Imaging infrared seekers , Other Engineering

Imaging Infrared Seekers 

A more common approach is to use an infrared waveband where there is a large amount of ambient light from the thermal emission of the
background.
There are three main infrared bands:
- Near Infrared: 0.7 µm to about 2 µm.
• Little thermal emission in this band, but can be used with laser illumination systems.
- Mid-wave Infrared: 3 µm to 5 µm.
• The mid-wave band is good for hot objects because thermal emission peaks in this waveband for aircraft and missile plumes.
- Long wave Infrared: 8 µm to 14 µm.
• The long wave band is good for room temperature scenes since the thermal emission peaks in this band for 300K.
Infrared imagers are used in each of these bands, but there are a number of problems associated with their use and manufacture.
- Silicon photodetectors do not work (CdHgTe).
- The focal planes often require cooling to 77K.
- Few are sold, and therefore need to be made to order, and are far more expensive that visible systems.

Posted Date: 8/27/2012 9:20:03 AM | Location : United States







Related Discussions:- Imaging infrared seekers , Assignment Help, Ask Question on Imaging infrared seekers , Get Answer, Expert's Help, Imaging infrared seekers Discussions

Write discussion on Imaging infrared seekers
Your posts are moderated
Related Questions

find voltage gain of junction field effect transistor

Qualitative risk assessment - fire protection engineering: NFPA 551 discusses the differences between qualitative risk assessment and quantitative risk assessment. Qualitat

Define the aircraft axes & degrees of freedom. Analyse the different maneuvers that can be done by an aircraft.

Income statement: Sosa Corporation recently reported an EBITDA of $31.3 million and $9.7 million of net income. The company has $6.8 million interest expense, and the corporate tax


Principal of Assembly buildings- fire protection engineering: As assembly buildings accommodate members of the public they often accommodate people with disabilities. People


dc load line for a diode & same for circuit consisting of supply voltage in series with resistance & diodes

write a programme of subtraction of two 16 bit numbers