Having Fun With Green Lasers
Today, just about everyone owns a red beam laser pointer. Whether it has been used at work in conjunction with a PowerPoint presentation or to amuse yourself by teasing your cat or dog or, better yet, used to plant a red dot on your friend’s forehead, red beam lasers have been around for a while and contributed to many fun moments in the lives of otherwise sober techno-geeks and non-geeks as well.
But now the novelty of red-beamed laser pointers has worn off. They’re nothing new to see, and almost everyone has one. It’s a good chance that even your grandma, who has no idea what PowerPoint even is, has one. If you want to get the best technological toy out there, you’ve got to move to the next level.
Now, take a look at the new green laser pointers. And I’m not talking about that other kind of “green” where everyone is recycling their old newspapers. I’m talking about a cool new laser pointer that uses the far more powerful 532 nm wavelength; which, as any geek worth “his or her salt” knows, is tons better than the old 650 nm wavelength used by the red laser point. And, best of all, all that extra wavelength means it’s really truly green.
So if you got your kicks by using your old red laser beam to highlight things on a projection screen across the room, imagine how good you’ll feel using a green laser pointer to highlight things that used to be out of reach. Because a green laser beam is more powerful than a red one, it can highlight clouds, low-flying aircraft, and even star constellations. Best of all, you can see the green laser beam outside during full sunlight.
In fact, if you use this laser outside and happen to point it at an airplane, it’s so powerful you could find yourself in a bit of trouble with the government because pointing a sighting device at a plane could get the feds investigating what other reasons you might have for pointing a powerful laser beam at planes. Can your old little red laser beam get you in that kind of trouble?
And the green laser pointer doesn’t produce just a wee little spot. You can see the whole beam as it travels to the stars. Think Luke and his light saber. See the possibilities?
A green laser pointer is at a whole separate plane from the old-style red laser pointer. For a true green, a pointer needs a green direct injection laser diode. These diodes could be potentially dangerous if handled by the public at large, so they’re not even available wholesale. So this complicated process follows to keep hazardous material out of peoples’ hands. (And only the geeks in the room will understand a word of it.)
The green laser pointers you can buy on the market now are all using the very impressively named Diode Pumped Solid State Frequency Doubled technology, which gets shortened to DPSSFD, which is good for everyone. What this means is that an infrared laser diode pumps out 808 nm which is then altered to 1,064 nm which is then shot into a crystal that doubles the frequency to produce the green beam at 532 nm. (With frequency, smaller numbers mean stronger, but you knew that right? Only a geek actually read this paragraph.)
For all these reasons, green laser pointers are the cool new technological gadget that all your techie friends will love. They were actually created in 2000, but outside highly technical fields they’re still virtually unknown. Be prepared to pay a heftier price, though. Red pointers cost less than $10, but a new green laser pointer can be as much as $50. But it will be worth every penny. How could you resist such a powerful new device? We know you want one.
No Comments »
RSS feed for comments on this post. TrackBack URL
