by admin | Jun 4, 2015 | sem1
Fibre optic communication An optical fiber junction box. The yellow cables are single mode fibers; the orange and blue cables are multi-mode fibers: 62.5/125 µm OM1 and 50/125 µm OM3 fibers respectively. Fibre optic communication has revolutionised the...
by admin | Jun 4, 2015 | sem1
Industrial and Medical Applications of Laser Spectroscopy Most types of laser are an inherently pure source of light; they emit near-monochromatic light with a very well defined range of wavelengths. By careful design of the laser components, the purity of the laser...
by admin | Jun 4, 2015 | sem1
Error Analysis All measurements, including ultrasonic measurements, however careful and scientific, are subject to some uncertainties. Error analysis is the study and evaluation of these uncertainties; its two main functions being to allow the practitioner to estimate...
by admin | Jun 4, 2015 | sem1
abc Scan Display Ultrasonic data can be collected and displayed in a number of different formats. The three most common formats are know in the NDT world as A-scan, B-scan and C-scan presentations. Each presentation mode provides a different way of looking at and...
by admin | Jun 4, 2015 | sem1
Types of optical fibers An optical fiber (or optical fibre) is a flexible, transparent fiber made by drawing glass (silica) or plastic to a diameter slightly thicker than that of a human hair. Optical fibers are used most often as a means to transmit light between the...
by admin | Jun 4, 2015 | sem1
Nd-YAG laser Nd-YAG (neodymium-doped yttrium aluminium garnet; Nd:Y3Al5O12) is acrystal that is used as a lasing medium for solid-state lasers. The dopant, triply ionized neodymium, Nd(III), typically replaces a small fraction (1%) of the yttrium ions in the host...
