21-03-2012, 01:59 PM
NIGHT VISION ENHANCER
NIGHT VISION ENHANCER.pptx (Size: 1.01 MB / Downloads: 97)
INTRODUCTION
"Night vision" as referenced here is that technology that provides us with the miracle of vision in total darkness and the improvement of vision in low light environment. Night vision has existed for more than fifty years. Its importance is remarkable mostly in warfare, though night vision has numerous uses. Modern hunters rely in night vision to hunt animals during the night without being exposed to them
Night vision has had many improvements throughout the course of history. Its beginning date back to Second World War when the Germans idealized a very effective way to easily use their sniper rifles during the night. This was later researched very deeply into because night vision proved to have a devastating advantage for those who used it.
Green LED
A light-emitting diode (LED) is a semiconductor light source. LEDs are used as indicator lamps in many devices and are increasingly used for other lighting. early LEDs emitted low-intensity red light, but modern versions are available across the visible, ultraviolet and infrared
Wavelengths, with very high brightness. LEDs are often small in area (less than 1 mm2), and integrated optical components may be used to shape its radiation pattern. LEDs present many advantages over incandescent light sources including lower energy consumption, longer lifetime, improved robustness, smaller size, faster switching, and greater durability and reliability. LEDs powerful enough for room lighting are relatively expensive and require more precise current and heat management than compact fluorescent lamp sources of comparable output.
Resistor
A linear resistor is a linear, passive two-terminal electrical component that implements electrical resistance as a circuit element. The current through a resistor is in direct proportion to the voltage across the resistor's terminals. Thus, the ratio of the voltage applied across a resistor's terminals to the intensity of current through the circuit is called resistance. This relation is represented by Ohm's law:
CACITOR
A capacitor (formerly known as condenser) is a passive two-terminal electrical component used to store energy in an electric field. The forms of practical capacitors vary widely, but all contain at least two electrical conductors separated by a dielectric (insulator). Capacitors are used as parts of electrical systems, for example, consist of metal foils separated by a layer of insulating film.