Night Vision Technology - 3752 Words

Night Vision Technology M.Raveendra, G.Chaitanya sagar K.L.UNIVERSITY, VADDESWARAM rebelravi278@gmail.com sagargurujula@gmail.com Abstract - Night has its sorcery quality which many humans missed especially on moonless nights. In comparison to many animals which do their gallivanting in the dark, humans cannot see in the dark because their eyes lack tapetum lucidum. This is a layer of tissues in the eyes which improves vision in low light conditions but is present in the eyes of most animals. Fortuitously human ingenuity popped up with night vision optics that made night vision possible. Night vision technology, by definition, literally allows one to see in the dark. Night vision optics is a device to intensify human sight†¦show more content†¦Ã¢â‚¬ ¢ The impulses are sent to a signal-processing unit, a circuit board with a dedicated chip that translates the information from the elements into data for the display. †¢ The signal-processing unit sends the information to the display, where it appears as various colors depending on the intensity of the infrared emission. The combination of all the imp ulses from all of the elements creates the image. 1) Types of Thermal Imaging Devices: Most thermal-imaging devices scan at a rate of 30 times per second. They can sense temperature from -4 degrees Fahrenheit (-20 degrees Celsius) to 3,600 F (2,000 C), and can normally detect changes in temperature of about 0.4 F (0.2 C). [pic] Fig. 3. It is quite easy to see everything during the day [pic] Fig. 4. But at night, you can see very little. [pic] Fig. 5. Thermal Imaging lets you see again There are two common types of thermal-imaging devices: †¢ Un-Cooled – This is the most common type of thermal-imaging device. The infrared-detector elements are contained in a unit that operates at room temperature. This type of system is completely quiet, activate immediately and has the battery built right in. †¢ Cryogenically Cooled – More expensive and more susceptible to damage from rugged use, these systems have the elements sealed inside a container that cools themShow MoreRelatedThe System Of Railway Gate Crossing Burra1010 Words   |  5 Pagestypical 8051 microcontroller manufactured by Atmel. The AT89S52 is a low-power, high-performance CMOS 8-bit microcontroller with 8Kbytes of in-system programmable Flash memory. 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