: 192
Rep Power: 18
BeautySoulQueen is a splendid one to beholdBeautySoulQueen is a splendid one to beholdBeautySoulQueen is a splendid one to beholdBeautySoulQueen is a splendid one to beholdBeautySoulQueen is a splendid one to beholdBeautySoulQueen is a splendid one to beholdBeautySoulQueen is a splendid one to behold
Send a message via AIM to BeautySoulQueen
Default Re: Aloha!

welcome!!!
as i said b4....here u can lay under the beam of a laser n catch a tan.....
just like in hawaii
BeautySoulQueen is offline   Reply With Quote
Old 01-11-2007, 09:18 PM #4
Class 1M Laser
 
Join Date: Nov 2006
Posts: 175
Rep Power: 21
NairB has much to be proud ofNairB has much to be proud ofNairB has much to be proud ofNairB has much to be proud ofNairB has much to be proud ofNairB has much to be proud ofNairB has much to be proud ofNairB has much to be proud ofNairB has much to be proud of
NairB NairB is offline
Class 1M Laser
 
Join Date: Nov 2006
Posts: 175
Rep Power: 21
NairB has much to be proud ofNairB has much to be proud ofNairB has much to be proud ofNairB has much to be proud ofNairB has much to be proud ofNairB has much to be proud ofNairB has much to be proud ofNairB has much to be proud ofNairB has much to be proud of
Default Re: Aloha!



Wow KaneHau, welcome to LPF. A very impressive job you have there.

You must post some pictures if you can of the observatory and if possible that laser system you are using

Do you operate/maintain the laser system then? If so can you tell us more what type it is etc

Look forward to some more of your post and...oh...if you need help regarding "normal" lasers, well thats why we are here LOL.

NairB is offline   Reply With Quote
Old 01-12-2007, 12:26 AM #5
Junior Member
 
Join Date: Jan 2007
Posts: 12
Rep Power: 0
KaneHau has a spectacular aura aboutKaneHau has a spectacular aura aboutKaneHau has a spectacular aura about
KaneHau KaneHau is offline
Junior Member
 
Join Date: Jan 2007
Posts: 12
Rep Power: 0
KaneHau has a spectacular aura aboutKaneHau has a spectacular aura aboutKaneHau has a spectacular aura about
Default Re: Aloha!

Aloha NairB:

You can find information on the observatory at their official website at:

http://www.naoj.org

I also run a website about Hawai'i and we have a page on the observatory with more info and photos at...

http://instanthawaii.com/cgi-bin/haw...ronomy.anatomy

As per photos of the laser system - I'm currently on vacation in New Zealand but wil check with Subaru when I return to find out the copyright status of the laser photos (there are some stunning timelapse photos of the laser projection testing at night).

As per your questions on my job - I am a computer scientist and am involved in a number of projects. I was on the adaptive optics team for a portion of time and did some of the software which handled the realtime data. Mostly my job involves what we term the Subaru Telemetry
KaneHau is offline   Reply With Quote
Old 01-12-2007, 09:42 AM #6
Class 1M Laser
 
Join Date: Nov 2006
Posts: 175
Rep Power: 21
NairB has much to be proud ofNairB has much to be proud ofNairB has much to be proud ofNairB has much to be proud ofNairB has much to be proud ofNairB has much to be proud ofNairB has much to be proud ofNairB has much to be proud ofNairB has much to be proud of
NairB NairB is offline
Class 1M Laser
 
Join Date: Nov 2006
Posts: 175
Rep Power: 21
NairB has much to be proud ofNairB has much to be proud ofNairB has much to be proud ofNairB has much to be proud ofNairB has much to be proud ofNairB has much to be proud ofNairB has much to be proud ofNairB has much to be proud ofNairB has much to be proud of
Default Re: Aloha!



KaneHau, very, very impressive indeed.

I understand about the sensitivity of the laser equipment regarding copyright......would love to see photo's of the laser unit itself etc and of course any snaps of that wonderful orange beam if possible.

Maybe you can post the photo with a big copyright sign with your company name over it to protect it.

I looked through your web pages and the photo's the telescope is taking are truly stunning, breathtaking in fact and you are very lucky to be working in this environment.

It's a pleasure to have you on the forum

Look foward to those copyrighted photos of the laser *cough, cough* lol ;D
NairB is offline   Reply With Quote
Old 01-26-2007, 04:52 AM #7
Class 1M Laser
 
Join Date: Nov 2006
Posts: 155
Rep Power: 10
Ragnarok is on a distinguished road
Send a message via AIM to Ragnarok Send a message via Yahoo to Ragnarok
Ragnarok Ragnarok is offline
Class 1M Laser
 
Join Date: Nov 2006
Posts: 155
Rep Power: 10
Ragnarok is on a distinguished road
Send a message via AIM to Ragnarok Send a message via Yahoo to Ragnarok
Default Re: Aloha!

Interesting work you do! I found an article online about the guide star/adaptive optics.

Is the laser an actual sodium ion laser or a solid-state laser that produces the equivalent sodium wavelength? The reason I'm asking is that I don't know of a sodium laser, but I see references to dye and solid-state lasers being used to make guide stars by exciting sodium atoms in the upper atmosphere.

Snipped from an online article :

"Diode-pumped sum frequency laser. Left: Two mode locked Nd:YAG lasers, one tuned to 1.064Ám and the other to 1.319Ám, are mixed in non-linear crystals to generate light at the sodium D2 line (0.589Ám)."
Ragnarok is offline   Reply With Quote
Old 01-29-2007, 02:42 AM #8
Class 1M Laser
 
Join Date: Jan 2007
Posts: 109
Rep Power: 16
troyboy is a splendid one to beholdtroyboy is a splendid one to beholdtroyboy is a splendid one to beholdtroyboy is a splendid one to beholdtroyboy is a splendid one to beholdtroyboy is a splendid one to behold
troyboy troyboy is offline
Class 1M Laser
 
Join Date: Jan 2007
Posts: 109
Rep Power: 16
troyboy is a splendid one to beholdtroyboy is a splendid one to beholdtroyboy is a splendid one to beholdtroyboy is a splendid one to beholdtroyboy is a splendid one to beholdtroyboy is a splendid one to behold
Default Re: Aloha!

HEY KANEHOU! just thought it would be fun to tell you the me and sniper and both from hawaii too! lol if we ever sell to each other the shipping shouldn't be too bad!

See ya round!

Aloooooooooooha!
troyboy is offline   Reply With Quote
Old 01-29-2007, 02:51 AM #9
Class 1M Laser
 
Join Date: Jan 2007
Posts: 162
Rep Power: 14
Sniper is a glorious beacon of lightSniper is a glorious beacon of lightSniper is a glorious beacon of lightSniper is a glorious beacon of lightSniper is a glorious beacon of light
Send a message via AIM to Sniper
Sniper Sniper is offline
Class 1M Laser
 
Join Date: Jan 2007
Posts: 162
Rep Power: 14
Sniper is a glorious beacon of lightSniper is a glorious beacon of lightSniper is a glorious beacon of lightSniper is a glorious beacon of lightSniper is a glorious beacon of light
Send a message via AIM to Sniper
Default Re: Aloha!

Yep we are both from Oahu how about you?
Sniper is offline   Reply With Quote
Old 01-29-2007, 06:50 PM #10
Class 1M Laser
 
Join Date: Jan 2007
Posts: 153
Rep Power: 14
Beefygt is just really niceBeefygt is just really niceBeefygt is just really niceBeefygt is just really niceBeefygt is just really nice
Send a message via AIM to Beefygt
Beefygt Beefygt is offline
Class 1M Laser
 
Join Date: Jan 2007
Posts: 153
Rep Power: 14
Beefygt is just really niceBeefygt is just really niceBeefygt is just really niceBeefygt is just really niceBeefygt is just really nice
Send a message via AIM to Beefygt
Default Re: Aloha!

That is fascinating that you use an ornge laser to make an artifucal star. It must be beautiful out there with no city lights bogging down the night sky.

I go to Canada once every year, and I can't wate to go up there with my lasers. I know I will be able to see for miles with it up there. ;D

Anyway, that is also an awesome job you have out there. I would love to have a job like that looking up at the night sky. :
Beefygt is offline   Reply With Quote
Old 01-30-2007, 07:03 AM #11
laser
Guest
 
Posts: n/a
laser
Guest
 
Posts: n/a
Default Re: Aloha!

here in hawaii (yes i live there too, so does troyboy and sniper) the humidity in the air makes the laser beam really visible. plus, theres no light pollution, or anything. when it rains, i immidialty grab my laser, because it looks so cool!!

anyways...that makes 4 people from hawaii...i think..
  Reply With Quote
Reply





Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On











Loading








Top 50 Laser Pointer Companies - Green Lasers Top 50 Laser Pointer Companies - Blue Lasers Top 50 Laser Pointer Companies - Red Lasers
Top 50 Laser Pointer Companies - Yellow Lasers Top 50 Laser Pointer Companies - Purple Lasers Top 50 Laser Pointer Companies - Orange Lasers
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes




Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 10:10 AM.


Powered by: vBulletin
Copyright ©2000 - 2016, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2016 Laser Pointer Forums, LLC