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18A Core I Test 1 Final > Electro optical Spectrum > Flashcards

Electro optical Spectrum Flashcards

1
Q

Define EO

A

Science and technology of generation, modulation, detection and measurement or display of optical radiation by electrical means

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2
Q

IR BAND: NIR

A

Solar reflections, very hot objects

0.72-3 microns

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3
Q

IR BAND: Mid IR

A

Man made emissions, solar reflections

3-6 microns

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4
Q

IR BAND: Far IR

A

Natural background peak emissions, man made emissions

6-15 microns

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5
Q

Infrared radiation characteristics

A

All objects above absolute zero emit IR radiation

Absolute 0= 0K = -273C

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6
Q

What three things can happen to energy

A

Absorption

Reflection

Transmission

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7
Q

Characteristics of lasers

A

Monochromatic

Highly coherent in Phase

Sharply focused beam

Highly directional

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8
Q

Discuss some applications of EO sensors

A 
EO/IR imaging Systems 
Video trackers
Detectors
Terminal homing seekers
Automatic target recognizes
IRCM Systems
Laser Systems
Space imaging systems
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9
Q

Types of terminal homing seekers

A

Imaging - high res and detailed tgt shape

Nonimaging - los res and detail

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10
Q

Types of thermal detectors

A

Thermal

Quantum - requires cooling

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11
Q

Infrared detection considerations: Source Heating

A 
Sun angle
Season 
Weather
Orientation
Thermal crossover
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12
Q

Infrared detection considerations: Source viewing

A

Background
Approach axis
IR Decoys
Distance

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13
Q

Define black body

A

Hypothetical entity that absorbs all energy

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14
Q

Define emissivity

A

Ratio of radiant exitance of a given object and a theoretical black body at the same temp

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15
Q

Define radiant exitance

A

The rate at which radiation is emitted from a unit area

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16
Q

Define reflected IR

A

Reflected solar radiations

17
Q

Define thermal radiations

A

Heat emitted by an object

18
Q

Is Temperature or Emissitivity more important for Thermal signature

A

Temperature

19
Q

Types of EO/IR Imaging Systems

A 
FLIR systems (Far IR)
Targeting Pods (Mid/Far IR)
Imagery Systems (Visual/Near IR)
20
Q

Types of Video Trackers

A

TV Cameras
Targeting Pods
Air-to-Ground Munitions

21
Q

Types of IR Detectors

A

IRSTS Systems
Missile Warning Sets
Laser Warning Sets

22
Q

Types of Laser Systems

A

Laser Rangefinders

Laser Tgt Designators

23
Q

What causes atmospheric attenuation

A 
conditions that partially absorb or totally block IR Energy, Such as:
moisture
dust
smoke
clouds
chemical compounds
24
Q

What is a detection problem

A

Detection systems must gather the signal-of-interest and convert to a usable form (resolution)

25
Q

What are characterstics of Vis and UV Band

A

Visable passes largely unattenuated through the atmosphere.

UV is attenuated by the atmosphere.

18A Core I Test 1 Final (5 decks)

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