Future of lasers

Some disturbed little twit is going to take an ebay multi watt to school and blind some children, that will about do it. God I hope not but I fear it.

Of course a bunch of lobbyests that write the propaganda for The Business Insider are going to complain about anything that doesn't allow them to do what they like and try to limit citizens' redress of harm done to them by these entities, and is going to call ALL regulations bad and need to be done away with. But, regulations are just the laws that everyone needs to adhere to in order to have a society. Yeah, if you took 180000 pages and put then on printer paper they could stack as tall as six stories, but you are talking about every law written concerning every person and legal entity in this country. I personally like my water free from heavy metals and water borne pathogens, and I want the air around me to not be filled with these same harmful agents, or the soil to be free from lead and mercury and arsenic. I want to be able to sue drug companies that can be shown to have kept harmful side effects out of clinical trials, thus bringing their multibillion dollar drugs to physicians to prescribe to unsuspecting patients who are harmed or killed by these products. No one is against ALL regulations. Even the businesses that complain about them want the law to protect their intellectual property. Trump is not changing anything for the better of common people. You can bet he is hanging on to those regulations that allow him to make his money with as few redresses as he can get done away with.

just a quick thought about our beloved 520nm greens,on the next 5 years we will have multiwatt greens like blues althought the divergence will get worst.greens seems to follow the timeline of greens,imagine those 1w diodes that we curently have to be like an A140 blue diode back then and how much things have changed since then

It might not happened that quickly as green is so much more visible than 445nm blue. There was good reason to get higher power blue diodes. Less so for the green ones.

For the sake of projectors and such there was a need to get as much blue as possible - both by driving the power up and the wavelength down, with little regard to beam quality.

In video projectors the beam quality really doesnt matter much, those work just fine with something like a halogen lamp as the light source, the higher efficiency being the main advantage of using laser light sources.

In order to get a source of affordable, high beam quality diodes there needs to be consumer application for them. Optical disk storage was ideal because that requires single mode diodes to work.

To be honest i think even if something like holographic storage was developed for consumer use they would not use a visible wavelength. The 405 nm single mode diode technology is very mature, and i see no reason to use a longer wavelength really.

So it leaves very little, apart from projectors that actually scan the image (as you would with galvo's and such in a lasershow). Using scanning like that has some advantage over current technologies like DLP or LCD image formation, mostly having complete black as well as possible reduction in power usage. This would be a similar thing to comparing LCD tv's to OLED or plasma ones.

It may work if we somehow can take the moving parts out of the scanning process, mirrors just don't move quickly enough to project high resolution video (as in 4K or something) even with very expensive laser show equipment, let alone something a consumer could afford or want.

I can see them going to a shorter wavelength more than a longer one. It is interesting to read all your comments. I think the ions will be gone and no longer made fairly soon but maybe I am wrong.. I just hope that the DPSS lasers won't totally dissappear Thanks for all the replies keep them coming. Tom

I just hope someday there will be a drive to produce direct orange, yellow, and pink diodes. I wont hold my breath..

A bit off topic to the direction of the thread, but a way of using lasers to send particles into the past has been worked out, in theory, but it appears to be workable.... if we can do that, we can send information back into the past to advance humanity, and civilization of the future can send information back to us to do the same.

The way I understand it we can slow the forward progression, we have seen velocity time dilation and gravitational time dilation moving forward, rather we can experience time dilation, we have to account for the earth's gravitational effect on the fabric of space/time in order to calibrate our GPS, but everything we have seen is an effect of time moving forward, I just don't see how it's possible to " go back in time "

Time is really just a measure of things happening, and a capsule orbiting the earth at high velocity will experience a slower rate of change/time passage, but the concept of reversing is like getting water to flow back into a faucet.

Think about this : If time, that is the rate of change can be slowed in a capsule in comparison to the rate of change on the earth, then IF reversal of time was possible in say, a capsule, then it would only occur in that capsule and not on the earth, so reversing the rate of change past a dead stop, which I don't think is even possible, but if it was, is not likely to happen everywhere at once, but only in the capsule/place where the rate of change is effected.

----EDIT----

This demonstrates why it's impossible unless the capsule appeared to be moving normally as seen from earth, but it's occupants grew younger, but then would not the electricity flow backwards in the capsule, ....also as we approach the speed of light our capsule would become infinitely heavy and elongated. Now supposedly time can stand still at the event horizon of a black hole, that is under an immense amount of gravitational force, it appears to be impossible to go " back in time " through velocity or gravity or combination of both.

Bacon said:

I just hope someday there will be a drive to produce direct orange, yellow, and pink diodes. I wont hold my breath..

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As far as I know, there has never been a pink wavelength, so I don't see it happening, unless you are talking about combining RGB lasers to "create" colors.

I think 635 and 450 together is a beautiful color and as per time dilation that is a real interesting topic.. and I believe there is a lot to it.

there is not a pink color at least not on the visible spectrum,on the other hand could it be posible to produce an emmiter that emits 2 different wavelenghs at the same time? we could have some very nice colors that way

Yeah I have this little RGB laser from Laserlands and the 532 nm laser wire was loose I powered the unit up and all i got was the blue and the red laser and it was the most beautiful pinkish purplish color I ever seen. No I agree there is no such thing as a pink laser. or wavelength it's not a primary color. but those two colors together was really neat. I am learning more about the RGB stuff, and I bet if you get an analog modulated RGB unit you can get even better colors. I am getting to really love the RGB lasers

paul1598419 said:

As far as I know, there has never been a pink wavelength, so I don't see it happening, unless you are talking about combining RGB lasers to "create" colors.

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paul im so glad you mentioned this because i need help. I promised my girlfriend that i will finally start that Magenta project, i need to find out how to get the right dichro but i really dont know what kind to get. what type should i get? I found that the right mixture was about 600mw of 405nm and about 200mw of 650nm, or even 638nm will work but how should go about getting these to mix well? thanks paul

Why 405nm, Richie? I would think 445nm would work better. There are two ways to go about it. Get a pass red reflect blue, or a pass blue reflect red dichro. Then at 90* to one another, you only need to align the diodes and the one dichro.

paul1598419 said:

Why 405nm, Richie? I would think 445nm would work better. There are two ways to go about it. Get a pass red reflect blue, or a pass blue reflect red dichro. Then at 90* to one another, you only need to align the diodes and the one dichro.

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to tell you the truth ive never actually tried with 445nm, ill try that right now since ive got all my lasers scattered across the floor lol!
now i got some dichro's to look for, im sure ebay is the best place? i really appreciate the help Paul :beer: