9 - EO Intro

Question 1

Benefits of Electro Optics

Answer 1

• Passive (covert)
• Precision imaging tracking

Question 2

6 Bands of the EO Spectrum

Answer 2

1. UV
2. Visible
3. Near IR
4. Mid IR
5. Far IR
6. Extreme IR

Question 3

Visible Imaging System traits

Answer 3

• .4-2.0 micrometers
• Detect & amplify visible energy reflected
• Night Vision Goggles

Question 4

IR Imaging Systems traits

Answer 4

• 3-14 micrometers
• Detect energy radiated from a target
• Thermal imagers

Question 5

EO Classifies by___?

Answer 5

Wavelength

Question 6

Types of EO Radiators

Answer 6

1. Thermal Radiators
2. Selective Radiators

Question 7

Selective Radiators

Answer 7

Concentrated in narrow wavelength bands

Question 8

Thermal Radiators

Answer 8

Output over continuous spectrum of wavelengths

Question 9

Blackbodies

Answer 9

An ideal substance that absorbs all incident energy –> Perfect absorber
Assumes 100% of absorbed energy is emitted –> Perfect radiator/emitter

Absorptivity = 1

Question 10

Graybodies

Answer 10

Real objects
EO Energy may either absorb, reflect, or pass through

Absorptivity & Reflectivity = 1
Transmissivity = 0 *opaque= no energy transmits through

Question 11

What is Planck’s Law?

Answer 11

Calculates how much energy an object radiates at each wavelength at a given temperature

Question 12

What is Wien’s Law?

Answer 12

Max wavelength is the wavelength of maximum blackbody radiation
* Changes with Thermal Radiators temp (T)