Flir ThermovisionVoyager II Operators Manual

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Weather
Environmental conditions, including time of day, humidity, and 
precipitation, will aff ect image quality and contrast. Fog, smog and rain 
will decrease the range at which you can detect a given target. After sunset, 
objects warmed by the sun during the day will radiate their stored heat for 
several hours. Early in the morning, many of these objects will appear 
cooler than their surroundings, so be sure to look for subtle temperature 
diff erences in the scene, not just hot (white) targets. 

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MORE ABOUT INFRARED
At fi  rst blush, new technologies can appear intimidating. Infrared cameras 
may seem imposing, but they are not so diff  erent from digital camcorders. 
In fact, you can get years of enjoyable, productive use out of your Voyager 
without knowing anything in this section. But, if you would like to learn 
more about thermal imaging – how it was discovered and developed – 
read on.
Infrared – the early years
Th  e road to modern thermal imaging began way back in 1666, when Sir 
Isaac...

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High school physics revisited
Infrared radiation combines with Gamma rays, X-rays, Ultra Violet, 
Visible Light, Microwaves and Radio Waves to form a range of energy 
called the Electromagnetic Spectrum. 
Th  ese are not independent types of energy – in fact, the primary diff erence 
between each of these types of radiation is wavelength: Radio Waves have 
the longest wavelength and Gamma Rays have the shortest.  Wavelengths 
are measured in micrometers, or “microns” (μ), which are equal to one...

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2) At a given temperature, the amount of thermal energy radiated by an 
object depends on its emissivity. Emissivity is the measure of an object’s 
effi  ciency at radiating thermal energy.  For example, shiny metals are poor 
emitters.  Instead of radiating their own thermal energy, they tend to 
refl ect radiation from their surroundings. 
Infrared, from theory to practical application
Infrared imagers operate by detecting the relative intensities of thermal 
energy radiated from the surfaces of...

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Th  ermal energy doesn’t pass through much, but it does “transmit” through 
some plastics. When a material is not transparent to infrared radiation, 
it is said to be “opaque.” Most commonly viewed materials are opaque to 
infrared radiation.
Materials that mirror the infrared signatures around them are “refl ective.”  
Ever y thing is refl ective to one degree or another, but the most highly 
refl ective objects are those made of polished, unpainted metal.  Painted 
metals, glass, and even wood can...

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Under typical conditions however, atmospheric moisture and dust scatter 
can absorb some of the radiated energy before it reaches the imager. Th e 
eff  ect of this is to weaken the overall thermal signal and shorten the range 
at which you can detect it.
Th  e weather can impact more than just the range at which the Voyager can 
detect a specifi  c object – it can also aff  ect an entire scene’s thermal contrast 
and aff ect overall system performance.
Cloud cover aff ects the diurnal cycle in two ways:...

APPENDIX
PARTS LIST AND ACCESSORIES
SYSTEM OVERVIEW 

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APPENDIX
Parts List
Th  e Voyager includes the following thermal imaging components:
If the components you have are diff erent from those enumerated in this parts list, 
please call us immediately at 888.747.3547.
Vo y a g e rFLIR Part Number
Camera Body7. 3 ”x 4 . 0 ”x 8 . 0 ”
432-0002-01-00
432-0002-01-00S
432-0002-02-00
432-0002-02-00S
Bulkhead Box6lb500-0348-00
Joystick Control Unit (JCU)500-0353-00
Camera Cable
50’ 
or 
10 0 ’308-0149-50
or 
308-0149-100
JCU Cable10 0 ’ 308- 0139- 0 0
Operator’s...

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SYSTEM OVERVIEW 
Size15” x 23”
Weight45 lb.
Azimuth Field-of-Regard360° Continuous
Elevation Field-of-Regard+/-90°
Slew RateVariable to 120°/sec.
Thermal Imaging Performance
Sensor Type2 Microbolometer Cameras
Wide FOV Imager20° x 15° (35mm) 
Narrow FOV Imager5° x 3.75° (140mm)
Spectral Range7.5 to 13.5 μm
Daylight Imaging Performance
Sensor Type1/4” Super HAD
Wide FOV Limit42° horiz. @ F1.6
Narrow FOV Limit1.6° horiz. @ F3.8
System Speci cations
Pan/Tilt Coverage360° Az./ +/-90° El.
Video outputNTSC...