Assume I have a laser diode optical output of 1w, & a pupil size of .25" in my eye (@ Night). If I shined that 1W Laser directly into my eye, I will be blind instantly. However, what If I put that 1w through a lense & disperse it out into a circular area. I should only need to have a large enough circle so that the fraction that would go into my eyes is a safe amount, correct? Area of a Circle = Pie * (R)^2, So I can just figure the fraction of the pupil's area to the larger circle's area. I only need an "Eye-Safe Level," which I'll call 1mW. So I have (Diode Power) x (Pie * (.25")^2) / (Pie x r^2) which equals 1mW. Hence, 1000 x (1/16) / (r^2) = 1. Radius = about 8" or 16" in diameter. This means that If I have 1 watt of light, going through a lense , & spreading out into a 16" circle of light, and that shines directly into my Eye, my eye will see 1 milliwatt correct? ^Assuming I am using a single Mode diode, isn't this correct? This is just one of the responses I was given: When you use a lens to disperse your laser it is not the size of the lens but the index(material), lenticular power(diopters), and the focal distance(in meters) that gives you the dispersion equivalent. Thus to calculate the dispersion factor you could use a down stream vergence equation. The problem is that it will not calculate the watts as it is diverted. It calculates the dioptric equivalent. Instead of using Diopter you would maybe able to substitute with watts. So lets say you have 1W hitting a diverging lens (I would recommend biconcave lens (which I have many)) you might be able to determine that 16mW is at a point "x"mm behind the lens. Your pupil is an aperture of 0.25" (strongly recommend you use metric in your equations). Your pupil is x distance from your retina. When your laser of 1W hits your retina that's when you go blind. Thus if you are going to disperse the laser this aperture will come into play. This will block the already previously determine X factor depending on how fast the lens disperses the laser (dioptric power of the lens). Any thoughts?
The laser on my Surefire X400 is the brightest red laser on the market and holds zero even under repeated high recoil round counts. It'll also burn your eye out if you look at it. Does this help at all? Nope, didn't think so.
hahahaha, you can't answer it can you? Not intelligent enough? Didn't think so. It's for a project, not homeowork.
I wouldn't try & point out my bad grammer. It's a forum... What's the point of language? Comprehension. Regardless of my spelling, you still comprehended everything I said. Yeah, don't try it man. I'm probably more intelligent than you. Can you even comprehend the first post in this thread?
I don't think anyone is trolling. It just sounds like you're looking for more homework answers. Calling everyone idiots and less intelligent than you is going to get you really far.
Wait a second... You're the one in here asking us for the answers to your homework (and you can't even get there, their and they're right) and we're the dumbasses? Sounds like someone needs to back the retard throttle down a bit.
You know that there are engineers posting in this thread, and they are choosing not to answer a question that they feel is inappropriate, right? I don't think your name-calling is helping the situation either. Looking forward to seeing the rest of this thread...
This. All of it... assuming my tiny little brain is correctly comprehending what you are posting, of course. U our teh moar smarter.
This thread is lost. Closed. Points assigned. Look, dude... I'll give you the benefit of the doubt and assume you're on the up-and-up and you truly just need some insight (regardless of what my experience to date would suggest). You'll get the same ribbing whether you're posting for a hobby, profession or college course if you don't provide some basic stuff. The first thing is describing the actual problem you're solving. Context is valuable. In technically nuanced environments, this is a huge boon for helping us help you. Next, AND MOST IMPORTANT, is what you have tried so far along with the results of those efforts. This takes care of people who feel taken advantage of whereas they know you're trying and are legitimately stuck. It also takes care of the folks who want to make sure people are engaged before putting a lot of effort into helping them pull through. I've gotten in the habit of making sure I'm including enough detail to make it obvious I have drilled the issue on my own and have results to show for it before I post in tech forums. Sometimes I still forget that people aren't right next to me and have no idea wtf I'm on about... But really, what kind of project gives you a number of "responses" to a practical challenge? It's not a problem if it's homework. Just show you put in some effort and focus on one specific hurdle that's slowing you down. You don't have to like it, but that's the way things work in pretty much every online community that's worth asking for help. Pedantic debate isn't going to change that.
