General Information About the Four Kinds of Laser Pointers
12:29 AM // 0 comments // Sajib Barua // Category: Laser Pointers , technology //Earlier, there is always a question hovering in my mind that whether the four kinds of laser pointers have different features and functions or the difference just lies in the color—green, blue, red and purple. Have you ever posed such a question?
Green laser pointer
Green laser pointer comes with a wavelength roughly around 510-570 nm. The choice of laser media for these wavelengths is limited, and performance that is achievable is usually not as good as for example in the infrared spectral region. However, the green laser pointers of various kinds are among the most widely used visible laser pointers.
A green laser pointer is brighter than both blue laser and red laser. Green laser pointers are very popular for star pointing, and if you Google green laser pointer you will see that you will find tremendous amounts of data about the topic.
Blue Laser Pointer
A so-called blue laser pointer is a laser that emits electromagnetic radiation with a wavelength of between 360 and 480 nanometers, which the human eye see as blue light or light at the blue end of the spectrum. Diode lasers that emit light at 445 nm has become popular as blue laser pointer s. Laser that operates at wavelengths below 445 nm is perceived as violet to the human eye, a completely different color. This is true for example for the most common commercial blue laser, Blu-Ray. Diode lasers used in Blu-ray applications, emits 405 nm light is violet. This light causes a fluorescent effect of some chemicals, like ultraviolet or "black light" does.
The class blue laser pointer is often the semiconductor laser diodes based on gallium (III) nitride (violet color) or indium gallium nitride (often clear-blue in color, but able to produce other colors, as well). Both the blue and violet lasers can also be built using the frequency-doubling of infrared laser wavelengths of diode lasers or diode-pumped lasers. Devices that use blue laser have applications in many fields ranging from optoelectronic data storage with high density of medical applications.
Red Laser pointer
Laser pointer s in the red spectral region are with a wavelength roughly around 625-700 nm. Red lasers are used as laser pointers, for optical data recording or retrieval (eg on DVD), laser projection displays, such interferometers, the pumping of certain solid-state lasers (eg Cr: LiSAF or Cr: LiCAF), and in medical treatment (eg photodynamic therapy). It is not easy to find red laser of 200mW. Red laser pointers are passed over by both the green laser pointer and blue laser pointer in the market. Red laser can be found for personal use easily and almost anywhere in the form of laser pointer s. These cheap red laser pointers can be used for business meetings and school presentations, or as a toy to tease a pet cat with, for this purpose 5mw or below is the best power choice.
Violet Laser Pointer
Laser pointer s that operates at wavelengths below 445 nm is perceived as violet to the human eye, a completely different color than the blue laser pointer above 445nm. The violet laser pointer has a cool focus onto a surface. The violet laser pointer color is a good option especially for people who have already bought the green and the red laser pointer. The pointers are light hand held devices and they come in wide array of design and functionality difference.
Violet Laser pointers have become widely used as a presentation tool by many business people, allowing them to highlight significant facts and figures in power point slides to their audience. They have grown away from the look of a generic pointing device into a more professional looking tool, taking the shape of usually either a pen (known as a laser pen) or remote control.
Quite a few laser pointer s have got an integrated pen, making them a handy tool for many business people who require both a pointing device and a writing tool. Presentation remote controls are mainly used to control presentation slides in business or any organization that need to convey information to an audience and will more often than not have a violet laser pointer built into the device. They allow the presenter to control the presentation without the need to be standing in a fixed spot to click on the mouse to move onto the next slide and highlight certain information on the screen from almost anywhere in the room with the violet laser pointer.
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Green laser pointer
Green laser pointer comes with a wavelength roughly around 510-570 nm. The choice of laser media for these wavelengths is limited, and performance that is achievable is usually not as good as for example in the infrared spectral region. However, the green laser pointers of various kinds are among the most widely used visible laser pointers.
A green laser pointer is brighter than both blue laser and red laser. Green laser pointers are very popular for star pointing, and if you Google green laser pointer you will see that you will find tremendous amounts of data about the topic.
Blue Laser Pointer
A so-called blue laser pointer is a laser that emits electromagnetic radiation with a wavelength of between 360 and 480 nanometers, which the human eye see as blue light or light at the blue end of the spectrum. Diode lasers that emit light at 445 nm has become popular as blue laser pointer s. Laser that operates at wavelengths below 445 nm is perceived as violet to the human eye, a completely different color. This is true for example for the most common commercial blue laser, Blu-Ray. Diode lasers used in Blu-ray applications, emits 405 nm light is violet. This light causes a fluorescent effect of some chemicals, like ultraviolet or "black light" does.
The class blue laser pointer is often the semiconductor laser diodes based on gallium (III) nitride (violet color) or indium gallium nitride (often clear-blue in color, but able to produce other colors, as well). Both the blue and violet lasers can also be built using the frequency-doubling of infrared laser wavelengths of diode lasers or diode-pumped lasers. Devices that use blue laser have applications in many fields ranging from optoelectronic data storage with high density of medical applications.
Red Laser pointer
Laser pointer s in the red spectral region are with a wavelength roughly around 625-700 nm. Red lasers are used as laser pointers, for optical data recording or retrieval (eg on DVD), laser projection displays, such interferometers, the pumping of certain solid-state lasers (eg Cr: LiSAF or Cr: LiCAF), and in medical treatment (eg photodynamic therapy). It is not easy to find red laser of 200mW. Red laser pointers are passed over by both the green laser pointer and blue laser pointer in the market. Red laser can be found for personal use easily and almost anywhere in the form of laser pointer s. These cheap red laser pointers can be used for business meetings and school presentations, or as a toy to tease a pet cat with, for this purpose 5mw or below is the best power choice.
Violet Laser Pointer
Laser pointer s that operates at wavelengths below 445 nm is perceived as violet to the human eye, a completely different color than the blue laser pointer above 445nm. The violet laser pointer has a cool focus onto a surface. The violet laser pointer color is a good option especially for people who have already bought the green and the red laser pointer. The pointers are light hand held devices and they come in wide array of design and functionality difference.
Violet Laser pointers have become widely used as a presentation tool by many business people, allowing them to highlight significant facts and figures in power point slides to their audience. They have grown away from the look of a generic pointing device into a more professional looking tool, taking the shape of usually either a pen (known as a laser pen) or remote control.
Quite a few laser pointer s have got an integrated pen, making them a handy tool for many business people who require both a pointing device and a writing tool. Presentation remote controls are mainly used to control presentation slides in business or any organization that need to convey information to an audience and will more often than not have a violet laser pointer built into the device. They allow the presenter to control the presentation without the need to be standing in a fixed spot to click on the mouse to move onto the next slide and highlight certain information on the screen from almost anywhere in the room with the violet laser pointer.
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