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Making a Laser using DLP Projectors

S

SpaceWizard

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After viewing styros video I would like to create something similar (no it hasn't got to have the same wattage). I just want to know how he was able to create a coherent laser beam using the DLP projector diodes. What are the best diodes? Is there a large difference in brand? I am very curious about this, because it sounds like making a relatively cheap and powerful laser, which would be a blast. Also how do you determine the wattage of the coherent laser from the wattage of the DLP projectors? I understand how the knife edger works, but am mostly curious about the workings of the projector. Thanks for any response!
 





SpaceWizard said:
After viewing styros video I would like to create something similar (no it hasn't got to have the same wattage). I just want to know how he was able to create a coherent laser beam using the DLP projector diodes. What are the best diodes? Is there a large difference in brand? I am very curious about this, because it sounds like making a relatively cheap and powerful laser, which would be a blast. Also how do you determine the wattage of the coherent laser from the wattage of the DLP projectors? I understand how the knife edger works, but am mostly curious about the workings of the projector. Thanks for any response!
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Not sure what you mean by "Make a coherent laser beam" - by definition all lasers are coherent. If you mean how did he focus them into a beam, then he did it the same way you'd do with any laser diode - using a focusing lens... Looks like he just left the lenses that come with the diode block in place - then he had a whole bunch stacked next to each other (4x blocks of 8 diodes I believe). Looks like NUBM44 diode blocks are the only ones that can make that much power.

Define "relatively cheap" - what kind of budget are you going for?

No knife edging going on in Stryo's video - are you referring to the optics in the complete projector?
 
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I'm pretty sure he said he used knife edgers from DTR, either way that's not the biggest deal. "Relaitively cheap" to me in this situation is under $500. I have found quite a few DLP projectors online for very very cheap. For example here's a bunch of projectors for what may be a good price http://www.ebay.com/itm/LOT-OF-7-MI...400238?hash=item25bef336ae:g:X-gAAOSwjXRXb8Zb. I would expect an array of NUBM44 diodes to be way out of my budget. The projector I linked likely doesn't have a NUBM44 array.

When I said coherent I meant how did he get the beams to not display like a projector(spread out, diffuse) though I suppose the lenses must do that.

Any tips on how to tell what lasers a projector has? Any tips on what brand? Any examples of a good projector to scrap for the laser to follow a little in styros footsteps? Thanks again.

Here's another set of projectors for very cheap http://www.ebay.com/itm/LOT-of-11-x...705106?hash=item3ac6d13f12:g:oYsAAOSwGjpXS6xV
 
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SpaceWizard said:
I'm pretty sure he said he used knife edgers from DTR, either way that's not the biggest deal. "Relaitively cheap" to me in this situation is under $500. I have found quite a few DLP projectors online for very very cheap. For example here's a bunch of projectors for what may be a good price Lot of 7 Mitsubishi XD206U DLP Projectors for Parts Repair | eBay. I would expect an array of NUBM44 diodes to be way out of my budget. The projector I linked likely doesn't have a NUBM44 array.

Any tips on how to tell what lasers a projector has? Any tips on what brand? Any examples of a good projector to scrap for the laser to follow a little in styros footsteps? Thanks again.

Here's another set of projectors for very cheap Lot of 11 x Mitsubishi XD205U DLP Projector for Repair or Parts as Is 082400023391 | eBay
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Just re-watched the video - I see the "knife edgers" now - first time I watched it I just skipped right to the setting stuff on fire part. :D

Neither of the projectors you linked use lasers - both use lamps. Just because it's DLP doesn't mean it uses lasers as a light source. DTR or someone that deals with lots of diodes in volume would likely know what to look for when it comes to projectors that you can harvest diodes from.

Other option is just to buy the bare diodes/diode blocks.
 
Huh, ok. I was under the impression that DLP meant it would be a laser (I was rather confused when reading the product pages and coming across the word bulb). And if I'd need to just buy the bare diodes/diode blocks I'm not sure I could possibly do this, as one block with NUBM44 diodes is somewhere around $500-$1500. These projectors are my last hope at making a rather powerful laser for less than rent. Well, do you know the best way to get into contact with DTR? and thanks for responding.
 
SpaceWizard said:
Huh, ok. I was under the impression that DLP meant it would be a laser (I was rather confused when reading the product pages and coming across the word bulb). And if I'd need to just buy the bare diodes/diode blocks I'm not sure I could possibly do this, as one block with NUBM44 diodes is somewhere around $500-$1500. These projectors are my last hope at making a rather powerful laser for less than rent. Well, do you know the best way to get into contact with DTR? and thanks for responding.
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DLP is just the process used to produce the image: https://en.wikipedia.org/wiki/Digital_Light_Processing

There are various light sources in use with DLP projectors.

You can contact DTR on here - just send him a PM. Other contact information is on his site here: https://sites.google.com/site/dtrlpf/contact-info

There are others that know this stuff too. Note, these people may or may not be willing to impart any information. Up to them!

Could also try searching the forum for relevant info but that may take some time.

Not sure how cheap you'll be able to get a functioning DLP projector with intact/functioning laser diodes - I imagine it'll run close to your budget though.
 
SpaceWizard said:
Huh, ok. I was under the impression that DLP meant it would be a laser (I was rather confused when reading the product pages and coming across the word bulb). And if I'd need to just buy the bare diodes/diode blocks I'm not sure I could possibly do this, as one block with NUBM44 diodes is somewhere around $500-$1500. These projectors are my last hope at making a rather powerful laser for less than rent. Well, do you know the best way to get into contact with DTR? and thanks for responding.
Click to expand...

You have already been given all the answers you need to comprehend what is going on, here: http://laserpointerforums.com/f44/most-powerful-laser-gun-97602.html

Lasers do not work they way you imagine in your imagination.
None of styro's multidoide lasers produce a single "powerful" beam daydream laser you imagine which you seem to refuse to comprehend or understand.

As has been said before about styros 40W homemade laser
"The one in the video is 24 drivers drivng 8 laser diodes, each creating a 5W beam---the beams never combine to make a single 40W beam--they are only 40W total when focused precisely on one spot--8 5W beams on one focal point spot" Not and inch in front of the focal point not an inch behind the focal point--only at the exact focal point. It very little different from from mounting in a circle or on a bar 8 5W hand lasers and pointing them all at one spot

The 200W is just the same type of thing but 4 blocks of diodes-probably 4 diode blocks of 24 2W diodes---there is no and never will be a single "powerful beam" like you imagine .

THe older projector blocks had 24 diodes generally and the newer one have 8 higher powered ones---they both cost about the same,
You realize that all of the original higher power meaning 1W or higher hand held laser were created by using diodes harvested from laser projectors and that most all of the blue diodes for individual hand held laser such a DTR sells were/are diodes harvested from projectors or created to be used in laser projectors--right? Why do you think DTR has a box full of knife edgers from projectors--they are from projectors taken apart to harvest the diodes from them.

You can clearly see the individual beams in both of styro's videos--no single powerful beam is created by any of them.

Given you know nothing about laser projectors and very little about lasers plus that what you want to do can't be done and isn't going to happen--you are never going to make a "rather powerful" laser-- just a bunch of low powered laser ganged together or knife edged whatever which way.
Attempting to do the daydream "rather powerful" laser is mostly just an accident looking for a place to happen and a waste of time and money.

See: https://www.laserworld.com/en/technical-explanations-overview/diode-array-modules-principle-and-differences.html

And as has been posted before see: http://laserpointerforums.com/f51/reference-guide-how-combine-lasers-77449.html
 
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Encap said:
You have already been given all the answers you need to comprehend what is going on, here: http://laserpointerforums.com/f44/most-powerful-laser-gun-97602.html

Lasers do not work they way you imagine in your imagination.
None of styro's multidoide lasers produce a single "powerful" beam daydream laser you imagine which you seem to refuse to comprehend or understand.

As has been said before about styros 40W homemade laser
"The one in the video is 24 drivers drivng 8 laser diodes, each creating a 5W beam---the beams never combine to make a single 40W beam--they are only 40W total when focused precisely on one spot--8 5W beams on one focal point spot" Not and inch in front of the focal point not an inch behind the focal point--only at the exact focal point. It very little different from from mounting in a circle or on a bar 8 5W hand lasers and pointing them all at one spot

The 200W is just the same type of thing but 4 blocks of diodes-probably 4 diode blocks of 24 2W diodes---there is no and never will be a single "powerful beam" like you imagine .

THe older projector blocks had 24 diodes generally and the newer one have 8 higher powered ones---they both cost about the same,
You realize that all of the original higher power meaning 1W or higher hand held laser were created by using diodes harvested from laser projectors and that most all of the blue diodes for individual hand held laser such a DTR sells were/are diodes harvested from projectors or created to be used in laser projectors--right? Why do you think DTR has a box full of knife edgers from projectors--they are from projectors taken apart to harvest the diodes from them.

You can clearly see the individual beams in both of styro's videos--no single powerful beam is created by any of them.

Given you know nothing about laser projectors and very little about lasers plus that what you want to do can't be done and isn't going to happen--you are never going to make a "rather powerful" laser-- just a bunch of low powered laser ganged together or knife edged whatever which way.
Attempting to do the daydream "rather powerful" laser is mostly just an accident looking for a place to happen and a waste of time and money.

See: https://www.laserworld.com/en/technical-explanations-overview/diode-array-modules-principle-and-differences.html

And as has been posted before see: http://laserpointerforums.com/f51/reference-guide-how-combine-lasers-77449.html
Click to expand...

LOLOLOLOLOL. WOW. Is English your third language? You are really a quite misunderstanding and confused person. I understand how lasers work rather well. I know that he didnt have one beam from a single diode or anything like that. I know that it was diode arrays/block. I even said that earlier. You truly are an incredibly unintelligent person. Also you may want to go to the doctor and get your rectum checked for any obstructions.



Seriously though, all I wanted to know was whether I could get some powerful arrays from projectors. That's it. I don't need some bullshit lesson about lasers from some guy who can't come close to comprehending what I'm asking for. Sure it's always nice to read more about lasers, but that's not what my question was.
 
Come on guys. Lets settle down.

We can all teach, learn, and talk and be civilized about it at the same time. Lets be nice. :)

Wizard, I assume you're pretty new to the laser scene due to your newly created account. There is a lot to learn here and I'm happy you have joined us. :D
 
SpaceWizard said:
LOLOLOLOLOL. WOW. Is English your third language? You are really a quite misunderstanding and confused person. I understand how lasers work rather well. I know that he didnt have one beam from a single diode or anything like that. I know that it was diode arrays/block. I even said that earlier. You truly are an incredibly unintelligent person. Also you may want to go to the doctor and get your rectum checked for any obstructions.



Seriously though, all I wanted to know was whether I could get some powerful arrays from projectors. That's it. I don't need some bullshit lesson about lasers from some guy who can't come close to comprehending what I'm asking for. Sure it's always nice to read more about lasers, but that's not what my question was.
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You seemed to show a lack of understanding about lasers - both from this thread and from posts in previous threads - Encap was clarifying some information for you. English may well be his third language, it's a forum on the internet afterall, or maybe he's dyslexic, you don't know so don't comment. He was trying to help you and he got his point across, that's what matters.


You've already been given the information you need or otherwise pointed in the direction of the information that you're after. In multiple threads. Stop being an asshole if you want continued help.
 
SpaceWizard said:
LOLOLOLOLOL. WOW. Is English your third language? You are really a quite misunderstanding and confused person. I understand how lasers work rather well. I know that he didnt have one beam from a single diode or anything like that. I know that it was diode arrays/block. I even said that earlier. You truly are an incredibly unintelligent person. Also you may want to go to the doctor and get your rectum checked for any obstructions.



Seriously though, all I wanted to know was whether I could get some powerful arrays from projectors. That's it. I don't need some bullshit lesson about lasers from some guy who can't come close to comprehending what I'm asking for. Sure it's always nice to read more about lasers, but that's not what my question was.
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Wizard, you've entirely missed the point (and shown great disrespect in the process). We all know what you are asking for.
We have been trying to emphasize that you SHOULD NOT attempt this until you have years of experience with lasers. You seem to have no understanding of laser safety. Do you even have safety goggles?
 
SpaceWizard said:
Seriously though, all I wanted to know was whether I could get some powerful arrays from projectors. That's it. I don't need some bullshit lesson about lasers from some guy who can't come close to comprehending what I'm asking for. Sure it's always nice to read more about lasers, but that's not what my question was.
Click to expand...

Look, given the threads you started and your posts it seemed that you didn't know what you were attempting to talk/ask about.
Perhaps you do know everything and it is YOUR English language skills that are weak/off but then why the questions in your threads?
Things like "make a coherent laser beam", "a cheap and powerful laser", "my last hope at making a rather powerful laser " don't make any sense in the context of projector diode arrays and show little if any comprehension of the subject.
I went over some old ground and added some to it because of your expressed desire to make a 100W laser gun in this thread here: http://laserpointerforums.com/f44/most-powerful-laser-gun-97602.html
Another consideration when making my comments was people, other than you, who may not know about the subject read these threads, also.

Sure, you can buy as many DLP laser projectors as you want and use the laser diode arrays of whatever output power laser diodes X the number of them in the array or you can buy whatever number of laser diodes you want, wire them up to an appropirate power sources and turn them on at the same time. The point is they are just a bunch of whatever output power laser diodes ganged together and do not constitute or create what your words express "a cheap and powerful laser" and don't make what you imagine, "my last hope at making a rather powerful laser ". It isn't what they are or do.
They are just a bunch of individual lasers/laser diodes of whatever output power each---not "a rather powerful laser" (singular)---which seems to be what your are after or have on your mind for whatever reasons. I was trying to get across that point and called it a daydream for obvious reasons.

Maybe use the search function of the forum and find out more about projectors and the laser diodes they contain. or message DTR or styro.

THe other points diachi and Sta covered.
 
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I don't want to get involved in the fight but which type of projectors have the laser diodes (big or small does not matter) because I want to make a laser but i'm thinking it will be cheaper to get a broken projector then a bare diode. ps If I do get a cheap projector Ill sell them for the price I got them plus shipping to anyone I just want to give back a bit to lfp because I have learned a lot from it and of course make a laser or 2
 
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