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.
2000mW Focus Starry Pattern Pure Blue Light Laser Pointer Pen with 18650 Rechargeable Battery Red
Powered by high-capacity 18650 battery, this 2000mW Focus Starry Pattern Pure Blue Light Laser Pointer Pen with 18650 Rechargeable Battery Red can work for long lasting time. It can produce starry pattern light. In addition, the focus design makes it much better. It can be used to point board, screen, and blackboard and so on. No matter where it points, this pure blue starry pattern can stand out from others. It is also a good way to create romantic and warm atmosphere. Under the help of this practical and cost-effective laser pointer pen, you are able to enjoy your presentations easily. You cannot miss this chance to get the high-performance laser pointer pen.
It can be focused
Produce pure blue starry pattern
Made of high quality material, so it is enough durable for long time using
The laser can be seem as far as the eye can see
Power saving, compact and reliable
Simply press the button to activate the laser pointer pen and release it to deactivate
Lightweight and handy design, it is very convenient to put in bags or pockets
It's more convenience that use laser to point to the target instead of hands
Point at any desired targets on projection screens, video monitors, and presentation graphics
Perfect for teachers, professors, doctors, managers, engineers and so on
1*18650 Li - ion Battery
15.31 oz / 434 g
7.20 x 0.91" / 18.3 x 2.3 cm (L x Dia)
Laser comes out from here
Insert the batteries from here
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.
1 x Laser Pointer Pen
1 x Battery Charger
1 x 18650 Battery
5 x Pen Head
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