The Truth About Laser Pointers

Laser pointers have been around since red laser diodes look to have been on the market which means they are older than most teenagers who bought them. Laser pointers are usually made from direct diode lasers or solid state laser diodes (DPSS). Direct diode pointers available in red or violet (made from Blu-Ray lasers at 405 nm WL “nanometers wavelength”) and direct diode green are likely to be available soon thanks to a company called KAAI that develops them for the laser projector market.

Red laser pointers are available in various wavelengths such as 635 nm, 650 nm, 660nm, 670 nm.

DPSS laser pointers are usually available at the following wavelengths, (blue) at 473 nm, (green) at 532 nm and (yellow) at 589 nm and (orange) at 593 nm. Because the human eye is most sensitive to green with a clear peak brightness at 555 nm this means that all the other visible colors look less bright despite the same power level. The difference in brightness of a clear color is basically expressed in this ratio with green at 514 nm being (1) then blue at 488 nm becomes (2.6 times smaller than green) and red at 647 nm becomes (4.6 times less than green). Previous ratios and wavelengths can be found in the mixed Argon / Krypton Ion gas, a white light laser used by professional laser show companies. The color brightness ratio will vary according to the wavelength but the above given ratio will give you the right color balance of white light. To summarize the 1 watt green laser at 514 nm it seems as bright as a blue laser 2.6 watts at 488 nm and as bright as a 4.6 watt red laser at 647 nm. You should consult a color chart to compare the clear brightness of other laser wavelengths.

Some things to consider If you want to buy a DPSS laser pointer is the power level and the way the diode is operated. What I mean about power levels, is the actual power level measured at the operating wavelength. Because a typical green DPSS laser pointer has several laser wavelengths involved to produce twice the frequency of visible output, unless the manufacturer provides good filtering, the power you measure at 532 nm may also come from 2 other IR laser wavelengths. You can actually get cheap laser pointers that emit infrared light (808 nm and 1064 nm) almost as high as visible light, which can be very dangerous and deceive someone who thinks they are buying a house that burns paper. Another thing about DPSS laser pointers is the way the diode pump is operated, which can be pulsed (turned on and off at a fixed frequency) or a constant wave of CW (continuously). It’s easy to determine if you are buying a laser pointer DPSs are pulsating because you will see lines that are cut if you move the rays quickly across the wall or ceiling.

The last concern with laser pointers is the biggest, namely security because the ever increasing power output is available today. Usually laser pointers are limited to 5 milliwatts but there are manufacturers that seem to serve clients who want more power like Evil Lasers in China that provide pointers that are more like flashlights, producing power levels as high as 500 milliwatts of green or red. It also doesn’t take rocket scientists to buy raw laser diodes and drivers to make them themselves higher than legal laser pointers.

To provide a perspective on the power level, a 5 miliwatt green laser at 532 nm would be enough to enchant your night-adjusted vision and might cause an automotive accident to say one hundred meters from the source. Conversely, a 500 milliwatt green laser can easily cause permanent damage to your vision, ignite fires by burning paper or other combustible material at close range and inevitably distract airline pilots who approach the runway at a distance of one or two miles. Safety is everything when it comes to laser pointers.

Because laser applications are so widespread, we cannot prohibit them but try to apply better control over their use and distribution. Lasers are strictly controlled by the Food and Drug Administration, the FDA in the United States and other regulatory bodies that are related to countries that produce and sell them.

To be sure, lasers are inspired by science fiction and laser pointers attract not only fans of Trekkies and Star Wars but people from all walks of life. Be it sports enthusiasts who are eager to influence the results of home games or grandma gets her training and cheap entertainment while playing following the red dot with 10 of her cats, lasers are everywhere.

I have worked with lasers for more than 20 years. I have designed, built and operated laser projectors for more than 10 years. As a laser or laser operator, I enjoy another path to creative expression using this extraordinary media to help the charity I choose. I am also a Stained Glass artist with more than 20 years of experience.

Buying Green Laser Pointers 532nm Tech Tips and Reviews

There are various types of pointer lasers available online today that can be bought easily. But the fact that there are thousands of green laser models to choose from can make it rather difficult to determine which is the best value for your pointer sales.

Here are some technical tips and review points to keep in mind every time you consider buying a green laser pointer.

1. How much output power are you looking for in your green laser?

A typical low power indicator produces a green light frequency at 532nm through 5mW and is the most commonly used laser beam device. However, the latest developments in the field of laser technology and stability have enabled the creation of very powerful lasers from 15mW to 500mW, all in hand. There is even a green laser that can burn plastic, light matches, pop balloons, and be visible for more than 50 miles. So, knowing how much output power your specific application requires can be vital for determining which green laser you should buy.

2. What conditions will you use under a laser pointer?

For example, is there any weather to worry about, or are you planning to buy a green laser for astronomical purposes through a clear night sky? Whatever your application, there may be a need for security measures to be inserted into the laser device itself. Like a basic water check, or close the blending lense that allows you to determine the beam to be wider or thinner. Also, if shock protection is required for high-speed laser or mobile use, other model specifications need to be considered such as an improved solid casing and internal diode shock protection.

3. What price range are you willing to spend to buy your green laser pointer?

This can make a big difference in the type of laser you buy and the quality of the diode you are considering buying. Because lasers may have very low prices, $ 20 or less, that doesn’t mean that the device is a high-quality laser instrument. In fact, with high precision tools like lasers the lower the price the more often the worse the quality. A good price range for 5mW is between $ 49.99 and $ 74.99, while other more powerful lasers can range from $ 100 – $ 1000 or more. Do a little research on the quality of any laser and how it relates to prices can save cash and headaches from poor quality sales.

4. How often do you use the laser and what type of life time do you expect?

Because different lasers produce different output forces and use different resources, not to mention the difference in the quality of the green diode, there can be some major differences in the expected time from certain laser pointers. A typical cheap laser pointer will run out in less than 100-500 hours of use, while, high-quality pointers will have a life expectancy of 5000+ hours as standard, usually with a standard 3-6 month warranty.

Obviously the difference in quality laser pointers and companies that provide them requires anyone considering buying a green laser pointer to do a little research on what they are actually looking for to get a good deal. Like other high-tech luxury items, especially those used for tactical, scientific military, and even medical use can really require some specifications that are better than typical low-cost laser key chains you are bound to rest in a few hours.

So be sure to look at some of the leading laser pointer model reviews or find a truly reputable company that offers not only a wide variety of lasers, but at a reasonable cost with the highest quality design standards in mind. This may require a little search, some simple Google searches can usually complete the job, be sure to record prices, mW (output power), and a lifetime warranty every time you plan to buy a green laser.

Don’t let low price appeal or good pictures get the best from you, quality cannot be replaced by good looks. You want a laser pointer that produces a spectacular visual green laser beam with great stability and quality collimation, the less refraction and the clearer the better the quality of the laser you want to buy. Checking some videos or testimonials can make all the difference between educated purchases and sales thrown into the wind.

Green Laser Pointers Are Fun But Do Not Use Them Near Low Flying Aircraft

Laser pointers are very fun to use, but I will emphasize that they must be used responsibly. I’m not sure they are suitable for young children because they won’t realize the power of the pointer.

I read a day or two ago that some models of green laser pointers can reach a distance of 80 miles with their emission, which seems quite reliable isn’t it?

You have to be extra careful using your laser to the sky if you live near the airport. I have read reports of aircraft crashes landing, this will be a very clear indication of irresponsible behavior with this product.

You can do target training with balloons, and lighters with light [allow hope that pyromaniacs don’t get their hands on this pointer]! Some are strong enough to actually light a cigarette and cut a light outer package.

They will light up the sky for you so you can see all the stars. This will be very interesting if you like astronomy as a hobby. If you want your children to learn about the stars they will be able to see exactly which star you are talking about if you use one of these laser pointers.

I understand that the reason for green light is very clear is that the human eye is more sensitive to green than other colors used for this pointer. This is undoubtedly the reason why it is possible to see such a ray being spoken.

This laser pointer has various strengths, from 5 mW to 700mW, that is quite diverse. Not surprisingly, lasers are used by the military to mark targets very specifically.

You will find that even a lower mW will illuminate a dark room, maybe not like a normal torch does, but enough to see your way about I’m sure.

Animals also have fun, they chase blocks thinking it’s a piece of string, but make sure you don’t let it enter their eyes. The lower mW will not damage anything, but it is on the safe side away from the eyes.

You might want to invest in laser glasses, this will give you full eye protection from various purple, blue and green lasers.

Always remember that using a laser pointer green, red, blue or whatever should be fun but should not be used to interfere with the lives of others, not shine in the house or neighbor’s window, never shine on the driver of the car and not the plane in the sky. If you obey all these rules then you can have fun with the laser without disturbing others.