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.
200mW 650nm Large Size Igniting Matches Flashlight Style Red Laser Pointer
This 200mW 650nm Large Size Igniting Matches Flashlight Style Red Laser Pointer is small and exquisite, portable and with richer applications. Laser pointer is a good guide for your traveling, and a good tool for pointing to the faraway target or stars and sending out the SOS signal, making your travelling funny and interesting. This red laser pointer is also the best gift for friends and families.
Super laser pointer, wonderful gift to anyone from kids to adult
Use your laser pointer to point any targets, it's convenient for your daily life
Power saving, lightweight, suitable for putting in your pocket or handbags
This high quality laser pointer adopts the latest technology optics and microelectronics
This laser pointer can be used for presentation, teaching indicator, children amusement and more
> 100 miles
1 x 18650 Battery
It looks like a flashlight
The way to install the battery
It is placed with 1 18650 battery
Bright red light
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 200mW 650nm Large Size Igniting Matches Flashlight Style Red Laser Pointer
1 x 18650 Battery
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Date Added: 11/26/2012 by
This laser is great. Today I lit a match from 64 feet away. I used a jewelers loupe to focus the beam. The match lit up. Without the loupe I can get it to lit a match from about four or five feet away. With the jewelers loupe I bet I can go even farther. That is just as far as I have tried so far. Thanks