Teacher : RU-Li Lin

Student : Dun-Yang Huang

Yi-Jhih Chen

Laser(Light amplification by stimulated emission of radiation)

Contents

Invention

Characteristics

Theory

Application

References

Invention

Invented in 1958 by Charles Townes and

Arthur Schawlow of Bell Laboratories Was based on Einstein’s idea of the

“particle-wave duality” of light, more than 30 years earlier Originally called MASER (m=“microwave”)

Characteristics

Monochromatity

Directionality

Intensity

Coherence

Theory

Generally laser generator has three basic elements：

1. pumping source

2. gain medium

3. optical cavity/optical resonator

30%

30%

15%

15%

10%

ApplicationIndustry Medical treatment Print

Location(Military) Others

Laser CuttingUse the high power density of focused laser beam irradiation of the work piece, so that the material rapid melting, vaporization, ablation or achieve ignition by irradiated, while blowing the molten material with the high-speed air stream coaxial with the beam, in order to achieve to cut the work piece. Belong one method of thermal cutting laser cutting.

• High cutting quality• High cutting efficiency• High cutting speed• Non-contact cutting• Many kinds of cutting material

Advantage

• Laser power• Metalworking• Gas-assisted laser cutting• The process of high-pressure inert

gas-assisted cutting• Auxiliary gas cost

Attention

Laser InscriptionThe AGS Laboratories uses Photo Scribe Laser Technologies® cold lasers, which eliminate the risk of damage to the diamond because these lasers operate at a wavelength that does not penetrate the diamond’s surface. Unlike other lasers that produce a feathering effect or can fracture a diamond, 100% of the AGS Laboratories laser's energy is absorbed by the diamond’s surface during the inscription process. 

Laser inscription does not damage the diamond.

Laser inscription does not change the Color or Clarity grade of a diamond.

Laser inscriptions are permanent, but can be removed by a professional diamond cutter.

Myopia laser

Printer

1. Data

2. Electronic circuit

3. Corona wire

4. Photoreceptor drum

5. Laser

6. Ink roller

7. Paper

8. Toner particles

9. Fuser unit

10. Printout

MilitaryIt makes good sense to provide funding to military personnel for standard issue military lasers, not only as a weapon, but also as a life saving device.

Many times a high power laser pointer is the only "homing beacon" a platoon or squadron can rely on to be retrieved during a gunfight or a failed operation.

A high power laser beam is clearly visible through daylight and the night sky, and the most popular military laser pointer in production produces a powerful green laser beam at a light frequency of 532nm.

This is because the military finds the greatest use in the brightest laser color possible to the human eye, the green laser beam. Many military lasers are so powerful that they can actual light a fuse, temporarily blind an enemy, burn, and ignite, making them great for protection and intimidation.

Others

References*https://www.google.com.tw/search?espv

=2&biw=1280&bih=899&tbm=isch&sa=1&q=%E6%BF%80%E5%85%89&oq=%E6%BF%80%E5%85%89&gs_l=img.3..0l10.2644.6202.0.6589.5.5.0.0.0.0.49.217.5.5.0.msedr...0...1c.1j4.62.img..2.3.127.U8Zboyk4oog#imgdii=_

*http://zh.wikipedia.org/wiki/AN/PEQ-2%E9%9B%B7%E5%B0%84%E7%9E%84%E6%BA%96%E5%99%A8

*http://www.lasertech.tw/laser_noun.php?g_id=IyQlKiYlMTMlXiQqJio=

*http://zh.wikipedia.org/wiki/%E6%BF%80%E5%85%89

*http://roaming.op351.net/wp-content/uploads/LASER_please.pdf

*http://eshare.stust.edu.tw/EshareFile/2010_5/2010_5_4148f935.pdf

*http://www1.union.edu/newmanj/Physics100/Laser%20Theory/laser_theory.htm

*http://www.explainthatstuff.com/laserprinters.html

*http://www.warnlaser.com/military-lasers-law-enforcement

References *http://

www.agslab.com/products-laser-inscription.php

*http://tw.wenbanzhu.com/

Thank you for attention