Laser pointers with 405 nanometers wavelength of light are also called blue violet laser pointers. Although it is rarely prefered to the green and red ones, it could be used for what others do, which also reflects the individual unique aesthetic taste. It is probably not as much preferred lasers as an astronomy laser pointer, because brighter colors would make an object more visible in the sky. However it comes down to all other uses such as pinpointing something on the large screen or on the blackboard.
Green laser pointers is now the world's most popular laser pointers, because the green light than red light 6 times more than red light beam significantly, while the price is much cheaper than the blue and yellow. Green pen is the wavelength of light emitted 500-550nm, the wavelength sensitivity of the coefficient table, as is the closest one wavelength. Green is undoubtedly efficient light source, the eye more easily identified. The green light sensitivity of the human eye is higher than a lot of red; the other is green light scattering in the atmosphere more than red light.
Red laser pointers, wavelength 630-670nm green laser pointer is more for longer. The first red pointer was released in the early 1980s. Nowadays, the red laser diode technology has been very mature. More durable, the price is much more cheaper than ever. More easily transmitted red light air, dust, water vapor, so the light path can be seen to need more power. 100 mW red laser pointers probably only about 20 milliwatts, and green. Do remember that red laser pointers are powerful since the light they emit is powerful when it hits a certain object and converges into a point.
Place to note
Now, more and more laser pointers and flashlights sold in the market are class IIIB with a power over 5mW. But when the laser directly penetrates into the eyes, there may be some damage. Especially to some high power laser pointers, diffuse light probably damage the eyes, the focus are more likely to ignite flammable materials. Therefore laser pointers are not a toy, not suitable for children. When operating high-power laser, wear special secure glasses would be safe, especially for the invisible laser. In a word, no matter how much power the laser power is, you need to avoid hitting into your eyes.
The most remarkable feature of this laser pointer pen must be its dual-color beam light! It makes this pen quite distinctive from ordinary one. Adopting the latest laser technology together with aluminum material, it is durable and reliable for daily aiming purpose. Sending out red and green beam light, it is characterized by high accuracy and rapid response. Furthermore, the kit comes with a charger, a stand and a battery for convenient use. This LT-WJ228 300mW 532nm Dual-color Beam Light Zooming Laser Pointer Pen Kit Silver is undoubtedly worth your paying!
532nm wavelength needs sophisticated and precise technology
Faddish appearance, smooth surface and excellent durability
Compact size, lightweight and portable
It emits red and green beam light to create amazing effect
Support focusable performance
Point at any desired target on projection screens, video monitors, and presentation graphics
Perfect for teachers, professors, doctors, managers, engineers and so on
The kit comes with a battery, a charger and a stand
LT - WJ228
Red and Green Laser Beam
Red and Green
1 x 18650 Battery
DC 3V - 3.7V
Perfect Working Environment
0 - 35°
Strap / Clip
(6.69 x 1.18 x 1.18) " / (17 x 3 x 3) cm (L x W x H)
3.70oz / 105g
It looks like a flashlight
The end of the laser pointer
The product included
You can use the laser pointer pen for camping, architecture, SOS and astronomy
The "picture show" is only for your reference, please make the object as the standard.
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