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ArcticMyst Security by Avery

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Re: new to laser tech and have a unique question

I've been through school for electronics and acoustics etc. so please do not treat me as a complete noob :undecided: I completely understand the mechanical function of a laser but my school has me on a special project.

I am to find a way to create a wider beam with no loss in output and I don't understand what to do. Could someone tell me how a beam could be widened to say a 10 mm beam that can raise the temperature of a viscous liquid to 430 degrees instantly. Some kind of liquid conductor thing we are doing. Would this require an initial capacitor to burst the laser or would this require an array of three diodes housed together?
I was thinking of a beam expanding lense and increasing the voltage to maximum? This is where I am lacking in experience and would love some guidance. I'm limited in funds and can't play with too many things at home and only have access at school and I am trying to take the initiative
:yh:

A capacitor burst to increase the voltage of what? A laser does not output voltage nor is it driven by voltage---what you are wanting to use is light matter interaction and optical phenomena to heat a "viscous fluid"
In order to induce a structural transformation in a material by means of light, the absorption mechanisms and dynamics have to be considered. Have a look at : http://www.io.csic.es/Web_GPL/personal_pages/Jan/thesis/Chap1.pdf

There is no loss of output with a wider beam----the output of a laser is the output --- example 1000mW/1W It is the power density that chnges when you widen a beam--by definition, power density is power per unit area which is usually expressed in terms of W/cm2. You can have 1W focused on a small area 1 square cm circle or or 1W focused on as large and area as you want example 1000 cm circle---what changes is the power density the W/cm squared---power output is the same in either case 1W.

If you are thinking to use photon transmitted energy/laser output to heat something, you need to know what wavelengths your target can pass, absorb and reflect and how efficiently and under what conditions.

You then need to determine the energy density of a given laser wavelength that your target can absorb that you need to raise the temp of your viscous liquid target from whatever temp it is to 430 degrees over an amount of time you think qualifies as your "instantly".

From what your requirements are -- limited funds + " This system needs to run on the equivalent of battery voltage as it is part of an onboard system and can only consume a small amount of power. As little as needed to accomplish the feat and as this is a custom sensor of sorts it can't ad too much bulk. The engineer would like to keep the unit to the size of a handheld device or a large handheld laser to fit within the size constraints of the overall design." I doubt it can be done ---burning wood with laser energy and heating a liquid like you want to do are very different things.
 
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Joined
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Re: new to laser tech and have a unique question

they need special optics that look opaque to you.

That's not always the case. Please familiarize yourself with ZnSe.

With a widened ed beam power will drop off

You mean power density.

The only laser that could do something like that would be a c02 laser

That's incorrect, and you've been here long enough I shouldn't have to explain why.

I am to find a way to create a wider beam with no loss in output

Sorry. Physics says this is impossible. All optics have some loss.

...raise the temperature of a viscous liquid to 430 degrees instantly.

Sorry. Physics says this is impossible. All temperature changes require a time geater than zero.

...a closed environment.

Sorry. Physics says heating things in a closed environment usually leads to explosions.

...an onboard system and can only consume a small amount of power.

Okay, you've now asked way too many impossible things of a laser. Surely you must realize you can't get power from nothing.

You need to VASTLY relax ALL of your requirements, or cut your losses and scrap this project entirely.
 

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Re: new to laser tech and have a unique question

Okay, you've now asked way too many impossible things of a laser. Surely you must realize you can't get power from nothing.

You need to VASTLY relax ALL of your requirements, or cut your losses and scrap this project entirely.

Cyparagon-- on the money, 100%

Kurtfgx-- I think the disconnect is that you imagine a laser beam as hot or heat.
A laser beam has no temperature - there is no inherent "temperature" to a laser beam. Heat is the random motion of matterparticles (atomic or molecular particles). A laser beam itself is not made of matter but of ‘photons, which have no mass, thus a laser beam can have no temperature.
"Heat" is caused by a laser beam energy being absorbed by a material surface and turning from light energy to heat energy. Effectiveness at heating up a material with a laser depends on the energy output of the laser , the energy density of the laser beam, the wavelength of the laser, and said materials ability to absorb the energy of same.
 
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Re: new to laser tech and have a unique question

I've been through school for electronics and acoustics etc. so please do not treat me as a complete noob :undecided: I completely understand the mechanical function of a laser but my school has me on a special project.

I am to find a way to create a wider beam with no loss in output and I don't understand what to do. Could someone tell me how a beam could be widened to say a 10 mm beam that can raise the temperature of a viscous liquid to 430 degrees instantly. Some kind of liquid conductor thing we are doing. Would this require an initial capacitor to burst the laser or would this require an array of three diodes housed together?
I was thinking of a beam expanding lense and increasing the voltage to maximum?
:yh:


Given the fact that you completely understand the mechanical function of a laser and are not a complete noob, I'm sure you are aware that this is a tall order. And being limited in funds makes the task particularly difficult, because initial capacitors are fairly expensive, as are power sources that can go as high as maximum voltage ( though, one time, I did see a power supply with a dial that went up to 11). I would advise against any approaches that result in bursting your laser, as replacing the laser after every attempt tends to drive costs up very sharply.

However, the fact that you provided very detailed information about the materials being used, their specific properties and the conditions of the process, as well as the objectives of the project, helps a great deal in avoiding the need for any guesswork. I was able to employ my time-tested process of elimination (I thought about it while I was in the can.) to find a solution.

There is only one device I know of which might satisfy all of your requirements. It is portable, handheld, and EXTREMELY POWERFUL. You will need to learn how to use it properly and safely before attempting to do anything with it while other people are present.

You can purchase one HERE.

Good luck, and BE CAREFUL!
 
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Re: new to laser tech and have a unique question

nonsense
 
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Re: new to laser tech and have a unique question

have a lot to work with here.

Thanks for positive replies those of you who did and the negative nancies will be surprised with what I am cooking up. stay tuned





:lasergun:
 
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Re: new to laser tech and have a unique question

Ya know kurt, the members here aren't idiots. You may think that you were being cleverly vague and evasive in your description, but anyone who's even casually paying attention knows EXACTLY what you're "cooking up". Did you really think anyone believed your "school project" story? The second you started talking about heating some nondescript "viscous liquid" your whole cover story went up in smoke (or, should I say VAPOR?).

And, BTW.....when you open up a thread by telling people not to treat you like a noob, and claiming to "completely understand the mechanical function of a laser", and then follow immediately with statements and questions demonstrating that you clearly have absolutely NO IDEA what you're talking about......well, you're just begging the general community to call you out. Just something to think about before calling others "mentally challenged".
 
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Re: new to laser tech and have a unique question

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Re: new to laser tech and have a unique question

I only read until the end of the first paragraph you wrote. You are incorrect and my application is actually automotive related.

Your negative and malicious attitude is odd and my suggestion is to go release some stress before attacking people in a laser forum. chill out. ..and you aren't as clever as you think either. You could not be more incorrect.

if you do not have a sense of humor then do not even talk to me. This is a forum and I started this thread for constructive conversation. If you can not be normal and sociable with a good CONSTRUCTIVE attitude, you have no business interacting with me here. If I choose to comment on your thread then that will be your topic and I won't intrude.

I do not have the patience for negativity to the level of yours already starting drama and making assumptions in an internet forum. reply to the topic or don't reply at all. I'm not interested in ignorant rambling and now you do seem mentally challenged and you have wasted five minutes of my time replying to your nonsense.

Wait. What am I thinking now? is this a new age psychic forum or a forum for intelligent minds to come together?

:thinking:

Well it iiisss a bit suspicious. Can you just tell us what it is? Also you can't really do what you want with something the size of a handheld, at least not with the time constraints. A pic of your setup would also be very helpful. :)
 
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Re: new to laser tech and have a unique question

children get along
 
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Re: new to laser tech and have a unique question

Okay... Bye then.

That wasn't really on my mind until AJ brought it up.

But since you're being so damn defensive it just makes it seem even more suspicious. You can't blame people for thinking that you might be up to no good, especially in the day and age we live in. But as soon as people voice their concerns you go on the defensive and tell them they're being childish and then get up and leave. The Harry Potter thing was a bit out of line, but what you were asking for was near impossible, and you had zero patience. You seemed like a nice guy, and your project sounded interesting. You just can't be too careful. If you still want help PM me, I'm not going to be replying to this thread anymore. If a mod could at least lock this so it doesn't get any worse that'd be great.
 
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Re: new to laser tech and have a unique question

the only thing suspicious here are the people who distrust, assume and fantasize.

There are no images of the yet to be created sensor and the most I can divulge is this is a sensor project to upgrade technology. With higher powered lasers and more durable components and manufacturing processes these days, some are playing with new ideas including lasers for sensing. nothing new.

I'm going to save the information and delete the thread. it is clear that people like to bring up harry potter wands, paraphernalia and their own interjected nonsense

I came to what I thought was a professional forum of engineers and what I get is a shitshow of kids with egos .

for those of you who helped you are honorable and for those who can't rise above a childish game, goodbye.

My 2 cnts, your posts make people fantasize reading your writings. No pictures, drawings etc.
You're absolutely correct that it is a forum, and nobody wants to spent more time than they want, thus make a drawing what you want to accomplish (do schools still teach technical drawing these days?) Then you'll get more constructive suggestions. We are here not to do your homework :whistle:
 
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Re: new to laser tech and have a unique question

good luck to you mental midgets who start drama in internet forums. Haven't seen that level of immaturity since an aol chatroom in 1999


the original post was regarding the project I am working on for an upgrade in sensor technology for an automotive application. forget I even tried. thanks for those who are men with wits and class.
 
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joeyss

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Re: new to laser tech and have a unique question

good luck to you mental midgets who start drama in internet forums. Haven't seen that level of immaturity since an aol chatroom in 1999


the original post was regarding the project I am working on for an upgrade in sensor technology for an automotive application. forget I even tried. thanks for those who are men with wits and class.


Ok I swear this whole thing is a troll attempt now.


If you wanted people to help you should of chilled out.
 
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Re: new to laser tech and have a unique question

Ok I swear this whole thing is a troll attempt now.


If you wanted people to help you should of chilled out.

He edited his posts, the whole conversation looked a lot different.
 




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