Lasers - The New Mythical Gift Of Fire

In Greek mythology, the Titan Prometheus gave the gift of fire to Humanity. It provided warmth, light, and energy. Whether or not you believe that myth, humanity has learned to concentrate that light into beams of unimaginable power: Lasers. What does that word make you think of first? Science fiction ray guns? A secret agent strapped to a table while a metal-melting beam of light inches toward him? Or maybe the master thief throwing dust in the air to reveal a deadly maze of red laser beams guarding the treasure? Those are all popular but outdated images of the laser. Today, lasers vanquish different foes such as unwanted hair, vision correction, and even tumors. How is a beam of light able to delicately reshape the surface of the eye, yet still be able to cut steel? LASER is an acronym for "Light Amplification by Stimulated Emission of Radiation." In this definition radiation doesn't refer to nuclear radiation, but to electromagnetic radiation. The electromagnetic spectrum includes radio waves, microwaves, infrared light, visible light, ultraviolet radiation, and X-rays. Some light wavelengths are visible, and other are not unless special equipment is used (e.g., infrared cameras, night-vision goggles). Lasers operate by concentrating the strength of various forms of light. The strengthened beam is an almost perfectly straight beam, called a coherent beam. "Coherent" means that almost all of the light energy (photons) are traveling in the same direction. The laser light energy stays focused on a smaller area with greater power. Compare this to an incoherent light source such as a light bulb, which emits photons in many directions and at many wavelengths. This is the job of a bulb, because we want visible energy spread out as much as possible. A flashlight also uses a light bulb, but also contains a curved mirror to approximate a more coherent beam. The light from the strongest commercial spotlight (essentially a giant flashlight) will disperse in the atmosphere after a relatively short distance. A laser beam can be bounced off the moon! http://sunearth.gsfc.nasa.gov/eclipse/SEhelp/ApolloLaser.html A closer analogy to a laser is a magnifying glass. Remember as a child how you got the sun's rays to focus on a tiny spot that got hot enough to burn? That's similar to what a laser does, unless you moved the magnifying glass. Then the focus was lost and the sunlight was no longer concentrated. Because the laser employs a coherent beam, that essentially means it stays focused no matter the distance! Think of it link an infinite magnifying glass. Lasers can perform a multitude of different tasks at different power levels. Specific light wavelengths and beam strengths can be achieved by altering the light source, power source, and even the color of the light. This extreme versatility allows both the shaping of a delicate cornea and the cutting of industrial steel. The laser in your CD player won't cut steel, but neither can the industrial laser play a music CD without destroying it. Matching the right laser power to the right job enables us to safely harness this magical new fire. Learn more about medical lasers and laser hair removal by using the resources below.

Laser Technology

Laser technology is used in almost every scope of life, from the miniscule lasers in CD players to the lasers used to scan groceries in the checkout line to the massive lasers in aeronautics design. The discovery of laser technology and the subsequent building of ever-improving lasers have benefited the human race tremendously, particularly through medical advances. Medical lasers cause medical procedures to be quicker, better, and easier than their traditional counterparts. The only drawback is increased cost. In 1917, Albert Einstein was the first person to suggest the basics of what would become lasers, by discussing the theory of Stimulated Emission, which is a type of electron transition in which a photon is emitted from an atom causing a chain reaction with other atoms to repeat the action. In fact, the word laser is an acronym for Light Amplification by the Stimulation Emission of Radiation. Charles Townes, an American physicist, further developed the idea with microwave (invisible) light in the mid- to late-50’s and Theodore Maiman built the first working optical (visible) light laser in 1960. Improvements and variations on hundreds of kinds of lasers continue to be made since the 1960s. Those involved in quantum mechanics have been studying some form of lasers, either in theory or in reality, since the 1920s. Uses for laser technology are widespread and are included in such important fields as medical/surgery, communications, design, manufacturing/industry, and research. Medical/Surgery The advancement of medical lasers has vastly improved the ease and success of surgery. The cost, however, is greater than that of other treatments, though scarring is much less with lasers and lasers work much more quickly than older surgical options. Incisions are more precise and easier to control. Some medical areas in which lasers have deeply refined treatment options are in laser eye surgery, oncology, neurosurgery, cardiology, dermatology, veterinary surgery, and dental surgery. Communications Televisions, telephones/ cellular phones, and computer systems all benefit from the use of lasers. Lasers are able to carry the huge amounts of channels and frequencies required by these high-tech devices. Lasers have proven the best communication device to have in the space age. Design Lasers have transformed the world of design by making it possible for designers to perform with precision that was previously unavailable. Lasers are used to design digital and three-dimensional objects with much more ease and accuracy through scanning, cutting, copying, and digital archiving. From designing a building to designing landscape, lasers prove to be the best option for fast and easy design. Manufacturing/Industry Lasers have improved the manufacturer’s ability to produce tenfold. For example, with a laser cutter, a clothing manufacturer can have fabric patterns cut much more quickly and more accurately in no time. A jeweler has much more precision on his side when employing lasers to work on fine gems. Airplane designers can construct an aircraft much more efficiently and with greater results using laser technology. Research The use of lasers in research enables scientists to uncover much more detail and detect very slight movement when studying matter. The lasers can be tailored to only respond to certain colors or movements and, in that way, they provide much more specialized work in research environments. The world of laser technology is always expanding by producing new applications and ways to benefit people. The dependence that the modern culture has on lasers is amazing considering that it was not prevalent until the past forty years.

Buy Laser Printer for effective printing

Computer printers are an important peripheral for any business houses today. The use of printer is endless you can use a printer for printing reports, documents, publishing newsletters or for just printing photos. One of the most preferred printers in many big business houses today is a laser printer.

A laser printer utilizes a laser beam to produce an image on a drum. The light that the laser releases alters the electrical charge on the drum. The drum is then rolled through a toner picked up by the charged portions of the drum. Finally the toner is transferred to the paper through a combination of heat and transfer.

Laser printers are considered to be the most ideal printing tools for printing today. Initially due to their high cost they were only favorable to big business houses however off late with a fall in prices they have been accepted in both homes and office environments.

Laser printer is known for its high quality text printing and excellent graphics printing. Though laser printer has a much higher initial cost as compared to inkjet printers or dot-matrix printers but they have a comparatively much lower running cost.

Laser printers are controlled through page description languages (PDLs). Page description languages have two de facto standards
• Printer Control Language (PCL)
• PostScript

Most software can print using either of these page description languages. PostScript is more expensive than PCL but it has additional features that PCL lacks.

Tips that can help you select the right printer
• Decide what type of documents you will be printing
• Decide what featured you will need like ability to handle large files, ability to print on various media, two or more paper trays etc
• Compare the print quality of different printers
• Compare the resolutions of different printers
• Compare the speed specifications of different printers
• Check whether the printer’s paper path is sharper than 90 degrees to handle envelopes, card stock and transparencies.
• Compare printer warranties and service contacts.

If you sit and work upon the above useful tips you will realize that laser printer just fits the bill.