Laser pointer discussion. Read/write reviews of laser pointers and laser pointer companies. Learn about all types of laser pointers and lasers





Welcome to Laser Pointer Forums! If you are looking for a laser pointer or want to compare different laser pointer companies, you may want to check out the LPF Laser Pointer Company Database. The link will open in a new window for your convenience.








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
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
Laser Technology Laser Pointer Parts Lasers by Wavelength
Top 10 Laser Pointer Companies Laser Pointer Company Database Visible Beam Laser Pointers


One laser store meets all your needs

























Go Back   Laser Pointer Forums - Discuss Laser Pointers > Lasers > 445nm Lasers



LPF List of Laser Pointer Companies (link opens new window)



Reply
 
LinkBack Thread Tools Display Modes
Old 10-19-2012, 11:34 AM #1
Class 1 Laser
 
Join Date: Jan 2009
Location: Belgium
Posts: 89
Rep Power: 14
svdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of light
svdr svdr is offline
Class 1 Laser
 
Join Date: Jan 2009
Location: Belgium
Posts: 89
Rep Power: 14
svdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of light
Default 450nm for astronomy pointing?

Hi, I am an astronomer, and I like usig lasers for pointing my telescope at night.

So, I used a 5mW green (beam visibility is OK for me) BUT the greenies allways die from cold temps because they are DPSS. I can use greenies only in summer.

After that, I went with a 300mW red. Left that one also, even at 300mW, beam visibility isn't great. However, they don't suffer the cold.

Now I am thinking about a 80mW 450nm. Beam visibilty should equal a 5mW greenie, or be even slightly brighter. As they are also SS, temperature should not be an issue.

Any experience or thoughts on this?

I think about the OSRAM PL450B 450nm 80mW diode. What driver should I need? (would maybe run it at 100mW) I also Prefer using AA or AAA batteries.


svdr is offline   Reply With Quote







LPF List of Laser Pointer Companies (link opens new window)







Old 10-19-2012, 11:51 AM #2
Coby's Avatar
Class 1M Laser
 
Join Date: Jul 2012
Location: Belgium
Posts: 216
Rep Power: 13
Coby is a splendid one to beholdCoby is a splendid one to beholdCoby is a splendid one to beholdCoby is a splendid one to beholdCoby is a splendid one to beholdCoby is a splendid one to beholdCoby is a splendid one to behold
Coby Coby is offline
Class 1M Laser
Coby's Avatar
 
Join Date: Jul 2012
Location: Belgium
Posts: 216
Rep Power: 13
Coby is a splendid one to beholdCoby is a splendid one to beholdCoby is a splendid one to beholdCoby is a splendid one to beholdCoby is a splendid one to beholdCoby is a splendid one to beholdCoby is a splendid one to behold
Default Re: 450nm for astronomy pointing?

I have used my 2000mW 445nm before to to star pointing, it'll work, you just have to focus it to infinite very good so the beam stays as small as possible.
__________________
405nm - 41mW laser pen
405nm - ???mW HL405-500
445nm - 2000mW by Blord
532nm - 456mW (50% overspec ) HL532-300 by Skylasers
532nm - 216mW LP532-150 by Skylasers
Coby is offline   Reply With Quote
Old 10-19-2012, 12:29 PM #3
Junior Member
 
Join Date: Sep 2012
Posts: 15
Rep Power: 0
nugget is on a distinguished road
nugget nugget is offline
Junior Member
 
Join Date: Sep 2012
Posts: 15
Rep Power: 0
nugget is on a distinguished road
Default Re: 450nm for astronomy pointing?

Hello, sorry just wanted to know what is focusing to infinity?
nugget is offline   Reply With Quote
Old 10-19-2012, 12:36 PM #4
Coby's Avatar
Class 1M Laser
 
Join Date: Jul 2012
Location: Belgium
Posts: 216
Rep Power: 13
Coby is a splendid one to beholdCoby is a splendid one to beholdCoby is a splendid one to beholdCoby is a splendid one to beholdCoby is a splendid one to beholdCoby is a splendid one to beholdCoby is a splendid one to behold
Coby Coby is offline
Class 1M Laser
Coby's Avatar
 
Join Date: Jul 2012
Location: Belgium
Posts: 216
Rep Power: 13
Coby is a splendid one to beholdCoby is a splendid one to beholdCoby is a splendid one to beholdCoby is a splendid one to beholdCoby is a splendid one to beholdCoby is a splendid one to beholdCoby is a splendid one to behold
Default Re: 450nm for astronomy pointing?

Focus to infinite means you point your laser to a far away object (a wall 100m further for example) and then you start focussing the beam (using the focus-wheel thingy at the front of the laser) until the dot you see on the wall is the smallest possible.

You'll notice that at first the dot will be very large but by focussing it gets smaller. By doing this on a far away object you "focus to infinite" providing the tightest beam you can get.
__________________
405nm - 41mW laser pen
405nm - ???mW HL405-500
445nm - 2000mW by Blord
532nm - 456mW (50% overspec ) HL532-300 by Skylasers
532nm - 216mW LP532-150 by Skylasers
Coby is offline   Reply With Quote
Old 10-19-2012, 10:18 PM #5
Jubathoph's Avatar
Class 1M Laser
 
Join Date: Jun 2011
Location: Los Angeles
Posts: 115
Rep Power: 21
Jubathoph has much to be proud ofJubathoph has much to be proud ofJubathoph has much to be proud ofJubathoph has much to be proud ofJubathoph has much to be proud ofJubathoph has much to be proud ofJubathoph has much to be proud ofJubathoph has much to be proud ofJubathoph has much to be proud ofJubathoph has much to be proud of
Jubathoph Jubathoph is offline
Class 1M Laser
Jubathoph's Avatar
 
Join Date: Jun 2011
Location: Los Angeles
Posts: 115
Rep Power: 21
Jubathoph has much to be proud ofJubathoph has much to be proud ofJubathoph has much to be proud ofJubathoph has much to be proud ofJubathoph has much to be proud ofJubathoph has much to be proud ofJubathoph has much to be proud ofJubathoph has much to be proud ofJubathoph has much to be proud ofJubathoph has much to be proud of
Default Re: 450nm for astronomy pointing?

my 80 me pl450 is very visible at night
Jubathoph is offline   Reply With Quote
Old 10-20-2012, 08:24 AM #6
Class 1 Laser
 
Join Date: Jan 2009
Location: Belgium
Posts: 89
Rep Power: 14
svdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of light
svdr svdr is offline
Class 1 Laser
 
Join Date: Jan 2009
Location: Belgium
Posts: 89
Rep Power: 14
svdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of light
Default Re: 450nm for astronomy pointing?

Quote:
Originally Posted by Jubathoph View Post
my 80 me pl450 is very visible at night
That sounds like very good news to me! Jubathoph, can you compare it to the beam of a 5mW green?

Coby, I see that you're also from B, and Blord also. Any chance that we can discuss further on this in our native language? (assuming you are Flemish)(aucun problème si tu es Francophone)

That 2000mW must be waaaayy bright in the sky. I have an old homeboosted 30mW 532nm and even that one is far too bright for pointing stars and deepsky objects.
svdr is offline   Reply With Quote
Old 10-20-2012, 09:30 AM #7
Class 2 Laser
 
Join Date: Mar 2011
Posts: 472
Rep Power: 147
TheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond repute
TheReddish TheReddish is offline
Class 2 Laser
 
Join Date: Mar 2011
Posts: 472
Rep Power: 147
TheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond repute
Default Re: 450nm for astronomy pointing?

Hmm assuming, your eyes and my eyes are close. A conservatively driven PL450b would be around 150mw. At 150mw indoors the 5mw green is 2.55% less bright than the 150mw 450nm. Outside at night, I do not have the hard data but the 450nm at 150mw "should be around" 3.25x brighter than the 5mw 532 due to our eyes adapting to darkness.

Last edited by TheReddish; 10-20-2012 at 09:32 AM.
TheReddish is offline   Reply With Quote
Old 10-20-2012, 09:46 AM #8
Blord's Avatar
Class 4 Laser
 
Join Date: Dec 2007
Location: Belgium
Posts: 5,368
Rep Power: 770
Blord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond repute
Blord Blord is offline
Class 4 Laser
Blord's Avatar
 
Join Date: Dec 2007
Location: Belgium
Posts: 5,368
Rep Power: 770
Blord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond repute
Default Re: 450nm for astronomy pointing?

Do you really need a blue pointer for astronomy ? Green laser are much more visible than blue at lower power. Get cheap ND1 filter. Cut a piece out and stick it in front of your 30mW laser. It will make your laser 3mW green.
__________________
405nm 400mW S06J C6
445nm 3W Big Boy, 2.8W Dominator, 2.4W Steel Laser
450nm 240mW PL450 C6
473nm 100mW PGL-III-C-473
520nm 55mW Skylaser PL520
532nm 821mW Skylaser PL532, 133mW Jetlasers Ti-B
589nm 100mW PGL-III-C-589
635nm 70mW Sanyo SenTorch
638nm 175mW Ehgemus, 1W Rook
660nm 1216mW Skylaser PL660, 263mW LPC826 C6
685nm 33mW Fujitsu FLD6A2TK C6
780nm 150mW Dilda
808nm 640mW C6

I have copper 501B and Dominator lasers for sale !
Blord is offline   Reply With Quote
Old 10-20-2012, 10:56 AM #9
Class 1 Laser
 
Join Date: Jan 2009
Location: Belgium
Posts: 89
Rep Power: 14
svdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of light
svdr svdr is offline
Class 1 Laser
 
Join Date: Jan 2009
Location: Belgium
Posts: 89
Rep Power: 14
svdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of light
Default Re: 450nm for astronomy pointing?

Quote:
Originally Posted by Blord View Post
Do you really need a blue pointer for astronomy ? Green laser are much more visible than blue at lower power. Get cheap ND1 filter.
I know. I am currently using a 5mW green. But as I wrote above, green DPSS lasers tend to 'die' when exposed at near freezing temperatures, because the optical train in the module shrinks out of collimation. Every year, it's the same pain when winter arrives and nighttemperatures drop. You see, we're talking about a fixed mounted laser on a large telescope that is outside for several hours. The laser itself is in *exact* collimation with the field of the telescope, so I cannot quickly take it off and put it in my pocket for warming up. The point is to put laser on, move telescope so that the beam reaches the desired point in the sky, shut laser off and look at the desired sky object.

A 'regular' solid state laser doesn't suffer this cold sensitivity. My 300mW red is great at below freezing, but I don't like the beam visibility. It's just no bright enough. I feel also objected shining a 300mW device in the sky (even though nobody sees it).

Since the arrival of the PL450B, my problem -and that of many amateur astronomers in cold climates with me- may come to an end.

@ TheReddish : I would run it at 80mW instead of 150. An 80mW 450nm beam should about equal the beam brightness of a 5mW 532 (I think...).
svdr is offline   Reply With Quote
Old 10-20-2012, 11:01 AM #10
Blord's Avatar
Class 4 Laser
 
Join Date: Dec 2007
Location: Belgium
Posts: 5,368
Rep Power: 770
Blord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond repute
Blord Blord is offline
Class 4 Laser
Blord's Avatar
 
Join Date: Dec 2007
Location: Belgium
Posts: 5,368
Rep Power: 770
Blord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond repute
Default Re: 450nm for astronomy pointing?

I have soon a 60mW 450nm blue laser for sale. The build is ready but I didn't made the ad yet. The diode is the Osram single mode 450nm LD so the beam is nice and tight.

You could also consider the 110mW 638nm Mitsubishi single mode diode. It has almost the same visibility as the 300mW 660nm red but at much lower power.
__________________
405nm 400mW S06J C6
445nm 3W Big Boy, 2.8W Dominator, 2.4W Steel Laser
450nm 240mW PL450 C6
473nm 100mW PGL-III-C-473
520nm 55mW Skylaser PL520
532nm 821mW Skylaser PL532, 133mW Jetlasers Ti-B
589nm 100mW PGL-III-C-589
635nm 70mW Sanyo SenTorch
638nm 175mW Ehgemus, 1W Rook
660nm 1216mW Skylaser PL660, 263mW LPC826 C6
685nm 33mW Fujitsu FLD6A2TK C6
780nm 150mW Dilda
808nm 640mW C6

I have copper 501B and Dominator lasers for sale !

Last edited by Blord; 10-20-2012 at 11:05 AM.
Blord is offline   Reply With Quote
Old 10-20-2012, 11:30 AM #11
Class 1 Laser
 
Join Date: Jan 2009
Location: Belgium
Posts: 89
Rep Power: 14
svdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of light
svdr svdr is offline
Class 1 Laser
 
Join Date: Jan 2009
Location: Belgium
Posts: 89
Rep Power: 14
svdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of light
Default Re: 450nm for astronomy pointing?

Very tempting. What's the price? Are these things stil pot regulated so that I can tweak it at my personal need? You know, make it a little bit dimmer or brighter?
svdr is offline   Reply With Quote
Old 10-20-2012, 11:44 AM #12
Class 1 Laser
 
Join Date: Jan 2009
Location: Belgium
Posts: 89
Rep Power: 14
svdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of light
svdr svdr is offline
Class 1 Laser
 
Join Date: Jan 2009
Location: Belgium
Posts: 89
Rep Power: 14
svdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of lightsvdr is a glorious beacon of light
Default Re: 450nm for astronomy pointing?

PM sent
svdr is offline   Reply With Quote
Old 10-20-2012, 03:50 PM #13
Moistenator's Avatar
Class 2M Laser
 
Join Date: Jun 2012
Location: Sydney, Australia
Posts: 789
Rep Power: 50
Moistenator has a reputation beyond reputeMoistenator has a reputation beyond reputeMoistenator has a reputation beyond reputeMoistenator has a reputation beyond reputeMoistenator has a reputation beyond reputeMoistenator has a reputation beyond reputeMoistenator has a reputation beyond reputeMoistenator has a reputation beyond reputeMoistenator has a reputation beyond reputeMoistenator has a reputation beyond reputeMoistenator has a reputation beyond repute
Moistenator Moistenator is offline
Class 2M Laser
Moistenator's Avatar
 
Join Date: Jun 2012
Location: Sydney, Australia
Posts: 789
Rep Power: 50
Moistenator has a reputation beyond reputeMoistenator has a reputation beyond reputeMoistenator has a reputation beyond reputeMoistenator has a reputation beyond reputeMoistenator has a reputation beyond reputeMoistenator has a reputation beyond reputeMoistenator has a reputation beyond reputeMoistenator has a reputation beyond reputeMoistenator has a reputation beyond reputeMoistenator has a reputation beyond reputeMoistenator has a reputation beyond repute
Default Re: 450nm for astronomy pointing?

Quote:
Originally Posted by svdr View Post
Very tempting. What's the price? Are these things stil pot regulated so that I can tweak it at my personal need? You know, make it a little bit dimmer or brighter?
Don't turn it up too much!
Moistenator is offline   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








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
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 03:16 AM.


Powered by: vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC