Green Laser Pointer With Black Casing
- 30-50x brighter than a red laser
- Beam can be seen in midair
- Brass body with black matte finish
- Output power: <5mW, wavelength: 532nm
- High-quality lens emits a focused round spot
This Green Laser Pointer comes in our beautiful Black Matte finish. Green lasers has so many uses: * Astronomers * Teachers * Students * Bird Watchers * Presentations * Tour Guides * Construction Workers * Scientific * Military * Security applications * Forensics Investigations * Play with pets (Dogs and Cats LOVE chasing the laser dot) Use to point out distant points of interest Imagine a bright beam of light that is visible from up to 2 miles away! It has a Class IIIa rating, this is the most powerful green laser allowed within the law. Featuring a high-intensity, 532nm wavelength and powerful output of <5mW, our pointer will shoot up to 10,000 feet (less in daylight). Operates on two AAA batteries, included with a solid carrying case that will truly protect this investment.
Class: IIIa Output Power: <5mW Wavelength: 532nw Expected Life: 5,000 hours Battery: 2 AAA Included, Solid Carrying Case and 90 day warranty.
WARNING: Laser Radiation. Never look directly into the green laser beam. Never point a green laser beam at a person. Do not aim the green beam at reflective surfaces. Do not allow children to use green laser pointers unless under the supervision of an adult.
List Price: $ 149.99
Price: $ 1.82
Priced reasonably: But inconsistent quality.,
Producing green laser light is a significant technological achievement. A low powered high quality green laser is very expensive so having one that works and costs less than $10 is amazing. These cheap lasers should be viewed as a very cool novelty item but not as a serious tool for full time use.
I have bought 4 green lasers (1 from a local merchant and 3 from HDE with “Fulfillment by Amazon”) The laser I purchased locally had a black casing and 2 of the lasers from HDE had a black casing and the third one had a silver colored casing. All three of the black lasers worked with the batteries supplied. The silver laser was broken. The push button had fallen out and the laser module was sliding around in the case. I’m an engineering geek so I took it apart and fixed it. All 4 lasers had inconsistent beam quality. The three black ones were fairly bright, the silver on wasn’t as bright (useable as a lecture pointer but not bright enough to have a “light saber” like beam when used in the dark. The three black ones had a clearly visible beam when used in the dark).
There are several design deficiencies with all the lasers. The first problem is that they use AAA batteries. Unlike red lasers that draw only a few milliamps green lasers draw about 350 Milliamps. That current draw is too great for AAA batteries so you would be lucky to get much more than 20 minutes of runtime. The electronics that control the current to the module are poorly designed. The regulator chip is undersized so it starts to overheat quickly and it starts a thermal shutdown by limiting the current and causing the laser to dim. Secondly the regulator circuit “wastes” about 0.8 volts. The laser module needs about 2.0 volts to operate and with only 3.0 volts from 2 fresh batteries and 0.8 volts lost across the regulator it takes only a very short time until the batteries are too low to operate the laser. If the unit was designed to use 2 AA batteries and the regulator design was improved the unit would be much more reliable and useful.
My interest was to experiment with these units. I have taken all 4 units apart and have modified them to meet my needs. For me a reasonable expense for some interesting experiments. All 4 units had a similar design but each one was unique. There were three different designs for the electronics. All the laser modules were different sizes, 3 had similar diameters and the fourth one was about 1 mm smaller. All 4 were different lengths. (including 2 units purchased at the same time from the same vendor and with the same part number on the box) Two of the black cases were made from brass and one from aluminum. (the aluminum and brass units were purchased at the same time from the same vendor and had the same part number).
I just ordered a couple of more units but when I clicked on the link in my first order a similar laser but from a different vendor and at a different price was displayed. The way these units are manufactured and sold is very strange.
A fun toy, it probably will work but don’t expect a high quality unit.
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|A reasonably-priced SERIOUS presentation laser,
Most of the reviews evaluate this item on the basis of its “fun factor.”
This laser rates really high on the cool scale. Sure it will confound your cat and blind your friends in that context — I’d even be wary that it may cause permanent retina damage if aimed carelessly/foolishly.
So don’t do that, PLEASE; and don’t lend it to your son or daughter, even for a moment.
But I am a secondary science teacher, and often use LCD projectors or point to the Periodic Table. In that context, this unit REALLY grabs attention, whether the room is lit or not. Astonishingly bright; unusual in its color; highly-focused (no stray beams or static); even shows up clearly on the surface of a CRT or flat screen TV.
Others have commented on the switch (somewhat jiggly and loose; likely to fail?).
I concur. But even with that in mind, I look at the overall quality as compared to price: absolutely no question that this is a GREAT value.
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|Laser is cheap,
This laser is listed at $149 dollars, and has a “92% discount.” It is maybe worth the $11. It is very bright every time you turn it on but dims out after a second. the beam is fairly unfocused. I changed the batteries but it still dims out. Overall maybe worth $11, however i look down on the fact that the merchant would list this laser at a ridiculous price to make it seem expensive. Shady tactic, there. In addition the case is basically cardboard with a magnet in it.
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