 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
| HomeDiscussion Groups General ModelsRailroadsRocketsRadio Controlled Air ModelsHelicoptersLand ModelsWater ModelsModelGeeks.com Contact UsLink To UsSearch & Site Map |
Model Forum / General / Models / March 2006why do we use IR filters for night flight
hi all, can anyone explain me why do we use IR searchlights for night flight and landing? is it only for military operation cases or is there any other phisical civil benefits (safety? better illumination? ???) thanks a lot! > hi all, > can anyone explain me why do we use IR searchlights for night flight > and landing? > is it only for military operation cases or is there any other phisical > civil benefits (safety? better illumination? ???) > thanks a lot! I don't know about IR searchlights, but IR vision systems are being tested for airliner use because IR transmits through fog and haze better than visible light. The IR vision systems I am familiar with are PASSIVE ones, FLIRS, that use the IR signature emitted by virtue of the temperature of the object. One can make a visual approach to a runway that is fogged in and invisible to human vision. If the fog is heavy enough, even the thermal IR cannot penetrate, but lots of the time the runway is invisible in visible light but visible in LWIR. >> hi all, >> can anyone explain me why do we use IR searchlights for night flight [quoted text clipped - 11 lines] > enough, even the thermal IR cannot penetrate, but lots of the time the > runway is invisible in visible light but visible in LWIR. Unless the laws of physics have changed since I worked on FLIRs, fog and rain are two of their worst enemies...a radar would perform the task you describe FAR better. I could see a civil system employing a combination of IR illuminators and NVDs - to allow personel in the control tower to visually spot traffic both in the air and on the ground at night within the ATA. That would be useful. Plus the IR searchlights wouldn't interfere wih the flight crew's vision.  Signature- Rufus |
Reply to this Message |
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2009 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.