Laser Doppler vibrometer

Decent Essays
Improved Essays
Superior Essays
Great Essays
Brilliant Essays
    Page 1 of 5 - About 47 Essays
  • Improved Essays

    The principle of physical governing the measurement system is the Doppler Effect that occurs when the laser beam is reflected from a small area of the testing object that vibrate. The figure below gives the pictorial representation of the Doppler Effect. The loudspeaker represents a sound source and it is assumed that the observer is standing on the right of the speaker. The lines originating from the speaker represents the vibration maxima at a specific observation time…

    • 1464 Words
    • 6 Pages
    Improved Essays
  • Improved Essays

    4. Why PdO/TiON NP powders are chosen as photocatalyst? There are many reasons why PdO/TiON NP powders are chosen as a photocatalyst for MTBE mineralization under visible light. These reasons are listed and discussed as follows: 1- The synergistic effect. 2- The ease of synthesis. 3- The memory effect. 4.1 The synergistic effect Nowadays, modified TiO2 by metal and nitrogen is considered as one of the most promising TiO2 based materials for photocatalytic applications, which is able to…

    • 980 Words
    • 4 Pages
    Improved Essays
  • Improved Essays

    conditions (Task 1), fabrication thermal analysis (Task 2), fabricated parts performance (Task 3), microstructure control methodology (Task 4), respectively. These tasks are designed to answer the questions and solve the problems in the results of preliminary experiments and observations from reported investigations. 5.1. Task 1. Investigating feasible formation conditions and effects of laser power and B content on ultrafine 3DQCN microstructure. 5.1.1. Research questions generation In the…

    • 1607 Words
    • 7 Pages
    Improved Essays
  • Improved Essays

    Have you ever thought about “alien abductions” where there’s the beam of light that draws the person up into the ship, or in Star Wars, the beam that can dock spaceships? That thing you’re thinking of is a tractor beam. Tractor beams are possible, but they are not yet advanced to the extent of Star Wars or alien abductions. The theory is that beam can reel a particle in towards the source. Currently, there are three types of tractor beams, sonic, light, and laser beams. So far, each kind of…

    • 1365 Words
    • 6 Pages
    Improved Essays
  • Superior Essays

    Pasha’s room had a jacuzzi, Angelina’s room and mine, our own bathroom, Jessica and Pasha had their own bathroom, too. There was a kitchen, a table to eat at, a living room, and there was a washer and dryer. The first game that we did was go-karts and it was so wild! I was so scared because I was going fast, I kept bumping to the sides, and I was last place in the end, but the breeze felt good and the go-karts were so fun and crazy!! Angelina could still use her go-kart pass, but she can’t go…

    • 1459 Words
    • 6 Pages
    Superior Essays
  • Improved Essays

    Astigmatism. Nearsightedness (myopia) is when you can see nearby objects clearly, but distant objects seem blurry. Long-sightedness (hyperopia) is when you can see distant objects clearly, but nearby objects seem blurry and Astigmatism causes overall blurry vision. In most cases, laser eye surgery is pain-free and is completed within 15 minutes for both eyes. It takes 24 hours to see improvement in vision without eye glasses or contact lenses.…

    • 1001 Words
    • 5 Pages
    Improved Essays
  • Improved Essays

    some useful information about the properties of the object or phenomenon under test. Interferometers are used to make very small measurements that cannot be achieved with any other method. An important application of interferometry is in the Laser Interferometer Gravitation wave Observatory(LIGO) which is used to detect gravitational waves predicted by Einstein.1.1 The LIGO interferometer is like the Michelson Interferometer as shown in…

    • 1160 Words
    • 5 Pages
    Improved Essays
  • Improved Essays

    This quote means that the infrared technology highlights the density differences and shows that there is something different in the ground. When this happens, the technolodgy can detect all sorts of things. This saved people lots of time and while they used this technology, they found more artifacts than they usually would. The old way to find a city in a large jungle or forest was to take something sharp and cut your way through all the branches and vines to hopefully find something. The…

    • 742 Words
    • 3 Pages
    Improved Essays
  • Improved Essays

    Infrared Spectroscopy

    • 508 Words
    • 3 Pages

    As our society becomes more technologically advanced, many things advance with it. This includes criminal investigations, which can be aided by infrared spectroscopy. IR spectroscopy deals with the infrared region of the electromagnetic spectrum. This region is light with a longer wavelength and lower frequency than visible light. (Wikipedia) IR Spectroscopy is a method to identify substances based on their absorption of infrared wavelengths. It is a study of how the molecules of substances can…

    • 508 Words
    • 3 Pages
    Improved Essays
  • Improved Essays

    What if I told you that a laser can reach the earth all the way from space? You’d think it’s pretty cool right? Well it just so happens to be completely true! Scientists have created lasers to communicate from basically anywhere, and I’m here to tell you how it works. A laser shoots out a diverging beam that goes through the transmitter lens that creates a “well focused beam”. The well focused beam then goes through the receiver lens into the receiver diode. This is called laser communication.…

    • 606 Words
    • 3 Pages
    Improved Essays
  • Previous
    Page 1 2 3 4 5