Renfro power point_presentation_assignment[1]

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night vision technology.

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Renfro power point_presentation_assignment[1]

  1. 1. Development through Military History into Modern Daily Use. By: Vikas Kumar Sinha
  2. 2.  Night vision technology has shaped history.  Pre 1940’s: Flares and spot lights were used for operations at night.
  3. 3.  Due to the nature of these early night vision devices (NVD), they gave away tactical positions.  Military scientists began to think of ways to improve night vision to gain a strategic advantage.
  4. 4. A tank from World War II equipped with a search light used for night combat.
  5. 5.  The first night vision devices (NVD) were created during WWII.  Functioned by placing an infrared filter over a searchlight.  Fighters would use special binoculars to see using the light from the searchlights.  Many problems came from this night vision method.
  6. 6. Why do NVD devices always show images in hues of green? The original designers of NVD d an obsession with the color. B)The actual first inventors of NVD were little green aliens. C) NVD use green because it allows for more defined images.
  7. 7. C The screen was purposefully colored green due to the scientific fact that the human eye can differentiate more shades of green that any other color.
  8. 8.  There were many disadvantages to using the searchlights and flares.  The actual searchlight was massive and had to be mounted on a truck or tank.  Both the Allies and Nazi’s had this technology, so they each could see the others light.
  9. 9.  The images created were streaky and distorted.  The acceleration of electrons cut the life of the image intensification tube, which was the most important and expensive part of the NVD, very short.  Military scientists began planning a revised design.
  10. 10.  Post WWII NVD technology focused on the ability to see without creating additional light.  During this time period the first “Generation” of NVD began using intensified natural lighting.
  11. 11.  Military scientists created a two-stage cascade image tube.  This tube intensified the natural lighting and created a superior image for the viewer.  The power of Generation 1 NVD was put to the test in the Vietnam War.
  12. 12. Generation 1 NVD were commonly called what during their use in the Vietnam War? A) Star-Tron Scopes B) Moon Beams C) Space Goggles
  13. 13.  A  Star-Tron Scopes was the common name given to the NVD in Vietnam.  There were still many problems military scientists wanted to work on.
  14. 14.  Star Tron Scopes intensification tubes were as heavy as the rifles they were mounted on.  They were not sensitive enough to give clear images in anything less than full moonlight.  The NVD emitted a whiney noise.  They would shut down if they were exposed to a sudden burst of bright light.
  15. 15.  There were two major developments in NVD technology after their test in Vietnam.  The first was a new micro-channel plate (MPC) that was light weight, and more effective at focusing light into clear images.  The second major development was the invention of thermal imagining.
  16. 16.  Thermal imaging allowed for NV even through low natural lighted conditions.  It also allowed for NV through smoky, dusty, and foggy conditions.  These thermal imagers were expensive, so in 1973 scientists created a common module that made it less expensive, and more ideal for military use.
  17. 17.  The generation 2 NVD were first put to the test by US forces in the early 1990’s during Operation Desert Storm in Kuwait.  The dark nights and harsh dusty conditions were perfect for implementing the new technology.
  18. 18.  The currently generations of NVS are generations 3 and 4.  Generation 3 is much like generation 2 except for it has a substantially longer life, as well as more defined images.  Generation 4 has less noise than generation 3, however it has shorter life.
  19. 19.  Here is a chart comparing the life in hours of the intensification tube for generations 1-3 Generation 1 Generation 2 Generation 3 2,000 hours 2,500- 4,000 hours 10,000 hours
  20. 20. Which of the 4 Generations of NVD is the current model used by the U.S. Military? A)Generation 1 B) Generation 2 C) Generation 3 D) Generation 4
  21. 21. C) Generation 3 U.S. forces use generation 3 because despite its slightly less clear image, and slightly more noisy design compared to generation 4, it has a longer life in hours which is more important when all things are considered.
  22. 22.  Development of NVD up until the 1980’s was completely focused around military purposes.  In the 80’s, companies in the US and Europe took NVT and found ways to improve everyday civilian life.
  23. 23.  There are many practical everyday uses for NVD, some of which are:  Law Enforcement  Hunting  Surveillance
  24. 24.  Security  Navigation  Hidden-Object detection  Entertainment
  25. 25. Common applications for night vision include:  · Military  · Hunting  · Wildlife observation  · Surveillance
  26. 26.  · Hidden-object detection  · Entertainment  · Security  · Navigation
  27. 27.  In conclusion I believe that is wonderful how something originally designed for destruction, can now help people on an every-day basis.  Personally, NVD have saved my brother-in- law from harm in his job through NVD navigation technology.  This is truly amazing technology.
  28. 28.  Unknown author, “Night Vision Devices”. BookRags. 11/12/2008 <http://bookrags.com>  Unknown author, “Night Vision Goggles”. GlobalSecurity. 11/10/2008 <http://www.global securities.org>  Unknown author, “How Night Vision Works”. How Stuff Works. 11/11/2008 <http://electronics.howstuffworks.com>

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