Old 11-06-2016, 01:45 AM #33
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Default Re: Help with White Laser

I was just playing around with some old 3d movie glasses' lens and noticed that if you put 2 of them together, it becomes opaque. Rotating of the lens will make it more transparent. It will also allow more laser light to pass through. Is there a way to implement this in an rgb device to adjust the brightness of each laser? (no hardware modification)


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Old 11-06-2016, 03:27 AM #34
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Default Re: Help with White Laser

Quote:
Originally Posted by Dog View Post
I was just playing around with some old 3d movie glasses' lens and noticed that if you put 2 of them together, it becomes opaque. Rotating of the lens will make it more transparent. It will also allow more laser light to pass through. Is there a way to implement this in an rgb device to adjust the brightness of each laser? (no hardware modification)

Read up on polarizers.

It is certainly possible with a polarized laser beam. But, you need actual optical grade polarizers for good results. Easier and cheaper to just go with analogue drivers.
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Old 11-06-2016, 08:32 AM #35
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Default Re: Help with White Laser

White night beamshot that's the cats meow, I wanna see a photo of one
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Old 11-06-2016, 09:00 AM #36
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Default Re: Help with White Laser

Quote:
Originally Posted by Alaskan View Post
White night beamshot that's the cats meow, I wanna see a photo of one
You gotta be like a 'Hospital' mate..... full of patients....
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Old 11-06-2016, 01:33 PM #37
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Default Re: Help with White Laser

not enough, but I was having fun asking again more than anything I guess I'm bored, I've been stuck at this base for two weeks just waiting for a ride to another base and today, they tell me it will be another week
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Sincerely investigate any of these three short quotes as new concepts and you've taken your first step into a larger world:

"I regard consciousness as fundamental. I regard matter as derivative from consciousness..." - Max Planck. "Everything we call real is made of things that cannot be regarded as real" - Neils Bohr. "What we call physical things and events do not exist independently of subjective experience..." - Deepak Chopra.

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Old 11-06-2016, 10:08 PM #38
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Default Re: Help with White Laser

Would something like this work to adjust the brightness?
62mm variable adjustable Neutral Density ND filter fader ND2 ND400 for SLR lens | eBay
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Old 11-07-2016, 08:14 AM #39
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Default Re: Help with White Laser

What is your need? A fixed attenuator?
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Sincerely investigate any of these three short quotes as new concepts and you've taken your first step into a larger world:

"I regard consciousness as fundamental. I regard matter as derivative from consciousness..." - Max Planck. "Everything we call real is made of things that cannot be regarded as real" - Neils Bohr. "What we call physical things and events do not exist independently of subjective experience..." - Deepak Chopra.

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Old 11-07-2016, 08:33 AM #40
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Default Re: Help with White Laser

Quote:
Originally Posted by Alaskan View Post
not enough, but I was having fun asking again more than anything I guess I'm bored, I've been stuck at this base for two weeks just waiting for a ride to another base and today, they tell me it will be another week
I'll try to get the shots soon, it's just that I'm rostered on to work at nights this week.
As soon as I get a chance I'll do them for you buddy.

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but he who does not believe is condemned already, because he has not believed in the name of the only begotten Son of God.
And this is the condemnation, that the light has come into the world, and men loved darkness rather than light, because their deeds were evil.
For everyone practicing evil hates the light and does not come to the light, lest his deeds should be exposed.
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Old 11-07-2016, 08:42 AM #41
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Default Re: Help with White Laser

Just ribbing you earlier

Thanks, that would be great.
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Sincerely investigate any of these three short quotes as new concepts and you've taken your first step into a larger world:

"I regard consciousness as fundamental. I regard matter as derivative from consciousness..." - Max Planck. "Everything we call real is made of things that cannot be regarded as real" - Neils Bohr. "What we call physical things and events do not exist independently of subjective experience..." - Deepak Chopra.

Each of these three rabbit holes go deep, ending up in the same place.

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Old 11-07-2016, 09:56 AM #42
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Default Re: Help with White Laser

I'm talking about a device that will decrease the brightness without having to adjust the hardware. Can I put one of those cheap variable camera lenses in front of each of my lasers and be able to adjust the brightness of the laser through it?
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Old 11-07-2016, 10:20 AM #43
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Default Re: Help with White Laser

Depending upon how much power your laser is putting out, and the diameter of the beam, it very well may cook the coating off of the camera filters you put in front of it. Forgive me, but let me make sure I understand, you just want to vary the output level of the beam, set it to one value, and then not adjust it again, correct? If you want dynamic changes of power output level, controlled by something, I would just use TTL or analog control, look into that instead.

Edit: If you just want a fixed amount of output power you can change and then leave alone, you could just turn down the current from the driver going to the laser diode to reduce the level a lot instead of getting into stuff like this. I think I am out of anything more to suggest at this point. Good luck!
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To shorten my signature I have moved most of my laser related web links to this forum page, the second post in that thread shows most of my builds... Alaskan's Laser Links: http://laserpointerforums.com/f44/al...ml#post1449395


Sincerely investigate any of these three short quotes as new concepts and you've taken your first step into a larger world:

"I regard consciousness as fundamental. I regard matter as derivative from consciousness..." - Max Planck. "Everything we call real is made of things that cannot be regarded as real" - Neils Bohr. "What we call physical things and events do not exist independently of subjective experience..." - Deepak Chopra.

Each of these three rabbit holes go deep, ending up in the same place.

Useless troll fighting.

Last edited by Alaskan; 11-07-2016 at 10:22 AM.
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Old 11-09-2016, 08:35 AM #44
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Default Re: Help with White Laser

Quote:
Originally Posted by Alaskan View Post
Just ribbing you earlier

Thanks, that would be great.
Ok, guys, I have some good news and some bad news.
Firstly, the good news is that I've managed to complete a basic 'prototype' RGB slider box so I can properly test out the variable 5v inputs to get the various WL combinations
and thanks to diatchi's simple suggestion on how to hook these variable slider Pots up, it was so easy and works a treat !!!
Thank you kind Sir.

Now 'the bad news':
I'm still rostered on for night shift for the next few nights and it's been raining heavily here all afternoon and evening so no outside night time beam shots, sorry Mr Alaskan and GSS (Peter).

As soon as I get a chance I'll post some outside shots but I might start a new thread because I've inadvertently taken over the OP's (Dog) thread.
My apology 'Dog'.

So just a little longer guys....





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For God so loved the world that He gave His only begotten Son, that whoever believes in Him
should not perish but have everlasting life.
For God did not send His Son into the world to condemn the world,

but that the world through Him might be saved.
“He who believes in Him is not condemned;
but he who does not believe is condemned already, because he has not believed in the name of the only begotten Son of God.
And this is the condemnation, that the light has come into the world, and men loved darkness rather than light, because their deeds were evil.
For everyone practicing evil hates the light and does not come to the light, lest his deeds should be exposed.
But he who does the truth comes to the light, that his deeds may be clearly seen, that they have been done in God.”
(John 3:16-21)
─────────────────────────────────☀
If you confess with your mouth, “Jesus is Lord,” and believe in your heart that God raised Him from
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and it is with your mouth that you confess
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Old 11-09-2016, 02:58 PM #45
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Default Re: Help with White Laser

Cool, good work. I don't think the Dog minds the thread goes this way, should be helpful for him too.
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Sincerely investigate any of these three short quotes as new concepts and you've taken your first step into a larger world:

"I regard consciousness as fundamental. I regard matter as derivative from consciousness..." - Max Planck. "Everything we call real is made of things that cannot be regarded as real" - Neils Bohr. "What we call physical things and events do not exist independently of subjective experience..." - Deepak Chopra.

Each of these three rabbit holes go deep, ending up in the same place.

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Old 11-17-2016, 09:54 AM #46
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Default Re: Help with White Laser

Ok, the weather's been very unsettled lately and so this was a very quick setup outside so I could grab a test shot of the RGB White beam that this little beauty produces.
According to the specs, divergence is at around 0.8 mRad and 400mW combined power.

I'll be starting a new thread as I start to plan my build.

Hope you like it.

RB



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Old 11-17-2016, 01:03 PM #47
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Default Re: Help with White Laser

Wow! how does it look to the eye?
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Old 11-17-2016, 01:35 PM #48
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Default Re: Help with White Laser

Wow, thank you. Amazing, first time I have ever seen a white laser beam shot into the sky, I bet anyone else who sees it can say that, unless they have seen yours.
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